/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #d4a853;
            --primary-dark: #b8923e;
            --primary-light: #e8c87a;
            --secondary: #e74c3c;
            --secondary-dark: #c0392b;
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-elevated: #1a2236;
            --bg-nav: rgba(10, 14, 26, 0.75);
            --text-primary: #f1f1f1;
            --text-secondary: #a0a8b8;
            --text-muted: #6b7280;
            --border-color: rgba(212, 168, 83, 0.15);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 30px rgba(212, 168, 83, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-w: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-primary); }
        h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); }
        h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
        h3 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }
        h4 { font-size: 1.2rem; }
        p { color: var(--text-secondary); margin-bottom: 0.8rem; }

        /* ===== Container ===== */
        .container { width: 100%; max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Section Spacing ===== */
        .section { padding: 90px 0; }
        .section-sm { padding: 60px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 580px; margin: 0 auto; font-size: 1.05rem; }
        .section-divider { width: 60px; height: 3px; background: var(--primary); margin: 16px auto 20px; border-radius: 4px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 34px;
            border-radius: 50px; font-weight: 600; font-size: 0.95rem;
            cursor: pointer; transition: var(--transition); border: none;
            background: var(--primary); color: #0a0e1a; letter-spacing: 0.3px;
        }
        .btn:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(212, 168, 83, 0.25); color: #0a0e1a; }
        .btn:active { transform: translateY(0); }
        .btn-outline {
            background: transparent; border: 1.5px solid var(--primary); color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #0a0e1a; border-color: var(--primary); }
        .btn-secondary { background: var(--secondary); color: #fff; }
        .btn-secondary:hover { background: var(--secondary-dark); box-shadow: 0 8px 30px rgba(231, 76, 60, 0.25); color: #fff; }
        .btn-sm { padding: 10px 22px; font-size: 0.85rem; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.78rem;
            font-weight: 600; letter-spacing: 0.3px; background: rgba(212, 168, 83, 0.12);
            color: var(--primary); border: 1px solid rgba(212, 168, 83, 0.15);
        }
        .badge-red { background: rgba(231, 76, 60, 0.12); color: var(--secondary); border-color: rgba(231, 76, 60, 0.15); }
        .badge-green { background: rgba(46, 204, 113, 0.12); color: #2ecc71; border-color: rgba(46, 204, 113, 0.15); }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 28px;
            border: 1px solid var(--border-light); transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card:hover { border-color: rgba(212, 168, 83, 0.2); transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
        .card-img { border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 18px; }
        .card-img img { width: 100%; height: 200px; object-fit: cover; transition: var(--transition); }
        .card:hover .card-img img { transform: scale(1.04); }
        .card h3 { margin-bottom: 8px; font-size: 1.15rem; }
        .card p { font-size: 0.92rem; color: var(--text-secondary); }

        /* ===== Glass Navigation ===== */
        header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: var(--bg-nav); backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition); height: var(--nav-height);
        }
        header.scrolled {
            background: rgba(10, 14, 26, 0.95); box-shadow: 0 4px 30px rgba(0,0,0,0.5);
        }
        .nav-wrap { display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); }
        .nav-logo { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); letter-spacing: 0.5px; display: flex; align-items: center; gap: 8px; }
        .nav-logo span { color: var(--primary); }
        .nav-logo i { color: var(--primary); font-size: 1.3rem; }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            position: relative; padding: 8px 20px; border-radius: 50px;
            font-size: 0.92rem; font-weight: 500; color: var(--text-secondary);
            transition: var(--transition); letter-spacing: 0.2px;
        }
        .nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
        .nav-links a.active { color: var(--primary); background: rgba(212, 168, 83, 0.1); }
        .nav-cta .btn { padding: 10px 26px; font-size: 0.88rem; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; }
        .nav-toggle span { width: 26px; height: 2px; background: var(--text-primary); border-radius: 4px; transition: var(--transition); }

        /* Mobile Nav */
        @media (max-width: 820px) {
            .nav-links { display: none; position: absolute; top: var(--nav-height); left: 0; width: 100%; background: rgba(10,14,26,0.98); backdrop-filter: blur(14px); flex-direction: column; padding: 20px 24px; border-bottom: 1px solid var(--border-color); gap: 6px; }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 18px; }
            .nav-cta { display: none; }
            .nav-toggle { display: flex; }
            .nav-cta-mobile { display: block; margin-top: 10px; }
            .nav-cta-mobile .btn { width: 100%; justify-content: center; }
        }
        @media (min-width: 821px) { .nav-cta-mobile { display: none; } }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh; display: flex; align-items: center; position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding-top: var(--nav-height); overflow: hidden;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(10,14,26,0.85) 30%, rgba(10,14,26,0.5) 70%, rgba(10,14,26,0.3));
            z-index: 1;
        }
        .hero::after {
            content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 200px;
            background: linear-gradient(to top, var(--bg-dark), transparent); z-index: 1;
        }
        .hero-content { position: relative; z-index: 2; max-width: 820px; padding: 40px 0; }
        .hero-badge { margin-bottom: 20px; display: inline-block; }
        .hero h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); margin-bottom: 16px; letter-spacing: -0.5px; }
        .hero h1 span { color: var(--primary); }
        .hero p { font-size: clamp(1.05rem, 1.8vw, 1.25rem); color: var(--text-secondary); max-width: 640px; margin-bottom: 32px; line-height: 1.7; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; flex-wrap: wrap; }
        .hero-stat h3 { font-size: 2rem; color: var(--primary); }
        .hero-stat p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

        /* ===== Features Grid ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card { text-align: center; padding: 36px 24px; }
        .feature-card i { font-size: 2.4rem; color: var(--primary); margin-bottom: 18px; display: inline-block; }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.9rem; }
        @media (max-width: 768px) { .features-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 520px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== Category Section ===== */
        .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-card); border: 1px solid var(--border-light);
            transition: var(--transition); display: flex; align-items: center; padding: 32px 28px; gap: 24px;
        }
        .category-card:hover { border-color: rgba(212,168,83,0.2); transform: translateY(-3px); box-shadow: var(--shadow-card); }
        .category-card .cat-icon { width: 64px; height: 64px; border-radius: 50%; background: rgba(212,168,83,0.08); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .category-card .cat-icon i { font-size: 1.8rem; color: var(--primary); }
        .category-card .cat-info h3 { font-size: 1.1rem; margin-bottom: 4px; }
        .category-card .cat-info p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }
        .category-card .cat-arrow { margin-left: auto; color: var(--text-muted); font-size: 1.2rem; transition: var(--transition); }
        .category-card:hover .cat-arrow { color: var(--primary); transform: translateX(4px); }
        @media (max-width: 768px) { .category-grid { grid-template-columns: 1fr; } }

        /* ===== Post List ===== */
        .post-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .post-card .card-img img { height: 180px; }
        .post-card .post-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: 0.82rem; color: var(--text-muted); }
        .post-card .post-meta .badge { font-size: 0.72rem; padding: 2px 12px; }
        .post-card h3 { font-size: 1.05rem; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-card p { font-size: 0.88rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        @media (max-width: 768px) { .post-grid { grid-template-columns: 1fr; } }

        /* ===== Stats / Data ===== */
        .stats-section { background: var(--bg-card); border-top: 1px solid var(--border-light); border-bottom: 1px solid var(--border-light); }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
        .stat-item h3 { font-size: 2.6rem; color: var(--primary); margin-bottom: 4px; }
        .stat-item p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr 1fr; } }

        /* ===== 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-light); border-radius: var(--radius-sm);
            overflow: hidden; transition: var(--transition);
        }
        .faq-item.open { border-color: rgba(212,168,83,0.2); }
        .faq-q {
            padding: 18px 24px; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
            font-weight: 600; font-size: 1rem; color: var(--text-primary); user-select: none;
            transition: var(--transition);
        }
        .faq-q:hover { background: rgba(255,255,255,0.02); }
        .faq-q i { transition: var(--transition); color: var(--text-muted); font-size: 0.85rem; }
        .faq-item.open .faq-q i { transform: rotate(180deg); color: var(--primary); }
        .faq-a {
            padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7;
        }
        .faq-item.open .faq-a { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(212,168,83,0.06), rgba(231,76,60,0.04));
            border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-wrap { max-width: 620px; margin: 0 auto; }
        .cta-wrap h2 { margin-bottom: 16px; }
        .cta-wrap p { margin-bottom: 28px; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-card); border-top: 1px solid var(--border-light); padding: 60px 0 30px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .nav-logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; }
        .footer-col h4 { font-size: 0.95rem; margin-bottom: 18px; color: var(--text-primary); }
        .footer-col a { display: block; font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 10px; }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a { width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.04); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); border: 1px solid var(--border-light); transition: var(--transition); }
        .footer-social a:hover { background: rgba(212,168,83,0.12); color: var(--primary); border-color: rgba(212,168,83,0.2); }
        .footer-bottom { border-top: 1px solid var(--border-light); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: var(--text-muted); }
        @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

        /* ===== Empty State ===== */
        .empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
        .empty-state i { font-size: 2.4rem; margin-bottom: 16px; display: inline-block; color: var(--text-muted); opacity: 0.4; }
        .empty-state p { font-size: 1rem; }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-24 { margin-top: 24px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 1024px) {
            .hero-stats { gap: 24px; }
            .hero-stat h3 { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .cta-actions { flex-direction: column; }
            .cta-actions .btn { width: 100%; justify-content: center; }
            .section { padding: 60px 0; }
        }

        /* ===== Smooth reveal ===== */
        .reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
        .reveal.visible { opacity: 1; transform: translateY(0); }

        /* ===== Focus ===== */
        a:focus-visible, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 4px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2b4a7a;
            --accent: #f4a261;
            --accent-light: #f9c784;
            --bg-dark: #0a0a1a;
            --bg-dark-2: #12122a;
            --bg-light: #f8f9fa;
            --bg-card: #ffffff;
            --bg-glass: rgba(255, 255, 255, 0.06);
            --bg-glass-hover: rgba(255, 255, 255, 0.12);
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #ffffff;
            --text-muted: rgba(255, 255, 255, 0.6);
            --border-light: rgba(255, 255, 255, 0.10);
            --border-card: rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
            --shadow-glow: 0 0 40px rgba(230, 57, 70, 0.15);
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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: 1.65;
            color: var(--text-primary);
            background: var(--bg-dark);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 玻璃导航 ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 26, 0.60);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.20);
            transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        #header.scrolled {
            background: rgba(10, 10, 26, 0.90);
            border-bottom-color: rgba(255, 255, 255, 0.06);
            box-shadow: 0 4px 40px rgba(0, 0, 0, 0.40);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .nav-logo i {
            color: var(--primary);
            font-size: 20px;
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }
        .nav-links a:hover {
            color: var(--text-white);
            background: var(--bg-glass-hover);
        }
        .nav-links a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 20px rgba(230, 57, 70, 0.30);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
        }
        .nav-cta {
            flex-shrink: 0;
            margin-left: 12px;
        }
        .nav-cta-mobile {
            display: none;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.3px;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13.5px;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(230, 57, 70, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0px);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.25);
        }
        .btn-outline:hover {
            background: var(--bg-glass-hover);
            border-color: rgba(255, 255, 255, 0.45);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0px);
        }
        .btn-accent {
            background: var(--accent);
            color: #1a1a2e;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(244, 162, 97, 0.35);
        }

        /* ===== Hero ===== */
        .hero-category {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 0 80px;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-category-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.30;
            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-category-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(230, 57, 70, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(29, 53, 87, 0.30) 0%, transparent 50%),
                linear-gradient(180deg, rgba(10, 10, 26, 0.50) 0%, var(--bg-dark) 100%);
        }
        .hero-category-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }
        .hero-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            border-radius: 50px;
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
        }
        .hero-category-badge i {
            color: var(--primary);
        }
        .hero-category-content h1 {
            font-size: clamp(38px, 6vw, 72px);
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.12;
            letter-spacing: -1.5px;
            margin-bottom: 20px;
        }
        .hero-category-content h1 span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-category-content p {
            font-size: 18px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 640px;
            margin: 0 auto 36px;
        }
        .hero-category-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
        }
        .section-dark-2 {
            background: var(--bg-dark-2);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.8px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-dark .section-header h2 {
            color: var(--text-white);
        }
        .section-dark .section-header p {
            color: var(--text-muted);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            border-radius: 50px;
            background: rgba(230, 57, 70, 0.10);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 16px;
        }
        .section-dark .section-tag {
            background: rgba(230, 57, 70, 0.18);
            color: var(--primary-light);
        }

        /* ===== 分类频道卡片 ===== */
        .channel-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
        }
        .channel-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            cursor: pointer;
            border: 1px solid var(--border-card);
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: flex-end;
        }
        .channel-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }
        .channel-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .channel-card:hover img {
            transform: scale(1.08);
        }
        .channel-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(0, 0, 0, 0.75) 0%, transparent 60%);
        }
        .channel-card-info {
            position: relative;
            z-index: 2;
            padding: 20px 18px 18px;
            width: 100%;
        }
        .channel-card-info h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 4px;
        }
        .channel-card-info p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
        }
        .channel-card-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            z-index: 3;
            padding: 3px 12px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== 资讯卡片网格 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }
        .news-card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            flex-shrink: 0;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.06);
        }
        .news-card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.30);
        }
        .news-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 10px;
            transition: color var(--transition);
        }
        .news-card:hover .news-card-body h3 {
            color: var(--primary);
        }
        .news-card-body p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid rgba(0, 0, 0, 0.04);
            padding-top: 14px;
        }
        .news-card-meta span i {
            margin-right: 6px;
        }
        .news-card-meta a {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
        }
        .news-card-meta a:hover {
            color: var(--primary-dark);
        }

        /* ===== 热门排行 ===== */
        .rank-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-card);
            padding: 16px 22px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition);
            cursor: default;
        }
        .rank-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-sm);
            border-color: rgba(230, 57, 70, 0.15);
        }
        .rank-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            background: var(--bg-light);
            color: var(--text-light);
            flex-shrink: 0;
            transition: all var(--transition);
        }
        .rank-item:nth-child(1) .rank-num {
            background: var(--primary);
            color: #fff;
        }
        .rank-item:nth-child(2) .rank-num {
            background: #e85d04;
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-num {
            background: #f48c06;
            color: #fff;
        }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }
        .rank-info p {
            font-size: 13.5px;
            color: var(--text-light);
        }
        .rank-stat {
            font-size: 15px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
            background: rgba(230, 57, 70, 0.06);
            padding: 4px 14px;
            border-radius: 50px;
        }
        .rank-item:nth-child(1) .rank-stat {
            background: rgba(230, 57, 70, 0.12);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 20px;
            background: var(--bg-glass);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: var(--bg-glass-hover);
            transform: translateY(-4px);
        }
        .stat-item .num {
            font-size: clamp(36px, 5vw, 52px);
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.1;
            letter-spacing: -1px;
        }
        .stat-item .num span {
            color: var(--primary);
        }
        .stat-item .label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            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-card);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(230, 57, 70, 0.12);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            gap: 12px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(0, 0, 0, 0.02);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(230, 57, 70, 0.08) 0%, transparent 70%);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.8px;
            margin-bottom: 14px;
        }
        .cta-content p {
            font-size: 17px;
            color: var(--text-muted);
            margin-bottom: 32px;
            line-height: 1.6;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark-2);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            font-size: 20px;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 16px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.25);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-muted);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--text-white);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            margin-right: 6px;
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13.5px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 10px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 820px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 26, 0.98);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                padding: 24px 28px 32px;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
                pointer-events: none;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.50);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 14px 20px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                display: none;
            }
            .nav-cta-mobile {
                display: block;
                margin-top: 12px;
                padding-top: 16px;
                border-top: 1px solid var(--border-light);
            }
            .nav-cta-mobile .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .hero-category {
                min-height: 440px;
                padding: 100px 0 60px;
            }
            .hero-category-content h1 {
                font-size: clamp(30px, 8vw, 48px);
            }
            .hero-category-content p {
                font-size: 16px;
            }
            .section {
                padding: 56px 0;
            }
            .news-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
                gap: 18px;
            }
            .channel-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .rank-item {
                padding: 14px 16px;
                flex-wrap: wrap;
            }
            .rank-stat {
                font-size: 13px;
                padding: 3px 12px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-category {
                min-height: 380px;
                padding: 80px 0 48px;
            }
            .hero-category-content h1 {
                font-size: 28px;
            }
            .hero-category-content p {
                font-size: 15px;
            }
            .hero-category-actions {
                flex-direction: column;
                gap: 12px;
            }
            .hero-category-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .section {
                padding: 40px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .channel-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .channel-card {
                aspect-ratio: 3 / 2;
            }
            .channel-card-info h3 {
                font-size: 15px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-card-body {
                padding: 16px 18px 18px;
            }
            .news-card-body h3 {
                font-size: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item {
                padding: 20px 16px;
            }
            .stat-item .num {
                font-size: 28px;
            }
            .rank-list {
                gap: 10px;
            }
            .rank-item {
                padding: 12px 14px;
                gap: 12px;
            }
            .rank-num {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .rank-info h4 {
                font-size: 14px;
            }
            .rank-info p {
                font-size: 12.5px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px 14px;
                font-size: 14px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-actions {
                flex-direction: column;
                gap: 12px;
            }
            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 选中颜色 ===== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #dc2626;
            --color-primary-dark: #b91c1c;
            --color-primary-light: #f87171;
            --color-secondary: #1e293b;
            --color-secondary-light: #334155;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #0f172a;
            --color-bg-alt: #1e293b;
            --color-bg-card: #1e293b;
            --color-bg-card-hover: #262f42;
            --color-text: #f1f5f9;
            --color-text-muted: #94a3b8;
            --color-text-dim: #64748b;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: rgba(255, 255, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(220, 38, 38, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-section: 5rem;
            --container-max: 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: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== Header & Navigation ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
            transition: background var(--transition), box-shadow var(--transition);
            height: var(--header-height);
        }

        #header.scrolled {
            background: rgba(15, 23, 42, 0.95);
            box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
        }

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

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .nav-logo i {
            color: var(--color-primary);
            font-size: 1.5rem;
        }
        .nav-logo span {
            color: var(--color-primary);
        }
        .nav-logo:hover {
            opacity: 0.85;
            color: var(--color-text);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2.2rem;
        }
        .nav-links a {
            color: var(--color-text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            position: relative;
            padding: 0.25rem 0;
            transition: color var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-links a:hover {
            color: var(--color-text);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--color-text);
        }
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .nav-cta-mobile {
            display: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition);
            border: 1px solid transparent;
            background: var(--color-primary);
            color: #fff;
            text-decoration: none;
        }
        .btn:hover {
            background: var(--color-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-sm {
            padding: 0.45rem 1.2rem;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 0.85rem 2.4rem;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--color-border-light);
            color: var(--color-text);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--color-primary);
            color: var(--color-text);
        }
        .btn-accent {
            background: var(--color-accent);
            color: #0f172a;
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            color: #0f172a;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
            z-index: 1001;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .article-hero {
            padding: calc(var(--header-height) + 3rem) 0 3rem;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 41, 59, 0.88)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--color-border);
            position: relative;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, var(--color-bg), transparent 60%);
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero .hero-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(220, 38, 38, 0.2);
            border: 1px solid rgba(220, 38, 38, 0.3);
            color: var(--color-primary-light);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 1.2rem;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            max-width: 900px;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 1.2rem;
            color: var(--color-text);
        }
        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            color: var(--color-text-muted);
            font-size: 0.9rem;
        }
        .article-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-hero .hero-meta i {
            color: var(--color-primary-light);
        }
        .article-hero .hero-meta .category-tag {
            background: rgba(245, 158, 11, 0.15);
            color: var(--color-accent);
            padding: 0.15rem 0.8rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(245, 158, 11, 0.2);
        }

        /* ===== Article Body ===== */
        .article-body {
            padding: 3rem 0 2rem;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        .article-main {
            min-width: 0;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-content p {
            margin-bottom: 1.5rem;
        }
        .article-content img {
            margin: 2rem 0;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            width: 100%;
        }
        .article-content h2,
        .article-content h3 {
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: var(--color-text);
        }
        .article-content h2 {
            font-size: 1.6rem;
        }
        .article-content h3 {
            font-size: 1.25rem;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4rem;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4rem;
        }
        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: rgba(220, 38, 38, 0.06);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-muted);
            font-style: italic;
        }
        .article-content a {
            color: var(--color-primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--color-accent);
        }

        .article-sidebar {
            position: sticky;
            top: calc(var(--header-height) + 2rem);
            align-self: start;
        }
        .sidebar-card {
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .sidebar-card h4 {
            font-size: 1.05rem;
            margin-bottom: 1rem;
            padding-bottom: 0.6rem;
            border-bottom: 1px solid var(--color-border);
        }
        .sidebar-card .sidebar-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.5rem 0;
            color: var(--color-text-muted);
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            transition: color var(--transition);
        }
        .sidebar-card .sidebar-link:last-child {
            border-bottom: none;
        }
        .sidebar-card .sidebar-link:hover {
            color: var(--color-text);
        }
        .sidebar-card .sidebar-link i {
            color: var(--color-primary-light);
            width: 18px;
            text-align: center;
        }

        .article-not-found {
            text-align: center;
            padding: 4rem 0;
        }
        .article-not-found i {
            font-size: 3.5rem;
            color: var(--color-text-dim);
            margin-bottom: 1.5rem;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            margin-bottom: 0.8rem;
        }
        .article-not-found p {
            color: var(--color-text-muted);
            max-width: 480px;
            margin: 0 auto 1.5rem;
        }

        /* ===== Tags & Share ===== */
        .article-footer-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            padding: 1.5rem 0;
            margin-top: 2rem;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .article-tags .tag {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            padding: 0.2rem 0.9rem;
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            transition: all var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(220, 38, 38, 0.15);
            border-color: rgba(220, 38, 38, 0.3);
            color: var(--color-primary-light);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .article-share span {
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            transition: all var(--transition);
        }
        .article-share a:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        /* ===== Recommended ===== */
        .recommended-section {
            padding: var(--spacing-section) 0;
            background: var(--color-bg-alt);
        }
        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }
        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 700;
        }
        .section-header .section-sub {
            color: var(--color-text-muted);
            font-size: 0.95rem;
        }
        .rec-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .rec-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .rec-card:hover {
            border-color: rgba(220, 38, 38, 0.25);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .rec-card .card-img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            border-radius: 0;
        }
        .rec-card .card-body {
            padding: 1.2rem;
        }
        .rec-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .rec-card .card-body h4 a {
            color: var(--color-text);
        }
        .rec-card .card-body h4 a:hover {
            color: var(--color-primary-light);
        }
        .rec-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--color-text-dim);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-top: 0.3rem;
        }
        .rec-card .card-body .card-meta span {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--color-bg);
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item.active {
            border-color: rgba(220, 38, 38, 0.3);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.2rem 1.5rem;
            background: none;
            color: var(--color-text);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question i {
            color: var(--color-primary-light);
            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 0.4s ease;
            padding: 0 1.5rem;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--spacing-section) 0;
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.08), rgba(15, 23, 42, 0.95)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .cta-section p {
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }

        /* ===== Footer ===== */
        footer {
            background: var(--color-secondary);
            border-top: 1px solid var(--color-border);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .nav-logo {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
        }
        .footer-brand p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            max-width: 300px;
            margin-bottom: 1.2rem;
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
        }
        .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);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--color-text);
        }
        .footer-col a {
            display: block;
            color: var(--color-text-muted);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--color-primary-light);
        }
        .footer-col a i {
            margin-right: 0.4rem;
            width: 16px;
            text-align: center;
            color: var(--color-primary-light);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--color-text-dim);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 3rem;
                --header-height: 64px;
            }

            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(15, 23, 42, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                gap: 0.5rem;
                padding: 5rem 2rem 2rem;
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
                border-left: 1px solid var(--color-border);
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                font-size: 1.1rem;
                padding: 0.6rem 0;
            }
            .nav-cta {
                display: none;
            }
            .nav-cta-mobile {
                display: flex;
                margin-top: 1.5rem;
                width: 100%;
            }
            .nav-cta-mobile .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }

            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .hero-meta {
                gap: 1rem;
                font-size: 0.8rem;
            }

            .article-content {
                font-size: 1rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

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

            .cta-section h2 {
                font-size: 1.6rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .rec-grid {
                grid-template-columns: 1fr;
            }
            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .btn-group .btn {
                width: 100%;
                justify-content: center;
            }
        }

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