@font-face {
  font-family: Main;
  src: url(../fonts/main.woff2) format("woff2"), url(../fonts/main.woff) format("woff");
}
* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
img {
  width: 100%;
  display: block;
}
.app {
  width: 100%;
  height: 100vh;
  position: relative;
  background-image: url(../image/na_bg_1.jpg);
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
}
.bg-revert {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-transition: all ease 1s;
  transition: all ease 1s;
  opacity: 0;
  background-image: url(../image/na_bg_2.jpg);
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
}
.bg-revert_show {
  opacity: 1;
}
.logo {
  width: 16%;
  position: absolute;
  top: 1%;
  left: 43%;
}
.quest {
  width: 24%;
  position: absolute;
  top: 25%;
  left: 39%;
}
.button {
  width: 20%;
  bottom: 15%;
  position: absolute;
  -webkit-animation: button 1s ease;
  animation: button 1s ease;
  -webkit-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
}
.b1 {
  left: 20%;
}
.b2 {
  left: 60%;
}
.overlay {
  display: block;
  width: 50%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.overlay-right {
  left: 50%;
}
@-webkit-keyframes button {
  from {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  50% {
    -webkit-transform: scale(1.1);
    transform: scale(1.1);
  }
  to {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}
@keyframes button {
  from {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  50% {
    -webkit-transform: scale(1.1);
    transform: scale(1.1);
  }
  to {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}
@-webkit-keyframes notice-in {
  from {
    opacity: 0;
    -webkit-transform: translateY(-20%);
    transform: translateY(-20%);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}
@keyframes notice-in {
  from {
    opacity: 0;
    -webkit-transform: translateY(-20%);
    transform: translateY(-20%);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}