<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>双飞翼布局</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
.header,.footer{
width: 100%;
height: 200px;
background-color: aquamarine;
}
.container{
width: 100%;
overflow: auto;
}
.container>div{
float: left;
}
.left{
width: 200px;
height: 300px;
background-color: chartreuse;
margin-left: -100%;
}
.right{
width: 300px;
height: 300px;
background-color:#55aaff;
margin-left: -300px;
}
.midder{
width: 100%;
height: 300px;
background-color: bisque;
}
.text{
margin-left: 200px;
}
</style>
</head>
<body>
<div class="header">头部</div>
<div class="container">
<div class="midder"><div class="text">文本</div></div>
<div class="left">左</div>
<div class="right">右</div>
</div>
<div class="footer">底部</div>
<!-- 中间自适应，两边定宽 -->
</body>
</html>