.sd-nav{background:url(../images/sd-bg.gif) repeat-x;}
.sd-w960{width:960px;margin:0 auto;}
#box.sd-mt20{margin-top:20px;}
.sd-top{background:#fff;}
.sd-banner{height: 361px;background: url(../images/sd_banner.jpg) no-repeat center 0;}
.sd-banner1{height: 361px;background: url(../images/sd_banner1.jpg) no-repeat center 0;}
.sd-banner2{height: 361px;background: url(../images/sd_banner2.jpg) no-repeat center 0;}