/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #FF6B35;
            --primary-dark: #E55A2B;
            --primary-light: #FF8A5C;
            --secondary: #1B1B2F;
            --secondary-light: #2D2D44;
            --accent: #F59E0B;
            --bg-body: #F8F9FA;
            --bg-white: #FFFFFF;
            --bg-dark: #111827;
            --bg-card: #FFFFFF;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #9CA3AF;
            --text-light: #F9FAFB;
            --text-dark: #111827;
            --border-color: #E5E7EB;
            --border-light: #F3F4F6;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 3.2rem; }
        h2 { font-size: 2.4rem; }
        h3 { font-size: 1.6rem; }
        h4 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-fluid { width: 100%; padding: 0 24px; }
        .section { padding: var(--spacing-section) 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 600px; margin: 0 auto; color: var(--text-muted); font-size: 1.05rem; }
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 12px; }
        .gap-4 { gap: 16px; }
        .gap-6 { gap: 24px; }
        .mt-4 { margin-top: 16px; }
        .mt-6 { margin-top: 24px; }
        .mt-8 { margin-top: 32px; }
        .mb-4 { margin-bottom: 16px; }
        .mb-6 { margin-bottom: 24px; }
        .mb-8 { margin-bottom: 32px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255,107,53,0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(255,107,53,0.25); }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.5);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active { transform: translateY(0); }
        .btn-white {
            background: #fff;
            color: var(--text-primary);
            border-color: #fff;
        }
        .btn-white:hover {
            background: var(--bg-body);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.125rem; }
        .btn i { font-size: 1.1em; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 100px;
            background: rgba(255,107,53,0.12);
            color: var(--primary);
            letter-spacing: 0.02em;
            text-transform: uppercase;
        }
        .badge-white { background: rgba(255,255,255,0.2); color: #fff; }
        .badge-dark { background: rgba(0,0,0,0.06); color: var(--text-secondary); }
        .tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.8rem;
            border-radius: var(--radius-sm);
            background: var(--border-light);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .tag:hover { background: var(--primary); color: #fff; }
        .tag-sm { padding: 2px 10px; font-size: 0.7rem; }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
        .card-body { padding: 20px 24px 24px; }
        .card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
        .card-meta i { margin-right: 4px; }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(27,27,47,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .header-logo i { color: var(--primary); font-size: 1.6rem; }
        .header-logo span { background: linear-gradient(135deg, #fff 60%, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-nav { display: flex; align-items: center; gap: 8px; }
        .header-nav a {
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .header-nav a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .header-nav a.active { color: #fff; }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-actions { display: flex; align-items: center; gap: 12px; }
        .header-search {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.08);
            border-radius: 100px;
            padding: 6px 6px 6px 16px;
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .header-search:focus-within { background: rgba(255,255,255,0.14); border-color: var(--primary); }
        .header-search input {
            background: transparent;
            color: #fff;
            font-size: 0.85rem;
            width: 140px;
        }
        .header-search input::placeholder { color: rgba(255,255,255,0.4); }
        .header-search button {
            color: rgba(255,255,255,0.5);
            padding: 6px 10px;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .header-search button:hover { color: var(--primary); }
        .header-mobile-toggle { display: none; color: #fff; font-size: 1.5rem; padding: 6px; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.45;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero:hover .hero-bg { transform: scale(1.02); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27,27,47,0.92) 40%, rgba(17,24,39,0.6) 70%, rgba(255,107,53,0.15) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            width: 100%;
        }
        .hero-content { max-width: 580px; }
        .hero-content .badge { margin-bottom: 20px; }
        .hero-content h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.1;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero-content h1 .highlight { color: var(--primary); }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 32px;
            max-width: 480px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual-card {
            width: 100%;
            max-width: 480px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-xl);
            padding: 12px;
            border: 1px solid rgba(255,255,255,0.08);
            backdrop-filter: blur(8px);
        }
        .hero-visual-card img {
            width: 100%;
            border-radius: var(--radius-lg);
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 20px;
            padding: 16px 20px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.05);
        }
        .hero-stats-item { text-align: center; }
        .hero-stats-item .num { font-size: 1.6rem; font-weight: 800; color: #fff; }
        .hero-stats-item .label { font-size: 0.75rem; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.04em; margin-top: 2px; }

        /* ===== Features / 特色 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-card .icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 20px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            background: var(--primary);
        }
        .feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== Category / 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-dark);
            min-height: 260px;
            display: flex;
            align-items: flex-end;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.55;
            transition: var(--transition);
        }
        .category-card:hover img { opacity: 0.4; transform: scale(1.05); }
        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(27,27,47,0.85) 0%, rgba(27,27,47,0.2) 60%, transparent 100%);
        }
        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .category-card-body h3 { color: #fff; font-size: 1.4rem; margin-bottom: 6px; }
        .category-card-body p { color: rgba(255,255,255,0.65); font-size: 0.9rem; margin-bottom: 12px; max-width: 320px; }
        .category-card-body .btn { 
            background: rgba(255,255,255,0.12); 
            color: #fff; 
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 20px;
            font-size: 0.85rem;
            border-radius: 100px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-card-body .btn:hover { background: var(--primary); border-color: var(--primary); }

        /* ===== Latest / CMS列表 ===== */
        .latest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .latest-card { 
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .latest-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .latest-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            background: var(--border-light);
        }
        .latest-card-body { padding: 18px 20px 22px; }
        .latest-card-body .badge { margin-bottom: 10px; }
        .latest-card-body h3 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.35; }
        .latest-card-body p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .latest-card-meta { display: flex; align-items: center; gap: 14px; font-size: 0.78rem; color: var(--text-muted); }
        .latest-card-meta i { margin-right: 4px; }
        .latest-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .latest-empty i { font-size: 2.4rem; margin-bottom: 16px; opacity: 0.4; }
        .latest-empty p { font-size: 1rem; }

        /* ===== Stats / 数据 ===== */
        .stats-section { background: var(--bg-dark); position: relative; overflow: hidden; }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
        }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 2; }
        .stats-item { text-align: center; padding: 24px 16px; }
        .stats-item .num { font-size: 2.8rem; font-weight: 800; color: #fff; line-height: 1.1; }
        .stats-item .num .suffix { font-size: 1.6rem; color: var(--primary); }
        .stats-item .label { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 6px; letter-spacing: 0.02em; }

        /* ===== FAQ ===== */
        .faq-grid { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
            background: transparent;
            width: 100%;
            text-align: left;
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
        .faq-question.active i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-answer-inner { padding: 0 24px 20px; font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            padding: 100px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 640px; margin: 0 auto; }
        .cta-content h2 { color: #fff; font-size: 2.6rem; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.6); font-size: 1.1rem; margin-bottom: 32px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.6);
            padding: 48px 0 28px;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
        .footer-brand .header-logo { margin-bottom: 14px; }
        .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.45); max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-social { display: flex; gap: 14px; margin-top: 16px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Mobile Nav ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(27,27,47,0.98);
            backdrop-filter: blur(16px);
            padding: 20px 24px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            z-index: 999;
            transform: translateY(-120%);
            transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
        }
        .mobile-menu.open { transform: translateY(0); }
        .mobile-menu a {
            display: block;
            padding: 14px 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a.active { color: var(--primary); }
        .mobile-menu a i { margin-right: 12px; width: 24px; text-align: center; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root { --spacing-section: 60px; }
            h1 { font-size: 2.6rem; }
            h2 { font-size: 1.9rem; }
            .hero .container { grid-template-columns: 1fr; gap: 40px; }
            .hero-content { max-width: 100%; text-align: center; }
            .hero-content p { margin: 0 auto 32px; }
            .hero-actions { justify-content: center; }
            .hero-visual { display: none; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .latest-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            :root { --spacing-section: 48px; --header-height: 64px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.6rem; }
            .header-nav { display: none; }
            .header-actions .btn { display: none; }
            .header-search { display: none; }
            .header-mobile-toggle { display: block; }
            .mobile-menu { display: block; }
            .hero { min-height: 70vh; }
            .hero-content h1 { font-size: 2.4rem; }
            .features-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .latest-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stats-item .num { font-size: 2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-content h2 { font-size: 1.8rem; }
            .faq-question { font-size: 0.92rem; padding: 14px 18px; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.4rem; }
            .hero-content h1 { font-size: 1.9rem; }
            .btn-lg { padding: 12px 24px; font-size: 0.95rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stats-item .num { font-size: 1.6rem; }
            .section-title p { font-size: 0.9rem; }
        }

        @media (min-width: 769px) {
            .mobile-menu { display: none !important; }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #E8590C;
            --primary-light: #F97316;
            --primary-dark: #C2410C;
            --primary-bg: #FFF7ED;
            --secondary: #1E3A5F;
            --secondary-light: #2D5A87;
            --accent: #FCD34D;
            --bg-light: #FAFAF9;
            --bg-white: #FFFFFF;
            --bg-dark: #0F172A;
            --text-primary: #1C1917;
            --text-secondary: #57534E;
            --text-light: #A8A29E;
            --text-white: #FFFFFF;
            --border-light: #E7E5E4;
            --border-medium: #D6D3D1;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.25s ease;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            transition: var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .header-logo i {
            color: var(--primary);
            font-size: 26px;
            background: var(--primary-bg);
            padding: 8px;
            border-radius: 10px;
        }

        .header-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }

        .header-nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }

        .header-nav a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 2px 8px rgba(232, 89, 12, 0.3);
        }

        .header-nav a.active:hover {
            background: var(--primary-dark);
        }

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

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: 50px;
            padding: 0 16px;
            height: 40px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(232, 89, 12, 0.12);
        }

        .header-search input {
            background: transparent;
            border: none;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-primary);
            width: 160px;
        }

        .header-search input::placeholder {
            color: var(--text-light);
        }

        .header-search button {
            color: var(--text-light);
            padding: 4px 0 4px 8px;
            font-size: 16px;
            transition: var(--transition);
        }

        .header-search button:hover {
            color: var(--primary);
        }

        .mobile-toggle {
            display: none;
            font-size: 24px;
            color: var(--text-primary);
            padding: 6px;
            border-radius: 8px;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
        }

        .mobile-toggle:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        @media (max-width: 900px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border-light);
                flex-direction: column;
                padding: 16px 24px;
                gap: 6px;
                box-shadow: var(--shadow-md);
            }

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

            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .mobile-toggle {
                display: flex;
            }

            .header-search input {
                width: 120px;
            }
        }

        @media (max-width: 520px) {
            .header-logo span {
                font-size: 18px;
            }

            .header-logo i {
                font-size: 20px;
                padding: 6px;
            }

            .header-search input {
                width: 80px;
                font-size: 13px;
            }

            .header-search {
                padding: 0 12px;
                height: 36px;
            }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            margin-top: var(--header-height);
            padding: 80px 0 64px;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 60%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-light);
            clip-path: ellipse(70% 100% at 50% 100%);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--text-white);
        }

        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .page-banner p {
            font-size: 18px;
            max-width: 680px;
            margin: 0 auto;
            opacity: 0.9;
            line-height: 1.6;
        }

        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 14px;
            opacity: 0.8;
        }

        .page-banner .breadcrumb a {
            color: var(--accent);
        }

        .page-banner .breadcrumb a:hover {
            text-decoration: underline;
        }

        .page-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.7);
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 48px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .page-banner::after {
                height: 30px;
                clip-path: ellipse(80% 100% at 50% 100%);
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner p {
                font-size: 14px;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 72px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-header .label-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Filter Tabs ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
            margin-bottom: 40px;
        }

        .filter-tabs .tab {
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }

        .filter-tabs .tab:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-bg);
        }

        .filter-tabs .tab.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 2px 8px rgba(232, 89, 12, 0.25);
        }

        /* ===== News Grid ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

        .news-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }

        .news-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            width: fit-content;
            letter-spacing: 0.2px;
        }

        .news-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 8px;
            transition: var(--transition);
        }

        .news-card:hover h3 {
            color: var(--primary);
        }

        .news-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }

        .news-card .card-meta i {
            margin-right: 4px;
        }

        .news-card .card-meta .meta-item {
            display: flex;
            align-items: center;
        }

        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 640px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-card .card-body {
                padding: 16px 18px 20px;
            }
            .news-card h3 {
                font-size: 16px;
            }
        }

        /* ===== Featured Article ===== */
        .featured-article {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            margin-bottom: 60px;
        }

        .featured-article .fa-img {
            width: 100%;
            height: 100%;
            min-height: 360px;
            object-fit: cover;
            border-radius: 0;
        }

        .featured-article .fa-body {
            padding: 40px 40px 40px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-article .fa-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-white);
            background: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 16px;
            width: fit-content;
        }

        .featured-article h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .featured-article p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .featured-article .btn {
            align-self: flex-start;
        }

        @media (max-width: 900px) {
            .featured-article {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .featured-article .fa-body {
                padding: 28px 24px 32px;
            }
            .featured-article .fa-img {
                min-height: 240px;
                max-height: 300px;
            }
            .featured-article h2 {
                font-size: 22px;
            }
        }

        /* ===== Button ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 2px 8px rgba(232, 89, 12, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(232, 89, 12, 0.35);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }

        /* ===== Category Cards (分类入口) ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .cat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

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

        .cat-card .cat-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 16px;
            background: var(--primary-bg);
            width: 64px;
            height: 64px;
            line-height: 64px;
            border-radius: 50%;
            margin-left: auto;
            margin-right: auto;
            transition: var(--transition);
        }

        .cat-card:hover .cat-icon {
            background: var(--primary);
            color: var(--text-white);
            transform: scale(1.05);
        }

        .cat-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .cat-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        @media (max-width: 900px) {
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .cat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .cat-card {
                padding: 20px 12px 18px;
            }
            .cat-card .cat-icon {
                width: 52px;
                height: 52px;
                line-height: 52px;
                font-size: 28px;
            }
            .cat-card h4 {
                font-size: 15px;
            }
        }

        /* ===== Stats / Numbers ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .stat-item .num {
            font-size: 40px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .num {
                font-size: 32px;
            }
        }

        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-item .num {
                font-size: 28px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
            gap: 12px;
        }

        .faq-question i {
            color: var(--text-light);
            transition: var(--transition);
            font-size: 14px;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 50%, var(--primary-dark) 100%);
            padding: 72px 0;
            text-align: center;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 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: 34px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }

        .cta-section p {
            font-size: 18px;
            opacity: 0.9;
            max-width: 580px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }

        .cta-section .btn {
            background: var(--accent);
            color: var(--text-primary);
            font-weight: 700;
            box-shadow: 0 4px 20px rgba(252, 211, 77, 0.3);
        }

        .cta-section .btn:hover {
            background: #FBBF24;
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(252, 211, 77, 0.4);
            color: var(--text-primary);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 15px;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
            margin-top: auto;
        }

        .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 .header-logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .footer-brand .header-logo i {
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent);
        }

        .footer-brand .header-logo span {
            -webkit-text-fill-color: var(--text-white);
            background: none;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 18px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.2px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Pagination ===== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 48px;
        }

        .pagination a,
        .pagination span {
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-bg);
        }

        .pagination .current {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 2px 8px rgba(232, 89, 12, 0.2);
        }

        .pagination .dots {
            border: none;
            background: transparent;
            color: var(--text-light);
        }

        /* ===== Responsive Utilities ===== */
        @media (max-width: 768px) {
            .hide-mobile {
                display: none !important;
            }
        }

        @media (min-width: 769px) {
            .hide-desktop {
                display: none !important;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
            border: none;
        }

        .back-top.visible {
            opacity: 1;
            pointer-events: auto;
        }

        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #D32F2F;
            --primary-dark: #B71C1C;
            --primary-light: #EF5350;
            --secondary: #1A1A2E;
            --secondary-light: #2D2D44;
            --accent: #FFB300;
            --accent-light: #FFC107;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #9CA3AF;
            --text-white: #FFFFFF;
            --border-color: #E5E7EB;
            --border-light: #F3F4F6;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --max-width: 1200px;
            --header-height: 72px;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: 0.3s 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-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .section-padding {
            padding: var(--spacing-xl) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
            margin-bottom: 0.75rem;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0.75rem auto 0;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .header-logo i {
            font-size: 1.6rem;
            color: var(--primary);
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .header-nav a {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .header-nav a:hover {
            background: rgba(211, 47, 47, 0.06);
            color: var(--primary);
        }
        .header-nav a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 2px 12px rgba(211, 47, 47, 0.25);
        }
        .header-nav a.active:hover {
            background: var(--primary-dark);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 0.35rem 0.75rem;
            border: 1px solid var(--border-color);
            transition: border-color var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.1);
        }
        .header-search input {
            padding: 0.35rem 0.5rem;
            font-size: 0.9rem;
            color: var(--text-primary);
            background: transparent;
            width: 120px;
            transition: width var(--transition);
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search input:focus {
            width: 160px;
        }
        .header-search button {
            color: var(--text-muted);
            cursor: pointer;
            padding: 0.2rem;
            font-size: 0.95rem;
            transition: color var(--transition);
        }
        .header-search button:hover {
            color: var(--primary);
        }
        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem;
            background: none;
            border: none;
            transition: color var(--transition);
        }
        .menu-toggle:hover {
            color: var(--primary);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: calc(var(--header-height) + var(--spacing-xl)) 0 var(--spacing-lg);
            background: var(--secondary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 320px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.88), rgba(0, 0, 0, 0.55));
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--transition);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .article-hero .breadcrumb i {
            font-size: 0.65rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .article-hero h1 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3.8vw, 2.6rem);
            max-width: 900px;
            margin: 0 auto 1rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .article-hero .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
        }
        .article-hero .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-hero .article-meta i {
            font-size: 0.85rem;
            color: var(--accent);
        }
        .article-hero .article-meta .category-badge {
            display: inline-block;
            background: var(--primary);
            color: var(--text-white);
            padding: 0.2rem 0.9rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-hero-error {
            min-height: 280px;
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: var(--spacing-lg) 0;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: var(--spacing-lg);
            align-items: start;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body .content-area {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .content-area p {
            margin-bottom: 1.25rem;
            color: var(--text-secondary);
        }
        .article-body .content-area h2,
        .article-body .content-area h3,
        .article-body .content-area h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .article-body .content-area img {
            border-radius: var(--radius-sm);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content-area blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-light);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content-area ul,
        .article-body .content-area ol {
            margin: 1rem 0 1.25rem 1.5rem;
            color: var(--text-secondary);
        }
        .article-body .content-area ul li,
        .article-body .content-area ol li {
            margin-bottom: 0.4rem;
            list-style: disc;
        }
        .article-body .content-area ol li {
            list-style: decimal;
        }
        .article-body .content-area a {
            color: var(--primary);
            border-bottom: 1px solid transparent;
            transition: border-color var(--transition);
        }
        .article-body .content-area a:hover {
            border-bottom-color: var(--primary);
        }

        /* Article Tags & Share */
        .article-tags-share {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }
        .article-tags {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .article-tags i {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-tags .tag {
            display: inline-block;
            background: var(--bg-light);
            padding: 0.25rem 0.75rem;
            border-radius: 16px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: background var(--transition), color var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-share span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-light);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* Article Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .sidebar-card h4 {
            font-size: 1rem;
            margin-bottom: 1rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--primary);
            display: inline-block;
        }
        .sidebar-card ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
        }
        .sidebar-card ul li a::before {
            content: '•';
            color: var(--primary);
            font-weight: 700;
        }

        /* ===== Error State ===== */
        .article-error {
            text-align: center;
            padding: var(--spacing-xl) 0;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-error i {
            font-size: 3.5rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .article-error h2 {
            font-size: 1.6rem;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }
        .article-error p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
        }
        .article-error .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* ===== Related Posts ===== */
        .related-section {
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card .card-img {
            height: 180px;
            overflow: hidden;
            background: var(--bg-light);
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
            border-radius: 0;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .related-card .card-body .card-category {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .related-card:hover .card-body h3 {
            color: var(--primary);
        }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-top: auto;
            padding-top: 0.5rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--secondary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: var(--spacing-xl) 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.9), rgba(0, 0, 0, 0.6));
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 550px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            cursor: pointer;
            border: none;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(211, 47, 47, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(211, 47, 47, 0.35);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.6);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.88rem;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.1rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: var(--bg-light);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--spacing-lg) 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-md);
            padding-bottom: var(--spacing-md);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .header-logo {
            margin-bottom: 1rem;
            font-size: 1.25rem;
        }
        .footer-brand .header-logo i,
        .footer-brand .header-logo span {
            color: var(--text-white);
            -webkit-text-fill-color: var(--text-white);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 380px;
            margin-bottom: 1.2rem;
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            border-color: var(--primary);
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 1.1rem;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: var(--accent);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== Mobile Navigation ===== */
        @media (max-width: 768px) {
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 1rem 1.5rem;
                gap: 0.25rem;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: transform 0.4s ease, opacity 0.4s ease, visibility 0.4s;
                z-index: 999;
                max-height: 70vh;
                overflow-y: auto;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .header-nav a {
                padding: 0.75rem 1rem;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .header-nav a.active {
                background: var(--primary);
                color: var(--text-white);
            }
            .menu-toggle {
                display: block;
            }
            .header-search input {
                width: 100px;
            }
            .header-search input:focus {
                width: 120px;
            }

            /* Article layout */
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }

            /* Footer */
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }

            /* Related */
            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-xl: 3rem;
                --spacing-lg: 2rem;
                --spacing-md: 1.25rem;
            }
            .header-logo span {
                font-size: 1.1rem;
            }
            .header-search {
                display: none;
            }
            .header-actions .btn {
                padding: 0.45rem 1rem;
                font-size: 0.82rem;
            }
            .article-hero {
                min-height: 240px;
                padding-top: calc(var(--header-height) + var(--spacing-lg));
            }
            .article-hero h1 {
                font-size: 1.35rem;
            }
            .article-hero .article-meta {
                gap: 0.75rem;
                font-size: 0.82rem;
                flex-direction: column;
            }
            .article-body {
                padding: var(--spacing-sm);
            }
            .article-body .content-area {
                font-size: 0.98rem;
            }
            .article-tags-share {
                flex-direction: column;
                align-items: flex-start;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section .btn-group {
                flex-direction: column;
                width: 100%;
            }
            .cta-section .btn-group .btn {
                width: 100%;
                justify-content: center;
            }
            .faq-question {
                padding: 0.9rem 1rem;
                font-size: 0.92rem;
            }
            .faq-answer {
                font-size: 0.88rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 220px;
                gap: 1.25rem;
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr 1fr;
                gap: 1rem;
            }
            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: var(--spacing-sm);
        }
        .mt-2 {
            margin-top: var(--spacing-md);
        }
        .mb-1 {
            margin-bottom: var(--spacing-sm);
        }
        .mb-2 {
            margin-bottom: var(--spacing-md);
        }
        .gap-1 {
            gap: var(--spacing-sm);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }