.page-about {
  --about-rule: rgba(25, 20, 16, 0.16);
  --about-rule-soft: rgba(25, 20, 16, 0.08);
  --about-gold-soft: rgba(168, 120, 42, 0.16);
  --about-bark-veil: rgba(43, 31, 23, 0.92);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-hero {
  padding-top: 10px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 7.6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.012em;
  margin: 14px 0 20px;
  color: var(--ink);
}

.page-about .about-hero__lead-text {
  max-width: 52ch;
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-jump__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-jump__link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bark);
  text-decoration: none;
  border-bottom: 1px solid var(--about-gold-soft);
  padding-bottom: 2px;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--cinnabar-deep);
  border-bottom-color: var(--cinnabar);
}

.page-about .about-hero__figure {
  margin: 0 0 26px;
}

.page-about .about-frame {
  position: relative;
  z-index: 1;
  border: 2px solid var(--bark);
  box-shadow: var(--shadow-hard);
  background-color: var(--paper-deep);
  overflow: hidden;
}

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

.page-about .about-frame--hero {
  aspect-ratio: 14 / 10;
}

.page-about .about-frame--archive {
  aspect-ratio: 4 / 3;
}

.page-about .about-frame--band {
  aspect-ratio: 3 / 2;
}

.page-about .about-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .about-meta {
  margin: 0;
  border-top: 2px solid var(--bark);
}

.page-about .about-meta__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-meta dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-meta dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--bark);
}

.page-about .about-section-head {
  max-width: 800px;
}

.page-about .about-section-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.005em;
  margin: 10px 0 14px;
  color: var(--ink);
}

.page-about .about-section-head__note {
  margin: 0;
  color: var(--mist);
  max-width: 58ch;
  line-height: 1.85;
}

.page-about .about-timeline-section {
  background-color: var(--paper-deep);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-stage-list {
  position: relative;
  list-style: none;
  margin: 38px 0 0;
  padding: 0 0 0 30px;
}

.page-about .about-stage-list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold) 42%, var(--about-rule) 100%);
}

.page-about .about-stage {
  position: relative;
  padding-bottom: 30px;
}

.page-about .about-stage:last-child {
  padding-bottom: 4px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 6px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background-color: var(--paper-deep);
  border: 3px solid var(--gold);
}

.page-about .about-stage:last-child::before {
  border-color: var(--cinnabar);
  background-color: var(--cinnabar);
  box-shadow: 0 0 0 5px var(--about-gold-soft);
}

.page-about .about-stage__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bark);
  background-color: var(--gold-pale);
  border: 1px solid var(--about-rule);
  padding: 4px 9px;
}

.page-about .about-stage__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  line-height: 1.25;
  margin: 10px 0 12px;
  color: var(--ink);
}

.page-about .about-stage__detail p {
  margin: 0 0 12px;
  line-height: 1.85;
}

.page-about .about-stage__note {
  font-size: 14.5px;
  color: var(--mist);
  border-left: 2px solid var(--about-gold-soft);
  padding-left: 14px;
}

.page-about .about-timeline-banner {
  margin: 30px 0 0;
}

.page-about .about-archive-section {
  padding-top: 0;
}

.page-about .about-archive {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .about-archive__figure {
  position: relative;
  margin: 0;
}

.page-about .about-archive__figure::after {
  content: "";
  position: absolute;
  inset: 16px -16px -16px 16px;
  border: 2px solid var(--gold);
  pointer-events: none;
}

.page-about .about-archive__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  line-height: 1.2;
  margin: 10px 0 14px;
  color: var(--ink);
}

.page-about .about-archive__lead {
  margin: 0;
  color: var(--mist);
  max-width: 46ch;
  line-height: 1.85;
}

.page-about .about-archive__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 2px solid var(--bark);
}

.page-about .about-archive__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-archive__index {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-top: 3px;
}

.page-about .about-archive__item h3 {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--bark);
}

.page-about .about-archive__item p {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-beats {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 3px solid var(--bark);
}

.page-about .about-beat {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-beat__mark {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cinnabar-deep);
}

.page-about .about-beat__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ink);
}

.page-about .about-beat__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-principles {
  background-color: var(--paper-deep);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-principles__grid {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .about-principles__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  line-height: 1.2;
  margin: 10px 0 14px;
  color: var(--ink);
}

.page-about .about-principles__lead {
  margin: 0;
  max-width: 50ch;
  color: var(--mist);
  line-height: 1.85;
}

.page-about .about-principle-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-principle {
  padding-left: 18px;
  border-left: 3px solid var(--gold);
}

.page-about .about-principle h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--bark);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-scene-panel {
  background-color: var(--bark);
  color: var(--surface);
  border: 2px solid var(--bark);
  box-shadow: 9px 9px 0 rgba(168, 120, 42, 0.45);
  padding: 26px 22px;
}

.page-about .about-scene-panel__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--gold-pale);
}

.page-about .about-scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: scene;
}

.page-about .about-scene-list li {
  counter-increment: scene;
  position: relative;
  padding: 11px 0 11px 32px;
  font-size: 14.5px;
  line-height: 1.7;
  border-bottom: 1px solid rgba(231, 210, 168, 0.22);
}

.page-about .about-scene-list li::before {
  content: counter(scene, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 11px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-scene-panel__foot {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.75;
  color: rgba(231, 210, 168, 0.78);
}

.page-about .about-devices__grid {
  display: grid;
  gap: 28px;
  margin-top: 34px;
}

.page-about .about-stat {
  padding-top: 20px;
  border-top: 3px solid var(--bark);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 11vw, 5rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: transparent;
  background-image: linear-gradient(135deg, var(--amber) 0%, var(--gold) 78%);
  -webkit-background-clip: text;
  background-clip: text;
}

.page-about .about-stat__label {
  margin: 10px 0 8px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bark);
}

.page-about .about-stat__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 42ch;
}

.page-about .about-next {
  background-color: var(--bark);
  color: var(--surface);
}

.page-about .about-next__head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  line-height: 1.22;
  margin: 0 0 12px;
  color: var(--surface);
}

.page-about .about-next__head p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(231, 210, 168, 0.8);
}

.page-about .about-next__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__list .btn {
  display: inline-block;
}

@media (min-width: 700px) {
  .page-about .about-beat {
    grid-template-columns: 108px minmax(0, 1fr) minmax(0, 1.6fr);
    align-items: baseline;
    column-gap: 26px;
    row-gap: 0;
  }

  .page-about .about-beat__title {
    font-size: 1.25rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 18px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.34fr) minmax(0, 1fr);
    column-gap: 56px;
    row-gap: 0;
    align-items: start;
  }

  .page-about .about-hero__side {
    padding-top: 8px;
    border-left: 1px solid var(--about-rule);
    padding-left: 32px;
  }

  .page-about .about-stage {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    column-gap: 46px;
    align-items: start;
    padding-bottom: 36px;
  }

  .page-about .about-stage__head {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-stage__title {
    margin-bottom: 0;
  }

  .page-about .about-archive {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    column-gap: 60px;
  }

  .page-about .about-principles__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    column-gap: 56px;
  }

  .page-about .about-devices__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }

  .page-about .about-next__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 56px;
    align-items: center;
  }

  .page-about .about-next__list {
    justify-content: flex-end;
    margin-top: 0;
  }
}

@media (min-width: 1180px) {
  .page-about .about-stage-list {
    padding-left: 40px;
  }

  .page-about .about-stage::before {
    left: -47px;
    width: 19px;
    height: 19px;
  }

  .page-about .about-timeline-banner {
    margin-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump__link {
    transition: none;
  }
}