body{
	padding:0px;
	margin:0px;
	font-size:12px;
	color:#666;
	font-family:"微软雅黑";
	background:#fff;
	}
.nav{width:650px; margin:0px auto; height:410px; overflow:hidden; background-image:url(../images/mail_bg.jpg); background-position:bottom; background-repeat:no-repeat; margin-bottom:100px; }
.denglu{width:320px; height:150px; overflow:hidden; padding:155px 50px 105px 280px;}