.carousel-item:nth-child(1) .bg-slide {
    background-image: url(../images/mv-pc01.jpg);
}
.carousel-item:nth-child(2) .bg-slide {
    background-image: url(../images/mv-pc02.jpg);
}
.carousel-item:nth-child(3) .bg-slide {
    background-image: url(../images/mv-pc03.jpg);
}
.carousel-item:nth-child(4) .bg-slide {
    background-image: url(../images/mv-pc04.jpg);
}
.carousel-item:nth-child(5) .bg-slide {
    background-image: url(../images/mv-pc05.jpg);
}
.carousel-item:nth-child(6) .bg-slide {
    background-image: url(../images/mv-pc06.jpg);
}
.carousel-item:nth-child(7) .bg-slide {
    background-image: url(../images/mv-pc07.jpg);
}
.carousel-item:nth-child(8) .bg-slide {
    background-image: url(../images/mv-pc08.jpg);
}
@media (max-width: 576px) {
  .carousel-item:nth-child(1) .bg-slide {
      background-image: url(../images/mv-sp01.jpg) !important;
  }
  .carousel-item:nth-child(2) .bg-slide {
      background-image: url(../images/mv-sp02.jpg) !important;
  }
  .carousel-item:nth-child(3) .bg-slide {
      background-image: url(../images/mv-sp03.jpg) !important;
  }
  .carousel-item:nth-child(4) .bg-slide {
      background-image: url(../images/mv-sp04.jpg) !important;
  }
  .carousel-item:nth-child(5) .bg-slide {
      background-image: url(../images/mv-sp05.jpg) !important;
  }
  .carousel-item:nth-child(6) .bg-slide {
      background-image: url(../images/mv-sp06.jpg) !important;
  }
  .carousel-item:nth-child(7) .bg-slide {
      background-image: url(../images/mv-sp07.jpg) !important;
  }
  .carousel-item:nth-child(8) .bg-slide {
      background-image: url(../images/mv-sp08.jpg) !important;
  }
}