/* ===== CSS 全局重置与变量 ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --bg: #f5f2ed;
            --bg-card: rgba(255, 255, 255, 0.75);
            --text: #1e1e2a;
            --text-secondary: #3d3d4a;
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --gradient: linear-gradient(135deg, #c0392b 0%, #e67e22 100%);
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            --radius: 20px;
            --glass: rgba(255, 255, 255, 0.30);
            --glass-border: rgba(255, 255, 255, 0.18);
            --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        [data-theme="dark"] {
            --bg: #12121a;
            --bg-card: rgba(30, 30, 46, 0.85);
            --text: #ececf0;
            --text-secondary: #b0b0c0;
            --glass: rgba(30, 30, 46, 0.50);
            --glass-border: rgba(255, 255, 255, 0.08);
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            transition: background var(--transition), color var(--transition);
            line-height: 1.7;
            padding: 0 20px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }

        /* ===== 毛玻璃效果 ===== */
        .glass {
            background: var(--glass);
            backdrop-filter: blur(18px) saturate(180%);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        /* ===== 渐变Banner ===== */
        .hero-banner {
            background: var(--gradient);
            border-radius: var(--radius);
            padding: 80px 40px;
            margin: 20px 0 40px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
            min-height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
        }
        .hero-banner::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }
        .hero-banner h1 {
            font-size: clamp(2.6rem, 7vw, 4.8rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 1;
        }
        .hero-banner p {
            font-size: clamp(1.1rem, 2vw, 1.6rem);
            opacity: 0.92;
            max-width: 720px;
            margin: 16px auto 0;
            position: relative;
            z-index: 1;
        }

        /* ===== 导航 ===== */
        header {
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg);
            transition: background var(--transition);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo span {
            color: var(--text);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        nav a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: color var(--transition);
            position: relative;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width var(--transition);
        }
        nav a:hover::after,
        nav a.active::after {
            width: 100%;
        }
        nav a:hover {
            color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-actions button {
            background: none;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            color: var(--text);
            transition: color var(--transition);
            padding: 4px 8px;
            border-radius: 8px;
        }
        .nav-actions button:hover {
            color: var(--primary);
            background: var(--glass);
        }
        .search-box {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--glass);
            border-radius: 40px;
            padding: 6px 16px;
            border: 1px solid var(--glass-border);
            transition: border var(--transition);
        }
        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text);
            font-size: 0.9rem;
            padding: 6px 0;
            width: 140px;
        }
        .search-box input::placeholder {
            color: var(--text-secondary);
            opacity: 0.6;
        }
        .search-box button {
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 1rem;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 12px 0 8px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            opacity: 0.6;
        }

        /* ===== 卡片通用 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            margin: 28px 0;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            backdrop-filter: blur(8px);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
        }
        .card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--text);
        }
        .card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .card .icon {
            font-size: 2.4rem;
            margin-bottom: 12px;
            display: block;
        }

        /* ===== Section 标题 ===== */
        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
            color: var(--text);
        }
        .section-sub {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 28px;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .section {
            padding: 40px 0;
        }

        /* ===== 文章卡片 ===== */
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            border: 1px solid var(--glass-border);
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: var(--shadow);
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 44px rgba(0, 0, 0, 0.1);
        }
        .article-card h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text);
        }
        .article-card .meta {
            font-size: 0.8rem;
            color: var(--text-secondary);
            opacity: 0.7;
            margin-bottom: 8px;
        }
        .article-card p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--glass-border);
            padding: 16px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-q {
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            padding: 4px 0;
        }
        .faq-q::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-q::after {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary);
            padding: 0 0 0 8px;
        }
        .faq-item.open .faq-a {
            max-height: 300px;
            padding: 10px 0 4px 8px;
        }

        /* ===== HowTo ===== */
        .howto-step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 16px 0;
            border-bottom: 1px solid var(--glass-border);
        }
        .howto-step:last-child {
            border-bottom: none;
        }
        .howto-num {
            background: var(--primary);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .howto-content h4 {
            font-size: 1.05rem;
            color: var(--text);
            margin-bottom: 4px;
        }
        .howto-content p {
            color: var(--text-secondary);
            font-size: 0.93rem;
        }

        /* ===== 轮播 ===== */
        .carousel {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius);
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
        }
        .carousel-track {
            display: flex;
            transition: transform 0.6s ease;
        }
        .carousel-slide {
            min-width: 100%;
            padding: 40px 32px;
            text-align: center;
        }
        .carousel-slide img {
            margin: 0 auto 16px;
            border-radius: 12px;
            width: 100%;
            max-height: 240px;
            object-fit: cover;
        }
        .carousel-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: var(--glass);
            backdrop-filter: blur(8px);
            border: 1px solid var(--glass-border);
            color: var(--text);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            font-size: 1.4rem;
            cursor: pointer;
            z-index: 10;
            transition: background var(--transition);
        }
        .carousel-btn:hover {
            background: var(--primary);
            color: #fff;
        }
        .carousel-btn.prev {
            left: 12px;
        }
        .carousel-btn.next {
            right: 12px;
        }
        .carousel-dots {
            display: flex;
            justify-content: center;
            gap: 10px;
            padding: 16px 0 8px;
        }
        .carousel-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--text-secondary);
            opacity: 0.3;
            cursor: pointer;
            transition: opacity var(--transition), background var(--transition);
        }
        .carousel-dots span.active {
            opacity: 1;
            background: var(--primary);
        }

        /* ===== 数字滚动 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .stat-item .label {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* ===== 返回顶部 ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary);
            color: #fff;
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            font-size: 1.6rem;
            cursor: pointer;
            box-shadow: 0 8px 24px rgba(192, 57, 43, 0.4);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s, transform 0.4s, visibility 0.4s;
            z-index: 999;
            transform: scale(0.8);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }
        .back-top:hover {
            transform: scale(1.1);
            background: var(--primary-dark);
        }

        /* ===== 底部 ===== */
        footer {
            margin-top: 40px;
            padding: 40px 0 20px;
            border-top: 1px solid var(--glass-border);
            background: var(--bg-card);
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-grid h4 {
            font-size: 1rem;
            margin-bottom: 12px;
            color: var(--text);
        }
        .footer-grid a,
        .footer-grid p {
            display: block;
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 3px 0;
            transition: color var(--transition);
        }
        .footer-grid a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--glass-border);
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .qr-placeholder {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 12px;
        }
        .qr-placeholder svg {
            width: 100px;
            height: 100px;
            border-radius: 12px;
            background: #fff;
            padding: 8px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 768px) {
            body {
                padding: 0 12px;
            }
            header .container {
                flex-wrap: wrap;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 16px 0;
                background: var(--bg);
                border-radius: var(--radius);
                margin-top: 8px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 16px;
                border-radius: 10px;
                background: var(--glass);
            }
            .mobile-toggle {
                display: block;
            }
            .search-box input {
                width: 100px;
            }
            .hero-banner {
                padding: 50px 20px;
                min-height: 280px;
            }
            .hero-banner h1 {
                font-size: 2.2rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .howto-step {
                flex-direction: column;
                align-items: flex-start;
            }
            .carousel-btn {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .back-top {
                bottom: 16px;
                right: 16px;
                width: 44px;
                height: 44px;
                font-size: 1.3rem;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .search-box input {
                width: 80px;
            }
            .card {
                padding: 20px 16px;
            }
            .hero-banner {
                padding: 36px 16px;
                min-height: 220px;
            }
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 暗色模式切换图标 ===== */
        .theme-toggle .icon-light {
            display: inline;
        }
        .theme-toggle .icon-dark {
            display: none;
        }
        [data-theme="dark"] .theme-toggle .icon-light {
            display: none;
        }
        [data-theme="dark"] .theme-toggle .icon-dark {
            display: inline;
        }

        /* 图片懒加载占位 */
        .lazy-placeholder {
            background: var(--glass);
            min-height: 180px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .lazy-placeholder svg {
            width: 100%;
            height: auto;
            max-height: 200px;
        }