:root { --primary-color: rgb(15,118,110); --primary-hover: rgb(13,100,93); --primary-light: rgba(15,118,110,0.05); --text-main: #1f2937; --text-muted: #6b7280; --bg-body: #f9fafb; --bg-card: #ffffff; --border-color: #e5e7eb; --header-h: 72px; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; color: var(--text-main); background: #fff; line-height: 1.6; }
        a { color: inherit; text-decoration: none; transition: 0.3s; }
        img { max-width: 100%; display: block; }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 8px; font-weight: 600; cursor: pointer; transition: all 0.3s; font-size: 16px; }
        .btn-primary { background: var(--primary-color); color: #fff; box-shadow: 0 4px 15px rgba(15,118,110,0.3); }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(15,118,110,0.4); }
        .btn-outline { border: 2px solid var(--border-color); background:#fff; }
        .btn-outline:hover { border-color: var(--primary-color); color: var(--primary-color); }
        
        
        .header { position: sticky; top: 0; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); box-shadow: 0 1px 3px rgba(0,0,0,0.05); z-index: 100; height: var(--header-h); }
        .header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
        .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; }
        .logo span { font-size: 20px; font-weight: 800; color: var(--primary-color); white-space: nowrap; }
        .desktop-nav { display: flex; gap: 30px; }
        .desktop-nav a { font-size: 16px; font-weight: 500; position: relative; padding: 5px 0; }
        .desktop-nav a:hover { color: var(--primary-color); }
        .header-actions { display: flex; gap: 15px; }
        .menu-toggle { display: none; font-size: 24px; cursor: pointer; }
        
        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999; opacity: 0; visibility: hidden; transition: 0.3s; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: #fff; z-index: 1000; transition: 0.3s; display: flex; flex-direction: column; }
        .drawer-active .drawer-overlay { opacity: 1; visibility: visible; }
        .drawer-active .drawer { 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; color: var(--text-muted); }
        .drawer-nav { padding: 20px; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 12px 0; border-bottom: 1px dashed var(--border-color); }

        
        .dl-hero { padding: 80px 0; background: linear-gradient(180deg, var(--bg-body) 0%, #fff 100%); overflow: hidden; }
        .dl-layout { display: flex; align-items: center; justify-content: space-between; gap: 60px; }
        .dl-content { flex: 1; max-width: 600px; }
        .dl-title { font-size: 46px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
        .dl-desc { font-size: 18px; color: var(--text-muted); margin-bottom: 40px; }
        .dl-actions { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 30px; }
        .dl-qr { display: flex; align-items: center; gap: 20px; background: var(--bg-body); padding: 15px; border-radius: 12px; display: inline-flex; border: 1px solid var(--border-color); }
        .dl-qr-img { width: 80px; height: 80px; background: #fff; border: 1px solid #ddd; padding: 5px; border-radius: 8px; }
        
        .dl-visual { flex: 1; position: relative; }
        .dl-mockup { width: 100%; max-width: 350px; margin: 0 auto; display: block; position: relative; z-index: 2; border-radius: 30px; box-shadow: 0 30px 60px rgba(0,0,0,0.15); }
        .dl-bg-shape { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 400px; height: 400px; background: var(--primary-light); border-radius: 50%; z-index: 1; }

        .steps-section { padding: 80px 0; background: var(--bg-body); }
        .section-title { text-align: center; font-size: 32px; font-weight: 700; margin-bottom: 50px; }
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .step-card { background: #fff; padding: 40px 30px; border-radius: 16px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.02); }
        .step-icon { width: 64px; height: 64px; background: var(--primary-color); color: #fff; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; margin-bottom: 20px; box-shadow: 0 10px 20px rgba(15,118,110,0.2); }
        .step-title { font-size: 20px; font-weight: 600; margin-bottom: 10px; }
        .step-desc { font-size: 15px; color: var(--text-muted); }

        
        .footer { background: #111827; color: #d1d5db; padding: 60px 0 20px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo span { color: #fff; }
        .footer-title { color: #fff; font-size: 18px; font-weight: 600; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid var(--primary-color); display: inline-block; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a:hover { color: var(--primary-color); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; display: flex; justify-content: space-between; font-size: 13px; opacity: 0.6; }

        @media (max-width: 992px) {
            .dl-layout { flex-direction: column; text-align: center; }
            .dl-content { max-width: 100%; }
            .dl-actions { justify-content: center; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .desktop-nav, .header-actions .btn { display: none; }
            .menu-toggle { display: block; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; gap: 10px; }
        }