.wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.icon-wrap {
  position: relative;
}

#btn {
  position: relative;
  z-index: 10;
  display: inline-block;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  font-size: 1.5em;
  font-weight: bold;
  font-family: Arial;
  line-height: 2em;
  padding: 0 1.5em;
  background: #D11;
  color: #FFF;
  border-radius: .5em;
  box-shadow: 0 6px 0 #A33, 0 1px 0 #A33, 0 0 10px rgba(0, 0, 0, .1) inset, 0 0 15px rgba(0, 0, 0, .1);
  text-shadow: 0 -1px 0 rgba(0, 0, 0, .3);
  transition: .3s ease;
  outline: none;
}

#btn:active {
  box-shadow: 0 2px 0 #A33, 0 0 10px rgba(0, 0, 0, .2) inset, 0 0 35px rgba(0, 0, 0, .2);
  -webkit-transform: translate(0, 4px);
  transform: translate(0, 4px);
}

.icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) translateZ(0);
  z-index: 1;
  width: 50px;
  height: 50px;
  background-repeat: no-repeat;
  // background-color: red;
  background-size: contain;
  opacity: 1;
  transition: all 1s;
}

.icon-xing {
  background-image: url('./images/xing.png');
}

.icon-yue {
  background-image: url('./images/yue.png');
}

.icon-xin {
  background-image: url('./images/xin.png');
}