支持拆分书写
/* Gecko browsers */
-moz-border-radius-topleft: 20px;
-moz-border-radius-topright: 0;
-moz-border-radius-bottomleft: 0;
-moz-border-radius-bottomright: 20px;
/* Webkit browsers */
-webkit-border-top-left-radius: 20px;
-webkit-border-top-right-radius: 0;
-webkit-border-bottom-left-radius: 0;
-webkit-border-bottom-right-radius: 20px;
/* W3C syntax */
border-top-left-radius: 20px;
border-top-right-radius: 0;
border-bottom-right-radius: 0;
border-bottom-left-radius: 20px;

<div id="round"></div>
#round {
padding:10px; width:300px; height:50px;
background:#FC9;
-moz-border-radius: 15px;
-webkit-border-radius: 15px;
border-radius:15px;
}

/* Gecko browsers */
-moz-border-radius: 5px;
/* Webkit browsers */
-webkit-border-radius: 5px;
/* W3C syntax - likely to be standard so use for future proofing */
border-radius:10px;
order-radius:5px 15px 20px 25px;
前缀-moz(例如 -moz-border-radius)用于Firefox-webkit(例如:-webkit-border-radius)用于Safari和Chrome。例1<div id="round"></div>#round {
padding:10px; width:300px; height:50px;
border: 5px solid #dedede;
-moz-border-radius: 15px; /* Gecko browsers */
-webkit-border-radius: 15px; /* Webkit browsers */
border-radius:15px; /* W3C syntax */
}