.page-about {
  --about-paper-shadow: 8px 8px 0 rgba(185, 180, 166, 0.18), 0 30px 60px -36px #000;
  --about-paper-ink: #141821;
  background: var(--ink-900);
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 8vw, 92px) var(--gutter) clamp(36px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 30%, rgba(122, 92, 255, 0.24), transparent 42%),
    radial-gradient(circle at 16% 82%, rgba(47, 107, 255, 0.18), transparent 46%),
    var(--ink-900);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.16;
  pointer-events: none;
}

.page-about .hero-copy,
.page-about .hero-side {
  position: relative;
  z-index: 1;
}

.page-about .hero-copy {
  max-width: 780px;
}

.page-about h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(40px, 7.2vw, 88px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .hero-copy .section-lead {
  max-width: 62ch;
  font-size: clamp(16px, 2vw, 19px);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 28px;
}

.page-about .hero-side-label {
  display: block;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .hero-stats .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1;
  color: var(--green);
}

.page-about .hero-stats .stat-value small {
  font-size: 0.5em;
  color: var(--muted);
}

.page-about .hero-stats .stat-label {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-layout {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(32px, 6vw, 80px) var(--gutter) 72px;
}

.page-about .about-toc {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  padding-bottom: 14px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-about .about-toc .toc-title {
  display: none;
}

.page-about .about-toc .toc-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
  padding: 6px 0;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease;
}

.page-about .about-toc .toc-tick {
  display: block;
  flex: none;
  width: 8px;
  height: 2px;
  background: var(--stone);
  transition: width 220ms ease, background 220ms ease;
}

.page-about .about-toc .toc-link[aria-current="true"] {
  color: var(--text);
}

.page-about .about-toc .toc-link[aria-current="true"] .toc-tick {
  width: 28px;
  background: var(--green);
  box-shadow: var(--glow-green);
}

.page-about .about-top-link {
  display: none;
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
}

.page-about .about-section + .about-section {
  margin-top: clamp(64px, 9vw, 120px);
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(16px, 3vw, 28px);
  align-items: start;
}

.page-about .chapter-no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(52px, 9vw, 110px);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: var(--ink-700);
  -webkit-text-stroke: 1px rgba(47, 107, 255, 0.34);
  text-shadow: 0 0 36px rgba(122, 92, 255, 0.32);
}

.page-about .about-head .section-title {
  max-width: 22ch;
  margin-top: 8px;
}

.page-about .about-head .section-lead {
  max-width: 66ch;
  margin-top: 14px;
}

.page-about .about-figure {
  margin: clamp(26px, 4vw, 38px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border: 1px solid var(--line-blue);
  box-shadow: var(--glow-blue);
}

.page-about .about-figure .media-caption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.page-about .timeline {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 11px;
  width: 1px;
  background: linear-gradient(var(--green), var(--line-blue), transparent);
}

.page-about .timeline-item {
  position: relative;
  padding-left: 42px;
}

.page-about .timeline-item + .timeline-item {
  margin-top: 26px;
}

.page-about .timeline-dot {
  position: absolute;
  top: 8px;
  left: 4px;
  width: 15px;
  height: 15px;
  border: 2px solid var(--green);
  border-radius: 50%;
  background: var(--ink-900);
  box-shadow: var(--glow-green);
}

.page-about .timeline-card {
  padding: 18px 20px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--green);
  border-radius: 0 var(--radius-l) var(--radius-l) 0;
  background: linear-gradient(135deg, rgba(14, 21, 48, 0.96), rgba(6, 10, 24, 0.96));
}

.page-about .timeline-era {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--green);
}

.page-about .timeline-card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.15;
}

.page-about .timeline-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .timeline-more {
  margin-top: 14px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-about .timeline-more summary {
  cursor: pointer;
  color: var(--blue);
  font-size: 13px;
  list-style: none;
}

.page-about .timeline-more summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-more summary::after {
  content: " +";
  color: var(--green);
}

.page-about .timeline-more[open] summary::after {
  content: " −";
}

.page-about .timeline-more p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.page-about .bridge-list {
  display: grid;
  gap: 0;
  margin-top: 30px;
}

.page-about .bridge-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-about .bridge-item:nth-child(even) {
  padding-left: clamp(0px, 4vw, 44px);
}

.page-about .bridge-no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.page-about .bridge-content h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 27px);
  letter-spacing: -0.01em;
}

.page-about .bridge-content p {
  margin: 0 0 12px;
  max-width: 68ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .bridge-link {
  color: var(--blue);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: color 160ms ease;
}

.page-about .bridge-link:hover,
.page-about .bridge-link:focus-visible {
  color: var(--green);
}

.page-about .about-paper {
  margin-top: 30px;
  padding: clamp(22px, 4vw, 44px);
  border: 1px solid var(--stone);
  border-radius: 2px;
  background: var(--paper);
  color: var(--about-paper-ink);
  box-shadow: var(--about-paper-shadow);
}

.page-about .about-paper > p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .region-layout {
  display: grid;
  gap: 26px;
}

.page-about .region-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid rgba(20, 24, 33, 0.18);
  filter: saturate(0.9) contrast(1.05);
}

.page-about .region-map {
  display: block;
  width: 100%;
  height: auto;
  max-height: 92px;
  margin-bottom: 16px;
}

.page-about .region-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .region-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .region-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  border: 1px solid rgba(20, 24, 33, 0.18);
  background: rgba(255, 255, 255, 0.28);
  font-size: 14px;
}

.page-about .region-dot {
  display: block;
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--blue);
}

.page-about .region-note {
  margin-top: 20px !important;
  padding-top: 14px;
  border-top: 1px solid rgba(20, 24, 33, 0.16);
  color: #4b5261;
  font-size: 13px !important;
}

.page-about .team-layout {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-about .team-roles {
  margin: 0;
  padding: 0;
}

.page-about .role {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--blue);
}

.page-about .role + .role {
  margin-top: 20px;
}

.page-about .role:nth-child(2) {
  margin-left: clamp(0px, 3vw, 28px);
}

.page-about .role dt {
  margin-bottom: 5px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .role dd {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .process {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-about .process-step {
  flex: 1 1 135px;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  color: var(--muted);
  font-size: 13px;
}

.page-about .process-no {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--orange);
}

.page-about .team-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-blue);
  box-shadow: 0 24px 60px -42px #000;
}

.page-about .field-group {
  margin-top: 16px;
  border: 1px solid rgba(20, 24, 33, 0.22);
  background: rgba(255, 255, 255, 0.3);
}

.page-about .field-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 17px;
  cursor: pointer;
  color: var(--about-paper-ink);
  font-weight: 700;
  list-style: none;
}

.page-about .field-group summary::-webkit-details-marker {
  display: none;
}

.page-about .field-group[open] summary {
  border-bottom: 1px solid rgba(20, 24, 33, 0.16);
}

.page-about .field-count {
  color: #596171;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
}

.page-about .field-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px 14px;
  margin: 0;
  padding: 16px 17px 19px;
  list-style: none;
  font-size: 14px;
}

.page-about .field-list li {
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.page-about .field-list li::before {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  flex: none;
  background: var(--orange);
}

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

.page-about .version-track {
  display: grid;
  gap: 13px;
  margin-top: 4px;
}

.page-about .version-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: 16px;
  border: 1px solid rgba(20, 24, 33, 0.18);
  background: rgba(255, 255, 255, 0.24);
}

.page-about .version-tag {
  align-self: start;
  padding: 4px 7px;
  background: #141821;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .version-tag--live {
  background: var(--orange);
  color: #141821;
}

.page-about .version-item h3 {
  margin: 0 0 6px;
  color: var(--about-paper-ink);
  font-family: var(--font-display);
  font-size: 21px;
}

.page-about .version-item p {
  margin: 0 0 10px;
  color: #3f4654;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-cta {
  display: grid;
  gap: 24px;
  margin-top: clamp(56px, 8vw, 100px);
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line-blue);
  background:
    radial-gradient(circle at 82% 18%, rgba(122, 92, 255, 0.22), transparent 42%),
    linear-gradient(135deg, rgba(47, 107, 255, 0.2), rgba(14, 21, 48, 0.96)),
    var(--ink-800);
  box-shadow: var(--glow-blue);
}

.page-about .about-cta .section-title {
  max-width: 20ch;
  margin-top: 8px;
}

.page-about .about-cta p {
  max-width: 62ch;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-about .about-footnote {
  margin: 32px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
}

@media (min-width: 520px) {
  .page-about .field-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-about .region-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: clamp(26px, 4vw, 42px);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .about-cta-actions {
    justify-content: flex-end;
    max-width: 310px;
  }

  .page-about .about-paper {
    transform: rotate(-0.3deg);
  }
}

@media (min-width: 920px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: end;
  }

  .page-about .hero-side {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding-left: 28px;
    border-left: 1px solid var(--line);
  }

  .page-about .hero-side-label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin-bottom: 0;
    white-space: nowrap;
  }

  .page-about .hero-stats {
    flex: 1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
    gap: clamp(42px, 6vw, 92px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 96px;
    display: block;
    margin-bottom: 0;
    padding-bottom: 0;
    overflow: visible;
    border-bottom: 0;
  }

  .page-about .about-toc .toc-title {
    display: block;
    margin: 0 0 18px;
    color: var(--stone);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
  }

  .page-about .about-toc .toc-link {
    display: flex;
    width: 100%;
    padding: 9px 0;
  }

  .page-about .about-top-link {
    display: block;
    margin-top: 26px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
  }

  .page-about .about-head {
    gap: clamp(20px, 3vw, 34px);
  }

  .page-about .bridge-item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 22px;
    padding: 26px 0;
  }

  .page-about .bridge-no {
    font-size: 15px;
  }

  .page-about .field-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>