body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 2.5em; font-weight: bold; color: #FF9800; text-shadow: 2px 2px 4px rgba(0,0,0,0.2); }
        nav { background: #2C3E50; padding: 10px; margin-bottom: 20px; }
        nav a { color: white; margin: 0 15px; text-decoration: none; }
        .mobile-toggle { display: none; }
        h1 { color: #1E88E5; }
        h2 { color: #43A047; border-bottom: 2px solid #eee; padding-bottom: 5px; }
        h3 { color: #7B1FA2; }
        .download-btn, .login-btn { background: #FF5722; color: white; padding: 10px 20px; margin: 10px 0; display: inline-block; border-radius: 5px; }
        .highlight { background: #FFFDE7; padding: 5px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tag { background: #E0E0E0; padding: 3px 8px; border-radius: 12px; margin: 3px; display: inline-block; }
        footer { margin-top: 50px; padding: 20px; background: #2C3E50; color: white; }
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            nav { display: none; }
            .show-nav { display: block; }
        }