.wrap{ width:800px; height:500px; margin:0 auto; position:relative; } .wrap :after{ content:''; background:transparent; position:absolute; top:50%; bottom:0px; right:20px; left:20px; z-index:-2; }
部分代码,想做曲线阴影,为什么设置了z-index,.wrap :after还是在前边????该怎么写???
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