:root {
            --primary-color: rgb(12, 74, 110);
            --primary-hover: rgb(15, 118, 110);
            --bg-color: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --accent-color: #f43f5e;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--bg-color); color: var(--text-main); line-height: 1.6; }
        a { color: inherit; text-decoration: none; transition: color 0.3s; }
        a:hover { color: var(--primary-color); }
        
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        header { background: #fff; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
        .header-wrap { 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 { height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
        .logo span { font-size: 20px; font-weight: 800; color: var(--primary-color); white-space: nowrap; }
        
        .nav-desktop { display: flex; gap: 20px; align-items: center; }
        .nav-desktop a { font-weight: 500; font-size: 15px; color: var(--text-main); padding: 8px 12px; border-radius: 4px; }
        .nav-desktop a:hover { background-color: rgba(12, 74, 110, 0.05); color: var(--primary-color); }
        
        .menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-main); }
        
        
        .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 999; display: none; opacity: 0; transition: opacity 0.3s ease; }
        .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: #fff; z-index: 1000; transition: left 0.3s ease; display: flex; flex-direction: column; box-shadow: 2px 0 10px rgba(0,0,0,0.1); }
        .drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 20px; border-bottom: 1px solid var(--border-color); }
        .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; }
        .drawer-nav { display: flex; flex-direction: column; padding: 20px; gap: 15px; overflow-y: auto; }
        .drawer-nav a { font-size: 16px; font-weight: 500; padding: 10px; border-radius: 6px; }
        .drawer-nav a:hover { background: rgba(12,74,110,0.05); color: var(--primary-color); }
        .drawer.open { left: 0; }
        .drawer-overlay.open { display: block; opacity: 1; }

        
        .dl-hero { background: linear-gradient(135deg, var(--primary-color), #0f766e); color: white; padding: 60px 0; text-align: center; }
        .dl-hero h1 { font-size: 30px; font-weight: 800; margin-bottom: 10px; }
        .dl-hero p { font-size: 15px; opacity: 0.9; max-width: 600px; margin: 0 auto; }

        .dl-content { max-width: 900px; margin: 40px auto 60px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; }
        .dl-card { background: #fff; border: 1px solid var(--border-color); border-radius: 8px; padding: 30px; display: flex; flex-direction: column; justify-content: space-between; }
        .dl-card h2 { font-size: 22px; font-weight: 700; color: var(--primary-color); margin-bottom: 15px; }
        .dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; line-height: 1.6; }
        
        .dl-buttons { display: flex; flex-direction: column; gap: 12px; }
        .dl-btn { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 12px; border-radius: 6px; font-weight: 600; text-align: center; cursor: pointer; }
        .dl-btn-primary { background: var(--primary-color); color: white; }
        .dl-btn-primary:hover { background: var(--primary-hover); }
        .dl-btn-secondary { background: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-main); }
        .dl-btn-secondary:hover { background: #e2e8f0; }

        .app-features { display: flex; flex-direction: column; gap: 15px; }
        .feature-item { display: flex; align-items: flex-start; gap: 10px; }
        .feature-icon { background: rgba(12,74,110,0.1); color: var(--primary-color); width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }
        .feature-text h4 { font-size: 14px; font-weight: 700; }
        .feature-text p { font-size: 12px; color: var(--text-muted); }

        .dl-faq { background: #fff; border: 1px solid var(--border-color); border-radius: 8px; padding: 30px; margin-bottom: 60px; }
        .dl-faq h3 { font-size: 18px; font-weight: 700; margin-bottom: 20px; color: var(--primary-color); border-left: 4px solid var(--primary-color); padding-left: 10px; }
        .faq-item { margin-bottom: 15px; padding-bottom: 15px; border-bottom: 1px dashed var(--border-color); }
        .faq-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
        .faq-q { font-weight: 700; font-size: 14px; margin-bottom: 6px; color: var(--text-main); }
        .faq-a { font-size: 13px; color: var(--text-muted); }

        
        footer { background: #0f172a; color: #94a3b8; padding: 50px 0 20px; border-top: 4px solid var(--primary-color); font-size: 14px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo { margin-bottom: 15px; }
        .footer-logo span { color: #fff; }
        .footer-desc { line-height: 1.7; margin-bottom: 15px; font-size: 13px; }
        .footer-title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; }
        .footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: #94a3b8; }
        .footer-links a:hover { color: #fff; }
        .friend-links { border-top: 1px solid #334155; padding-top: 20px; margin-bottom: 20px; }
        .friend-title { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: 10px; }
        .friend-content { display: flex; flex-wrap: wrap; gap: 15px; }
        .friend-content a { color: #94a3b8; font-size: 13px; }
        .friend-content a:hover { color: #fff; }
        .footer-bottom { border-top: 1px solid #334155; padding-top: 20px; text-align: center; font-size: 12px; color: #64748b; }
        
        
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .menu-btn { display: block; }
            .dl-content { grid-template-columns: 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
        }