2.16(2)
css:
.box1{
margin: 20rpx auto;
width: 100rpx;
height: 100rpx;
background-color: red;
box-shadow: 3px 3px 4px black;
}
.box2{
margin: 20rpx auto;
width: 200rpx;
height: 200rpx;
background-color:green;
box-shadow: 3px 3px 3px black;
}
.box3{
margin: 20rpx auto;
width: 250rpx;
height: 250rpx;
background-color: blue;
box-shadow: 3px 3px 3px black;
}
html:
<view class="box1">
<text>red</text>
</view>
<view class="box2">
<text>green</text>
</view>
<view class="box3">
<text>blue</text>
</view>

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