CSS3之尖角标签

<p>
    <a>Tag1</a>
    <a>Tag2</a>
    <a>Tag3</a>
    <a>Tag4</a>
</p>

a{
    dispaly:inline-block;
    position:relative;
    background:#ccc;
    color:green;
    line-height:1em;
    margin:0 10px;
    padding:3px;
}
a:before{
    position:absolute;
    content:"";
    width:0;
    height:0;
    border:transparent 0.74em solid;
    border-right-color:#ccc;
    top:0;
    left:-1.4em
    
}