CSS+DIV 设置圆角边框加阴影效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title> 无标题文档</title>
<style type="text/css">

</style>
</head>

<body >
<div class="test">1231231231</div>
</body>
</html>