<style>
        :root {
            --primary: #1e6fff;
            --primary-dark: #1557c2;
            --primary-light: #eef3ff;
            --bg: #f8faff;
            --surface: #ffffff;
            --text: #1a2332;
            --text-secondary: #4a5b6e;
            --text-muted: #6b7a8d;
            --border: #e8edf5;
            --border-light: #f0f3f9;
            --shadow-xs: 0 1px 4px rgba(0,0,0,0.03);
            --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);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.10);
            --radius-xs: 8px;
            --radius-sm: 12px;
            --radius: 16px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: 0.15s 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;
            -moz-osx-font-smoothing: grayscale;
        }
        a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ========== 头部导航 ========== */
        header {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border-bottom: 1px solid var(--border-light);
            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: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text);
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #1e6fff 0%, #3a8cff 100%);
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.15rem;
            box-shadow: 0 4px 14px rgba(30,111,255,0.28);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 30px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .nav-links li a {
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition-fast);
        }
        .nav-links li a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 11px 24px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 16px rgba(30,111,255,0.32);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(30,111,255,0.42);
        }
        .btn-outline {
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 11px 26px;
            border-radius: 30px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1.05rem;
            border-radius: 34px;
        }
        .btn-sm {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: 24px;
            font-size: 0.88rem;
            font-weight: 600;
            transition: var(--transition-fast);
        }
        .btn-sm:hover { background: var(--primary-dark); transform: scale(1.04); }

        /* ========== 通用版块 ========== */
        section { padding: 72px 0; }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header h1, .section-header h2 {
            font-size: 2.25rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            color: var(--text);
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        /* ========== 版本下载卡片网格 ========== */
        .version-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
            margin-top: 36px;
        }
        .version-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 38px 24px 32px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .version-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: #cfdefa;
        }
        .version-icon {
            font-size: 3.2rem;
            margin-bottom: 18px;
        }
        .version-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .version-meta {
            color: var(--text-secondary);
            font-size: 0.88rem;
            margin-bottom: 4px;
        }
        .version-card .btn-sm {
            margin-top: 20px;
        }

        /* ========== FAQ 折叠 ========== */
        .faq-container { max-width: 820px; margin: 0 auto; }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 8px;
            overflow: hidden;
            transition: var(--transition-fast);
        }
        .faq-item:hover { border-color: #cfdefa; }
        .faq-question {
            padding: 17px 22px;
            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;
            color: var(--text);
            gap: 14px;
        }
        .faq-question .arrow {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform 0.25s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .arrow { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-secondary);
            display: none;
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ========== CTA 区域 ========== */
        .cta-section {
            background: linear-gradient(135deg, #eef3ff 0%, #e0ebff 100%);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            text-align: center;
        }
        .cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 10px; }
        .cta-section p { color: var(--text-secondary); margin-bottom: 24px; font-size: 1.05rem; }

        /* ========== 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-lg);
            padding: 32px 24px;
            flex: 1 1 200px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: var(--transition);
        }
        .step:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .step-num {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary) 0%, #3a8cff 100%);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 16px;
            box-shadow: 0 6px 18px rgba(30,111,255,0.25);
        }
        .step h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
        .step p { color: var(--text-secondary); font-size: 0.88rem; }

        /* ========== 快捷导航卡片 ========== */
        .nav-cards {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .nav-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            flex: 1 1 240px;
            transition: var(--transition);
        }
        .nav-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: #cfdefa;
        }
        .nav-card-icon { font-size: 2.4rem; margin-bottom: 14px; }
        .nav-card h4 { font-weight: 700; margin-bottom: 6px; }
        .nav-card p { color: var(--text-secondary); font-size: 0.88rem; margin-bottom: 16px; }

        /* ========== 底部 ========== */
        footer {
            background: #fff;
            border-top: 1px solid var(--border-light);
            padding: 52px 0 36px;
            color: var(--text-secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-col h4 {
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
            font-size: 0.95rem;
        }
        .footer-col li { margin-bottom: 10px; font-size: 0.88rem; }
        .footer-col a:hover { color: var(--primary); }
        .footer-bottom {
            text-align: center;
            font-size: 0.82rem;
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            color: var(--text-muted);
        }

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