@charset "utf-8";
.mainlogo{
  background-image : url(../img_top/logo1.png);
  background-repeat : no-repeat;
  background-position : center center;
  width : 980px;
  height : 277px;
  text-align : center;
  margin-top : -307px;
  z-index : 2;
  position : relative;
}