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; margin-top: 30px; }
        h1 { font-size: 2.5em; }
        h2 { font-size: 2em; }
        h3 { font-size: 1.5em; }
        .logo { font-size: 2em; font-weight: bold; color: #ff9900; text-align: center; margin: 20px 0; }
        .nav { background: #f8f8f8; padding: 10px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        .nav a { color: #0066cc; text-decoration: none; font-weight: bold; }
        .mobile-toggle { display: none; }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; }
            .nav.active { display: flex; }
            .mobile-toggle { display: block; text-align: center; background: #0066cc; color: white; padding: 10px; cursor: pointer; }
        }
        .download-btn, .login-btn { display: inline-block; padding: 10px 20px; background: #00cc66; color: white; text-decoration: none; border-radius: 5px; margin: 10px 0; }
        .image-container { text-align: center; margin: 20px 0; }
        .image-container img { max-width: 100%; height: auto; }
        .bottom-links { margin-top: 40px; }
        .tag { display: inline-block; background: #e0e0e0; padding: 5px 10px; margin: 5px; border-radius: 3px; }
        .copyright { margin-top: 50px; text-align: center; font-size: 0.9em; color: #666; }