/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary-dark: #0f0c29;
            --primary-mid: #302b63;
            --primary-light: #24243e;
            --accent: #f5a623;
            --accent-hover: #e0951a;
            --accent-glow: rgba(245, 166, 35, 0.25);
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-sidebar: linear-gradient(145deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
            --text-primary: #2d3436;
            --text-secondary: #636e72;
            --text-light: #b2bec3;
            --border-color: #e8ecf1;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 260px;
            --header-height: 0px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
            display: flex;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { font: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font: inherit; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 10px 16px; outline: none; transition: var(--transition); }
        input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--text-primary); }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== Layout ===== */
        .layout { display: flex; width: 100%; min-height: 100vh; }

        /* ===== Sidebar ===== */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            color: #fff;
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1000;
            padding: 32px 20px 20px;
            transition: transform var(--transition);
            box-shadow: 4px 0 30px rgba(0,0,0,0.15);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 28px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 28px;
        }
        .sidebar-brand .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #1a1a2e;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }
        .sidebar-brand .brand-text span { color: var(--accent); }
        .sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 4px; }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
            position: relative;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
        .sidebar-nav a:hover { background: rgba(255,255,255,0.07); color: #fff; }
        .sidebar-nav a.active {
            background: var(--accent);
            color: #1a1a2e;
            font-weight: 600;
            box-shadow: 0 4px 15px var(--accent-glow);
        }
        .sidebar-nav a.active i { color: #1a1a2e; }
        .sidebar-footer {
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 12px;
            color: rgba(255,255,255,0.4);
            text-align: center;
            line-height: 1.5;
        }

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

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--bg-sidebar);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 20px rgba(0,0,0,0.10);
        }
        .mobile-header .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
        }
        .mobile-header .brand-text span { color: var(--accent); }
        .mobile-toggle {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 22px;
            background: rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .mobile-toggle:hover { background: rgba(255,255,255,0.12); }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .sidebar-overlay.open { opacity: 1; pointer-events: auto; }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            padding: 80px 0 70px;
            background: linear-gradient(135deg, #f0f2ff 0%, #fdf6ef 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245,166,35,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(48,43,99,0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { max-width: 700px; }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-glow);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }
        .hero-tag i { font-size: 12px; }
        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            color: var(--primary-dark);
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 36px;
            line-height: 1.7;
        }
        .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: 600;
            font-size: 15px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary-mid);
            color: #fff;
            box-shadow: 0 4px 20px rgba(48,43,99,0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(48,43,99,0.30);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: #fff;
            color: var(--text-primary);
            border: 1.5px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-secondary:active { transform: translateY(0); }
        .btn-accent {
            background: var(--accent);
            color: #1a1a2e;
            box-shadow: 0 4px 20px var(--accent-glow);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--accent-glow);
        }
        .btn-accent:active { transform: translateY(0); }

        /* ===== Section Common ===== */
        .section { padding: 70px 0; }
        .section-alt { background: #fff; }
        .section-header { text-align: center; margin-bottom: 48px; }
        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .section-tag {
            display: inline-block;
            background: var(--accent-glow);
            color: var(--accent);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        /* ===== Features ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-card);
            padding: 36px 28px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(245,166,35,0.20);
        }
        .feature-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 26px;
            color: #fff;
        }
        .feature-card .icon.purple { background: linear-gradient(135deg, #302b63, #24243e); }
        .feature-card .icon.gold { background: linear-gradient(135deg, #f5a623, #e0951a); }
        .feature-card .icon.teal { background: linear-gradient(135deg, #0f8a8a, #0b6e6e); }
        .feature-card h3 { font-size: 19px; margin-bottom: 12px; }
        .feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

        /* ===== Categories ===== */
        .categories-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            padding: 32px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .category-card:nth-child(1)::before { background: linear-gradient(90deg, #302b63, #5b4d9e); }
        .category-card:nth-child(2)::before { background: linear-gradient(90deg, #f5a623, #f7c35c); }
        .category-card:nth-child(3)::before { background: linear-gradient(90deg, #0f8a8a, #14b8b8); }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .cat-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            margin-bottom: 18px;
        }
        .category-card:nth-child(1) .cat-icon { background: linear-gradient(135deg, #302b63, #5b4d9e); }
        .category-card:nth-child(2) .cat-icon { background: linear-gradient(135deg, #f5a623, #f7c35c); }
        .category-card:nth-child(3) .cat-icon { background: linear-gradient(135deg, #0f8a8a, #14b8b8); }
        .category-card h3 { font-size: 20px; margin-bottom: 10px; }
        .category-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 18px; }
        .category-card .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-mid);
            transition: var(--transition);
        }
        .category-card .cat-link i { font-size: 12px; transition: var(--transition); }
        .category-card .cat-link:hover { color: var(--accent); }
        .category-card .cat-link:hover i { transform: translateX(4px); }

        /* ===== Stats ===== */
        .stats-section {
            background: var(--bg-sidebar);
            color: #fff;
        }
        .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 28px; text-align: center; }
        .stat-item .stat-num {
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 8px;
        }
        .stat-item .stat-label { font-size: 15px; color: rgba(255,255,255,0.65); font-weight: 500; }

        /* ===== Latest Posts (CMS) ===== */
        .posts-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            padding: 28px;
            transition: var(--transition);
        }
        .post-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .post-card .post-meta .badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: var(--accent-glow);
            color: var(--accent);
        }
        .post-card h3 { font-size: 17px; margin-bottom: 10px; font-weight: 600; }
        .post-card h3 a { color: var(--text-primary); }
        .post-card h3 a:hover { color: var(--primary-mid); }
        .post-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
        .post-card .post-footer {
            margin-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
        }
        .post-card .post-footer a {
            color: var(--primary-mid);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .post-card .post-footer a:hover { color: var(--accent); }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
            color: var(--text-light);
            font-size: 15px;
        }

        /* ===== Process Flow ===== */
        .process-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; position: relative; }
        .process-step {
            text-align: center;
            position: relative;
        }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-mid);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            margin: 0 auto 18px;
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 20px rgba(48,43,99,0.20);
        }
        .process-step:nth-child(2) .step-num { background: var(--accent); color: #1a1a2e; }
        .process-step:nth-child(3) .step-num { background: #0f8a8a; }
        .process-step:nth-child(4) .step-num { background: #302b63; }
        .process-step h4 { font-size: 17px; margin-bottom: 8px; }
        .process-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; max-width: 200px; margin: 0 auto; }
        .process-step::after {
            content: '';
            position: absolute;
            top: 28px;
            left: 60%;
            width: calc(80% - 28px);
            height: 2px;
            background: var(--border-color);
            z-index: 0;
        }
        .process-step:last-child::after { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 760px; 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: var(--transition);
        }
        .faq-item:hover { border-color: rgba(245,166,35,0.25); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: transparent;
            transition: var(--transition);
        }
        .faq-question i { font-size: 14px; color: var(--text-light); transition: var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
            color: #fff;
            text-align: center;
            padding: 72px 0;
        }
        .cta-section h2 { font-size: 34px; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-section p { font-size: 16px; color: rgba(255,255,255,0.7); max-width: 520px; margin: 0 auto 32px; line-height: 1.7; }
        .cta-section .btn-accent { font-size: 16px; padding: 16px 40px; }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a0a1a;
            color: rgba(255,255,255,0.6);
            padding: 48px 0 32px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .brand-text { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .footer-brand .brand-text span { color: var(--accent); }
        .footer-brand p { font-size: 14px; line-height: 1.7; max-width: 300px; }
        .footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.5); transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(255,255,255,0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2,1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 900px) {
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .main-content { margin-left: 0; }
            .mobile-header { display: flex; }
            .sidebar-overlay { display: block; }
            .hero h1 { font-size: 36px; }
            .process-grid { grid-template-columns: repeat(2,1fr); }
            .process-step::after { display: none; }
        }
        @media (max-width: 768px) {
            .hero { padding: 56px 0 48px; }
            .hero h1 { font-size: 30px; }
            .hero p { font-size: 16px; }
            .features-grid { grid-template-columns: 1fr; }
            .categories-grid { grid-template-columns: 1fr; }
            .posts-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2,1fr); gap: 20px; }
            .stat-item .stat-num { font-size: 34px; }
            .section { padding: 48px 0; }
            .section-header h2 { font-size: 26px; }
            .process-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .cta-section h2 { font-size: 26px; }
            .cta-section .btn-accent { width: 100%; justify-content: center; }
            .hero-actions .btn { flex: 1; justify-content: center; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 26px; }
            .hero p { font-size: 15px; }
            .section-header h2 { font-size: 22px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-item .stat-num { font-size: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .sidebar { width: 100%; max-width: 300px; }
        }

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

/* roulang page: category1 */
/* ===== Design Tokens ===== */
        :root {
            --primary: #4f46e5;
            --primary-light: #6366f1;
            --primary-dark: #3730a3;
            --primary-bg: #eef2ff;
            --secondary: #0ea5e9;
            --secondary-light: #38bdf8;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-sidebar: #0f172a;
            --bg-sidebar-hover: #1e293b;
            --bg-sidebar-active: #4f46e5;
            --text: #1e293b;
            --text-light: #64748b;
            --text-inverse: #f1f5f9;
            --text-sidebar: #94a3b8;
            --border: #e2e8f0;
            --border-focus: #4f46e5;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 12px 36px rgba(79, 70, 229, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --sidebar-width: 240px;
            --header-h: 0px;
            --max-width: 1240px;
        }

        /* ===== 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);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            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;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            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, 0.06);
            text-align: center;
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
        }
        .brand-text span {
            color: var(--primary-light);
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-sidebar);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 17px;
        }
        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: var(--bg-sidebar-active);
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
        }

        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 12px;
            color: var(--text-sidebar);
            text-align: center;
        }

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

        /* ===== Mobile Header (hidden on desktop) ===== */
        .mobile-header {
            display: none;
            background: var(--bg-sidebar);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .mobile-header .brand-text {
            font-size: 20px;
        }
        .mobile-toggle {
            color: #fff;
            font-size: 24px;
            padding: 4px 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--bg-sidebar-hover);
        }

        /* Mobile overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.45);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #c7d2fe 100%);
            padding: 60px 24px 50px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 span {
            color: var(--primary);
        }
        .page-hero p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.8;
        }
        .page-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .page-hero .breadcrumb a {
            color: var(--primary);
        }
        .page-hero .breadcrumb i {
            font-size: 12px;
        }

        /* ===== Section共用 ===== */
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-light);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            gap: 24px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-bg);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #fff;
            margin-bottom: 18px;
        }
        .card-icon.purple {
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
        }
        .card-icon.blue {
            background: linear-gradient(135deg, #0ea5e9, #38bdf8);
        }
        .card-icon.green {
            background: linear-gradient(135deg, #10b981, #34d399);
        }
        .card-icon.amber {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
        }
        .card-icon.rose {
            background: linear-gradient(135deg, #f43f5e, #fb7185);
        }
        .card-icon.cyan {
            background: linear-gradient(135deg, #06b6d4, #22d3ee);
        }

        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .card .badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-top: 12px;
        }

        /* ===== Steps ===== */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
            max-width: 720px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--bg-card);
            padding: 24px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .step-item:hover {
            border-color: var(--primary-bg);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
        }
        .step-content h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .step-content p {
            color: var(--text-light);
            font-size: 15px;
        }

        /* ===== Tag / Label ===== */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 16px 0 8px;
        }
        .tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary-dark);
            border: 1px solid transparent;
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 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-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-bg);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--primary-bg);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius);
            padding: 52px 40px;
            text-align: center;
            color: #fff;
            box-shadow: 0 12px 40px rgba(79, 70, 229, 0.25);
        }
        .cta-block h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 17px;
            opacity: 0.9;
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-bg);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Stat / Data ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-light);
            margin-top: 4px;
        }

        /* ===== Tip Box ===== */
        .tip-box {
            background: var(--primary-bg);
            border-left: 5px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            margin-top: 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .tip-box i {
            font-size: 22px;
            color: var(--primary);
            margin-top: 2px;
        }
        .tip-box p {
            font-size: 15px;
            color: var(--text);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-sidebar);
            color: var(--text-sidebar);
            padding: 48px 24px 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-text {
            font-size: 22px;
            text-align: left;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-sidebar);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-sidebar);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            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: 20px;
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-sidebar);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }
            .sidebar-overlay.show {
                pointer-events: auto;
            }

            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
            }

            .page-hero {
                padding: 40px 16px 36px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero p {
                font-size: 16px;
            }

            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
            }

            .card-grid-3,
            .card-grid-2,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }

            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .cta-block {
                padding: 36px 20px;
            }
            .cta-block h2 {
                font-size: 24px;
            }

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

            .steps-list {
                gap: 16px;
            }
            .step-item {
                padding: 18px 20px;
                flex-direction: column;
                align-items: stretch;
            }
            .step-num {
                width: 36px;
                height: 36px;
                min-width: 36px;
                font-size: 15px;
            }

            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px 14px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 24px;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .btn-group {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                justify-content: center;
            }
            .card {
                padding: 20px 16px;
            }
            .tip-box {
                flex-direction: column;
                gap: 8px;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-bg: #f4f0ff;
            --secondary: #00cec9;
            --secondary-dark: #00b5b0;
            --accent: #fd79a8;
            --bg: #f8f9fe;
            --bg-alt: #ffffff;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #555577;
            --text-muted: #8888aa;
            --border: #e8e6f0;
            --border-light: #f0eff5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.06);
            --shadow-md: 0 6px 24px rgba(108, 92, 231, 0.10);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.14);
            --shadow-hover: 0 12px 36px rgba(108, 92, 231, 0.18);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --sidebar-width: 240px;
            --header-height: 64px;
            --max-width: 1200px;
        }

        /* ===== 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;
            flex-direction: column;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.6rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Sidebar Layout ===== */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }
        .sidebar {
            width: var(--sidebar-width);
            background: var(--bg-alt);
            border-right: 1px solid var(--border);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 20px 0 16px;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 2px 0 20px rgba(108, 92, 231, 0.04);
        }
        .sidebar-brand {
            padding: 0 20px 24px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
        }
        .brand-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
        }
        .brand-text span {
            color: var(--primary);
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 0 12px;
            flex: 1;
            overflow-y: auto;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            font-size: 0.95rem;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .sidebar-nav a:hover i {
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.25);
        }
        .sidebar-nav a.active i {
            color: #fff;
        }
        .sidebar-footer-mini {
            padding: 16px 20px 0;
            border-top: 1px solid var(--border-light);
            margin-top: 8px;
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .page-header {
            background: linear-gradient(135deg, var(--primary) 0%, #8b7cf7 100%);
            padding: 60px 0 52px;
            position: relative;
            overflow: hidden;
        }
        .page-header::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-header .container {
            position: relative;
            z-index: 2;
        }
        .page-header h1 {
            color: #fff;
            font-size: 2.8rem;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .page-header p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 640px;
            margin-bottom: 0;
        }
        .breadcrumb {
            display: flex;
            gap: 8px;
            align-items: center;
            margin-bottom: 20px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Sections ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .section-title .badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.8rem;
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 16px;
            transition: background var(--transition), color var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .card h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .card p {
            font-size: 0.95rem;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== Feature Block ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-block .feature-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--primary-bg);
            aspect-ratio: 4/3;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 4rem;
            color: var(--primary);
        }
        .feature-block .feature-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .feature-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .feature-item .fi-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary);
            flex-shrink: 0;
        }
        .feature-item h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 0.92rem;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* ===== Steps ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }
        .step-card::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            top: 12px;
            right: 16px;
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--border);
            line-height: 1;
            transition: color var(--transition);
        }
        .step-card:hover::before {
            color: var(--primary-light);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-card .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin: 0 auto 16px;
            transition: background var(--transition), color var(--transition);
        }
        .step-card:hover .step-icon {
            background: var(--primary);
            color: #fff;
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .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-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== 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-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--text);
            background: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--primary-bg);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-light);
            display: none;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, #8b7cf7 100%);
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -20%;
            width: 500px;
            height: 500px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-primary:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn i {
            font-size: 1rem;
        }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.8rem;
            padding: 4px 14px;
            border-radius: 20px;
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
        }
        .badge-pill {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.7rem;
            padding: 2px 12px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        /* ===== Divider ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px auto 24px;
        }
        .divider-left {
            margin: 16px 0 24px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .site-footer .container {
            max-width: var(--max-width);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-text {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom span:last-child {
            color: var(--primary-light);
        }

        /* ===== Mobile Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 200;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text);
            cursor: pointer;
            transition: all var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 99;
            backdrop-filter: blur(4px);
            transition: opacity var(--transition);
        }
        .overlay.show {
            display: block;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .steps {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feature-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-block .feature-image {
                aspect-ratio: 16/9;
                order: -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }
            .mobile-toggle {
                display: flex;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 4px 0 32px rgba(0, 0, 0, 0.12);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .page-header {
                padding: 48px 0 40px;
            }
            .page-header h1 {
                font-size: 2rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-block {
                padding: 36px 24px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .feature-block .feature-image {
                font-size: 3rem;
            }
            .stat-number {
                font-size: 2rem;
            }
        }

        @media (max-width: 520px) {
            .page-header h1 {
                font-size: 1.6rem;
            }
            .page-header p {
                font-size: 0.95rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .container {
                padding: 0 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .card {
                padding: 20px 16px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
            }
            .brand-text {
                font-size: 1.2rem;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease-out forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

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

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #6c5ce7;
        --primary-light: #a29bfe;
        --primary-dark: #4834d4;
        --secondary: #00cec9;
        --secondary-light: #81ecec;
        --accent: #fd79a8;
        --bg-dark: #0a0a1a;
        --bg-card: #12122a;
        --bg-card-hover: #1a1a3a;
        --bg-surface: #0f0f25;
        --bg-gradient: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 50%, #0a1a2e 100%);
        --text-primary: #f0f0ff;
        --text-secondary: #b8b8d0;
        --text-muted: #7a7a9a;
        --border-color: #2a2a4a;
        --border-light: #3a3a5a;
        --radius-sm: 8px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --radius-xl: 32px;
        --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
        --shadow-md: 0 8px 32px rgba(108, 92, 231, 0.12);
        --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.18);
        --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.15);
        --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        --sidebar-width: 240px;
        --header-height: 0px;
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== 基础 Reset ===== */
    *,
    *::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-gradient);
        color: var(--text-primary);
        line-height: 1.7;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }
    a {
        color: var(--primary-light);
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--secondary);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-sm);
    }
    button,
    input,
    textarea {
        font-family: inherit;
        font-size: inherit;
    }
    ul,
    ol {
        list-style: none;
    }

    /* ===== 容器 ===== */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 整体布局 ===== */
    .app-wrapper {
        display: flex;
        min-height: 100vh;
    }

    /* ===== 侧边导航 ===== */
    .sidebar {
        width: var(--sidebar-width);
        background: rgba(10, 10, 30, 0.95);
        border-right: 1px solid var(--border-color);
        backdrop-filter: blur(20px);
        padding: 32px 20px;
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 1000;
        transition: transform var(--transition);
        overflow-y: auto;
    }
    .sidebar-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        padding-bottom: 28px;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: 24px;
    }
    .sidebar-brand .brand-icon {
        width: 40px;
        height: 40px;
        background: var(--primary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        color: #fff;
        flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
    }
    .sidebar-brand .brand-text {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-primary);
        letter-spacing: 0.5px;
    }
    .sidebar-brand .brand-text span {
        color: var(--secondary);
    }
    .sidebar-nav {
        display: flex;
        flex-direction: column;
        gap: 4px;
        flex: 1;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        font-size: 15px;
        font-weight: 500;
        transition: all var(--transition);
        position: relative;
    }
    .sidebar-nav a i {
        width: 20px;
        text-align: center;
        font-size: 16px;
        color: var(--text-muted);
        transition: color var(--transition);
    }
    .sidebar-nav a:hover {
        color: var(--text-primary);
        background: rgba(108, 92, 231, 0.08);
    }
    .sidebar-nav a:hover i {
        color: var(--primary-light);
    }
    .sidebar-nav a.active {
        color: var(--text-primary);
        background: rgba(108, 92, 231, 0.15);
        box-shadow: inset 3px 0 0 var(--primary);
    }
    .sidebar-nav a.active i {
        color: var(--primary-light);
    }
    .sidebar-footer {
        padding-top: 20px;
        border-top: 1px solid var(--border-color);
        margin-top: auto;
    }
    .sidebar-footer .user-info {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 12px;
        border-radius: var(--radius-sm);
        background: rgba(108, 92, 231, 0.06);
        cursor: pointer;
        transition: background var(--transition);
    }
    .sidebar-footer .user-info:hover {
        background: rgba(108, 92, 231, 0.12);
    }
    .sidebar-footer .user-avatar {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        color: #fff;
        flex-shrink: 0;
    }
    .sidebar-footer .user-name {
        font-size: 14px;
        font-weight: 600;
        color: var(--text-primary);
    }
    .sidebar-footer .user-status {
        font-size: 12px;
        color: var(--text-muted);
    }

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

    /* ===== 移动端顶部栏 ===== */
    .mobile-header {
        display: none;
        background: rgba(10, 10, 30, 0.98);
        border-bottom: 1px solid var(--border-color);
        padding: 12px 20px;
        align-items: center;
        justify-content: space-between;
        position: sticky;
        top: 0;
        z-index: 999;
        backdrop-filter: blur(20px);
    }
    .mobile-header .brand-text {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-primary);
    }
    .mobile-header .brand-text span {
        color: var(--secondary);
    }
    .mobile-menu-btn {
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 24px;
        cursor: pointer;
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        transition: background var(--transition);
    }
    .mobile-menu-btn:hover {
        background: rgba(108, 92, 231, 0.1);
    }
    .mobile-menu-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 999;
        backdrop-filter: blur(4px);
    }
    .mobile-menu-overlay.open {
        display: block;
    }

    /* ===== 文章页专用样式 ===== */
    .article-wrapper {
        padding: 40px 0 60px;
    }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 28px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a {
        color: var(--text-muted);
        transition: color var(--transition);
    }
    .article-breadcrumb a:hover {
        color: var(--primary-light);
    }
    .article-breadcrumb .separator {
        color: var(--border-light);
        font-size: 12px;
    }
    .article-breadcrumb .current {
        color: var(--text-secondary);
    }

    .article-header {
        margin-bottom: 32px;
    }
    .article-header .article-category {
        display: inline-block;
        background: rgba(108, 92, 231, 0.15);
        color: var(--primary-light);
        padding: 6px 18px;
        border-radius: 20px;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 16px;
        border: 1px solid rgba(108, 92, 231, 0.2);
    }
    .article-header h1 {
        font-size: 32px;
        font-weight: 800;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }
    .article-header .article-meta {
        display: flex;
        align-items: center;
        gap: 20px;
        font-size: 14px;
        color: var(--text-muted);
        flex-wrap: wrap;
    }
    .article-header .article-meta span {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-header .article-meta i {
        font-size: 14px;
        color: var(--primary-light);
    }

    .article-featured-image {
        margin-bottom: 32px;
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-md);
        background: var(--bg-card);
        aspect-ratio: 16/9;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .article-featured-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .article-featured-image .no-image {
        color: var(--text-muted);
        font-size: 48px;
        opacity: 0.3;
    }

    .article-body {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 40px 48px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
    }
    .article-body .content {
        font-size: 16px;
        line-height: 1.9;
        color: var(--text-secondary);
    }
    .article-body .content p {
        margin-bottom: 20px;
    }
    .article-body .content h2,
    .article-body .content h3 {
        color: var(--text-primary);
        margin-top: 36px;
        margin-bottom: 16px;
        font-weight: 700;
    }
    .article-body .content h2 {
        font-size: 24px;
    }
    .article-body .content h3 {
        font-size: 20px;
    }
    .article-body .content ul,
    .article-body .content ol {
        margin-bottom: 20px;
        padding-left: 24px;
    }
    .article-body .content ul li {
        list-style: disc;
        margin-bottom: 8px;
    }
    .article-body .content ol li {
        list-style: decimal;
        margin-bottom: 8px;
    }
    .article-body .content blockquote {
        border-left: 4px solid var(--primary);
        padding: 16px 24px;
        margin: 24px 0;
        background: rgba(108, 92, 231, 0.06);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-body .content a {
        color: var(--secondary);
        text-decoration: underline;
        text-underline-offset: 2px;
    }
    .article-body .content a:hover {
        color: var(--secondary-light);
    }
    .article-body .content img {
        border-radius: var(--radius-sm);
        margin: 24px 0;
        box-shadow: var(--shadow-sm);
    }
    .article-body .content code {
        background: rgba(108, 92, 231, 0.1);
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 14px;
        color: var(--primary-light);
    }
    .article-body .content pre {
        background: rgba(0, 0, 0, 0.3);
        padding: 20px 24px;
        border-radius: var(--radius-sm);
        overflow-x: auto;
        margin: 24px 0;
        border: 1px solid var(--border-color);
    }
    .article-body .content pre code {
        background: none;
        padding: 0;
        color: var(--text-secondary);
    }
    .article-body .content table {
        width: 100%;
        border-collapse: collapse;
        margin: 24px 0;
        font-size: 14px;
    }
    .article-body .content table th,
    .article-body .content table td {
        padding: 12px 16px;
        border: 1px solid var(--border-color);
        text-align: left;
    }
    .article-body .content table th {
        background: rgba(108, 92, 231, 0.1);
        color: var(--text-primary);
        font-weight: 600;
    }
    .article-body .content table td {
        color: var(--text-secondary);
    }

    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
    }
    .article-tags .tag {
        display: inline-block;
        background: rgba(108, 92, 231, 0.08);
        color: var(--text-secondary);
        padding: 6px 16px;
        border-radius: 20px;
        font-size: 13px;
        border: 1px solid var(--border-color);
        transition: all var(--transition);
    }
    .article-tags .tag:hover {
        background: rgba(108, 92, 231, 0.15);
        color: var(--primary-light);
        border-color: var(--primary);
    }

    .article-nav {
        display: flex;
        justify-content: space-between;
        gap: 20px;
        margin-top: 40px;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
    }
    .article-nav a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 14px 20px;
        background: var(--bg-surface);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        font-size: 14px;
        font-weight: 500;
        transition: all var(--transition);
        flex: 1;
        max-width: 48%;
    }
    .article-nav a:hover {
        background: rgba(108, 92, 231, 0.08);
        border-color: var(--primary);
        color: var(--text-primary);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }
    .article-nav a .nav-direction {
        font-size: 12px;
        color: var(--text-muted);
        font-weight: 400;
    }
    .article-nav a .nav-title {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .article-nav a.next {
        text-align: right;
        flex-direction: row-reverse;
    }

    /* ===== 相关推荐 ===== */
    .related-section {
        margin-top: 48px;
    }
    .related-section .section-title {
        font-size: 22px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 24px;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .related-section .section-title i {
        color: var(--primary-light);
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    .related-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 24px;
        border: 1px solid var(--border-color);
        transition: all var(--transition);
    }
    .related-card:hover {
        transform: translateY(-4px);
        border-color: var(--primary);
        box-shadow: var(--shadow-md);
    }
    .related-card .rel-category {
        font-size: 12px;
        font-weight: 600;
        color: var(--primary-light);
        margin-bottom: 8px;
        display: block;
    }
    .related-card h4 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .related-card p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .related-card .rel-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-top: 12px;
        font-size: 12px;
        color: var(--text-muted);
    }

    /* ===== FAQ 板块 ===== */
    .faq-section {
        margin-top: 48px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 40px 48px;
        border: 1px solid var(--border-color);
    }
    .faq-section .section-title {
        font-size: 22px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 24px;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .faq-section .section-title i {
        color: var(--secondary);
    }
    .faq-item {
        border-bottom: 1px solid var(--border-color);
        padding: 18px 0;
    }
    .faq-item:last-child {
        border-bottom: none;
    }
    .faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        gap: 16px;
        user-select: none;
    }
    .faq-question i {
        color: var(--primary-light);
        font-size: 14px;
        transition: transform var(--transition);
        flex-shrink: 0;
    }
    .faq-question.open i {
        transform: rotate(180deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.7;
    }
    .faq-answer.open {
        max-height: 300px;
        padding-top: 14px;
    }

    /* ===== 错误状态 ===== */
    .error-state {
        text-align: center;
        padding: 80px 20px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
    }
    .error-state i {
        font-size: 64px;
        color: var(--text-muted);
        opacity: 0.3;
        margin-bottom: 20px;
    }
    .error-state h2 {
        font-size: 24px;
        color: var(--text-primary);
        margin-bottom: 12px;
    }
    .error-state p {
        color: var(--text-secondary);
        margin-bottom: 24px;
    }
    .error-state .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        background: var(--primary);
        color: #fff;
        border-radius: var(--radius-sm);
        font-weight: 600;
        transition: all var(--transition);
    }
    .error-state .btn-back:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: rgba(10, 10, 30, 0.95);
        border-top: 1px solid var(--border-color);
        padding: 48px 0 32px;
        margin-top: auto;
    }
    .site-footer .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 32px;
    }
    .site-footer .footer-brand .brand-text {
        font-size: 22px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 12px;
    }
    .site-footer .footer-brand .brand-text span {
        color: var(--secondary);
    }
    .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: var(--text-primary);
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }
    .site-footer .footer-col ul li {
        margin-bottom: 10px;
    }
    .site-footer .footer-col ul li a {
        font-size: 14px;
        color: var(--text-muted);
        transition: color var(--transition);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .site-footer .footer-col ul li a:hover {
        color: var(--primary-light);
    }
    .site-footer .footer-col ul li a i {
        font-size: 13px;
        color: var(--primary-light);
        width: 16px;
    }
    .site-footer .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-top: 24px;
        border-top: 1px solid var(--border-color);
        font-size: 13px;
        color: var(--text-muted);
    }
    .site-footer .footer-bottom span:last-child {
        color: var(--primary-light);
        font-weight: 500;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .related-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .site-footer .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .article-body {
            padding: 32px 28px;
        }
        .faq-section {
            padding: 32px 28px;
        }
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-100%);
        }
        .sidebar.open {
            transform: translateX(0);
        }
        .main-content {
            margin-left: 0;
        }
        .mobile-header {
            display: flex;
        }
        .article-header h1 {
            font-size: 24px;
        }
        .article-body {
            padding: 24px 20px;
        }
        .article-body .content {
            font-size: 15px;
        }
        .article-body .content h2 {
            font-size: 20px;
        }
        .article-body .content h3 {
            font-size: 18px;
        }
        .article-nav {
            flex-direction: column;
        }
        .article-nav a {
            max-width: 100%;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .faq-section {
            padding: 24px 20px;
        }
        .faq-question {
            font-size: 15px;
        }
        .site-footer .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .site-footer .footer-bottom {
            flex-direction: column;
            gap: 8px;
            text-align: center;
        }
        .article-wrapper {
            padding: 24px 0 40px;
        }
        .article-breadcrumb {
            font-size: 13px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .article-header h1 {
            font-size: 20px;
        }
        .article-body {
            padding: 20px 16px;
            border-radius: var(--radius-sm);
        }
        .article-body .content {
            font-size: 14px;
        }
        .article-header .article-meta {
            font-size: 13px;
            gap: 12px;
        }
        .article-tags .tag {
            font-size: 12px;
            padding: 4px 12px;
        }
        .faq-section {
            padding: 20px 16px;
        }
        .faq-question {
            font-size: 14px;
        }
        .related-card {
            padding: 18px;
        }
        .related-card h4 {
            font-size: 15px;
        }
    }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2340;
            --accent: #0ea5e9;
            --accent-light: #38bdf8;
            --accent-dark: #0284c7;
            --safe-green: #10b981;
            --safe-green-light: #34d399;
            --warn-amber: #f59e0b;
            --danger: #ef4444;
            --bg-body: #f1f5f9;
            --bg-card: #ffffff;
            --bg-sidebar: #0f172a;
            --bg-sidebar-hover: #1e293b;
            --bg-dark-well: #1e293b;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #f8fafc;
            --text-sidebar: #cbd5e1;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.10);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            --sidebar-width: 240px;
            --header-h: 0px;
            --max-width: 1200px;
            --gap-section: 80px;
            --gap-block: 48px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-dark); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { 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: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.02em; }
        h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.01em; }
        h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--gap-block);
        }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 640px; margin: 0 auto; font-size: 1.05rem; }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(14,165,233,0.12);
            color: var(--accent);
            letter-spacing: 0.3px;
        }
        .badge-safe { background: rgba(16,185,129,0.12); color: var(--safe-green); }
        .badge-warn { background: rgba(245,158,11,0.12); color: var(--warn-amber); }
        .badge-danger { background: rgba(239,68,68,0.12); color: var(--danger); }

        /* ===== Sidebar Navigation ===== */
        .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;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0,0,0,0.2);
        }
        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .sidebar-brand .brand-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.01em;
        }
        .sidebar-brand .brand-text span { color: var(--accent-light); }
        .sidebar-brand .brand-sub {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 4px;
            opacity: 0.7;
        }
        .sidebar-nav {
            flex: 1;
            padding: 20px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-sidebar);
            font-size: 0.95rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; color: var(--text-light); transition: color var(--transition); }
        .sidebar-nav a:hover { background: var(--bg-sidebar-hover); color: var(--text-white); transform: translateX(4px); }
        .sidebar-nav a:hover i { color: var(--accent-light); }
        .sidebar-nav a.active {
            background: rgba(14,165,233,0.15);
            color: var(--accent-light);
            box-shadow: inset 3px 0 0 var(--accent);
        }
        .sidebar-nav a.active i { color: var(--accent-light); }
        .sidebar-footer {
            padding: 16px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.75rem;
            color: var(--text-light);
            text-align: center;
            opacity: 0.6;
        }

        /* ===== Mobile Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px; left: 16px;
            z-index: 1100;
            background: var(--bg-sidebar);
            color: var(--text-white);
            width: 44px; height: 44px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: var(--shadow-md);
            border: 1px solid rgba(255,255,255,0.08);
            cursor: pointer;
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: var(--bg-sidebar-hover); }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            width: 100%;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .page-section {
            padding: 60px 0;
        }
        .page-section:first-of-type { padding-top: 0; }
        .page-section + .page-section { border-top: 1px solid var(--border-color); }

        /* ===== Hero ===== */
        .hero-security {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f2340 100%);
            overflow: hidden;
            color: var(--text-white);
        }
        .hero-security::before {
            content: '';
            position: absolute;
            top: -40%; right: -20%;
            width: 600px; height: 600px;
            background: radial-gradient(circle, rgba(14,165,233,0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-security::after {
            content: '';
            position: absolute;
            bottom: -30%; left: -10%;
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(16,185,129,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-security .container { position: relative; z-index: 1; }
        .hero-security .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 40px;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(6px);
            font-size: 0.85rem;
            color: var(--accent-light);
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.06);
        }
        .hero-security h1 {
            color: var(--text-white);
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            max-width: 720px;
            margin-bottom: 16px;
        }
        .hero-security h1 span { color: var(--accent-light); }
        .hero-security .hero-desc {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(14,165,233,0.35);
        }
        .btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14,165,233,0.4); }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.25);
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.08); color: var(--text-white); border-color: rgba(255,255,255,0.4); transform: translateY(-2px); }
        .btn-sm { padding: 10px 22px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn .fa-arrow-right { transition: transform var(--transition); }
        .btn:hover .fa-arrow-right { transform: translateX(4px); }

        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--accent); }
        .feature-card .icon-box {
            width: 56px; height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 18px;
            background: rgba(14,165,233,0.1);
            color: var(--accent);
        }
        .feature-card .icon-box.green { background: rgba(16,185,129,0.1); color: var(--safe-green); }
        .feature-card .icon-box.amber { background: rgba(245,158,11,0.1); color: var(--warn-amber); }
        .feature-card .icon-box.purple { background: rgba(139,92,246,0.1); color: #8b5cf6; }
        .feature-card h3 { margin-bottom: 8px; font-size: 1.15rem; }
        .feature-card p { font-size: 0.92rem; margin-bottom: 0; color: var(--text-secondary); }
        .feature-card .tag-list { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
        .feature-card .tag {
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-body);
            color: var(--text-secondary);
        }

        /* ===== Security Strategy ===== */
        .strategy-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .strategy-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .strategy-item:hover { box-shadow: var(--shadow-md); border-color: var(--accent); }
        .strategy-item .s-icon {
            flex-shrink: 0;
            width: 44px; height: 44px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            background: rgba(14,165,233,0.08);
            color: var(--accent);
        }
        .strategy-item .s-content h4 { font-size: 1rem; margin-bottom: 4px; }
        .strategy-item .s-content p { font-size: 0.88rem; margin-bottom: 0; color: var(--text-secondary); }

        /* ===== Tools Grid ===== */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .tool-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .tool-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
        .tool-card .t-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .tool-card h4 { font-size: 1rem; margin-bottom: 6px; }
        .tool-card p { font-size: 0.85rem; margin-bottom: 14px; color: var(--text-secondary); }
        .tool-card .btn { margin-top: auto; }

        /* ===== Stats ===== */
        .stats-wrap {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .stat-item .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-num span { color: var(--accent); }
        .stat-item .stat-label { font-size: 0.9rem; color: var(--text-secondary); margin-top: 6px; }

        /* ===== Guide Steps ===== */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            counter-reset: step;
        }
        .guide-step {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            text-align: center;
            transition: all var(--transition);
        }
        .guide-step:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .guide-step::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px; left: 50%;
            transform: translateX(-50%);
            width: 32px; height: 32px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(14,165,233,0.3);
        }
        .guide-step .g-icon { font-size: 2rem; color: var(--accent); margin-bottom: 14px; margin-top: 6px; }
        .guide-step h4 { font-size: 1rem; margin-bottom: 8px; }
        .guide-step p { font-size: 0.88rem; margin-bottom: 0; color: var(--text-secondary); }

        /* ===== 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-color);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(14,165,233,0.04); }
        .faq-question .fa-chevron-down { transition: transform var(--transition); color: var(--text-light); font-size: 0.85rem; }
        .faq-item.open .faq-question .fa-chevron-down { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p { margin-bottom: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
            padding: 72px 0;
            color: var(--text-white);
            text-align: center;
        }
        .cta-section h2 { color: var(--text-white); margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-section .btn-primary { background: var(--accent); box-shadow: 0 4px 20px rgba(14,165,233,0.4); }
        .cta-section .btn-primary:hover { background: var(--accent-light); }

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1320;
            color: var(--text-sidebar);
            padding: 56px 0 24px;
            margin-left: var(--sidebar-width);
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .brand-text { font-size: 1.2rem; font-weight: 700; color: var(--text-white); margin-bottom: 12px; }
        .footer-brand .brand-text span { color: var(--accent-light); }
        .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.88rem; transition: color var(--transition); display: inline-flex; align-items: center; gap: 6px; }
        .footer-col ul li a:hover { color: var(--accent-light); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== Floating Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px; right: 32px;
            width: 48px; height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition);
            z-index: 999;
            border: 1px solid rgba(255,255,255,0.1);
        }
        .back-top.show { opacity: 1; visibility: visible; }
        .back-top:hover { background: var(--primary-light); transform: translateY(-3px); box-shadow: var(--shadow-lg); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .strategy-list { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            :root { --sidebar-width: 0px; --gap-section: 48px; }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open { transform: translateX(0); }
            .mobile-toggle { display: flex; }
            .main-content { margin-left: 0; padding-top: 0; }
            .hero-security { padding: 60px 0 40px; }
            .hero-security h1 { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .feature-grid { grid-template-columns: 1fr 1fr; }
            .tools-grid { grid-template-columns: 1fr 1fr; }
            .stats-wrap { grid-template-columns: 1fr 1fr; }
            .guide-steps { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .site-footer { margin-left: 0; }
            .page-section { padding: 40px 0; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .feature-grid { grid-template-columns: 1fr; }
            .tools-grid { grid-template-columns: 1fr; }
            .stats-wrap { grid-template-columns: 1fr; }
            .guide-steps { grid-template-columns: 1fr; }
            .strategy-item { flex-direction: column; }
            .hero-security h1 { font-size: 1.5rem; }
            .faq-question { padding: 14px 16px; font-size: 0.9rem; }
            .cta-section { padding: 48px 0; }
            .back-top { bottom: 20px; right: 20px; width: 40px; height: 40px; font-size: 1rem; }
        }

        /* ===== Overlay for mobile ===== */
        .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 (max-width: 768px) {
            .sidebar-overlay.show { display: block; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }