<style>
        :root {
            --primary: #1e6fff;
            --primary-dark: #1557c2;
            --bg: #f8faff;
            --surface: #ffffff;
            --text: #1a2332;
            --text-secondary: #4a5b6e;
            --border: #e8edf5;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
            --radius: 16px;
            --radius-sm: 10px;
            --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* 头部导航 */
        header {
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0 24px;
        }
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.3rem;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #1e6fff 0%, #3a8cff 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(30,111,255,0.3);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .nav-links a:hover { color: var(--primary); }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 14px rgba(30,111,255,0.35);
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(30,111,255,0.4);
        }
        .btn-outline {
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; }

        /* 通用版块 */
        section { padding: 64px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h1, .section-title h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; }
        .section-title p { color: var(--text-secondary); font-size: 1.05rem; max-width: 720px; margin: 0 auto; }

        /* 版本卡片网格 */
        .version-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
            margin-top: 32px;
        }
        .version-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 36px 24px 32px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .version-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: #c5d5f7;
        }
        .version-icon { font-size: 2.8rem; margin-bottom: 18px; }
        .version-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
        .version-meta { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 6px; }
        .btn-download {
            margin-top: 20px;
            background: var(--primary);
            color: #fff;
            padding: 10px 26px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 12px rgba(30,111,255,0.25);
            transition: var(--transition);
        }
        .btn-download:hover { background: var(--primary-dark); transform: scale(1.03); }

        /* 安装步骤 */
        .steps {
            display: flex;
            gap: 28px;
            justify-content: center;
            flex-wrap: wrap;
            text-align: center;
        }
        .step {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 32px 24px;
            flex: 1 1 180px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .step-number {
            width: 46px;
            height: 46px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .step h4 { margin-bottom: 6px; }

        /* FAQ */
        .faq-list { max-width: 860px; margin: 0 auto; }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            overflow: hidden;
        }
        .faq-question {
            padding: 16px 20px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 0.95rem;
        }
        .faq-answer { padding: 0 20px 16px; color: var(--text-secondary); display: none; }
        .faq-item.open .faq-answer { display: block; }

        /* CTA 区域 */
        .cta-box {
            background: linear-gradient(135deg, #eef3ff 0%, #e0ebff 100%);
            border-radius: var(--radius);
            padding: 48px;
            text-align: center;
        }
        .cta-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .cta-box p { margin-bottom: 24px; color: var(--text-secondary); }

        /* 底部 */
        footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 48px 0 32px;
            color: var(--text-secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 { font-weight: 700; margin-bottom: 14px; color: var(--text); }
        .footer-col ul { list-style: none; }
        .footer-col li { margin-bottom: 8px; font-size: 0.9rem; }
        .footer-bottom {
            text-align: center;
            font-size: 0.85rem;
            border-top: 1px solid var(--border);
            padding-top: 20px;
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .section-title h1, .section-title h2 { font-size: 1.8rem; }
        }
    </style>