<meta name="viewport" content="width=device-width, initial-scale=1">

<link rel="stylesheet" href="/static/lib/bootstrap/4.0.0/css/bootstrap.min.css">

<script src="/static/lib/jquery/3.3.1/jquery.min.js"></script>

<script src="/static/lib/popper.js/1.12.9/umd/popper.min.js"></script>

<script src="/static/lib/bootstrap/4.0.0/js/bootstrap.min.js"></script>

<div class="container">

  <h2>排版</h2>

  <p>The class .list-unstyled removes the default list-style and left margin on list items (immediate children only):</p>

  <ul class="list-unstyled">

    <li>Coffee</li>

    <li>Tea

      <ul>

        <li>Black tea</li>

        <li>Green tea</li>

      </ul>

    </li>

    <li>Milk</li>

  </ul>