关于蒙层实现的不同方法，我们可以用CSS和jQuery两种方法
Jquery方法
首先看一下HTML代码：
`
孤独症儿童行为检查量表（ABC）
已有777人参与
` #####css代码： `.list_images { position: relative; width: 1000px; margin: 0 auto; text-align: center; } .content { margin-left: 26px; margin-top:18px; margin-bottom: 1%; height: 200px; width: 30%; position: relative; cursor: pointer; display: inline-block; box-shadow: 0px 3px 3px 0px rgb(0,0,0,0.05); } h3 { position: relative; color: #484848; font-size: 16px; font-weight: bold; left: 0px; } p { position: relative; left: -10px; color: #aaaaaa; font-size: 12px; } .mask { height: 100%; width: 100%; position: absolute; top: 0px; display: none; background-color: rgba(0, 0, 0, 0.5); color: #EEEEEE; font-size: 20px; } .mask_title { font-size:16px; margin-top: 20%; text-align: center; } .mask_btn { display: inline-block; text-decoration: none; color: #eee; width: 100px; height: 28px; line-height: 28px; font-size: 14px; text-align: center; border-radius: 14px; background: #5691fe; list-style: none; cursor: pointer; margin-top: 20px; } ` #####jquery代码： `` ###Css方法： #####只需要在css样式中再添加.content:hover .mask {display: block;} #####Css 代码： `.list_images { position: relative; width: 1000px; margin: 0 auto; text-align: center; } .content { margin-left: 26px; margin-top:18px; margin-bottom: 1%; height: 200px; width: 30%; position: relative; cursor: pointer; display: inline-block; box-shadow: 0px 3px 3px 0px rgb(0,0,0,0.05); } h3 { position: relative; color: #484848; font-size: 16px; font-weight: bold; left: 0px; } p { position: relative; left: -10px; color: #aaaaaa; font-size: 12px; } .mask { height: 100%; width: 100%; position: absolute; top: 0px; display: none; background-color: rgba(0, 0, 0, 0.5); color: #EEEEEE; font-size: 20px; } .mask_title { font-size:16px; margin-top: 20%; text-align: center; } .mask_btn { display: inline-block; text-decoration: none; color: #eee; width: 100px; height: 28px; line-height: 28px; font-size: 14px; text-align: center; border-radius: 14px; background: #5691fe; list-style: none; cursor: pointer; margin-top: 20px; } .content:hover .mask {display: block;}` ####效果图  ***----------------------------------------------------------------------------------------------------*** 
