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腦闊疼
TA貢獻(xiàn)8條經(jīng)驗(yàn) 獲得超3個(gè)贊
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
.test{
width: 100px;
height: 100px;
background:#f00;
margin: 100px auto;
}
.test::after{
content: "";
display: block;
width: 100px;
height: 100px;
background-color: #00f;
opacity: 0.6;
}
</style>
</head>
<body>
<div class="test">
12312123
</div>
</body>
</html>
親測(cè)可行啊~你是不是因?yàn)?.85效果不明顯看不出來(lái)
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