/* roulang page: index */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 80px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }

        .section-tight {
            padding: 56px 0;
        }

        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }

        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }

        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-dark .section-title {
            color: #FFFFFF;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }

        .section-dark .section-subtitle {
            color: #94A3B8;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 16px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-left a,
        .nav-right a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }

        .nav-left a::after,
        .nav-right a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }

        .nav-left a:hover::after,
        .nav-right a:hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }

        .nav-left a:hover,
        .nav-right a:hover {
            color: var(--color-secondary);
        }

        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            padding: 0 8px;
        }

        .nav-logo a {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .nav-logo a .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 20px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid var(--color-accent);
        }

        .nav-cta:hover {
            background-color: #FFFFFF;
            color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(251, 146, 60, 0.3);
        }

        .nav-cta:focus {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .hamburger span {
            width: 26px;
            height: 3px;
            background-color: var(--color-primary);
            border-radius: 3px;
            transition: var(--transition);
        }

        .hamburger:hover {
            background-color: rgba(56, 189, 248, 0.1);
        }

        /* Mobile nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(15, 23, 42, 0.95);
            z-index: 2000;
            padding: 24px;
            flex-direction: column;
            overflow-y: auto;
            backdrop-filter: blur(16px);
        }

        .mobile-nav.open {
            display: flex;
        }

        .mobile-nav-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .mobile-nav-header .nav-logo a {
            color: #FFFFFF;
        }

        .mobile-nav-close {
            font-size: 32px;
            color: #FFFFFF;
            padding: 8px;
            line-height: 1;
            border-radius: 8px;
            transition: var(--transition);
        }

        .mobile-nav-close:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav-links a {
            font-size: 18px;
            font-weight: 500;
            color: #E2E8F0;
            padding: 14px 16px;
            border-radius: 10px;
            transition: var(--transition);
        }

        .mobile-nav-links a:hover,
        .mobile-nav-links a.active {
            background-color: rgba(56, 189, 248, 0.15);
            color: var(--color-secondary);
        }

        .mobile-nav-cta {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .mobile-nav-cta .nav-cta {
            justify-content: center;
            font-size: 16px;
            padding: 14px 24px;
        }

        /* Hero Section - Bento */
        .hero {
            padding: 60px 0 80px;
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(11, 18, 32, 0.85) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(251, 146, 60, 0.2) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }

        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            min-height: 60vh;
        }

        .hero-main {
            display: flex;
            flex-direction: column;
            gap: 24px;
            justify-content: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(56, 189, 248, 0.18);
            border: 1px solid rgba(56, 189, 248, 0.4);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            width: fit-content;
            letter-spacing: 0.5px;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.5);
            }
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1px;
            color: #FFFFFF;
        }

        .hero h1 .highlight {
            color: var(--color-secondary);
            position: relative;
        }

        .hero h1 .highlight-accent {
            color: var(--color-accent);
        }

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: #CBD5E1;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }

        .btn:focus {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: transparent;
            color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(251, 146, 60, 0.35);
        }

        .btn-secondary {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.35);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-2px);
            background-color: rgba(56, 189, 248, 0.1);
        }

        .btn-light {
            background-color: #FFFFFF;
            color: var(--color-primary);
            border-color: #FFFFFF;
        }

        .btn-light:hover {
            background-color: transparent;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat .number {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-secondary);
            font-family: var(--font-number);
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 13px;
            color: #94A3B8;
        }

        .hero-bento {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .hero-bento-main {
            grid-column: 1 / -1;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-card);
            padding: 28px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: var(--transition);
        }

        .hero-bento-main:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: var(--color-secondary);
        }

        .hero-bento-main .bento-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--color-secondary), #0284C7);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
            color: #FFFFFF;
        }

        .hero-bento-main .bento-content h3 {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 4px;
        }

        .hero-bento-main .bento-content p {
            font-size: 14px;
            color: #CBD5E1;
            line-height: 1.6;
        }

        .hero-bento-small {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-card);
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: var(--transition);
        }

        .hero-bento-small:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--color-accent);
        }

        .hero-bento-small .bento-small-number {
            font-size: 26px;
            font-weight: 800;
            color: var(--color-accent);
            font-family: var(--font-number);
            line-height: 1.2;
        }

        .hero-bento-small .bento-small-label {
            font-size: 13px;
            color: #CBD5E1;
        }

        .hero-cta-bar {
            grid-column: 1 / -1;
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(251, 146, 60, 0.15));
            border: 1px solid rgba(56, 189, 248, 0.35);
            border-radius: var(--radius-card);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-cta-bar span {
            font-size: 15px;
            font-weight: 500;
            color: #E2E8F0;
        }

        .hero-cta-bar .btn-sm {
            font-size: 13px;
            padding: 10px 18px;
        }

        /* Cards generic */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }

        .card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            transition: var(--transition);
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-4px);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(56, 189, 248, 0.05));
            color: var(--color-secondary);
        }

        .card-icon.orange {
            background: linear-gradient(135deg, rgba(251, 146, 60, 0.15), rgba(251, 146, 60, 0.05));
            color: var(--color-accent);
        }

        .card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .card-desc {
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.75;
        }

        /* Brand Intro Section */
        .brand-intro {
            background-color: var(--color-card);
        }

        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: center;
        }

        .brand-intro-image {
            position: relative;
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .brand-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-img);
        }

        .brand-intro-image .badge-float {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .brand-intro-content .brand-name {
            font-size: 26px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 16px;
        }

        .brand-intro-content p {
            font-size: 16px;
            color: var(--color-text-weak);
            line-height: 1.9;
            margin-bottom: 14px;
        }

        .brand-intro-content .highlight-text {
            color: var(--color-secondary);
            font-weight: 600;
        }

        /* Services section */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }

        .service-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 22px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: var(--transition);
        }

        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-6px);
        }

        .service-card .service-num {
            font-size: 40px;
            font-weight: 800;
            font-family: var(--font-number);
            color: rgba(56, 189, 248, 0.2);
            line-height: 1;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .service-card p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
            flex: 1;
        }

        .service-card .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .service-link:hover {
            color: var(--color-accent);
            gap: 8px;
        }

        /* Stats section */
        .stats-section {
            background-image: linear-gradient(135deg, #0F172A 0%, #0B1220 100%);
            color: #FFFFFF;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item {
            padding: 28px 16px;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--color-secondary);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            font-family: var(--font-number);
            color: var(--color-secondary);
            line-height: 1.2;
        }

        .stat-number.orange {
            color: var(--color-accent);
        }

        .stat-label {
            font-size: 15px;
            color: #94A3B8;
            margin-top: 8px;
        }

        /* Case section */
        .case-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .case-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-6px);
        }

        .case-card .case-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .case-card .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }

        .case-card:hover .case-image img {
            transform: scale(1.05);
        }

        .case-card .case-body {
            padding: 24px;
        }

        .case-card .case-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: block;
        }

        .case-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .case-card p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .case-card .case-result {
            display: flex;
            gap: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--color-border);
        }

        .case-result .result-item {
            display: flex;
            flex-direction: column;
        }

        .case-result .result-value {
            font-size: 20px;
            font-weight: 700;
            font-family: var(--font-number);
            color: var(--color-secondary);
        }

        .case-result .result-label {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* News Section */
        .news-section {
            background-color: var(--color-card);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.4fr 0.6fr;
            gap: 32px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            transition: var(--transition);
            background-color: #FFFFFF;
        }

        .news-item:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .news-date {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-width: 70px;
            height: 70px;
            background-color: rgba(56, 189, 248, 0.1);
            border-radius: 12px;
            padding: 8px;
            border: 1px solid rgba(56, 189, 248, 0.2);
        }

        .news-date .day {
            font-size: 24px;
            font-weight: 800;
            color: var(--color-secondary);
            font-family: var(--font-number);
            line-height: 1;
        }

        .news-date .month {
            font-size: 12px;
            color: var(--color-text-weak);
            font-weight: 600;
        }

        .news-content {
            flex: 1;
        }

        .news-content h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .news-content p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .news-content .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .read-more:hover {
            color: var(--color-accent);
            gap: 8px;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-sidebar .side-card {
            background-color: var(--color-dark);
            border-radius: var(--radius-card);
            padding: 24px;
            color: #FFFFFF;
        }

        .news-sidebar .side-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--color-secondary);
        }

        .news-sidebar .side-card p {
            font-size: 13px;
            color: #CBD5E1;
            line-height: 1.7;
        }

        .side-card .side-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-top: 16px;
        }

        .side-card .side-stat {
            background: rgba(255, 255, 255, 0.08);
            padding: 12px;
            border-radius: 10px;
            text-align: center;
        }

        .side-card .side-stat span {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-number);
        }

        .side-card .side-stat small {
            display: block;
            font-size: 11px;
            color: #94A3B8;
            margin-top: 2px;
        }

        /* Plan Section */
        .plan-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .plan-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .plan-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-6px);
        }

        .plan-card.featured {
            border-color: var(--color-secondary);
            background: linear-gradient(180deg, #FFFFFF 0%, #F0F9FF 100%);
        }

        .plan-card.featured::before {
            content: '热门推荐';
            position: absolute;
            top: 16px;
            right: -32px;
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 36px;
            transform: rotate(45deg);
            letter-spacing: 1px;
        }

        .plan-card .plan-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .plan-card .plan-price {
            font-size: 36px;
            font-weight: 800;
            font-family: var(--font-number);
            color: var(--color-secondary);
            margin-bottom: 4px;
        }

        .plan-card .plan-price small {
            font-size: 14px;
            font-weight: 400;
            color: var(--color-text-weak);
        }

        .plan-card .plan-desc {
            font-size: 14px;
            color: var(--color-text-weak);
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .plan-card .plan-features {
            list-style: none;
            text-align: left;
            margin-bottom: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .plan-card .plan-features li {
            font-size: 14px;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .plan-card .plan-features li::before {
            content: '✓';
            color: var(--color-secondary);
            font-weight: 700;
            flex-shrink: 0;
        }

        /* Reward section */
        .reward-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }

        .reward-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .reward-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-6px);
        }

        .reward-card .reward-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(251, 146, 60, 0.15), rgba(56, 189, 248, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
        }

        .reward-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .reward-card p {
            font-size: 13px;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-secondary);
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--color-secondary);
            transition: var(--transition);
        }

        .btn-outline:hover {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        /* Entry Matrix */
        .entry-matrix {
            background-color: var(--color-card);
        }

        .entry-grid {
            display: grid;
            grid-template-columns: repeat(8, 1fr);
            gap: 12px;
        }

        .entry-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 20px 12px;
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            transition: var(--transition);
            text-align: center;
        }

        .entry-item:hover {
            border-color: var(--color-hover-border);
            background-color: #FFFFFF;
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }

        .entry-item .entry-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-secondary), #0284C7);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 18px;
        }

        .entry-item .entry-icon.orange {
            background: linear-gradient(135deg, var(--color-accent), #EA580C);
        }

        .entry-item span {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-text);
        }

        /* Latest updates */
        .latest-list {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .latest-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
            gap: 16px;
            flex-wrap: wrap;
        }

        .latest-row:last-child {
            border-bottom: none;
        }

        .latest-row:hover {
            background-color: rgba(56, 189, 248, 0.05);
        }

        .latest-row .latest-title {
            font-weight: 600;
            font-size: 15px;
            color: var(--color-primary);
            flex: 1;
            min-width: 200px;
        }

        .latest-row .latest-status {
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            background-color: rgba(56, 189, 248, 0.15);
            color: var(--color-secondary);
            white-space: nowrap;
        }

        .latest-row .latest-status.orange {
            background-color: rgba(251, 146, 60, 0.15);
            color: var(--color-accent);
        }

        .latest-row .latest-date {
            font-size: 13px;
            color: var(--color-text-muted);
            white-space: nowrap;
        }

        /* Top list */
        .top-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .top-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 24px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            transition: var(--transition);
        }

        .top-item:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .top-rank {
            font-size: 28px;
            font-weight: 800;
            font-family: var(--font-number);
            color: var(--color-secondary);
            width: 50px;
            text-align: center;
            flex-shrink: 0;
        }

        .top-rank.gold {
            color: #F59E0B;
        }
        .top-rank.silver {
            color: #94A3B8;
        }
        .top-rank.bronze {
            color: #D97706;
        }

        .top-info {
            flex: 1;
        }

        .top-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
        }

        .top-info p {
            font-size: 13px;
            color: var(--color-text-weak);
            line-height: 1.6;
        }

        .top-action .btn-sm {
            font-size: 12px;
            padding: 8px 16px;
        }

        /* User Testimonials */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .testimonial-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
        }

        .testimonial-card .stars {
            color: var(--color-accent);
            font-size: 18px;
            letter-spacing: 2px;
        }

        .testimonial-card p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.8;
            flex: 1;
        }

        .testimonial-card .user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .testimonial-card .user-info .name {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .testimonial-card .user-info .role {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* Partners */
        .partners-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }

        .partner-item {
            padding: 16px 28px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-weak);
            transition: var(--transition);
            white-space: nowrap;
        }

        .partner-item:hover {
            border-color: var(--color-hover-border);
            color: var(--color-primary);
            box-shadow: var(--shadow-card);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--color-hover-border);
        }

        .faq-item.active {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            user-select: none;
            font-weight: 700;
            font-size: 16px;
            color: var(--color-primary);
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--color-secondary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(56, 189, 248, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-secondary);
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background-color: var(--color-secondary);
            color: #FFFFFF;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }

        /* Contact form */
        .contact-section {
            background-color: var(--color-dark);
            color: #FFFFFF;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .contact-info h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .contact-info p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .contact-info .contact-detail {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .contact-info .contact-detail span {
            font-size: 14px;
            color: #94A3B8;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .contact-form {
            background-color: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card-hover);
        }

        .contact-form h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-input);
            font-size: 14px;
            color: var(--color-text);
            background-color: var(--color-bg);
            transition: var(--transition);
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
            background-color: #FFFFFF;
        }

        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--color-accent);
            transition: var(--transition);
        }

        .btn-submit:hover {
            background-color: var(--color-primary);
            border-color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(15, 23, 42, 0.3);
        }

        .btn-submit:focus {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: #CBD5E1;
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-secondary), #0284C7);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.8;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--color-secondary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: center;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
            align-items: center;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-bottom .footer-links a {
            font-size: 13px;
            color: #94A3B8;
            transition: var(--transition);
        }

        .footer-bottom .footer-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 60px;
                --card-gap: 20px;
            }

            .nav-left,
            .nav-right {
                gap: 12px;
            }

            .nav-left a,
            .nav-right a {
                font-size: 13px;
            }

            .hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
                min-height: auto;
            }

            .hero h1 {
                font-size: 36px;
            }

            .hero-stats {
                gap: 16px;
            }

            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .case-cards {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .plan-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .reward-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .entry-grid {
                grid-template-columns: repeat(4, 1fr);
            }

            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .news-layout {
                grid-template-columns: 1fr;
            }

            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --container-pad: 16px;
                --card-gap: 16px;
            }

            .section-title {
                font-size: 24px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .nav-wrap {
                justify-content: space-between;
            }

            .nav-logo {
                order: 2;
                flex: 0 1 auto;
            }

            .nav-logo a {
                font-size: 22px;
            }

            .nav-logo a .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .hamburger {
                order: 1;
            }

            .nav-cta {
                display: none;
            }

            .hero {
                padding: 40px 0 60px;
                background-attachment: scroll;
            }

            .hero h1 {
                font-size: 28px;
                letter-spacing: -0.5px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .hero-actions {
                gap: 12px;
            }

            .btn {
                font-size: 13px;
                padding: 12px 20px;
            }

            .hero-bento-main {
                flex-direction: column;
                text-align: center;
            }

            .hero-cta-bar {
                flex-direction: column;
                text-align: center;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }

            .services-grid,
            .case-cards,
            .stats-grid,
            .plan-grid,
            .reward-grid,
            .testimonials-grid {
                grid-template-columns: 1fr;
            }

            .entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hero-stats {
                gap: 12px;
            }

            .hero-stat .number {
                font-size: 22px;
            }

            .brand-intro-content .brand-name {
                font-size: 22px;
            }

            .news-item {
                flex-direction: column;
                gap: 12px;
            }

            .news-date {
                min-width: auto;
                height: auto;
                flex-direction: row;
                gap: 8px;
                padding: 8px 14px;
            }

            .news-date .day {
                font-size: 18px;
            }

            .news-date .month {
                font-size: 11px;
            }

            .latest-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                padding: 14px 16px;
            }

            .top-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 16px;
            }

            .top-rank {
                width: auto;
                font-size: 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .form-row {
                grid-template-columns: 1fr;
            }

            .contact-form {
                padding: 24px 20px;
            }

            .footer-bottom .footer-links {
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 24px;
            }

            .section-title {
                font-size: 20px;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .card {
                padding: 20px;
            }

            .plan-card {
                padding: 24px 20px;
            }

            .plan-card .plan-price {
                font-size: 28px;
            }

            .stat-number {
                font-size: 30px;
            }

            .entry-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .entry-item {
                padding: 14px 8px;
            }

            .entry-item span {
                font-size: 10px;
            }

            .btn {
                padding: 10px 16px;
                font-size: 12px;
                width: 100%;
                justify-content: center;
            }

            .hero-actions .btn {
                width: auto;
            }

            .reward-grid {
                gap: 12px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 72px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }

        .section {
            padding: var(--section-gap) 0;
        }
        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }
        .section-tight {
            padding: 56px 0;
        }
        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }
        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }
        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }
        .section-dark .section-subtitle {
            color: #94A3B8;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 16px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-left a,
        .nav-right a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }
        .nav-left a::after,
        .nav-right a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }
        .nav-left a:hover::after,
        .nav-right a:hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }
        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #38BDF8 0%, #0F172A 100%);
            color: #FFFFFF;
            border-radius: 10px;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .nav-cta {
            display: inline-block;
            background-color: var(--color-accent);
            color: #FFFFFF !important;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(251, 146, 60, 0.3);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background-color: var(--color-primary);
            color: #FFFFFF !important;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 23, 42, 0.25);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            border-radius: 8px;
            z-index: 1001;
            position: relative;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 1024px) {
            .hamburger {
                display: flex;
            }
            .nav-wrap {
                flex-wrap: wrap;
            }
            .nav-logo {
                order: 2;
                margin: 0 auto;
            }
            .nav-left,
            .nav-right {
                order: 3;
                flex-basis: 100%;
                justify-content: center;
                flex-direction: column;
                gap: 0;
                display: none;
                background-color: #FFFFFF;
                border-radius: var(--radius-card);
                box-shadow: var(--shadow-card);
                padding: 16px 20px;
                margin-top: 12px;
            }
            .nav-left.open,
            .nav-right.open {
                display: flex;
            }
            .nav-left a,
            .nav-right a {
                display: block;
                width: 100%;
                text-align: center;
                padding: 12px 4px;
                font-size: 16px;
                border-bottom: 1px solid var(--color-border);
            }
            .nav-left a:last-child,
            .nav-right a:last-child {
                border-bottom: none;
            }
            .nav-left a::after,
            .nav-right a::after {
                display: none;
            }
            .nav-left a.active,
            .nav-right a.active {
                color: var(--color-secondary);
                background-color: rgba(56, 189, 248, 0.08);
                border-radius: 8px;
            }
            .nav-cta {
                display: block;
                text-align: center;
                margin-top: 8px;
                padding: 12px 20px;
            }
        }

        @media (max-width: 768px) {
            .nav-logo {
                font-size: 17px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 8px;
            }
            .nav-wrap {
                padding: 12px 0;
            }
        }

        .breadcrumb {
            padding: 16px 0;
            background-color: transparent;
            font-size: 14px;
            color: var(--color-text-weak);
            border-bottom: 1px solid var(--color-border);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-weak);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb .sep {
            color: var(--color-text-muted);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-secondary);
            font-weight: 600;
        }

        .rank-hero {
            position: relative;
            padding: 64px 0 72px;
            background-color: var(--color-primary);
            color: #FFFFFF;
            overflow: hidden;
        }
        .rank-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 1;
        }
        .rank-hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.4) 60%, rgba(15, 23, 42, 0.85) 100%);
            z-index: 2;
        }
        .rank-hero .container {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }
        .rank-hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }
        .rank-hero p {
            font-size: 18px;
            line-height: 1.9;
            color: #CBD5E1;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .rank-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            box-shadow: 0 4px 16px rgba(251, 146, 60, 0.35);
        }
        .btn-primary:hover {
            background-color: #FFFFFF;
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(251, 146, 60, 0.45);
        }
        .btn-outline {
            background-color: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .rank-hero-visual {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .rank-hero-card {
            background-color: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: var(--transition);
        }
        .rank-hero-card:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: rgba(56, 189, 248, 0.4);
        }
        .rank-hero-card .rank-num {
            font-family: var(--font-number);
            font-size: 32px;
            font-weight: 700;
            color: var(--color-secondary);
            min-width: 48px;
            text-align: center;
        }
        .rank-hero-card .rank-info {
            flex: 1;
        }
        .rank-hero-card .rank-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 4px;
        }
        .rank-hero-card .rank-info p {
            font-size: 13px;
            color: #94A3B8;
            margin: 0;
        }
        .rank-hero-card .rank-value {
            font-family: var(--font-number);
            font-size: 24px;
            font-weight: 700;
            color: var(--color-accent);
        }

        @media (max-width: 768px) {
            .rank-hero {
                padding: 48px 0 56px;
            }
            .rank-hero h1 {
                font-size: 28px;
                line-height: 1.3;
            }
            .rank-hero p {
                font-size: 15px;
            }
            .rank-hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .rank-hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                text-align: center;
            }
        }

        .stats-overview {
            padding: 48px 0;
            background-color: var(--color-card);
            border-bottom: 1px solid var(--color-border);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 28px 20px;
            border-radius: var(--radius-card);
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .stat-number {
            font-family: var(--font-number);
            font-size: 40px;
            font-weight: 700;
            color: var(--color-secondary);
            letter-spacing: -1px;
        }
        .stat-number.orange {
            color: var(--color-accent);
        }
        .stat-label {
            font-size: 14px;
            color: var(--color-text-weak);
            margin-top: 8px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 30px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 18px 12px;
            }
            .stat-number {
                font-size: 24px;
            }
        }

        .ranking-section {
            padding: var(--section-gap) 0;
        }
        .ranking-section .section-header {
            text-align: left;
            margin-left: 0;
            margin-right: auto;
            max-width: 600px;
        }
        .ranking-table {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 1px solid var(--color-border);
        }
        .ranking-row {
            display: grid;
            grid-template-columns: 70px 1fr auto auto;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .ranking-row:last-child {
            border-bottom: none;
        }
        .ranking-row:hover {
            background-color: rgba(56, 189, 248, 0.04);
        }
        .ranking-row.header {
            background-color: var(--color-primary);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 14px;
            padding: 16px 24px;
        }
        .ranking-row.header:hover {
            background-color: var(--color-primary);
        }
        .ranking-row .rank-pos {
            font-family: var(--font-number);
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-muted);
            text-align: center;
        }
        .ranking-row .rank-pos.top1 {
            color: var(--color-accent);
        }
        .ranking-row .rank-pos.top2 {
            color: #94A3B8;
        }
        .ranking-row .rank-pos.top3 {
            color: #B45309;
        }
        .ranking-row .rank-name {
            font-weight: 600;
            font-size: 16px;
            color: var(--color-text);
        }
        .ranking-row .rank-name small {
            display: block;
            font-weight: 400;
            font-size: 13px;
            color: var(--color-text-weak);
        }
        .ranking-row .rank-stat {
            font-family: var(--font-number);
            font-size: 20px;
            font-weight: 700;
            color: var(--color-secondary);
        }
        .ranking-row .rank-change {
            font-size: 13px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-btn);
            display: inline-block;
        }
        .rank-change.up {
            background-color: rgba(34, 197, 94, 0.12);
            color: #16A34A;
        }
        .rank-change.down {
            background-color: rgba(239, 68, 68, 0.12);
            color: #DC2626;
        }
        .rank-change.same {
            background-color: rgba(100, 116, 139, 0.12);
            color: #64748B;
        }

        @media (max-width: 768px) {
            .ranking-row {
                grid-template-columns: 50px 1fr auto;
                gap: 10px;
                padding: 14px 16px;
                font-size: 14px;
            }
            .ranking-row .rank-pos {
                font-size: 18px;
            }
            .ranking-row .rank-stat {
                font-size: 16px;
            }
            .ranking-row .rank-change {
                font-size: 11px;
                padding: 2px 8px;
            }
            .ranking-row.header {
                font-size: 12px;
                padding: 12px 16px;
            }
        }

        .data-viz-section {
            padding: var(--section-gap) 0;
            background-color: var(--color-dark);
            color: #E2E8F0;
        }
        .data-viz-section .section-title {
            color: #FFFFFF;
        }
        .data-viz-section .section-subtitle {
            color: #94A3B8;
        }
        .viz-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .viz-card {
            background-color: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 28px;
            transition: var(--transition);
        }
        .viz-card:hover {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-4px);
        }
        .viz-card .viz-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background-color: rgba(56, 189, 248, 0.15);
            color: var(--color-secondary);
        }
        .viz-card .viz-icon.orange {
            background-color: rgba(251, 146, 60, 0.15);
            color: var(--color-accent);
        }
        .viz-card h4 {
            font-size: 18px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 8px;
        }
        .viz-card p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .viz-bar {
            height: 8px;
            background-color: rgba(255, 255, 255, 0.08);
            border-radius: 4px;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .viz-bar .fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
            transition: width 1s ease;
        }
        .viz-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-muted);
        }

        @media (max-width: 768px) {
            .viz-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .viz-card {
                padding: 20px;
            }
        }

        .deep-data-section {
            padding: var(--section-gap) 0;
        }
        .deep-data-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .deep-data-content h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .deep-data-content p {
            font-size: 16px;
            color: var(--color-text-weak);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .deep-data-list {
            list-style: none;
            margin-top: 16px;
        }
        .deep-data-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--color-border);
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--color-text);
        }
        .deep-data-list li:last-child {
            border-bottom: none;
        }
        .deep-data-list li .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-secondary);
            flex-shrink: 0;
            margin-top: 10px;
        }
        .deep-data-list li .dot.orange {
            background-color: var(--color-accent);
        }
        .deep-data-image {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-hero);
        }
        .deep-data-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-card);
        }
        .deep-data-image .overlay-tag {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            background-color: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            border-radius: 12px;
            padding: 14px 18px;
            color: #FFFFFF;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .deep-data-image .overlay-tag .badge {
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-btn);
            white-space: nowrap;
        }

        @media (max-width: 768px) {
            .deep-data-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .deep-data-content h3 {
                font-size: 22px;
            }
        }

        .filter-section {
            padding: var(--section-gap) 0;
            background-color: var(--color-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-bottom: 32px;
        }
        .filter-toolbar .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-weak);
        }
        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            background-color: var(--color-bg);
            color: var(--color-text-weak);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            cursor: pointer;
        }
        .filter-btn:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }
        .filter-btn.active {
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
        }
        .filter-results {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .filter-card {
            background-color: var(--color-bg);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .filter-card:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .filter-card .fc-rank {
            font-family: var(--font-number);
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-muted);
            min-width: 50px;
            text-align: center;
        }
        .filter-card .fc-rank.highlight {
            color: var(--color-accent);
        }
        .filter-card .fc-info {
            flex: 1;
        }
        .filter-card .fc-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .filter-card .fc-info p {
            font-size: 13px;
            color: var(--color-text-weak);
            margin: 0;
        }
        .filter-card .fc-value {
            font-family: var(--font-number);
            font-size: 22px;
            font-weight: 700;
            color: var(--color-secondary);
        }

        @media (max-width: 768px) {
            .filter-results {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .filter-card {
                padding: 16px 18px;
                gap: 12px;
            }
            .filter-card .fc-rank {
                font-size: 22px;
                min-width: 40px;
            }
            .filter-card .fc-value {
                font-size: 18px;
            }
            .filter-toolbar {
                gap: 8px;
            }
            .filter-btn {
                font-size: 13px;
                padding: 6px 14px;
            }
        }

        .data-cta-section {
            padding: var(--section-gap) 0;
            background: linear-gradient(135deg, var(--color-primary) 0%, #1E3A5F 50%, #0B1220 100%);
            color: #FFFFFF;
            text-align: center;
        }
        .data-cta-section .container {
            max-width: 720px;
        }
        .data-cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .data-cta-section p {
            font-size: 17px;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .data-cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .data-cta-actions .btn-outline {
            background-color: transparent;
            border-color: rgba(255, 255, 255, 0.35);
            color: #FFFFFF;
        }
        .data-cta-actions .btn-outline:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }

        @media (max-width: 768px) {
            .data-cta-section h2 {
                font-size: 24px;
            }
            .data-cta-section p {
                font-size: 15px;
            }
            .data-cta-actions {
                flex-direction: column;
            }
        }

        .rank-faq-section {
            padding: var(--section-gap) 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            color: var(--color-text);
            font-size: 16px;
            user-select: none;
        }
        .faq-question .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background-color: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-weak);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--color-text-weak);
            font-size: 15px;
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        @media (max-width: 768px) {
            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px 14px;
                font-size: 14px;
            }
        }

        .site-footer {
            background-color: var(--color-dark);
            color: #94A3B8;
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 12px;
            color: #64748B;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
        }
        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 15px;
            border-radius: 8px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #64748B;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            font-size: 13px;
            color: #475569;
        }
        .footer-bottom p {
            margin-bottom: 8px;
        }
        .footer-links {
            margin-top: 12px;
        }
        .footer-links a {
            color: #64748B;
            font-size: 14px;
            margin: 0 8px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                font-size: 12px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-col h4 {
                margin-bottom: 10px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 80px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }

        .section-tight {
            padding: 56px 0;
        }

        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }

        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }

        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-dark .section-title {
            color: #FFFFFF;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }

        .section-dark .section-subtitle {
            color: #94A3B8;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            border: 1.5px solid transparent;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: var(--color-primary);
            border-color: var(--color-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(251, 146, 60, 0.35);
        }

        .btn-primary:focus {
            outline: 3px solid rgba(56, 189, 248, 0.45);
            outline-offset: 2px;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-primary);
            border-color: var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-hover-border);
            color: var(--color-secondary);
            transform: translateY(-2px);
            background-color: rgba(56, 189, 248, 0.05);
        }

        .btn-secondary:focus {
            outline: 3px solid rgba(56, 189, 248, 0.45);
            outline-offset: 2px;
        }

        .btn-light {
            background-color: #FFFFFF;
            color: var(--color-primary);
            border-color: #FFFFFF;
        }

        .btn-light:hover {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

        .btn-outline-white {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.4);
        }

        .btn-outline-white:hover {
            border-color: #FFFFFF;
            background-color: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.4px;
        }

        .badge-blue {
            background-color: rgba(56, 189, 248, 0.15);
            color: var(--color-secondary);
            border: 1px solid rgba(56, 189, 248, 0.3);
        }

        .badge-orange {
            background-color: rgba(251, 146, 60, 0.15);
            color: var(--color-accent);
            border: 1px solid rgba(251, 146, 60, 0.3);
        }

        .badge-dark {
            background-color: rgba(15, 23, 42, 0.85);
            color: #FFFFFF;
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 16px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-left a:not(.nav-cta),
        .nav-right a:not(.nav-cta) {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }

        .nav-left a:not(.nav-cta)::after,
        .nav-right a:not(.nav-cta)::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }

        .nav-left a:not(.nav-cta):hover::after,
        .nav-right a:not(.nav-cta):hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }

        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--color-accent);
            color: #FFFFFF !important;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background-color: var(--color-primary);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(251, 146, 60, 0.3);
        }

        .nav-cta::after {
            display: none !important;
        }

        .nav-logo {
            flex-shrink: 0;
            padding: 0 8px;
        }

        .nav-logo a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-size: 18px;
            font-weight: 700;
            border-radius: 10px;
            flex-shrink: 0;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .hamburger:hover {
            background-color: rgba(15, 23, 42, 0.05);
        }

        /* Breadcrumb */
        .breadcrumb {
            padding: 20px 0;
            background-color: transparent;
            border-bottom: 1px solid var(--color-border);
        }

        .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-weak);
            flex-wrap: wrap;
        }

        .breadcrumb-inner a {
            color: var(--color-text-weak);
            transition: var(--transition);
        }

        .breadcrumb-inner a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb-inner .sep {
            color: var(--color-text-muted);
            user-select: none;
        }

        .breadcrumb-inner .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            padding: 64px 0 48px;
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 60%, #0B1220 100%);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(251, 146, 60, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .category-hero-content {
            max-width: 720px;
        }

        .category-hero .section-tag {
            background-color: rgba(56, 189, 248, 0.2);
            color: var(--color-secondary);
            border-color: rgba(56, 189, 248, 0.35);
        }

        .category-hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            color: #FFFFFF;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }

        .category-hero p {
            font-size: 18px;
            line-height: 1.9;
            color: #94A3B8;
            max-width: 640px;
        }

        /* Filter Toolbar */
        .filter-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
            padding: 16px 20px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
        }

        .filter-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .filter-tag {
            font-size: 14px;
            font-weight: 500;
            padding: 7px 18px;
            border-radius: var(--radius-btn);
            color: var(--color-text-weak);
            background-color: transparent;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            cursor: pointer;
        }

        .filter-tag:hover {
            border-color: var(--color-hover-border);
            color: var(--color-secondary);
            background-color: rgba(56, 189, 248, 0.05);
        }

        .filter-tag.active {
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
        }

        .filter-count {
            font-size: 14px;
            color: var(--color-text-muted);
            white-space: nowrap;
            font-weight: 500;
        }

        /* News List */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .news-item {
            display: flex;
            gap: 24px;
            padding: 28px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .news-item:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .news-date {
            flex-shrink: 0;
            width: 72px;
            text-align: center;
            padding-top: 4px;
        }

        .news-date .day {
            display: block;
            font-size: 28px;
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-number);
            line-height: 1.2;
        }

        .news-date .month {
            display: block;
            font-size: 13px;
            color: var(--color-text-muted);
            font-weight: 500;
            letter-spacing: 1px;
        }

        .news-date .year {
            display: block;
            font-size: 12px;
            color: var(--color-text-muted);
        }

        .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .news-title {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-primary);
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }

        .news-title a:hover {
            color: var(--color-secondary);
        }

        .news-excerpt {
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .news-footer {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }

        .read-more:hover {
            color: var(--color-accent);
            gap: 10px;
        }

        .read-more .arrow {
            font-size: 18px;
            line-height: 1;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-weak);
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .page-link:hover {
            border-color: var(--color-hover-border);
            color: var(--color-secondary);
        }

        .page-link.active {
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
        }

        .page-link.prev,
        .page-link.next {
            width: auto;
            padding: 0 16px;
        }

        .page-link.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* Deep Content Section */
        .deep-content {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .deep-content-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
        }

        .deep-content-text {
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .deep-content-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 20px;
            line-height: 1.4;
        }

        .deep-content-text p {
            font-size: 16px;
            line-height: 1.95;
            color: var(--color-text-weak);
            margin-bottom: 16px;
        }

        .deep-content-text p:last-of-type {
            margin-bottom: 24px;
        }

        .deep-content-image {
            min-height: 400px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .deep-content-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.6) 0%, transparent 100%);
            border-radius: 0 0 var(--radius-img) var(--radius-img);
        }

        /* Stats Section */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }

        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }

        .stat-card:hover {
            border-color: rgba(56, 189, 248, 0.5);
            background-color: rgba(255, 255, 255, 0.08);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-number);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 15px;
            color: #94A3B8;
            font-weight: 500;
        }

        /* Hot Topics */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .topic-card {
            padding: 24px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            text-align: left;
        }

        .topic-card:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .topic-card .badge {
            margin-bottom: 12px;
        }

        .topic-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .topic-card p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .topic-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* Newsletter CTA */
        .newsletter-cta {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 70%, #0B1220 100%);
            border-radius: var(--radius-card);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .newsletter-cta::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .newsletter-cta .section-title {
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .newsletter-cta .section-subtitle {
            color: #94A3B8;
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .newsletter-form {
            display: flex;
            align-items: center;
            gap: 12px;
            max-width: 460px;
            margin: 0 auto;
        }

        .newsletter-form input {
            flex: 1;
            padding: 13px 20px;
            border-radius: var(--radius-input);
            background-color: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 15px;
            transition: var(--transition);
        }

        .newsletter-form input::placeholder {
            color: #64748B;
        }

        .newsletter-form input:focus {
            border-color: var(--color-secondary);
            outline: 3px solid rgba(56, 189, 248, 0.3);
            outline-offset: 2px;
            background-color: rgba(255, 255, 255, 0.15);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--color-hover-border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--color-primary);
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--color-secondary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background-color: rgba(56, 189, 248, 0.1);
            color: var(--color-secondary);
            transition: var(--transition);
            font-size: 18px;
            font-weight: 700;
            user-select: none;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background-color: var(--color-accent);
            color: #FFFFFF;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.9;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        /* Contact CTA */
        .contact-cta {
            text-align: center;
            padding: 56px 40px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
        }

        .contact-cta .section-title {
            margin-bottom: 12px;
        }

        .contact-cta .section-subtitle {
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .contact-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: #94A3B8;
            padding: 56px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            background-color: rgba(56, 189, 248, 0.2);
            color: var(--color-secondary);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--color-secondary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #64748B;
            line-height: 1.7;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-links a {
            font-size: 13px;
            color: #94A3B8;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 60px;
                --card-gap: 20px;
            }

            .hamburger {
                display: flex;
            }

            .nav-left,
            .nav-right {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                background-color: #FFFFFF;
                padding: 16px 24px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
                display: none;
                z-index: 999;
            }

            .nav-left.open,
            .nav-right.open {
                display: flex;
            }

            .nav-left {
                top: 60px;
            }

            .nav-right {
                top: auto;
            }

            .nav-wrap {
                flex-wrap: wrap;
                justify-content: space-between;
            }

            .nav-logo {
                order: 0;
            }

            .hamburger {
                order: 1;
            }

            .nav-left,
            .nav-right {
                position: static;
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 0;
                background: none;
                border: none;
                box-shadow: none;
                display: none;
                width: 100%;
                order: 2;
            }

            .nav-left.open,
            .nav-right.open {
                display: flex;
            }

            .nav-left a,
            .nav-right a {
                padding: 8px 0;
                font-size: 16px;
            }

            .nav-right {
                align-items: flex-start;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .deep-content-inner {
                grid-template-columns: 1fr;
            }

            .deep-content-image {
                min-height: 280px;
                order: -1;
            }

            .deep-content-text {
                padding: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --container-pad: 16px;
                --card-gap: 16px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .category-hero p {
                font-size: 16px;
            }

            .news-item {
                flex-direction: column;
                gap: 14px;
                padding: 20px;
            }

            .news-date {
                width: auto;
                display: flex;
                align-items: baseline;
                gap: 6px;
                text-align: left;
            }

            .news-date .day {
                font-size: 22px;
            }

            .news-date .month,
            .news-date .year {
                font-size: 13px;
            }

            .news-title {
                font-size: 18px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 32px;
            }

            .topics-grid {
                grid-template-columns: 1fr;
            }

            .newsletter-cta {
                padding: 40px 24px;
            }

            .newsletter-form {
                flex-direction: column;
            }

            .newsletter-form input {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                gap: 6px;
            }

            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .section-title {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 40px 0 32px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .news-item {
                padding: 16px;
            }

            .news-excerpt {
                font-size: 14px;
            }

            .pagination {
                gap: 4px;
            }

            .page-link {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }

            .page-link.prev,
            .page-link.next {
                padding: 0 10px;
            }

            .deep-content-text {
                padding: 24px;
            }

            .contact-cta {
                padding: 36px 20px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }

            .stat-card {
                padding: 20px 12px;
            }

            .stat-number {
                font-size: 26px;
            }
        }

        /* Utility */
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

/* roulang page: category2 */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 80px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        @media (max-width: 1024px) {
            :root {
                --section-gap: 60px;
                --card-gap: 20px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --container-pad: 16px;
                --card-gap: 16px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }

        .section-tight {
            padding: 56px 0;
        }

        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }

        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }
        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }
        .section-dark .section-subtitle {
            color: #94A3B8;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 16px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-left a,
        .nav-right a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }
        .nav-left a::after,
        .nav-right a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }
        .nav-left a:hover::after,
        .nav-right a:hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }
        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
        }
        .nav-logo {
            flex-shrink: 0;
            text-align: center;
            padding: 0 8px;
        }
        .nav-logo a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-radius: 10px;
            font-size: 18px;
            font-weight: 700;
        }
        .nav-cta {
            display: inline-block;
            background-color: var(--color-accent);
            color: #FFFFFF !important;
            font-weight: 600;
            padding: 10px 22px !important;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .nav-cta:hover {
            background-color: #FFFFFF;
            color: var(--color-accent) !important;
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }
        .nav-cta::after {
            display: none !important;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .breadcrumb-bar {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-weak);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-secondary);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb .sep {
            color: var(--color-text-muted);
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 600;
        }

        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background-color: var(--color-dark);
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(11, 18, 32, 0.65) 60%, rgba(56, 189, 248, 0.25) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }
        .page-hero .hero-sub {
            font-size: 18px;
            color: #CBD5E1;
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: #94A3B8;
            background-color: rgba(255, 255, 255, 0.06);
            padding: 6px 14px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .gallery-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .gallery-intro-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 20px;
            line-height: 1.35;
        }
        .gallery-intro-text p {
            font-size: 16px;
            color: var(--color-text-weak);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .gallery-intro-text .highlight {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .gallery-intro-image {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card-hover);
        }
        .gallery-intro-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: var(--radius-card);
            transition: var(--transition);
        }
        .gallery-intro-image:hover img {
            transform: scale(1.03);
        }

        .gallery-toolbar {
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            box-shadow: var(--shadow-card);
            margin-bottom: 40px;
        }
        .gallery-toolbar .filter-label {
            font-size: 14px;
            color: var(--color-text-weak);
            font-weight: 600;
        }
        .gallery-toolbar .filter-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .gallery-toolbar .filter-btn {
            font-size: 13px;
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            color: var(--color-text-weak);
            background-color: #FFFFFF;
            transition: var(--transition);
            white-space: nowrap;
        }
        .gallery-toolbar .filter-btn:hover,
        .gallery-toolbar .filter-btn.active {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            border-color: var(--color-secondary);
        }
        .gallery-toolbar .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-input);
            padding: 8px 16px;
            transition: var(--transition);
        }
        .gallery-toolbar .search-box:focus-within {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }
        .gallery-toolbar .search-box input {
            font-size: 14px;
            color: var(--color-text);
            width: 160px;
        }
        .gallery-toolbar .search-box input::placeholder {
            color: var(--color-text-muted);
        }

        .featured-gallery {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 32px;
            align-items: stretch;
            background-color: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .featured-gallery:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
        }
        .featured-gallery .featured-image {
            overflow: hidden;
            position: relative;
            min-height: 400px;
        }
        .featured-gallery .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition);
        }
        .featured-gallery:hover .featured-image img {
            transform: scale(1.04);
        }
        .featured-gallery .featured-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            z-index: 2;
        }
        .featured-gallery .featured-content {
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-gallery .featured-content h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .featured-gallery .featured-content p {
            font-size: 16px;
            color: var(--color-text-weak);
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .featured-gallery .featured-meta {
            display: flex;
            gap: 16px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .featured-gallery .featured-meta span {
            font-size: 13px;
            color: var(--color-text-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .featured-gallery .featured-content .btn-outline {
            align-self: flex-start;
        }

        .btn-primary,
        .btn-outline {
            display: inline-block;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            text-align: center;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            border: 2px solid transparent;
        }
        .btn-primary:hover {
            background-color: #FFFFFF;
            color: var(--color-accent);
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-secondary);
            border: 2px solid var(--color-secondary);
        }
        .btn-outline:hover {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .btn-primary:focus,
        .btn-outline:focus {
            outline: 3px solid rgba(56, 189, 248, 0.4);
            outline-offset: 2px;
        }

        .gallery-grid-section {
            background-color: transparent;
        }
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }
        .gallery-card {
            background-color: #FFFFFF;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .gallery-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-4px);
        }
        .gallery-card .card-image {
            overflow: hidden;
            position: relative;
            height: 220px;
        }
        .gallery-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition);
        }
        .gallery-card:hover .card-image img {
            transform: scale(1.05);
        }
        .gallery-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: rgba(15, 23, 42, 0.75);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            backdrop-filter: blur(4px);
            z-index: 2;
        }
        .gallery-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .gallery-card .card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .gallery-card .card-summary {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }
        .gallery-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 14px;
            border-top: 1px solid var(--color-border);
        }
        .gallery-card .card-date {
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .gallery-card .card-link {
            font-size: 13px;
            color: var(--color-secondary);
            font-weight: 600;
        }
        .gallery-card .card-link:hover {
            color: var(--color-accent);
        }

        .gallery-stats {
            background-color: var(--color-dark);
            color: #E2E8F0;
            padding: var(--section-gap) 0;
        }
        .gallery-stats .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .gallery-stats .stat-item {
            padding: 28px 20px;
            background-color: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .gallery-stats .stat-item:hover {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: rgba(56, 189, 248, 0.4);
        }
        .gallery-stats .stat-number {
            font-family: var(--font-number);
            font-size: 44px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .gallery-stats .stat-label {
            font-size: 15px;
            color: #94A3B8;
        }

        .gallery-tags-section {
            padding: var(--section-gap) 0;
        }
        .gallery-tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .gallery-tags-cloud .tag-item {
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            color: var(--color-text-weak);
            transition: var(--transition);
            font-weight: 500;
        }
        .gallery-tags-cloud .tag-item:hover {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .gallery-tags-cloud .tag-item.accent {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }

        .gallery-cta {
            background: linear-gradient(135deg, var(--color-dark) 0%, #1E3A5F 50%, rgba(56, 189, 248, 0.35) 100%);
            padding: 72px 0;
            color: #FFFFFF;
            border-radius: 0;
        }
        .gallery-cta .cta-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .gallery-cta h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .gallery-cta p {
            font-size: 16px;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .cta-form {
            background-color: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            padding: 32px;
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .cta-form .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 16px;
        }
        .cta-form input,
        .cta-form textarea {
            width: 100%;
            padding: 12px 18px;
            border-radius: var(--radius-input);
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            font-size: 14px;
            transition: var(--transition);
        }
        .cta-form input::placeholder,
        .cta-form textarea::placeholder {
            color: #94A3B8;
        }
        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
            background-color: rgba(255, 255, 255, 0.1);
        }
        .cta-form textarea {
            min-height: 100px;
            resize: vertical;
            margin-bottom: 16px;
        }
        .cta-form .btn-primary {
            width: 100%;
            padding: 14px 28px;
            font-size: 16px;
        }

        .faq-section {
            padding: var(--section-gap) 0;
        }
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--color-primary);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--color-secondary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(56, 189, 248, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-secondary);
            font-size: 16px;
            font-weight: 700;
            transition: var(--transition);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background-color: var(--color-secondary);
            color: #FFFFFF;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--color-text-weak);
            font-size: 15px;
            line-height: 1.85;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .site-footer {
            background-color: var(--color-dark);
            color: #CBD5E1;
            padding: 64px 0 32px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 40px;
            height: 40px;
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: #94A3B8;
        }
        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
        }
        .footer-bottom p {
            font-size: 13px;
            color: #64748B;
        }
        .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 13px;
            color: #64748B;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }

        @media (max-width: 1024px) {
            .nav-wrap {
                flex-wrap: wrap;
            }
            .hamburger {
                display: flex;
            }
            .nav-left,
            .nav-right {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background-color: #FFFFFF;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-card-hover);
                padding: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.35s ease, padding 0.35s ease;
                z-index: 999;
                border-radius: 0 0 var(--radius-card) var(--radius-card);
            }
            .nav-left.open,
            .nav-right.open {
                max-height: 400px;
                padding: 16px 24px;
            }
            .nav-left {
                top: calc(100% + 0px);
            }
            .nav-right {
                top: calc(100% + 0px);
            }
            .nav-left a,
            .nav-right a {
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid var(--color-border);
                font-size: 15px;
            }
            .nav-left a:last-child,
            .nav-right a:last-child {
                border-bottom: none;
            }
            .nav-logo {
                order: -1;
                flex-shrink: 1;
                text-align: left;
                flex: 1;
            }
            .hamburger {
                order: -2;
            }
            .gallery-intro {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .gallery-intro-image img {
                height: 300px;
            }
            .gallery-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .gallery-stats .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .gallery-cta .cta-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-hero h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 26px;
            }
            .page-hero {
                padding: 56px 0 48px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .gallery-grid {
                grid-template-columns: 1fr;
            }
            .gallery-toolbar {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px;
            }
            .gallery-toolbar .search-box {
                width: 100%;
                margin-left: 0;
            }
            .gallery-toolbar .search-box input {
                width: 100%;
            }
            .featured-gallery {
                grid-template-columns: 1fr;
            }
            .featured-gallery .featured-image {
                min-height: 240px;
            }
            .gallery-stats .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .gallery-stats .stat-number {
                font-size: 32px;
            }
            .cta-form .form-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .gallery-cta {
                padding: 48px 0;
            }
            .gallery-cta h2 {
                font-size: 24px;
            }
            .featured-gallery .featured-content {
                padding: 24px;
            }
        }

        @media (max-width: 520px) {
            .section-gap,
            :root {
                --section-gap: 40px;
            }
            .page-hero h1 {
                font-size: 25px;
            }
            .page-hero .hero-sub {
                font-size: 15px;
            }
            .gallery-card .card-title {
                font-size: 17px;
            }
            .gallery-stats .stats-grid {
                grid-template-columns: 1fr;
            }
            .gallery-intro-image img {
                height: 220px;
            }
            .gallery-toolbar .filter-group {
                gap: 6px;
            }
            .gallery-toolbar .filter-btn {
                font-size: 12px;
                padding: 6px 12px;
            }
            .cta-form {
                padding: 20px;
            }
            .featured-gallery .featured-content h3 {
                font-size: 21px;
            }
            .section-title {
                font-size: 23px;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 80px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }
        .section {
            padding: var(--section-gap) 0;
        }
        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }
        .section-tight {
            padding: 56px 0;
        }
        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }
        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }
        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }
        .section-dark .section-subtitle {
            color: #94A3B8;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 16px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-left a,
        .nav-right a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }
        .nav-left a::after,
        .nav-right a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }
        .nav-left a:hover::after,
        .nav-right a:hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }
        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .nav-logo {
            text-align: center;
            flex-shrink: 0;
        }
        .nav-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.3px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
        }
        .nav-cta {
            background-color: var(--color-accent);
            color: #FFFFFF !important;
            padding: 10px 20px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px !important;
            transition: var(--transition);
        }
        .nav-cta:hover {
            background-color: var(--color-primary);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(251, 146, 60, 0.3);
        }
        .nav-cta::after {
            display: none !important;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: transparent;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger:hover {
            border-color: var(--color-secondary);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 0;
            font-size: 14px;
            color: var(--color-text-weak);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-weak);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb span {
            color: var(--color-text-muted);
        }
        .breadcrumb .current {
            color: var(--color-secondary);
            font-weight: 500;
        }
        .hero-topics {
            background: linear-gradient(135deg, #0F172A 0%, #0B1220 45%, #1E293B 100%);
            color: #FFFFFF;
            padding: 80px 0 70px;
            position: relative;
            overflow: hidden;
        }
        .hero-topics::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.18) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-topics::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(251, 146, 60, 0.12) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-topics .container {
            position: relative;
            z-index: 2;
        }
        .hero-topics h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero-topics p {
            font-size: 18px;
            color: #94A3B8;
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 28px;
        }
        .hero-badge-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .hero-badge {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.15);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(56, 189, 248, 0.3);
            letter-spacing: 0.5px;
        }
        .hero-badge.orange {
            background-color: rgba(251, 146, 60, 0.15);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.3);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            border-color: var(--color-accent);
        }
        .btn-primary:hover {
            background-color: #FFFFFF;
            color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(251, 146, 60, 0.3);
        }
        .btn-secondary {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-secondary);
            border-color: var(--color-secondary);
        }
        .btn-outline:hover {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-dark {
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
        }
        .btn-dark:hover {
            background-color: #FFFFFF;
            color: var(--color-primary);
            transform: translateY(-2px);
        }
        .btn:focus,
        .btn:focus-visible {
            outline: 3px solid rgba(56, 189, 248, 0.5);
            outline-offset: 2px;
        }
        .featured-article {
            padding: 60px 0 40px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0;
            max-width: 820px;
            margin: 0 auto;
        }
        .article-meta-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            align-items: center;
        }
        .article-meta-row .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-row .meta-tag {
            background-color: rgba(56, 189, 248, 0.1);
            color: var(--color-secondary);
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            font-weight: 500;
            font-size: 12px;
        }
        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.4;
            margin: 36px 0 16px;
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.5;
            margin: 28px 0 12px;
        }
        .article-body p {
            font-size: 17px;
            line-height: 2.0;
            color: var(--color-text);
            margin-bottom: 18px;
        }
        .article-body .lead {
            font-size: 19px;
            line-height: 1.9;
            color: var(--color-primary);
            font-weight: 500;
            margin-bottom: 24px;
        }
        .article-figure {
            margin: 28px 0;
            text-align: center;
        }
        .article-figure img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
            border-radius: var(--radius-img);
            box-shadow: var(--shadow-card);
        }
        .article-figure figcaption {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 10px;
            line-height: 1.6;
        }
        .article-quote {
            background-color: rgba(56, 189, 248, 0.06);
            border-left: 4px solid var(--color-secondary);
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--color-primary);
            font-size: 16px;
            line-height: 1.9;
        }
        .article-highlight-list {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }
        .article-highlight-list h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 14px;
        }
        .article-highlight-list ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .article-highlight-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 15px;
            color: var(--color-text);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.7;
        }
        .article-highlight-list li:last-child {
            border-bottom: none;
        }
        .article-highlight-list li::before {
            content: '◆';
            color: var(--color-secondary);
            font-size: 10px;
            margin-top: 8px;
            flex-shrink: 0;
        }
        .topic-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }
        .topic-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .topic-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .topic-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }
        .topic-card:hover .topic-card-img img {
            transform: scale(1.05);
        }
        .topic-card-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .topic-card-category {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .topic-card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.45;
            margin-bottom: 10px;
        }
        .topic-card-excerpt {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.8;
            flex: 1;
            margin-bottom: 16px;
        }
        .topic-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--color-text-muted);
            border-top: 1px solid var(--color-border);
            padding-top: 14px;
        }
        .topic-card-link {
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        .topic-card-link:hover {
            color: var(--color-accent);
        }
        .stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-block {
            padding: 28px 20px;
            background-color: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            transition: var(--transition);
        }
        .stat-block:hover {
            border-color: var(--color-secondary);
            background-color: rgba(56, 189, 248, 0.06);
        }
        .stat-number {
            font-family: var(--font-number);
            font-size: 42px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 8px;
        }
        .stat-number.orange {
            color: var(--color-accent);
        }
        .stat-label {
            font-size: 14px;
            color: #94A3B8;
            font-weight: 500;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
        }
        .faq-item.active {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--color-primary);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--color-secondary);
        }
        .faq-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            border-radius: 50%;
            background-color: rgba(56, 189, 248, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-secondary);
            font-size: 18px;
            font-weight: 700;
            transition: var(--transition);
        }
        .faq-item.active .faq-icon {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.85;
        }
        .cta-section {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0B1220 100%);
            color: #FFFFFF;
            text-align: center;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            left: 50%;
            transform: translateX(-50%);
            width: 700px;
            height: 500px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 17px;
            color: #94A3B8;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.85;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .newsletter-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 32px auto 0;
            flex-wrap: wrap;
            justify-content: center;
        }
        .newsletter-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border-radius: var(--radius-input);
            background-color: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #FFFFFF;
            font-size: 15px;
            transition: var(--transition);
        }
        .newsletter-form input::placeholder {
            color: #94A3B8;
        }
        .newsletter-form input:focus {
            border-color: var(--color-secondary);
            outline: 3px solid rgba(56, 189, 248, 0.3);
            outline-offset: 2px;
            background-color: rgba(255, 255, 255, 0.12);
        }
        .site-footer {
            background-color: var(--color-primary);
            color: #CBD5E1;
            padding: 60px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            margin-top: 16px;
            max-width: 360px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--color-secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #64748B;
        }
        .footer-links {
            display: flex;
            gap: 16px;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 13px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }
        @media (max-width: 1024px) {
            .hamburger {
                display: flex;
            }
            .nav-left,
            .nav-right {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: #FFFFFF;
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1);
                z-index: 999;
                gap: 12px;
            }
            .nav-left.open,
            .nav-right.open {
                display: flex;
            }
            .nav-left {
                left: 0;
                top: 100%;
            }
            .nav-right {
                top: auto;
                left: 0;
                right: 0;
                position: absolute;
            }
            .nav-wrap {
                flex-wrap: wrap;
                justify-content: space-between;
            }
            .nav-logo {
                order: 2;
                flex: 1;
                text-align: center;
            }
            .hamburger {
                order: 1;
            }
            .nav-right {
                order: 3;
                display: none;
            }
            .nav-right.open {
                display: flex;
            }
            .nav-left.open {
                display: flex;
            }
            .hero-topics h1 {
                font-size: 36px;
            }
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-card-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .hero-topics {
                padding: 56px 0 48px;
            }
            .hero-topics h1 {
                font-size: 28px;
            }
            .hero-topics p {
                font-size: 15px;
            }
            .section-title {
                font-size: 24px;
            }
            .article-body h2 {
                font-size: 22px;
            }
            .article-body p {
                font-size: 16px;
            }
            .article-figure img {
                max-height: 280px;
            }
            .stats-band {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
        }
        @media (max-width: 520px) {
            .hero-topics h1 {
                font-size: 24px;
            }
            .hero-badge-row {
                gap: 6px;
            }
            .hero-badge {
                font-size: 11px;
                padding: 4px 10px;
            }
            .topic-card-body {
                padding: 16px 18px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .article-quote {
                padding: 16px 18px;
                font-size: 14px;
            }
            .article-highlight-list {
                padding: 18px 20px;
            }
        }

/* roulang page: category5 */
:root {
  --color-primary: #0F172A;
  --color-secondary: #38BDF8;
  --color-accent: #FB923C;
  --color-bg: #F8FAFC;
  --color-card: #FFFFFF;
  --color-dark: #0B1220;
  --color-text: #1E293B;
  --color-text-weak: #64748B;
  --color-text-muted: #94A3B8;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-hover-border: #38BDF8;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-input: 10px;
  --radius-img: 16px;
  --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
  --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
  --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
  --container-max: 1200px;
  --container-pad: 24px;
  --section-gap: 80px;
  --card-gap: 28px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-img);
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
  background: none;
}
button {
  cursor: pointer;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  width: 100%;
}
.section {
  padding: var(--section-gap) 0;
}
.section-dark {
  background-color: var(--color-dark);
  color: #E2E8F0;
}
.section-tight {
  padding: 56px 0;
}
.section-header {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}
.section-header.left {
  margin-left: 0;
  margin-right: auto;
  text-align: left;
}
.section-tag {
  display: inline-block;
  background-color: rgba(56, 189, 248, 0.12);
  color: var(--color-secondary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-btn);
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  border: 1px solid rgba(56, 189, 248, 0.25);
}
.section-tag.orange {
  background-color: rgba(251, 146, 60, 0.12);
  color: var(--color-accent);
  border-color: rgba(251, 146, 60, 0.25);
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.section-dark .section-title {
  color: #FFFFFF;
}
.section-subtitle {
  font-size: 17px;
  color: var(--color-text-weak);
  line-height: 1.8;
}
.section-dark .section-subtitle {
  color: #94A3B8;
}
/* Header Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 16px;
  position: relative;
}
.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
}
.nav-right {
  justify-content: flex-end;
}
.nav-left a,
.nav-right a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  position: relative;
  padding: 4px 2px;
  transition: var(--transition);
}
.nav-left a::after,
.nav-right a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
  border-radius: 2px;
}
.nav-left a:hover::after,
.nav-right a:hover::after,
.nav-left a.active::after,
.nav-right a.active::after {
  transform: scaleX(1);
}
.nav-left a:hover,
.nav-right a:hover,
.nav-left a.active,
.nav-right a.active {
  color: var(--color-secondary);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.nav-logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  color: #fff;
  border-radius: 12px;
  font-size: 20px;
  font-weight: 700;
}
.nav-cta {
  background-color: var(--color-accent);
  color: #fff !important;
  padding: 10px 22px !important;
  border-radius: var(--radius-btn);
  font-weight: 600;
  border: none;
  transition: var(--transition);
  display: inline-block;
}
.nav-cta:hover {
  background-color: #e67e22;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(251, 146, 60, 0.35);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  z-index: 1100;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}
/* Breadcrumb */
.breadcrumb-nav {
  margin-top: 28px;
  font-size: 14px;
  color: var(--color-text-weak);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumb-nav a {
  color: var(--color-text-weak);
  transition: var(--transition);
}
.breadcrumb-nav a:hover {
  color: var(--color-secondary);
}
.breadcrumb-nav .separator {
  color: var(--color-text-muted);
}
.breadcrumb-nav .current {
  color: var(--color-secondary);
  font-weight: 600;
}
/* Hero - Downloads */
.downloads-hero {
  background: linear-gradient(135deg, #0F172A 0%, #0B1220 55%, #1E293B 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: 80px 0 70px;
}
.downloads-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.2) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}
.downloads-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(251, 146, 60, 0.15) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}
.downloads-hero .container {
  position: relative;
  z-index: 1;
}
.downloads-hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.downloads-hero h1 span {
  background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.downloads-hero p {
  font-size: 19px;
  color: #CBD5E1;
  max-width: 680px;
  line-height: 1.85;
  margin-bottom: 32px;
}
.downloads-hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  border: none;
}
.btn-primary:hover {
  background-color: #e67e22;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(251, 146, 60, 0.4);
}
.btn-secondary {
  background-color: transparent;
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}
.btn-secondary:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-2px);
}
/* Filter toolbar */
.filter-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}
.filter-toolbar label {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 4px;
}
.filter-pill {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 8px 18px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.filter-pill:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  background-color: rgba(56, 189, 248, 0.06);
}
.filter-pill.active {
  background-color: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}
.filter-pill.orange-active {
  background-color: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(251, 146, 60, 0.3);
}
/* Download card list */
.download-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.download-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 22px 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.download-item:hover {
  border-color: var(--color-hover-border);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.download-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  font-weight: 700;
  color: #fff;
}
.download-icon.pdf {
  background: linear-gradient(135deg, #FB923C 0%, #E67E22 100%);
}
.download-icon.excel {
  background: linear-gradient(135deg, #34D399 0%, #059669 100%);
}
.download-icon.csv {
  background: linear-gradient(135deg, #38BDF8 0%, #0284C7 100%);
}
.download-icon.zip {
  background: linear-gradient(135deg, #A78BFA 0%, #7C3AED 100%);
}
.download-icon.doc {
  background: linear-gradient(135deg, #F472B6 0%, #DB2777 100%);
}
.download-body {
  flex: 1;
  min-width: 220px;
}
.download-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
  line-height: 1.4;
}
.download-body p {
  font-size: 14px;
  color: var(--color-text-weak);
  line-height: 1.65;
}
.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
}
.download-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.download-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-download {
  background-color: var(--color-primary);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: var(--transition);
  border: none;
}
.btn-download:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(56, 189, 248, 0.35);
}
/* Featured download cards */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}
.featured-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}
.featured-card:hover {
  border-color: var(--color-hover-border);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.featured-card .card-img {
  height: 180px;
  overflow: hidden;
  position: relative;
}
.featured-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: var(--transition);
}
.featured-card:hover .card-img img {
  transform: scale(1.05);
}
.featured-card .card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-btn);
  letter-spacing: 0.5px;
}
.featured-card .card-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.featured-card .card-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}
.featured-card .card-body p {
  font-size: 14px;
  color: var(--color-text-weak);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}
.featured-card .card-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
/* Stats dark section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--card-gap);
}
.stat-card {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: rgba(56, 189, 248, 0.45);
  background-color: rgba(255, 255, 255, 0.08);
}
.stat-card .stat-number {
  font-family: var(--font-number);
  font-size: 42px;
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1.2;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.stat-card .stat-number.orange {
  color: var(--color-accent);
}
.stat-card .stat-label {
  font-size: 15px;
  color: #94A3B8;
  font-weight: 500;
}
/* Process steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--card-gap);
}
.process-step {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
}
.process-step:hover {
  border-color: var(--color-hover-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.process-step .step-num {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-family: var(--font-number);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--color-text-weak);
  line-height: 1.7;
}
/* FAQ */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.faq-item:hover {
  border-color: var(--color-hover-border);
}
.faq-question {
  padding: 20px 26px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
  user-select: none;
}
.faq-question:hover {
  color: var(--color-secondary);
}
.faq-question .faq-arrow {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question .faq-arrow {
  transform: rotate(180deg);
  background-color: var(--color-secondary);
  color: #fff;
}
.faq-answer {
  padding: 0 26px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 26px 22px;
}
.faq-answer p {
  font-size: 15px;
  color: var(--color-text-weak);
  line-height: 1.8;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}
/* CTA */
.cta-section {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0B1220 100%);
  color: #fff;
  text-align: center;
}
.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.cta-section p {
  font-size: 17px;
  color: #CBD5E1;
  max-width: 600px;
  margin: 0 auto 28px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
/* Footer */
.site-footer {
  background-color: var(--color-dark);
  color: #CBD5E1;
  padding: 60px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 14px;
  color: #94A3B8;
  line-height: 1.8;
  margin-top: 16px;
  max-width: 300px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: #94A3B8;
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: var(--color-secondary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: #64748B;
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: #94A3B8;
  transition: var(--transition);
  font-size: 13px;
}
.footer-links a:hover {
  color: var(--color-secondary);
}
/* Responsive */
@media (max-width: 1024px) {
  .nav-wrap {
    flex-wrap: wrap;
  }
  .nav-left,
  .nav-right {
    gap: 14px;
  }
  .nav-left a,
  .nav-right a {
    font-size: 14px;
  }
  .nav-cta {
    padding: 8px 16px !important;
    font-size: 13px;
  }
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  :root {
    --section-gap: 48px;
    --container-pad: 16px;
    --card-gap: 16px;
  }
  .hamburger {
    display: flex;
  }
  .nav-left,
  .nav-right {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #fff;
    flex-direction: column;
    padding: 20px var(--container-pad);
    gap: 12px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
    z-index: 999;
  }
  .nav-left.open,
  .nav-right.open {
    display: flex;
  }
  .nav-left {
    order: 2;
  }
  .nav-right {
    order: 3;
  }
  .nav-logo {
    order: 1;
  }
  .hamburger {
    order: 0;
  }
  .nav-wrap {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
  .nav-logo {
    margin-left: 0;
  }
  .nav-left a,
  .nav-right a {
    font-size: 15px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
  }
  .downloads-hero h1 {
    font-size: 32px;
  }
  .downloads-hero p {
    font-size: 16px;
  }
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-card .stat-number {
    font-size: 32px;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .download-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .download-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .filter-toolbar {
    gap: 8px;
  }
  .filter-pill {
    padding: 6px 12px;
    font-size: 13px;
  }
  .site-footer {
    padding: 40px 0 20px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}
@media (max-width: 520px) {
  .downloads-hero h1 {
    font-size: 26px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
    font-size: 14px;
  }
  .downloads-hero .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .featured-card .card-img {
    height: 140px;
  }
  .download-item {
    padding: 16px;
  }
  .section-title {
    font-size: 24px;
  }
}

/* roulang page: category6 */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 80px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }

        .section {
            padding: var(--section-gap) 0;
        }
        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }
        .section-tight {
            padding: 56px 0;
        }
        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }
        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }
        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }
        .section-dark .section-subtitle {
            color: #94A3B8;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 16px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-left a,
        .nav-right a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }
        .nav-left a::after,
        .nav-right a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }
        .nav-left a:hover::after,
        .nav-right a:hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }
        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
        }
        .nav-cta {
            display: inline-block;
            background-color: var(--color-accent);
            color: #FFFFFF !important;
            padding: 10px 22px !important;
            border-radius: var(--radius-btn);
            font-weight: 600 !important;
            font-size: 14px !important;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(251, 146, 60, 0.3);
        }
        .nav-cta:hover {
            background-color: var(--color-primary) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(15, 23, 42, 0.25);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-logo {
            text-align: center;
            flex-shrink: 0;
            padding: 0 8px;
        }
        .nav-logo a {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #FFFFFF;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
            z-index: 1001;
        }
        .hamburger span {
            width: 24px;
            height: 2.5px;
            background-color: var(--color-primary);
            border-radius: 3px;
            transition: var(--transition);
            display: block;
        }
        .hamburger:hover span {
            background-color: var(--color-secondary);
        }

        /* Breadcrumb */
        .breadcrumb-wrapper {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--color-border);
            padding: 12px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-weak);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-weak);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb .sep {
            color: var(--color-text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            background-color: var(--color-dark);
            position: relative;
            overflow: hidden;
            padding: 60px 0 80px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            font-size: 42px;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            max-width: 800px;
        }
        .category-hero h1 .highlight {
            color: var(--color-secondary);
        }
        .category-hero p {
            font-size: 17px;
            color: #94A3B8;
            max-width: 720px;
            line-height: 1.8;
        }
        .category-hero .hero-meta {
            display: flex;
            gap: 24px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .category-hero .hero-meta span {
            color: #E2E8F0;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .category-hero .hero-meta .dot {
            width: 6px;
            height: 6px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
        }

        /* Filter Toolbar */
        .filter-toolbar {
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
            margin-top: -32px;
            position: relative;
            z-index: 2;
        }
        .filter-toolbar .filter-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .filter-toolbar .filter-label {
            font-size: 14px;
            color: var(--color-text-weak);
            font-weight: 600;
        }
        .filter-toolbar .filter-btn {
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-weak);
            background-color: var(--color-bg);
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .filter-toolbar .filter-btn:hover {
            border-color: var(--color-hover-border);
            color: var(--color-secondary);
            background-color: rgba(56, 189, 248, 0.06);
        }
        .filter-toolbar .filter-btn.active {
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
        }
        .filter-toolbar .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-input);
            padding: 8px 14px;
            transition: var(--transition);
        }
        .filter-toolbar .search-box:focus-within {
            border-color: var(--color-hover-border);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }
        .filter-toolbar .search-box input {
            width: 160px;
            font-size: 14px;
            color: var(--color-text);
            background: none;
        }
        .filter-toolbar .search-box input::placeholder {
            color: var(--color-text-muted);
        }
        .filter-toolbar .search-box .search-icon {
            color: var(--color-text-muted);
            font-size: 16px;
        }

        /* Video Horizontal Scroll */
        .video-scroll-section {
            padding-top: 40px;
        }
        .video-scroll-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 24px;
            gap: 16px;
            flex-wrap: wrap;
        }
        .video-scroll-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
        }
        .video-scroll-header .scroll-actions {
            display: flex;
            gap: 10px;
        }
        .video-scroll-header .scroll-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-text);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .video-scroll-header .scroll-btn:hover {
            border-color: var(--color-hover-border);
            color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .video-h-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding: 12px 4px 20px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--color-secondary) transparent;
        }
        .video-h-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .video-h-scroll::-webkit-scrollbar-track {
            background: transparent;
        }
        .video-h-scroll::-webkit-scrollbar-thumb {
            background: var(--color-secondary);
            border-radius: 10px;
        }
        .video-h-card {
            min-width: 320px;
            max-width: 320px;
            flex-shrink: 0;
            background-color: #FFFFFF;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            scroll-snap-align: start;
            cursor: pointer;
        }
        .video-h-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-4px);
        }
        .video-h-card .video-thumb {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            border-radius: 0;
        }
        .video-h-card .video-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }
        .video-h-card:hover .video-thumb img {
            transform: scale(1.05);
        }
        .video-h-card .play-overlay {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 52px;
            height: 52px;
            background-color: rgba(15, 23, 42, 0.7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 22px;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .video-h-card:hover .play-overlay {
            background-color: var(--color-secondary);
            transform: translate(-50%, -50%) scale(1.1);
        }
        .video-h-card .video-duration {
            position: absolute;
            bottom: 10px;
            right: 10px;
            background-color: rgba(15, 23, 42, 0.75);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 6px;
            letter-spacing: 0.5px;
        }
        .video-h-card .video-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
        }
        .video-h-card .video-info {
            padding: 18px 20px 20px;
        }
        .video-h-card .video-info h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .video-h-card .video-info .video-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .video-h-card .video-info .video-tags .vtag {
            font-size: 12px;
            color: var(--color-text-weak);
            background-color: var(--color-bg);
            padding: 3px 10px;
            border-radius: 6px;
            border: 1px solid var(--color-border);
        }
        .video-h-card .video-info .video-stats {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .video-h-card .video-info .video-stats span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Gallery Grid */
        .gallery-section {
            background-color: #FFFFFF;
        }
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .gallery-card {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            cursor: pointer;
            background-color: #FFFFFF;
        }
        .gallery-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-hover-border);
            transform: translateY(-4px);
        }
        .gallery-card .gallery-img {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            border-radius: 0;
        }
        .gallery-card .gallery-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }
        .gallery-card:hover .gallery-img img {
            transform: scale(1.06);
        }
        .gallery-card .gallery-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to bottom, transparent 40%, rgba(15, 23, 42, 0.8));
            display: flex;
            align-items: flex-end;
            padding: 16px;
            border-radius: 0;
        }
        .gallery-card .gallery-overlay .gallery-count {
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .gallery-card .gallery-info {
            padding: 16px 20px 20px;
        }
        .gallery-card .gallery-info h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 6px;
        }
        .gallery-card .gallery-info p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.6;
        }

        /* Featured Video */
        .featured-video-section {
            background-color: var(--color-dark);
        }
        .featured-video-section .section-title {
            color: #FFFFFF;
        }
        .featured-video-section .section-subtitle {
            color: #94A3B8;
        }
        .featured-video-wrap {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 28px;
            align-items: start;
        }
        .featured-main {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background-color: rgba(255, 255, 255, 0.03);
            transition: var(--transition);
            cursor: pointer;
        }
        .featured-main:hover {
            border-color: rgba(56, 189, 248, 0.4);
        }
        .featured-main .featured-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 0;
        }
        .featured-main .featured-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .featured-main:hover .featured-thumb img {
            transform: scale(1.03);
        }
        .featured-main .featured-play {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 68px;
            height: 68px;
            background-color: rgba(15, 23, 42, 0.75);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 30px;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .featured-main:hover .featured-play {
            background-color: var(--color-accent);
            transform: translate(-50%, -50%) scale(1.08);
        }
        .featured-main .featured-info {
            padding: 24px 28px 28px;
        }
        .featured-main .featured-info h3 {
            font-size: 24px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
            line-height: 1.35;
        }
        .featured-main .featured-info p {
            color: #94A3B8;
            font-size: 15px;
            line-height: 1.8;
        }
        .featured-side {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .featured-side .side-item {
            background-color: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 16px 18px;
            display: flex;
            gap: 14px;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .featured-side .side-item:hover {
            border-color: rgba(56, 189, 248, 0.4);
            background-color: rgba(255, 255, 255, 0.06);
        }
        .featured-side .side-item .side-thumb {
            width: 72px;
            height: 52px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .featured-side .side-item .side-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 8px;
        }
        .featured-side .side-item .side-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: #E2E8F0;
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .featured-side .side-item .side-info span {
            font-size: 12px;
            color: #64748B;
        }

        /* Stats Section */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background-color: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-hover-border);
        }
        .stat-card .stat-number {
            font-family: var(--font-number);
            font-size: 40px;
            font-weight: 700;
            color: var(--color-secondary);
            margin-bottom: 8px;
            letter-spacing: -1px;
            line-height: 1.2;
        }
        .stat-card .stat-number.orange {
            color: var(--color-accent);
        }
        .stat-card .stat-label {
            font-size: 15px;
            color: var(--color-text-weak);
            font-weight: 500;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1E293B 50%, var(--color-dark) 100%);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.15), transparent 70%);
            border-radius: 50%;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cta-section .cta-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        .cta-section .cta-text p {
            color: #94A3B8;
            font-size: 16px;
        }
        .cta-section .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            border-color: var(--color-accent);
            box-shadow: 0 4px 16px rgba(251, 146, 60, 0.35);
        }
        .btn-primary:hover {
            background-color: transparent;
            color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(251, 146, 60, 0.25);
        }
        .btn-secondary {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.35);
        }
        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-2px);
        }

        /* Pagination */
        .pagination-wrapper {
            display: flex;
            justify-content: center;
            margin-top: 36px;
        }
        .pagination {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .pagination a,
        .pagination span {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 500;
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            color: var(--color-text-weak);
            transition: var(--transition);
        }
        .pagination a:hover {
            border-color: var(--color-hover-border);
            color: var(--color-secondary);
            box-shadow: var(--shadow-card);
        }
        .pagination .page-current {
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
            font-weight: 600;
        }
        .pagination .page-dots {
            border: none;
            background: none;
            font-size: 16px;
            color: var(--color-text-muted);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: #94A3B8;
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 12px;
            max-width: 320px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 13px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }

        /* Mobile Nav */
        @media (max-width: 1024px) {
            .hamburger {
                display: flex;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-wrap {
                justify-content: space-between;
            }
            .nav-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                z-index: 1;
            }
            .nav-wrap.mobile-open .nav-left,
            .nav-wrap.mobile-open .nav-right {
                display: flex;
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background-color: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 14px;
                box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
                border-bottom: 1px solid var(--color-border);
                z-index: 1000;
                flex: none;
            }
            .nav-wrap.mobile-open .nav-right {
                top: auto;
                margin-top: 0;
                position: fixed;
                top: 280px;
            }
            .nav-wrap.mobile-open .nav-left a,
            .nav-wrap.mobile-open .nav-right a {
                font-size: 16px;
                width: 100%;
                padding: 6px 0;
            }
            .nav-wrap.mobile-open .nav-left a::after,
            .nav-wrap.mobile-open .nav-right a::after {
                display: none;
            }
            .nav-cta {
                display: inline-block !important;
                text-align: center;
                margin-top: 8px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .gallery-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-video-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .video-h-card {
                min-width: 260px;
                max-width: 260px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --container-pad: 16px;
                --card-gap: 16px;
            }
            .section {
                padding: var(--section-gap) 0;
            }
            .section-title {
                font-size: 24px;
            }
            .category-hero {
                padding: 40px 0 64px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 14px 16px;
            }
            .filter-toolbar .search-box input {
                width: 100%;
            }
            .filter-toolbar .search-box {
                width: 100%;
            }
            .gallery-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .video-scroll-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .video-h-card {
                min-width: 240px;
                max-width: 240px;
            }
            .cta-section .container {
                flex-direction: column;
                align-items: flex-start;
            }
            .featured-main .featured-info h3 {
                font-size: 19px;
            }
            .nav-wrap.mobile-open .nav-right {
                position: fixed;
                top: 260px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .video-h-card {
                min-width: 220px;
                max-width: 220px;
            }
            .breadcrumb {
                font-size: 12px;
                gap: 4px;
            }
        }

/* roulang page: category7 */
:root {
            --color-primary: #0F172A;
            --color-secondary: #38BDF8;
            --color-accent: #FB923C;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-dark: #0B1220;
            --color-text: #1E293B;
            --color-text-weak: #64748B;
            --color-text-muted: #94A3B8;
            --color-border: rgba(15, 23, 42, 0.08);
            --color-hover-border: #38BDF8;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --radius-img: 16px;
            --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --shadow-hero: 0 20px 60px rgba(15, 23, 42, 0.18);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-number: 'DIN Alternate', 'Oswald', 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --section-gap: 80px;
            --card-gap: 28px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
            width: 100%;
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background-color: var(--color-dark);
            color: #E2E8F0;
        }

        .section-tight {
            padding: 56px 0;
        }

        .section-header {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .section-header.left {
            margin-left: 0;
            margin-right: auto;
            text-align: left;
        }

        .section-tag {
            display: inline-block;
            background-color: rgba(56, 189, 248, 0.12);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }

        .section-tag.orange {
            background-color: rgba(251, 146, 60, 0.12);
            color: var(--color-accent);
            border-color: rgba(251, 146, 60, 0.25);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-dark .section-title {
            color: #FFFFFF;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            line-height: 1.8;
        }

        .section-dark .section-subtitle {
            color: #94A3B8;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 16px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-left a,
        .nav-right a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            position: relative;
            padding: 4px 2px;
            transition: var(--transition);
        }

        .nav-left a::after,
        .nav-right a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }

        .nav-left a:hover::after,
        .nav-right a:hover::after,
        .nav-left a.active::after,
        .nav-right a.active::after {
            transform: scaleX(1);
        }

        .nav-left a.active,
        .nav-right a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }

        .nav-logo {
            flex-shrink: 0;
            text-align: center;
        }

        .nav-logo a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: #FFFFFF;
            border-radius: 10px;
            font-size: 18px;
            font-weight: 700;
        }

        .nav-cta {
            display: inline-block;
            background-color: var(--color-accent);
            color: #FFFFFF !important;
            padding: 8px 20px !important;
            border-radius: var(--radius-btn);
            font-weight: 600 !important;
            font-size: 14px !important;
            transition: var(--transition);
        }

        .nav-cta:hover {
            background-color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(15, 23, 42, 0.15);
        }

        .nav-cta::after {
            display: none !important;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: transparent;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            padding: 12px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-weak);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-weak);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        .breadcrumb .separator {
            color: var(--color-text-muted);
            font-size: 12px;
        }

        /* Hero Banner */
        .category-hero {
            position: relative;
            padding: 72px 0 60px;
            background-color: var(--color-primary);
            background-image: linear-gradient(140deg, rgba(15, 23, 42, 0.92) 0%, rgba(56, 189, 248, 0.65) 62%, rgba(15, 23, 42, 0.95) 100%), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #FFFFFF;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 18, 32, 0.35);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(56, 189, 248, 0.2);
            border: 1px solid rgba(56, 189, 248, 0.4);
            color: #7DD3FC;
            font-size: 14px;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 13px;
        }

        .category-hero h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.25;
            color: #FFFFFF;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .category-hero .hero-desc {
            font-size: 18px;
            color: #CBD5E1;
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: none;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
        }

        .btn-primary:hover {
            background-color: #FFFFFF;
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(251, 146, 60, 0.35);
        }

        .btn-secondary {
            background-color: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.35);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-2px);
        }

        .btn:focus,
        .nav-cta:focus,
        .hamburger:focus {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        /* Intro section */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .intro-text {
            font-size: 16px;
            color: var(--color-text-weak);
            line-height: 1.9;
        }

        .intro-text p {
            margin-bottom: 16px;
        }

        .intro-text strong {
            color: var(--color-primary);
            font-weight: 600;
        }

        .intro-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
        }

        .intro-stat {
            text-align: center;
        }

        .intro-stat .stat-number {
            font-family: var(--font-number);
            font-size: 32px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.2;
            display: block;
            margin-bottom: 6px;
        }

        .intro-stat .stat-label {
            font-size: 13px;
            color: var(--color-text-weak);
            font-weight: 500;
            line-height: 1.5;
        }

        /* Filter toolbar */
        .filter-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            padding: 16px 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            margin-bottom: 32px;
        }

        .filter-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-tab {
            padding: 7px 18px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-weak);
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .filter-tab:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }

        .filter-tab.active {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            border-color: var(--color-secondary);
        }

        .filter-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--color-bg);
            border-radius: var(--radius-input);
            padding: 8px 14px;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .filter-search:focus-within {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }

        .filter-search input {
            flex: 1;
            min-width: 160px;
            font-size: 14px;
            color: var(--color-text);
            background: transparent;
            border: none;
        }

        .filter-search input::placeholder {
            color: var(--color-text-muted);
        }

        .filter-search i {
            color: var(--color-text-muted);
            font-size: 14px;
        }

        /* FAQ accordion */
        .faq-wrapper {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-item.open {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
        }

        .faq-question:hover {
            background-color: rgba(56, 189, 248, 0.03);
        }

        .faq-question-text {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.6;
            flex: 1;
        }

        .faq-toggle-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background-color: var(--color-bg);
            color: var(--color-text-weak);
            font-size: 14px;
            transition: var(--transition);
        }

        .faq-item.open .faq-toggle-icon {
            background-color: var(--color-secondary);
            color: #FFFFFF;
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.9;
        }

        .faq-answer-inner p {
            margin-bottom: 12px;
        }

        .faq-answer-inner a {
            color: var(--color-secondary);
            font-weight: 500;
            text-decoration: underline;
        }

        /* Topic tags */
        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-weak);
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            cursor: pointer;
        }

        .topic-tag:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-card);
        }

        .topic-tag i {
            font-size: 12px;
            color: var(--color-accent);
        }

        /* Form section */
        .form-card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            padding: 48px;
            box-shadow: var(--shadow-card-hover);
            border: 1px solid var(--color-border);
            max-width: 640px;
            margin: 0 auto;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-input);
            border: 1px solid var(--color-border);
            background-color: var(--color-bg);
            font-size: 15px;
            color: var(--color-text);
            transition: var(--transition);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
            background-color: #FFFFFF;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--color-text-muted);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 120px;
        }

        .form-submit-btn {
            width: 100%;
            padding: 14px 28px;
            background-color: var(--color-accent);
            color: #FFFFFF;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .form-submit-btn:hover {
            background-color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(251, 146, 60, 0.3);
        }

        .form-note {
            text-align: center;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 14px;
        }

        /* Quick help cards */
        .quick-help-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }

        .quick-help-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .quick-help-card:hover {
            border-color: var(--color-hover-border);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .quick-help-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background-color: rgba(56, 189, 248, 0.1);
            color: var(--color-secondary);
            font-size: 20px;
        }

        .quick-help-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .quick-help-info p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .quick-help-info a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .quick-help-info a:hover {
            color: var(--color-accent);
        }

        /* CTA section */
        .cta-section {
            background-color: var(--color-dark);
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(56, 189, 248, 0.55) 55%, rgba(15, 23, 42, 0.95) 100%), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            color: #FFFFFF;
            text-align: center;
            padding: 72px 0;
        }

        .cta-section .section-title {
            color: #FFFFFF;
        }

        .cta-section .section-subtitle {
            color: #CBD5E1;
            margin: 0 auto 32px;
            max-width: 560px;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-dark);
            color: #94A3B8;
            padding: 56px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--color-secondary);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: #94A3B8;
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-wrap {
                flex-wrap: wrap;
            }
            .nav-logo {
                order: 2;
                flex: 1;
                text-align: center;
            }
            .nav-left {
                order: 1;
                flex: 1;
                gap: 12px;
            }
            .nav-right {
                order: 3;
                flex: 1;
                gap: 12px;
            }
            .nav-left a,
            .nav-right a {
                font-size: 14px;
            }
            .nav-cta {
                padding: 6px 14px !important;
                font-size: 13px !important;
            }
            .intro-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --container-pad: 16px;
                --card-gap: 16px;
            }
            .hamburger {
                display: flex;
                position: absolute;
                left: 0;
                top: 50%;
                transform: translateY(-50%);
                z-index: 1002;
            }
            .nav-wrap {
                padding: 14px 0;
                gap: 8px;
            }
            .nav-left,
            .nav-right {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: rgba(255, 255, 255, 0.98);
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 24px;
                z-index: 1001;
            }
            .nav-left.open,
            .nav-right.open {
                display: flex;
            }
            .nav-left a,
            .nav-right a {
                font-size: 18px;
                padding: 8px 12px;
            }
            .nav-cta {
                font-size: 16px !important;
                padding: 10px 28px !important;
            }
            .nav-logo {
                flex: 1;
                text-align: center;
                margin: 0 auto;
            }
            .nav-logo a {
                font-size: 18px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 8px;
            }
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .hero-desc {
                font-size: 16px;
            }
            .section-title {
                font-size: 26px;
            }
            .intro-stats {
                grid-template-columns: repeat(3, 1fr);
                padding: 20px 14px;
            }
            .intro-stat .stat-number {
                font-size: 24px;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
                padding: 14px;
            }
            .filter-search input {
                min-width: 0;
                width: 100%;
            }
            .faq-question {
                padding: 16px 18px;
            }
            .faq-question-text {
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .form-card {
                padding: 28px 20px;
            }
            .quick-help-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                text-align: left;
            }
            .footer-links {
                gap: 12px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 26px;
            }
            .intro-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
                padding: 16px 10px;
            }
            .intro-stat .stat-number {
                font-size: 20px;
            }
            .intro-stat .stat-label {
                font-size: 11px;
            }
            .topic-tags {
                gap: 6px;
            }
            .topic-tag {
                padding: 6px 12px;
                font-size: 12px;
            }
            .filter-tabs {
                gap: 4px;
            }
            .filter-tab {
                padding: 5px 12px;
                font-size: 12px;
            }
        }