<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Title</title>
<style>
*{
margin: 0;
padding: 0;
}
.con{
width: 980px;
height: 500px;
margin: 0 auto;
background-color: coral;
}
.header{
width: 100%;
height: 100px;
background-color: blue;
}
.content{
/*给了width内容会溢出*/
/*width: 100%;*/
height: 500px;
background-color: yellow;
/*padding-left: 150px;*/
/*padding-right: 100px;*/
}
.content .left{
width: 150px;
margin-left: -100%;
float: left;
height: 100%;
background-color: green;
}
.content .right{
width: 100px;
margin-right: -100%;
/*float: right;*/
float:left ;
margin-left:-100px;
height: 100%;
background-color: saddlebrown;
}
.content .middle{
width: 100%;
height: 100%;
float: left;
background-color: #f00;
}
.content .inner{
margin-left: 150px;
margin-right: 100px;
}
.footer{
width: 100%;
height: 100px;
background-color: purple;
}
.clear{
clear: both;
}
</style>
</head>
<body>
<div class="con">
<div class="header">
#我是头部信息
</div>
<div class="content">
<!-- #我是内容-->
<div class='middle'>
<div class='inner'>#middle</div>
</div>
<div class='left'>#left</div>
<div class='right'>#right</div>
<div class="clear"></div>
</div>
<div class="footer">
#我是尾部
</div>
</div>
</body>
</html>
