/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --clr-primary: #0f1b3d;
        --clr-primary-light: #1a2d5e;
        --clr-primary-dark: #080f24;
        --clr-accent: #f59e0b;
        --clr-accent-light: #fbbf24;
        --clr-accent-dark: #d97706;
        --clr-red: #ef4444;
        --clr-red-light: #f87171;
        --clr-bg: #f5f7fb;
        --clr-bg-alt: #eef1f7;
        --clr-white: #ffffff;
        --clr-text: #111827;
        --clr-text-secondary: #4b5563;
        --clr-text-muted: #9ca3af;
        --clr-border: #e5e7eb;
        --clr-border-light: #f3f4f6;
        --clr-shadow: 0 4px 24px rgba(15, 27, 61, 0.06);
        --clr-shadow-hover: 0 12px 40px rgba(15, 27, 61, 0.12);
        --clr-gradient: linear-gradient(135deg, #0f1b3d 0%, #1a2d5e 100%);
        --clr-gradient-accent: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
        --radius-sm: 6px;
        --radius-md: 10px;
        --radius-lg: 16px;
        --radius-xl: 24px;
        --radius-full: 9999px;
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
        --space-xs: 4px;
        --space-sm: 8px;
        --space-md: 16px;
        --space-lg: 24px;
        --space-xl: 32px;
        --space-2xl: 48px;
        --space-3xl: 64px;
        --space-4xl: 96px;
        --max-width: 1200px;
        --header-height: 72px;
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
    body {
        font-family: var(--font-sans);
        color: var(--clr-text);
        background: var(--clr-bg);
        line-height: 1.6;
        font-size: 16px;
        overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    button { font-family: inherit; cursor: pointer; border: none; background: none; font-size: inherit; }
    input, textarea { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--clr-primary); }
    h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
    h2 { font-size: clamp(1.5rem, 3.5vw, 2.4rem); }
    h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }
    h4 { font-size: 1.125rem; }
    p { color: var(--clr-text-secondary); line-height: 1.7; }
    .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg); }
    .section { padding: var(--space-3xl) 0; }
    .section-alt { background: var(--clr-white); }
    .section-dark { background: var(--clr-gradient); color: var(--clr-white); }
    .section-dark h2, .section-dark h3 { color: var(--clr-white); }
    .section-dark p { color: rgba(255,255,255,0.8); }
    .section-title { text-align: center; margin-bottom: var(--space-2xl); }
    .section-title h2 { margin-bottom: var(--space-md); }
    .section-title p { max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

    /* ===== Header & Navigation ===== */
    .site-header {
        position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
        height: var(--header-height);
        background: transparent;
        transition: background var(--transition), box-shadow var(--transition);
        display: flex; align-items: center;
    }
    .site-header.scrolled {
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .header-logo {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        font-size: 1.35rem;
        font-weight: 800;
        color: var(--clr-white);
        letter-spacing: -0.5px;
        flex-shrink: 0;
    }
    .site-header.scrolled .header-logo { color: var(--clr-primary); }
    .header-logo .logo-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px; height: 36px;
        background: var(--clr-gradient-accent);
        border-radius: var(--radius-sm);
        color: var(--clr-primary-dark);
        font-size: 1.1rem;
    }
    .header-logo .logo-text span { color: var(--clr-accent); }
    .site-header.scrolled .header-logo .logo-text span { color: var(--clr-accent); }

    /* Nav links */
    .nav-links {
        display: flex;
        align-items: center;
        gap: var(--space-xl);
    }
    .nav-links a {
        font-size: 0.925rem;
        font-weight: 500;
        color: rgba(255,255,255,0.85);
        padding: var(--space-xs) 0;
        position: relative;
        transition: color var(--transition);
    }
    .site-header.scrolled .nav-links a { color: var(--clr-text-secondary); }
    .nav-links a::after {
        content: '';
        position: absolute;
        bottom: -2px; left: 0;
        width: 0; height: 2px;
        background: var(--clr-accent);
        border-radius: var(--radius-full);
        transition: width var(--transition);
    }
    .nav-links a:hover { color: var(--clr-accent); }
    .nav-links a:hover::after { width: 100%; }
    .nav-links a.active { color: var(--clr-accent); font-weight: 600; }
    .nav-links a.active::after { width: 100%; }
    .site-header.scrolled .nav-links a.active { color: var(--clr-accent); }

    /* Header right */
    .header-right {
        display: flex;
        align-items: center;
        gap: var(--space-md);
    }
    .search-btn {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        padding: var(--space-sm) var(--space-md);
        background: rgba(255,255,255,0.12);
        border: 1px solid rgba(255,255,255,0.2);
        border-radius: var(--radius-full);
        color: rgba(255,255,255,0.8);
        font-size: 0.85rem;
        transition: all var(--transition);
        cursor: text;
    }
    .site-header.scrolled .search-btn {
        background: var(--clr-bg-alt);
        border-color: var(--clr-border);
        color: var(--clr-text-muted);
    }
    .search-btn i { font-size: 0.8rem; }
    .search-btn .kbd {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0 6px;
        height: 20px;
        background: rgba(0,0,0,0.15);
        border-radius: 4px;
        font-size: 0.7rem;
        font-family: var(--font-mono);
        color: rgba(255,255,255,0.6);
        letter-spacing: -0.5px;
    }
    .site-header.scrolled .search-btn .kbd { background: var(--clr-border); color: var(--clr-text-muted); }
    .search-btn:hover { border-color: var(--clr-accent); color: var(--clr-accent); }

    .header-cta {
        padding: 10px 22px;
        background: var(--clr-gradient-accent);
        color: var(--clr-primary-dark);
        font-weight: 700;
        font-size: 0.9rem;
        border-radius: var(--radius-full);
        transition: all var(--transition);
        box-shadow: 0 4px 14px rgba(245,158,11,0.3);
        white-space: nowrap;
    }
    .header-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(245,158,11,0.4);
        color: var(--clr-primary-dark);
    }

    /* Mobile toggle */
    .mobile-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: var(--space-sm);
        background: none;
        border: none;
        cursor: pointer;
        z-index: 1001;
    }
    .mobile-toggle span {
        display: block;
        width: 24px; height: 2px;
        background: var(--clr-white);
        border-radius: var(--radius-full);
        transition: all var(--transition);
    }
    .site-header.scrolled .mobile-toggle span { background: var(--clr-primary); }
    .mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .mobile-toggle.active span:nth-child(2) { opacity: 0; }
    .mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    /* Mobile nav overlay */
    .mobile-nav-overlay {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(4px);
        z-index: 998;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition);
    }
    .mobile-nav-overlay.open { opacity: 1; pointer-events: auto; }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 100vh;
        display: flex;
        align-items: center;
        background: var(--clr-primary-dark);
        overflow: hidden;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.35;
        transform: scale(1.05);
        animation: heroZoom 20s ease-in-out infinite alternate;
    }
    @keyframes heroZoom {
        0% { transform: scale(1.05); }
        100% { transform: scale(1.15); }
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15,27,61,0.92) 0%, rgba(15,27,61,0.7) 50%, rgba(8,15,36,0.88) 100%);
    }
    .hero .container {
        position: relative;
        z-index: 2;
        padding-top: var(--header-height);
        padding-bottom: var(--space-3xl);
    }
    .hero-content {
        max-width: 720px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        padding: 6px 18px;
        background: rgba(245,158,11,0.15);
        border: 1px solid rgba(245,158,11,0.3);
        border-radius: var(--radius-full);
        color: var(--clr-accent-light);
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: var(--space-lg);
        backdrop-filter: blur(4px);
    }
    .hero-badge i { font-size: 0.75rem; }
    .hero h1 {
        font-size: clamp(2.2rem, 6vw, 4rem);
        font-weight: 800;
        color: var(--clr-white);
        line-height: 1.15;
        margin-bottom: var(--space-lg);
        letter-spacing: -1px;
    }
    .hero h1 .highlight {
        background: var(--clr-gradient-accent);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero p {
        font-size: clamp(1rem, 2vw, 1.2rem);
        color: rgba(255,255,255,0.7);
        max-width: 580px;
        margin-bottom: var(--space-xl);
        line-height: 1.7;
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: var(--space-md);
        align-items: center;
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        padding: 14px 32px;
        background: var(--clr-gradient-accent);
        color: var(--clr-primary-dark);
        font-weight: 700;
        font-size: 1rem;
        border-radius: var(--radius-full);
        transition: all var(--transition);
        box-shadow: 0 4px 20px rgba(245,158,11,0.35);
        border: none;
    }
    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 32px rgba(245,158,11,0.45);
        color: var(--clr-primary-dark);
    }
    .btn-primary i { font-size: 0.9rem; }
    .btn-outline {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        padding: 14px 28px;
        background: transparent;
        color: var(--clr-white);
        font-weight: 600;
        font-size: 1rem;
        border-radius: var(--radius-full);
        border: 2px solid rgba(255,255,255,0.25);
        transition: all var(--transition);
    }
    .btn-outline:hover {
        border-color: var(--clr-accent);
        color: var(--clr-accent);
        background: rgba(245,158,11,0.08);
        transform: translateY(-2px);
    }
    .hero-stats {
        display: flex;
        gap: var(--space-2xl);
        margin-top: var(--space-2xl);
        padding-top: var(--space-xl);
        border-top: 1px solid rgba(255,255,255,0.1);
        flex-wrap: wrap;
    }
    .hero-stat-item { text-align: left; }
    .hero-stat-item .num {
        font-size: 1.8rem;
        font-weight: 800;
        color: var(--clr-accent);
        line-height: 1.2;
    }
    .hero-stat-item .label {
        font-size: 0.85rem;
        color: rgba(255,255,255,0.5);
        margin-top: 2px;
    }

    /* ===== Features / 核心特色 ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-xl);
    }
    .feature-card {
        background: var(--clr-white);
        border-radius: var(--radius-lg);
        padding: var(--space-xl);
        box-shadow: var(--clr-shadow);
        transition: all var(--transition);
        border: 1px solid var(--clr-border-light);
    }
    .feature-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--clr-shadow-hover);
        border-color: var(--clr-accent);
    }
    .feature-card .icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 52px; height: 52px;
        background: var(--clr-gradient);
        border-radius: var(--radius-md);
        color: var(--clr-white);
        font-size: 1.3rem;
        margin-bottom: var(--space-md);
    }
    .feature-card h3 { margin-bottom: var(--space-sm); font-size: 1.15rem; }
    .feature-card p { font-size: 0.925rem; color: var(--clr-text-secondary); }

    /* ===== Category / 分类入口 ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xl);
    }
    .category-card {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        background: var(--clr-white);
        box-shadow: var(--clr-shadow);
        transition: all var(--transition);
        border: 1px solid var(--clr-border-light);
        display: flex;
        flex-direction: column;
    }
    .category-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--clr-shadow-hover);
    }
    .category-card .card-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .category-card:hover .card-img { transform: scale(1.05); }
    .category-card .card-body {
        padding: var(--space-lg);
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .category-card .card-tag {
        display: inline-block;
        padding: 4px 14px;
        background: rgba(245,158,11,0.12);
        color: var(--clr-accent-dark);
        font-size: 0.75rem;
        font-weight: 600;
        border-radius: var(--radius-full);
        margin-bottom: var(--space-sm);
        width: fit-content;
    }
    .category-card h3 { font-size: 1.15rem; margin-bottom: var(--space-sm); }
    .category-card p { font-size: 0.9rem; color: var(--clr-text-secondary); flex: 1; }
    .category-card .card-link {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        margin-top: var(--space-md);
        font-weight: 600;
        color: var(--clr-primary);
        font-size: 0.9rem;
        transition: color var(--transition);
    }
    .category-card .card-link i { font-size: 0.8rem; transition: transform var(--transition); }
    .category-card:hover .card-link { color: var(--clr-accent); }
    .category-card:hover .card-link i { transform: translateX(4px); }

    /* ===== Latest News / 最新资讯 ===== */
    .news-list {
        display: flex;
        flex-direction: column;
        gap: var(--space-md);
    }
    .news-item {
        display: flex;
        align-items: flex-start;
        gap: var(--space-lg);
        background: var(--clr-white);
        padding: var(--space-lg);
        border-radius: var(--radius-md);
        box-shadow: var(--clr-shadow);
        transition: all var(--transition);
        border: 1px solid var(--clr-border-light);
    }
    .news-item:hover {
        box-shadow: var(--clr-shadow-hover);
        border-color: var(--clr-border);
        transform: translateX(4px);
    }
    .news-item .news-img {
        width: 160px;
        height: 110px;
        border-radius: var(--radius-sm);
        object-fit: cover;
        flex-shrink: 0;
    }
    .news-item .news-content { flex: 1; }
    .news-item .news-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: var(--space-sm);
        margin-bottom: var(--space-xs);
    }
    .news-item .news-cat {
        display: inline-block;
        padding: 2px 12px;
        background: var(--clr-primary);
        color: var(--clr-white);
        font-size: 0.7rem;
        font-weight: 600;
        border-radius: var(--radius-full);
    }
    .news-item .news-date {
        font-size: 0.8rem;
        color: var(--clr-text-muted);
    }
    .news-item .news-date i { margin-right: 4px; }
    .news-item h3 {
        font-size: 1.05rem;
        margin-bottom: 4px;
        line-height: 1.4;
    }
    .news-item h3 a { color: var(--clr-primary); transition: color var(--transition); }
    .news-item h3 a:hover { color: var(--clr-accent); }
    .news-item .news-excerpt {
        font-size: 0.875rem;
        color: var(--clr-text-secondary);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-empty {
        text-align: center;
        padding: var(--space-2xl);
        background: var(--clr-white);
        border-radius: var(--radius-md);
        color: var(--clr-text-muted);
        font-size: 0.95rem;
    }

    /* ===== Data Stats ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-xl);
        text-align: center;
    }
    .stat-item {
        padding: var(--space-xl);
        background: rgba(255,255,255,0.06);
        border-radius: var(--radius-lg);
        border: 1px solid rgba(255,255,255,0.08);
        transition: all var(--transition);
    }
    .stat-item:hover {
        background: rgba(255,255,255,0.10);
        border-color: rgba(245,158,11,0.2);
        transform: translateY(-2px);
    }
    .stat-item .num {
        font-size: 2.4rem;
        font-weight: 800;
        color: var(--clr-accent);
        line-height: 1.2;
    }
    .stat-item .label {
        font-size: 0.9rem;
        color: rgba(255,255,255,0.7);
        margin-top: var(--space-sm);
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: var(--space-sm);
    }
    .faq-item {
        background: var(--clr-white);
        border-radius: var(--radius-md);
        border: 1px solid var(--clr-border-light);
        overflow: hidden;
        transition: box-shadow var(--transition);
    }
    .faq-item:hover { box-shadow: var(--clr-shadow); }
    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-md);
        padding: var(--space-lg);
        font-size: 1rem;
        font-weight: 600;
        color: var(--clr-primary);
        background: none;
        border: none;
        text-align: left;
        cursor: pointer;
        transition: color var(--transition);
    }
    .faq-question:hover { color: var(--clr-accent); }
    .faq-question i {
        font-size: 0.85rem;
        color: var(--clr-text-muted);
        transition: transform var(--transition);
        flex-shrink: 0;
    }
    .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--clr-accent); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 var(--space-lg);
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 var(--space-lg) var(--space-lg);
    }
    .faq-answer p {
        font-size: 0.925rem;
        color: var(--clr-text-secondary);
        line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: var(--clr-gradient);
        padding: var(--space-3xl) 0;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%; right: -20%;
        width: 600px; height: 600px;
        background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
        border-radius: 50%;
    }
    .cta-section::after {
        content: '';
        position: absolute;
        bottom: -30%; left: -10%;
        width: 400px; height: 400px;
        background: radial-gradient(circle, rgba(245,158,11,0.06) 0%, transparent 70%);
        border-radius: 50%;
    }
    .cta-content {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 650px;
        margin: 0 auto;
    }
    .cta-content h2 {
        color: var(--clr-white);
        margin-bottom: var(--space-md);
    }
    .cta-content p {
        color: rgba(255,255,255,0.75);
        font-size: 1.05rem;
        margin-bottom: var(--space-xl);
    }
    .cta-content .btn-primary {
        font-size: 1.05rem;
        padding: 16px 40px;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--clr-primary-dark);
        color: rgba(255,255,255,0.7);
        padding: var(--space-3xl) 0 var(--space-xl);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: var(--space-2xl);
        margin-bottom: var(--space-2xl);
    }
    .footer-brand .footer-logo {
        font-size: 1.3rem;
        font-weight: 800;
        color: var(--clr-white);
        margin-bottom: var(--space-md);
        display: flex;
        align-items: center;
        gap: var(--space-sm);
    }
    .footer-brand .footer-logo .logo-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 32px; height: 32px;
        background: var(--clr-gradient-accent);
        border-radius: var(--radius-sm);
        color: var(--clr-primary-dark);
        font-size: 1rem;
    }
    .footer-brand p { font-size: 0.875rem; color: rgba(255,255,255,0.5); max-width: 320px; }
    .footer-col h4 {
        color: var(--clr-white);
        font-size: 0.95rem;
        margin-bottom: var(--space-md);
    }
    .footer-col ul { display: flex; flex-direction: column; gap: var(--space-sm); }
    .footer-col ul a {
        font-size: 0.85rem;
        color: rgba(255,255,255,0.55);
        transition: color var(--transition);
    }
    .footer-col ul a:hover { color: var(--clr-accent); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: var(--space-lg);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: var(--space-md);
        font-size: 0.8rem;
        color: rgba(255,255,255,0.4);
    }
    .footer-bottom a { color: rgba(255,255,255,0.5); }
    .footer-bottom a:hover { color: var(--clr-accent); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-xl); }
    }

    @media (max-width: 768px) {
        .nav-links {
            position: fixed;
            top: 0; right: -100%;
            width: 280px; height: 100vh;
            background: var(--clr-white);
            flex-direction: column;
            padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
            box-shadow: -8px 0 40px rgba(0,0,0,0.1);
            transition: right 0.35s ease;
            z-index: 999;
            gap: var(--space-md);
            align-items: flex-start;
        }
        .nav-links.open { right: 0; }
        .nav-links a {
            color: var(--clr-text-secondary) !important;
            font-size: 1rem;
            padding: var(--space-sm) 0;
        }
        .nav-links a::after { display: none; }
        .nav-links a.active { color: var(--clr-accent) !important; }
        .mobile-toggle { display: flex; }
        .header-right .search-btn { display: none; }
        .header-right .header-cta { padding: 8px 16px; font-size: 0.8rem; }

        .hero { min-height: 90vh; }
        .hero-stats { gap: var(--space-lg); }
        .hero-stat-item .num { font-size: 1.4rem; }

        .features-grid { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: 1fr; }

        .news-item { flex-direction: column; }
        .news-item .news-img { width: 100%; height: 180px; }

        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
        .stat-item .num { font-size: 1.8rem; }

        .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    @media (max-width: 520px) {
        :root { --header-height: 64px; }
        .container { padding: 0 var(--space-md); }
        .section { padding: var(--space-2xl) 0; }
        .hero h1 { font-size: clamp(1.6rem, 8vw, 2.2rem); }
        .hero p { font-size: 0.95rem; }
        .hero-actions { flex-direction: column; width: 100%; }
        .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; justify-content: center; }
        .hero-stats { flex-direction: column; gap: var(--space-md); }
        .hero-stat-item { text-align: center; }

        .stats-grid { grid-template-columns: 1fr 1fr; }
        .stat-item { padding: var(--space-md); }

        .news-item .news-img { height: 140px; }
        .news-item h3 { font-size: 0.95rem; }

        .faq-question { font-size: 0.9rem; padding: var(--space-md); }
        .faq-item.open .faq-answer { padding: 0 var(--space-md) var(--space-md); }

        .cta-content h2 { font-size: 1.4rem; }
        .cta-content .btn-primary { width: 100%; justify-content: center; }
    }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #e63946;
        --primary-dark: #c1121f;
        --primary-light: #ff6b6b;
        --secondary: #1d3557;
        --accent: #f4a261;
        --bg: #ffffff;
        --bg-alt: #f8f9fa;
        --bg-dark: #0f1a2e;
        --text: #1a1a2e;
        --text-light: #6c757d;
        --text-white: #ffffff;
        --border: #e9ecef;
        --border-light: #f0f0f0;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 24px rgba(0,0,0,0.06);
        --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
        --shadow-btn: 0 4px 14px rgba(230,57,70,0.30);
        --transition: 0.25s ease;
        --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
        --max-width: 1200px;
        --nav-height: 72px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
        padding-top: var(--nav-height);
    }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary-dark); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; color: var(--text-light); }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 10px 28px; border-radius: 50px;
        font-size: 0.95rem; font-weight: 600;
        border: none; cursor: pointer;
        transition: all var(--transition);
        text-decoration: none;
    }
    .btn-primary {
        background: var(--primary); color: #fff;
        box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 25px rgba(230,57,70,0.40); }
    .btn-outline {
        background: transparent; color: var(--primary);
        border: 2px solid var(--primary);
    }
    .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
    .btn-sm { padding: 6px 18px; font-size: 0.85rem; }

    /* ===== Badge / Tag ===== */
    .badge {
        display: inline-block;
        padding: 4px 14px; border-radius: 50px;
        font-size: 0.78rem; font-weight: 600;
        background: var(--primary); color: #fff;
    }
    .badge-outline {
        background: transparent; color: var(--primary);
        border: 1.5px solid var(--primary);
    }
    .tag {
        display: inline-block;
        padding: 3px 12px; border-radius: 6px;
        font-size: 0.75rem; font-weight: 500;
        background: var(--bg-alt); color: var(--text-light);
        transition: all var(--transition);
    }
    .tag:hover { background: var(--primary); color: #fff; }

    /* ===== Header / Nav ===== */
    .site-header {
        position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
        height: var(--nav-height);
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        transition: all var(--transition);
    }
    .site-header .container {
        display: flex; align-items: center; justify-content: space-between;
        height: 100%;
    }
    .logo {
        display: flex; align-items: center; gap: 10px;
        font-size: 1.35rem; font-weight: 800;
        color: var(--text); text-decoration: none;
    }
    .logo .logo-icon {
        width: 36px; height: 36px;
        display: flex; align-items: center; justify-content: center;
        background: var(--primary); color: #fff;
        border-radius: var(--radius-sm);
        font-size: 1.1rem;
    }
    .logo:hover { color: var(--text); }
    .nav-links { display: flex; align-items: center; gap: 8px; }
    .nav-links a {
        padding: 8px 18px; border-radius: 50px;
        font-size: 0.92rem; font-weight: 500;
        color: var(--text-light); text-decoration: none;
        transition: all var(--transition);
    }
    .nav-links a:hover { color: var(--primary); background: rgba(230,57,70,0.06); }
    .nav-links a.active { color: #fff; background: var(--primary); }
    .nav-actions { display: flex; align-items: center; gap: 12px; }
    .search-toggle {
        width: 40px; height: 40px; border-radius: 50%;
        display: flex; align-items: center; justify-content: center;
        border: 1.5px solid var(--border); background: transparent;
        color: var(--text-light); cursor: pointer;
        transition: all var(--transition); font-size: 1rem;
    }
    .search-toggle:hover { border-color: var(--primary); color: var(--primary); }
    .hamburger {
        display: none; flex-direction: column; gap: 5px;
        background: none; border: none; cursor: pointer; padding: 6px;
    }
    .hamburger span {
        display: block; width: 24px; height: 2.5px;
        background: var(--text); border-radius: 4px;
        transition: all var(--transition);
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb-wrap {
        background: var(--bg-alt);
        padding: 16px 0;
        border-bottom: 1px solid var(--border);
    }
    .breadcrumb {
        display: flex; align-items: center; gap: 8px;
        font-size: 0.88rem; color: var(--text-light);
        flex-wrap: wrap;
    }
    .breadcrumb a { color: var(--text-light); }
    .breadcrumb a:hover { color: var(--primary); }
    .breadcrumb .sep { color: #ccc; }

    /* ===== Article Layout ===== */
    .article-wrapper {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
        padding: 40px 0 60px;
    }
    .article-main { min-width: 0; }
    .article-sidebar { min-width: 0; }

    /* article header */
    .article-header { margin-bottom: 32px; }
    .article-header .badge { margin-bottom: 16px; }
    .article-header h1 {
        font-size: 2.0rem;
        margin-bottom: 16px;
        color: var(--text);
    }
    .article-meta {
        display: flex; align-items: center; gap: 20px;
        flex-wrap: wrap; font-size: 0.9rem; color: var(--text-light);
    }
    .article-meta i { margin-right: 4px; }
    .article-meta .meta-item { display: flex; align-items: center; gap: 4px; }

    /* article cover */
    .article-cover {
        margin-bottom: 32px;
        border-radius: var(--radius);
        overflow: hidden;
        max-height: 460px;
        object-fit: cover;
        width: 100%;
        background: var(--bg-alt);
    }

    /* article content */
    .article-content {
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--text);
    }
    .article-content p { margin-bottom: 1.2rem; color: var(--text); }
    .article-content h2, .article-content h3 { margin-top: 2rem; margin-bottom: 0.8rem; }
    .article-content ul, .article-content ol {
        margin-bottom: 1.2rem; padding-left: 1.5rem; list-style: disc;
    }
    .article-content li { margin-bottom: 0.4rem; color: var(--text); }
    .article-content img { border-radius: var(--radius-sm); margin: 1.5rem 0; }

    /* article footer */
    .article-footer {
        margin-top: 40px; padding-top: 24px;
        border-top: 1px solid var(--border);
        display: flex; justify-content: space-between; align-items: center;
        flex-wrap: wrap; gap: 16px;
    }
    .article-tags { display: flex; gap: 8px; flex-wrap: wrap; }
    .article-share { display: flex; align-items: center; gap: 10px; }
    .article-share span { font-size: 0.9rem; color: var(--text-light); }
    .share-btn {
        width: 36px; height: 36px; border-radius: 50%;
        display: flex; align-items: center; justify-content: center;
        border: 1.5px solid var(--border); background: transparent;
        color: var(--text-light); cursor: pointer; font-size: 0.9rem;
        transition: all var(--transition);
    }
    .share-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(230,57,70,0.06); }

    /* ===== Sidebar ===== */
    .sidebar-card {
        background: var(--bg-alt);
        border-radius: var(--radius);
        padding: 28px 24px;
        margin-bottom: 28px;
        border: 1px solid var(--border);
    }
    .sidebar-card h3 {
        font-size: 1.1rem; margin-bottom: 16px;
        display: flex; align-items: center; gap: 8px;
    }
    .sidebar-card h3::after {
        content: '';
        flex: 1; height: 2px; background: var(--border);
    }
    .sidebar-post-item {
        display: flex; gap: 14px; padding: 12px 0;
        border-bottom: 1px solid var(--border-light);
        align-items: flex-start;
    }
    .sidebar-post-item:last-child { border-bottom: none; padding-bottom: 0; }
    .sidebar-post-item .thumb {
        width: 70px; height: 56px; border-radius: 6px;
        object-fit: cover; flex-shrink: 0;
        background: var(--border);
    }
    .sidebar-post-item .info { flex: 1; min-width: 0; }
    .sidebar-post-item .info a {
        font-size: 0.88rem; font-weight: 600; color: var(--text);
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
        overflow: hidden; line-height: 1.4;
    }
    .sidebar-post-item .info a:hover { color: var(--primary); }
    .sidebar-post-item .info .date { font-size: 0.76rem; color: var(--text-light); margin-top: 4px; }

    /* category list in sidebar */
    .sidebar-cat-list li { padding: 10px 0; border-bottom: 1px solid var(--border-light); }
    .sidebar-cat-list li:last-child { border-bottom: none; padding-bottom: 0; }
    .sidebar-cat-list a {
        display: flex; justify-content: space-between; align-items: center;
        color: var(--text-light); font-size: 0.92rem;
    }
    .sidebar-cat-list a:hover { color: var(--primary); }
    .sidebar-cat-list .count {
        background: var(--border); padding: 1px 10px; border-radius: 50px;
        font-size: 0.76rem; color: var(--text-light);
    }

    /* ===== Related Posts ===== */
    .related-section {
        background: var(--bg-alt);
        padding: 48px 0;
        border-top: 1px solid var(--border);
    }
    .related-section h2 { text-align: center; margin-bottom: 36px; font-size: 1.6rem; }
    .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);
        transition: all var(--transition);
    }
    .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .related-card img {
        width: 100%; height: 170px; object-fit: cover;
        border-radius: 0;
    }
    .related-card .body { padding: 18px 20px 22px; }
    .related-card .body h4 { font-size: 1.0rem; margin-bottom: 8px; }
    .related-card .body h4 a { color: var(--text); }
    .related-card .body h4 a:hover { color: var(--primary); }
    .related-card .body p { font-size: 0.87rem; color: var(--text-light); margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-dark);
        color: rgba(255,255,255,0.75);
        padding: 56px 0 0;
    }
    .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand .footer-logo {
        display: flex; align-items: center; gap: 10px;
        font-size: 1.3rem; font-weight: 800; color: #fff;
        margin-bottom: 16px;
    }
    .footer-brand .footer-logo .logo-icon {
        width: 36px; height: 36px;
        display: flex; align-items: center; justify-content: center;
        background: var(--primary); color: #fff;
        border-radius: var(--radius-sm); font-size: 1.1rem;
    }
    .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); line-height: 1.7; max-width: 360px; }
    .footer-col h4 {
        font-size: 1.0rem; font-weight: 700; color: #fff;
        margin-bottom: 18px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a {
        color: rgba(255,255,255,0.55); font-size: 0.9rem;
        transition: all var(--transition);
    }
    .footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
    .footer-bottom {
        display: flex; justify-content: space-between; align-items: center;
        padding: 20px 0; flex-wrap: wrap; gap: 12px;
        font-size: 0.85rem; color: rgba(255,255,255,0.4);
    }
    .footer-bottom a { color: rgba(255,255,255,0.4); }
    .footer-bottom a:hover { color: var(--primary-light); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .article-wrapper { grid-template-columns: 1fr; gap: 36px; }
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    }
    @media (max-width: 768px) {
        body { padding-top: 64px; }
        :root { --nav-height: 64px; }
        .nav-links { display: none; }
        .nav-links.open {
            display: flex; flex-direction: column;
            position: absolute; top: var(--nav-height); left: 0; right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            padding: 16px 24px; gap: 4px;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 32px rgba(0,0,0,0.06);
        }
        .nav-links.open a { width: 100%; }
        .hamburger { display: flex; }
        .search-toggle { display: none; }
        h1 { font-size: 1.6rem; }
        h2 { font-size: 1.4rem; }
        .article-header h1 { font-size: 1.5rem; }
        .related-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .article-footer { flex-direction: column; align-items: flex-start; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-meta { gap: 10px; font-size: 0.82rem; }
        .article-content { font-size: 1.0rem; }
        .sidebar-card { padding: 20px 16px; }
        .related-card .body { padding: 14px 16px 18px; }
    }

    /* not found state */
    .not-found-box {
        text-align: center; padding: 80px 20px;
    }
    .not-found-box .icon { font-size: 4rem; color: var(--border); margin-bottom: 20px; }
    .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
    .not-found-box p { color: var(--text-light); margin-bottom: 24px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a56db;
            --primary-light: #2563eb;
            --primary-dark: #0f3a8c;
            --primary-bg: #eef2ff;
            --secondary: #7c3aed;
            --secondary-light: #8b5cf6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-padding {
            padding: 80px 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 4px 16px;
            border-radius: 100px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin-bottom: 2rem;
        }
        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .gap-1 {
            gap: 1rem;
        }
        .gap-2 {
            gap: 2rem;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 2rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 1.5rem;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 50px;
            transition: all var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            background: transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(26, 86, 219, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.25);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-light {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(4px);
        }
        .btn-light:hover {
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .btn i {
            font-size: 1.1em;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 100px;
            background: var(--primary-bg);
            color: var(--primary);
            letter-spacing: 0.02em;
        }
        .badge-hot {
            background: #fef2f2;
            color: #dc2626;
        }
        .badge-new {
            background: #ecfdf5;
            color: #059669;
        }
        .badge-accent {
            background: #fffbeb;
            color: #d97706;
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            font-size: 0.82rem;
            padding: 5px 14px;
            border-radius: 100px;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: default;
        }
        .tag:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: var(--primary);
        }
        .tag-active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .card-body {
            padding: 20px 24px 24px;
        }
        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-title a {
            color: var(--text);
        }
        .card-title a:hover {
            color: var(--primary);
        }
        .card-text {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-lighter);
        }
        .card-meta i {
            margin-right: 4px;
        }
        .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link i {
            transition: transform var(--transition);
        }
        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text);
            background: var(--bg-alt);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 0 16px;
            transition: all var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.12);
            background: #fff;
        }
        .search-box i {
            color: var(--text-lighter);
            font-size: 0.9rem;
        }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 10px;
            font-size: 0.9rem;
            color: var(--text);
            width: 140px;
        }
        .search-box input::placeholder {
            color: var(--text-lighter);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--bg-alt);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f3a8c 100%);
            overflow: hidden;
            min-height: 400px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .badge {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            font-size: 0.8rem;
        }
        .category-hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-stats {
            display: flex;
            gap: 36px;
            margin-top: 12px;
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Filter Tabs ===== */
        .filter-section {
            padding: 32px 0 0;
            position: relative;
            z-index: 3;
            margin-top: -2px;
            background: var(--bg);
        }
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding: 8px 0 16px;
            border-bottom: 1px solid var(--border);
        }
        .filter-tab {
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-tab:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-bg);
        }
        .filter-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
        }

        /* ===== Section Content ===== */
        .section-guide {
            background: var(--bg);
        }
        .section-guide-alt {
            background: var(--bg-alt);
        }
        .guide-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .guide-card-lg {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .guide-card-lg:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .guide-card-lg .card-img-top {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .guide-card-lg .card-content {
            padding: 24px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card-lg .card-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .guide-card-lg .card-content p {
            flex: 1;
            margin-bottom: 16px;
        }

        /* ===== Timeline / Process ===== */
        .timeline {
            position: relative;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary), var(--secondary));
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            padding-bottom: 32px;
            padding-left: 20px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg);
            box-shadow: 0 0 0 2px var(--primary);
        }
        .timeline-item .step {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .timeline-item h4 {
            font-size: 1.1rem;
            margin: 4px 0 6px;
        }
        .timeline-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--secondary) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 32px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 0.95rem;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        .footer-bottom span {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            h1 {
                font-size: 2rem;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--radius-sm);
            }
            .menu-toggle {
                display: block;
            }
            .search-box input {
                width: 100px;
            }
            .category-hero {
                padding: 80px 0 56px;
                min-height: auto;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .hero-stats {
                gap: 20px;
                flex-wrap: wrap;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .filter-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 12px;
            }
            .filter-tab {
                flex-shrink: 0;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .timeline {
                padding-left: 30px;
            }
            .timeline-item::before {
                left: -22px;
                width: 12px;
                height: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .guide-card-lg .card-content {
                padding: 18px 20px 22px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.88rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .header-actions .btn {
                display: none;
            }
            .search-box input {
                width: 80px;
            }
        }

        /* ===== Utility ===== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .items-center {
            align-items: center;
        }
        .justify-between {
            justify-content: space-between;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .gap-4 {
            gap: 2rem;
        }