可以在 Markdown 中插入类似 Callouts 的效果！

Callouts in Markdown!

Hello!

Info (蓝色)

<div style="padding: 20px;margin: 20px 0; border: 1px solid #eee; border-left-width: 5px; border-radius: 3px;">
  <h4 style="margin-top: 0; margin-bottom: 5px; color: #428bca">Callouts in Markdown!</h4>
  Hello!
</div>

Warning (黄色)

<div style="padding: 20px;margin: 20px 0; border: 1px solid #eee; border-left-width: 5px; border-radius: 3px;">
  <h4 style="margin-top: 0; margin-bottom: 5px; color: #f0ad4e">Callouts in Markdown!</h4>
  Hello!
</div>

Danger (红色)

<div style="padding: 20px;margin: 20px 0; border: 1px solid #eee; border-left-width: 5px; border-radius: 3px;">
  <h4 style="margin-top: 0; margin-bottom: 5px; color: #d9534f">Callouts in Markdown!</h4>
  Hello!
</div>