HTML 代码
<a href="#maincontent" class="absolute top-4 left-4 z-50 px-6 py-3 bg-green-700 text-white text-lg font-semibold rounded-xl shadow-lg transform transition-transform hover:scale-105 focus:outline-none focus:ring-4 focus:ring-green-500 focus:ring-opacity-50 dark:bg-green-900 dark:hover:bg-green-800 dark:focus:ring-green-700">Skip to main content</a>