菜鸟教程在线编辑器

AI 编程工具

 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
.center {
    text-align: center;
    border: 3px solid green;
}
</style>
</head>
<body>

<h2>文本居中对齐</h2>

<div class="center">
  <p>文本居中对齐。</p>
</div>

</body>
</html>
              