body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; background: #ff9900; padding: 10px; text-align: center; }
        .desktop-nav { display: block; }
        .logo { font-size: 28px; font-weight: bold; color: #ff4d00; text-shadow: 1px 1px 2px rgba(0,0,0,0.2); }
        nav a { margin: 0 15px; text-decoration: none; color: #0066cc; }
        h1 { color: #ff4d00; border-bottom: 3px solid #ff9900; padding-bottom: 10px; }
        h2 { color: #0066cc; margin-top: 30px; }
        h3 { color: #ff6600; }
        .download-btn { background: #4CAF50; color: white; padding: 12px 24px; border-radius: 5px; display: inline-block; margin: 15px 0; }
        .login-btn { background: #2196F3; color: white; padding: 12px 24px; border-radius: 5px; display: inline-block; margin: 15px 0; }
        .feature-box { background: #f8f8f8; padding: 20px; margin: 15px 0; border-left: 4px solid #ff9900; }
        img { max-width: 100%; height: auto; margin: 15px 0; }
        table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        th, td { border: 1px solid #ddd; padding: 12px; text-align: left; }
        th { background-color: #f2f2f2; }
        .mobile-toggle { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; }
            .mobile-toggle { display: block; background: #ff9900; color: white; border: none; padding: 10px; margin-bottom: 15px; }
        }