css常用浮出层(tip效果)的写法

<div class="poptip">
<span class="poptip-arrow poptip-arrow-"><em>◆</em><i>◆</i></span>
<span class="poptip-arrow poptip-arrow-right"><em>◆</em><i>◆</i></span>
<span class="poptip-arrow poptip-arrow-bottom"><em>◆</em><i>◆</i></span>
<span class="poptip-arrow poptip-arrow-left"><em>◆</em><i>◆</i></span>
Hi，知道吗？
很快就疯抢了！
</div>

/ poptip /
.poptip{position: absolute;: 20px;left:20px;padding: 6px 10px 5px;padding: 7px 10px 4px;line-height: 16px;color: #DB7C22;font-size: 12px;background-color: #FFFCEF;border: solid 1px #FFBB76;border-radius: 2px;box-shadow: 0 0 3px #ddd;}
.poptip-arrow{position: absolute;overflow: hidden;font-style: normal;font-family: simsun;font-size: 12px;text-shadow:0 0 2px #c;}</p> <p>.poptip-arrow em,.poptip-arrow i{position: absolute;left:0;:0;font-style: normal;}
.poptip-arrow em{color: #FFBB76;}
.poptip-arrow i{color: #FFFCEF;text-shadow:none;}</p> <p>.poptip-arrow-,.poptip-arrow-bottom{height: 6px;width: 12px;left:12px;margin-left:-6px;}
.poptip-arrow-left,.poptip-arrow-right{height: 12px;width: 6px;: 12px;margin-:-6px;}</p> <p>.poptip-arrow-{: -6px;}
.poptip-arrow- em{: -1px;}
.poptip-arrow- i{: 0px;}</p> <p>.poptip-arrow-bottom{bottom: -6px;}
.poptip-arrow-bottom em{: -8px;}
.poptip-arrow-bottom i{: -9px;}</p> <p>.poptip-arrow-left{left:-6px;}
.poptip-arrow-left em{left:1px;}
.poptip-arrow-left i{left:2px;}</p> <p>.poptip-arrow-right{right:-6px;}
.poptip-arrow-right em{left:-6px;}
.poptip-arrow-right i{left:-7px;}