#youtube_area {
  position: fixed;
  top: 0px;
  left: 0px;
  z-index: 14500;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.8);
}
#youtube_close {
  line-height: 0.3em;
  position: absolute;
  top: 0;
  right: 0;
  font-size: 10vw;
  padding: 1%;
  color: rgba(255, 255, 255, 1.00);
  cursor: pointer;
}
#youtube_02 {
  width: 60%;
  aspect-ratio: 16 / 9;
}
#youtube_02 iframe {
  width: 100%;
  height: 100%;
}
.twitter_txt {
  display: none;
}
#page-header .share_area h3.title {
  opacity: 0;
}
#top_area #staffcast_area ul.music_list li .image {
  background: url(../images/top/music_op_img02.jpg) no-repeat;
}
#top_area #staffcast_area ul.music_list li.ed .image {
  background: url(../images/top/music_ed_img02.jpg) no-repeat;
}
#top_area #introduction_area {
  background: #000 url(../images/top/intro_bg02.png) center top no-repeat;
  background-size: cover;
  height: 42.31vw;
}
@media screen and (min-width: 1360px) {
  #top_area #introduction_area {
    height: 585px;
  }
}
@media screen and (max-width: 750px) {
	#top_area #staffcast_area ul.music_list li .image {
  background-size: 42.3vw 42.3vw;
}
#top_area #staffcast_area ul.music_list li.ed .image {
  background-size: 42.3vw 42.3vw;
}
  #youtube_02 {
    width: 95%;
    aspect-ratio: 16 / 9;
  }
  #youtube_close {
    font-size: 30vw;
  }
  #top_area #introduction_area {
    height: 133.3vw;
  }
}