:root { --primary: rgb(225,112,85); --primary-hover: rgb(200, 90, 65); --primary-light: rgba(225,112,85, 0.1); --text-dark: #2d3436; --text-gray: #636e72; --bg-body: #f8f9fa; --bg-white: #ffffff; --border: #eaedf1; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'PingFang SC', sans-serif; background: var(--bg-body); color: var(--text-dark); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

        
        .site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); box-shadow: 0 2px 10px 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; }
        .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
        .logo span { font-size: 20px; font-weight: 800; color: #111; white-space: nowrap; }
        .desktop-nav ul { display: flex; gap: 24px; }
        .desktop-nav a { font-size: 16px; font-weight: 500; }
        .desktop-nav a:hover { color: var(--primary); }
        .header-actions { display: flex; gap: 12px; align-items: center; }
        .btn { padding: 10px 24px; border-radius: 6px; font-weight: 600; cursor: pointer; transition: 0.3s; display: inline-block; }
        .btn-primary { background: var(--primary); color: #fff; border: 1px solid var(--primary); }
        .btn-primary:hover { background: var(--primary-hover); }
        .btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
        
        .mobile-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; }
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); opacity: 0; visibility: hidden; z-index: 999; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .mobile-drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: #fff; z-index: 1000; transition: 0.3s; display: flex; flex-direction: column; }
        .mobile-drawer.active { left: 0; }
        .drawer-header { padding: 20px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--border); }
        .drawer-close { background: none; border: none; font-size: 28px; cursor: pointer; }
        .drawer-body { padding: 20px; overflow-y: auto; flex-grow: 1; }
        .mobile-nav li { margin-bottom: 16px; font-weight: 500; }
        .drawer-footer { padding: 20px; border-top: 1px solid var(--border); }

        .site-footer { background: #1e272e; color: #d2dae2; padding: 70px 0 20px; font-size: 14px; margin-top: 0; }
        .footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 50px; }
        .brand-col .logo { background: #fff; padding: 8px 16px; border-radius: 8px; margin-bottom: 20px; }
        .footer-title { color: #fff; font-size: 18px; font-weight: 700; margin-bottom: 20px; }
        .footer-links li, .footer-contact li { margin-bottom: 12px; }
        .footer-links a:hover { color: var(--primary); }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); opacity: 0.6; }

        
        .dl-hero { background: linear-gradient(135deg, var(--bg-body), #fff); padding: 80px 0; overflow: hidden; }
        .dl-hero-inner { display: flex; align-items: center; gap: 60px; }
        .dl-text { flex: 1; }
        .dl-title { font-size: 42px; font-weight: 800; color: #111; margin-bottom: 20px; line-height: 1.3; }
        .dl-desc { font-size: 18px; color: var(--text-gray); margin-bottom: 40px; }
        .dl-btns { display: flex; gap: 20px; margin-bottom: 30px; }
        .dl-btn { display: flex; align-items: center; gap: 12px; background: #111; color: #fff; padding: 15px 30px; border-radius: 8px; font-size: 18px; font-weight: bold; transition: 0.3s; }
        .dl-btn:hover { background: var(--primary); transform: translateY(-3px); box-shadow: 0 10px 20px var(--primary-light); }
        .dl-btn svg { width: 30px; height: 30px; }
        .dl-qr { display: flex; align-items: center; gap: 20px; }
        .dl-qr img { width: 100px; height: 100px; padding: 5px; background: #fff; border: 1px solid var(--border); border-radius: 8px; }
        .dl-visual { flex: 1; text-align: center; }
        .dl-visual img { display: inline-block; max-height: 500px; border-radius: 20px; box-shadow: 0 20px 50px rgba(0,0,0,0.15); }

        .dl-features { padding: 80px 0; background: #fff; }
        .section-title { text-align: center; font-size: 32px; font-weight: 800; margin-bottom: 50px; }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; text-align: center; }
        .f-icon { width: 70px; height: 70px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; border-radius: 20px; margin: 0 auto 20px; }
        .f-icon svg { width: 32px; height: 32px; }
        .f-title { font-size: 22px; font-weight: bold; margin-bottom: 12px; }
        .f-desc { color: var(--text-gray); }

        .dl-steps { padding: 80px 0; background: var(--bg-body); }
        .steps-container { max-width: 900px; margin: 0 auto; background: #fff; padding: 50px; border-radius: 16px; box-shadow: 0 5px 20px rgba(0,0,0,0.03); }
        .step-row { display: flex; gap: 30px; align-items: flex-start; margin-bottom: 40px; }
        .step-row:last-child { margin-bottom: 0; }
        .step-num { width: 50px; height: 50px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; flex-shrink: 0; }
        .step-content h3 { font-size: 20px; margin-bottom: 10px; color: #111; }
        .step-content p { color: var(--text-gray); }
        .step-content .highlight { background: var(--bg-body); padding: 10px 15px; border-radius: 6px; font-family: monospace; display: inline-block; margin-top: 10px; color: var(--primary); }

        @media (max-width: 992px) {
            .desktop-nav, .header-actions.desktop-only { display: none; }
            .mobile-toggle { display: block; }
            .dl-hero-inner { flex-direction: column; text-align: center; }
            .dl-btns { justify-content: center; flex-direction: column; }
            .dl-qr { justify-content: center; }
            .feature-grid { grid-template-columns: 1fr; }
            .footer-top { grid-template-columns: 1fr; }
            .steps-container { padding: 30px 20px; }
        }