body {
  font-size: 16px;
  line-height: 1.7;
  color: #111;
  font-family: "Noto Sans JP", sans-serif;
  background-color: #fafafa;
}

@media screen and (min-width: 768px) {
  .hidden-pc {
    display: none;
  }
}

@media not screen and (min-width: 768px) {
  .hidden-sp {
    display: none;
  }
}

.logo {
  height: 88vh;
  margin: 0 auto;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  position: relative;
}
@media not screen and (min-width: 768px) {
  .logo {
    height: 85vh;
  }
}

.logo__image {
  width: 263px;
}
@media not screen and (min-width: 768px) {
  .logo__image {
    width: 50%;
    max-width: 263px;
  }
}
@media screen and (min-width: 1920px) {
  .logo__image {
    width: 13.6979%;
  }
}

.mail__button {
  position: fixed;
  bottom: 50px;
  right: 50px;
  width: 70px;
}
@media not screen and (min-width: 768px) {
  .mail__button {
    position: fixed;
    bottom: 3.2%;
    right: 6.25%;
    width: 50px;
  }
}

@media (hover: hover) {
  .mail__button:hover {
    -webkit-transform: translateY(-20px);
            transform: translateY(-20px);
  }
}