#imBtn {
  position: fixed;
  right: 20px;
  bottom: 110px;
  width: 80px;
  height: 95px;
  font-size: 13px;

  color: #a49d8c;
  border: 1px solid #e8e3d3;
  background: #f9f8f2;
  cursor: pointer;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#imBtn .imgIcon-kefu {
  display: inline-block;
  margin-bottom: 8px;

  width: 30px;
  height: 30px;
  background: url('../../images/im/kefu.png') no-repeat 0 0;
  background-size: cover;
}

#imBtn:hover {
  color: #f4be49;
}

#imBtn:hover .imgIcon-kefu {
  background-image: url('../../images/im/kefu-light.png');
}