<!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 mt-3">
<h2>浮动标签 - 输入控件</h2>
<p>请在输入框内点击，来查看浮动标签效果：</p>
<form action="/demo/html/action_page.php">
<div class="form-floating mb-3 mt-3">
<input type="text" class="form-control" id="email" placeholder="请输入电邮地址" name="email">
<label for="email">电邮</label>
</div>
<div class="form-floating mt-3 mb-3">
<input type="text" class="form-control" id="pwd" placeholder="请输入密码" name="pswd">
<label for="pwd">密码</label>
</div>
<button type="submit" class="btn btn-primary">提交</button>
</form>
</div>
</body>
</html>