#main{
  background: #ededed;
  border: none;
  padding-bottom: 72px;
}
.ttl_conte{
  text-align: center;
  margin-top: 280px;
}
.ttl_conte .ttl_en{
  font-size: 52px;
  font-weight: 200;
  letter-spacing: 0.35em;
  line-height: 1;
}
.ttl_conte .ttl_ja{
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.17em;
  line-height: 1;
  margin-top: 1em;
}

.outline_conte{
  width: 1000px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 100px;
  position: relative;
}
.nav_lists{
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 70px;
  text-align: center;
  gap: 30px;
}
.nav_lists .nav_list{
  width: 300px;
  cursor: pointer;
  transition: all 0.3s ease;
  opacity: 1;
}
.nav_lists .nav_list:hover{
  transition: all 0.3s ease;
  opacity: .5;
}

iframe {
  border-width: 0 !important;
  border-style: solid !important;
  border-color: transparent !important;
  border-image: initial !important;
  overflow: auto !important;
  -ms-overflow-style: none !important;
  scrollbar-width: none !important;
}

iframe::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.outline_iframe_wrapper{
  width: 100%;
  min-height: 1000px;
  position: relative;
}

.outline_iframe{
  width: 100%;
  min-height: 1000px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.outline_iframe.active{
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
  opacity: 1;
  position: absolute;
  animation: fadeIn 0.5s ease forwards;
}

.outline_iframe.hidden{
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 0;
  position: absolute;
  animation: fadeOut 0.5s ease forwards;
}

@media screen and (max-width: 1200px) {
  #main{
    padding-bottom: 6vw;
  }
  .ttl_conte{
    margin-top: 23.33vw;
  }
  .ttl_conte .ttl_en{
    font-size: 4.33vw;
  }
  .ttl_conte .ttl_ja{
    font-size: 1.66vw;
  }
  
  .outline_conte{
    width: 78.125vw;
    margin-top: 7.8125vw;
  }
  .nav_lists{
    margin-bottom: 5.468vw;
    gap: 2.343vw;
  }
  .nav_lists .nav_list{
    width: 23.437vw;
  }
  
}
@media screen and (max-width: 736px) {
  #main{
    padding-bottom: 13.06vw;
  }
  .ttl_conte{
    margin-top: 37.8vw;
  }
  .ttl_conte .ttl_en{
    font-size: 6.66vw;
  }
  .ttl_conte .ttl_ja{
    font-size: 2.66vw;
    letter-spacing: 0.2em;
  }
  .outline_conte{
    margin-top: 12.4vw;
  }
  .outline_iframe_wrapper{
    min-height: 600px;
  }
  .outline_iframe{
    min-height: 600px;
  }
  iframe {
    height: 600px !important;
  }

  .nav_lists{
    margin-bottom: 5.468vw;
    gap: 2.343vw;
  }
  .nav_lists .nav_list{
    width: 100%;
  }
}