.concept-fv {
  margin: 0 auto;
  padding: 0;
  text-align: center;
  max-width: 375px;
  width: 100%;
}

.concept-fv img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
}

/* 基本のセクションテキスト */
.section-text {
  max-width: 300px;
  font-family: "Noto Serif JP", serif;
  font-weight: 400;
  line-height: 1.6;
}

.size-14 {
  font-size: 0.875rem;
}

.size-18 {
  font-size: 1.125rem;
}

.size-24 {
  font-size: 1.5rem;
}

/* バリアセクション */
.barrier {
  background-image: url("../images/kakusitusou.png");
  background-size: contain;
  background-position: 10px 0;
  background-repeat: no-repeat;
  height: 775px;
  max-width: 335px;
  margin: 0 auto 0;
  padding: 0 20px 0;
  display: flex;
  flex-direction: column;
}

.barrier h2 {
  font-family: "Noto Serif JP", serif;
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 24px;
  text-align: center;
  border-bottom: 1px solid #535972;
  display: inline-block;
  padding-bottom: 8px;
  width: auto;
  line-height: 1.4;
}

.barrier p {
  font-size: 0.875rem;
  text-align: left;
  line-height: 1.6;
  margin-top: 400px;
}

/* cellsセクション */
.cells {
  background: url("../images/kakusitusuibun.png") center bottom/contain no-repeat;
  height: 775px;
  max-width: 335px;
  margin: 0 auto 40px;
  padding: 40px 20px;
}

.cells-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 400;
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px solid #535972;
  display: inline-block;
  padding-bottom: 8px;
  width: 300px;
  line-height: 1.4;
}

.cells p {
  font-size: 0.875rem;
  text-align: left;
  line-height: 1.6;
  margin-top: 480px;
}

/* cells-descriptionセクション */
.cells-description {
  background: url("../images/sukimaumeru.png") center/contain no-repeat;
  padding: 20px;
  min-height: 300px;
  margin-top: 80px;
  margin-bottom: 40px;
  text-align: center;
  max-width: 335px;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.cells-desc-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 400;
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px solid #535972;
  display: inline-block;
  padding-bottom: 8px;
  width: 300px;
  line-height: 1.4;
}

.cells-description p {
  font-size: 0.875rem;
  width: 300px;
}


/* storyセクション */
.story {
  background: url("../images/okunohanasi.png") center top/contain no-repeat;
  background-size: 335px;
  padding: 40px 20px;
  text-align: center;
  max-width: 335px;
  margin: 0 auto 40px;
}

.story-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 400;
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px solid #535972;
  display: inline-block;
  padding-bottom: 8px;
  width: 300px;
  line-height: 1.4;
}

.story p {
  font-size: 0.875rem;
  text-align: left;
  line-height: 1.6;
  margin-bottom: 24px;
}

strong {
  font-weight: bold;
  color: #535972;
}

/* YouTubeチャンネルリンク */
.youtube-channel-link {
  text-align: center !important;
  margin: 24px 0 !important;
}

.youtube-channel-link a {
  color: #535972;
  text-decoration: none;
  font-size: 1rem;
}

.youtube-channel-link a:hover {
  color: #6a7a82;
}

.youtube-description {
  text-align: center !important;
  font-size: 0.875rem;
  margin: 32px auto 16px !important;
  padding: 0 20px;
}

/* YouTube動画 */
.youtube-video {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  margin-top: 24px;
}

.youtube-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
}