/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #0099cc;
            --primary-light: #66e5ff;
            --primary-glow: rgba(0, 212, 255, 0.25);
            --secondary: #8b5cf6;
            --secondary-dark: #6d3fd8;
            --secondary-light: #a78bfa;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-dark: #0b0f1a;
            --bg-card: #131827;
            --bg-card-hover: #1a2235;
            --bg-surface: #1e293b;
            --bg-input: #1a2235;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --text-inverse: #0b0f1a;
            --border: #1e293b;
            --border-light: #334155;
            --border-primary: rgba(0, 212, 255, 0.25);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.12);
            --shadow-glow-strong: 0 0 40px rgba(0, 212, 255, 0.25);
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 48px;
            --space-3xl: 64px;
            --space-4xl: 96px;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --transition-fast: 0.15s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 72px;
            --tab-height: 64px;
            --max-width: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            padding-bottom: var(--tab-height);
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-light);
        }

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-4xl) 0;
            position: relative;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
            padding: var(--space-xs) var(--space-md);
            border-radius: var(--radius-full);
            border: 1px solid var(--border-primary);
            margin-bottom: var(--space-lg);
        }

        .section-title {
            font-size: clamp(1.75rem, 4vw, 2.75rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: var(--space-md);
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }
        .section-header .section-subtitle {
            margin: 0 auto;
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(11, 15, 26, 0.85);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }

        .header.scrolled {
            background: rgba(11, 15, 26, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            transition: opacity var(--transition-fast);
        }
        .logo:hover {
            opacity: 0.9;
            color: var(--text-primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }
        .logo-text {
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: var(--space-xl);
        }
        .nav-desktop a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: var(--space-xs) 0;
            transition: color var(--transition-fast);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition-base);
        }
        .nav-desktop a:hover {
            color: var(--text-primary);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .nav-desktop a.active {
            color: var(--primary);
        }
        .nav-desktop a.active::after {
            width: 100%;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff !important;
            padding: var(--space-sm) var(--space-xl) !important;
            border-radius: var(--radius-full);
            font-weight: 600 !important;
            font-size: 0.9rem !important;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast) !important;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35) !important;
            color: #fff !important;
        }
        .nav-cta i {
            font-size: 0.85rem;
        }

        /* 移动端底部 Tab */
        .bottom-tab {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: var(--tab-height);
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-around;
            padding: 0 var(--space-md);
            z-index: 999;
            display: none;
        }
        .bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            color: var(--text-muted);
            font-size: 0.65rem;
            font-weight: 500;
            padding: var(--space-xs) var(--space-sm);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            min-width: 56px;
            text-align: center;
        }
        .bottom-tab a i {
            font-size: 1.2rem;
            transition: transform var(--transition-fast);
        }
        .bottom-tab a:hover {
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
        }
        .bottom-tab a.active {
            color: var(--primary);
        }
        .bottom-tab a.active i {
            transform: scale(1.1);
        }
        .bottom-tab a .tab-label {
            font-size: 0.6rem;
            line-height: 1;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            min-height: 85vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding: var(--space-4xl) 0 var(--space-3xl);
            margin-top: var(--nav-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(11, 15, 26, 0.92) 0%,
                    rgba(11, 15, 26, 0.70) 50%,
                    rgba(11, 15, 26, 0.88) 100%);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 70%),
                radial-gradient(ellipse at 80% 30%, rgba(139, 92, 246, 0.06) 0%, transparent 60%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: rgba(0, 212, 255, 0.10);
            border: 1px solid var(--border-primary);
            padding: var(--space-xs) var(--space-lg);
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            color: var(--primary-light);
            font-weight: 500;
            margin-bottom: var(--space-xl);
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            font-size: 0.75rem;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        .hero-title {
            font-size: clamp(2.2rem, 6vw, 4rem);
            font-weight: 900;
            line-height: 1.08;
            margin-bottom: var(--space-lg);
            max-width: 800px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-secondary);
            max-width: 580px;
            line-height: 1.8;
            margin-bottom: var(--space-2xl);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: var(--space-md) var(--space-2xl);
            border-radius: var(--radius-full);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 4px 24px rgba(0, 212, 255, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.4);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: var(--space-md) var(--space-2xl);
            border-radius: var(--radius-full);
            border: 1.5px solid var(--border-light);
            transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(0, 212, 255, 0.06);
            color: var(--primary-light);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-2xl);
            margin-top: var(--space-3xl);
            padding-top: var(--space-2xl);
            border-top: 1px solid var(--border);
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.1;
        }
        .hero-stat-number .unit {
            font-size: 1rem;
            color: var(--primary);
            font-weight: 600;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: var(--space-xs);
        }

        /* ===== 功能亮点 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--space-lg);
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-2xl) var(--space-xl);
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-primary);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: var(--space-lg);
            background: rgba(0, 212, 255, 0.08);
            color: var(--primary);
            transition: background var(--transition-fast), transform var(--transition-fast);
        }
        .feature-card:hover .feature-icon {
            background: rgba(0, 212, 255, 0.15);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: var(--space-sm);
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--space-xl);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-primary);
            box-shadow: var(--shadow-glow);
        }
        .category-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .category-card:hover .category-card-img {
            transform: scale(1.04);
        }
        .category-card-body {
            padding: var(--space-xl);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: var(--space-sm);
        }
        .category-card-body p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            flex: 1;
            margin-bottom: var(--space-lg);
        }
        .category-card-link {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            font-weight: 600;
            color: var(--primary);
            font-size: 0.9rem;
            transition: gap var(--transition-fast);
        }
        .category-card-link i {
            font-size: 0.75rem;
            transition: transform var(--transition-fast);
        }
        .category-card:hover .category-card-link i {
            transform: translateX(4px);
        }

        /* ===== 最新资讯 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--space-lg);
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: var(--space-xl);
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-primary);
            box-shadow: var(--shadow-sm);
        }
        .news-card .tag {
            display: inline-block;
            background: rgba(139, 92, 246, 0.12);
            color: var(--secondary-light);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px var(--space-sm);
            border-radius: var(--radius-sm);
            margin-bottom: var(--space-sm);
            align-self: flex-start;
            border: 1px solid rgba(139, 92, 246, 0.15);
        }
        .news-card h3 {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: var(--space-sm);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card h3 a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .news-card h3 a:hover {
            color: var(--primary);
        }
        .news-card p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: var(--space-md);
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: var(--space-md);
            margin-top: auto;
        }
        .news-card .meta .cat {
            color: var(--primary);
            font-weight: 500;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--space-3xl) var(--space-xl);
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-light);
        }
        .news-empty i {
            font-size: 2rem;
            margin-bottom: var(--space-md);
            opacity: 0.5;
        }

        /* ===== 数据/流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--space-xl);
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-2xl) var(--space-xl);
            text-align: center;
            transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
            position: relative;
            counter-increment: step;
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-primary);
            box-shadow: var(--shadow-glow);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-lg);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.2);
        }
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: var(--space-sm);
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-lg) var(--space-xl);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast), background var(--transition-fast);
            gap: var(--space-md);
        }
        .faq-question:hover {
            color: var(--primary-light);
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition-base), color var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 var(--space-xl);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--space-xl) var(--space-xl);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.04), rgba(139, 92, 246, 0.04));
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-xl);
            padding: var(--space-3xl) var(--space-2xl);
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-box h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: var(--space-md);
        }
        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 500px;
            margin: 0 auto var(--space-xl);
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: var(--space-md);
        }

        /* ===== 页脚 ===== */
        .footer {
            border-top: 1px solid var(--border);
            padding: var(--space-3xl) 0 var(--space-2xl);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand .logo {
            margin-bottom: var(--space-md);
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--space-lg);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .footer-col ul li {
            margin-bottom: var(--space-sm);
        }
        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: var(--space-xl);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--space-md);
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .footer-social {
            display: flex;
            gap: var(--space-md);
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }
        .footer-social a:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-primary);
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-xl);
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
                --tab-height: 58px;
            }
            .section {
                padding: var(--space-2xl) 0;
            }
            .nav-desktop {
                display: none;
            }
            .bottom-tab {
                display: flex;
            }
            body {
                padding-bottom: var(--tab-height);
            }
            .hero {
                min-height: 70vh;
                padding: var(--space-2xl) 0;
            }
            .hero-stats {
                gap: var(--space-xl);
                padding-top: var(--space-xl);
                margin-top: var(--space-2xl);
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-box {
                padding: var(--space-2xl) var(--space-lg);
            }
            .faq-question {
                font-size: 0.92rem;
                padding: var(--space-md) var(--space-lg);
            }
            .faq-answer {
                font-size: 0.88rem;
            }
            .hero-title {
                font-size: clamp(1.8rem, 8vw, 2.8rem);
            }
            .section-title {
                font-size: clamp(1.4rem, 5vw, 2rem);
            }
        }

        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                flex-direction: column;
                gap: var(--space-md);
            }
            .nav-cta {
                padding: var(--space-sm) var(--space-lg) !important;
                font-size: 0.82rem !important;
            }
            .bottom-tab a {
                min-width: 48px;
            }
            .bottom-tab a i {
                font-size: 1.05rem;
            }
            .container {
                padding: 0 var(--space-md);
            }
        }

        /* ===== 工具类 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .gap-sm {
            gap: var(--space-sm);
        }
        .gap-md {
            gap: var(--space-md);
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mt-xl {
            margin-top: var(--space-xl);
        }
        .mb-lg {
            margin-bottom: var(--space-lg);
        }
        .mb-xl {
            margin-bottom: var(--space-xl);
        }
        .text-center {
            text-align: center;
        }
        .text-muted {
            color: var(--text-muted);
        }
        .d-none {
            display: none;
        }
        @media (min-width: 769px) {
            .d-md-block {
                display: block !important;
            }
            .d-md-none {
                display: none !important;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #f0b800;
            --primary-light: #ffd84d;
            --primary-dark: #c99400;
            --accent: #00d4ff;
            --accent2: #7c3aed;
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-section: #0d1225;
            --bg-section-alt: #0f1729;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(240, 184, 0, 0.15);
            --border-glow: rgba(240, 184, 0, 0.3);
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 30px rgba(240, 184, 0, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --spacing-section: 5rem;
            --spacing-block: 3rem;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.75rem; }
        h2 { font-size: 2.25rem; margin-bottom: 1rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        p { color: var(--text-secondary); margin-bottom: 1rem; }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 1.5rem;
            width: 100%;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 0.75rem 0;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .logo .logo-icon {
            color: var(--primary);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(240, 184, 0, 0.4));
        }
        .logo .logo-text {
            background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-desktop a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.4rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
            box-shadow: 0 0 10px var(--primary);
        }
        .nav-desktop a:hover { color: var(--text-primary); }
        .nav-desktop a:hover::after { width: 100%; }
        .nav-desktop a.active {
            color: var(--primary);
        }
        .nav-desktop a.active::after {
            width: 100%;
        }
        .nav-desktop .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a !important;
            font-weight: 700;
            padding: 0.5rem 1.4rem;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(240, 184, 0, 0.2);
        }
        .nav-desktop .nav-cta::after { display: none; }
        .nav-desktop .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(240, 184, 0, 0.35);
            color: #0a0e1a !important;
        }

        /* ===== Mobile Bottom Tab ===== */
        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(10, 14, 26, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-color);
            padding: 0.4rem 0 env(safe-area-inset-bottom, 0.4rem);
            justify-content: space-around;
            align-items: center;
        }
        .bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.15rem;
            font-size: 0.7rem;
            color: var(--text-muted);
            padding: 0.3rem 0.6rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            min-width: 56px;
        }
        .bottom-tab a i { font-size: 1.25rem; }
        .bottom-tab a.active {
            color: var(--primary);
        }
        .bottom-tab a.active i {
            filter: drop-shadow(0 0 8px rgba(240, 184, 0, 0.5));
        }
        .bottom-tab a:hover { color: var(--text-primary); }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 8rem 0 4rem;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            min-height: 320px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.88) 40%, rgba(10, 14, 26, 0.6) 80%, transparent);
            z-index: 1;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(240, 184, 0, 0.08) 0%, transparent 60%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 1.5rem;
        }
        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
        }
        .banner-tags span {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(240, 184, 0, 0.12);
            border: 1px solid rgba(240, 184, 0, 0.2);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--primary-light);
        }

        /* ===== Section Common ===== */
        section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            margin-bottom: 0.5rem;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-title .title-accent {
            display: inline-block;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin-top: 0.75rem;
            box-shadow: 0 0 12px var(--primary);
        }

        /* ===== Guide Overview ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .overview-content h2 {
            text-align: left;
            margin-bottom: 1rem;
        }
        .overview-content .lead {
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 1.5rem;
        }
        .overview-list {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .overview-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            color: var(--text-secondary);
        }
        .overview-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 0.2rem;
            flex-shrink: 0;
        }
        .overview-image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            width: 100%;
            height: auto;
        }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .step-card:hover::before { opacity: 1; }
        .step-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(240, 184, 0, 0.15), rgba(0, 212, 255, 0.1));
            border: 1px solid rgba(240, 184, 0, 0.25);
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .step-card h4 {
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        .step-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== Feature Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .feature-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .feature-card .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-card .card-body h4 {
            margin-bottom: 0.5rem;
        }
        .feature-card .card-body p {
            font-size: 0.9rem;
            flex: 1;
            margin-bottom: 1rem;
        }
        .feature-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.75rem;
            color: var(--primary);
            background: rgba(240, 184, 0, 0.1);
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            align-self: flex-start;
            border: 1px solid rgba(240, 184, 0, 0.15);
        }

        /* ===== Tips ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .tip-item {
            display: flex;
            gap: 1rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 1.5rem;
            transition: var(--transition);
        }
        .tip-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            transform: translateY(-3px);
        }
        .tip-item .tip-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(240, 184, 0, 0.12), rgba(0, 212, 255, 0.08));
            border: 1px solid rgba(240, 184, 0, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary);
        }
        .tip-item h4 {
            font-size: 1rem;
            margin-bottom: 0.25rem;
        }
        .tip-item p {
            font-size: 0.88rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            padding: 1.2rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
            gap: 1rem;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.active i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }
        .faq-answer p {
            font-size: 0.92rem;
            margin-bottom: 0;
            color: var(--text-secondary);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(240, 184, 0, 0.06), rgba(0, 212, 255, 0.04));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
            padding: 4rem 0;
        }
        .cta-section h2 {
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            max-width: 540px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a;
            box-shadow: 0 0 24px rgba(240, 184, 0, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 36px rgba(240, 184, 0, 0.35);
            color: #0a0e1a;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(240, 184, 0, 0.1);
            transform: translateY(-3px);
            border-color: var(--primary-light);
            color: var(--primary-light);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 1.5rem 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 1.5rem;
            margin-bottom: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo { margin-bottom: 0.75rem; }
        .footer-brand p { font-size: 0.9rem; margin-bottom: 0; }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
        .footer-col ul a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .footer-col ul a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 1.5rem;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-bottom span { font-size: 0.85rem; color: var(--text-muted); }
        .footer-social { display: flex; gap: 0.75rem; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(240, 184, 0, 0.08);
            border: 1px solid rgba(240, 184, 0, 0.12);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: rgba(240, 184, 0, 0.18);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
        }
        @media (max-width: 768px) {
            html { font-size: 15px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .page-banner h1 { font-size: 2.2rem; }
            .page-banner { padding: 6rem 0 3rem; min-height: 260px; }
            .nav-desktop { display: none; }
            .bottom-tab { display: flex; }
            .header { padding: 0.5rem 0; }
            .overview-grid { grid-template-columns: 1fr; gap: 2rem; }
            .overview-image { order: -1; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .features-grid { grid-template-columns: 1fr; }
            .tips-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer { margin-bottom: 56px; }
            .section-title p { font-size: 0.95rem; }
            .cta-section { padding: 3rem 0; }
            .banner-tags span { font-size: 0.72rem; padding: 0.2rem 0.8rem; }
        }
        @media (max-width: 520px) {
            html { font-size: 14px; }
            .container { padding: 0 1rem; }
            h1 { font-size: 1.7rem; }
            h2 { font-size: 1.4rem; }
            .page-banner h1 { font-size: 1.8rem; }
            .page-banner p { font-size: 0.95rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .step-card { padding: 1.5rem; }
            .feature-card .card-img { height: 160px; }
            .tip-item { flex-direction: column; align-items: flex-start; }
            .faq-question { padding: 1rem 1.2rem; font-size: 0.9rem; }
            .faq-answer.open { padding: 0 1.2rem 1rem; }
            .btn { padding: 0.6rem 1.4rem; font-size: 0.9rem; }
            .cta-buttons { flex-direction: column; width: 100%; }
            .cta-buttons .btn { width: 100%; justify-content: center; }
            .bottom-tab a { min-width: 48px; font-size: 0.65rem; }
            .bottom-tab a i { font-size: 1.1rem; }
            .footer-brand p { font-size: 0.85rem; }
            .footer-col ul a { font-size: 0.85rem; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #00a8cc;
            --primary-glow: rgba(0, 212, 255, 0.3);
            --secondary: #7c3aed;
            --secondary-glow: rgba(124, 58, 237, 0.3);
            --accent: #f59e0b;
            --accent-glow: rgba(245, 158, 11, 0.3);
            --bg-dark: #0a0e17;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-surface: #0f172a;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(0, 212, 255, 0.15);
            --border-glow: rgba(0, 212, 255, 0.3);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 72px;
            --bottom-nav-height: 64px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            padding-top: var(--nav-height);
            padding-bottom: var(--bottom-nav-height);
        }
        @media (min-width: 769px) {
            body {
                padding-bottom: 0;
            }
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--primary);
            transform: scale(1.02);
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .logo-text {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-desktop a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
            box-shadow: 0 0 8px var(--primary-glow);
        }
        .nav-desktop a:hover {
            color: var(--text-primary);
            background: rgba(0, 212, 255, 0.08);
        }
        .nav-desktop a:hover::after {
            width: 60%;
        }
        .nav-desktop a.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.1);
        }
        .nav-desktop a.active::after {
            width: 60%;
        }
        .nav-desktop a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 20px var(--primary-glow);
            margin-left: 8px;
        }
        .nav-desktop a.nav-cta::after {
            display: none;
        }
        .nav-desktop a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--primary-glow);
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
        }
        .nav-desktop a.nav-cta i {
            margin-right: 6px;
        }

        /* ===== 移动端底部 Tab 导航 ===== */
        .bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--bottom-nav-height);
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-color);
            box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.5);
            justify-content: space-around;
            align-items: center;
            padding: 0 8px;
        }
        .bottom-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.65rem;
            color: var(--text-muted);
            transition: var(--transition);
            min-width: 60px;
            font-weight: 500;
        }
        .bottom-nav a i {
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .bottom-nav a:hover {
            color: var(--text-secondary);
            background: rgba(0, 212, 255, 0.05);
        }
        .bottom-nav a.active {
            color: var(--primary);
        }
        .bottom-nav a.active i {
            text-shadow: 0 0 12px var(--primary-glow);
        }
        .bottom-nav a.nav-cta-tab {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 50%;
            width: 48px;
            height: 48px;
            min-width: unset;
            padding: 0;
            margin-top: -12px;
            box-shadow: 0 4px 20px var(--primary-glow);
        }
        .bottom-nav a.nav-cta-tab i {
            font-size: 1.2rem;
        }
        .bottom-nav a.nav-cta-tab:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .bottom-nav {
                display: flex;
            }
            .header .container .logo {
                font-size: 1.1rem;
            }
            .header .container .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 60px;
            overflow: hidden;
            background: var(--bg-card);
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('<?php echo $cmsBanner; ?>') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 23, 0.7) 0%, rgba(10, 14, 23, 0.9) 100%);
            z-index: 1;
        }
        .article-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .article-banner .banner-category {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            box-shadow: 0 4px 16px var(--primary-glow);
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-banner .banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-banner .banner-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner .banner-meta i {
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .article-banner {
                min-height: 280px;
                padding: 60px 16px 40px;
            }
            .article-banner h1 {
                font-size: 1.8rem;
            }
            .article-banner .banner-meta {
                gap: 16px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner .banner-meta {
                flex-direction: column;
                gap: 8px;
            }
        }

        /* ===== 文章正文 ===== */
        .article-content {
            padding: 60px 0 40px;
        }
        .article-content .container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 48px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .article-main .content-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-main .content-body p {
            margin-bottom: 1.5em;
        }
        .article-main .content-body h2,
        .article-main .content-body h3,
        .article-main .content-body h4 {
            color: var(--text-primary);
            margin-top: 2em;
            margin-bottom: 0.8em;
        }
        .article-main .content-body h2 {
            font-size: 1.6rem;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-main .content-body h3 {
            font-size: 1.3rem;
        }
        .article-main .content-body ul,
        .article-main .content-body ol {
            margin-bottom: 1.5em;
            padding-left: 1.2em;
        }
        .article-main .content-body ul li,
        .article-main .content-body ol li {
            margin-bottom: 0.5em;
            position: relative;
            padding-left: 1.2em;
        }
        .article-main .content-body ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.7em;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary-glow);
        }
        .article-main .content-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-main .content-body a:hover {
            color: var(--accent);
        }
        .article-main .content-body blockquote {
            border-left: 4px solid var(--secondary);
            background: rgba(124, 58, 237, 0.08);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-main .content-body img {
            border-radius: var(--radius-md);
            margin: 1.5em 0;
            box-shadow: var(--shadow-md);
        }
        .article-main .content-body code {
            background: rgba(0, 212, 255, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary);
        }
        .article-main .content-body pre {
            background: var(--bg-dark);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            overflow-x: auto;
            margin: 1.5em 0;
        }
        .article-main .content-body pre code {
            background: none;
            padding: 0;
            color: var(--text-secondary);
        }

        /* ===== 文章侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--primary);
        }
        .sidebar-card ul li {
            margin-bottom: 10px;
        }
        .sidebar-card ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .sidebar-card ul li a::before {
            content: '›';
            color: var(--primary);
            font-weight: 700;
            font-size: 1.1rem;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            background: rgba(0, 212, 255, 0.08);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .sidebar-tags a:hover {
            background: rgba(0, 212, 255, 0.15);
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
        }

        @media (max-width: 1024px) {
            .article-content .container {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .article-main {
                padding: 32px 28px;
            }
        }
        @media (max-width: 768px) {
            .article-content {
                padding: 40px 0 30px;
            }
            .article-main {
                padding: 24px 20px;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .article-main .content-body {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 480px) {
            .article-main {
                padding: 20px 16px;
                border-radius: var(--radius-sm);
            }
            .article-main .content-body {
                font-size: 0.9rem;
            }
        }

        /* ===== 文章标签与分享 ===== */
        .article-footer-meta {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .article-tags span {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-right: 4px;
        }
        .article-tags a {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            background: rgba(0, 212, 255, 0.08);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags a:hover {
            background: rgba(0, 212, 255, 0.15);
            color: var(--primary);
            border-color: var(--primary);
        }
        .article-share {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .article-share span {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .article-share a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.08);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
            transform: translateY(-2px);
        }
        @media (max-width: 480px) {
            .article-footer-meta {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-surface);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 1.8rem;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        .related-section .section-title i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            border-color: var(--border-glow);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 18px 20px 20px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a {
            color: var(--text-primary);
        }
        .related-card .card-body h4 a:hover {
            color: var(--primary);
        }
        .related-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .related-card .card-body .card-meta i {
            color: var(--primary);
            font-size: 0.7rem;
        }
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
            .related-card .card-img {
                height: 200px;
            }
        }

        /* ===== FAQ 板块 ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg-dark);
        }
        .faq-section .section-title {
            text-align: center;
            font-size: 1.8rem;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        .faq-section .section-title i {
            color: var(--accent);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            gap: 12px;
        }
        .faq-item .faq-question i {
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        @media (max-width: 768px) {
            .faq-section .section-title {
                font-size: 1.4rem;
            }
            .faq-item {
                padding: 16px 18px;
            }
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-surface);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            cursor: pointer;
        }
        .cta-btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 24px var(--primary-glow);
        }
        .cta-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 40px var(--primary-glow);
            color: #fff;
        }
        .cta-btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .cta-btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-primary);
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary-glow);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer-col ul li a i {
            width: 20px;
            color: var(--primary);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.08);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
            transform: translateY(-2px);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .footer {
                padding: 40px 0 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 内容未找到 ===== */
        .not-found {
            text-align: center;
            padding: 100px 24px;
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found h2 {
            font-size: 2rem;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 20px var(--primary-glow);
            transition: var(--transition);
        }
        .not-found a:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px var(--primary-glow);
            color: #fff;
        }

        /* ===== 加载动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.3rem;
            }
            .article-main .content-body h2 {
                font-size: 1.3rem;
                padding-left: 12px;
            }
            .article-main .content-body h3 {
                font-size: 1.1rem;
            }
            .related-section .section-title i {
                font-size: 1.2rem;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
        }