css3实现图片遮罩效果鼠标hover以后出现文字

<!doctype html> 
<html> 
<head> 
<meta charset="utf-8"> 
<title>无标题文档</title> 
<style> 
#content article { 
float: left; 
margin-right: 4%; 
max- 236px; 
position: relative; 
 22%; 
margin-bottom: 3.5%; 
} 
#content article:nth-child(4n+4) { 
margin-right: 0; 
} 
.post-format-content { 
position: relative; 
background: #111; 
} 
.post-thumbnail { 
max- 100%; 
height: auto; 
overflow: hidden; 
} 
.content-wrap { 
padding: 0; 
position: absolute; 
text-align: center; 
 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; 
 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- 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> 
原文地址:https://www.cnblogs.com/SJP666/p/4728642.html