.btn__join a {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 80px;
  height: 330px;
  background-color: #C66E4E;
  border-radius: 0 9px 9px 0;
  color: #D9CA9C;
  font-size: 2.7rem;
  font-weight: 500;
  writing-mode: vertical-rl;
  position: fixed;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  transition: 0.3s;
  z-index: 999;
}

@media screen and (max-width: 767px) {
  .btn__join a {
    width: 53.3333333333vw;
    height: 12vw;
    line-height: 12vw;
    align-items: flex-end;
    border-radius: 0 0 1.3333333333vw 0;
    font-size: 4.5333333333vw;
    writing-mode: horizontal-tb;
    transform: none;
    top: 0;
  }
}

.btn__join a span {
  font-size: 1.8rem;
}

@media screen and (max-width: 767px) {
  .btn__join a span {
    font-size: 3.7333333333vw;
    margin: 0 0 -1.0666666667vw 1.0666666667vw;
    letter-spacing: 0.2666666667vw;
  }
}

@media (hover: hover) {
  .btn__join a:hover {
    opacity: 0.6;
  }
}

h2 {
  color: #998542;
  font-size: 3rem;
  font-weight: 500;
  text-align: center;
}

@media screen and (max-width: 767px) {
  h2 {
    font-size: 6.1333333333vw;
  }
}

p {
  font-size: 1.8rem;
  font-weight: 300;
}