/** loading **/
@-moz-keyframes loading {
  0% {
    -moz-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@-webkit-keyframes loading {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@keyframes loading {
  0% {
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

.loading {
  display: flex;
  justify-content: center;
  align-items: center;
}

.loading-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid #eee;
  border-left-color: #aaa;
  border-radius: 50%;
  -moz-animation: loading 0.9s infinite linear;
  -webkit-animation: loading 0.9s infinite linear;
  animation: loading 0.9s infinite linear;
}

.loading-tip {
  display: block;
  margin: 0 auto;
}