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

<div class="p-4">
  <h2>卡片页眉和页脚</h2>
  <div class="card">
    <div class="card-header">页眉</div>
    <div class="card-body">内容</div> 
    <div class="card-footer">页脚</div>
  </div>
</div>

</body>
</html>
运行结果: