<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
.father{
position: relative;
min-width: 700px;
}
.left{
height: 200px;
width: 200px;
background: rgba(255,0,0,0.5);
float: left;
/*float: left;*/
position: absolute;
left: 0;
top: 0;
}
.right{
height: 200px;
width: 200px;
background: rgba(255,0,0,0.5);
float: left;
/*float: right;*/
position: absolute;
right: 0;
top:0;
}
.center{
height: 200px;
background: blue;
/*float: left;*/
/*width: calc(100% - 400px);*/
margin-left: 200px;
margin-right: 200px;
/*min-width: 300px;*/
}
</style>
</head>
<body>
<div class="father">
<div class="left"></div>
<div class="center"></div>
<div class="right"></div>
</div>
</body>
</html>
