/* roulang page: index */
:root {
            --primary: #00d9c0;
            --primary-glow: rgba(0, 217, 192, 0.35);
            --accent: #7c5cff;
            --accent-glow: rgba(124, 92, 255, 0.3);
            --bg-body: #0b0e14;
            --bg-sidebar: #0d1118;
            --bg-card: #111825;
            --bg-card-hover: #161f30;
            --bg-input: #0d1420;
            --text: #e8eaf0;
            --text-muted: #8a94a6;
            --text-light: #b8c0d0;
            --border: rgba(255, 255, 255, 0.07);
            --border-active: rgba(0, 217, 192, 0.4);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 24px rgba(0, 217, 192, 0.2);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --sidebar-width: 260px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font);
            background-color: var(--bg-body);
            color: var(--text);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition), opacity var(--transition);
        }

        a:hover,
        a:focus {
            color: #00f0d6;
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-top: 0;
        }

        /* ===== App Shell 侧边栏 ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition);
            overflow-y: auto;
            scrollbar-width: thin;
            scrollbar-color: rgba(0, 217, 192, 0.3) transparent;
        }

        .app-sidebar::-webkit-scrollbar {
            width: 4px;
        }

        .app-sidebar::-webkit-scrollbar-thumb {
            background: rgba(0, 217, 192, 0.3);
            border-radius: 4px;
        }

        .app-sidebar::-webkit-scrollbar-track {
            background: transparent;
        }

        .sidebar-brand {
            padding: 24px 20px 20px;
            text-align: center;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
        }

        .sidebar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #0b0e14;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 10px;
            box-shadow: var(--shadow-glow);
        }

        .sidebar-brand .brand-name {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            letter-spacing: 0.02em;
        }

        .sidebar-brand .brand-name a {
            color: var(--text);
            text-decoration: none;
        }

        .sidebar-brand .brand-name a:hover {
            color: var(--primary);
        }

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

        .sidebar-nav .nav-label {
            font-size: 0.72rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            padding: 0 12px 8px;
            font-weight: 600;
        }

        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            background: transparent;
            text-decoration: none;
            position: relative;
        }

        .sidebar-nav .nav-link i {
            font-size: 1.1rem;
            width: 22px;
            text-align: center;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .sidebar-nav .nav-link:hover {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text);
        }

        .sidebar-nav .nav-link:hover i {
            color: var(--primary);
        }

        .sidebar-nav .nav-link.active {
            background: rgba(0, 217, 192, 0.1);
            color: var(--primary);
            font-weight: 600;
            border-left: 3px solid var(--primary);
            padding-left: 13px;
        }

        .sidebar-nav .nav-link.active i {
            color: var(--primary);
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border);
            flex-shrink: 0;
            font-size: 0.78rem;
            color: var(--text-muted);
            text-align: center;
        }

        .sidebar-footer .online-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary-glow);
            margin-right: 6px;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.3);
            }
        }

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

        /* ===== 移动端顶栏 ===== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border);
            padding: 12px 16px;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .mobile-topbar .topbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
        }

        .mobile-topbar .topbar-brand .brand-icon-sm {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #0b0e14;
            font-size: 16px;
            font-weight: 800;
        }

        .mobile-topbar .btn-menu {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text);
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: all var(--transition);
        }

        .mobile-topbar .btn-menu:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-active);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1035;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ===== Hero 白皮书获客 ===== */
        .hero-section {
            position: relative;
            padding: 60px 0 56px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 20, 0.92) 30%, rgba(11, 14, 20, 0.75) 60%, rgba(11, 14, 20, 0.9) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 217, 192, 0.12);
            color: var(--primary);
            border: 1px solid var(--border-active);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 18px;
        }

        .hero-badge .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 6px var(--primary-glow);
        }

        .hero-title {
            font-size: 2.3rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary), #00f0d6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.02rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 560px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 28px;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat .stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-feature-settings: 'tnum';
        }

        .hero-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-pulse {
            position: relative;
            overflow: hidden;
        }

        .btn-pulse::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.15);
            transform: translate(-50%, -50%);
            pointer-events: none;
            transition: width 0.5s, height 0.5s;
        }

        .btn-pulse:hover::after {
            width: 300px;
            height: 300px;
        }

        /* Hero 右侧白皮书卡片 */
        .hero-ebook-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .hero-ebook-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .hero-ebook-card .ebook-preview {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            margin-bottom: 20px;
        }

        .hero-ebook-card .ebook-cover {
            width: 100px;
            height: 140px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            box-shadow: var(--shadow-md);
            border: 2px solid var(--border-active);
        }

        .hero-ebook-card .ebook-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-ebook-card .ebook-toc {
            flex: 1;
            min-width: 0;
        }

        .hero-ebook-card .ebook-toc h6 {
            font-size: 0.9rem;
            color: var(--text);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .hero-ebook-card .ebook-toc ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .hero-ebook-card .ebook-toc ul li {
            font-size: 0.82rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-ebook-card .ebook-toc ul li i {
            color: var(--primary);
            font-size: 0.7rem;
            flex-shrink: 0;
        }

        .hero-ebook-card .form-group {
            margin-bottom: 10px;
        }

        .hero-ebook-card .form-control {
            background: var(--bg-input);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            color: var(--text);
            padding: 11px 14px;
            font-size: 0.88rem;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .hero-ebook-card .form-control::placeholder {
            color: rgba(138, 148, 166, 0.6);
        }

        .hero-ebook-card .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 217, 192, 0.15);
            background: var(--bg-input);
            color: var(--text);
        }

        .hero-ebook-card .btn-download {
            background: linear-gradient(135deg, var(--primary), #00c4ae);
            color: #0b0e14;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 11px 20px;
            width: 100%;
            font-size: 0.9rem;
            transition: all var(--transition);
            letter-spacing: 0.02em;
            cursor: pointer;
        }

        .hero-ebook-card .btn-download:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
            background: linear-gradient(135deg, #00f0d6, #00d9c0);
        }

        .hero-ebook-card .form-note {
            font-size: 0.72rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }

        /* ===== 通用板块样式 ===== */
        .section-block {
            padding: 56px 0;
            position: relative;
        }

        .section-block.alt-bg {
            background: var(--bg-sidebar);
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            background: rgba(0, 217, 192, 0.08);
            border: 1px solid rgba(0, 217, 192, 0.2);
            border-radius: 50px;
            padding: 4px 12px;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 1.65rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .section-header .section-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.75;
            max-width: 680px;
        }

        /* ===== 卡片样式 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            height: 100%;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card-custom:hover {
            border-color: var(--border-active);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }

        .card-custom .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 217, 192, 0.1);
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 14px;
        }

        .card-custom h5 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .card-custom p {
            font-size: 0.86rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        .card-custom .card-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 14px;
            aspect-ratio: 16/9;
        }

        .card-custom .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .card-custom .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.72rem;
            color: var(--text-muted);
            margin-top: 10px;
        }

        .card-custom .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
            transition: gap var(--transition);
        }

        .card-custom .card-link:hover {
            gap: 10px;
            color: #00f0d6;
        }

        /* ===== 按钮样式 ===== */
        .btn-custom-primary {
            background: linear-gradient(135deg, var(--primary), #00c4ae);
            color: #0b0e14;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            font-size: 0.9rem;
            transition: all var(--transition);
            letter-spacing: 0.02em;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }

        .btn-custom-primary:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
            color: #0b0e14;
            background: linear-gradient(135deg, #00f0d6, #00d9c0);
        }

        .btn-custom-outline {
            background: transparent;
            color: var(--text);
            font-weight: 600;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 11px 22px;
            font-size: 0.9rem;
            transition: all var(--transition);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }

        .btn-custom-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 217, 192, 0.06);
        }

        .btn-custom-accent {
            background: linear-gradient(135deg, var(--accent), #6a4de0);
            color: #ffffff;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            font-size: 0.9rem;
            transition: all var(--transition);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }

        .btn-custom-accent:hover {
            box-shadow: 0 0 24px rgba(124, 92, 255, 0.35);
            transform: translateY(-1px);
            color: #ffffff;
        }

        /* ===== 标签/徽章 ===== */
        .badge-custom {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 50px;
            letter-spacing: 0.02em;
        }

        .badge-custom.badge-green {
            background: rgba(0, 217, 192, 0.1);
            color: var(--primary);
            border: 1px solid rgba(0, 217, 192, 0.25);
        }

        .badge-custom.badge-purple {
            background: rgba(124, 92, 255, 0.1);
            color: var(--accent);
            border: 1px solid rgba(124, 92, 255, 0.25);
        }

        .badge-custom.badge-orange {
            background: rgba(255, 152, 0, 0.1);
            color: #ff9800;
            border: 1px solid rgba(255, 152, 0, 0.25);
        }

        /* ===== 资讯列表 ===== */
        .info-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .info-list .info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }

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

        .info-list .info-item:hover {
            padding-left: 8px;
            border-bottom-color: var(--border-active);
        }

        .info-list .info-item .info-index {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            font-size: 0.78rem;
            font-weight: 700;
            flex-shrink: 0;
            font-feature-settings: 'tnum';
        }

        .info-list .info-item:hover .info-index {
            background: rgba(0, 217, 192, 0.1);
            color: var(--primary);
        }

        .info-list .info-item .info-body {
            flex: 1;
            min-width: 0;
        }

        .info-list .info-item .info-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-list .info-item:hover .info-title {
            color: var(--primary);
        }

        .info-list .info-item .info-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .info-list .info-item .info-meta i {
            font-size: 0.68rem;
        }

        /* 推荐栏 */
        .recommend-panel {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px;
            position: sticky;
            top: 24px;
        }

        .recommend-panel h6 {
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }

        .recommend-panel .recommend-item {
            display: flex;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }

        .recommend-panel .recommend-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .recommend-panel .recommend-item:hover {
            padding-left: 6px;
        }

        .recommend-panel .recommend-item .rec-index {
            font-size: 1.1rem;
            font-weight: 800;
            color: rgba(0, 217, 192, 0.5);
            min-width: 28px;
            font-feature-settings: 'tnum';
        }

        .recommend-panel .recommend-item .rec-content {
            flex: 1;
            min-width: 0;
        }

        .recommend-panel .recommend-item .rec-title {
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-light);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .recommend-panel .recommend-item:hover .rec-title {
            color: var(--primary);
        }

        .recommend-panel .recommend-item .rec-count {
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--border-active);
        }

        .faq-item .faq-question {
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text);
            user-select: none;
            transition: all var(--transition);
        }

        .faq-item .faq-question:hover {
            color: var(--primary);
        }

        .faq-item .faq-question .faq-toggle {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            font-size: 0.8rem;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .faq-item .faq-question.active .faq-toggle {
            background: rgba(0, 217, 192, 0.12);
            color: var(--primary);
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 20px 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }

        .faq-item .faq-answer.show {
            display: block;
        }

        /* ===== 收藏分享区块 ===== */
        .share-section {
            background: linear-gradient(135deg, var(--bg-sidebar) 0%, #131a2a 50%, var(--bg-sidebar) 100%);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
        }

        .share-section::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -30px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 217, 192, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .share-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124, 92, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .share-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .share-section p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .share-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }

        .share-steps .step-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-light);
        }

        .share-steps .step-item .step-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 217, 192, 0.12);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .progress-custom {
            height: 6px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.06);
            overflow: hidden;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .progress-custom .progress-bar-custom {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 6px;
            transition: width 1s ease;
            width: 0%;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border);
            padding: 40px 0 28px;
            margin-top: auto;
        }

        .site-footer .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-bottom: 20px;
        }

        .site-footer .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
        }

        .site-footer .footer-brand .footer-logo .brand-icon-sm {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #0b0e14;
            font-size: 16px;
            font-weight: 800;
        }

        .site-footer .footer-brand p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 380px;
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 16px;
        }

        .site-footer .footer-links a {
            font-size: 0.82rem;
            color: var(--text-muted);
            padding: 4px 10px;
            border-radius: 6px;
            transition: all var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--primary);
            background: rgba(0, 217, 192, 0.06);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 18px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom .copyright {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .site-footer .footer-bottom .copyright a {
            color: var(--text-muted);
        }

        .site-footer .footer-bottom .copyright a:hover {
            color: var(--primary);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1199.98px) {
            .hero-title {
                font-size: 2rem;
            }
            .section-block {
                padding: 44px 0;
            }
        }

        @media (max-width: 991.98px) {
            :root {
                --sidebar-width: 0px;
            }

            .app-sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: var(--shadow-lg);
            }

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

            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }

            .sidebar-overlay.show {
                pointer-events: auto;
                opacity: 1;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: 64px;
            }

            .hero-section {
                padding: 32px 0 40px;
            }

            .hero-title {
                font-size: 1.75rem;
            }

            .hero-ebook-card {
                margin-top: 20px;
            }

            .section-header h2 {
                font-size: 1.4rem;
            }

            .recommend-panel {
                position: static;
                margin-top: 20px;
            }
        }

        @media (max-width: 767.98px) {
            .hero-title {
                font-size: 1.5rem;
            }

            .hero-stats {
                gap: 16px;
            }

            .hero-stat .stat-value {
                font-size: 1.3rem;
            }

            .section-block {
                padding: 32px 0;
            }

            .share-section {
                padding: 24px 18px;
            }

            .share-steps {
                gap: 12px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .hero-ebook-card .ebook-preview {
                flex-direction: column;
            }

            .hero-ebook-card .ebook-cover {
                width: 80px;
                height: 112px;
            }
        }

        @media (max-width: 519.98px) {
            .hero-title {
                font-size: 1.32rem;
            }

            .hero-desc {
                font-size: 0.9rem;
            }

            .section-header h2 {
                font-size: 1.25rem;
            }

            .card-custom {
                padding: 18px;
            }

            .share-steps {
                flex-direction: column;
            }

            .btn-custom-primary,
            .btn-custom-outline,
            .btn-custom-accent {
                width: 100%;
                justify-content: center;
            }
        }

        /* Bootstrap 覆盖 */
        .container {
            max-width: 1140px;
        }

        @media (min-width: 1200px) {
            .container {
                max-width: 1080px;
            }
        }

        .row > * {
            padding-right: 12px;
            padding-left: 12px;
        }

        .row {
            margin-right: -12px;
            margin-left: -12px;
        }

        /* 文本选择 */
        ::selection {
            background: rgba(0, 217, 192, 0.3);
            color: #ffffff;
        }

        /* 滚动条 */
        body::-webkit-scrollbar,
        .main-content::-webkit-scrollbar {
            width: 6px;
        }

        body::-webkit-scrollbar-thumb,
        .main-content::-webkit-scrollbar-thumb {
            background: rgba(0, 217, 192, 0.3);
            border-radius: 6px;
        }

        body::-webkit-scrollbar-track,
        .main-content::-webkit-scrollbar-track {
            background: transparent;
        }

        .main-content {
            overflow-x: hidden;
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}