body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #ff6b35; text-align: center; margin-bottom: 10px; }
        h2 { color: #4a90e2; border-bottom: 2px solid #f0f0f0; padding-bottom: 5px; }
        h3 { color: #2ecc71; }
        .download-btn { background: #27ae60; color: white; padding: 12px 25px; text-align: center; margin: 20px 0; display: inline-block; border-radius: 5px; text-decoration: none; }
        .login-btn { background: #3498db; color: white; padding: 12px 25px; text-align: center; margin: 20px 0; display: inline-block; border-radius: 5px; text-decoration: none; }
        .mobile-nav { display: none; background: #333; color: white; padding: 10px; text-align: center; }
        .desktop-nav { display: flex; justify-content: space-around; background: #333; color: white; padding: 15px; }
        .desktop-nav a { color: white; text-decoration: none; }
        .content-img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { background: #f0f0f0; padding: 20px; text-align: center; margin-top: 30px; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; }
        }