/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #f0a830;
            --color-primary-hover: #d49420;
            --color-primary-light: #fdf0d5;
            --color-secondary: #6c5ce7;
            --color-secondary-hover: #5a4bd6;
            --color-accent: #e84560;
            --color-bg-dark: #0d0f14;
            --color-bg-card: rgba(20, 22, 30, 0.85);
            --color-bg-glass: rgba(18, 20, 28, 0.7);
            --color-bg-section: #111318;
            --color-bg-elevated: #1a1d26;
            --color-text-primary: #f0f0f2;
            --color-text-secondary: #b8bac2;
            --color-text-weak: #7e808a;
            --color-text-on-dark: #e8e9ed;
            --color-border: rgba(255, 255, 255, 0.10);
            --color-border-light: rgba(255, 255, 255, 0.16);
            --color-border-strong: rgba(255, 255, 255, 0.22);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 14px 48px rgba(0, 0, 0, 0.5);
            --shadow-glass: 0 4px 20px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(240, 168, 48, 0.18);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-2xl: 80px;
            --spacing-3xl: 110px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1240px;
            --nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            cursor: pointer;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / 透明玻璃导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(13, 15, 20, 0.55);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-glass);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(13, 15, 20, 0.92);
            box-shadow: var(--shadow-md);
            border-bottom-color: var(--color-border-light);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: var(--spacing-md);
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--color-primary);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), #e89a1a);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            color: #1a1d26;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--color-text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links a.active-nav {
            color: var(--color-primary);
            background: rgba(240, 168, 48, 0.12);
            font-weight: 600;
        }

        .nav-links a.active-nav::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-primary);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--color-primary), #e89a1a);
            color: #1a1d26;
            transition: all var(--transition-fast);
            white-space: nowrap;
            flex-shrink: 0;
            box-shadow: 0 4px 16px rgba(240, 168, 48, 0.3);
        }

        .nav-cta:hover {
            background: linear-gradient(135deg, #f5b840, #eda830);
            box-shadow: 0 6px 24px rgba(240, 168, 48, 0.45);
            transform: translateY(-1px);
            color: #1a1d26;
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--color-text-primary);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px;
            line-height: 1;
            transition: color var(--transition-fast);
        }

        .mobile-menu-btn:hover {
            color: var(--color-primary);
        }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(13, 15, 20, 0.55) 0%,
                    rgba(13, 15, 20, 0.75) 40%,
                    rgba(13, 15, 20, 0.9) 75%,
                    var(--color-bg-dark) 100%);
            z-index: 1;
        }

        .hero-glow {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 168, 48, 0.12) 0%, transparent 70%);
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 780px;
            padding: 140px 24px 80px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: var(--radius-full);
            background: rgba(240, 168, 48, 0.15);
            border: 1px solid rgba(240, 168, 48, 0.3);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-md);
            backdrop-filter: blur(6px);
        }

        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(240, 168, 48, 0.6);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(240, 168, 48, 0);
            }
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.2;
            color: var(--color-text-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .hero-title .highlight {
            color: var(--color-primary);
            position: relative;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--color-text-secondary);
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), #e89a1a);
            color: #1a1d26;
            box-shadow: 0 6px 24px rgba(240, 168, 48, 0.35);
        }

        .btn-primary:hover {
            box-shadow: 0 10px 32px rgba(240, 168, 48, 0.5);
            transform: translateY(-2px);
            background: linear-gradient(135deg, #f5b840, #eda830);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-text-primary);
            border: 1.5px solid var(--color-border-light);
            backdrop-filter: blur(8px);
        }

        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(240, 168, 48, 0.08);
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-2xl) 0;
            position: relative;
        }

        .section-dark {
            background: var(--color-bg-section);
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-primary);
            margin-bottom: var(--spacing-xs);
        }

        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.3rem);
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== 核心特性卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all 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(--color-primary), var(--color-secondary));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

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

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(240, 168, 48, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: var(--spacing-sm);
            color: var(--color-primary);
            transition: all var(--transition-base);
        }

        .feature-card:hover .feature-icon {
            background: rgba(240, 168, 48, 0.2);
            box-shadow: var(--shadow-glow);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ===== 分类入口卡片 ===== */
        .category-card {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
            cursor: pointer;
            overflow: hidden;
        }

        .category-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .category-card-img {
            width: 120px;
            height: 90px;
            border-radius: var(--radius-md);
            object-fit: cover;
            flex-shrink: 0;
        }

        .category-card-info h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 4px;
        }

        .category-card-info p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

        .category-card-info .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: 6px;
            transition: gap var(--transition-fast);
        }

        .category-card:hover .arrow-link {
            gap: 10px;
        }

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

        .step-item {
            text-align: center;
            position: relative;
            padding: 28px 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: all var(--transition-base);
        }

        .step-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), #e89a1a);
            color: #1a1d26;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: var(--spacing-sm);
            box-shadow: 0 4px 16px rgba(240, 168, 48, 0.3);
        }

        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

        /* ===== 最新信息列表（CMS） ===== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .news-card {
            display: flex;
            gap: var(--spacing-sm);
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-sm);
            transition: all var(--transition-base);
        }

        .news-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .news-card-thumb {
            width: 100px;
            height: 75px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }

        .news-card-info {
            flex: 1;
            min-width: 0;
        }

        .news-card-info .news-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(240, 168, 48, 0.1);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            margin-bottom: 6px;
        }

        .news-card-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-info .news-meta {
            font-size: 0.78rem;
            color: var(--color-text-weak);
        }

        .news-empty {
            text-align: center;
            color: var(--color-text-weak);
            padding: 40px;
            font-size: 0.95rem;
        }

        /* ===== 封面墙 / 精选内容 ===== */
        .cover-wall {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .cover-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 16 / 11;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid var(--color-border);
        }

        .cover-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border-light);
        }

        .cover-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition-slow);
        }

        .cover-card:hover img {
            transform: scale(1.06);
        }

        .cover-card-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
            z-index: 1;
        }

        .cover-card-overlay h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 2px;
        }

        .cover-card-overlay span {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.75);
        }

        .cover-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            background: rgba(0, 0, 0, 0.55);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
            text-align: center;
        }

        .stat-item {
            padding: var(--spacing-md);
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: all var(--transition-base);
        }

        .stat-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: var(--spacing-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: none;
            color: var(--color-text-primary);
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            cursor: pointer;
            transition: color var(--transition-fast);
            gap: 12px;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: all var(--transition-base);
            color: var(--color-text-weak);
        }

        .faq-item:hover .faq-icon {
            background: rgba(240, 168, 48, 0.15);
            color: var(--color-primary);
        }

        .faq-answer {
            padding: 0 22px 18px;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }

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

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(240, 168, 48, 0.15);
            color: var(--color-primary);
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: var(--spacing-2xl) 0;
            background: var(--color-bg-elevated);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .cta-section .section-title {
            margin-bottom: var(--spacing-sm);
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            justify-content: center;
            margin-top: var(--spacing-md);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-section);
            border-top: 1px solid var(--color-border);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand .footer-logo {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-text-primary);
            margin-bottom: 8px;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            max-width: 300px;
        }

        .footer-links h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-text-primary);
            margin-bottom: 12px;
        }

        .footer-links ul li {
            margin-bottom: 8px;
        }

        .footer-links ul li a {
            font-size: 0.88rem;
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }

        .footer-links ul li a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--color-border);
            font-size: 0.8rem;
            color: var(--color-text-weak);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cover-wall {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: clamp(2rem, 4vw, 2.8rem);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(13, 15, 20, 0.96);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                border-radius: var(--radius-md);
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-cta {
                display: none;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cover-wall {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .section {
                padding: var(--spacing-xl) 0;
            }
            .hero-content {
                padding-top: 110px;
                padding-bottom: 60px;
            }
            .category-card {
                flex-direction: column;
                text-align: center;
            }
            .category-card-img {
                width: 100%;
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card-thumb {
                width: 100%;
                height: 140px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 1.4rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #6c3bd4;
            --primary-light: #8b5cf6;
            --primary-dark: #5528b5;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-dark: #0b0b18;
            --bg-dark-2: #111128;
            --bg-card: #ffffff;
            --bg-card-alt: #f8f9fb;
            --bg-glass: rgba(17, 17, 40, 0.72);
            --text-dark: #1a1a2e;
            --text-body: #374151;
            --text-light: #e8e8f2;
            --text-muted: #9ca3af;
            --text-muted-dark: #6b7280;
            --border: #e5e7eb;
            --border-light: #f0f0f5;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow: 0 4px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.18);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 0;
            transition: all var(--transition);
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            box-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.85;
        }
        .logo .logo-icon {
            display: inline-block;
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 50%;
            margin-right: 8px;
            vertical-align: middle;
            box-shadow: 0 0 12px rgba(245, 158, 11, 0.5);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: inline-block;
            padding: 9px 18px;
            border-radius: 28px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255,255,255,0.82);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.1);
        }
        .nav-links a.active-nav,
        .nav-links a.active-nav:hover {
            color: #ffffff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(108, 59, 212, 0.4);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: #ffffff;
            font-size: 1.6rem;
            line-height: 1;
        }

        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            position: relative;
            padding: 150px 0 80px;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            background-color: var(--bg-dark-2);
            min-height: 420px;
            display: flex;
            align-items: flex-end;
            z-index: 1;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,11,24,0.55) 0%, rgba(11,11,24,0.85) 60%, var(--bg-dark) 100%);
            z-index: 0;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .banner-category {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary);
            color: #fff;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article-banner .banner-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.35;
            margin-bottom: 14px;
            max-width: 800px;
        }
        .article-banner .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-banner .banner-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner .banner-meta .meta-icon {
            font-size: 1rem;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .article-main {
            padding: 0 0 60px;
            position: relative;
            z-index: 2;
            margin-top: -30px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 36px;
            align-items: start;
        }
        .article-content-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 44px 48px;
            box-shadow: var(--shadow-lg);
            min-height: 400px;
        }
        .article-content-card .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-body);
        }
        .article-content-card .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 32px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-content-card .article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 24px 0 12px;
        }
        .article-content-card .article-body p {
            margin-bottom: 16px;
        }
        .article-content-card .article-body ul,
        .article-content-card .article-body ol {
            margin: 12px 0 20px 20px;
        }
        .article-content-card .article-body li {
            margin-bottom: 8px;
        }
        .article-content-card .article-body img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        .article-content-card .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-card-alt);
            padding: 16px 24px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted-dark);
            font-style: italic;
        }
        .article-content-card .article-body code {
            background: #f3f4f6;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }

        .article-not-found {
            text-align: center;
            padding: 60px 30px;
        }
        .article-not-found .nf-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            display: block;
        }
        .article-not-found h2 {
            font-size: 1.6rem;
            color: var(--text-dark);
            margin-bottom: 12px;
            font-weight: 700;
        }
        .article-not-found p {
            color: var(--text-muted-dark);
            margin-bottom: 24px;
            font-size: 1rem;
        }
        .btn-back {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(108, 59, 212, 0.35);
        }
        .btn-back:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 28px rgba(108, 59, 212, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ========== SIDEBAR ========== */
        .article-sidebar {
            position: sticky;
            top: 100px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
        }
        .sidebar-card .side-post-item {
            display: flex;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
            border-radius: var(--radius-sm);
        }
        .sidebar-card .side-post-item:last-child {
            border-bottom: none;
        }
        .sidebar-card .side-post-item:hover {
            background: var(--bg-card-alt);
            padding-left: 8px;
            padding-right: 8px;
            margin: 0 -8px;
        }
        .sidebar-card .side-post-thumb {
            width: 64px;
            height: 48px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            background: #e5e7eb;
        }
        .sidebar-card .side-post-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-card .side-post-info .sp-title {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .sidebar-card .side-post-item:hover .sp-title {
            color: var(--primary);
        }
        .sidebar-card .side-post-info .sp-date {
            font-size: 0.78rem;
            color: var(--text-muted-dark);
            margin-top: 4px;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags .tag {
            display: inline-block;
            padding: 5px 14px;
            background: var(--bg-card-alt);
            border-radius: 18px;
            font-size: 0.82rem;
            color: var(--text-muted-dark);
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .sidebar-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(108, 59, 212, 0.04);
        }

        /* ========== RELATED POSTS SECTION ========== */
        .related-section {
            padding: 60px 0 80px;
            position: relative;
            z-index: 2;
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .related-section .section-header .section-line {
            display: block;
            width: 50px;
            height: 3px;
            background: var(--accent);
            margin: 0 auto;
            border-radius: 2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
        }
        .related-card .rc-image {
            width: 100%;
            height: 170px;
            object-fit: cover;
            background: #e0e0e8;
            display: block;
        }
        .related-card .rc-body {
            padding: 18px 16px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .rc-cat {
            font-size: 0.78rem;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 6px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .related-card .rc-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
            transition: color var(--transition);
        }
        .related-card:hover .rc-title {
            color: var(--primary);
        }
        .related-card .rc-date {
            font-size: 0.8rem;
            color: var(--text-muted-dark);
            margin-top: auto;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 70px 0;
            position: relative;
            z-index: 2;
            background: var(--bg-dark-2);
            border-top: 1px solid rgba(255,255,255,0.05);
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .cta-inner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            border-radius: var(--radius-xl);
            padding: 52px 48px;
            text-align: center;
            box-shadow: 0 16px 60px rgba(108, 59, 212, 0.3);
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: rgba(255,255,255,0.06);
            border-radius: 50%;
        }
        .cta-inner::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -30px;
            width: 160px;
            height: 160px;
            background: rgba(255,255,255,0.04);
            border-radius: 50%;
        }
        .cta-inner h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-inner p {
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-block;
            padding: 14px 38px;
            background: #ffffff;
            color: var(--primary-dark);
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            position: relative;
            z-index: 1;
            box-shadow: 0 6px 24px rgba(0,0,0,0.15);
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0,0,0,0.25);
            color: var(--primary-dark);
            background: #fefefe;
        }

        /* ========== FAQ SECTION ========== */
        .faq-section {
            padding: 70px 0 60px;
            position: relative;
            z-index: 2;
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .faq-section .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .faq-section .section-header .section-line {
            display: block;
            width: 50px;
            height: 3px;
            background: var(--accent);
            margin: 0 auto;
            border-radius: 2px;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
            max-width: 900px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid transparent;
            cursor: default;
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow);
        }
        .faq-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .faq-item p {
            font-size: 0.92rem;
            color: var(--text-muted-dark);
            line-height: 1.65;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark-2);
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 56px 0 28px;
            position: relative;
            z-index: 2;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer-links h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links ul li {
            margin-bottom: 9px;
        }
        .footer-links ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-links ul li a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.82rem;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1100px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 24px;
            }
            .article-content-card {
                padding: 32px 28px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 900px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                top: auto;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .article-sidebar .sidebar-card {
                margin-bottom: 0;
            }
            .faq-grid {
                grid-template-columns: 1fr;
                max-width: 600px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .article-banner .banner-title {
                font-size: 1.8rem;
            }
            .nav-links a {
                padding: 8px 14px;
                font-size: 0.88rem;
            }
        }
        @media (max-width: 640px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .logo {
                font-size: 1.15rem;
            }
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 7px 11px;
                font-size: 0.8rem;
                border-radius: 20px;
            }
            .mobile-toggle {
                display: block;
            }
            .article-banner {
                padding: 120px 0 50px;
                min-height: 300px;
            }
            .article-banner .banner-title {
                font-size: 1.4rem;
            }
            .article-content-card {
                padding: 24px 18px;
                border-radius: var(--radius);
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .related-card .rc-image {
                height: 130px;
            }
            .cta-inner {
                padding: 36px 24px;
            }
            .cta-inner h2 {
                font-size: 1.4rem;
            }
            .faq-section .section-header h2,
            .related-section .section-header h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .container {
                padding: 0 16px;
            }
        }
        @media (max-width: 420px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-banner .banner-title {
                font-size: 1.2rem;
            }
            .article-banner .banner-meta {
                font-size: 0.78rem;
                gap: 12px;
            }
            .article-content-card {
                padding: 20px 14px;
            }
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #f0a830;
            --primary-glow: #f0a83066;
            --primary-dark: #c88018;
            --accent: #4da6ff;
            --accent-glow: #4da6ff44;
            --bg-deep: #060609;
            --bg-dark: #0b0b14;
            --bg-card: #111122cc;
            --bg-card-hover: #181830dd;
            --bg-glass: #0d0d1a99;
            --text-primary: #f0ece4;
            --text-secondary: #b8b5ad;
            --text-muted: #7a776e;
            --border-subtle: #ffffff0d;
            --border-card: #ffffff10;
            --border-glow: #f0a83033;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 12px #00000033;
            --shadow-md: 0 6px 28px #0000004d;
            --shadow-lg: 0 12px 48px #00000066;
            --shadow-glow: 0 0 40px #f0a8301a;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --nav-height: 68px;
            --container-max: 1260px;
            --container-narrow: 960px;
            --section-gap: 72px;
        }

        /* ========== 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;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 30% 15%, #1a1030 0%, transparent 55%),
                radial-gradient(ellipse at 70% 60%, #0d1525 0%, transparent 55%),
                radial-gradient(ellipse at 50% 85%, #0f0a18 0%, transparent 50%);
            background-attachment: fixed;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        .container-narrow {
            max-width: var(--container-narrow);
        }

        /* ========== 页头 & 玻璃导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
        }

        .site-header.scrolled {
            background: #0b0b18e6;
            backdrop-filter: blur(20px) saturate(140%);
            -webkit-backdrop-filter: blur(20px) saturate(140%);
            box-shadow: 0 2px 24px #00000055;
            border-bottom: 1px solid var(--border-subtle);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }

        .nav-logo {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            position: relative;
            z-index: 1001;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), #d4891a);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #1a0a00;
            flex-shrink: 0;
            box-shadow: 0 0 18px var(--primary-glow);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            border-radius: 24px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: #ffffff08;
        }

        .nav-links a.active-nav {
            color: var(--primary);
            background: #f0a83012;
            font-weight: 600;
            box-shadow: inset 0 0 0 1px var(--border-glow);
        }

        .nav-links a.active-nav::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary-glow);
        }

        /* 移动端菜单按钮 */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: #ffffff08;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== 分类页 Banner ========== */
        .category-banner {
            position: relative;
            padding: 140px 0 80px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                linear-gradient(180deg, #060609e6 0%, #06060999 30%, #060609cc 70%, #060609f2 100%),
                radial-gradient(ellipse at 55% 40%, #f0a83015 0%, transparent 60%);
            z-index: 1;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            max-width: 700px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
            z-index: 2;
        }

        .banner-content {
            position: relative;
            z-index: 3;
            text-align: center;
        }

        .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .separator {
            font-size: 0.7rem;
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        .banner-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .banner-content h1 .highlight {
            background: linear-gradient(135deg, var(--primary), #f5c860);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .banner-content .banner-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.75;
        }

        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .banner-stat {
            text-align: center;
        }

        .banner-stat .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
        }

        .banner-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== 板块通用样式 ========== */
        .section {
            padding: var(--section-gap) 0;
            position: relative;
        }

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

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--primary);
            background: #f0a83010;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--border-glow);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 750;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== 精选内容网格 ========== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            cursor: pointer;
            position: relative;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .content-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow), var(--shadow-md);
            transform: translateY(-4px);
        }

        .content-card .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #0a0a16;
        }

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

        .content-card:hover .card-image-wrap img {
            transform: scale(1.06);
        }

        .card-play-btn {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.85);
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: #ffffff15;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 2px solid #ffffff30;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            opacity: 0;
            transition: all var(--transition-base);
            pointer-events: none;
        }

        .content-card:hover .card-play-btn {
            opacity: 1;
            transform: translate(-50%, -50%) scale(1);
        }

        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 13px;
            border-radius: 16px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            z-index: 2;
        }

        .card-badge.hot {
            background: linear-gradient(135deg, #e84040, #c02020);
            color: #fff;
            box-shadow: 0 2px 12px #e8404066;
        }

        .card-badge.platform {
            background: #4da6ff22;
            color: #4da6ff;
            border: 1px solid #4da6ff44;
        }

        .card-badge.help {
            background: #f0a83022;
            color: #f0a830;
            border: 1px solid #f0a83044;
        }

        .card-badge.info {
            background: #6c5ce722;
            color: #a29bfe;
            border: 1px solid #6c5ce744;
        }

        .card-body {
            padding: 20px 22px 22px;
        }

        .card-body h3 {
            font-size: 1.05rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-body .card-summary {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .card-meta .views-icon {
            color: var(--primary);
            font-size: 0.7rem;
        }

        /* ========== 横向封面墙 ========== */
        .cover-wall-section {
            background: #080812;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .cover-wall-wrapper {
            position: relative;
            overflow: hidden;
        }

        .cover-wall-track {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-behavior: smooth;
            padding: 16px 0 24px;
            scrollbar-width: thin;
            scrollbar-color: #ffffff15 transparent;
            -webkit-overflow-scrolling: touch;
        }

        .cover-wall-track::-webkit-scrollbar {
            height: 4px;
        }
        .cover-wall-track::-webkit-scrollbar-track {
            background: transparent;
        }
        .cover-wall-track::-webkit-scrollbar-thumb {
            background: #ffffff20;
            border-radius: 4px;
        }

        .cover-wall-item {
            flex: 0 0 auto;
            width: 260px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            transition: all var(--transition-base);
            cursor: pointer;
            position: relative;
        }

        .cover-wall-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .cover-wall-item .cover-img-wrap {
            aspect-ratio: 3 / 4;
            overflow: hidden;
            position: relative;
            background: #0a0a16;
        }

        .cover-wall-item .cover-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .cover-wall-item:hover .cover-img-wrap img {
            transform: scale(1.08);
        }

        .cover-wall-item .cover-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 30px 16px 14px;
            background: linear-gradient(transparent, #000000dd 40%);
        }

        .cover-wall-item .cover-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            line-height: 1.35;
        }

        .cover-wall-item .cover-channel {
            display: inline-block;
            font-size: 0.72rem;
            color: var(--primary);
            background: #00000055;
            padding: 3px 10px;
            border-radius: 12px;
            margin-bottom: 6px;
            letter-spacing: 0.04em;
        }

        .cover-wall-nav {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #111122cc;
            border: 1px solid #ffffff20;
            color: #fff;
            font-size: 1rem;
            cursor: pointer;
            z-index: 5;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .cover-wall-nav:hover {
            background: #1a1a35dd;
            border-color: var(--primary);
            color: var(--primary);
        }

        .cover-wall-nav.prev {
            left: -8px;
        }
        .cover-wall-nav.next {
            right: -8px;
        }

        /* ========== 下载步骤 ========== */
        .steps-section {
            position: relative;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .step-number {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #f0a83030, #f0a83008);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 10px;
        }

        .step-icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: #f0a83012;
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.3rem;
            color: var(--primary);
            transition: all var(--transition-base);
        }

        .step-card:hover .step-icon-wrap {
            background: #f0a83020;
            box-shadow: 0 0 20px var(--primary-glow);
        }

        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 步骤连接线 */
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 80px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--border-glow), var(--border-glow), transparent);
            z-index: 0;
            pointer-events: none;
        }

        .step-card {
            z-index: 1;
        }

        /* ========== 热门排行 ========== */
        .ranking-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            transition: all var(--transition-fast);
            cursor: pointer;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .ranking-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-sm);
        }

        .ranking-item .rank-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            flex-shrink: 0;
            background: #ffffff08;
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

        .ranking-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, #f0a830, #d4891a);
            color: #1a0a00;
            box-shadow: 0 0 16px var(--primary-glow);
            font-size: 1.15rem;
        }
        .ranking-item:nth-child(2) .rank-num {
            background: #b8c0d022;
            color: #c8d0d8;
            border: 1px solid #ffffff22;
            font-size: 1.1rem;
        }
        .ranking-item:nth-child(3) .rank-num {
            background: #c07a4022;
            color: #d49560;
            border: 1px solid #c07a4033;
            font-size: 1.05rem;
        }

        .ranking-item .rank-info {
            flex: 1;
            min-width: 0;
        }

        .ranking-item .rank-title {
            font-weight: 550;
            color: var(--text-primary);
            font-size: 0.98rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: color var(--transition-fast);
        }

        .ranking-item:hover .rank-title {
            color: var(--primary);
        }

        .ranking-item .rank-views {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .ranking-item .rank-trend {
            flex-shrink: 0;
            font-size: 0.78rem;
            padding: 4px 12px;
            border-radius: 14px;
            font-weight: 500;
        }

        .rank-trend.up {
            color: #4ecb71;
            background: #4ecb7115;
        }
        .rank-trend.hot {
            color: #e84040;
            background: #e8404018;
        }
        .rank-trend.stable {
            color: #aab;
            background: #ffffff08;
        }
        .rank-trend.new {
            color: #4da6ff;
            background: #4da6ff15;
        }

        /* ========== FAQ 手风琴 ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-fast);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .faq-item:hover {
            border-color: #ffffff18;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 0.98rem;
            font-weight: 550;
            color: var(--text-primary);
            text-align: left;
            gap: 14px;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #ffffff08;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition-base);
            color: var(--text-muted);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            background: #f0a83018;
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            text-align: center;
            background: linear-gradient(180deg, transparent, #0d0d1f 40%, #0d0d1f 60%, transparent);
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, #f0a83008 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }

        .cta-card {
            display: inline-block;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-glow);
            max-width: 600px;
            width: 100%;
        }

        .cta-card h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .cta-card p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 1rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.02em;
            cursor: pointer;
            transition: all var(--transition-base);
            background: linear-gradient(135deg, var(--primary), #d4891a);
            color: #1a0a00;
            border: none;
            box-shadow: 0 4px 20px var(--primary-glow);
            position: relative;
            overflow: hidden;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px #f0a83055;
            background: linear-gradient(135deg, #f5b840, #e09020);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px var(--primary-glow);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.02em;
            cursor: pointer;
            transition: all var(--transition-base);
            background: transparent;
            color: var(--text-primary);
            border: 1px solid #ffffff25;
            margin-left: 12px;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #f0a83008;
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #080812;
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-links h4 {
            font-size: 0.9rem;
            font-weight: 650;
            color: var(--text-secondary);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

        .footer-links ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 28px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ========== 响应式设计 ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 56px;
                --container-max: 100%;
            }

            .container {
                padding: 0 22px;
            }

            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .steps-grid::before {
                display: none;
            }

            .banner-content h1 {
                font-size: 2.2rem;
            }

            .cover-wall-item {
                width: 220px;
            }

            .section-title {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 44px;
                --nav-height: 60px;
            }

            .container {
                padding: 0 18px;
            }

            /* 导航移动端 */
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 72%;
                max-width: 340px;
                height: 100vh;
                background: #0b0b18f5;
                backdrop-filter: blur(28px);
                -webkit-backdrop-filter: blur(28px);
                flex-direction: column;
                justify-content: center;
                gap: 16px;
                padding: 40px 28px;
                transition: right var(--transition-base);
                z-index: 1000;
                border-left: 1px solid var(--border-subtle);
                box-shadow: -8px 0 32px #00000055;
            }

            .nav-links.open {
                right: 0;
            }

            .nav-links a {
                font-size: 1.05rem;
                padding: 14px 20px;
                width: 100%;
                justify-content: center;
            }

            .nav-toggle {
                display: flex;
            }

            .category-banner {
                padding: 110px 0 56px;
            }

            .banner-content h1 {
                font-size: 1.75rem;
            }

            .banner-content .banner-desc {
                font-size: 0.95rem;
            }

            .banner-stats {
                gap: 24px;
            }

            .banner-stat .stat-number {
                font-size: 1.5rem;
            }

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

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

            .cover-wall-item {
                width: 180px;
            }

            .cover-wall-nav {
                display: none;
            }

            .ranking-item {
                padding: 14px 16px;
                gap: 12px;
            }

            .ranking-item .rank-num {
                width: 34px;
                height: 34px;
                font-size: 0.9rem;
            }

            .cta-card {
                padding: 32px 24px;
                border-radius: var(--radius-lg);
            }

            .cta-card h3 {
                font-size: 1.3rem;
            }

            .btn-primary,
            .btn-outline {
                display: block;
                width: 100%;
                margin: 0 0 12px;
                text-align: center;
                justify-content: center;
            }

            .btn-outline {
                margin-left: 0;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .nav-logo {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }

            .category-banner {
                padding: 100px 0 44px;
            }

            .banner-content h1 {
                font-size: 1.45rem;
                letter-spacing: 0.01em;
            }

            .banner-stats {
                gap: 16px;
            }

            .banner-stat .stat-number {
                font-size: 1.25rem;
            }

            .banner-stat .stat-label {
                font-size: 0.75rem;
            }

            .content-card .card-body {
                padding: 14px 16px 16px;
            }

            .content-card .card-body h3 {
                font-size: 0.95rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .cover-wall-item {
                width: 150px;
            }

            .faq-question {
                font-size: 0.9rem;
                padding: 16px 18px;
            }

            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 0.84rem;
            }

            .ranking-item .rank-title {
                font-size: 0.88rem;
            }
        }

        /* ========== 焦点可见样式 ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 3px;
        }

        /* 移动端导航打开时防止body滚动 */
        body.nav-open {
            overflow: hidden;
        }

        /* 导航遮罩 */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: #00000066;
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .nav-overlay.show {
            display: block;
            opacity: 1;
        }