<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<!-- 外部引入的两种方式 -->
<!-- <style>
@import url("./less/less003.css");
</style> -->
或
<link href="less/less003.css" rel="stylesheet">
</head>
<body>
<div>
hello world
</div>
<p>hello new world</p>
</body>
</html>