/* roulang page: index */
:root {
        --primary: #0f172a;
        --primary-light: #1e293b;
        --primary-dark: #020617;
        --accent: #f59e0b;
        --accent-light: #fbbf24;
        --accent-dark: #d97706;
        --danger: #e94560;
        --bg: #f8fafc;
        --bg-alt: #f1f5f9;
        --white: #ffffff;
        --text: #0f172a;
        --text-secondary: #475569;
        --text-muted: #94a3b8;
        --border: #e2e8f0;
        --radius: 16px;
        --radius-sm: 8px;
        --radius-lg: 24px;
        --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
        --shadow: 0 10px 40px rgba(15, 23, 42, 0.08);
        --shadow-lg: 0 24px 80px rgba(15, 23, 42, 0.12);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --container-width: 1200px;
        --header-height: 80px;
    }

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

    html {
        scroll-behavior: smooth;
        font-size: 16px;
    }

    body {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        line-height: 1.7;
        color: var(--text);
        background-color: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

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

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

    a:hover {
        color: var(--accent);
    }

    ul,
    ol {
        list-style: none;
        padding: 0;
        margin: 0;
    }

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

    button:focus,
    a:focus {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }

    .container {
        max-width: var(--container-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    .section {
        padding: 100px 0;
        position: relative;
    }

    .section-alt {
        background-color: var(--bg-alt);
    }

    .section-header {
        text-align: center;
        max-width: 720px;
        margin: 0 auto 60px;
    }

    .section-tag {
        display: inline-block;
        padding: 6px 18px;
        background: rgba(245, 158, 11, 0.1);
        color: var(--accent-dark);
        border-radius: 999px;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 2px;
        text-transform: uppercase;
        margin-bottom: 16px;
        border: 1px solid rgba(245, 158, 11, 0.2);
    }

    .section-header h2 {
        font-size: 40px;
        font-weight: 800;
        line-height: 1.2;
        color: var(--primary);
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }

    .section-header p {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.8;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 999px;
        font-size: 15px;
        font-weight: 600;
        cursor: pointer;
        transition: var(--transition);
        border: 2px solid transparent;
        line-height: 1.4;
    }

    .btn-primary {
        background: var(--accent);
        color: var(--primary-dark);
        border-color: var(--accent);
        box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
    }

    .btn-primary:hover {
        background: var(--accent-light);
        border-color: var(--accent-light);
        color: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 30px rgba(245, 158, 11, 0.4);
    }

    .btn-outline {
        background: transparent;
        color: var(--white);
        border-color: rgba(255, 255, 255, 0.5);
    }

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

    .btn-lg {
        padding: 16px 40px;
        font-size: 16px;
    }

    .btn-sm {
        padding: 8px 20px;
        font-size: 14px;
    }

    .btn-block {
        width: 100%;
        text-align: center;
    }

    .badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 14px;
        border-radius: 999px;
        font-size: 12px;
        font-weight: 600;
        letter-spacing: 0.5px;
    }

    .badge-accent {
        background: rgba(245, 158, 11, 0.15);
        color: var(--accent-light);
        border: 1px solid rgba(245, 158, 11, 0.3);
    }

    .badge-dark {
        background: var(--primary);
        color: var(--white);
    }

    .badge-category {
        background: rgba(15, 23, 42, 0.08);
        color: var(--primary);
        border: 1px solid rgba(15, 23, 42, 0.1);
    }

    .status-dot {
        width: 8px;
        height: 8px;
        background: #22c55e;
        border-radius: 50%;
        display: inline-block;
        box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.3);
        animation: pulse 2s infinite;
    }

    @keyframes pulse {
        0%,
        100% {
            opacity: 1;
            transform: scale(1);
        }
        50% {
            opacity: 0.7;
            transform: scale(0.85);
        }
    }

    /* ===== Header / Nav ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(15, 23, 42, 0.9);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        transition: var(--transition);
    }

    .site-header.scrolled {
        background: rgba(15, 23, 42, 0.98);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-height);
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 12px;
        text-decoration: none;
    }

    .brand-icon {
        width: 42px;
        height: 42px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary-dark);
        font-size: 20px;
        box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
    }

    .brand-text {
        font-size: 22px;
        font-weight: 800;
        color: var(--white);
        letter-spacing: -0.5px;
        white-space: nowrap;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .nav-link {
        padding: 10px 20px;
        color: rgba(255, 255, 255, 0.75);
        font-size: 15px;
        font-weight: 500;
        border-radius: 999px;
        transition: var(--transition);
        text-decoration: none;
        position: relative;
    }

    .nav-link:hover {
        color: var(--white);
        background: rgba(255, 255, 255, 0.08);
    }

    .nav-link.active {
        color: var(--white);
        background: rgba(245, 158, 11, 0.15);
        font-weight: 600;
    }

    .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--accent);
        border-radius: 2px;
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 14px;
    }

    .nav-toggle {
        display: none;
        background: transparent;
        color: var(--white);
        font-size: 24px;
        padding: 8px;
        border-radius: 8px;
        cursor: pointer;
        transition: var(--transition);
    }

    .nav-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .mobile-menu {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--primary);
        padding: 20px 24px;
        flex-direction: column;
        gap: 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        z-index: 999;
    }

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

    .mobile-link {
        padding: 14px 16px;
        color: rgba(255, 255, 255, 0.8);
        font-size: 16px;
        font-weight: 500;
        border-radius: 12px;
        transition: var(--transition);
    }

    .mobile-link:hover,
    .mobile-link.active {
        background: rgba(255, 255, 255, 0.08);
        color: var(--white);
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 720px;
        display: flex;
        align-items: center;
        background: linear-gradient(135deg, rgba(2, 6, 23, 0.92) 0%, rgba(15, 23, 42, 0.85) 50%, rgba(30, 41, 59, 0.8) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        color: var(--white);
        padding: 120px 0 80px;
        overflow: hidden;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: -20%;
        right: -10%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(245, 158, 11, 0.15), transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }

    .hero::after {
        content: '';
        position: absolute;
        bottom: -30%;
        left: -10%;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(233, 69, 96, 0.12), transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }

    .hero-content {
        position: relative;
        z-index: 1;
        max-width: 720px;
    }

    .hero .badge-accent {
        margin-bottom: 20px;
    }

    .hero-logo {
        font-size: 64px;
        font-weight: 900;
        line-height: 1.1;
        color: var(--white);
        margin-bottom: 8px;
        letter-spacing: -1px;
        text-shadow: 0 2px 40px rgba(245, 158, 11, 0.3);
    }

    .hero-title {
        font-size: 48px;
        font-weight: 800;
        line-height: 1.2;
        color: var(--white);
        margin-bottom: 20px;
        letter-spacing: -0.5px;
    }

    .hero-subtitle {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 36px;
        line-height: 1.7;
        max-width: 480px;
    }

    .hero-actions {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
        margin-bottom: 56px;
    }

    .hero-stats {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 36px;
        max-width: 540px;
    }

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

    .stat-number {
        font-size: 32px;
        font-weight: 800;
        color: var(--accent-light);
        display: block;
        line-height: 1.1;
    }

    .stat-label {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.6);
        display: block;
        margin-top: 6px;
    }

    /* ===== Intro ===== */
    .intro-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
    }

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

    .intro-image img {
        width: 100%;
        min-height: 360px;
        object-fit: cover;
    }

    .intro-image::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.4));
        border-radius: var(--radius-lg);
    }

    .intro-content {
        padding: 20px 0;
    }

    .intro-content h3 {
        font-size: 28px;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 20px;
        line-height: 1.4;
    }

    .intro-content p {
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.9;
        margin-bottom: 24px;
    }

    .feature-list {
        margin-top: 24px;
    }

    .feature-list li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 10px 0;
        color: var(--text);
        font-size: 15px;
        font-weight: 500;
    }

    .feature-list li i {
        color: var(--accent);
        font-size: 18px;
        margin-top: 3px;
        flex-shrink: 0;
    }

    /* ===== Categories ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
        margin-top: 40px;
    }

    .category-card {
        background: var(--white);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: var(--transition);
        border: 1px solid var(--border);
        display: flex;
        flex-direction: column;
    }

    .category-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(245, 158, 11, 0.3);
    }

    .category-card .card-img {
        position: relative;
        height: 220px;
        overflow: hidden;
    }

    .category-card .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.6s ease;
    }

    .category-card:hover .card-img img {
        transform: scale(1.06);
    }

    .category-card .card-img::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, 0.5));
    }

    .category-card .card-body {
        padding: 28px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .category-card h3 {
        font-size: 20px;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 12px;
    }

    .category-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        flex: 1;
        margin-bottom: 20px;
    }

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

    .card-link:hover {
        gap: 10px;
        color: var(--accent);
    }

    .card-icon {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        margin-bottom: 16px;
        background: rgba(245, 158, 11, 0.1);
        color: var(--accent-dark);
    }

    /* ===== Latest News ===== */
    .news-list {
        display: flex;
        flex-direction: column;
        gap: 24px;
        max-width: 860px;
        margin: 0 auto;
    }

    .news-item {
        background: var(--white);
        border-radius: var(--radius);
        padding: 32px 36px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }

    .news-item::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 3px;
        background: var(--accent);
        opacity: 0;
        transition: var(--transition);
    }

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

    .news-item:hover::before {
        opacity: 1;
    }

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

    .news-meta time {
        font-size: 13px;
        color: var(--text-muted);
    }

    .news-item h3 {
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 8px;
        line-height: 1.5;
    }

    .news-item h3 a {
        color: var(--primary);
    }

    .news-item h3 a:hover {
        color: var(--accent);
    }

    .news-item p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
        margin-bottom: 12px;
    }

    .read-more {
        font-size: 13px;
        font-weight: 600;
        color: var(--accent-dark);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition);
    }

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

    .empty-state {
        text-align: center;
        padding: 60px 20px;
        color: var(--text-muted);
    }

    .empty-state i {
        font-size: 48px;
        margin-bottom: 16px;
        display: block;
    }

    /* ===== Stats / Process ===== */
    .stats-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        color: var(--white);
        padding: 100px 0;
        position: relative;
        overflow: hidden;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(245, 158, 11, 0.1), transparent 70%);
    }

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

    .stats-card {
        padding: 32px 20px;
        border-radius: var(--radius);
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.06);
        transition: var(--transition);
    }

    .stats-card:hover {
        background: rgba(255, 255, 255, 0.08);
        transform: translateY(-4px);
    }

    .stats-card i {
        font-size: 32px;
        color: var(--accent);
        margin-bottom: 16px;
        display: block;
    }

    .stats-card .num {
        font-size: 40px;
        font-weight: 800;
        display: block;
        line-height: 1.2;
        margin-bottom: 6px;
        color: var(--white);
    }

    .stats-card .label {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.6);
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 820px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

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

    .faq-item:hover {
        border-color: rgba(245, 158, 11, 0.2);
    }

    .faq-question {
        width: 100%;
        padding: 22px 28px;
        background: transparent;
        color: var(--text);
        font-size: 16px;
        font-weight: 600;
        text-align: left;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        transition: var(--transition);
    }

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

    .faq-question i {
        font-size: 14px;
        transition: transform 0.3s ease;
        color: var(--text-muted);
        flex-shrink: 0;
    }

    .faq-item.active .faq-question i {
        transform: rotate(180deg);
        color: var(--accent);
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
        padding: 0 28px;
        border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
        max-height: 300px;
        padding: 18px 28px;
        border-top-color: var(--border);
    }

    .faq-answer p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.8;
    }

    /* ===== CTA ===== */
    .cta {
        background: linear-gradient(135deg, rgba(2, 6, 23, 0.9), rgba(30, 41, 59, 0.9)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        color: var(--white);
        text-align: center;
        padding: 100px 0;
        position: relative;
        overflow: hidden;
    }

    .cta::before {
        content: '';
        position: absolute;
        top: -50%;
        left: 50%;
        transform: translateX(-50%);
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(245, 158, 11, 0.12), transparent 70%);
    }

    .cta h2 {
        font-size: 36px;
        font-weight: 800;
        margin-bottom: 16px;
        position: relative;
    }

    .cta p {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.7);
        max-width: 500px;
        margin: 0 auto 36px;
        position: relative;
    }

    .cta .btn {
        position: relative;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--primary-dark);
        color: rgba(255, 255, 255, 0.7);
        padding: 60px 0 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 48px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .brand-text {
        font-size: 24px;
        color: var(--white);
        font-weight: 800;
    }

    .footer-brand p {
        margin-top: 16px;
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.5);
        max-width: 280px;
    }

    .footer-links h4,
    .footer-contact h4 {
        color: var(--white);
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 20px;
    }

    .footer-links a {
        display: block;
        padding: 6px 0;
        color: rgba(255, 255, 255, 0.5);
        font-size: 14px;
        transition: var(--transition);
    }

    .footer-links a:hover {
        color: var(--accent);
        padding-left: 6px;
    }

    .footer-contact p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.5);
        line-height: 1.8;
    }

    .footer-bottom {
        padding: 24px 0;
        text-align: center;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.3);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .section {
            padding: 80px 0;
        }

        .hero {
            min-height: 600px;
            padding: 100px 0 60px;
        }

        .hero-logo {
            font-size: 48px;
        }

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

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

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

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

        .intro-grid {
            gap: 40px;
        }
    }

    @media (max-width: 768px) {
        .container {
            padding: 0 20px;
        }

        .section {
            padding: 64px 0;
        }

        .section-header h2 {
            font-size: 30px;
        }

        .main-nav {
            display: none;
        }

        .nav-toggle {
            display: inline-flex;
        }

        .header-actions .btn {
            display: none;
        }

        .hero {
            min-height: 500px;
            padding: 100px 0 50px;
        }

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

        .hero-title {
            font-size: 28px;
        }

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

        .hero-actions {
            flex-direction: column;
            align-items: flex-start;
        }

        .hero-actions .btn {
            width: 100%;
        }

        .hero-stats {
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .stat-number {
            font-size: 24px;
        }

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

        .intro-image img {
            min-height: 240px;
        }

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

        .category-card .card-img {
            height: 180px;
        }

        .news-item {
            padding: 24px;
        }

        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .stats-card {
            padding: 24px 16px;
        }

        .stats-card .num {
            font-size: 28px;
        }

        .faq-question {
            padding: 18px;
            font-size: 14px;
        }

        .faq-answer.active {
            padding: 14px 18px;
        }

        .cta {
            padding: 64px 0;
        }

        .cta h2 {
            font-size: 28px;
        }

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

    @media (max-width: 520px) {
        .brand-text {
            font-size: 18px;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 16px;
            border-radius: 10px;
        }

        .hero-stats {
            gap: 12px;
        }

        .stat-number {
            font-size: 20px;
        }

        .stat-label {
            font-size: 12px;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-size: 26px;
        }

        .btn-lg {
            padding: 14px 28px;
            font-size: 15px;
        }

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

        .category-card .card-body {
            padding: 20px;
        }

        .news-item {
            padding: 20px;
        }

        .news-item h3 {
            font-size: 16px;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #1a1f3a;
            --primary-light: #232a4d;
            --primary-dark: #12172c;
            --accent: #f0a500;
            --accent-hover: #d4922e;
            --accent-light: #fff3d6;
            --bg: #f5f7fb;
            --bg-white: #ffffff;
            --bg-light: #eef1f7;
            --text: #1a1f3a;
            --text-muted: #5b6b85;
            --border: #e3e8f0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(26, 31, 58, 0.06);
            --shadow-md: 0 8px 30px rgba(26, 31, 58, 0.10);
            --shadow-lg: 0 18px 48px rgba(26, 31, 58, 0.15);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --container-max: 1200px;
        }

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

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 28px;
        }

        .section {
            padding: 90px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-light);
            color: var(--accent-hover);
            font-size: 14px;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-tag i {
            font-size: 13px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.8;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(227, 232, 240, 0.8);
            box-shadow: 0 4px 24px rgba(26, 31, 58, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 76px;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: var(--accent);
            font-size: 18px;
            font-weight: 800;
            border-radius: 12px;
            box-shadow: 0 4px 14px rgba(26, 31, 58, 0.2);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 auto;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 40px;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-light);
        }

        .nav-link.active {
            color: var(--accent-hover);
            background: var(--accent-light);
            font-weight: 700;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 12px 30px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 40px;
            transition: var(--transition);
            cursor: pointer;
            line-height: 1.4;
            border: none;
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent) 0%, #d4922e 100%);
            color: #fff;
            box-shadow: 0 6px 20px rgba(240, 165, 0, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(240, 165, 0, 0.4);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.8);
            color: #fff;
        }

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

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(26, 31, 58, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(26, 31, 58, 0.35);
            color: #fff;
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* Category Banner */
        .category-banner {
            position: relative;
            padding: 120px 0 90px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(18, 23, 44, 0.9) 0%, rgba(26, 31, 58, 0.7) 100%);
            z-index: 1;
        }

        .category-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(240, 165, 0, 0.2);
            border: 1px solid rgba(240, 165, 0, 0.5);
            color: var(--accent);
            font-size: 14px;
            font-weight: 700;
            padding: 8px 20px;
            border-radius: 40px;
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }

        .banner-tag i {
            font-size: 14px;
        }

        .category-banner h1 {
            font-size: 48px;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -1px;
        }

        .category-banner .banner-desc {
            font-size: 17px;
            max-width: 560px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            line-height: 1.9;
        }

        .banner-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .banner-stats {
            display: flex;
            align-items: center;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            flex-wrap: wrap;
        }

        .banner-stat-item {
            text-align: center;
        }

        .banner-stat-item .num {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .banner-stat-item .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* Category Cards */
        .category-cards .cell {
            margin-bottom: 24px;
        }

        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 28px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
            background: var(--primary);
        }

        .category-card .icon {
            width: 64px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-light);
            color: var(--accent-hover);
            border-radius: 16px;
            font-size: 26px;
            margin-bottom: 18px;
            transition: var(--transition);
        }

        .category-card:hover .icon {
            background: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }

        .category-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
            transition: var(--transition);
        }

        .category-card:hover h3 {
            color: #fff;
        }

        .category-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 14px;
            line-height: 1.6;
            transition: var(--transition);
        }

        .category-card:hover p {
            color: rgba(255, 255, 255, 0.7);
        }

        .category-card .link-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-hover);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            opacity: 0;
            transform: translateY(6px);
            transition: var(--transition);
        }

        .category-card:hover .link-more {
            opacity: 1;
            transform: translateY(0);
            color: var(--accent);
        }

        /* Latest Articles */
        .latest-section {
            background: var(--bg);
        }

        .article-cards .cell {
            margin-bottom: 28px;
        }

        .article-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .article-card .cover {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .article-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .article-card:hover .cover img {
            transform: scale(1.05);
        }

        .article-card .cover .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(26, 31, 58, 0.9);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            backdrop-filter: blur(8px);
        }

        .article-card .body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card .meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .article-card .meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--primary);
        }

        .article-card h3 a:hover {
            color: var(--accent-hover);
        }

        .article-card .excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

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

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

        /* Ranking */
        .ranking-section {
            background: var(--primary);
            position: relative;
            overflow: hidden;
        }

        .ranking-section::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 500px;
            height: 500px;
            background: rgba(240, 165, 0, 0.1);
            border-radius: 50%;
            filter: blur(60px);
        }

        .ranking-section .section-head h2 {
            color: #fff;
        }

        .ranking-section .section-head p {
            color: rgba(255, 255, 255, 0.6);
        }

        .ranking-section .section-tag {
            background: rgba(240, 165, 0, 0.2);
            color: var(--accent);
        }

        .ranking-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .ranking-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 14px;
            padding: 20px 24px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: var(--transition);
            backdrop-filter: blur(8px);
        }

        .ranking-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(6px);
            border-color: rgba(240, 165, 0, 0.3);
        }

        .ranking-num {
            font-size: 28px;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.25);
            min-width: 56px;
            text-align: center;
            letter-spacing: -1px;
            line-height: 1;
        }

        .ranking-item:first-child .ranking-num {
            color: var(--accent);
        }

        .ranking-item:nth-child(2) .ranking-num {
            color: #c0c9d8;
        }

        .ranking-item:nth-child(3) .ranking-num {
            color: #a06a3a;
        }

        .ranking-info {
            flex: 1;
        }

        .ranking-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 4px;
        }

        .ranking-info p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .ranking-badge {
            background: rgba(240, 165, 0, 0.2);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            white-space: nowrap;
        }

        /* Process */
        .process-steps .cell {
            margin-bottom: 28px;
        }

        .process-step {
            text-align: center;
            padding: 36px 28px;
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            height: 100%;
            position: relative;
            transition: var(--transition);
        }

        .process-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .process-step .step-num {
            position: absolute;
            top: 18px;
            right: 20px;
            font-size: 48px;
            font-weight: 900;
            color: rgba(26, 31, 58, 0.06);
            line-height: 1;
        }

        .process-step .icon {
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: var(--accent);
            border-radius: 50%;
            font-size: 24px;
            margin: 0 auto 20px;
            box-shadow: 0 8px 20px rgba(26, 31, 58, 0.25);
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-white);
        }

        .faq-accordion {
            max-width: 840px;
            margin: 0 auto;
            border: none;
        }

        .faq-accordion .accordion-item {
            background: var(--bg);
            border: 1px solid var(--border) !important;
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-accordion .accordion-item:hover {
            border-color: rgba(240, 165, 0, 0.4) !important;
        }

        .faq-accordion .accordion-item.is-active {
            border-color: rgba(240, 165, 0, 0.5) !important;
            box-shadow: var(--shadow-sm);
        }

        .faq-accordion .accordion-title {
            background: transparent;
            color: var(--primary);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            border: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .faq-accordion .accordion-title::before,
        .faq-accordion .accordion-title::after {
            display: none;
        }

        .faq-accordion .accordion-title::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--accent-hover);
            transition: var(--transition);
            display: inline-block;
        }

        .faq-accordion .accordion-item.is-active .accordion-title::after {
            transform: rotate(180deg);
        }

        .faq-accordion .accordion-content {
            background: transparent;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            padding: 0 24px 20px;
            border: none;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #2a3157 100%);
            text-align: center;
            padding: 90px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -120px;
            left: -80px;
            width: 360px;
            height: 360px;
            background: rgba(240, 165, 0, 0.15);
            border-radius: 50%;
            filter: blur(60px);
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

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

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 44px;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 24px;
            display: block;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 6px 0;
        }

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

        .footer-contact p {
            font-size: 14px;
            line-height: 2;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* Focus states */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(240, 165, 0, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }

            .section {
                padding: 70px 0;
            }

            .category-banner {
                padding: 100px 0 70px;
            }

            .category-banner h1 {
                font-size: 38px;
            }

            .header-inner {
                flex-wrap: wrap;
                justify-content: center;
                padding: 16px 0;
                gap: 12px;
            }

            .header-actions {
                position: static;
            }

            .main-nav {
                order: 3;
                width: 100%;
                justify-content: center;
            }
        }

        @media screen and (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .category-banner {
                padding: 80px 0 56px;
            }

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

            .category-banner .banner-desc {
                font-size: 15px;
            }

            .banner-stats {
                gap: 24px;
                margin-top: 32px;
            }

            .banner-stat-item .num {
                font-size: 24px;
            }

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

            .footer-brand p {
                margin: 0 auto;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .btn {
                padding: 11px 24px;
            }

            .main-nav {
                gap: 6px;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 4px;
            }

            .nav-link {
                padding: 8px 16px;
                font-size: 14px;
                white-space: nowrap;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .header-inner {
                min-height: auto;
                padding: 12px 0;
            }

            .brand-badge {
                width: 36px;
                height: 36px;
                font-size: 15px;
                border-radius: 10px;
            }

            .brand-text {
                font-size: 18px;
            }

            .header-actions .btn-sm {
                padding: 6px 14px;
                font-size: 13px;
            }

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

            .category-banner .banner-desc {
                font-size: 14px;
            }

            .banner-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .banner-actions .btn {
                width: 100%;
            }

            .banner-stats {
                flex-direction: column;
                gap: 16px;
                align-items: flex-start;
            }

            .banner-stat-item {
                text-align: left;
                display: flex;
                align-items: baseline;
                gap: 12px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .process-step {
                padding: 28px 20px;
            }

            .ranking-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 16px;
            }

            .ranking-badge {
                display: none;
            }

            .cta-section h2 {
                font-size: 24px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
        }

/* roulang page: article */
:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --bg-deep: #0f172a;
    --text: #1e293b;
    --text-soft: #475569;
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.07);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
button, input { font-family: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 80px 0; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.7);
    transition: var(--transition);
}
.site-header:hover { box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06); }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.brand-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 100%);
    color: #fff;
    border-radius: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 16px;
    letter-spacing: -0.5px;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}
.brand-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.3px;
    line-height: 1.2;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}
.nav-link {
    position: relative;
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-soft);
    border-radius: 999px;
    letter-spacing: 0.2px;
    transition: var(--transition);
}
.nav-link:hover { color: var(--primary); background: rgba(79, 70, 229, 0.06); }
.nav-link.active { color: var(--primary); background: rgba(79, 70, 229, 0.1); font-weight: 700; }
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
}
.nav-cta {
    margin-left: 8px;
    white-space: nowrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    letter-spacing: 0.2px;
}
.btn-primary {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: #fff;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}
.btn-light {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16); color: var(--primary); }
.btn:focus-visible, .nav-link:focus-visible, a:focus-visible {
    outline: 3px solid rgba(79, 70, 229, 0.4);
    outline-offset: 2px;
}

.article-hero {
    position: relative;
    min-height: 360px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #312e81 100%);
    overflow: hidden;
    padding: 80px 0;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.25;
}
.article-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.4) 60%, rgba(15, 23, 42, 0.6) 100%);
}
.hero-content { position: relative; z-index: 2; width: 100%; }
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}
.breadcrumb a { color: rgba(255, 255, 255, 0.85); font-weight: 500; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: rgba(255, 255, 255, 0.4); }
.breadcrumb .current { color: var(--accent); font-weight: 600; }
.hero-title {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    letter-spacing: -0.5px;
    max-width: 860px;
    margin-bottom: 20px;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
}
.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
}
.meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    color: #fff;
    backdrop-filter: blur(8px);
}
.meta-tag i { color: var(--accent); }

.article-main { padding: 64px 0 80px; }
.article-layout { display: flex; gap: 40px; align-items: flex-start; }
.article-content-col { flex: 1 1 0; min-width: 0; }
.article-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 44px 48px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(226, 232, 240, 0.8);
    margin-bottom: 32px;
}
.article-body { font-size: 16px; line-height: 1.85; color: var(--text); }
.article-body p { margin-bottom: 22px; }
.article-body h2 {
    font-size: 26px;
    font-weight: 800;
    color: var(--text);
    margin: 36px 0 16px;
    padding-left: 16px;
    border-left: 4px solid var(--primary);
    letter-spacing: -0.3px;
    line-height: 1.3;
}
.article-body h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--text);
    margin: 28px 0 12px;
    line-height: 1.4;
}
.article-body h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin: 20px 0 10px;
}
.article-body img {
    border-radius: var(--radius);
    margin: 24px 0;
    box-shadow: var(--shadow-sm);
}
.article-body blockquote {
    border-left: 4px solid var(--secondary);
    background: #ecfdf5;
    padding: 16px 22px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 24px 0;
    color: #065f46;
    font-style: normal;
}
.article-body blockquote p { margin-bottom: 8px; }
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body ul, .article-body ol { margin: 16px 0 22px 8px; padding-left: 0; }
.article-body ul li, .article-body ol li {
    position: relative;
    padding-left: 26px;
    margin-bottom: 10px;
    line-height: 1.7;
}
.article-body ul li::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.65;
}
.article-body ol { counter-reset: art-ol; }
.article-body ol li { counter-increment: art-ol; }
.article-body ol li::before {
    content: counter(art-ol);
    position: absolute;
    left: 0;
    top: 2px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-body table th { background: #f1f5f9; font-weight: 700; text-align: left; padding: 12px 16px; border-bottom: 2px solid var(--border); }
.article-body table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.article-body table tr:hover td { background: #f8fafc; }
.article-body a { color: var(--primary); border-bottom: 2px solid rgba(79, 70, 229, 0.2); }
.article-body a:hover { border-bottom-color: var(--primary); }

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 28px;
    margin-top: 32px;
    border-top: 1px solid var(--border);
}
.tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #f1f5f9;
    color: var(--text-soft);
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: var(--transition);
}
.tag-badge:hover { background: rgba(79, 70, 229, 0.1); color: var(--primary); border-color: rgba(79, 70, 229, 0.2); }
.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 20px;
    margin-top: 20px;
    border-top: 1px solid var(--border);
}
.share-label { font-size: 14px; font-weight: 600; color: var(--text-muted); }
.share-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-soft);
    font-size: 15px;
    transition: var(--transition);
}
.share-btn:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3); }

.article-empty {
    text-align: center;
    padding: 80px 24px;
}
.article-empty i { font-size: 48px; color: #cbd5e1; margin-bottom: 20px; }
.article-empty h2 { font-size: 28px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.article-empty p { color: var(--text-muted); margin-bottom: 28px; }

.article-sidebar-col { flex: 0 0 340px; max-width: 340px; }
.sidebar-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(226, 232, 240, 0.7);
    transition: var(--transition);
}
.sidebar-card:hover { box-shadow: var(--shadow); }
.sidebar-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}
.sidebar-card-header i {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
}
.sidebar-card-header h3 { font-size: 17px; font-weight: 700; color: var(--text); }
.sidebar-brand-card {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    border: none;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.sidebar-brand-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
}
.sidebar-brand-card > * { position: relative; z-index: 1; }
.sidebar-brand-card h3 { color: #fff; }
.sidebar-brand-card p { color: rgba(255, 255, 255, 0.75); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.sidebar-list { display: flex; flex-direction: column; gap: 4px; }
.sidebar-list a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 10px;
    color: var(--text-soft);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}
.sidebar-list a:hover { background: #f1f5f9; color: var(--primary); transform: translateX(4px); }
.sidebar-list a i { width: 20px; color: var(--primary); font-size: 14px; }
.sidebar-cta-card { text-align: center; background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); border: 1px solid #fcd34d; }
.sidebar-cta-card h3 { color: #92400e; }
.sidebar-cta-card p { color: #b45309; font-size: 14px; margin-bottom: 18px; }

.related-section { background: #f1f5f9; padding: 72px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-eyebrow {
    display: inline-block;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 999px;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}
.section-header h2 { font-size: 32px; font-weight: 800; color: var(--text); letter-spacing: -0.4px; line-height: 1.25; }
.section-header p { color: var(--text-muted); margin-top: 12px; font-size: 16px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(79, 70, 229, 0.3); }
.related-card-img { position: relative; height: 180px; overflow: hidden; }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-card-img img { transform: scale(1.06); }
.related-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.4) 0%, transparent 60%);
}
.related-category {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    background: rgba(79, 70, 229, 0.9);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
}
.related-card-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.related-card-body h3 { font-size: 17px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; }
.related-card-body h3 a { color: var(--text); }
.related-card-body h3 a:hover { color: var(--primary); }
.related-card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.65; flex: 1; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-date { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.related-date i { font-size: 12px; }

.faq-section { padding: 80px 0; }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 28px;
    margin-bottom: 16px;
    transition: var(--transition);
}
.faq-item:hover { border-color: rgba(79, 70, 229, 0.3); box-shadow: var(--shadow-sm); }
.faq-q { display: flex; align-items: center; gap: 14px; font-size: 16px; font-weight: 700; color: var(--text); }
.faq-q i { color: var(--primary); font-size: 18px; flex-shrink: 0; }
.faq-a { margin-top: 14px; padding-left: 32px; color: var(--text-soft); font-size: 15px; line-height: 1.75; }

.cta-section { padding: 24px 0 80px; }
.cta-box {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 60%, #312e81 100%);
    border-radius: var(--radius-lg);
    padding: 56px 64px;
    position: relative;
    overflow: hidden;
    text-align: center;
}
.cta-box::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 { color: #fff; font-size: 30px; font-weight: 800; letter-spacing: -0.4px; margin-bottom: 14px; }
.cta-box p { color: rgba(255, 255, 255, 0.75); font-size: 16px; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-box .btn { margin: 0 6px; }

.site-footer { background: var(--bg-deep); color: #94a3b8; padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 48px; margin-bottom: 40px; }
.footer-brand .brand-text { color: #fff; font-size: 20px; font-weight: 800; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 380px; }
.footer-links h4, .footer-contact h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; position: relative; padding-bottom: 12px; }
.footer-links h4::after, .footer-contact h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: #94a3b8; transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 6px; }
.footer-contact p { font-size: 14px; margin-bottom: 8px; color: #94a3b8; }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #64748b;
}

@media (max-width: 1024px) {
    .article-layout { flex-direction: column; }
    .article-sidebar-col { flex: 1 1 auto; max-width: 100%; }
    .sidebar-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .sidebar-card { margin-bottom: 0; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .article-card { padding: 36px 32px; }
}
@media (max-width: 767px) {
    .section-padding { padding: 56px 0; }
    .header-inner { height: 64px; gap: 12px; }
    .brand-text { font-size: 18px; }
    .brand-icon { width: 36px; height: 36px; font-size: 14px; border-radius: 10px; }
    .main-nav { gap: 2px; margin-left: auto; }
    .nav-link { padding: 8px 14px; font-size: 14px; }
    .nav-cta { display: none; }
    .article-hero { min-height: 280px; padding: 60px 0; }
    .hero-title { font-size: 26px; }
    .article-main { padding: 40px 0 56px; }
    .article-card { padding: 28px 20px; border-radius: 16px; }
    .article-body { font-size: 15px; }
    .article-body h2 { font-size: 22px; }
    .sidebar-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .related-card-img { height: 200px; }
    .faq-section { padding: 56px 0; }
    .faq-item { padding: 20px; }
    .cta-section { padding: 8px 0 56px; }
    .cta-box { padding: 40px 24px; border-radius: 16px; }
    .cta-box h2 { font-size: 22px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .site-footer { padding: 48px 0 20px; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .header-inner { gap: 8px; }
    .brand-text { font-size: 16px; }
    .brand-icon { width: 32px; height: 32px; font-size: 13px; }
    .nav-link { padding: 6px 10px; font-size: 13px; }
    .related-grid { gap: 16px; }
    .article-card { padding: 24px 16px; }
    .hero-title { font-size: 22px; }
}