html运行实例（bs_grid_examples

代码示例：（标识：bs_grid_examples_2）
<!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.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.bundle.js"></script>
</head>
<body>

<div class="container-fluid mt-3">
  <h2>三等分列</h2>
  <p>您还可以使用数字来控制列宽。只需确保总和等于或小于 12（不需要使用所有 12 个可用列）：</p>
  <div class="row">
    <div class="col-4 bg-success">.col-4</div>
    <div class="col-4 bg-warning">.col-4</div>
    <div class="col-4 bg-success">.col-4</div>
  </div>
</div>

</body>
</html>