<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</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 mt-3">
<h2>单选按钮</h2>
<p>下面的表单包含三个单选按钮。默认选中第一项，禁用最后一项：</p>
<form action="/demo/html/action_page.php">
<div class="form-check">
<input type="radio" class="form-check-input" id="radio1" name="optradio" value="option1" checked>
<label class="form-check-label" for="radio1">选项 1</label>
</div>
<div class="form-check">
<input type="radio" class="form-check-input" id="radio2" name="optradio" value="option2">
<label class="form-check-label" for="radio2">选项 2</label>
</div>
<div class="form-check">
<input type="radio" class="form-check-input" disabled>
<label class="form-check-label">选项 3</label>
</div>
<button type="submit" class="btn btn-primary mt-3">提交</button>
</form>
</div>
</body>
</html>