<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>首页</title>
<!-- 后期建议将CSS与HTML分离 -->
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.header {
width: 100%;
height: 4.1125rem;
background-color: aqua;
}
.container {
margin: 1.25rem auto;
width: 85%;
height: 31.25rem;
background-color: aquamarine;
}
.footer {
width: 100%;
height: 6.25rem;
background-color: antiquewhite;
}
</style>
</head>
<body>
<div class="header">
header
</div>
<div class="container">
container
</div>
<div class="footer">
footer
</div>
</body>
</html>
原文：https://www.cnblogs.com/GetcharZp/p/11614012.html