.concept_main {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 1280px;
  aspect-ratio: 1289/841;
  height: auto;
  margin: 0 auto;
  margin-bottom: 120px;
  background-image: url(../images/concept_bg1.png);
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  padding: 60px 40px 0 0;
}

.concept_title {
  font-size: 32px;
  font-weight: 500;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
  color: #495476;
  position: relative;
}
.concept_title::before, .concept_title::after {
  display: block;
  position: absolute;
  content: "";
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
}
.concept_title::before {
  width: 168px;
  aspect-ratio: 168/117;
  top: 50%;
  right: 100%;
  transform: translateY(-50%);
  background-image: url(../images/concept_title1.png);
}
.concept_title.sub::before {
  top: 45%;
  width: 140px;
  background-image: url(../images/concept_title3.png);
}
.concept_title::after {
  width: 99px;
  aspect-ratio: 99/139;
  top: 50%;
  left: 98%;
  transform: translateY(-56%);
  background-image: url(../images/concept_title2.png);
}
.concept_title.sub::after {
  left: 105%;
  transform: translateY(-50%);
  background-image: url(../images/concept_title4.png);
}

.concept_movie {
  display: block;
  width: 100%;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
  aspect-ratio: 1920/1080;
  height: auto;
  overflow: hidden;
  position: relative;
}
.concept_movie iframe {
  display: block;
  height: 100%;
  width: 100%;
  border-radius: 26px;
}
.concept_movie .play_button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 14.72%;
  aspect-ratio: 110/75;
  height: auto;
  cursor: pointer;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-image: url(../images/icon_saisei_btn.svg);
  transition: background-color 0.3s;
  border-radius: 17px;
  overflow: hidden;
  border: solid 1px #fff;
}
.concept_movie .play_button:hover {
  background-color: rgba(255, 255, 255, 0.2196078431);
}

.concept_bg2 {
  display: block;
  position: absolute;
  width: 100%;
  max-width: 1280px;
  aspect-ratio: 1270/139;
  height: auto;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background-image: url(../images/concept_bg2.png);
  background-size: contain;
  background-position: bottom center;
  background-repeat: no-repeat;
}

@media (max-width: 1200px) {
  .concept_title {
    font-size: 28px;
  }
  .concept_title::before {
    width: 130px;
  }
  .concept_title.sub::before {
    width: 100px;
  }
  .concept_title::after {
    width: 70px;
  }
  .concept_movie .play_button {
    border-radius: 12px;
  }
}

@media (max-width: 960px) {
  .concept_movie iframe {
    border-radius: 12px;
  }
  .concept_movie {
    border-radius: 12px;
  }
}

@media (max-width: 767px) {
  .concept_main {
    padding: 30px 10px 0 0;
    transform: scale(1.1);
    margin-bottom: 80px;
  }
  .concept_title {
    font-size: 16px;
    letter-spacing: -0.3px;
    margin-bottom: 20px;
  }
  .concept_title::before {
    width: 50px;
  }
  .concept_title.sub::before {
    width: 46px;
  }
  .concept_title::after {
    width: 36px;
  }
  .concept_movie iframe {
    border-radius: 8px;
  }
  .concept_movie {
    border-radius: 8px;
  }
}