想让红色的层到 白色的层下面然后用了，z-index没有效果。。。。不知道怎么了？<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> </head> <!--<link rel="stylesheet" href="css/normalize.css">--> <style type="text/css"> *{ margin: 0; padding:0; } .graph{ /* z-index: 99;*/ width: 1000px; height: 300px; margin: 100px auto; text-align: center; /*font-size:24px;*/ } .effect{ position:relative; box-shadow: 0px 1px 4px rgba(0,0,0,0.3),0px 0px 20px rgba(0,0,0,0.1) inset; -webkit-box-shadow: 0px 1px 4px rgba(0,0,0,0.3),0px 0px 20px rgba(0,0,0,0.1) inset; -moz-box-shadow: 0px 1px 4px rgba(0,0,0,0.3),0px 0px 20px rgba(0,0,0,0.1) inset; -ms-box-shadow: 0px 1px 4px rgba(0,0,0,0.3),0px 0px 20px rgba(0,0,0,0.1) inset; } .effect:after{ content:''; position:absolute; left:53px; top: 50%; width: 90%; height: 50%; z-index: -1; background:#f00; border-radius: 100px/10px; box-shadow:0px 1px 20px rgba(0,0,0,0.8); -webkit-box-shadow:0px 1px 20px rgba(0,0,0,0.8); -moz-box-shadow:0px 1px 20px rgba(0,0,0,0.8); -ms-box-shadow:0px 1px 20px rgba(0,0,0,0.8); } </style> <body> <div class="graph effect"> <h1>曲线阴影</h1> </div> </body></html>
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