:root { --primary: rgb(253,121,168); --primary-light: rgba(253,121,168, 0.1); --text-main: #1e293b; --text-muted: #64748b; --bg-body: #f8fafc; --bg-card: #ffffff; --border-color: #e2e8f0; --shadow-md: 0 4px 15px rgba(253,121,168, 0.15); }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: all 0.3s; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        .site-header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border-color); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
        .logo img { display: block; height: 36px; width: auto; max-width: 150px; object-fit: contain; flex-shrink: 0; }
        .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--text-main); white-space: nowrap; }
        .desktop-nav { display: flex; gap: 25px; }
        .desktop-nav a { font-size: 15px; font-weight: 500; color: var(--text-main); position: relative; padding: 5px 0; }
        .desktop-nav a:hover { color: var(--primary); }
        .desktop-nav a::after { content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 2px; background: var(--primary); transition: all 0.3s; transform: translateX(-50%); }
        .desktop-nav a:hover::after { width: 100%; }
        .mobile-btn { display: none; font-size: 24px; cursor: pointer; color: var(--text-main); background: none; border: none; }
        
        .drawer-mask { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 999; opacity: 0; visibility: hidden; transition: all 0.3s; }
        .drawer-mask.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: var(--bg-card); z-index: 1000; transition: all 0.3s; box-shadow: 2px 0 10px rgba(0,0,0,0.1); display: flex; flex-direction: column; }
        .drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; }
        .drawer-close { background: none; border: none; font-size: 24px; color: var(--text-muted); cursor: pointer; }
        .drawer-nav { padding: 20px; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 12px 0; font-size: 16px; font-weight: 500; border-bottom: 1px solid #f1f5f9; }

        
        .dl-hero { padding: 80px 0; background: #fff; overflow: hidden; }
        .dl-wrap { display: flex; align-items: center; gap: 60px; }
        .dl-content { flex: 1; }
        .dl-title { font-size: 42px; font-weight: 800; margin-bottom: 20px; color: #0f172a; line-height: 1.2; }
        .dl-title span { color: var(--primary); }
        .dl-desc { font-size: 18px; color: var(--text-muted); margin-bottom: 40px; }
        
        .dl-btns { display: flex; gap: 20px; margin-bottom: 30px; }
        .dl-btn { display: flex; align-items: center; gap: 10px; padding: 15px 30px; background: var(--bg-body); border: 1px solid var(--border-color); border-radius: 12px; font-weight: 600; cursor: pointer; transition: all 0.3s; }
        .dl-btn:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .dl-btn-icon { font-size: 24px; }
        
        .qr-box { display: flex; align-items: center; gap: 15px; padding: 20px; background: var(--bg-body); border-radius: 12px; display: inline-flex; }
        .qr-placeholder { width: 100px; height: 100px; background: #fff; border: 1px solid #ccc; display: flex; align-items: center; justify-content: center; font-size: 12px; color: #999; }
        .qr-text h5 { font-size: 16px; margin-bottom: 5px; color: var(--text-main); }
        .qr-text p { font-size: 13px; color: var(--text-muted); }

        .dl-visual { flex: 1; text-align: center; position: relative; }
        .dl-visual img { max-height: 600px; margin: 0 auto; filter: drop-shadow(0 20px 30px rgba(0,0,0,0.1)); }

        .dl-steps { padding: 60px 0; background: var(--bg-body); }
        .step-title { text-align: center; font-size: 30px; font-weight: 800; margin-bottom: 50px; }
        .step-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .step-card { background: #fff; padding: 40px 30px; border-radius: 16px; text-align: center; box-shadow: var(--shadow-sm); }
        .step-icon { width: 70px; height: 70px; background: var(--primary-light); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 30px; margin: 0 auto 20px; }
        .step-card h4 { font-size: 20px; margin-bottom: 15px; }
        .step-card p { color: var(--text-muted); font-size: 14px; }

        
        .site-footer { background: #0f172a; color: #e2e8f0; padding: 60px 0 20px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo span { color: #fff; }
        .footer-title { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 20px; }
        .footer-links li { margin-bottom: 12px; list-style: none; }
        .footer-links a { font-size: 14px; color: #cbd5e1; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; text-align: center; font-size: 13px; color: #64748b; }

        @media (max-width: 992px) { .dl-wrap { flex-direction: column; text-align: center; } .dl-btns { justify-content: center; } .step-cards { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 768px) { .desktop-nav { display: none; } .mobile-btn { display: block; } .step-cards, .footer-grid, .dl-btns { flex-direction: column; grid-template-columns: 1fr; } }