:root {
            --primary: rgb(8,145,178);
            --primary-hover: #067793;
            --primary-light: rgba(8,145,178,0.1);
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --bg-body: #f9fafb;
            --bg-white: #ffffff;
            --border: #e5e7eb;
            --shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        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); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; 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-main); white-space: nowrap; }
        .desktop-nav { display: flex; gap: 24px; align-items: center; }
        .desktop-nav a { font-size: 16px; font-weight: 500; color: var(--text-main); padding: 8px 12px; border-radius: 6px; }
        .desktop-nav a:hover { color: var(--primary); background: var(--primary-light); }
        .mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; color: var(--text-main); }
        
        .mobile-drawer { position: fixed; inset: 0; z-index: 999; pointer-events: none; }
        .drawer-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.5); opacity: 0; transition: opacity 0.3s; }
        .drawer-content { position: absolute; top: 0; bottom: 0; left: -300px; width: 280px; background: var(--bg-white); transition: transform 0.3s ease; display: flex; flex-direction: column; }
        .mobile-drawer.active { pointer-events: auto; }
        .mobile-drawer.active .drawer-overlay { opacity: 1; }
        .mobile-drawer.active .drawer-content { transform: translateX(300px); }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { background: none; border: none; cursor: pointer; color: var(--text-muted); }
        .drawer-nav { padding: 20px; display: flex; flex-direction: column; gap: 15px; }
        .drawer-nav a { display: block; font-size: 16px; padding: 10px 15px; border-radius: 8px; font-weight: 500; }
        .drawer-nav a:hover { background: var(--primary-light); color: var(--primary); }

        .dl-hero { padding: 80px 0; background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-body) 100%); }
        .dl-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
        .dl-content { flex: 1; max-width: 500px; }
        .dl-content h1 { font-size: 40px; margin-bottom: 20px; color: var(--text-main); line-height: 1.2; }
        .dl-content p { font-size: 18px; color: var(--text-muted); margin-bottom: 40px; }
        
        .dl-box { background: var(--bg-white); padding: 30px; border-radius: 16px; box-shadow: var(--shadow); display: inline-flex; align-items: center; gap: 30px; border: 1px solid var(--border); }
        .qr-code { width: 140px; height: 140px; background: #fff; padding: 10px; border: 1px solid var(--border); border-radius: 8px; }
        .dl-btns { display: flex; flex-direction: column; gap: 15px; }
        .dl-btn { display: flex; align-items: center; gap: 10px; background: var(--text-main); color: #fff; padding: 12px 24px; border-radius: 8px; font-weight: bold; width: 200px; justify-content: center; }
        .dl-btn:hover { background: #000; }
        .dl-btn.android { background: var(--primary); }
        .dl-btn.android:hover { background: var(--primary-hover); }

        .dl-visual { flex: 1; text-align: right; }
        .dl-visual img { max-width: 400px; display: inline-block; animation: float 4s ease-in-out infinite; }
        @keyframes float { 0% { transform: translateY(0); } 50% { transform: translateY(-15px); } 100% { transform: translateY(0); } }

        .steps-section { padding: 80px 0; background: var(--bg-white); }
        .section-title { text-align: center; font-size: 32px; margin-bottom: 50px; }
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .step-card { text-align: center; padding: 40px 20px; border: 1px solid var(--border); border-radius: 12px; position: relative; }
        .step-num { position: absolute; top: -20px; left: 50%; transform: translateX(-50%); width: 40px; height: 40px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: bold; border: 4px solid var(--bg-white); }
        .step-card h3 { font-size: 20px; margin-top: 10px; margin-bottom: 15px; }
        .step-card p { color: var(--text-muted); font-size: 14px; }

        .footer { background: #111827; color: #9ca3af; padding: 60px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo span { color: #fff; }
        .footer-desc { margin-top: 15px; font-size: 14px; line-height: 1.8; }
        .footer-title { color: #fff; font-size: 18px; font-weight: 600; margin-bottom: 20px; }
        .footer-links ul li { margin-bottom: 12px; }
        .footer-links ul li a:hover { color: var(--primary); }
        .footer-contact p { margin-bottom: 10px; font-size: 14px; }
        .footer-bottom { border-top: 1px solid #374151; padding: 20px 0; text-align: center; font-size: 14px; }

        @media (max-width: 992px) {
            .dl-inner { flex-direction: column; text-align: center; }
            .dl-content { max-width: 100%; }
            .dl-box { flex-direction: column; align-items: center; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-menu-btn { display: block; }
            .footer-grid { grid-template-columns: 1fr; }
        }