body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF4500; font-size: 2.5em; }
        h2 { color: #FF6347; border-bottom: 2px solid #FF6347; padding-bottom: 5px; }
        h3 { color: #FF8C00; }
        .download-btn { background: #4CAF50; color: white; padding: 10px 20px; border: none; border-radius: 5px; margin: 10px 0; }
        .login-btn { background: #2196F3; color: white; padding: 10px 20px; border: none; border-radius: 5px; margin: 10px 0; }
        .nav { background: #FF4500; padding: 10px; position: sticky; top: 0; z-index: 100; }
        .nav-mobile { display: none; }
        .logo { font-size: 1.8em; font-weight: bold; color: white; }
        .nav-links a { color: white; margin: 0 10px; text-decoration: none; }
        .mobile-toggle { display: none; }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-toggle { display: block; background: #FF6347; color: white; border: none; padding: 10px; }
            .nav-mobile.active .nav-links { display: block; }
        }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { margin-top: 30px; padding: 20px; background: #333; color: white; }
        .tag { background: #666; color: white; padding: 3px 8px; border-radius: 3px; margin: 5px; display: inline-block; }