body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF6600; font-size: 2.5em; text-align: center; margin-bottom: 10px; }
        h2 { color: #0066CC; font-size: 1.8em; margin-top: 30px; }
        h3 { color: #339966; font-size: 1.4em; }
        .logo { font-size: 2.8em; font-weight: bold; color: #FF4500; text-align: center; margin: 20px 0; }
        .nav { background-color: #111; overflow: hidden; position: sticky; top: 0; }
        .nav a { float: left; display: block; color: white; text-align: center; padding: 14px 16px; text-decoration: none; }
        .nav .icon { display: none; }
        .download-btn { background-color: #4CAF50; color: white; padding: 12px 24px; margin: 20px 0; border: none; border-radius: 4px; cursor: pointer; }
        .login-btn { background-color: #008CBA; color: white; padding: 12px 24px; margin: 20px 0; border: none; border-radius: 4px; cursor: pointer; }
        .image-container { text-align: center; margin: 20px 0; }
        .image-container img { max-width: 100%; height: auto; }
        .tag { background-color: #f0f0f0; padding: 5px 10px; border-radius: 15px; margin: 5px; display: inline-block; }
        @media screen and (max-width: 600px) {
            .nav a:not(:first-child) { display: none; }
            .nav a.icon { float: right; display: block; }
            .nav.responsive { position: relative; }
            .nav.responsive .icon { position: absolute; right: 0; top: 0; }
            .nav.responsive a { float: none; display: block; text-align: left; }
        }