HTML 代码
<button class="bg-black text-white font-bold py-2 px-4 border border-black active:bg-zinc-700 active:border-zinc-700 focus:outline-none focus:ring-2 focus:ring-black focus:ring-opacity-50 dark:bg-white dark:text-black dark:border-white dark:active:bg-zinc-300 dark:active:border-zinc-300 dark:focus:ring-white">Follow</button>