css_position_relative_and_absolute
<!DOCTYPE html>
<html lang="en">
<head>
<title>Title</title>
<meta charset="UTF-8">
<style>
.div1{
width: 100px;
height: 100px;
background-color: #fac237;
}
.div2{
width: 100px;
height: 100px;
background-color: #b18621;
top: 100px;
left: 100px;
/*相对*/
/*position: relative;*/
/*绝对*/
position: absolute;
}
.div3{
width: 200px;
height: 200px;
background-color: #77bafc;
}
</style>
</head>
<body>
<div class="div1">11</div>
<div class="div2">22</div>
<div class="div3">33</div>
</body>
</html>