我的同事写了一些 CSS 来在图像上放置一个带有透明背景的小 PNG 箭头。但是，他将其应用于锚标记的 :after 伪元素。
这适用于除 IE8 之外的所有现代浏览器。他声称这在 IE8 中有效，但我们都无法弄清楚为什么这不再有效。
HTML
<html>
<head>
<title>IE8 PNG transparency test with :after</title>
</head>
<body>
<div id="channel-feat-lists" class="feat-lists feat-stories is-invisible mod with-border">
<h4>TOP 3 STORIES</h4>
<ul class="tout-stack">
<li id="c1" class="tout">
<div class="tout-image size-160x165"><a href="#" class="video-link"><img src="http://img4.realsimple.com/images/home-organizing/decorating/0812/boy-tunnel-fort-ictcrop_160.jpg"
alt="#"
width="160"
height="165" /></a></div>
<h6><a href="#" class="has-number"><span class="tout-title-number">7 </span><span class="tout-title-remainder">Ideas for Kids' Forts</span></a></h6>
<div class="tout-dek">Want to create a fortress mighty enough to withstand any big bad wolf's huffs and puffs? Get inspired by these seven creations.</div>
<div class="tout-jump"><a class="jump">SEE MORE FUN VIDEOS</a></div>
</li>
<li id="c2" class="tout">
<div class="tout-image size-160x165"><a href="#"><img src="http://img4.realsimple.com/images/home-organizing/decorating/0812/boy-tunnel-fort-ictcrop_160.jpg"
alt="#"
width="160"
height="165" /></a></div>
<h6><a href="#" class="has-number"><span class="tout-title-number">8 </span><span class="tout-title-remainder">Ideas for Kids' Forts</span></a></h6>
<div class="tout-dek">Want to create a fortress mighty enough to withstand any big bad wolf's huffs and puffs? Get inspired by these seven creations.</div>
<div class="tout-jump"><a class="jump" href="#">SEE MORE FUN VIDEOS</a></div>
</li>
<li id="c3" class="tout">
<div class="tout-image size-160x165"><a href="#"><img src="http://img4.realsimple.com/images/home-organizing/decorating/0812/boy-tunnel-fort-ictcrop_160.jpg"
alt="#"
width="160"
height="165" /></a></div>
<h6 class="has-no-number"><a href="#">Example numberless title</a></h6>
<div class="tout-dek">Want to create a fortress mighty enough to withstand any big bad wolf's huffs and puffs? Get inspired by these seven creations.</div>
<div class="tout-jump"><a class="jump" href="#">SEE MORE FUN VIDEOS</a></div>
</li>
<li id="c4" class="tout">
<div class="tout-image size-160x165"><a href="#"><img src="http://img4.realsimple.com/images/home-organizing/decorating/0812/boy-tunnel-fort-ictcrop_160.jpg"
alt="#"
width="160"
height="165" /></a></div>
<h6><a href="#" class="has-number"><span class="tout-title-number">8 </span><span class="tout-title-remainder">Ideas for Kids' Forts</span></a></h6>
<div class="tout-dek">Want to create a fortress mighty enough to withstand any big bad wolf's huffs and puffs? Get inspired by these seven creations.</div>
<div class="tout-jump"><a class="jump" href="#">SEE MORE FUN VIDEOS</a></div>
</li>
</ul>
</div>
</body>
</html>
CSS
.feat-lists .tout { min-height: 165px; margin-top: 14px; }
.feat-lists .tout + .tout { border-top: 1px dotted #7f7f7f; padding-top: 14px; }
.feat-lists .tout-image { float: left; margin-left: 7px; }
.feat-lists .tout-image a { display: block; position: relative; }
.feat-lists .video-link:after { background: transparent url('http://img4.realsimple.com/static/i/play-overlay.png') 0 0; content: ''; height: 24px; left: 70px; position: absolute; top: 70px; width: 19px; }
.feat-lists h6 { margin-left: 181px; }
.feat-lists h6 a { color: #333333; font: normal 1.8em Georgia, sans-serif; }
.feat-lists h6 a.has-number:hover { text-decoration: none; }
.feat-lists h6 a.has-number:hover .tout-title-remainder { text-decoration: underline; }
.feat-lists .tout-title-number { color: #999999; display: block; font: normal 2.777em Georgia, sans-serif; margin-bottom: -4px; position: relative; top: -6px; } /* 2.777 x 1.8 = 5 = 50px */
.feat-lists .tout-dek { color: #666666; font: normal 1.3em Georgia, sans-serif; margin: 5px 0px 5px 181px; }
.feat-lists .tout-jump { margin-left: 181px; }
.feat-lists h6.has-no-number { padding: 2.5em 0 0 0; }
这是 JSFiddle 版本：http: //jsfiddle.net/tangst/gByMb/
第一个图像应该具有该叠加层。
我在 IE8 的 PNG 透明度问题中尝试了一些解决方案，但它们不起作用。
有没有人遇到过这个？