代码示例：（标识：bs_ref_txt_list-unstyled）
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h1>排版</h1>
<p>类 .list-unstyled 删除列表项的默认列表样式和左外边距（仅限直接子项）：</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>
</div>
</body>
</html>
