.site-loading {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: 0;
  line-height: 1;
  font-family: sans-serif;
}
.site-loading > .tip {
  margin: 6px 0 0;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: gray;
}
.site-loading > .spinner {
  width: 50px;
  height: 20px;
  margin: 0 auto;
}
.site-loading > .spinner > div {
  display: inline-block;
  width: 6px;
  height: 100%;
  margin: 0 2px;
  background-color: #29b8f2;
  animation: stretchdelay 1.2s infinite ease-in-out;
}
.site-loading > .spinner > .rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}
.site-loading > .spinner > .rect3 {
  -webkit-animation-delay: -1s;
  animation-delay: -1s;
}
.site-loading > .spinner > .rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}
.site-loading > .spinner > .rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}
@-webkit-keyframes stretchdelay {
  0%,
  100%,
  40% {
    -webkit-transform: scaleY(1);
  }
  20% {
    -webkit-transform: scaleY(1.6);
  }
}
@keyframes stretchdelay {
  0%,
  100%,
  40% {
    transform: scaleY(1);
    -webkit-transform: scaleY(1);
  }
  20% {
    transform: scaleY(1.6);
    -webkit-transform: scaleY(1.6);
  }
}