<style>
        :root {
            --bg-warm: #f9f7f3;
            --bg-white: #ffffff;
            --bg-deep: #1b1e2f;
            --bg-deep2: #23273a;
            --gold: #c8a55e;
            --gold-light: #dcc08a;
            --gold-dark: #a8853d;
            --text-dark: #2c2c2c;
            --text-mid: #5a5a5a;
            --text-light: #7a7a7a;
            --text-on-dark: #e8e6e0;
            --border-soft: #e5e0d8;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-heading: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            --font-body: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body { font-family: var(--font-body); background-color: var(--bg-warm); color: var(--text-dark); line-height: 1.7; -webkit-font-smoothing: antialiased; letter-spacing: 0.02em; }
        .site-header { background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-soft); position: sticky; top: 0; z-index: 1000; box-shadow: var(--shadow-sm); }
        .header-inner { max-width: 1280px; margin: 0 auto; padding: 0 28px; display: flex; align-items: center; justify-content: space-between; height: 66px; }
        .logo-area { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text-dark); }
        .logo-icon { width: 42px; height: 42px; background: linear-gradient(135deg, #1b1e2f 0%, #2a2f4a 100%); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 8px rgba(27,30,47,0.2); }
        .logo-icon svg { width: 24px; height: 24px; }
        .logo-text { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: #1b1e2f; }
        .logo-text span { color: var(--gold-dark); }
        .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
        .nav-links a { text-decoration: none; color: var(--text-mid); font-weight: 500; font-size: 0.95rem; transition: var(--transition); position: relative; padding: 4px 0; }
        .nav-links a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--gold); border-radius: 2px; transition: var(--transition); }
        .nav-links a:hover, .nav-links a.active { color: #1b1e2f; }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .btn-nav-download { background: linear-gradient(135deg, #1b1e2f 0%, #2a2f4a 100%); color: #fff !important; padding: 10px 22px !important; border-radius: 24px; font-weight: 600 !important; font-size: 0.9rem !important; box-shadow: 0 3px 12px rgba(27,30,47,0.25); white-space: nowrap; }
        .btn-nav-download:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(27,30,47,0.35); }
        .btn-nav-download::after { display: none !important; }
        .mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; }
        .mobile-menu-toggle span { display: block; width: 26px; height: 2.5px; background: #1b1e2f; border-radius: 3px; transition: var(--transition); }
        .site-footer { background: #1b1e2f; color: var(--text-on-dark); padding: 56px 0 28px; margin-top: 60px; }
        .footer-inner { max-width: 1280px; margin: 0 auto; padding: 0 28px; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
        .footer-col h4 { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 600; margin-bottom: 18px; color: #ffffff; }
        .footer-col p, .footer-col a { color: #bfbbb2; font-size: 0.9rem; line-height: 2; text-decoration: none; transition: var(--transition); display: block; }
        .footer-col a:hover { color: var(--gold-light); }
        .footer-bottom { max-width: 1280px; margin: 32px auto 0; padding: 20px 28px 0; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 0.85rem; color: #8a8780; }
        .footer-logo-sm { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
        .footer-logo-sm .logo-icon { width: 34px; height: 34px; border-radius: 6px; }
        .footer-logo-sm span { font-weight: 700; font-size: 1.2rem; color: #fff; }
        .section-container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
        .section-padding { padding: 64px 0; }
        .section-padding-lg { padding: 80px 0; }
        .section-title { font-family: var(--font-heading); font-size: 2.4rem; font-weight: 700; color: #1b1e2f; margin-bottom: 14px; line-height: 1.3; }
        .section-subtitle { font-size: 1.1rem; color: var(--text-mid); max-width: 680px; line-height: 1.7; }
        .text-center { text-align: center; }
        .mx-auto { margin-left: auto; margin-right: auto; }
        .btn { display: inline-block; padding: 14px 32px; border-radius: 28px; font-weight: 600; font-size: 1rem; text-decoration: none; cursor: pointer; transition: var(--transition); border: none; font-family: var(--font-body); letter-spacing: 0.03em; }
        .btn-primary { background: linear-gradient(135deg, #1b1e2f 0%, #2a2f4a 100%); color: #fff; box-shadow: 0 4px 16px rgba(27,30,47,0.3); }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(27,30,47,0.4); }
        .btn-gold { background: linear-gradient(135deg, #c8a55e 0%, #dcc08a 100%); color: #1b1e2f; box-shadow: 0 4px 16px rgba(200,165,94,0.3); }
        .btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(200,165,94,0.45); }
        .download-hero { background: linear-gradient(170deg, #f9f7f3 0%, #f0ede6 100%); padding: 60px 0 50px; text-align: center; }
        .platform-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
        .platform-card { background: #fff; border-radius: var(--radius-lg); padding: 32px 22px; text-align: center; box-shadow: var(--shadow-md); border: 1px solid var(--border-soft); transition: var(--transition); position: relative; overflow: hidden; }
        .platform-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .platform-icon { width: 72px; height: 72px; background: #f7f5f0; border-radius: 50%; margin: 0 auto 18px; display: flex; align-items: center; justify-content: center; font-size: 2rem; }
        .platform-card h3 { font-family: var(--font-heading); font-weight: 600; color: #1b1e2f; margin-bottom: 6px; font-size: 1.25rem; }
        .platform-card .ver { font-size: 0.85rem; color: var(--text-light); margin-bottom: 16px; }
        .platform-card .btn { width: 100%; }
        .info-row { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 48px; }
        .info-card { background: #fff; border-radius: var(--radius-lg); padding: 32px; border: 1px solid var(--border-soft); box-shadow: var(--shadow-sm); }
        .info-card h3 { font-family: var(--font-heading); font-weight: 600; color: #1b1e2f; margin-bottom: 16px; font-size: 1.3rem; }
        .info-card ul { list-style: none; padding: 0; }
        .info-card li { padding: 8px 0; color: var(--text-mid); font-size: 0.95rem; display: flex; align-items: flex-start; gap: 8px; border-bottom: 1px solid var(--border-soft); }
        .info-card li:last-child { border-bottom: none; }
        .info-card li::before { content: '✓'; color: var(--gold-dark); font-weight: 700; flex-shrink: 0; }
        @media (max-width: 1024px) {
            .platform-grid { grid-template-columns: repeat(2,1fr); }
            .info-row { grid-template-columns: 1fr; }
            .footer-inner { grid-template-columns: repeat(2,1fr); }
            .section-title { font-size: 1.9rem; }
        }
        @media (max-width: 640px) {
            .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; gap: 14px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border-soft); }
            .nav-links.open { display: flex; }
            .mobile-menu-toggle { display: flex; }
            .platform-grid { grid-template-columns: 1fr; }
            .footer-inner { grid-template-columns: 1fr; gap: 24px; }
            .section-title { font-size: 1.6rem; }
            .info-row { gap: 20px; }
        }
    </style>