.page-about {
  --about-bg-gradient: radial-gradient(ellipse at 18% 8%, rgba(46, 107, 94, 0.14) 0%, transparent 54%),
    radial-gradient(ellipse at 88% 42%, rgba(196, 85, 43, 0.08) 0%, transparent 42%),
    linear-gradient(180deg, var(--color-cream) 0%, rgba(244, 239, 230, 0.92) 48%, var(--color-cream) 100%);
  --about-v4-accent: var(--color-gold);
  --about-border-hard: 1.5px solid var(--color-moss);
  --about-shadow: 6px 6px 0 rgba(31, 61, 45, 0.2);
  position: relative;
  background: var(--about-bg-gradient);
  color: var(--color-ink);
  min-height: 100vh;
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: 24px 24px 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--color-mist);
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .breadcrumb a {
  color: var(--color-wave);
  text-decoration: none;
  border-bottom: 1px dotted transparent;
  transition: border-color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  border-bottom-color: var(--color-wave);
  outline: none;
}

.page-about .breadcrumb__item--current {
  color: var(--color-moss);
  font-weight: 600;
}

.page-about .breadcrumb__sep {
  color: var(--color-terracotta);
}

.page-about .about-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-hero__index-wrap {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: absolute;
  right: 24px;
  top: -8px;
  opacity: 0.85;
}

.page-about .about-hero__index {
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 14vw, 8.5rem);
  line-height: 0.85;
  color: var(--color-moss);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-about .about-hero__vertical {
  writing-mode: vertical-rl;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.45em;
  color: var(--color-terracotta);
  padding-left: 10px;
  font-weight: 600;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  line-height: 1.16;
  color: var(--color-moss);
  font-weight: 700;
  letter-spacing: 0.01em;
  max-width: 780px;
  margin: 0;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-ink);
  max-width: 620px;
  margin: 0 0 8px;
  padding: 16px 0 0 18px;
  border-left: 3px solid var(--color-wave);
  background: linear-gradient(90deg, rgba(46, 107, 94, 0.06) 0%, transparent 80%);
}

.page-about .about-hero .scale-rule {
  grid-column: 1 / -1;
  height: 12px;
  background: repeating-linear-gradient(90deg,
      var(--color-moss) 0 2px,
      transparent 2px 10px,
      var(--color-terracotta) 10px 12px,
      transparent 12px 18px);
  opacity: 0.65;
  margin-top: 8px;
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 28px;
  border-bottom: var(--about-border-hard);
  padding-bottom: 16px;
}

.page-about .section-head__index {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-terracotta);
  line-height: 1;
}

.page-about .section-head__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  color: var(--color-moss);
  font-weight: 700;
  margin: 0;
  line-height: 1.2;
}

.page-about .section-head__note {
  margin-left: auto;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--color-mist);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  white-space: nowrap;
  line-height: 1.4;
  padding-bottom: 6px;
}

.page-about .about-origin {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 24px;
}

.page-about .about-origin__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-origin__text p {
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 18px;
  text-align: justify;
}

.page-about .about-origin__text .btn {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 22px;
  border: var(--about-border-hard);
  color: var(--color-moss);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 3px 3px 0 rgba(31, 61, 45, 0.2);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-origin__text .btn:hover,
.page-about .about-origin__text .btn:focus-visible {
  background: var(--color-moss);
  color: var(--color-cream);
  box-shadow: 5px 5px 0 rgba(196, 85, 43, 0.35);
  transform: translate(-2px, -2px);
  outline: none;
}

.page-about .about-origin__figure {
  margin: 0;
  border: var(--about-border-hard);
  box-shadow: var(--about-shadow);
  background: var(--color-soft);
  transform: rotate(-0.6deg);
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-origin__figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-mist);
  padding: 10px 14px;
  border-top: 1px solid rgba(31, 61, 45, 0.25);
  background: rgba(244, 239, 230, 0.8);
}

.page-about .about-origin__quote {
  margin: 36px 0 0;
  padding: 24px 24px 24px 28px;
  border-left: 5px solid var(--color-terracotta);
  background: linear-gradient(90deg, rgba(196, 85, 43, 0.07) 0%, transparent 100%);
}

.page-about .about-origin__quote p {
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-moss);
  margin: 0;
}

.page-about .about-timeline {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.page-about .about-timeline__frame {
  border: var(--about-border-hard);
  box-shadow: var(--about-shadow);
  background: rgba(244, 239, 230, 0.82);
  margin-bottom: 28px;
}

.page-about .window-frame__bar {
  height: 24px;
  background: var(--color-moss);
  border-bottom: var(--about-border-hard);
}

.page-about .window-frame__body {
  padding: 20px 14px;
  overflow-x: auto;
}

.page-about .timeline-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
  min-width: 320px;
}

.page-about .timeline-node {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 52px;
  bottom: -28px;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--color-wave) 0 4px, transparent 4px 10px);
  opacity: 0.4;
}

.page-about .timeline-node:last-child::before {
  display: none;
}

.page-about .timeline-node__dot {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: var(--about-border-hard);
  background: var(--color-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  box-shadow: 3px 3px 0 rgba(31, 61, 45, 0.18);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .timeline-node__dot:hover,
.page-about .timeline-node__dot:focus-visible {
  background: var(--color-moss);
  box-shadow: 5px 5px 0 rgba(196, 85, 43, 0.3);
  outline: none;
}

.page-about .timeline-node--current .timeline-node__dot {
  border-color: var(--color-terracotta);
  background: var(--color-terracotta);
}

.page-about .timeline-node--current .timeline-node__dot .timeline-node__ver {
  color: var(--color-cream);
}

.page-about .timeline-node__dot:hover .timeline-node__ver,
.page-about .timeline-node__dot:focus-visible .timeline-node__ver {
  color: var(--color-cream);
}

.page-about .timeline-node__ver {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-moss);
  transition: color 0.2s var(--ease);
}

.page-about .timeline-node__card {
  border: var(--about-border-hard);
  background: var(--color-cream);
  box-shadow: 6px 6px 0 rgba(31, 61, 45, 0.15);
  padding: 14px 18px;
  transform: rotate(0.25deg);
}

.page-about .timeline-node--current .timeline-node__card {
  border-width: 2px;
  border-color: var(--color-terracotta);
  background: linear-gradient(135deg, var(--color-cream) 0%, rgba(217, 164, 65, 0.1) 100%);
}

.page-about .timeline-node__card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 8px;
  color: var(--color-moss);
  font-weight: 700;
}

.page-about .timeline-node__card p {
  font-size: 0.9375rem;
  line-height: 1.7;
  margin: 0;
  color: var(--color-ink);
}

.page-about .about-timeline__sketch {
  margin: 36px 0 0;
  text-align: center;
}

.page-about .about-timeline__sketch img {
  max-width: 100%;
  height: auto;
  border: var(--about-border-hard);
  box-shadow: var(--about-shadow);
  background: var(--color-soft);
}

.page-about .about-timeline__sketch figcaption {
  font-size: 0.8125rem;
  color: var(--color-mist);
  padding-top: 10px;
  letter-spacing: 0.04em;
}

.page-about .about-numbers {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  position: relative;
}

.page-about .about-numbers::before {
  content: "墨";
  position: absolute;
  right: -32px;
  top: 20px;
  font-family: var(--font-display);
  font-size: 11rem;
  line-height: 1;
  color: rgba(31, 61, 45, 0.055);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-numbers__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 20px;
}

.page-about .stat-card {
  border: var(--about-border-hard);
  background: var(--color-cream);
  box-shadow: var(--about-shadow);
  padding: 20px 18px;
  position: relative;
  clip-path: polygon(0 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
}

.page-about .stat-card:nth-child(even) {
  transform: translateY(14px);
}

.page-about .stat-card__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-wave);
  letter-spacing: 0.06em;
  margin: 0 0 10px;
}

.page-about .stat-card__num {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 7vw, 4rem);
  font-weight: 700;
  line-height: 1;
  margin: 0 0 10px;
  color: var(--color-moss);
  position: relative;
  display: inline-block;
}

.page-about .stat-card__num::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 40%;
  height: 4px;
  background: var(--color-gold);
  transform: skewX(-30deg);
}

.page-about .stat-card__unit {
  font-size: 0.5em;
  color: var(--color-terracotta);
  margin-left: 2px;
}

.page-about .stat-card__note {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-mist);
  margin: 0;
}

.page-about .about-numbers__footnote {
  max-width: 720px;
  margin: 24px 0 0 auto;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-ink);
  padding: 16px 18px;
  border-right: 4px solid var(--color-wave);
  border-top: var(--about-border-hard);
  border-bottom: var(--about-border-hard);
  background: rgba(46, 107, 94, 0.05);
  text-align: right;
}

.page-about .about-local {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 40px;
}

.page-about .about-local__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about .about-local__figure {
  margin: 0;
  border: var(--about-border-hard);
  box-shadow: var(--about-shadow);
  background: var(--color-soft);
  transform: rotate(0.7deg);
  position: relative;
}

.page-about .about-local__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-local__figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-mist);
  padding: 10px 14px;
  border-top: 1px solid rgba(31, 61, 45, 0.25);
  background: rgba(244, 239, 230, 0.85);
}

.page-about .about-local__content p {
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 18px;
}

.page-about .about-local__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: var(--about-border-hard);
}

.page-about .about-local__list li {
  padding: 10px 0 10px 22px;
  border-bottom: 1px dashed rgba(46, 107, 94, 0.4);
  font-size: 0.9375rem;
  line-height: 1.6;
  position: relative;
}

.page-about .about-local__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-terracotta);
  transform: translateY(-50%);
  opacity: 0.85;
}

.page-about .about-local__contact {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--color-moss);
  color: var(--color-cream);
  padding: 14px 18px;
  box-shadow: var(--about-shadow);
  font-size: 0.875rem;
}

.page-about .about-local__contact p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.page-about .about-local__contact a {
  color: var(--color-gold);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-gold);
}

.page-about .about-local__contact a:hover,
.page-about .about-local__contact a:focus-visible {
  border-bottom-style: solid;
  outline: none;
}

.page-about .about-more {
  max-width: 1200px;
  margin: 0 auto;
  padding: 8px 24px 56px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-more__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-moss);
  padding: 14px 0;
  border-bottom: 1.5px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
  width: fit-content;
}

.page-about .about-more__link span {
  font-family: var(--font-mono);
  color: var(--color-terracotta);
  font-size: 1.2rem;
  transition: transform 0.2s var(--ease);
}

.page-about .about-more__link:hover,
.page-about .about-more__link:focus-visible {
  border-bottom-color: var(--color-terracotta);
  color: var(--color-terracotta);
  transform: translateX(4px);
  outline: none;
}

.page-about .about-more__link:hover span,
.page-about .about-more__link:focus-visible span {
  transform: translateX(4px);
}

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  .page-about .breadcrumb {
    padding: 28px 40px 0;
  }

  .page-about .about-hero {
    padding: 72px 40px 48px;
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-hero__title {
    grid-column: 1 / -1;
  }

  .page-about .about-hero__lead {
    grid-column: 1;
    margin: 0;
  }

  .page-about .about-hero__index-wrap {
    right: 40px;
    top: 16px;
  }

  .page-about .about-origin {
    padding: 64px 40px 40px;
  }

  .page-about .about-origin__layout {
    grid-template-columns: minmax(280px, 0.85fr) 1.15fr;
    gap: 44px;
  }

  .page-about .about-origin__text {
    order: 1;
  }

  .page-about .about-origin__figure {
    order: 2;
  }

  .page-about .about-origin__quote {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-timeline {
    padding: 64px 40px 48px;
  }

  .page-about .timeline-track {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
    padding-bottom: 12px;
  }

  .page-about .timeline-node {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 14px;
    position: relative;
  }

  .page-about .timeline-node::before {
    left: auto;
    right: -50%;
    top: 27px;
    bottom: auto;
    width: 100%;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--color-wave) 0 6px, transparent 6px 12px);
    opacity: 0.35;
    z-index: 1;
  }

  .page-about .timeline-node:last-child::before {
    display: block;
    right: auto;
    left: -50%;
    width: 100%;
  }

  .page-about .timeline-node__dot {
    position: relative;
    z-index: 2;
    width: 56px;
    height: 56px;
    margin-bottom: 18px;
  }

  .page-about .timeline-node__card {
    width: 100%;
    transform: none;
    text-align: left;
    max-width: 250px;
    margin: 0 auto;
  }

  .page-about .timeline-node__card p {
    font-size: 0.875rem;
  }

  .page-about .about-timeline__sketch {
    margin-top: 48px;
  }

  .page-about .about-timeline__sketch img {
    width: 500px;
  }

  .page-about .about-numbers {
    padding: 64px 40px 48px;
  }

  .page-about .about-numbers__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }

  .page-about .stat-card {
    padding: 28px 22px;
    clip-path: polygon(0 0, 100% 0, calc(100% - 18px) 100%, 0 100%);
  }

  .page-about .stat-card:nth-child(2) {
    transform: translateY(22px);
  }

  .page-about .stat-card:nth-child(3) {
    transform: translateY(-6px);
  }

  .page-about .stat-card:nth-child(4) {
    transform: translateY(16px);
  }

  .page-about .stat-card__q-num {
    font-size: 3.2rem;
  }

  .page-about .about-local {
    padding: 64px 40px 56px;
  }

  .page-about .about-local__layout {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .page-about .about-local__figure {
    order: 1;
  }

  .page-about .about-local__content {
    order: 2;
  }

  .page-about .about-more {
    padding: 8px 40px 72px;
    flex-direction: row;
    justify-content: flex-end;
    gap: 36px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero {
    padding-left: 72px;
    padding-right: 72px;
  }

  .page-about .about-origin {
    padding-left: 72px;
    padding-right: 72px;
  }

  .page-about .about-timeline {
    padding-left: 72px;
    padding-right: 72px;
  }

  .page-about .about-numbers {
    padding-left: 72px;
    padding-right: 72px;
  }

  .page-about .about-local {
    padding-left: 72px;
    padding-right: 72px;
  }

  .page-about .about-more {
    padding-left: 72px;
    padding-right: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
}