<style>
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif; background: #f0f8ff; color: #1a2a3a; line-height: 1.6; }
        a { text-decoration: none; color: #2B6FDF; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        .header { background: linear-gradient(135deg, #1a4f9e 0%, #2B6FDF 100%); padding: 16px 0; position: sticky; top: 0; z-index: 100; }
        .header .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
        .logo { display: flex; align-items: center; gap: 12px; }
        .logo-icon { width: 40px; height: 40px; background: white; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; color: #2B6FDF; }
        .logo h1 { font-size: 24px; font-weight: 700; color: white; }
        .logo span { font-size: 14px; color: rgba(255,255,255,0.8); }
        .nav { display: flex; gap: 32px; }
        .nav a { color: white; font-weight: 500; padding: 8px 0; border-bottom: 2px solid transparent; }
        .nav a:hover, .nav a.active { border-bottom-color: white; }
        .btn-primary { background: linear-gradient(135deg, #FF8C00, #FF6B00); color: white; padding: 14px 32px; border-radius: 40px; font-weight: 600; border: none; cursor: pointer; display: inline-block; transition: transform 0.2s; }
        .btn-primary:hover { transform: translateY(-2px); color: white; }
        .btn-secondary { background: transparent; border: 2px solid #2B6FDF; color: #2B6FDF; padding: 10px 28px; border-radius: 40px; font-weight: 600; display: inline-block; }
        .btn-secondary:hover { background: #2B6FDF; color: white; }
        .section { padding: 60px 0; }
        .section-title { font-size: 36px; font-weight: 700; text-align: center; margin-bottom: 16px; color: #1a2a3a; }
        .section-sub { text-align: center; color: #6a7a8a; margin-bottom: 48px; font-size: 18px; }
        .download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 32px; margin-bottom: 60px; }
        .download-card { background: white; border-radius: 24px; padding: 32px; text-align: center; box-shadow: 0 8px 24px rgba(0,0,0,0.08); transition: transform 0.2s; }
        .download-card:hover { transform: translateY(-4px); }
        .download-card .icon { font-size: 64px; margin-bottom: 16px; }
        .download-card h3 { font-size: 24px; margin-bottom: 8px; }
        .download-card .version { color: #2B6FDF; font-weight: 600; margin-bottom: 8px; }
        .download-card .size { color: #8a9aaa; font-size: 14px; margin-bottom: 20px; }
        .download-card .system { background: #eef4fa; padding: 6px 12px; border-radius: 20px; font-size: 13px; margin-bottom: 24px; display: inline-block; }
        .btn-download { background: #2B6FDF; color: white; padding: 12px 24px; border-radius: 40px; font-weight: 600; display: inline-block; margin-top: 8px; }
        .btn-download:hover { background: #1a4f9e; color: white; }
        .nav-links { display: flex; gap: 24px; justify-content: center; margin: 40px 0; flex-wrap: wrap; }
        .faq-list { max-width: 900px; margin: 0 auto; }
        .faq-item { background: white; border-radius: 16px; margin-bottom: 16px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
        .faq-question { padding: 20px 24px; font-weight: 600; font-size: 18px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; background: white; }
        .faq-question .num { color: #2B6FDF; margin-right: 16px; font-weight: 700; }
        .faq-question .arrow { font-size: 20px; transition: transform 0.2s; }
        .faq-item.active .faq-question .arrow { transform: rotate(180deg); }
        .faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s; background: #fafcff; border-top: 1px solid #eef2f8; color: #5a6a7a; }
        .faq-item.active .faq-answer { padding: 20px 24px; max-height: 300px; }
        .footer { background: #1a2a3a; color: #aab4c0; padding: 60px 0 30px; }
        .footer .container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; }
        .keywords { margin-top: 40px; padding-top: 30px; border-top: 1px solid #2a3a4a; text-align: center; font-size: 13px; }
        @media (max-width: 768px) {
            .header .container { flex-direction: column; gap: 16px; }
            .nav { gap: 24px; }
            .footer .container { grid-template-columns: 1fr; gap: 32px; }
        }
    </style>