body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #0066cc; }
        h1 { font-size: 2.2em; }
        h2 { font-size: 1.8em; margin-top: 30px; }
        h3 { font-size: 1.4em; margin-top: 25px; }
        .logo { font-size: 2.5em; font-weight: bold; color: #ff9900; text-shadow: 2px 2px 4px #ccc; margin-bottom: 20px; }
        nav { background: #f8f8f8; padding: 10px; margin-bottom: 20px; display: flex; justify-content: space-between; align-items: center; }
        nav a { margin: 0 10px; text-decoration: none; color: #0066cc; }
        .mobile-nav-btn { display: none; background: #0066cc; color: white; padding: 8px 12px; border-radius: 5px; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav-btn { display: block; }
        }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; margin: 15px 0; font-size: 1.1em; border-radius: 5px; text-decoration: none; }
        .download-btn { background: #4CAF50; color: white; }
        .login-btn { background: #2196F3; color: white; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        footer { margin-top: 40px; padding: 20px; background: #f0f0f0; }
        .tag { display: inline-block; margin: 5px; padding: 5px 10px; background: #e0e0e0; border-radius: 3px; }