.tou{ height: 100px; background-color: rgba(0,0,0,0.5); filter: Alpha(opacity=50); color: #fff; }
html
<div class="tou"> hhhhhh </div>
.tou{ height: 100px; background-color: rgba(0,0,0,0.5); filter: Alpha(opacity=50); color: #fff; }
html
<div class="tou"> hhhhhh </div>
原文：https://www.cnblogs.com/huahua0825/p/8427527.html