body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; position: fixed; top: 0; width: 100%; background: #1a3c8a; color: white; padding: 10px; z-index: 100; }
            .nav-toggle { position: absolute; right: 20px; top: 15px; }
            .nav-content { display: none; padding: 10px; }
        }
        h1 { color: #1a3c8a; border-bottom: 3px solid #f7941e; padding-bottom: 10px; }
        h2 { color: #f7941e; margin-top: 30px; }
        h3 { color: #5d8bc0; }
        .download-btn { display: inline-block; background: #4CAF50; color: white; padding: 12px 24px; margin: 15px 0; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .login-btn { display: inline-block; background: #2196F3; color: white; padding: 12px 24px; margin: 15px 0; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .image-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        .tag { background: #e0e0e0; padding: 5px 10px; margin: 5px; border-radius: 15px; display: inline-block; }
        .footer { margin-top: 50px; padding-top: 20px; border-top: 2px solid #eee; }