.zan-switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 32px;
  vertical-align: middle;
  box-sizing: border-box;
  border-radius: 16px;
  background: #44DB5E;
  border: 1px solid #44DB5E;
}
.zan-switch__circle {
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 30px;
  display: inline-block;
  background: #fff;
  border-radius: 15px;
  box-sizing: border-box;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1), 0 3px 1px 0 rgba(0, 0, 0, 0.05), 0 2px 2px 0 rgba(0, 0, 0, 0.1), 0 3px 3px 0 rgba(0, 0, 0, 0.05);
  transition: transform 0.35s cubic-bezier(0.45, 1, 0.4, 1);
  z-index: 2;
}
.zan-switch__bg {
  position: absolute;
  top: -1px;
  left: -1px;
  width: 52px;
  height: 32px;
  background: #fff;
  border-radius: 26px;
  display: inline-block;
  border: 1px solid #e5e5e5;
  box-sizing: border-box;
  transition: transform 0.35s cubic-bezier(0.45, 1, 0.4, 1);
  transform: scale(0);
  transform-origin: 36px 16px;
}
.zan-switch--on .zan-switch__circle {
  transform: translateX(20px);
}
.zan-switch--off .zan-switch__bg {
  transform: scale(1);
}
.zan-swtich--disabled {
  opacity: 0.4;
}
.zan-switch__loading {
  position: absolute;
  left: 7px;
  top: 7px;
  width: 16px;
  height: 16px;
  background: url(https://img.yzcdn.cn/public_files/2017/02/24/9acec77d91106cd15b8107c4633d9155.png) no-repeat;
  background-size: 16px 16px;
  animation: zan-switch-loading 0.8s infinite linear;
}

@keyframes zan-switch-loading {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}