.clear{clear:both;}

/* tab */
.tab{width:960px;}
.tab .tab_pic ul{height:400px;width:999em;position:relative;}
.tab .tab_pic ul li{float:left;}
.tab .tab_pic ul li a{display:block;}
.tab_pic{width:960px;height:400px;overflow:hidden;position:relative;}
.tab_txt{width:960px; padding:30px 0px;}
.tab .tab_pic .prev,.tab .tab_pic .next{display:block;width:40px;height:40px;float:left;margin-top:180px;overflow:hidden;cursor:pointer;background:url(../../imgs/sn/l1.png) no-repeat left top; }
.tab .tab_pic .next{ background:url(../../imgs/sn/r1.png) no-repeat left top; width:40px; height:40px; float:right; }
.tab .tab_txt ul{position:relative;}
.tab .tab_txt ul li{width:910px;padding:50px 35px;float:left;}
.tab_san{display:block;width:17px;height:34px;position:absolute;top:29px;right:0;}
.btn_bg{width:960px;height:400px;display:block;position:absolute;left:0;bottom:0;z-index:1;display:block;}
.btn_ct{width:960px;height:400px;padding:1px;display:block;position:absolute;left:0;bottom:0;z-index:2;}