<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
.div1:before{
content: " ";
position: absolute;
left: 0; top: 0;
right: 0;
height: 1px;
border-top: 1px solid #D9D9D9;
color: #D9D9D9;
-webkit-transform-origin: 0 0;
transform-origin: 0 0;
-webkit-transform: scaleY(0.5);
transform: scaleY(0.5);
}
.div2{
border:1px solid red;
}
</style>
</head>
<body>
<div class="div1">这里是盒子内的实际内容。有 25px 内间距,25px 外间距、25px 绿色边框。</div>
<div class="div2"></div>
</body>
</html>
css3做0.5px细线
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转载自blog.csdn.net/mbh12333/article/details/80596387
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