body {
  background: url("../image/dx-expoAutTokyo/sp_mv_img.jpg") top center no-repeat;
  background-size: cover;
}
@media screen and (min-width: 768px) {
  body {
    background: url("../image/dx-expoAutTokyo/mv_img.jpg") top center no-repeat;
    background-size: cover;
  }
}

@media screen and (min-width: 768px) {
	.p-product--2 .p-product__img{
		width: 50%;
	}
}