@media (max-width: 768px) {
  .carousel-inner .carousel-item > div {
    display: none;
  }
}

@media (max-width: 768px) {
  .carousel-inner .carousel-item > div:first-child {
    display: block;
  }
}

.carousel-inner .carousel-item.active, .carousel-inner .carousel-item-start, .carousel-inner .carousel-item-next, .carousel-inner .carousel-item-prev {
  display: flex;
}

/* display 4 */

@media (min-width: 768px) {
  .carousel-inner .carousel-item-right.active, .carousel-inner .carousel-item-next, .carousel-item-next:not(.carousel-item-start) {
    transform: translateX(25%) !important;
  }
}

@media (min-width: 768px) {
  .carousel-inner .carousel-item-left.active, .carousel-item-prev:not(.carousel-item-end), .active.carousel-item-start, .carousel-item-prev:not(.carousel-item-end) {
    transform: translateX(-25%) !important;
  }
}

@media (min-width: 768px) {
  .carousel-item-next.carousel-item-start, .active.carousel-item-end {
    transform: translateX(0) !important;
  }
}

@media (min-width: 768px) {
  .carousel-inner .carousel-item-prev, .carousel-item-prev:not(.carousel-item-end) {
    transform: translateX(-25%) !important;
  }
}

.carousel-item {
  position: relative;
  display: none;
  float: left;
  width: 100%;
  margin-right: -100%;
  padding-right: 10px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transition: transform .6s ease-in-out;
}

.carousel-item .card {
  margin: 20px;
}