/* roulang page: index */
/* ========== Design Variables ========== */
        :root {
            --primary: #0d0d1a;
            --primary-light: #1a1a35;
            --primary-dark: #080812;
            --accent: #f0a030;
            --accent-hover: #e89520;
            --accent-glow: rgba(240, 160, 48, 0.15);
            --accent-gradient: linear-gradient(135deg, #f0a030 0%, #ff6b35 100%);
            --bg-body: #0a0a14;
            --bg-card: #12122a;
            --bg-card-hover: #1a1a3a;
            --bg-surface: #0f0f20;
            --text-primary: #ffffff;
            --text-secondary: #c8c8e0;
            --text-muted: #8888aa;
            --text-accent: #f0a030;
            --border-color: #2a2a4a;
            --border-accent: rgba(240, 160, 48, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
            --shadow-accent: 0 4px 24px rgba(240, 160, 48, 0.2);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --sidebar-width: 240px;
            --header-height: 64px;
            --max-width: 1280px;
        }

        /* ========== Reset & Base ========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }
        a { color: var(--text-accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-hover); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }
        p { margin-bottom: 0.5rem; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        .container-wide {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== Sidebar Layout ========== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-color);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .sidebar-brand {
            padding: 24px 20px 20px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent-gradient);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.2;
        }
        .sidebar-brand .brand-text span { color: var(--text-accent); }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
        }
        .sidebar-nav .nav-section-title {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            padding: 12px 12px 8px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            transition: all var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1rem; color: var(--text-muted); transition: color var(--transition); }
        .sidebar-nav a:hover { background: rgba(240, 160, 48, 0.08); color: var(--text-primary); }
        .sidebar-nav a:hover i { color: var(--text-accent); }
        .sidebar-nav a.active {
            background: var(--accent-glow);
            color: var(--text-accent);
            box-shadow: inset 3px 0 0 var(--accent);
        }
        .sidebar-nav a.active i { color: var(--text-accent); }
        .sidebar-nav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ========== Main Content ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            background: var(--bg-body);
        }

        /* ========== Mobile Header ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--primary);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .brand-text {
            font-size: 1rem;
            font-weight: 800;
            color: var(--text-primary);
        }
        .mobile-header .brand-text span { color: var(--text-accent); }
        .mobile-header .menu-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-size: 1.3rem;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: background var(--transition);
        }
        .mobile-header .menu-btn:hover { background: var(--bg-card); }
        .mobile-header .menu-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

        /* ========== Overlay ========== */
        .sidebar-overlay {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.6);
            z-index: 999;
            display: none;
            opacity: 0;
            transition: opacity 0.3s ease;
            backdrop-filter: blur(4px);
        }
        .sidebar-overlay.open { display: block; opacity: 1; }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--primary-dark);
            overflow: hidden;
            min-height: 520px;
            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: 0.3;
            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(13,13,26,0.92) 0%, rgba(13,13,26,0.7) 50%, rgba(13,13,26,0.5) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-glow);
            border: 1px solid var(--border-accent);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-accent);
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }
        .hero-badge i { font-size: 0.7rem; }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 30%, var(--text-accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            line-height: 1.2;
        }
        .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
        .btn-primary {
            background: var(--accent-gradient);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(240, 160, 48, 0.35);
            color: #fff;
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover {
            background: var(--bg-card);
            border-color: var(--text-muted);
            color: var(--text-primary);
            transform: translateY(-2px);
        }
        .btn-secondary:active { transform: translateY(0); }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat .stat-num {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--text-accent);
            line-height: 1;
        }
        .hero-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== Sections Common ========== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-surface);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-accent);
            margin-bottom: 8px;
        }

        /* ========== Features / Cards Grid ========== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: all var(--transition);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-accent);
        }
        .feature-card .card-icon {
            width: 52px;
            height: 52px;
            background: var(--accent-glow);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--text-accent);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ========== Category Cards ========== */
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: flex-end;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-accent);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover img { transform: scale(1.05); }
        .category-card .card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(13,13,26,0.85) 0%, rgba(13,13,26,0.1) 60%);
        }
        .category-card .card-body {
            position: relative;
            z-index: 2;
            padding: 24px;
            width: 100%;
        }
        .category-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }
        .category-card .card-body p {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
        }
        .category-card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: var(--accent);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 700;
            border-radius: 50px;
            margin-bottom: 8px;
        }

        /* ========== Content / News List ========== */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .content-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: all var(--transition);
            align-items: flex-start;
        }
        .content-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-accent);
            transform: translateX(4px);
        }
        .content-item .item-thumb {
            width: 100px;
            height: 72px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary-light);
        }
        .content-item .item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .content-item .item-info { flex: 1; min-width: 0; }
        .content-item .item-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-item .item-info .item-meta {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .content-item .item-info .item-meta span { display: flex; align-items: center; gap: 4px; }
        .content-item .item-info .item-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-item .item-link {
            flex-shrink: 0;
            align-self: center;
        }
        .content-item .item-link a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--accent-glow);
            color: var(--text-accent);
            transition: all var(--transition);
        }
        .content-item .item-link a:hover { background: var(--accent); color: #fff; }

        /* ========== Stats / Numbers ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--text-accent);
            margin-bottom: 12px;
        }
        .stat-card .stat-num {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--text-primary);
            line-height: 1;
            margin-bottom: 4px;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ========== Steps / Process ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 16%;
            right: 16%;
            height: 2px;
            background: linear-gradient(90deg, var(--border-accent), var(--border-color), var(--border-accent));
            z-index: 0;
        }
        .step-card {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }
        .step-card .step-num {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: var(--accent-gradient);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 0 0 4px var(--bg-body), 0 0 0 6px var(--border-accent);
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--border-accent); }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            transition: color var(--transition);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::before {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--text-accent);
            transition: transform 0.3s ease;
        }
        .faq-item[open] summary::before { transform: rotate(180deg); }
        .faq-item summary:hover { color: var(--text-accent); }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .cta-content p {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 32px;
        }
        .cta-content .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .footer-brand .brand-text span { color: var(--text-accent); }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--text-accent); }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--text-accent); }

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

        @media (max-width: 768px) {
            :root { --sidebar-width: 0px; }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.open { transform: translateX(0); }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: var(--header-height); }
            .hero { padding: 60px 0 48px; min-height: auto; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat .stat-num { font-size: 1.4rem; }
            .section { padding: 48px 0; }
            .section-header h2 { font-size: 1.6rem; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .steps-grid { grid-template-columns: 1fr; gap: 24px; }
            .steps-grid::before { display: none; }
            .step-card .step-num { width: 48px; height: 48px; font-size: 1.2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .content-item { flex-direction: column; padding: 16px; }
            .content-item .item-thumb { width: 100%; height: 140px; }
            .content-item .item-link { align-self: flex-end; }
            .cta-section { padding: 48px 0; }
            .cta-content h2 { font-size: 1.6rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.6rem; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 20px 12px; }
            .stat-card .stat-num { font-size: 1.6rem; }
            .feature-card { padding: 24px 20px; }
            .category-card { aspect-ratio: 3 / 2; }
            .section-header h2 { font-size: 1.4rem; }
            .faq-item summary { padding: 14px 16px; font-size: 0.92rem; }
            .faq-item .faq-answer { padding: 0 16px 14px; }
            .sidebar { width: 100%; }
            .sidebar-brand { padding: 16px; }
        }

        /* ========== Utility ========== */
        .text-accent { color: var(--text-accent); }
        .mt-12 { margin-top: 12px; }
        .mb-12 { margin-bottom: 12px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .text-center { text-align: center; }
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .empty-state i { font-size: 2rem; margin-bottom: 12px; display: block; color: var(--text-muted); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --secondary-dark: #e84393;
            --accent: #fdcb6e;
            --bg-body: #0f0e1a;
            --bg-card: #1a1930;
            --bg-card-hover: #222145;
            --bg-sidebar: #12102a;
            --bg-surface: #1e1d3a;
            --text-primary: #f0f0f5;
            --text-secondary: #b0b0c8;
            --text-muted: #7a7a9a;
            --border-color: #2d2b50;
            --border-light: #3d3b60;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --sidebar-collapsed: 68px;
            --header-height: 0px;
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            overflow-x: hidden;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: #fff; }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; color: inherit; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: #fff; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

        /* ===== Sidebar Navigation ===== */
        .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-sidebar); border-right: 1px solid var(--border-color);
            display: flex; flex-direction: column; z-index: 1000;
            transition: transform 0.3s ease, width 0.3s ease;
            overflow-y: auto; overflow-x: hidden;
        }
        .sidebar-logo {
            display: flex; align-items: center; gap: 12px; padding: 24px 20px 20px;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-logo .brand-text {
            font-size: 1.25rem; font-weight: 800; color: #fff; letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .sidebar-logo .brand-text span { font-weight: 400; -webkit-text-fill-color: var(--text-secondary); }
        .sidebar-logo .logo-icon {
            width: 38px; height: 38px; border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex; align-items: center; justify-content: center;
            font-size: 1.2rem; color: #fff; flex-shrink: 0;
        }
        .sidebar-nav { padding: 16px 12px; flex: 1; }
        .nav-section-title {
            font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1.5px;
            color: var(--text-muted); padding: 8px 12px 6px; font-weight: 600;
        }
        .sidebar-nav a {
            display: flex; align-items: center; gap: 14px; padding: 12px 16px;
            border-radius: var(--radius-sm); color: var(--text-secondary);
            font-size: 0.95rem; font-weight: 500; transition: var(--transition);
            margin-bottom: 2px; position: relative;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; color: var(--text-muted); transition: var(--transition); }
        .sidebar-nav a:hover { background: var(--bg-card); color: #fff; }
        .sidebar-nav a:hover i { color: var(--primary-light); }
        .sidebar-nav a.active {
            background: linear-gradient(135deg, rgba(108,92,231,0.25), rgba(253,121,168,0.15));
            color: #fff; border: 1px solid rgba(108,92,231,0.3);
        }
        .sidebar-nav a.active i { color: var(--primary-light); }
        .sidebar-nav a.active::before {
            content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
            width: 3px; height: 24px; border-radius: 0 4px 4px 0;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
        }
        .sidebar-footer {
            padding: 16px 20px; border-top: 1px solid var(--border-color);
            font-size: 0.75rem; color: var(--text-muted); text-align: center;
        }

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

        /* ===== Article Page ===== */
        .article-page { flex: 1; padding: 40px 0 60px; }
        .article-hero {
            background: linear-gradient(135deg, rgba(108,92,231,0.15), rgba(253,121,168,0.08));
            padding: 40px 0 30px; border-bottom: 1px solid var(--border-color);
            margin-bottom: 40px; position: relative; overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08; pointer-events: none;
        }
        .article-hero-inner { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex; align-items: center; gap: 8px; font-size: 0.85rem;
            color: var(--text-muted); margin-bottom: 16px; flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary-light); }
        .article-breadcrumb span { color: var(--text-secondary); }
        .article-breadcrumb .sep { color: var(--text-muted); font-size: 0.7rem; }
        .article-hero h1 {
            font-size: 2.2rem; font-weight: 800; line-height: 1.25; color: #fff;
            max-width: 880px; letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex; align-items: center; gap: 20px; margin-top: 18px;
            flex-wrap: wrap; font-size: 0.9rem; color: var(--text-secondary);
        }
        .article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
        .article-meta .meta-item i { color: var(--text-muted); font-size: 0.85rem; }
        .article-meta .category-tag {
            display: inline-block; padding: 4px 16px; border-radius: 20px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.3px;
        }
        .article-body {
            max-width: 860px; margin: 0 auto; padding: 0 24px;
        }
        .article-content {
            background: var(--bg-card); border-radius: var(--radius-md);
            padding: 40px 44px; border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .article-content p {
            font-size: 1.05rem; line-height: 1.9; color: var(--text-secondary);
            margin-bottom: 1.4rem;
        }
        .article-content h2 {
            font-size: 1.5rem; margin-top: 2rem; margin-bottom: 1rem; color: #fff;
        }
        .article-content h3 {
            font-size: 1.2rem; margin-top: 1.6rem; margin-bottom: 0.8rem; color: #fff;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.4rem; padding-left: 1.6rem; color: var(--text-secondary);
        }
        .article-content ul li, .article-content ol li {
            margin-bottom: 0.5rem; list-style: disc; line-height: 1.8;
        }
        .article-content ol li { list-style: decimal; }
        .article-content a { color: var(--primary-light); text-decoration: underline; }
        .article-content a:hover { color: #fff; }
        .article-content img {
            border-radius: var(--radius-sm); margin: 1.6rem 0;
            box-shadow: var(--shadow-sm); width: 100%;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary); background: var(--bg-surface);
            padding: 16px 24px; margin: 1.6rem 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary); font-style: italic;
        }
        .article-content .highlight-box {
            background: linear-gradient(135deg, rgba(108,92,231,0.12), rgba(253,121,168,0.08));
            border: 1px solid rgba(108,92,231,0.2); border-radius: var(--radius-sm);
            padding: 20px 24px; margin: 1.6rem 0;
        }
        .article-footer-nav {
            display: flex; justify-content: space-between; align-items: center;
            margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border-color);
            flex-wrap: wrap; gap: 16px;
        }
        .article-footer-nav a {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 10px 24px; border-radius: var(--radius-sm);
            background: var(--bg-surface); border: 1px solid var(--border-color);
            color: var(--text-secondary); font-size: 0.95rem; transition: var(--transition);
        }
        .article-footer-nav a:hover { background: var(--bg-card); color: #fff; border-color: var(--border-light); }
        .article-footer-nav .back-home { background: var(--primary); border-color: var(--primary); color: #fff; }
        .article-footer-nav .back-home:hover { background: var(--primary-dark); }

        .not-found-box {
            text-align: center; padding: 80px 24px; background: var(--bg-card);
            border-radius: var(--radius-md); border: 1px solid var(--border-color);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
        .not-found-box .btn-primary {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; border-radius: var(--radius-sm);
            background: var(--primary); color: #fff; font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Related Posts ===== */
        .related-section { margin-top: 48px; }
        .related-section h2 {
            font-size: 1.4rem; margin-bottom: 24px; display: flex; align-items: center; gap: 10px;
        }
        .related-section h2 i { color: var(--primary-light); }
        .related-grid {
            display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card); border-radius: var(--radius-sm);
            border: 1px solid var(--border-color); overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-light); }
        .related-card img { width: 100%; height: 160px; object-fit: cover; }
        .related-card-body { padding: 16px 18px 20px; }
        .related-card-body h3 { font-size: 1rem; margin-bottom: 6px; }
        .related-card-body h3 a { color: #fff; }
        .related-card-body h3 a:hover { color: var(--primary-light); }
        .related-card-body .meta { font-size: 0.8rem; color: var(--text-muted); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-sidebar); border-top: 1px solid var(--border-color);
            padding: 48px 0 24px; margin-top: auto;
        }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-text {
            font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 12px;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand .brand-text span { -webkit-text-fill-color: var(--text-secondary); }
        .footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 340px; line-height: 1.7; }
        .footer-col h4 { font-size: 0.95rem; color: #fff; margin-bottom: 16px; font-weight: 600; }
        .footer-col a {
            display: block; color: var(--text-muted); font-size: 0.88rem;
            padding: 4px 0; transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-col a i { width: 20px; color: var(--text-muted); margin-right: 4px; }
        .footer-bottom {
            border-top: 1px solid var(--border-color); padding-top: 20px;
            display: flex; justify-content: space-between; align-items: center;
            flex-wrap: wrap; gap: 12px; font-size: 0.8rem; color: var(--text-muted);
        }

        /* ===== Mobile Toggle ===== */
        .sidebar-toggle {
            display: none; position: fixed; top: 16px; left: 16px; z-index: 1100;
            width: 44px; height: 44px; border-radius: var(--radius-sm);
            background: var(--bg-card); border: 1px solid var(--border-color);
            color: #fff; font-size: 1.3rem; align-items: center; justify-content: center;
            box-shadow: var(--shadow-sm); transition: var(--transition);
        }
        .sidebar-toggle:hover { background: var(--bg-card-hover); }
        .sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 999; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .article-hero h1 { font-size: 1.9rem; }
        }
        @media (max-width: 768px) {
            .sidebar { transform: translateX(-100%); width: 280px; }
            .sidebar.open { transform: translateX(0); }
            .sidebar-overlay.open { display: block; }
            .sidebar-toggle { display: flex; }
            .main-content { margin-left: 0; width: 100%; }
            .article-hero { padding: 30px 0 24px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-content { padding: 24px 20px; }
            .article-body { padding: 0 16px; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.3rem; }
            .article-content { padding: 16px 14px; }
            .article-content p { font-size: 0.95rem; }
            .article-footer-nav { flex-direction: column; align-items: stretch; }
            .article-footer-nav a { justify-content: center; }
            .article-hero { padding: 20px 0 16px; }
            .article-page { padding: 20px 0 40px; }
        }

        /* ===== Scrollbar ===== */
        .sidebar::-webkit-scrollbar { width: 4px; }
        .sidebar::-webkit-scrollbar-track { background: var(--bg-sidebar); }
        .sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
        .sidebar::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

        /* ===== Animations ===== */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .article-hero-inner { animation: fadeInUp 0.6s ease-out; }
        .article-content { animation: fadeInUp 0.6s ease-out 0.1s both; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1c0b8;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-dark: #e76f51;
            --bg-body: #f8f9fa;
            --bg-dark: #0d1b2a;
            --bg-card: #ffffff;
            --bg-sidebar: #0d1b2a;
            --bg-sidebar-hover: #1b2d45;
            --text-primary: #1a1a2e;
            --text-secondary: #495057;
            --text-light: #6c757d;
            --text-white: #f1f1f1;
            --text-muted: #adb5bd;
            --border-color: #e9ecef;
            --border-light: rgba(255, 255, 255, 0.1);
            --radius-sm: 6px;
            --radius-md: 12px;
            --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, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --max-width: 1200px;
            --section-gap: 80px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--secondary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

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

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== 左侧导航 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-sidebar);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            transition: var(--transition);
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
        }

        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .sidebar-brand .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f4a261, #e63946);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .sidebar-brand .brand-logo span {
            font-weight: 300;
            background: linear-gradient(135deg, #e9ecef, #adb5bd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .sidebar-brand .brand-sub {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-top: 2px;
        }

        .sidebar-nav {
            padding: 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-section-title {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--text-muted);
            padding: 12px 12px 8px;
            opacity: 0.7;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--text-white);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: #fff;
        }
        .sidebar-nav a:hover i {
            color: var(--accent);
        }

        .sidebar-nav a.active {
            background: rgba(230, 57, 70, 0.2);
            color: #fff;
            font-weight: 600;
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }
        .sidebar-nav a.active i {
            color: var(--primary);
        }

        .sidebar-footer {
            padding: 20px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
        }

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

        /* ===== 移动端菜单切换 ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--bg-dark);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--secondary);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 50%, #0d1b2a 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
            min-height: 240px;
            display: flex;
            align-items: center;
        }

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

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(13, 27, 42, 0.9) 0%, rgba(13, 27, 42, 0.6) 100%);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .page-banner h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .page-banner .breadcrumb a {
            color: var(--accent);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb span {
            color: var(--text-muted);
        }

        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.6;
        }

        /* ===== 分类内容区 ===== */
        .section {
            padding: var(--section-gap) 0;
        }

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

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-header .badge-group {
            margin-bottom: 16px;
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .badge-secondary {
            background: rgba(69, 123, 157, 0.15);
            color: var(--secondary-light);
        }

        .badge-accent {
            background: rgba(244, 162, 97, 0.2);
            color: #b86b2c;
        }

        /* ===== 指南卡片网格 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .guide-card .card-image {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: var(--bg-dark);
        }

        .guide-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .guide-card:hover .card-image img {
            transform: scale(1.05);
        }

        .guide-card .card-image .card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }

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

        .guide-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .guide-card .card-body .meta i {
            margin-right: 4px;
            font-size: 12px;
        }

        .guide-card .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
            line-height: 1.35;
        }

        .guide-card .card-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }

        .guide-card .card-body .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        .guide-card .card-body .btn-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ===== 图文列表 ===== */
        .list-section {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }

        .list-item {
            display: flex;
            align-items: flex-start;
            gap: 24px;
            padding: 28px 30px;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .list-item:last-child {
            border-bottom: none;
        }

        .list-item:hover {
            background: rgba(230, 57, 70, 0.02);
        }

        .list-item .item-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            min-width: 48px;
            font-feature-settings: "tnum";
        }

        .list-item .item-content {
            flex: 1;
        }

        .list-item .item-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .list-item .item-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .list-item .item-meta {
            font-size: 13px;
            color: var(--text-light);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step-counter;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px 30px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }

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

        .step-card .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 18px;
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.2);
        }

        .step-card .step-number {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            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-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
            gap: 16px;
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(230, 57, 70, 0.45);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0 30px;
            margin-top: auto;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer .footer-brand .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .brand-text span {
            font-weight: 300;
            color: var(--text-muted);
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 6px 0;
            transition: var(--transition);
        }

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

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-gap: 48px;
            }

            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .sidebar-overlay.active {
                display: block;
            }

            .main-content {
                margin-left: 0;
            }

            .page-banner {
                padding: 40px 0 36px;
                min-height: 180px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 15px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .list-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px 18px;
            }

            .list-item .item-number {
                font-size: 26px;
                min-width: auto;
            }

            .list-item .item-meta {
                white-space: normal;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 26px;
            }

            .btn-group {
                flex-direction: column;
                align-items: center;
            }

            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .page-banner h1 {
                font-size: 22px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .container {
                padding: 0 16px;
            }

            .guide-card .card-body {
                padding: 18px 16px;
            }

            .guide-card .card-image {
                height: 160px;
            }
        }

        /* ===== 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: 10px;
        }
        .sidebar::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }