<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<style>
* {
margin: 0;
padding: 0;
}
li {
list-style: none;
}
.top {
height: 50px;
background-color: black;
}
.banner {
width: 980px;
height: 150px;
margin: 10px auto;
background-color: black;
}
.box {
width: 980px;
height: 300px;
background-color: black;
margin: auto;
}
.box li {
float: left;
width: 237px;
height: 300px;
background-color: red;
margin-right: 10px;
}
.box .last {
margin: 0;
}
.footer {
height: 300px;
background-color: black;
margin-top: 10px;
}
</style>
</head>
<body>
<div class="top">top</div>
<div class="banner">banner</div>
<ul class="box">
<li>1</li>
<li>2</li>
<li>3</li>
<li class="last">4</li>
</ul>
<div class="footer"></div>
</body>
</html>