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; }
        h1 { font-size: 2.2em; text-align: center; margin-bottom: 30px; }
        h2 { font-size: 1.8em; border-bottom: 2px solid #0066cc; padding-bottom: 10px; margin-top: 40px; }
        h3 { font-size: 1.4em; color: #004d99; }
        .logo { font-size: 2.5em; font-weight: bold; color: #ff6600; text-align: center; margin: 20px 0; }
        .nav { background-color: #f8f8f8; padding: 15px; border-radius: 5px; margin-bottom: 20px; }
        .nav a { margin: 0 15px; text-decoration: none; color: #0066cc; font-weight: bold; }
        .mobile-nav-btn { display: none; background: #0066cc; color: white; padding: 10px; border: none; border-radius: 5px; cursor: pointer; }
        .content { margin-bottom: 40px; }
        .download-btn, .login-btn { display: inline-block; background: #ff6600; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .highlight { background-color: #ffffcc; padding: 5px 10px; border-radius: 3px; }
        .image-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        .tags { margin: 30px 0; }
        .tag { display: inline-block; background: #e0e0e0; padding: 5px 10px; margin: 5px; border-radius: 20px; }
        .footer { background: #f0f0f0; padding: 20px; text-align: center; margin-top: 50px; }
        @media (max-width: 768px) {
            .nav { display: none; }
            .mobile-nav-btn { display: block; margin: 20px auto; }
            .show-nav { display: block; }
            h1 { font-size: 1.8em; }
            h2 { font-size: 1.5em; }
        }