:root { --primary: rgb(24, 119, 242); --primary-dark: rgb(18, 90, 184); --text-main: #1a1a1a; --text-sub: #666666; --bg-body: #f4f7f6; --border-color: #eaeaea; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, sans-serif; background: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }
        
        
        .header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); position: fixed; top: 0; left: 0; right: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
        .header-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 70px; padding: 0 20px; }
        .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: 22px; font-weight: 800; color: var(--primary); white-space: nowrap; }
        .nav-desktop { display: flex; gap: 30px; align-items: center; }
        .nav-desktop a { font-size: 16px; font-weight: 500; }
        .menu-toggle { display: none; font-size: 24px; cursor: pointer; }
        
        
        .mobile-mask { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1001; opacity: 0; visibility: hidden; }
        .mobile-mask.active { opacity: 1; visibility: visible; }
        .mobile-drawer { position: fixed; top: 0; left: -300px; bottom: 0; width: 280px; background: #fff; z-index: 1002; transition: left 0.3s; display: flex; flex-direction: column; }
        .mobile-drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; }
        .drawer-close { font-size: 24px; cursor: pointer; }
        .drawer-nav { padding: 20px; flex: 1; overflow-y: auto; }
        .drawer-nav a { display: block; padding: 15px 0; border-bottom: 1px dashed var(--border-color); }

        
        .dl-hero { margin-top: 70px; background: linear-gradient(135deg, #001529 0%, var(--primary-dark) 100%); color: #fff; padding: 100px 20px; overflow: hidden; position: relative; }
        .dl-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 60px; position: relative; z-index: 2; }
        .dl-text { flex: 1; }
        .dl-text h1 { font-size: 48px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
        .dl-text p { font-size: 18px; opacity: 0.9; margin-bottom: 40px; line-height: 1.8; }
        
        .dl-actions { display: flex; gap: 30px; align-items: center; }
        .qr-box { background: #fff; padding: 15px; border-radius: 12px; text-align: center; color: var(--text-main); }
        .qr-box img { width: 120px; height: 120px; background: #eee; margin-bottom: 10px; }
        .qr-box span { font-size: 14px; font-weight: 600; }
        
        .btn-group { display: flex; flex-direction: column; gap: 15px; }
        .dl-btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.3); color: #fff; padding: 15px 30px; border-radius: 30px; font-size: 18px; font-weight: bold; min-width: 200px; transition: 0.3s; }
        .dl-btn:hover { background: #fff; color: var(--primary); border-color: #fff; }
        .dl-btn.android:hover { color: #3ddc84; }

        .dl-visual { flex: 1; display: flex; justify-content: center; position: relative; }
        .dl-visual img { max-width: 320px; animation: floatUp 4s ease-in-out infinite; }
        @keyframes floatUp { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }

        
        .steps-section { padding: 80px 20px; background: #fff; }
        .steps-title { text-align: center; margin-bottom: 50px; font-size: 32px; font-weight: 800; }
        .steps-grid { max-width: 1000px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; position: relative; }
        .step-card { text-align: center; padding: 30px; position: relative; z-index: 2; background: #fff; }
        .step-num { width: 60px; height: 60px; background: var(--primary); color: #fff; font-size: 24px; font-weight: bold; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; box-shadow: 0 10px 20px rgba(24,119,242,0.3); }
        .step-card h3 { font-size: 20px; margin-bottom: 10px; }
        .step-card p { font-size: 14px; color: var(--text-sub); }

        
        .footer { background: #001529; color: #a0aec0; padding: 60px 20px 20px; }
        .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
        .footer-brand .logo span { color: #fff; }
        .footer-title { color: #fff; margin-bottom: 20px; font-size: 18px; }
        .footer-links li { margin-bottom: 12px; }
        .footer-bottom { max-width: 1200px; margin: 40px auto 0; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; display: flex; justify-content: space-between; font-size: 13px; }
        .footer-bottom-links { display: flex; gap: 15px; }

        @media (max-width: 992px) {
            .nav-desktop { display: none; }
            .menu-toggle { display: block; }
            .dl-container { flex-direction: column; text-align: center; }
            .dl-actions { justify-content: center; flex-wrap: wrap; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .dl-text h1 { font-size: 36px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; gap:10px; }
        }