body { font-family: 'Arial', sans-serif; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 20px; color: #333; }
        .mobile-nav { display: none; background: #ff9900; color: white; padding: 10px; text-align: center; cursor: pointer; }
        @media (max-width: 768px) { .desktop-nav { display: none; } .mobile-nav { display: block; } }
        .logo { font-size: 24px; font-weight: bold; color: #ff6600; text-decoration: none; }
        .nav-links { display: flex; gap: 20px; margin: 15px 0; }
        .nav-links a { color: #0066cc; text-decoration: none; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .download-btn { background: #4CAF50; color: white; padding: 12px 25px; border: none; border-radius: 5px; margin: 15px 0; display: inline-block; }
        .login-btn { background: #2196F3; color: white; padding: 12px 25px; border: none; border-radius: 5px; margin: 15px 10px; display: inline-block; }
        .tag { background: #f0f0f0; padding: 5px 10px; border-radius: 15px; margin: 5px; display: inline-block; }