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

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

@-webkit-keyframes loading-text-opacity {
  0% {
    opacity: 0; }
  20% {
    opacity: 0; }
  50% {
    opacity: 1; }
  100% {
    opacity: 0; } }

@keyframes loading-text-opacity {
  0% {
    opacity: 0; }
  20% {
    opacity: 0; }
  50% {
    opacity: 1; }
  100% {
    opacity: 0; } }

.mask {
  position: fixed;
  background-color: black;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 999999;
  text-align: center; }
  .mask .loading {
    height: 100px;
    width: 100px;
    border-radius: 100%;
    border: 2px solid transparent;
    border-color: transparent #fff transparent #fff;
    -webkit-animation: rotate-loading 1.5s linear 0s infinite normal;
            animation: rotate-loading 1.5s linear 0s infinite normal;
    -webkit-transform-origin: 50% 50%;
            transform-origin: 50% 50%;
    position: relative;
    margin: 40px auto; }
  .mask .loading-text {
    -webkit-animation: loading-text-opacity 2s linear 0s infinite normal;
            animation: loading-text-opacity 2s linear 0s infinite normal;
    color: #ffffff;
    opacity: 0;
    margin-top: -100px;
    font-size: 12px; }