body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 28px; font-weight: bold; color: #FF9900; text-align: center; margin: 20px 0; }
        .nav { display: flex; justify-content: center; gap: 20px; margin: 20px 0; }
        .nav a { color: #0066CC; text-decoration: none; font-weight: bold; }
        .mobile-nav-toggle { display: none; position: fixed; top: 10px; right: 10px; background: #0066CC; color: white; border: none; padding: 10px; }
        h1 { color: #003366; border-bottom: 2px solid #FF9900; padding-bottom: 10px; }
        h2 { color: #0066CC; margin-top: 30px; }
        h3 { color: #FF9900; }
        .button { display: inline-block; padding: 10px 20px; background: #0066CC; color: white; text-decoration: none; border-radius: 5px; margin: 10px 0; }
        .download-btn { background: #4CAF50; }
        .login-btn { background: #2196F3; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tags a { background: #eee; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }
        .footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; text-align: center; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; align-items: center; }
            .mobile-nav-toggle { display: block; }
            .desktop-nav { display: none; }
            .desktop-nav.active { display: flex; flex-direction: column; }
        }