css3 实现图片遮罩效果,hover出现文字 - html/css语言

  鼠标hover 以后。图片上面出现一个遮罩, 透明度变化,  显示设置好的文字的文字,完全使用css 实现,下图是效果     关键代码   [html]   .featured-image:hover {       opacity: 0.9;       color: #fff;       background: rgba(0,0,0,0.8);   }   看 源码吧 [ html]   <!doctype html>   <html>   <head>   <meta charset="utf-8">   <title>无标题文档</title>   <style>      #content article {       float: left;       margin-right: 4%;       max-width: 236px;       position: relative;       width: 22%;       margin-bottom: 3.5%;   }   #content article:nth-child(4n+4) {       margin-right: 0;   }   .post-format-content {       position: relative;       background: #111;   }   .post-thumbnail {       max-width: 100%;       height: auto;       overflow: hidden;   }   .content-wrap {       padding: 0;       position: absolute;       text-align: center;       width: 100%;       top: 0;       bottom: 0;       display: table-cell;       vertical-align: middle;       overflow: hidden;   }   .content-wrap h1.entry-title {       display: table;       font-size: 110%;       height: 100%;       text-transform: uppercase;       width: 100%;       margin:0;   }   .edit-link {       z-index: 2;   }   .featured-image {       display: table-cell;       position: relative;       transition: opacity .25s ease-in-out, background .25s ease-in-out;       -moz-transition: opacity .25s ease-in-out, background .25s ease-in-out;       -webkit-transition: opacity .25s ease-in-out, background .25s ease-in-out;       vertical-align: middle;       z-index: 1;       color: #fff;       text-decoration: none;       opacity: 0;       padding: 10%;   }   .featured-image:hover {       opacity: 0.9;       color: #fff;       background: rgba(0,0,0,0.8);   }   .post-thumbnail img {       display: block;   }   img {       max-width: 100%;       height: auto;   }      </style>   </head>      <body>   <div id="content">      <article  class="post-152 post type-post status-publish format-standard hentry category-people category-photos">     <div class="post-format-content">       <div class="post-thumbnail"> <img width="480" height="640" src="assets/img/1.jpg" class="attachment-thumbnail wp-post-image" alt="105694702"> </div>       <div class="content-wrap">         <h1 class="entry-title"><a href="" class="featured-image" rel="bookmark">Music & Fashion</a></h1>       </div>     </div>   </article>   <article  class="post-152 post type-post status-publish format-standard hentry category-people category-photos">     <div class="post-format-content">       <div class="post-thumbnail"> <img width="480" height="640" src="assets/img/2.jpg" class="attachment-thumbnail wp-post-image" alt="105694702"> </div>       <div class="content-wrap">         <h1 class="entry-title"><a href="" class="featured-image" title="amp; Fashion" rel="bookmark">Music & Fashion</a></h1>       </div>     </div>   </article>   </div>   </body>   </html>    
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