/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #818CF8;
            --primary-bg: #EEF2FF;
            --secondary: #10B981;
            --secondary-dark: #059669;
            --secondary-light: #6EE7B7;
            --accent: #F59E0B;
            --bg-body: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #0F172A;
            --bg-dark-card: #1E293B;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --text-white: #FFFFFF;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 48px rgba(0,0,0,0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== 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-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: var(--radius-sm); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
        button { cursor: pointer; border: none; background: none; }
        button:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); letter-spacing: -0.02em; }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); letter-spacing: -0.01em; }
        h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 0.8rem; color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 620px; margin: 0 auto; color: var(--text-muted); font-size: 1.05rem; }
        .text-center { text-align: center; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .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);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25); }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.2);
        }
        .btn-secondary:active { transform: translateY(0); }
        .btn-white {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
        }
        .btn-white:hover {
            background: var(--primary-bg);
            border-color: var(--primary-bg);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255,255,255,0.25);
        }
        .btn-lg { padding: 16px 38px; font-size: 1.05rem; }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            letter-spacing: 0.02em;
        }
        .badge-green { background: #D1FAE5; color: #065F46; }
        .badge-yellow { background: #FEF3C7; color: #92400E; }
        .badge-red { background: #FEE2E2; color: #991B1B; }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .card-body { padding: 24px; }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            padding: 4px 6px;
            border-radius: 50px;
            border: 1px solid var(--border);
        }
        .nav-panel a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-panel a i { font-size: 0.9rem; }
        .nav-panel a:hover { color: var(--primary); background: rgba(79,70,229,0.08); }
        .nav-panel a.active {
            background: var(--bg-card);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .nav-cta { margin-left: 12px; }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            border: 1px solid var(--border);
            cursor: pointer;
        }
        .nav-toggle:hover { background: var(--border); }

        /* ===== Hero ===== */
        .hero {
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--bg-dark);
            margin-top: var(--header-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.4;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg { transform: scale(1.0); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.6) 50%, rgba(79,70,229,0.25) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: 60px 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.15);
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .hero-badge i { color: var(--secondary-light); }
        .hero h1 { color: var(--text-white); margin-bottom: 20px; }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--primary-light), var(--secondary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
        .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat h3 { color: var(--text-white); font-size: 1.8rem; margin-bottom: 2px; }
        .hero-stat p { color: rgba(255,255,255,0.6); font-size: 0.9rem; margin: 0; }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 18px;
            background: var(--primary-bg);
            color: var(--primary);
        }
        .feature-card h3 { margin-bottom: 10px; font-size: 1.15rem; }
        .feature-card p { font-size: 0.95rem; color: var(--text-muted); margin: 0; }

        /* ===== Category Intro ===== */
        .category-intro {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            align-items: center;
            gap: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .category-intro-img {
            flex: 0 0 45%;
            min-height: 280px;
            background: url('/assets/images/coverpic/cover-2.png') center center / cover no-repeat;
        }
        .category-intro-body { flex: 1; padding: 40px 40px 40px 0; }
        .category-intro-body .badge { margin-bottom: 12px; }
        .category-intro-body h2 { margin-bottom: 14px; }
        .category-intro-body p { margin-bottom: 20px; max-width: 480px; }
        @media (max-width: 768px) {
            .category-intro { flex-direction: column; }
            .category-intro-img { flex: auto; width: 100%; min-height: 200px; }
            .category-intro-body { padding: 24px; }
        }

        /* ===== Latest Posts ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .post-card .card-img-wrap { position: relative; overflow: hidden; }
        .post-card .card-img { transition: transform 0.5s ease; aspect-ratio: 16/10; }
        .post-card:hover .card-img { transform: scale(1.05); }
        .post-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(8px);
            color: var(--text-white);
            font-size: 0.75rem;
            font-weight: 600;
        }
        .post-card .card-body { padding: 20px; }
        .post-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.4; }
        .post-card .card-body h3 a { color: var(--text-primary); }
        .post-card .card-body h3 a:hover { color: var(--primary); }
        .post-card .card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
        .post-meta i { margin-right: 4px; }
        .empty-posts {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .empty-posts i { font-size: 2.4rem; color: var(--border); margin-bottom: 16px; display: block; }

        /* ===== Stats / Data ===== */
        .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: 0.08;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 32px;
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .stat-item h3 { color: var(--text-white); font-size: 2.4rem; margin-bottom: 4px; }
        .stat-item p { color: rgba(255,255,255,0.6); font-size: 0.95rem; margin: 0; }
        .stat-item .stat-icon { font-size: 2rem; color: var(--primary-light); margin-bottom: 12px; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--primary-bg); }
        .faq-question i { color: var(--primary); font-size: 1.1rem; transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 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: 1; text-align: center; max-width: 640px; margin: 0 auto; }
        .cta-content h2 { color: var(--text-white); margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.85); margin-bottom: 32px; font-size: 1.05rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            padding: 48px 0 28px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 12px; }
        .footer-brand p { color: rgba(255,255,255,0.5); font-size: 0.9rem; max-width: 300px; }
        .footer-col h4 { color: var(--text-white); font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-social { display: flex; gap: 12px; }
        .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: all var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-panel {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 20px;
                border-radius: 0;
                border: none;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                gap: 8px;
                align-items: stretch;
            }
            .nav-panel.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-panel a {
                padding: 12px 20px;
                border-radius: var(--radius-sm);
                justify-content: center;
            }
            .nav-cta { margin: 8px 0 0; }
            .nav-toggle { display: block; }
            .hero { min-height: 80vh; }
            .hero-stats { gap: 24px; }
            .hero-stat h3 { font-size: 1.4rem; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .section { padding: 48px 0; }
            .hero-content { padding: 40px 0; }
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .features-grid { grid-template-columns: 1fr; }
            .post-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-body); }
        ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        /* ===== Selection ===== */
        ::selection { background: var(--primary); color: var(--text-white); }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-gradient: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
            --accent: #fd79a8;
            --accent-dark: #e84393;
            --bg-body: #f8f9fe;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-section-alt: #f0effb;
            --text-primary: #2d3436;
            --text-secondary: #636e72;
            --text-muted: #b2bec3;
            --text-white: #ffffff;
            --border: #e8e8f0;
            --border-light: #f0f0f8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
            --shadow-md: 0 8px 24px rgba(108, 92, 231, 0.12);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.16);
            --shadow-hover: 0 12px 36px rgba(108, 92, 231, 0.20);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-body);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            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-h);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            white-space: nowrap;
            transition: var(--transition);
        }
        .logo i { font-size: 26px; color: var(--primary); }
        .logo span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { transform: scale(1.02); }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
        }
        .nav-panel a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-panel a i { margin-right: 6px; font-size: 14px; }
        .nav-panel a:hover { color: var(--primary); background: rgba(108, 92, 231, 0.08); }
        .nav-panel a.active { color: var(--primary); background: rgba(108, 92, 231, 0.12); font-weight: 600; }
        .nav-cta { margin-left: 12px; }
        .nav-toggle { display: none; font-size: 24px; color: var(--text-primary); padding: 6px 10px; border-radius: var(--radius-sm); background: var(--bg-section-alt); }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn i { font-size: 16px; }
        .btn-primary { background: var(--primary-gradient); color: #fff; border-color: var(--primary); }
        .btn-primary:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); color: #fff; border-color: var(--primary-dark); }
        .btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-sm { padding: 8px 18px; font-size: 13px; border-radius: var(--radius-sm); }
        .btn-lg { padding: 16px 36px; font-size: 17px; border-radius: var(--radius-lg); }

        /* ===== Page Hero / Banner ===== */
        .page-banner {
            margin-top: var(--header-h);
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            text-align: center;
            isolation: isolate;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.88) 0%, rgba(108, 92, 231, 0.70) 100%);
            z-index: 1;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 {
            font-size: 36px;
            color: #fff;
            margin-bottom: 12px;
            text-shadow: 0 2px 16px rgba(0,0,0,0.3);
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            flex-wrap: wrap;
        }
        .page-banner .breadcrumb a { color: var(--primary-light); }
        .page-banner .breadcrumb a:hover { color: #fff; }
        .page-banner .breadcrumb .sep { color: rgba(255,255,255,0.4); }

        /* ===== 文章页布局 ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 48px;
            align-items: start;
        }
        .article-main { min-width: 0; }

        /* 文章头部信息 */
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-gradient);
            color: #fff;
        }
        .article-meta .badge i { font-size: 12px; }
        .article-meta .date,
        .article-meta .author {
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-meta .date i,
        .article-meta .author i { font-size: 13px; }
        .article-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .article-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 文章正文 */
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-body .content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .content p {
            margin-bottom: 20px;
        }
        .article-body .content h2 {
            font-size: 24px;
            margin-top: 36px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-body .content h3 {
            font-size: 20px;
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body .content li {
            margin-bottom: 8px;
            list-style: disc;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-section-alt);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content a { color: var(--primary); text-decoration: underline; }
        .article-body .content a:hover { color: var(--primary-dark); }

        /* 文章标签/分享 */
        .article-footer-bar {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 13px;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .article-tags .tag i { font-size: 12px; color: var(--primary-light); }
        .article-tags .tag:hover { background: var(--primary); color: #fff; }
        .article-tags .tag:hover i { color: #fff; }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            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-section-alt);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 18px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-primary);
        }
        .sidebar-card h3 i { color: var(--primary); font-size: 18px; }
        .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a .num {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-section-alt);
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
        }
        .sidebar-list a .num.top { background: var(--primary-gradient); color: #fff; }
        .sidebar-list a .text { flex: 1; font-size: 14px; color: var(--text-secondary); line-height: 1.4; }
        .sidebar-list a .text strong { display: block; color: var(--text-primary); font-weight: 600; margin-bottom: 2px; }
        .sidebar-list a:hover .text { color: var(--primary); }
        .sidebar-list a:hover .text strong { color: var(--primary); }

        .sidebar-cats { display: flex; flex-direction: column; gap: 6px; }
        .sidebar-cats a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .sidebar-cats a i { width: 20px; color: var(--primary-light); font-size: 14px; }
        .sidebar-cats a:hover { background: var(--bg-section-alt); color: var(--primary); padding-left: 20px; }
        .sidebar-cats a.active { background: rgba(108, 92, 231, 0.1); color: var(--primary); font-weight: 600; }

        .sidebar-cta {
            background: var(--primary-gradient);
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h3 { color: #fff; margin-bottom: 8px; }
        .sidebar-cta h3 i { color: rgba(255,255,255,0.9); }
        .sidebar-cta p { font-size: 14px; opacity: 0.85; margin-bottom: 16px; }
        .sidebar-cta .btn { background: #fff; color: var(--primary); border-color: #fff; }
        .sidebar-cta .btn:hover { background: transparent; color: #fff; border-color: #fff; }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-section-alt);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 { font-size: 28px; }
        .related-section .section-title p { color: var(--text-muted); margin-top: 8px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--primary-gradient);
            color: #fff;
        }
        .related-card .card-body { padding: 20px; }
        .related-card .card-body h4 { font-size: 16px; margin-bottom: 6px; }
        .related-card .card-body h4 a { color: var(--text-primary); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 14px; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body .meta { display: flex; align-items: center; gap: 12px; margin-top: 12px; font-size: 13px; color: var(--text-muted); }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .not-found-box i { font-size: 64px; color: var(--text-muted); margin-bottom: 16px; }
        .not-found-box h2 { font-size: 28px; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--primary-light); }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); }
        .footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-social { display: flex; gap: 12px; margin-top: 8px; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 18px;
            transition: var(--transition);
            padding: 0;
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; }
            .nav-panel {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                border-top: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                align-items: stretch;
            }
            .nav-panel.open { transform: translateY(0); opacity: 1; visibility: visible; }
            .nav-panel a { padding: 12px 16px; border-radius: var(--radius-sm); }
            .nav-cta { margin-left: 0; margin-top: 8px; }
            .nav-toggle { display: flex; align-items: center; justify-content: center; }

            .page-banner { padding: 60px 0 40px; }
            .page-banner h1 { font-size: 26px; }

            .article-title { font-size: 24px; }
            .article-body { padding: 24px; }
            .article-body .content { font-size: 15px; }
            .article-body .content h2 { font-size: 20px; }
            .article-body .content h3 { font-size: 18px; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }

            .related-grid { grid-template-columns: 1fr; }
            .related-section { padding: 40px 0; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
        }

        @media (max-width: 520px) {
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .page-banner h1 { font-size: 20px; }
            .article-title { font-size: 20px; }
            .article-body { padding: 16px; }
            .article-meta { gap: 10px; }
            .sidebar-card { padding: 20px; }
            .btn { padding: 10px 20px; font-size: 14px; }
        }

        /* ===== 辅助 ===== */
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --accent: #00cec9;
            --bg: #0f0e1a;
            --bg-card: #1a1833;
            --bg-elevated: #221f3a;
            --bg-hero: #0b0a16;
            --text: #f0eff5;
            --text-weak: #8b87a8;
            --text-muted: #69668a;
            --border: #2d2a4a;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.40);
            --shadow-hover: 0 14px 40px rgba(108, 92, 231, 0.25);
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1220px;
            --header-h: 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #fff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(15, 14, 26, 0.85);
            backdrop-filter: blur(18px) saturate(1.2);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .site-header .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.3px;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .logo:hover i {
            transform: scale(1.08) rotate(-4deg);
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(135deg, #fff 30%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-panel a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-panel a i {
            font-size: 0.88rem;
        }
        .nav-panel a:hover {
            color: #fff;
            background: rgba(108, 92, 231, 0.15);
        }
        .nav-panel a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 18px rgba(108, 92, 231, 0.35);
        }
        .nav-panel .nav-cta {
            margin-left: 10px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.45);
            color: #fff;
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            color: #fff;
            background: rgba(108, 92, 231, 0.08);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 6px 10px;
            cursor: pointer;
            border-radius: var(--radius-xs);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* ===== Hero / Banner (分类页) ===== */
        .category-hero {
            padding: 120px 0 80px;
            background: var(--bg-hero);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            z-index: 0;
            filter: saturate(0.6) brightness(0.7);
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(108, 92, 231, 0.25) 0%, transparent 70%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 30px;
            background: rgba(108, 92, 231, 0.20);
            border: 1px solid rgba(108, 92, 231, 0.25);
            font-size: 0.82rem;
            color: var(--primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }
        .category-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.15rem;
            color: var(--text-weak);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .category-hero .hero-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 16px;
            border-radius: 30px;
            background: rgba(108, 92, 231, 0.12);
            font-size: 0.80rem;
            font-weight: 600;
            color: var(--primary-light);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-weak);
            max-width: 640px;
            margin-bottom: 48px;
            line-height: 1.8;
        }
        .text-center {
            text-align: center;
        }
        .text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 卡片网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.20);
        }
        .card:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 92, 231, 0.30);
            box-shadow: var(--shadow-hover);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            background: rgba(108, 92, 231, 0.15);
            color: var(--primary-light);
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .card p {
            font-size: 0.93rem;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(0, 206, 201, 0.12);
            color: var(--accent);
            margin-top: 12px;
        }

        /* ===== 图文卡片 (带封面) ===== */
        .cover-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
        }
        .cover-card:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 92, 231, 0.25);
            box-shadow: var(--shadow-hover);
        }
        .cover-card .cover-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            border-radius: 0;
            transition: var(--transition);
        }
        .cover-card:hover .cover-img {
            transform: scale(1.02);
        }
        .cover-card .cover-body {
            padding: 20px 22px 24px;
        }
        .cover-card .cover-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .cover-card .cover-body p {
            font-size: 0.90rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .cover-card .cover-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.80rem;
            color: var(--text-muted);
        }
        .cover-card .cover-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .cover-card .cover-meta .badge {
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.70rem;
            font-weight: 600;
            background: rgba(253, 121, 168, 0.15);
            color: var(--secondary);
        }

        /* ===== 步骤/流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            border-color: rgba(108, 92, 231, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-num {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            background: var(--primary);
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 6px 20px rgba(108, 92, 231, 0.30);
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ===== 数据/统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(108, 92, 231, 0.25);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .stat-label {
            font-size: 0.90rem;
            color: var(--text-weak);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.20);
        }
        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.02rem;
            color: #fff;
        }
        .faq-item .faq-q i {
            color: var(--primary-light);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-item .faq-a {
            margin-top: 12px;
            font-size: 0.93rem;
            color: var(--text-weak);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-hero);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.12), rgba(253, 121, 168, 0.06));
            border: 1px solid rgba(108, 92, 231, 0.20);
            border-radius: var(--radius);
            padding: 60px 40px;
            text-align: center;
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-weak);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-box .btn {
            font-size: 1.05rem;
            padding: 14px 38px;
        }

        /* ===== 标签列表 ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-list .tag {
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.84rem;
            font-weight: 500;
            background: rgba(108, 92, 231, 0.08);
            border: 1px solid var(--border);
            color: var(--text-weak);
            transition: var(--transition);
        }
        .tag-list .tag:hover {
            background: rgba(108, 92, 231, 0.18);
            border-color: var(--primary-light);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.25rem;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.90rem;
            color: var(--text-weak);
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.90rem;
            color: var(--text-weak);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 6px;
        }
        .footer-social a {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            color: var(--text-weak);
            padding: 0;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            padding: 0;
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.84rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-weak);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .stats-grid,
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .category-hero h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-panel {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(15, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: var(--shadow);
                align-items: stretch;
            }
            .nav-panel.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-panel a {
                padding: 12px 18px;
                border-radius: var(--radius-sm);
                justify-content: center;
            }
            .nav-panel .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .nav-panel .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }

            .category-hero {
                padding: 100px 0 60px;
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid,
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .steps-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .card {
                padding: 20px 18px;
            }
        }

        /* ===== 辅助 ===== */
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }