:root { --primary: rgb(30,64,175); --primary-hover: rgb(25, 54, 150); --bg-body: #f4f6f9; --bg-white: #ffffff; --text-dark: #1a1a1a; --text-gray: #666666; --text-light: #999999; --border-color: #e5e7eb; --shadow: 0 4px 12px rgba(0,0,0,0.05); }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, sans-serif; background-color: var(--bg-body); color: var(--text-dark); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: color 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        .header { background: var(--bg-white); box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
        .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--text-dark); white-space: nowrap; }
        .nav-desktop { display: flex; gap: 30px; align-items: center; }
        .nav-desktop a { font-size: 16px; font-weight: 500; color: var(--text-dark); }
        .nav-desktop a:hover { color: var(--primary); }
        .menu-btn { display: none; font-size: 24px; cursor: pointer; background: none; border: none; }
        .btn { display: inline-block; padding: 10px 20px; background: var(--primary); color: #fff; border-radius: 6px; font-weight: 600; text-align: center; }
        
        .drawer-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; transition: opacity 0.3s; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: var(--bg-white); z-index: 999; transition: left 0.3s ease; box-shadow: 2px 0 10px rgba(0,0,0,0.1); overflow-y: auto; }
        .drawer.active { left: 0; }
        .drawer-overlay.active { display: block; opacity: 1; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { font-size: 24px; cursor: pointer; background: none; border: none; color: var(--text-gray); }
        .drawer-nav { padding: 20px; display: flex; flex-direction: column; gap: 15px; }
        .drawer-nav a { display: block; font-size: 16px; font-weight: 500; padding: 10px 0; border-bottom: 1px dashed var(--border-color); }
        
        .footer { background: #111827; color: #9ca3af; padding: 60px 0 20px; margin-top: 60px;}
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo { margin-bottom: 20px; }
        .footer-logo .logo span { color: #fff; }
        .footer-desc { font-size: 14px; line-height: 1.8; margin-bottom: 20px; max-width: 300px; }
        .footer-title { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { font-size: 14px; }
        .footer-links a:hover { color: #fff; text-decoration: underline; }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #374151; font-size: 13px; }
        @media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 768px) { .nav-desktop { display: none; } .menu-btn { display: block; } .footer-grid { grid-template-columns: 1fr; } }

        
        .dl-hero { background: var(--primary); padding: 80px 0; color: #fff; overflow: hidden; }
        .dl-container { display: flex; align-items: center; justify-content: space-between; gap: 60px; }
        .dl-content { flex: 1; max-width: 500px; }
        .dl-title { font-size: 40px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
        .dl-subtitle { font-size: 18px; opacity: 0.9; margin-bottom: 40px; }
        .dl-buttons { display: flex; gap: 20px; flex-wrap: wrap; }
        .dl-btn { background: #fff; color: var(--primary); padding: 15px 30px; border-radius: 8px; font-size: 18px; font-weight: bold; display: flex; align-items: center; gap: 10px; transition: transform 0.3s; }
        .dl-btn:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); color: var(--primary); }
        .dl-qr { background: #fff; padding: 15px; border-radius: 8px; text-align: center; color: var(--text-dark); font-size: 14px; margin-top: 30px; display: inline-block; }
        .dl-qr img { width: 120px; height: 120px; background: #eee; margin-bottom: 10px; }
        
        .dl-mockup { flex: 1; display: flex; justify-content: center; position: relative; }
        .phone-frame { width: 300px; height: 600px; border: 12px solid #222; border-radius: 40px; background: #fff; overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.3); position: relative; }
        .phone-frame::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 120px; height: 25px; background: #222; border-bottom-left-radius: 15px; border-bottom-right-radius: 15px; z-index: 2; }
        .phone-ui { width: 100%; height: 100%; background: url('https://placehold.co/300x600/f4f6f9/1e40af?text=App+Interface') center/cover; }

        .dl-steps { padding: 80px 0; background: var(--bg-white); }
        .steps-title { text-align: center; font-size: 30px; margin-bottom: 50px; font-weight: 700; }
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; text-align: center; }
        .step-item { padding: 30px; }
        .step-icon { width: 80px; height: 80px; background: var(--bg-body); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 30px; margin: 0 auto 20px; color: var(--primary); border: 2px dashed var(--primary); }
        
        @media (max-width: 768px) {
            .dl-container { flex-direction: column; text-align: center; }
            .dl-content { max-width: 100%; }
            .dl-buttons { justify-content: center; }
            .steps-grid { grid-template-columns: 1fr; }
        }