:root { --primary-color: rgb(90,200,250); --text-dark: #1e293b; --text-normal: #475569; --bg-body: #f8fafc; --bg-white: #ffffff; --border-color: #e2e8f0; --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: sans-serif; background-color: var(--bg-body); color: var(--text-normal); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: all 0.3s; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        .header { background-color: var(--bg-white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-sm); }
        .header .container { 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: 36px; 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; }
        .nav-desktop a { font-weight: 500; color: var(--text-dark); }
        .menu-btn { display: none; font-size: 24px; background: none; border: none; cursor: pointer; color: var(--text-dark); }
        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; visibility: hidden; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: var(--bg-white); z-index: 999; transition: all 0.3s; display: flex; flex-direction: column; }
        .drawer.active { left: 0; } .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; }
        .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; }
        .drawer-nav { padding: 20px 0; overflow-y: auto; }
        .drawer-nav a { display: block; padding: 15px 20px; font-size: 16px; border-bottom: 1px solid var(--border-color); }

        .dl-hero { padding: 80px 0; background: linear-gradient(to bottom, var(--bg-white), var(--bg-body)); display: flex; align-items: center; gap: 60px; }
        .dl-text { flex: 1; }
        .dl-text h1 { font-size: 42px; color: var(--text-dark); font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
        .dl-text p { font-size: 18px; margin-bottom: 40px; }
        .dl-buttons { display: flex; gap: 20px; }
        .btn-dl { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; background: var(--primary-color); color: white; border-radius: 8px; font-weight: bold; font-size: 16px; box-shadow: 0 4px 10px rgba(90,200,250,0.3); }
        .btn-dl:hover { background: rgb(60,180,230); transform: translateY(-2px); }
        .dl-mockup { flex: 1; display: flex; justify-content: center; }
        .phone-frame { width: 260px; height: 520px; background: #fff; border: 12px solid #1e293b; border-radius: 36px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; flex-direction: column; }
        .phone-notch { position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 120px; height: 25px; background: #1e293b; border-bottom-left-radius: 12px; border-bottom-right-radius: 12px; }
        .phone-frame span { font-size: 24px; font-weight: bold; color: var(--primary-color); }

        .dl-steps { padding: 60px 0; background: var(--bg-white); border-top: 1px solid var(--border-color); text-align: center; }
        .dl-steps h2 { font-size: 30px; color: var(--text-dark); margin-bottom: 40px; }
        .step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .step-item { padding: 30px; border: 1px dashed var(--border-color); border-radius: 12px; }
        .step-num { width: 40px; height: 40px; background: var(--primary-color); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: bold; margin: 0 auto 20px; }

        .footer { background: #0f172a; color: #94a3b8; padding: 60px 0 20px; margin-top: auto; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-about .logo span { color: white; }
        .footer-title { color: white; font-size: 18px; font-weight: 700; margin-bottom: 20px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-bottom { border-top: 1px solid #1e293b; padding-top: 20px; display: flex; justify-content: space-between; font-size: 14px; }
        .footer-meta-links { display: flex; gap: 15px; }

        @media (max-width: 768px) {
            .nav-desktop { display: none; } .menu-btn { display: block; }
            .dl-hero { flex-direction: column; text-align: center; } .dl-buttons { justify-content: center; flex-direction: column; }
            .step-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
        }