<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
body {
min-width: 600px;
}
.header {
width: 100%;
height: 100px;
background-color: aquamarine;
}
.footer {
width: 100%;
height: 100px;
background-color: brown;
}
.left {
width: 100px;
height: 100px;
background-color: blueviolet;
float: left;
z-index: 2;
margin-top: -100px;
}
.right {
width: 100px;
height: 100px;
background-color: blue;
float: right;
z-index: 2;
margin-top: -100px;
}
.middle {
width: 100%;
height: 100px;
background-color: coral;
}
.box {
padding-left: 100px;
padding-right: 100px;
}
</style>
</head>
<body>
<div class="header">header</div>
<div class="box">
<div class="middle">middle</div>
</div>
<div class="left">left</div>
<div class="right">right</div>
<div class="footer">footer</div>
</body>
</html>
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