<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container-fluid mt-3">
<h2>三等分列</h2>
<p>在指定数量的元素上使用 .col 类，Bootstrap 将识别有多少元素（并创建等宽列）。在下面的例子中，我们使用了三个 col 元素，每个元素的宽度为 33.33%。</p>
<div class="row">
<div class="col bg-success">.col</div>
<div class="col bg-warning">.col</div>
<div class="col bg-success">.col</div>
</div>
</div>
</body>
</html>