crmeb_shop/template/admin/src/theme/loading.scss

.loading-prev {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2;
  background-color: var(--prev-bg-white);
}
.loading-prev .loading-prev-box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.loading-prev .loading-prev-box-warp {
  width: 80px;
  height: 80px;
}
.loading-prev .loading-prev-box-warp .loading-prev-box-item {
  width: 33.333333%;
  height: 33.333333%;
  background: var(--prev-color-primary);
  float: left;
  animation: loading-prev-animation 1.2s infinite ease;
  border-radius: 1px;
}
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(7) {
  animation-delay: 0s;
}
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(4),
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(8) {
  animation-delay: 0.1s;
}
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(1),
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(5),
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(9) {
  animation-delay: 0.2s;
}
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(2),
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(6) {
  animation-delay: 0.3s;
}
.loading-prev .loading-prev-box-warp .loading-prev-box-item:nth-child(3) {
  animation-delay: 0.4s;
}
@keyframes loading-prev-animation {
  0%,
  70%,
  100% {
    transform: scale3D(1, 1, 1);
  }
  35% {
    transform: scale3D(0, 0, 1);
  }
}