HTML 代码
<div class="flex justify-center items-center h-screen bg-gray-100 dark:bg-gray-900">
<div class="relative group">
<button class="px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700 transition-colors duration-200">Hover Me</button>
<div class="absolute bottom-full mb-2 left-1/2 transform -translate-x-1/2 px-3 py-2 bg-gray-800 text-white text-sm rounded opacity-0 group-hover:opacity-100 transition-opacity duration-300">
Hello! I'm a Tooltip
</div>
</div>
</div>