<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f9ff;
            color: #1e2a3e;
            line-height: 1.5;
        }

        /* 布局容器 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 头部样式 浅蓝背景 */
        .header {
            background: linear-gradient(135deg, #e9f2fa 0%, #d9e9fa 100%);
            border-bottom: 1px solid rgba(0, 112, 243, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(2px);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            flex-wrap: wrap;
        }

        .logo h1 {
            font-size: 28px;
            font-weight: 700;
            background: linear-gradient(135deg, #0070f3, #00a6ff);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            display: inline-block;
        }

        .logo span {
            font-size: 24px;
            font-weight: 600;
            color: #0070f3;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #1f2f3e;
            transition: 0.2s;
            font-size: 18px;
        }

        .nav-links a:hover {
            color: #0070f3;
        }

        /* 按钮 */
        .btn {
            display: inline-block;
            background: #0070f3;
            color: white;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            transition: 0.2s;
            border: none;
            cursor: pointer;
            font-size: 16px;
            box-shadow: 0 4px 8px rgba(0,112,243,0.2);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #0070f3;
            color: #0070f3;
            box-shadow: none;
        }
        .btn-outline:hover {
            background: #0070f3;
            color: white;
        }
        .btn:hover {
            transform: translateY(-2px);
            background: #005fcc;
        }

        /* 下载大区块 */
        .hero-download {
            background: linear-gradient(110deg, #eef5ff 0%, #ffffff 100%);
            border-radius: 48px;
            padding: 60px 40px;
            text-align: center;
            margin: 40px 0;
            box-shadow: 0 20px 35px -12px rgba(0,0,0,0.05);
        }
        .stats-mini {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .stat-card {
            text-align: center;
            background: white;
            padding: 12px 28px;
            border-radius: 48px;
            box-shadow: 0 6px 14px rgba(0,0,0,0.03);
        }
        /* 卡片网格 */
        .grid-3, .grid-4 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin: 40px 0;
        }
        .card {
            background: white;
            border-radius: 28px;
            padding: 28px 24px;
            box-shadow: 0 12px 28px rgba(0,0,0,0.05);
            transition: all 0.2s;
        }
        .card i {
            font-size: 40px;
            color: #0070f3;
        }
        .faq-item {
            background: white;
            margin-bottom: 16px;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 18px;
            background: #f8fafd;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid #eef2f8;
        }
        .faq-question .num {
            color: #0070f3;
            margin-right: 12px;
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: white;
            line-height: 1.6;
        }
        .faq-answer.show {
            padding: 20px 24px;
            max-height: 500px;
        }
        footer {
            background: #0a2540;
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: 60px;
        }
        .footer-col {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin: 20px 0;
        }
        .tag-cloud a {
            color: #a0c4ff;
            text-decoration: none;
            background: rgba(255,255,255,0.08);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 14px;
        }
        .news-item {
            border-bottom: 1px solid #e2edf7;
            padding: 14px 0;
        }
        @media (max-width: 768px) {
            .navbar {
                flex-direction: column;
                gap: 16px;
            }
            .hero-download {
                padding: 40px 20px;
            }
        }
        img {
            max-width: 100%;
            height: auto;
        }
    </style>