/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a3a;
            --primary-light: #2a3f55;
            --primary-dark: #0f1a26;
            --accent: #e8a838;
            --accent-light: #f0c040;
            --accent-dark: #c98a2a;
            --bg: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #1a2a3a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-sidebar: 2px 0 30px rgba(0,0,0,0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --sidebar-width: 260px;
            --header-height: 68px;
            --max-width: 1280px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            display: flex;
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; 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: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

        /* ===== Layout ===== */
        .layout { display: flex; width: 100%; min-height: 100vh; }
        .sidebar {
            width: var(--sidebar-width);
            background: var(--bg-card);
            border-right: 1px solid var(--border);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 0;
            box-shadow: var(--shadow-sidebar);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .sidebar-brand {
            padding: 28px 24px 16px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            font-weight: 800;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--text-light);
        }
        .sidebar-nav {
            flex: 1;
            padding: 20px 16px;
            overflow-y: auto;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-light);
            padding: 8px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-light);
            transition: var(--transition);
        }
        .sidebar-nav a:hover {
            background: rgba(232, 168, 56, 0.08);
            color: var(--accent-dark);
        }
        .sidebar-nav a:hover i { color: var(--accent); }
        .sidebar-nav a.active {
            background: linear-gradient(135deg, rgba(232, 168, 56, 0.12), rgba(232, 168, 56, 0.04));
            color: var(--accent-dark);
            font-weight: 700;
        }
        .sidebar-nav a.active i { color: var(--accent); }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border);
            font-size: 0.75rem;
            color: var(--text-light);
            text-align: center;
        }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            padding: 0;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            z-index: 1100;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .mobile-header .m-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            color: var(--primary);
            font-size: 1.1rem;
        }
        .mobile-header .m-brand .m-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            font-weight: 800;
        }
        .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger:hover { background: rgba(0,0,0,0.04); }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-narrow { max-width: 920px; margin: 0 auto; padding: 0 32px; }

        /* ===== Section ===== */
        .section { padding: 80px 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .section-title p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto;
        }
        .section-title .badge {
            display: inline-block;
            padding: 4px 18px;
            background: rgba(232, 168, 56, 0.12);
            color: var(--accent-dark);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 12px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(232, 168, 56, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 168, 56, 0.4);
        }
        .btn-outline {
            background: transparent;
            color: var(--text);
            border: 2px solid var(--border);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            background: rgba(232, 168, 56, 0.04);
        }
        .btn-white {
            background: rgba(255,255,255,0.95);
            color: var(--primary);
        }
        .btn-white:hover {
            background: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.12);
        }
        .btn-sm { padding: 10px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 18px 44px; font-size: 1.1rem; }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .card-img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .card-body p { color: var(--text-light); font-size: 0.92rem; line-height: 1.6; }
        .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(232, 168, 56, 0.1);
            color: var(--accent-dark);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        /* ===== 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: 1fr 1fr 1fr 1fr; gap: 24px; }
        .grid-5 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr 1fr; gap: 20px; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 100px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 580px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26,42,58,0.6) 0%, transparent 70%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            font-weight: 900;
        }
        .hero-content h1 span { color: var(--accent); }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.75);
            margin-bottom: 36px;
            max-width: 560px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-search {
            display: flex;
            max-width: 460px;
            background: rgba(255,255,255,0.12);
            border-radius: 50px;
            padding: 4px;
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.1);
            margin-bottom: 24px;
        }
        .hero-search input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            color: #fff;
            font-size: 0.95rem;
            border: none;
            outline: none;
        }
        .hero-search input::placeholder { color: rgba(255,255,255,0.5); }
        .hero-search button {
            padding: 12px 28px;
            background: var(--accent);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .hero-search button:hover { background: var(--accent-light); }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            color: rgba(255,255,255,0.7);
        }
        .hero-stats .stat-item { text-align: center; }
        .hero-stats .stat-num {
            display: block;
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
        }
        .hero-stats .stat-label { font-size: 0.85rem; }

        /* ===== Features ===== */
        .features-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(232, 168, 56, 0.15);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent);
            background: rgba(232, 168, 56, 0.1);
        }
        .feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .feature-card p { font-size: 0.88rem; color: var(--text-light); }

        /* ===== Game Categories ===== */
        .cat-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
        .cat-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            background: var(--bg-card);
        }
        .cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .cat-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
        .cat-card .cat-body {
            padding: 20px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .cat-card .cat-body h3 { font-size: 1.1rem; margin-bottom: 2px; }
        .cat-card .cat-body span { font-size: 0.85rem; color: var(--text-light); }
        .cat-card .cat-arrow {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(232, 168, 56, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            transition: var(--transition);
        }
        .cat-card:hover .cat-arrow { background: var(--accent); color: #fff; }

        /* ===== Latest News / CMS List ===== */
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            align-items: center;
        }
        .news-item:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); }
        .news-item .news-img {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border);
        }
        .news-item .news-info { flex: 1; }
        .news-item .news-info h3 { font-size: 1.05rem; margin-bottom: 4px; }
        .news-item .news-info p { font-size: 0.88rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-item .news-meta {
            display: flex;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 6px;
        }
        .news-item .news-meta .tag {
            padding: 0 10px;
            background: rgba(232, 168, 56, 0.08);
            border-radius: 50px;
            color: var(--accent-dark);
        }

        /* ===== Stats ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 80px 0;
            color: #fff;
        }
        .stats-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 32px; text-align: center; }
        .stat-block .stat-number { font-size: 3rem; font-weight: 900; color: var(--accent); line-height: 1.1; }
        .stat-block .stat-label { font-size: 1rem; opacity: 0.75; margin-top: 8px; }

        /* ===== Guides ===== */
        .guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .guide-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            align-items: flex-start;
        }
        .guide-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .guide-card .guide-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .guide-card .guide-info h3 { font-size: 1.05rem; margin-bottom: 4px; }
        .guide-card .guide-info p { font-size: 0.88rem; color: var(--text-light); }
        .guide-card .guide-info .guide-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(232, 168, 56, 0.08);
            border-radius: 50px;
            font-size: 0.72rem;
            color: var(--accent-dark);
            margin-top: 6px;
        }

        /* ===== Steps / Process ===== */
        .steps-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .step-card .step-num {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
        }
        .step-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
        .step-card p { font-size: 0.85rem; color: var(--text-light); }
        .step-card .step-connector {
            position: absolute;
            right: -16px;
            top: 40%;
            font-size: 1.5rem;
            color: var(--accent);
            opacity: 0.3;
        }
        .step-card:last-child .step-connector { display: none; }

        /* ===== 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: var(--transition);
        }
        .faq-item:hover { border-color: rgba(232, 168, 56, 0.2); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { background: rgba(232, 168, 56, 0.03); }
        .faq-question i { color: var(--accent); transition: var(--transition); font-size: 1.1rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 260px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 80px 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-content { position: relative; z-index: 2; }
        .cta-content h2 { font-size: 2.4rem; color: #fff; margin-bottom: 12px; }
        .cta-content p { font-size: 1.1rem; opacity: 0.75; margin-bottom: 32px; max-width: 520px; margin-left: auto; margin-right: auto; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 48px 0 32px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; }
        .footer-brand .f-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .footer-brand .f-logo .f-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
        }
        .footer-brand p { font-size: 0.88rem; color: var(--text-light); max-width: 320px; line-height: 1.7; }
        .footer h4 { font-size: 1rem; margin-bottom: 16px; color: var(--primary); }
        .footer a { display: block; padding: 4px 0; font-size: 0.88rem; color: var(--text-light); }
        .footer a:hover { color: var(--accent-dark); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid var(--border);
            margin-top: 36px;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-light);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a { display: inline; padding: 0; color: var(--text-light); }
        .footer-bottom a:hover { padding: 0; color: var(--accent-dark); }

        /* ===== Sidebar Overlay (mobile) ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 950;
            opacity: 0;
            transition: opacity 0.35s ease;
            pointer-events: none;
        }
        .sidebar-overlay.show { opacity: 1; pointer-events: auto; }

        /* ===== Empty state ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
        }
        .empty-state i { font-size: 3rem; margin-bottom: 16px; opacity: 0.3; }
        .empty-state p { font-size: 1rem; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .features-grid { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .cat-grid { grid-template-columns: 1fr 1fr; }
            .guide-grid { grid-template-columns: 1fr; }
            .hero-content h1 { font-size: 2.6rem; }
            .section-title h2 { font-size: 1.8rem; }
        }

        @media (max-width: 768px) {
            body { display: block; }
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .main-content { margin-left: 0; padding-top: var(--header-height); }
            .mobile-header { display: flex; }
            .sidebar-overlay { display: block; }
            .hero { padding: 60px 0 80px; min-height: auto; }
            .hero-content h1 { font-size: 2rem; }
            .hero-content p { font-size: 1rem; }
            .hero-stats { gap: 20px; flex-wrap: wrap; }
            .hero-stats .stat-num { font-size: 1.5rem; }
            .container { padding: 0 20px; }
            .section { padding: 48px 0; }
            .section-title { margin-bottom: 32px; }
            .section-title h2 { font-size: 1.6rem; }
            .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .cat-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-block .stat-number { font-size: 2.2rem; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .step-card .step-connector { display: none; }
            .news-item { flex-direction: column; align-items: flex-start; }
            .news-item .news-img { width: 100%; height: 160px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .hero-search { flex-direction: column; background: transparent; border: none; padding: 0; gap: 12px; }
            .hero-search input { background: rgba(255,255,255,0.1); border-radius: 50px; padding: 14px 20px; }
            .hero-search button { width: 100%; }
            .guide-card { flex-direction: column; }
            .guide-card .guide-num { width: 36px; height: 36px; font-size: 0.9rem; }
            .cta-content h2 { font-size: 1.8rem; }
            .faq-question { font-size: 0.92rem; padding: 14px 18px; }
            .faq-answer { font-size: 0.85rem; }
        }

        @media (max-width: 520px) {
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .hero-content h1 { font-size: 1.6rem; }
            .hero-stats { flex-direction: column; gap: 12px; align-items: flex-start; }
            .hero-stats .stat-item { display: flex; gap: 8px; align-items: center; }
            .hero-stats .stat-num { font-size: 1.3rem; }
            .hero-stats .stat-label { font-size: 0.8rem; }
            .btn-lg { padding: 14px 28px; font-size: 0.95rem; }
            .container { padding: 0 14px; }
            .section { padding: 36px 0; }
            .section-title h2 { font-size: 1.4rem; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Scrollbar ===== */
        .sidebar-nav::-webkit-scrollbar { width: 4px; }
        .sidebar-nav::-webkit-scrollbar-track { background: transparent; }
        .sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1a3a6b;
        --primary-light: #2a5a9e;
        --primary-dark: #0f2444;
        --accent: #f0a830;
        --accent-light: #f4c060;
        --accent-dark: #d48a1a;
        --bg-body: #f5f7fb;
        --bg-card: #ffffff;
        --bg-sidebar: #0f2444;
        --bg-sidebar-hover: #1a3a6b;
        --text-dark: #1a1a2e;
        --text-main: #2d3748;
        --text-light: #6b7a8f;
        --text-white: #f0f4ff;
        --text-muted: #a0b0c0;
        --border-light: #e2e8f0;
        --border-card: #eef2f7;
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
        --shadow-md: 0 6px 24px rgba(0,0,0,0.07);
        --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
        --transition: 0.25s ease;
        --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
        --sidebar-width: 240px;
        --header-h: 0px;
        --container-pad: 24px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-main);
        background: var(--bg-body);
        display: flex;
        min-height: 100vh;
    }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary); }
    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 { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-dark); font-weight: 700; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.05rem; }
    p { margin-bottom: 0.8rem; }
    strong { font-weight: 600; }
    .container { max-width: 1280px; margin: 0 auto; padding: 0 var(--container-pad); width: 100%; }

    /* ===== 左侧竖向导航 ===== */
    .sidebar {
        width: var(--sidebar-width);
        min-height: 100vh;
        background: var(--bg-sidebar);
        color: var(--text-white);
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 100;
        box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        transition: transform 0.3s ease;
    }
    .sidebar-brand {
        padding: 28px 20px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .sidebar-brand .logo-icon {
        width: 42px;
        height: 42px;
        background: var(--accent);
        border-radius: var(--radius-md);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        font-weight: 800;
        color: var(--bg-sidebar);
        flex-shrink: 0;
    }
    .sidebar-brand .logo-text {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--text-white);
        line-height: 1.3;
        letter-spacing: 0.3px;
    }
    .sidebar-brand .logo-sub {
        font-size: 0.75rem;
        color: var(--text-muted);
        font-weight: 400;
        letter-spacing: 0.5px;
    }
    .sidebar-nav {
        flex: 1;
        padding: 16px 12px;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    .sidebar-nav .nav-label {
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 1.2px;
        color: var(--text-muted);
        padding: 12px 12px 6px;
        font-weight: 600;
        opacity: 0.6;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 14px;
        border-radius: var(--radius-sm);
        color: var(--text-white);
        font-size: 0.92rem;
        font-weight: 500;
        transition: background var(--transition), color var(--transition);
        text-decoration: none;
    }
    .sidebar-nav a i { width: 20px; text-align: center; font-size: 0.95rem; opacity: 0.7; }
    .sidebar-nav a:hover { background: var(--bg-sidebar-hover); color: var(--accent-light); }
    .sidebar-nav a.active { background: var(--primary-light); color: #fff; font-weight: 600; }
    .sidebar-nav a.active i { opacity: 1; }
    .sidebar-footer {
        padding: 16px 20px;
        border-top: 1px solid rgba(255,255,255,0.06);
        font-size: 0.7rem;
        color: var(--text-muted);
        text-align: center;
        line-height: 1.5;
    }

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

    /* ===== 移动端菜单切换 ===== */
    .mobile-toggle {
        display: none;
        position: fixed;
        top: 14px;
        left: 14px;
        z-index: 110;
        background: var(--primary);
        color: #fff;
        border: none;
        border-radius: var(--radius-sm);
        width: 42px;
        height: 42px;
        font-size: 1.2rem;
        cursor: pointer;
        box-shadow: var(--shadow-md);
        transition: background var(--transition);
    }
    .mobile-toggle:hover { background: var(--primary-light); }
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.4);
        z-index: 99;
    }

    /* ===== 文章 Banner ===== */
    .article-banner {
        background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
        padding: 48px 0 40px;
        position: relative;
        overflow: hidden;
    }
    .article-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        opacity: 0.12;
        pointer-events: none;
    }
    .article-banner .container {
        position: relative;
        z-index: 1;
    }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.65);
        margin-bottom: 16px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a { color: rgba(255,255,255,0.8); text-decoration: none; }
    .article-breadcrumb a:hover { color: var(--accent-light); }
    .article-breadcrumb .sep { color: rgba(255,255,255,0.4); }
    .article-banner h1 {
        color: #fff;
        font-size: 2rem;
        max-width: 800px;
        margin-bottom: 12px;
        line-height: 1.3;
        text-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }
    .article-meta-bar {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 16px;
        color: rgba(255,255,255,0.75);
        font-size: 0.88rem;
    }
    .article-meta-bar .meta-tag {
        background: var(--accent);
        color: var(--primary-dark);
        padding: 2px 14px;
        border-radius: 20px;
        font-weight: 600;
        font-size: 0.78rem;
    }
    .article-meta-bar i { margin-right: 4px; opacity: 0.7; }

    /* ===== 文章正文 ===== */
    .article-body-wrap {
        padding: 40px 0 60px;
        flex: 1;
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 36px;
        align-items: start;
    }
    .article-content {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 36px 40px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-card);
    }
    .article-content h2 {
        font-size: 1.4rem;
        margin-top: 28px;
        margin-bottom: 14px;
        padding-bottom: 8px;
        border-bottom: 2px solid var(--accent);
        display: inline-block;
    }
    .article-content h3 {
        font-size: 1.15rem;
        margin-top: 22px;
        margin-bottom: 10px;
    }
    .article-content p { margin-bottom: 1rem; line-height: 1.8; }
    .article-content ul, .article-content ol {
        margin: 12px 0 16px 24px;
        list-style: disc;
    }
    .article-content li { margin-bottom: 6px; line-height: 1.7; }
    .article-content blockquote {
        border-left: 4px solid var(--accent);
        background: #f9f6ef;
        padding: 14px 20px;
        margin: 16px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-content img {
        border-radius: var(--radius-sm);
        margin: 16px 0;
        box-shadow: var(--shadow-sm);
    }
    .article-content a { color: var(--primary-light); text-decoration: underline; }
    .article-content a:hover { color: var(--accent-dark); }

    /* ===== 侧边栏 ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 24px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-card);
    }
    .sidebar-card h4 {
        font-size: 1rem;
        margin-bottom: 14px;
        padding-bottom: 8px;
        border-bottom: 2px solid var(--accent);
        display: inline-block;
    }
    .sidebar-card ul li {
        padding: 8px 0;
        border-bottom: 1px solid var(--border-light);
    }
    .sidebar-card ul li:last-child { border-bottom: none; }
    .sidebar-card ul li a {
        color: var(--text-main);
        font-size: 0.9rem;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .sidebar-card ul li a:hover { color: var(--primary-light); }
    .sidebar-card ul li a i { color: var(--accent); font-size: 0.75rem; }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        color: #fff;
        border-radius: var(--radius-md);
        padding: 28px 24px;
        text-align: center;
    }
    .sidebar-cta h4 { color: #fff; border-bottom-color: var(--accent); }
    .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin: 12px 0 16px; }
    .sidebar-cta .btn-cta {
        display: inline-block;
        background: var(--accent);
        color: var(--primary-dark);
        padding: 10px 28px;
        border-radius: 30px;
        font-weight: 700;
        font-size: 0.92rem;
        transition: background var(--transition), transform var(--transition);
    }
    .sidebar-cta .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); }

    /* ===== 未找到文章 ===== */
    .not-found-box {
        text-align: center;
        padding: 60px 20px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-card);
    }
    .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
    .not-found-box h2 { font-size: 1.4rem; margin-bottom: 10px; }
    .not-found-box p { color: var(--text-light); margin-bottom: 20px; }
    .not-found-box .btn-back {
        display: inline-block;
        background: var(--primary);
        color: #fff;
        padding: 10px 32px;
        border-radius: 30px;
        font-weight: 600;
        transition: background var(--transition);
    }
    .not-found-box .btn-back:hover { background: var(--primary-light); }

    /* ===== 底部 ===== */
    .footer {
        background: var(--primary-dark);
        color: rgba(255,255,255,0.85);
        padding: 48px 0 24px;
        margin-top: auto;
    }
    .footer .container { max-width: 1280px; }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 36px;
        margin-bottom: 32px;
    }
    .footer-brand .f-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 12px;
    }
    .footer-brand .f-icon {
        width: 36px;
        height: 36px;
        background: var(--accent);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 800;
        color: var(--primary-dark);
        font-size: 1rem;
    }
    .footer-brand .f-logo span { font-size: 1rem; font-weight: 700; color: #fff; }
    .footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.65); line-height: 1.6; max-width: 320px; }
    .footer h4 { font-size: 0.9rem; color: #fff; margin-bottom: 14px; font-weight: 600; }
    .footer a { display: block; color: rgba(255,255,255,0.6); font-size: 0.85rem; padding: 4px 0; transition: color var(--transition); }
    .footer a:hover { color: var(--accent-light); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 10px;
        font-size: 0.78rem;
        color: rgba(255,255,255,0.45);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
        .sidebar { transform: translateX(-100%); }
        .sidebar.open { transform: translateX(0); }
        .mobile-toggle { display: flex; align-items: center; justify-content: center; }
        .sidebar-overlay.active { display: block; }
        .main-content { margin-left: 0; }
        .article-banner h1 { font-size: 1.5rem; }
        .article-content { padding: 24px 20px; }
        .article-sidebar { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
        .article-banner { padding: 32px 0 28px; }
        .article-banner h1 { font-size: 1.25rem; }
        .article-meta-bar { font-size: 0.8rem; gap: 10px; }
        .article-content { padding: 18px 14px; }
        .sidebar-card { padding: 18px; }
        .container { padding: 0 14px; }
    }

    /* ===== 辅助类 ===== */
    .text-accent { color: var(--accent); }
    .mt-2 { margin-top: 8px; }
    .mb-2 { margin-bottom: 8px; }
    .gap-2 { gap: 8px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .rounded-full { border-radius: 9999px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-bg: #eff6ff;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --accent-light: #fbbf24;
    --bg-body: #f8fafc;
    --bg-white: #ffffff;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-sidebar-hover: #1e293b;
    --bg-sidebar-active: #2563eb;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-light: #f1f5f9;
    --text-sidebar: #cbd5e1;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.25s ease;
    --sidebar-width: 240px;
    --header-height: 0px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    --container-max: 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-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-body);
    min-height: 100vh;
    display: flex;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
::selection { background: var(--primary); color: #fff; }

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

/* ===== 侧边栏 ===== */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: transform 0.3s ease;
}
.sidebar-brand {
    padding: 24px 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    gap: 12px;
}
.sidebar-brand .s-logo {
    width: 40px; height: 40px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 700; color: #fff;
    flex-shrink: 0;
}
.sidebar-brand .s-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-light);
    line-height: 1.3;
}
.sidebar-brand .s-sub {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
    margin-top: 2px;
}
.sidebar-nav {
    padding: 16px 12px;
    flex: 1;
}
.nav-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 8px 12px 6px;
    opacity: 0.6;
}
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-sidebar);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
}
.sidebar-nav a i {
    width: 20px;
    text-align: center;
    font-size: 15px;
    flex-shrink: 0;
}
.sidebar-nav a:hover {
    background: var(--bg-sidebar-hover);
    color: #fff;
}
.sidebar-nav a.active {
    background: var(--bg-sidebar-active);
    color: #fff;
    font-weight: 600;
}
.sidebar-footer {
    padding: 16px 20px 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.6;
}

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

/* ===== 移动端顶部栏 ===== */
.mobile-header {
    display: none;
    position: sticky;
    top: 0;
    z-index: 999;
    background: var(--bg-sidebar);
    padding: 12px 20px;
    align-items: center;
    justify-content: space-between;
}
.mobile-header .m-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 600;
    font-size: 15px;
}
.mobile-header .m-brand .m-logo {
    width: 32px; height: 32px;
    background: var(--primary);
    border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 700; color: #fff;
}
.mobile-toggle {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    font-size: 22px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.mobile-toggle:hover { background: var(--bg-sidebar-hover); }

/* ===== 容器 ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 28px;
    width: 100%;
}

/* ===== Hero / Banner ===== */
.page-banner {
    position: relative;
    padding: 80px 0 70px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    opacity: 0.15;
    mix-blend-mode: overlay;
}
.page-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(37,99,235,0.15) 0%, transparent 70%);
}
.page-banner .container {
    position: relative;
    z-index: 2;
}
.page-banner h1 {
    font-size: 38px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 16px;
}
.page-banner h1 span { color: var(--accent); }
.page-banner p {
    font-size: 17px;
    color: var(--text-sidebar);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 24px;
}
.banner-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.banner-tags .tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 20px;
    color: var(--text-sidebar);
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
}
.banner-tags .tag:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ===== 页面主体 ===== */
.page-main {
    flex: 1;
    padding: 56px 0 64px;
}

/* ===== Section 通用 ===== */
.section {
    margin-bottom: 56px;
}
.section:last-child { margin-bottom: 0; }
.section-header {
    text-align: center;
    margin-bottom: 36px;
}
.section-header h2 {
    font-size: 30px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.25;
}
.section-header p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}
.section-header .section-icon {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 12px;
    display: block;
}

/* ===== 分类卡片网格 ===== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.cat-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}
.cat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--primary-light);
}
.cat-card .cat-img {
    height: 180px;
    background: var(--border-light);
    position: relative;
    overflow: hidden;
}
.cat-card .cat-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.cat-card:hover .cat-img img { transform: scale(1.05); }
.cat-card .cat-img .cat-badge {
    position: absolute;
    top: 14px; left: 14px;
    padding: 4px 14px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    letter-spacing: 0.3px;
}
.cat-card .cat-body {
    padding: 20px 22px 22px;
}
.cat-card .cat-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}
.cat-card .cat-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
}
.cat-card .cat-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
}
.cat-card .cat-meta i { margin-right: 4px; }
.cat-card .cat-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.cat-card .cat-link:hover { gap: 10px; color: var(--primary-dark); }

/* ===== 攻略列表 ===== */
.guide-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.guide-item {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 18px 22px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.guide-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}
.guide-item .guide-num {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}
.guide-item .guide-content { flex: 1; }
.guide-item .guide-content h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.3;
}
.guide-item .guide-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}
.guide-item .guide-tag {
    padding: 3px 14px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 2px;
}
.guide-item .guide-tag.hot { background: #fef2f2; color: #dc2626; }
.guide-item .guide-tag.new { background: #f0fdf4; color: #16a34a; }

/* ===== 攻略指南区块 ===== */
.guide-feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.guide-feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 30px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    gap: 18px;
    align-items: flex-start;
}
.guide-feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.guide-feature-card .gf-icon {
    width: 52px; height: 52px;
    border-radius: var(--radius-sm);
    background: var(--primary-bg);
    color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}
.guide-feature-card .gf-body h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.guide-feature-card .gf-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 数据统计 ===== */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.stat-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.stat-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stat-item .stat-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
    margin-bottom: 4px;
}
.stat-item .stat-num .stat-plus { font-size: 24px; }
.stat-item .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    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-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    background: none;
    width: 100%;
    text-align: left;
    transition: var(--transition);
    gap: 16px;
}
.faq-question:hover { color: var(--primary); }
.faq-question .faq-icon {
    font-size: 14px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}
.faq-item.active .faq-icon { transform: rotate(180deg); color: var(--primary); }
.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}
.faq-answer p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    padding: 52px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    opacity: 0.08;
    mix-blend-mode: overlay;
}
.cta-section .container {
    position: relative;
    z-index: 2;
}
.cta-section h2 {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}
.cta-section p {
    font-size: 17px;
    color: rgba(255,255,255,0.85);
    max-width: 560px;
    margin: 0 auto 28px;
    line-height: 1.7;
}
.cta-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
}
.cta-btn.primary {
    background: #fff;
    color: var(--primary);
}
.cta-btn.primary:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.cta-btn.outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}
.cta-btn.outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
    transform: translateY(-2px);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    padding: 48px 0 0;
    margin-top: auto;
}
.footer .container { padding: 0 28px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .f-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}
.footer-brand .f-logo .f-icon {
    width: 36px; height: 36px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 700; color: #fff;
}
.footer-brand .f-logo span {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-light);
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 360px;
}
.footer h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}
.footer a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 10px;
    transition: var(--transition);
}
.footer a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
}
.footer-bottom span { opacity: 0.8; }

/* ===== 移动端遮罩 ===== */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}

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

@media (max-width: 768px) {
    body { flex-direction: column; }
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.open { display: block; }
    .mobile-header { display: flex; }
    .main-content { margin-left: 0; }
    .page-banner { padding: 56px 0 48px; }
    .page-banner h1 { font-size: 28px; }
    .page-banner p { font-size: 15px; }
    .page-main { padding: 40px 0 48px; }
    .section { margin-bottom: 40px; }
    .section-header h2 { font-size: 24px; }
    .category-grid { grid-template-columns: 1fr; gap: 16px; }
    .stats-row { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .stat-item { padding: 20px 16px; }
    .stat-item .stat-num { font-size: 28px; }
    .guide-item { padding: 14px 16px; flex-wrap: wrap; }
    .guide-item .guide-tag { margin-left: auto; }
    .guide-feature-grid { gap: 16px; }
    .guide-feature-card { padding: 20px; flex-direction: column; }
    .cta-section { padding: 36px 24px; border-radius: var(--radius-md); }
    .cta-section h2 { font-size: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .container { padding: 0 20px; }
    .faq-question { padding: 14px 18px; font-size: 15px; }
    .faq-answer { padding: 0 18px; }
    .faq-item.active .faq-answer { padding: 0 18px 16px; }
}

@media (max-width: 520px) {
    .page-banner h1 { font-size: 22px; }
    .page-banner p { font-size: 14px; }
    .stats-row { grid-template-columns: 1fr 1fr; gap: 10px; }
    .stat-item .stat-num { font-size: 24px; }
    .cta-btns { flex-direction: column; align-items: center; }
    .cta-btn { width: 100%; justify-content: center; }
    .banner-tags .tag { font-size: 12px; padding: 4px 12px; }
    .guide-item { flex-direction: column; gap: 10px; }
    .guide-item .guide-tag { align-self: flex-start; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }