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; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; }
            .nav-toggle { background: #ff4500; color: white; border: none; padding: 10px; cursor: pointer; }
        }
        h1 { color: #ff4500; border-bottom: 2px solid #333; padding-bottom: 10px; }
        h2 { color: #2c3e50; margin-top: 30px; }
        h3 { color: #e67e22; }
        .download-btn, .login-btn { background: #2ecc71; color: white; padding: 12px 25px; text-decoration: none; border-radius: 5px; margin: 15px 0; display: inline-block; }
        .login-btn { background: #3498db; }
        .image-container { text-align: center; margin: 25px 0; }
        .tag { background: #f1f1f1; padding: 5px 10px; margin: 5px; border-radius: 20px; display: inline-block; }
        footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; }