.buttonArea {
  display: flex;
  position: fixed;
  width: 100vw;
  height: 9.6rem;
  bottom: 0;
  background: #fff;
  z-index: 99;
}

.buttonArea>div {
  position: relative;
  flex: 1;
  text-align: center;
  background: #fff;
}

.buttonArea img {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  width: calc(150 / 750 * 100vw);
}

.index {
}

.demeanor {}

.video {}

.album {}

.guide {
}

.back {
    position: fixed;
    top: 0;
    padding: 3rem;
    background-color: rgba(210,206,206,0.3);
        z-index: 99;
}