:root { --primary: rgb(66,133,244); --primary-hover: #3367d6; --primary-light: rgba(66,133,244,0.08); --text-main: #1a1f36; --text-muted: #697386; --bg-body: #f7f9fc; --bg-surface: #ffffff; --border-color: #e3e8ee; --radius-md: 8px; --radius-lg: 16px; --container-width: 1240px; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, sans-serif; background-color: #fff; 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; }
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; font-size: 16px; font-weight: 600; border-radius: 30px; cursor: pointer; border: 1px solid transparent; transition: 0.3s; }
        .btn-primary { background-color: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(66,133,244,0.3); }
        .btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-2px); }

        
        .site-header { background: #fff; 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: 72px; }
        .logo { display: inline-flex; align-items: center; gap: 10px; }
        .logo img { display: block; height: 36px; width: auto; max-width: 160px; object-fit: contain; }
        .logo span { font-size: 20px; font-weight: 800; color: var(--text-main); }
        .desktop-nav { flex: 1; margin: 0 40px; display: flex; justify-content: flex-end; }
        .desktop-nav ul { display: flex; gap: 30px; }
        .desktop-nav a { font-size: 15px; font-weight: 500; color: var(--text-muted); }
        .desktop-nav a:hover { color: var(--primary); }
        .mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 5px; }

        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; visibility: hidden; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: #fff; z-index: 999; transition: transform 0.3s; display: flex; flex-direction: column; }
        .drawer.active { transform: translateX(300px); }
        .drawer-header { padding: 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border-color); }
        .drawer-close { background: none; border: none; cursor: pointer; padding: 5px; }
        .drawer-body { flex: 1; overflow-y: auto; padding: 20px 0; }
        .drawer-nav li a { display: block; padding: 12px 20px; font-size: 16px; }

        
        .dl-hero { padding: 100px 0; background: linear-gradient(135deg, #f8faff 0%, #eef3ff 100%); overflow: hidden; }
        .dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
        .dl-content h1 { font-size: 48px; margin-bottom: 20px; color: #111; letter-spacing: -1px; }
        .dl-content p { font-size: 18px; color: var(--text-muted); margin-bottom: 40px; line-height: 1.8; }
        .dl-actions { display: flex; gap: 20px; margin-bottom: 40px; }
        .dl-qr { display: flex; align-items: center; gap: 20px; background: #fff; padding: 20px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); display: inline-flex; }
        .dl-qr img { width: 100px; height: 100px; border: 1px solid var(--border-color); border-radius: 8px; }
        .dl-qr-text p { margin-bottom: 5px; font-weight: 600; }
        .dl-qr-text span { font-size: 13px; color: var(--text-muted); }
        .dl-visual { position: relative; }
        .dl-visual img { width: 100%; max-width: 400px; margin: 0 auto; border-radius: 30px; box-shadow: 0 30px 60px rgba(66,133,244,0.2); }

        
        .dl-steps { padding: 80px 0; background: #fff; }
        .steps-title { text-align: center; font-size: 32px; margin-bottom: 50px; }
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; text-align: center; }
        .step-item .step-num { width: 60px; height: 60px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; margin: 0 auto 20px; box-shadow: 0 10px 20px rgba(66,133,244,0.3); }
        .step-item h3 { font-size: 20px; margin-bottom: 12px; }
        .step-item p { color: var(--text-muted); }

        
        .site-footer { background: #1a1d20; color: #9ca3af; padding: 60px 0 20px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo span { color: #fff; }
        .footer-desc { margin-top: 16px; font-size: 14px; }
        .footer-title { color: #fff; font-size: 16px; margin-bottom: 20px; }
        .footer-links ul { display: flex; flex-direction: column; gap: 12px; }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); }

        @media (max-width: 992px) {
            .dl-grid { grid-template-columns: 1fr; text-align: center; gap: 40px; }
            .dl-actions { justify-content: center; }
            .dl-qr { margin: 0 auto; }
            .steps-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-toggle { display: block; }
            .footer-grid { grid-template-columns: 1fr; }
        }