css多行文本垂直居中

1. .outer {
display:table; width:578px; overflow:hidden;
background: #eee; height: 42px;
}
.middle {display:table-cell; vertical-align:middle; margin-left 10px;}

/*下面的CSS是针对IE7，IE6*/<!--[if lte IE 7]>
<style>
.outer{position:relative;}
.middle{position: absolute; top: 50%;}
.inner{position: relative; top:-50%}
</style>
<![endif]-->

2.(ie8+) .outer{
height: 271px;
line-height: 271px;
font-size: 0px;
}
#special-price .special-price-content .content li .mask p {
font-size: 16px;
line-height: 1.5;
display: inline-block;
vertical-align: middle;
}