<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style>
*{
margin:0;
padding:0;
color:#fff;
}
/*
弹性布局
section {
80%;
height:20px;
margin:100px auto;
display:flex;
background:red;
}
div:first-child {
200px;
background:yellow;
}
div:nth-child(2) {
100%;
background:blue;
}
div:nth-child(3){
200px;
background:yellow;
}*/
/* float设置布局
section {
margin:100px auto;
80%;
background:red;
color:#000;
}
div:first-child {
200px;
float:left;
background:yellow;
}
div:nth-child(2) {
calc(100% - 450px);
background:blue;
float:left;
}
div:nth-child(3){
250px;
float:left;
background:yellow;
}
*/
/*定位的手段*/
section {
margin:100px auto;
80%;
background:red;
color:#000;
position:relative;
}
div:first-child {
200px;
position:absolute;
left:0;
top:0;
background:yellow;
}
div:nth-child(2) {
100%;
background:blue;
box-sizing:border-box;
padding-left:200px;
padding-right:250px;
}
div:nth-child(3){
250px;
position:absolute;
right:0;
top:0;
background:yellow;
}
</style>
</head>
<body>
<section>
<div>121</div>
<div>22</div>
<div>333</div>
</section>
</body>
</html>