/* 固定ページの共通幅・書体・ナビを継承し、このページの強弱だけを指定。 */
/* introを画面上端から始め、固定MENUをその背景の上に重ねる。 */
body.about-page.has-persistent-desktop-nav { padding-top: 0; }
.about-page .standard-main { padding-block: 0; }
.about-page__section { padding-block: clamp(5rem, 10vw, 9rem); }
.about-page__section--intro {
  padding-top: calc(clamp(5rem, 10vw, 9rem) + 80px);
  background: #f5f7f6;
}
.about-page__section + .about-page__section:not(:last-child) { padding-bottom: 0; }
.about-page__section .standard-content { line-height: 2.1; }
.about-page__section h2 { font-size: 26px; }
.about-page__section--intro h1 { margin: 0 0 48px; font-family: var(--font-display); font-weight: 400; font-size: var(--about-title-size); line-height: 1.6; letter-spacing: 0.1em; }
.about-page__section--intro .about-page__copy {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1.5vw, 1.25rem);
  line-height: 2.25;
}
.about-page__copy p { margin-bottom: var(--about-paragraph-gap); }
.about-page__copy p:last-child { margin-bottom: 0; }
/* 同じ線画素材を不規則な間隔・角度で風に流れるように配置。 */
.about-page__visual { position: relative; width: 240px; height: 112px; margin-block: 0 48px; }
.about-page__leaves { display: block; width: 100%; height: 100%; }
.about-page__section--reason .standard-content {
  position: relative;
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--color-ink);
  border-radius: 12px;
  background: transparent;
  font-size: 15px;
  line-height: 1.95;
}
/* 穴を起点に枠の外へ伸びる栞。absoluteで本文の余白計算から外す。 */
/* リボンの基準となる11pxの箱を保ち、穴だけ別描画で拡大する。 */
.about-page__bookmark {
  position: absolute;
  top: 14px;
  right: 32px;
  width: 11px;
  height: 11px;
  border: 1px solid transparent;
  isolation: isolate;
  transform: rotate(14deg);
  pointer-events: none;
}
.about-page__bookmark::after {
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 50%;
  width: 19px;
  height: 19px;
  border: 1px solid #000;
  border-radius: 50%;
  background: #fff;
  transform: translate(-50%, -50%);
  content: "";
}
.about-page__bookmark::before,
.about-page__bookmark-front {
  position: absolute;
  bottom: 3px;
  background: #000;
  transform-origin: center bottom;
  clip-path: polygon(0 0, 100% 0, 70% 100%, 30% 100%);
}
.about-page__bookmark::before {
  left: 1px;
  width: 13px;
  height: 82px;
  transform: rotate(8deg);
  content: "";
}
.about-page__bookmark-front {
  left: -5px;
  width: 18px;
  height: 88px;
}
.about-page__bookmark-front::after {
  position: absolute;
  inset: 1px;
  background: #fff;
  clip-path: polygon(0 0, 100% 0, 66% 100%, 34% 100%);
  content: "";
}
.about-flow {
  width: min(calc(100% - 2 * var(--standard-outer-space)), 70rem);
  display: grid;
  gap: 0;
  margin: clamp(3.5rem, 7vw, 6rem) auto 0;
  padding: 0;
  list-style: none;
}
.about-flow li {
  position: relative;
  display: grid;
  grid-template-columns: 2rem 5rem minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  padding: 2rem 1rem;
}
.about-flow li + li::before {
  position: absolute;
  top: -0.5rem;
  left: 5.5rem;
  width: 1px;
  height: 1rem;
  background: var(--color-sky-muted);
  content: "";
}
.about-flow__number { font-family: var(--font-display); font-size: 24px; }
.about-flow__image { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: contain; }
.about-flow p { margin: 0; font-size: 16px; line-height: 1.8; overflow-wrap: anywhere; }
.about-flow li:last-child { background: var(--color-sky-pale); }
@media (min-width: 768px) {
  .about-page__section--participate .standard-inset { width: 100%; max-width: min(940px, calc(100% - 2 * var(--standard-outer-space))); }
  .about-page__section h2 { font-size: 32px; }
  .about-page__section--intro h1 { margin-bottom: 56px; font-size: max(38px, var(--about-title-size)); }

  .about-flow { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .about-flow li { grid-template-columns: 1fr; grid-template-rows: auto auto 1fr; justify-items: center; align-items: start; gap: 1.5rem; padding: 1.75rem 1rem; text-align: center; }
  .about-flow li + li::before { top: 6.25rem; left: -0.5rem; width: 1rem; height: 1px; }
}

/* SPは長文の読みやすさを保ちながら、行間と段落間をコンパクトにする。 */
@media (max-width: 767px) {
  .about-page__section--intro h1 { margin-bottom: 0; }
  .about-page__section--intro .about-page__copy { font-size: 16px; line-height: 2; }
  .about-page__section--participate .about-page__copy { font-size: 16px; line-height: 1.8; }
  .about-page__section--participate .about-page__copy p:not(:last-child) { margin-bottom: 1.3em; }
  .about-page__section--reason .standard-content { font-size: 14px; line-height: 1.8; padding-block: 24px; }
}

.about-page__copy .about-page__guide-link {
  color: var(--contact-error-color);
  font-weight: 700;
  text-decoration-thickness: 1px;
  transition: text-decoration-thickness 350ms ease;
}
/* 本文共通リンクと同じ、ホバー時に下線を太くする表現。 */
.about-page__copy .about-page__guide-link:hover { text-decoration-thickness: 2px; }
@media (prefers-reduced-motion: reduce) {
  .about-page__copy .about-page__guide-link { transition: none; }
}

.about-page__section--participate .about-page__photo {
  width: 100%;
  max-width: 900px;
  margin: 0 auto clamp(28px, 4vw, 48px);
}
.about-page__photo img { aspect-ratio: 3 / 1; object-fit: cover; }