<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>绝对定位</title>
<!-- 特点：设置绝对定位是会脱离文档流 -->
<style type="text/css">
.box1{
width: 200px;
height: 200px;
background-color: red;
}
.box2{
width: 200px;
height: 200px;
background-color: yellow;
position: absolute;
left: 100px;
top: 100px;
}
.box3{
width: 300px;
height: 300px;
background-color: yellowgreen;
}
.box4{
width: 300px;
height: 300px;
background-color: orange;
position: relative;
}
.s1{
width: 100px;
height: 100px;
background-color: yellow;
position: absolute;
}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box5">
<div class="box4">
<div class="box2"></div>
</div>
</div>
<div class="box3"></div>
<span class="s1" >我是一个span</span>
</body>
</html>
