#app-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
#app-loading .dot {
  position: relative;
  box-sizing: border-box;
  display: inline-block;
  width: 32px;
  height: 32px;
  font-size: 32px;
  transform: rotate(45deg);
  animation: animationRotate 1.2s infinite linear;
}
#app-loading .dot i {
  position: absolute;
  display: block;
  width: 14px;
  height: 14px;
  background-color: #1890ff;
  border-radius: 100%;
  opacity: 0.3;
  transform: scale(0.75);
  transform-origin: 50% 50%;
  animation: animationMove 1s infinite linear alternate;
}
#app-loading .dot i:nth-child(1) {
  top: 0;
  left: 0;
}
#app-loading .dot i:nth-child(2) {
  top: 0;
  right: 0;
  animation-delay: 0.4s;
}
#app-loading .dot i:nth-child(3) {
  right: 0;
  bottom: 0;
  animation-delay: 0.8s;
}
#app-loading .dot i:nth-child(4) {
  bottom: 0;
  left: 0;
  animation-delay: 1.2s;
}
@keyframes animationRotate {
  to {
    transform: rotate(405deg);
  }
}
@keyframes animationMove {
  to {
    opacity: 1;
  }
}