.secene {
  display: flex;
  flex-direction: column;
  position: relative;
  height: 100%;
}
.secene__ttl {
  position: relative;
  margin: 0 0 18.75%;
  padding-top: 38.75%;
  font-weight: normal;
  background: url(../images/common/deco/deco__box.svg) no-repeat center/contain;
}
.secene__ttl span {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  font-family: "BMEULJIRO", sans-serif;
  font-size: calc(3rem + 2 * (100vw - 320px) / 767);
  text-align: center;
  line-height: 1.2;
  transform: translate(-50%, -50%);
}
.secene__letter {
  position: relative;
  display: block;
  width: 59.375%;
  margin: 0 auto;
  padding-top: 44.687%;
  background: url(../images/index/index__letter.svg) no-repeat center/contain;
}
.secene__letter::after {
  position: absolute;
  bottom: -45%;
  left: 40%;
  width: 51.547%;
  padding-top: 66.773%;
  background: url(../images/index/index__finger.svg) no-repeat center/contain;
  animation: fadeInAndMove 2s 500ms both cubic-bezier(0.4, 0, 0.2, 1), finger 500ms 2s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
  content: "";
}
.secene__letter.fade-in {
  animation: fadeInAndMove 2s both cubic-bezier(0.4, 0, 0.2, 1);
}
.secene__letter-content {
  padding-top: 6vh;
}
.secene__start-btn {
  margin: 3rem auto 0;
}

.fade-in {
  animation: fadeIn 1s both;
}

.fade-out {
  animation: fadeOut 500ms both;
}

@keyframes fadeInAndMove {
  0% {
    opacity: 0;
    transform: translateY(50%);
  }
  100% {
    opacity: 1;
    transform: translateY(0%);
  }
}
@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fadeOut {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes finger {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(0.96);
  }
}
.key {
  margin: auto auto 0;
}