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三个圆自适应.html
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三个圆自适应.html
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<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
.father {
display: flex;
flex-direction: row;
}
.pad {
width: 33.33%;
border-radius: 50%;
padding-top: 33.33%;
background-color: yellow;
}
.aft{
width: 33.33%;
border-radius: 50%;
background-color: green;
}
.aft::after{
content: '';
display: block;
margin-top: 100%;
}
.vww{
width: 33.33vw;
border-radius: 50%;
height: 33.33vw;
background-color: red;
}
</style>
</head>
<body>
padding/margin用百分比时，是相对父元素的宽度。
<div class="father">
<div class="pad"></div>
<div class="pad"></div>
<div class="pad"></div>
</div>
<div class="father">
<div class="aft"></div>
<div class="aft"></div>
<div class="aft"></div>
</div>
<div class="father">
<div class="vww"></div>
<div class="vww"></div>
<div class="vww"></div>
</div>
</body>
</html>