.page-about {
  --about-soft: rgba(245, 241, 232, 0.06);
  --about-amber-soft: rgba(240, 178, 63, 0.08);
  --about-celadon-soft: rgba(114, 179, 160, 0.09);
  color: var(--paper);
}

.page-about .about-hero {
  padding: clamp(1.1rem, 3vw, 2rem) var(--gutter) clamp(2rem, 5vw, 3.8rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  margin-top: clamp(1.3rem, 3vw, 2.2rem);
}

.page-about .about-hero__kicker {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(2.15rem, 6.6vw, 4.9rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  color: var(--paper);
}

.page-about .about-hero__text {
  max-width: 46ch;
  margin: 1.35rem 0 0;
  font-size: clamp(1rem, 1.1vw, 1.06rem);
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .about-hero__seals {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.7rem;
}

.page-about .seal {
  display: inline-flex;
  flex-direction: column;
  gap: 0.22rem;
  min-width: 7.4rem;
  padding: 0.55rem 0.85rem 0.62rem;
  border: 2px solid var(--amber);
  background: var(--about-amber-soft);
  clip-path: var(--cut-corner);
}

.page-about .seal__num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .seal__label {
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.12em;
  color: var(--paper-dim);
}

.page-about .seal--celadon {
  border-color: var(--celadon);
  background: var(--about-celadon-soft);
}

.page-about .seal--celadon .seal__num {
  color: var(--celadon);
}

.page-about .about-figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
  box-shadow: var(--shadow-stamp);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  padding: 0.7rem 0.9rem 0.8rem;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--paper-dim);
}

.page-about .about-figure--method img {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure--map img {
  aspect-ratio: 14 / 9;
}

.page-about .about-block {
  padding: clamp(2.2rem, 5vw, 4.2rem) var(--gutter);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 84px;
}

.page-about .about-head {
  display: grid;
  gap: 0.7rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-head__index {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--paper-dim);
}

.page-about .about-head__num {
  display: inline-grid;
  place-items: center;
  min-width: 2rem;
  padding: 0.14rem 0.4rem;
  background: var(--amber);
  color: var(--ink-950);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(1.55rem, 3.6vw, 2.55rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-head__lede {
  max-width: 62ch;
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .about-cols {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.6rem);
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(1.3rem, 3vw, 2rem);
}

.page-about .about-body p {
  margin: 0 0 1.05rem;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-body p:last-child {
  margin-bottom: 0;
}

.page-about .about-body strong {
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-margin {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-about .note-card {
  padding: 1rem 1.05rem 1.1rem;
  border: 2px solid var(--line-strong);
  background: var(--ink-900);
  box-shadow: var(--shadow-stamp-sm);
}

.page-about .note-card--celadon {
  border-color: var(--celadon);
  background: var(--about-celadon-soft);
}

.page-about .note-card__label {
  display: block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .note-card--celadon .note-card__label {
  color: var(--celadon);
}

.page-about .note-card p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .note-card p + p {
  margin-top: 0.45rem;
}

.page-about .method-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.page-about .method-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: var(--ink-900);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-left-color 0.28s var(--ease);
}

.page-about .method-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-stamp-sm);
  border-left-color: var(--celadon);
}

.page-about .method-num {
  padding-top: 0.18rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .method-body {
  min-width: 0;
}

.page-about .method-body h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .method-body p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .team-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.3rem, 3vw, 2rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .team-card {
  padding: 1.1rem 1.05rem 1.2rem;
  border: 2px solid var(--line-strong);
  background: var(--ink-900);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-stamp-sm);
  border-color: var(--amber);
}

.page-about .team-card__tag {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-950);
}

.page-about .team-card__tag--amber {
  background: var(--amber);
}

.page-about .team-card__tag--celadon {
  background: var(--celadon);
}

.page-about .team-card__tag--paper {
  background: var(--paper);
}

.page-about .team-card h3 {
  margin: 0.8rem 0 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .team-card ul {
  margin: 0;
  padding-left: 1.05rem;
}

.page-about .team-card li {
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--paper-dim);
}

.page-about .team-card li:last-child {
  margin-bottom: 0;
}

.page-about .about-cols--teamnote {
  margin-top: clamp(1.3rem, 3vw, 2rem);
}

.page-about .tl-scale {
  display: flex;
  gap: 0.3rem;
  margin: clamp(1.3rem, 3vw, 2rem) 0 0;
  padding-bottom: 0.55rem;
  overflow-x: auto;
}

.page-about .tl-scale span {
  flex: 1 0 auto;
  min-width: 3.1rem;
  padding-top: 0.45rem;
  border-top: 2px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-align: center;
  color: var(--paper-dim);
}

.page-about .tl-scale .tl-scale__now {
  border-top-color: var(--amber);
  color: var(--amber);
}

.page-about .tl-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.1rem 0 1.6rem;
  padding: 0;
  list-style: none;
}

.page-about .tl-jump a {
  display: inline-block;
  padding: 0.32rem 0.6rem;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper-dim);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .tl-jump a:hover,
.page-about .tl-jump a:focus-visible {
  border-color: var(--amber);
  color: var(--paper);
}

.page-about .tl-list {
  margin: 0;
  padding: 0 0 0 1.6rem;
  list-style: none;
  border-left: 2px solid var(--line-strong);
  display: grid;
  gap: 1.6rem;
}

.page-about .tl-item {
  position: relative;
  scroll-margin-top: 96px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1.6rem - 7px);
  top: 0.45rem;
  width: 12px;
  height: 12px;
  background: var(--ink-950);
  border: 2px solid var(--amber);
  transform: rotate(45deg);
}

.page-about .tl-item:nth-child(even)::before {
  border-color: var(--celadon);
}

.page-about .tl-item__era {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .tl-item:nth-child(even) .tl-item__era {
  color: var(--celadon);
}

.page-about .tl-item h3 {
  margin: 0.4rem 0 0.45rem;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .tl-item p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .coverage {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.4rem);
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(1.3rem, 3vw, 2rem);
}

.page-about .cov-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.4rem, 1fr));
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.page-about .cov-stat {
  padding: 0.85rem 0.9rem 0.95rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--celadon);
  background: var(--ink-900);
}

.page-about .cov-stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .cov-stat span {
  display: block;
  margin-top: 0.35rem;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--paper-dim);
}

.page-about .principle-list {
  margin: clamp(1.3rem, 3vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .principle {
  padding: 1.1rem 1.15rem 1.2rem;
  border: 1px solid var(--line-strong);
  background: var(--about-soft);
  clip-path: var(--cut-corner);
}

.page-about .principle h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .principle p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-next {
  padding: clamp(2rem, 5vw, 3.6rem) var(--gutter) clamp(2.2rem, 5vw, 4rem);
}

.page-about .next-links {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.page-about .next-links li {
  border-bottom: 1px solid var(--line);
}

.page-about .next-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0.2rem;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--paper);
  text-decoration: none;
  transition: background 0.22s var(--ease), padding-left 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .next-links a:hover,
.page-about .next-links a:focus-visible {
  background: var(--ink-900);
  padding-left: 0.75rem;
}

.page-about .next-links__arrow {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--amber);
}

@media (min-width: 720px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cols--method {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .team-grid {
    grid-template-columns: 1.1fr 1fr 1.1fr;
  }

  .page-about .principle-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-hero__title {
    font-size: clamp(3rem, 4.6vw, 4.9rem);
  }

  .page-about .tl-list {
    padding-left: 2rem;
  }

  .page-about .tl-item::before {
    left: calc(-2rem - 7px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-head__title {
    font-size: clamp(2rem, 2.6vw, 2.55rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .method-item,
  .page-about .team-card,
  .page-about .next-links a,
  .page-about .tl-jump a {
    transition: none;
  }

  .page-about .method-item:hover,
  .page-about .team-card:hover,
  .page-about .next-links a:hover {
    transform: none;
  }

  .page-about .next-links a:hover {
    padding-left: 0.2rem;
  }
}
<<<END>>>