:root {
            --primary: #1D7BFF;
            --primary-hover: #0056C6;
            --dark-ink: #0B132B;
            --dark-surface: #1C2541;
            --glacier-blue: #E0F2FE;
            --silver-white: #F8FAFC;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --theme-gray: rgb(83,92,104);
            --transition: all 0.3s ease;
            --border-color: rgba(226, 232, 240, 0.8);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--silver-white);
            color: var(--text-dark);
            line-height: 1.6;
        }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        .site-header {
            background-color: var(--dark-ink);
            border-bottom: 1px solid rgba(255,255,255,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 70px;
            display: flex;
            align-items: center;
        }
        .header-container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
        .logo { display: inline-flex; align-items: center; gap: 10px; }
        .logo img { display: block; height: 38px; width: auto; max-width: 160px; object-fit: contain; }
        .logo span { font-size: 18px; font-weight: 800; color: #ffffff; white-space: nowrap; }
        .nav-menu { display: flex; align-items: center; gap: 25px; }
        .nav-menu a { color: #94A3B8; font-size: 15px; font-weight: 500; }
        .nav-menu a:hover { color: #ffffff; }
        .header-btn { background-color: var(--primary); color: #ffffff !important; padding: 8px 18px; border-radius: 6px; font-weight: 600; }
        .menu-toggle { display: none; background: none; border: none; color: #ffffff; font-size: 24px; cursor: pointer; }

        
        .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); z-index: 9999; opacity: 0; visibility: hidden; transition: var(--transition); }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 300px; height: 100%; background: var(--dark-ink); z-index: 10000; transition: left 0.3s ease; display: flex; flex-direction: column; padding: 20px; }
        .drawer.active { left: 0; }
        .drawer-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 15px; margin-bottom: 20px; }
        .drawer-close { background: none; border: none; color: #ffffff; font-size: 28px; cursor: pointer; }
        .drawer-nav { display: flex; flex-direction: column; gap: 15px; }
        .drawer-nav a { color: #94A3B8; font-size: 16px; font-weight: 500; padding: 10px 0; }

        
        .download-hero { background: linear-gradient(135deg, var(--dark-ink) 0%, var(--dark-surface) 100%); color: #ffffff; padding: 60px 0; text-align: center; }
        .download-hero h1 { font-size: 36px; margin-bottom: 15px; font-weight: 800; }
        .download-hero p { color: #94A3B8; max-width: 600px; margin: 0 auto; }

        .dl-section { padding: 60px 0; }
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
        .dl-card { background: #ffffff; border: 1px solid var(--border-color); border-radius: 12px; padding: 40px; text-align: center; display: flex; flex-direction: column; justify-content: space-between; align-items: center; }
        .dl-icon { font-size: 48px; margin-bottom: 20px; }
        .dl-card h3 { font-size: 22px; color: var(--text-dark); margin-bottom: 15px; }
        .dl-card p { color: var(--text-muted); font-size: 15px; margin-bottom: 25px; line-height: 1.6; }
        
        .dl-btn { background-color: var(--primary); color: #ffffff; padding: 12px 30px; border-radius: 6px; font-weight: 600; width: 100%; text-align: center; box-shadow: 0 4px 10px rgba(29, 123, 255, 0.2); }
        .dl-btn:hover { background-color: var(--primary-hover); }

        
        .steps-section { background-color: #ffffff; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 80px 0; }
        .step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 50px; }
        .step-item { text-align: center; position: relative; }
        .step-num { width: 40px; height: 40px; background-color: var(--primary); color: #ffffff; font-weight: 700; font-size: 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
        .step-item h4 { font-size: 18px; margin-bottom: 10px; color: var(--text-dark); }
        .step-item p { color: var(--text-muted); font-size: 14px; }

        
        .site-footer { background-color: var(--dark-ink); color: #94A3B8; padding: 60px 0 30px; border-top: 1px solid rgba(255,255,255,0.1); margin-top: 50px; }
        .footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 40px; }
        .footer-logo-area .logo span { color: #ffffff; }
        .footer-desc { margin-top: 15px; font-size: 14px; }
        .footer-title { color: #ffffff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 30px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; }

        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .menu-toggle { display: block; }
            .grid-2, .step-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
        }