.section-header{
background: url(/cdn/shop/files/main-2week004.jpg) 50% 50% no-repeat;
  background-size: cover;
  height: 450px;
  }
@media (max-width: 680px) {
.section-header{
background: url(/cdn/shop/files/main-2week005.jpg) 50% 50% no-repeat;
  background-size: cover;
  height: 250px;
  }
    }

@media (max-width: 860px) {
.o-week03 .yoko-sc > span:nth-child(2) {
  top: unset;
  bottom: 0px;
}
      }