#downloadb{width:1280px;height:121px;position:absolute;top:70px;left:50%;margin-left:-950px;z-index:1500;}

/*下载*/


#downloadab .btn_downa{float:left;width:254px;height:268px;;position:relative;text-indent:-9999em;background:url("btn-1.png"/*tpa=http://sf302.cn:88/26/711/style3/btn-1.png*/) no-repeat left bottom;display:block;}



#downloadc{width:1280px;height:121px;position:absolute;top:25px;left:50%;margin-left:610px;z-index:1500;}

/*下载*/


#downloadac .btn_downa{float:left;width:400px;height:400px;;position:relative;text-indent:-9999em;background:url("2.gif"/*tpa=http://sf302.cn:88/26/711/style3/2.gif*/) no-repeat left bottom;display:block;}