body { font-family: 'Arial', sans-serif; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 20px; color: #333; }
        .logo { font-size: 28px; font-weight: bold; color: #FF9900; text-align: center; margin: 20px 0; }
        nav { background: #333; padding: 10px; display: flex; justify-content: space-around; }
        nav a { color: white; text-decoration: none; }
        .mobile-nav-btn { display: none; }
        h1 { color: #FF6600; border-bottom: 2px solid #FF9900; padding-bottom: 10px; }
        h2 { color: #3366CC; margin-top: 30px; }
        h3 { color: #663399; }
        .download-btn, .login-btn { background: #FF9900; color: white; padding: 12px 25px; margin: 15px 0; border-radius: 5px; text-decoration: none; display: inline-block; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        footer { margin-top: 50px; padding: 20px; background: #333; color: white; text-align: center; }
        @media (max-width: 768px) {
            nav { flex-direction: column; align-items: center; }
            .mobile-nav-btn { display: block; background: #FF9900; color: white; border: none; padding: 10px; margin: 10px auto; }
            .desktop-nav { display: none; }
            .mobile-nav-btn.active + .desktop-nav { display: block; }
        }