/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #4a6cf7;
            --primary-dark: #3451d1;
            --primary-light: #6b8aff;
            --secondary: #f7931e;
            --secondary-dark: #e07d0a;
            --accent: #ff6b6b;
            --bg-dark: #0f0e17;
            --bg-card: #ffffff;
            --bg-section: #f4f6fc;
            --bg-section-alt: #eef1f8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aa0;
            --border: #e2e6f0;
            --border-light: #f0f2f8;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --transition: 0.25s ease;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-h: 0px;
            --max-width: 1200px;
            --gap: 24px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: #f8f9fc;
            min-height: 100vh;
            display: flex;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.0rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.75rem; color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
            width: 100%;
        }

        /* ===== Sidebar Navigation (App Shell) ===== */
        .app-shell {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-dark);
            color: #fff;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition);
        }
        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-brand .logo-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.01em;
            line-height: 1.2;
        }
        .sidebar-brand .logo-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            color: rgba(255,255,255,0.5);
            letter-spacing: 0.06em;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: rgba(255,255,255,0.3);
            padding: 12px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; color: rgba(255,255,255,0.4); transition: color var(--transition); }
        .sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .sidebar-nav a:hover i { color: var(--primary-light); }
        .sidebar-nav a.active { background: rgba(74,108,247,0.2); color: #fff; }
        .sidebar-nav a.active i { color: var(--primary-light); }
        .sidebar-nav a:focus-visible { outline: 2px solid var(--primary-light); outline-offset: -2px; }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.3);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Mobile Top Bar ===== */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--bg-dark);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            color: #fff;
        }
        .mobile-topbar .logo-text {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
        }
        .mobile-topbar .logo-text small { font-size: 0.65rem; color: rgba(255,255,255,0.5); display: block; }
        .hamburger {
            width: 36px;
            height: 36px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: rgba(255,255,255,0.08);
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger:hover { background: rgba(255,255,255,0.15); }
        .hamburger span { display: block; width: 20px; height: 2px; background: #fff; border-radius: 2px; transition: all var(--transition); }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

        /* ===== Mobile Overlay ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.show { opacity: 1; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 90px;
            background: var(--bg-dark);
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.02);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,14,23,0.92) 0%, rgba(15,14,23,0.6) 70%, rgba(74,108,247,0.15) 100%);
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content { max-width: 680px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(74,108,247,0.2);
            color: var(--primary-light);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(74,108,247,0.25);
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.8rem; }
        .hero h1 { color: #fff; font-size: 3.0rem; margin-bottom: 16px; letter-spacing: -0.02em; }
        .hero h1 span { background: linear-gradient(135deg, var(--primary-light), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { color: rgba(255,255,255,0.7); font-size: 1.15rem; max-width: 560px; margin-bottom: 32px; line-height: 1.7; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.0rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(74,108,247,0.35); }
        .hero-actions .btn-secondary {
            background: rgba(255,255,255,0.1);
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 1.0rem;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.3); transform: translateY(-2px); }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .section-title { margin-bottom: 12px; }
        .section-sub { color: var(--text-muted); font-size: 1.05rem; max-width: 600px; margin-bottom: 40px; }
        .section-title-center { text-align: center; }
        .section-sub-center { margin-left: auto; margin-right: auto; text-align: center; }

        /* ===== Features / Core ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, var(--secondary), #ffb347); }
        .feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, var(--accent), #ff8e8e); }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .category-card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 0;
        }
        .category-card .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .category-card .card-body h3 { font-size: 1.1rem; margin-bottom: 6px; }
        .category-card .card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; flex: 1; }
        .category-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
        }
        .category-card .card-tag i { font-size: 0.7rem; transition: transform var(--transition); }
        .category-card:hover .card-tag i { transform: translateX(4px); }

        /* ===== News / Post List ===== */
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .news-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
        .news-item .news-thumb {
            width: 100px;
            height: 72px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-section);
        }
        .news-item .news-info { flex: 1; min-width: 0; }
        .news-item .news-info h4 { font-size: 1.0rem; margin-bottom: 4px; font-weight: 600; }
        .news-item .news-info h4 a { color: var(--text-primary); }
        .news-item .news-info h4 a:hover { color: var(--primary); }
        .news-item .news-excerpt { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-meta { display: flex; gap: 16px; font-size: 0.78rem; color: var(--text-muted); }
        .news-meta span { display: flex; align-items: center; gap: 4px; }
        .news-meta .category-badge {
            background: var(--bg-section);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .news-empty {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
            color: var(--text-muted);
            font-size: 1.0rem;
        }

        /* ===== Stats / Data ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }
        .stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 6px; }

        /* ===== 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-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text-primary);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover { background: var(--bg-section); }
        .faq-question i { color: var(--primary); font-size: 0.85rem; transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 0;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer { padding: 0 24px 20px; max-height: 300px; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
        }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 640px; margin: 0 auto; }
        .cta-content h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.7); font-size: 1.05rem; margin-bottom: 32px; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-actions .btn-cta {
            background: var(--secondary);
            color: #fff;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-actions .btn-cta:hover { background: var(--secondary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(247,147,30,0.35); }
        .cta-actions .btn-ghost {
            background: rgba(255,255,255,0.08);
            color: #fff;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 500;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-actions .btn-ghost:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.3); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 48px 0 32px;
            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: 32px;
        }
        .footer-brand .logo-text { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 8px; display: block; }
        .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.45); max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 14px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.88rem; transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== Misc ===== */
        .text-center { text-align: center; }
        .mb-0 { margin-bottom: 0; }
        .mt-8 { margin-top: 8px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .category-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .hero h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .mobile-topbar { display: flex; }
            .sidebar-overlay { display: block; pointer-events: none; }
            .sidebar-overlay.show { pointer-events: auto; }
            .main-content { margin-left: 0; }
            .hero { padding: 70px 0 60px; min-height: 380px; }
            .hero h1 { font-size: 2.0rem; }
            .hero p { font-size: 1.0rem; }
            .section { padding: 60px 0; }
            .features-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .news-item { flex-direction: column; padding: 16px; }
            .news-item .news-thumb { width: 100%; height: 140px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-content h2 { font-size: 1.7rem; }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary { padding: 12px 28px; font-size: 0.92rem; }
            .stat-number { font-size: 1.8rem; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .hero p { font-size: 0.92rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 20px 12px; }
            .section-title { font-size: 1.4rem; }
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
            .cta-actions { flex-direction: column; }
            .cta-actions .btn-cta,
            .cta-actions .btn-ghost { width: 100%; justify-content: center; }
            .mobile-topbar { padding: 10px 16px; }
            .news-item .news-thumb { height: 100px; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-sidebar: #0f172a;
            --bg-card: #ffffff;
            --bg-section-alt: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-sidebar: #cbd5e1;
            --text-sidebar-active: #ffffff;
            --border-color: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --header-height: 0px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        /* ===== 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);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; }

        /* ===== 侧边栏 / App Shell ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-sidebar);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.06);
            box-shadow: 2px 0 20px rgba(0,0,0,0.2);
        }
        .sidebar-brand {
            padding: 24px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-brand .logo-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            line-height: 1.3;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: rgba(255,255,255,0.3);
            padding: 8px 12px 12px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-sidebar);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            opacity: 0.7;
        }
        .sidebar-nav a:hover {
            background: rgba(255,255,255,0.07);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(37,99,235,0.3);
        }
        .sidebar-nav a.active i { opacity: 1; }
        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.3);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 40px 50px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
            max-width: 900px;
            margin: 0 auto;
        }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-banner .breadcrumb a {
            color: rgba(255,255,255,0.6);
            transition: color var(--transition);
        }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb span { color: rgba(255,255,255,0.3); }
        .article-banner .article-category {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            max-width: 800px;
        }
        .article-banner .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            flex-wrap: wrap;
        }
        .article-banner .article-meta i { margin-right: 6px; }

        /* ===== 文章正文 ===== */
        .article-body {
            padding: 50px 40px 60px;
            flex: 1;
        }
        .article-body .container {
            max-width: 900px;
            margin: 0 auto;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            line-height: 1.9;
            font-size: 1.05rem;
            color: var(--text-primary);
        }
        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--text-primary);
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 10px;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .article-content p {
            margin-bottom: 18px;
            color: var(--text-secondary);
        }
        .article-content ul, .article-content ol {
            margin-bottom: 18px;
            padding-left: 24px;
            color: var(--text-secondary);
        }
        .article-content ul li { list-style: disc; margin-bottom: 6px; }
        .article-content ol li { list-style: decimal; margin-bottom: 6px; }
        .article-content a { color: var(--primary); text-decoration: underline; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--bg-section-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content code {
            background: var(--bg-section-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: 'JetBrains Mono', monospace;
        }
        .article-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.95rem;
        }
        .article-content th, .article-content td {
            border: 1px solid var(--border-color);
            padding: 12px 16px;
            text-align: left;
        }
        .article-content th {
            background: var(--bg-section-alt);
            font-weight: 600;
            color: var(--text-primary);
        }
        .article-content td { color: var(--text-secondary); }

        /* ===== 文章未找到 ===== */
        .not-found-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 60px 48px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .not-found-card i {
            font-size: 3.5rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-card h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        .not-found-card .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-card .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.25);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-sidebar);
            color: var(--text-sidebar);
            padding: 50px 40px 30px;
            margin-top: auto;
        }
        .footer .container { max-width: 1200px; margin: 0 auto; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.5);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover { color: #fff; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.3);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-banner h1 { font-size: 2rem; }
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 100%;
                height: auto;
                position: relative;
                flex-direction: row;
                flex-wrap: wrap;
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: 0 2px 12px rgba(0,0,0,0.15);
            }
            .sidebar-brand {
                padding: 14px 20px;
                border-bottom: none;
                flex: 1;
            }
            .sidebar-nav {
                display: flex;
                padding: 8px 16px 12px;
                width: 100%;
                overflow-x: auto;
                gap: 6px;
                flex-wrap: nowrap;
                -webkit-overflow-scrolling: touch;
            }
            .sidebar-nav .nav-label { display: none; }
            .sidebar-nav a {
                white-space: nowrap;
                padding: 8px 16px;
                font-size: 0.85rem;
                flex-shrink: 0;
            }
            .sidebar-nav a i { display: none; }
            .sidebar-footer { display: none; }
            .main-content { margin-left: 0; }
            .article-banner { padding: 36px 20px 32px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-banner .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-body { padding: 24px 16px 40px; }
            .article-content { padding: 24px 20px; font-size: 1rem; }
            .article-content h2 { font-size: 1.3rem; }
            .article-content h3 { font-size: 1.1rem; }
            .footer { padding: 36px 20px 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .not-found-card { padding: 40px 24px; }
            .not-found-card h2 { font-size: 1.3rem; }
        }

        @media (max-width: 520px) {
            .sidebar-brand .logo-text { font-size: 0.95rem; }
            .sidebar-nav a { padding: 6px 12px; font-size: 0.78rem; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-content { padding: 20px 16px; }
            .article-content table { font-size: 0.82rem; }
            .article-content th, .article-content td { padding: 8px 10px; }
        }

        /* ===== 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-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }

/* roulang page: category1 */
/* ========== :root 设计变量 ========== */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --primary-bg: #eef2ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fde68a;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-sidebar: #0f172a;
            --bg-sidebar-hover: #1e293b;
            --text: #0f172a;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --sidebar-collapsed: 64px;
            --header-h: 0px;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-w: 1200px;
            --gap: 32px;
        }

        /* ========== 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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }

        /* ========== 容器 ========== */
        .container {
            width: 100%;
            max-width: var(--max-w);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== 侧边栏导航 ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            overflow-y: auto;
            transition: transform var(--transition), width var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.2);
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 12px 24px 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 20px;
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }
        .sidebar-logo .logo-text {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .sidebar .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: rgba(255, 255, 255, 0.3);
            padding: 0 12px 8px 12px;
            font-weight: 600;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(99, 102, 241, 0.35);
        }
        .sidebar-nav a.active i {
            color: #fff;
        }
        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: auto;
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.25);
            text-align: center;
        }

        /* ========== 主内容区 ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left var(--transition);
        }
        .page-header {
            background: var(--bg-sidebar);
            padding: 0 32px;
            height: 0;
            overflow: hidden;
        }

        /* 移动端汉堡按钮 */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--bg-sidebar);
            color: #fff;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            border: none;
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--bg-sidebar-hover);
        }

        /* ========== 分类页 Banner ========== */
        .category-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-sidebar);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .category-banner h1 {
            font-size: 2.6rem;
            color: #fff;
            margin-bottom: 12px;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .category-banner h1 i {
            color: var(--primary-light);
            margin-right: 12px;
        }
        .category-banner p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            line-height: 1.7;
        }
        .category-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            margin-bottom: 20px;
        }
        .category-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
        }
        .category-banner .breadcrumb a:hover {
            color: #fff;
        }
        .category-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.8);
        }
        .category-banner .breadcrumb i {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.3);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 64px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-header p {
            font-size: 1rem;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ========== 分类筛选标签 ========== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .filter-tabs .tab {
            padding: 8px 22px;
            border-radius: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-light);
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .filter-tabs .tab:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: var(--primary-bg);
        }
        .filter-tabs .tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
        }

        /* ========== 卡片网格 ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--border-light);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }
        .card-img .tag.hot {
            background: #ef4444;
        }
        .card-img .tag.new {
            background: #10b981;
        }
        .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .card-body .meta i {
            margin-right: 4px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text);
            text-decoration: none;
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-body .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .card-body .card-footer .author {
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .card-body .card-footer .author i {
            margin-right: 4px;
        }
        .card-body .card-footer .read-more {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .card-body .card-footer .read-more:hover {
            color: var(--primary-dark);
        }

        /* ========== 特色攻略区块 ========== */
        .featured-guides {
            background: var(--bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .featured-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .featured-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .featured-card .fc-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--border-light);
        }
        .featured-card .fc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .featured-card:hover .fc-img img {
            transform: scale(1.04);
        }
        .featured-card .fc-body {
            padding: 24px 28px 28px;
        }
        .featured-card .fc-body .fc-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.72rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .featured-card .fc-body h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .featured-card .fc-body h3 a {
            color: var(--text);
            text-decoration: none;
        }
        .featured-card .fc-body h3 a:hover {
            color: var(--primary);
        }
        .featured-card .fc-body p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .featured-card .fc-body .fc-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .featured-card .fc-body .fc-meta i {
            margin-right: 4px;
        }

        /* ========== 攻略分类列表 ========== */
        .guide-categories {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
            margin-top: 12px;
        }
        .guide-cat-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px 18px;
            text-align: center;
            transition: all var(--transition);
            cursor: default;
        }
        .guide-cat-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .guide-cat-item i {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 10px;
            display: block;
        }
        .guide-cat-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .guide-cat-item p {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            transition: color var(--transition);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.active i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-sidebar);
            position: relative;
            overflow: hidden;
            padding: 72px 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;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
            text-decoration: none;
        }
        .cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(99, 102, 241, 0.45);
            color: #fff;
        }
        .cta-btn i {
            font-size: 0.9rem;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--bg-sidebar);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
            flex-shrink: 0;
        }
        .footer .container {
            max-width: var(--max-w);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.45);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.82rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-toggle {
                display: flex;
            }
            .category-banner {
                padding: 60px 0 42px;
                min-height: 220px;
            }
            .category-banner h1 {
                font-size: 1.8rem;
            }
            .category-banner p {
                font-size: 0.95rem;
            }
            .section {
                padding: 44px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .guide-categories {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .category-banner h1 {
                font-size: 1.4rem;
            }
            .category-banner h1 i {
                margin-right: 6px;
            }
            .category-banner .breadcrumb {
                font-size: 0.75rem;
                flex-wrap: wrap;
            }
            .filter-tabs .tab {
                padding: 6px 16px;
                font-size: 0.8rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .guide-categories {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .guide-cat-item {
                padding: 14px 12px;
            }
            .guide-cat-item i {
                font-size: 1.3rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .featured-card .fc-body {
                padding: 18px 20px 22px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px 14px;
            }
            .cta-btn {
                padding: 12px 28px;
                font-size: 0.92rem;
            }
            .footer {
                padding: 32px 0 24px;
            }
        }

        /* 遮罩层 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            backdrop-filter: blur(2px);
        }
        .sidebar-overlay.show {
            display: block;
        }

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

        /* ========== 滚动条美化 ========== */
        .sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }
        .sidebar::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }