#splash {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  background-color: #5ac756;
  background-size: auto 100%;
  /* 高さを100%に固定し、幅は自動調整 */
  background-position: center;
  background-repeat: no-repeat;
  font-family: "Helvetica Neue", "Helvetica", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Arial", "Yu Gothic", "Meiryo", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

#splash img {
  width: 100px;
  height: 100px;
}

#splash .wrapper {
  position: relative;
  width: 200px;
  height: 10px;
  margin-top: 1rem;
}

#splash .circle {
  width: 20px;
  height: 20px;
  position: absolute;
  border-radius: 50%;
  background-color: #fff;
  left: 15%;
  transform-origin: 50%;
  animation: circle .5s alternate infinite ease;
}

@keyframes circle {
  0% {
    top: 60px;
    height: 5px;
    border-radius: 50px 50px 25px 25px;
    transform: scaleX(1.7);
  }

  40% {
    height: 20px;
    border-radius: 50%;
    transform: scaleX(1);
  }

  100% {
    top: 0%;
  }
}

#splash .circle:nth-child(5) {
  left: 45%;
  animation-delay: .2s;
}

#splash .circle:nth-child(6) {
  left: auto;
  right: 15%;
  animation-delay: .3s;
}

#splash .shadow {
  width: 20px;
  height: 4px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, .5);
  position: absolute;
  top: 62px;
  transform-origin: 50%;
  left: 15%;
  filter: blur(1px);
  animation: shadow .5s alternate infinite ease;
}

@keyframes shadow {
  0% {
    transform: scaleX(1.5);
    opacity: 1;
  }

  40% {
    transform: scaleX(1);
    opacity: .7;
  }

  100% {
    transform: scaleX(.2);
    opacity: .4;
  }
}

#splash .shadow:nth-child(2) {
  left: 45%;
  animation-delay: .2s
}

#splash .shadow:nth-child(3) {
  left: auto;
  right: 15%;
  animation-delay: .3s;
}

#splash span {
  font-size: 20px;
  letter-spacing: 12px;
  color: #fff;
  margin-top: 1rem;
}

.fade-out {
  opacity: 0;
  transition: opacity 1s ease-in;
  -webkit-transition: opacity 1s ease-in;
}

#animal_bg_01 {
  position: absolute;
  width: 200%;
  top: 0;
}

#animal_bg_02 {
  width: 160px;
  height: auto;
  position: absolute;
  top: 60%;
}