代码：

<style>
a{
    font-family:Arial, Helvetica, sans-serif;
    font-size:0.8em;
    text-align:center;
    margin:3px;
}
a:link,a:visited{
    color:#A62020;
    padding:4px 10px 4px 10px;
    background-color:#ecd8db;
    text-decoration:none;
    border-top:1px solid #EEEEEE;
    border-left:1px solid #EEEEEE;
    border-bottom:1px solid #717171;
    border-right:1px solid #717171;

}
a:hover{
    color:#821818;
    padding:5px 8px 3px 12px;
    background-color:#e2c4c9;
    border-top:1px solid #717171;
    border-left:1px solid #717171;
    border-bottom:1px solid #EEEEEE;
    border-right:1px solid #EEEEEE


}


</style>

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效果：

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