Correcting teacher:PHPz
Correction status:qualified
Teacher's comments:
<div class="box">
<div class="one">我是第一层</div>
<div class="two">我是第二层</div>
<div class="three">我是第三层</div>
</div>
.box .one{
height: 50px;
width: 500px;
background-color: aqua;
position: relative;
top:20px;
left: 50px;
}
.box .two{
height: 50px;
background-color:chartreuse;
position:absolute;
top: 50px;
left: 30px;
}
.box .three{
height: 50px;
background-color:burlywood;
position: fixed;
top:100px;
left: 50px;