双飞翼布局
float布局
margin负值
防止两侧被覆盖,用margin
<!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>
.fr{
float: left;
}
.main{
width: 100%;
height: 100px;
border: 1px solid pink;
}
.main-container{
margin: 0 200px 0 200px;
}
.left{
width: 200px;
height: 100px;
background: #ccc;
margin-left: -100%;
}
.right{
width: 200px;
height: 100px;
background: #233;
color: #fff;
margin-left: -200px;
}
.clearfix::after{
content: '';
display: table;
clear: both;
}
</style>
</head>
<body>
<div class="container clearfix">
<div class="main fr">
<div class="main-container">
233333
</div>
</div>
<div class="left fr">left</div>
<div class="right fr">right</div>
</div>
</body>
</html>