<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', 'PingFang SC', Roboto, sans-serif;
            background: #f5f9ff;
            color: #1e2a3e;
            line-height: 1.5;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .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;
        }
        .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;
            font-size: 18px;
            transition: 0.2s;
        }
        .nav-links a:hover { color: #0070f3; }
        .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;
            font-size: 16px;
        }
        .btn:hover { background: #005fcc; transform: translateY(-2px); }
        .card-download {
            background: white;
            border-radius: 28px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 12px 24px rgba(0,0,0,0.05);
            transition: 0.2s;
        }
        .grid-download {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 32px;
            margin: 40px 0;
        }
        .faq-item {
            background: white;
            margin-bottom: 16px;
            border-radius: 20px;
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            background: #f8fafd;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid #eef2f8;
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: white;
        }
        .faq-answer.show { padding: 20px 24px; max-height: 400px; }
        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; background: rgba(255,255,255,0.08); padding: 6px 14px; border-radius: 30px; text-decoration: none; font-size: 14px; }
        .nav-card { background: #eef3fc; border-radius: 24px; padding: 30px; text-align: center; margin: 40px 0; }
        @media (max-width: 768px) { .navbar { flex-direction: column; gap: 16px; } .grid-download { gap: 20px; } }
    </style>