#about_cover,
#view,
#view canvas,
body,
html {
  height: 100%;
  width: 100%;
}
#about,
#about_cover,
#bt_fs,
#ng,
.ok {
  display: none;
}
#about a,
#bt_about a,
#bt_backtrack a,
#bt_feedback a,
#bt_start a {
  color: #fff;
  text-decoration: none;
  border-bottom: dashed 1px #fff;
}
body,
html {
  position: absolute;
  overflow: hidden;
  text-align: center;
  background: rgb(56, 71, 71);
  color: #fff;
 
}
#about_cover,
#view {
  position: fixed;
  top: 0;
  z-index: 1;
}
#bt_back,
#bt_fs {
  position: absolute;
  z-index: 100;
  padding: 10px;
  left: 0;
  font-size: 1rem;
  cursor: pointer;
  transition: 0.2s ease;
}
#bt_fs {
  left: auto;
  right: 0;
}
#scene_main,
#scene_top {
  width: 90%;
}
#scene_loading {
  width: 100%;
}
#about,
#scene_loading,
#scene_main,
#scene_top {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  z-index: 100;
  display: none;
}
#scene_top h1 {
  font-size: 1.5rem;
  margin-bottom: 25px;
}
#bt_start {
  margin-bottom: 15px;
}
#scene_top .attention {
  font-size: 0.9rem;
  margin-top: 25px;
}
#scene_top .tit {
  margin-top: 20px;
  margin-bottom: 10px;
}
#scene_top .con {
  letter-spacing: -0.5rem;
}
#scene_top .sns {
  margin: 0 8px;
  cursor: pointer;
}
#scene_top .sns img {
  width: 40px;
}
#ng .atten {
  font-size: 0.9rem;
  margin-bottom: 20px;
}
#scene_loading hr {
  width: "0%";
}
#scene_main,
#scene_main .attention {
  pointer-events: none;
}
#bt_backtrack,
#bt_feedback {
  font-size: 0.9rem;
  margin-top: 20px;
  pointer-events: auto;
}
#about_cover {
  z-index: 900;
  background: #fff;
  opacity: 0.5;
}
#about {
  z-index: 1000;
  color: #fff;
  background: #8cc;
  max-width: 640px;
  letter-spacing: 0.2rem;
  line-height: 1.2;
  width: 100%;
}
#about_in {
  padding: 40px;
}
#bt_close {
  font-size: 2rem;
  cursor: pointer;
}
#about .close {
  margin-bottom: 30px;
}
#about .con {
  line-height: 1.7;
  margin-bottom: 20px;
}
#about .link {
  margin-top: 30px;
  margin-bottom: 10px;
  line-height: 1.5;
}
#bt_back:hover,
#bt_backtrack:hover,
#bt_close:hover,
#bt_feedback:hover,
#bt_fs:hover,
#scene_top .sns:hover,
a:hover {
  animation: animover 0.2s linear;
  -webkit-animation: animover 0.2s linear;
}
@keyframes animover {
  0.00% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-webkit-keyframes animover {
  0.00% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@media (max-width: 640px) {
  #scene_top h1 {
    font-size: 1.2rem;
    margin-bottom: 18px;
  }
  #bt_start,
  #scene_top .tit {
    margin-bottom: 10px;
  }
  #bt_about a,
  #bt_start a {
    font-size: 0.9rem;
  }
  #scene_top .attention {
    font-size: 0.6rem;
    margin-top: 18px;
  }
  #scene_top .tit {
    font-size: 0.9rem;
    margin-top: 20px;
  }
  #scene_top .con {
    letter-spacing: -0.5rem;
  }
  #scene_top .sns {
    margin: 0 8px;
  }
  #scene_top .sns img {
    width: 30px;
  }
  #ng .atten {
    font-size: 0.6rem;
    margin-bottom: 15px;
  }
  #bt_backtrack,
  #bt_feedback {
    font-size: 0.7rem;
  }
  #about_in {
    padding: 30px;
  }
  #bt_close {
    font-size: 1.8rem;
    cursor: pointer;
  }
  #about {
    letter-spacing: 0.1rem;
  }
  #about a {
    color: #fff;
    text-decoration: none;
    border-bottom: dashed 1px #fff;
  }
  #about .con,
  #about .link {
    font-size: 0.9rem;
  }
}