#Download{width: 830px;height: 98px;text-align:center;position:absolute;top: 180px;left:50%;margin-left: -403px;z-index:51;border-radius:5px;}
#Download .btn_down_s1{float:left;width: 345px;height: 98px;text-indent:-999em;margin-right: 152px;animation: sc 2s infinite linear;background:url(../mafa2/a1.png) no-repeat left top;}
#Download .btn_down_s2{float:left;width: 345px;height: 98px;text-indent:-999em;margin-left: -15px;animation: sc 2s infinite linear;background:url(../mafa2/a2.png) no-repeat left top;}