div{
width: 100px;
height: 100px;
background-color: #7A45E5;
margin: 2px;
}
#a{
background-color: yellow;
position: relative;
left: 120px;
top: 30px;
}
#b{
position: relative;
top: -30px;
}
sty

div{
width: 100px;
height: 100px;
background-color: #7A45E5;
margin: 2px;
}
#a{
background-color: yellow;
position: relative;
left: 120px;
top: 30px;
}
#b{
position: relative;
top: -30px;
}
sty
本文标题:定位3
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