.fb__kakao {
  position: fixed;
  z-index: 10;
  bottom: 108px;
  right: 29px;
  width: 56px;
  height: 56px;
  background: #fae100;
  border-radius: 50%;
  box-shadow: 0 5px 10px 0 rgba(199, 206, 0, 0.15);
  text-align: center;
  transition: all 0.4s ease;
}
  
.fb__kakao:after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fae100 url(./ic_kakao.svg) no-repeat center center;
}
  
.fb__kakao__button {
  display: block;
  width: 140px;
  padding-left: 24px;
  text-align: left;
  opacity: 0;
}
  
.fb__kakao:hover {
  width: 134px;
  border-radius: 28px;
}
  
.fb__kakao:hover .fb__kakao__button {
  padding: 0 56px 0 20px;
  color: #231815;
  font-size: 16px;
  line-height: 56px;
  font-weight: 700;
  transition: opacity 0.2s ease 0.2s;
  opacity: 1;
}