.page-about {
  background: var(--navy-900);
  color: var(--ink);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(92px, 14vw, 150px) 0 clamp(48px, 8vw, 84px);
  background:
    radial-gradient(95% 70% at 88% -6%, rgba(255, 107, 44, 0.2), transparent 62%),
    radial-gradient(70% 60% at -4% 12%, rgba(47, 243, 196, 0.1), transparent 58%),
    linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
  isolation: isolate;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: clamp(56px, 10vw, 104px);
  right: clamp(-40px, -3vw, 0px);
  width: min(42%, 460px);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--orange) 55%, var(--cy));
  transform: rotate(-16deg);
  transform-origin: right center;
  opacity: 0.75;
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(32px, 6vw, 56px);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cy);
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.page-about .about-hero h1 {
  font-size: clamp(32px, 7vw, 60px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  transform: skewX(-2deg);
  transform-origin: left center;
  margin: 0 0 clamp(18px, 3vw, 26px);
}

.page-about .about-lede {
  max-width: 60ch;
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.78;
  color: var(--muted);
  margin: 0 0 clamp(24px, 4vw, 34px);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-facts {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 3vw, 24px);
  background: linear-gradient(165deg, rgba(11, 39, 69, 0.94), rgba(7, 26, 47, 0.94));
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
}

.page-about .fact-num--cy { color: var(--cy); }
.page-about .fact-num--or { color: var(--orange); }
.page-about .fact-num--gold { color: var(--gold); }

.page-about .fact-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-body {
  padding: clamp(40px, 7vw, 88px) 0 clamp(64px, 10vw, 120px);
  background: linear-gradient(180deg, var(--navy-900) 0%, var(--navy-950) 100%);
}

.page-about .about-body-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-index {
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

.page-about .index-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 12px;
}

.page-about .index-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .index-list li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-about .index-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(11, 39, 69, 0.55);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .index-link:hover,
.page-about .index-link:focus-visible {
  color: var(--ink);
  border-color: var(--line-strong);
  background: rgba(255, 107, 44, 0.14);
}

.page-about .index-link:focus-visible {
  outline: 2px solid var(--cy);
  outline-offset: 2px;
}

.page-about .about-chapter {
  padding-block: clamp(36px, 6vw, 64px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 110px;
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(20px, 3.5vw, 32px);
}

.page-about .chapter-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(12px, 1.6vw, 14px);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
  padding: 5px 9px;
  border: 1px solid rgba(255, 107, 44, 0.45);
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.page-about .chapter-title {
  margin: 0;
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.01em;
  transform: skewX(-1.5deg);
  transform-origin: left center;
}

.page-about .chapter-body p {
  max-width: 70ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 1.05em;
}

.page-about .chapter-points {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .chapter-points li {
  position: relative;
  padding-left: 22px;
  font-size: clamp(14px, 1.7vw, 16px);
  line-height: 1.72;
  color: var(--muted);
}

.page-about .chapter-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--cy);
}

.page-about .chapter-points strong {
  color: var(--ink);
  font-weight: 700;
}

.page-about .chapter-figure {
  margin: clamp(20px, 3.5vw, 32px) 0 0;
}

.page-about .chapter-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  background: var(--navy-800);
}

.page-about .chapter-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel);
  letter-spacing: 0.02em;
}

.page-about .chapter-layout {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .chapter-layout .chapter-figure {
  margin: 0;
}

.page-about .roadmap {
  position: relative;
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(10px, 2vw, 16px);
  margin-inline: clamp(-16px, -2vw, 0px);
  background-image: repeating-linear-gradient(
    115deg,
    rgba(47, 243, 196, 0.07) 0 1px,
    transparent 1px 26px
  );
}

.page-about .road-node {
  position: relative;
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: linear-gradient(155deg, rgba(11, 39, 69, 0.82), rgba(7, 26, 47, 0.86));
  padding: clamp(14px, 2.4vw, 20px) clamp(16px, 2.6vw, 24px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .road-node[open] {
  border-left-color: var(--cy);
  background: linear-gradient(155deg, rgba(11, 39, 69, 0.96), rgba(7, 26, 47, 0.96));
}

.page-about .road-summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-right: 30px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .road-summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cy);
}

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

.page-about .road-summary:focus-visible {
  outline: 2px solid var(--cy);
  outline-offset: 4px;
}

.page-about .road-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .road-name {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.page-about .road-body {
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .road-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--muted);
  max-width: 68ch;
}

.page-about .process {
  list-style: none;
  margin: clamp(22px, 3.5vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .process-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 18px);
  padding: clamp(15px, 2.6vw, 22px);
  background: rgba(7, 26, 47, 0.88);
}

.page-about .process-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--violet);
}

.page-about .process-item h3 {
  margin: 0 0 5px;
  font-size: clamp(15px, 1.9vw, 18px);
  font-weight: 700;
  color: var(--ink);
}

.page-about .process-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
  max-width: 56ch;
}

.page-about .tabs {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .tablist {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
}

.page-about .tab {
  flex: 0 0 auto;
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 18px;
  cursor: pointer;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tab:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

.page-about .tab[aria-selected="true"] {
  background: linear-gradient(120deg, var(--orange-soft), var(--orange-deep));
  border-color: transparent;
  color: var(--ink-900);
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--cy);
  outline-offset: 2px;
}

.page-about .tab-panel {
  margin-top: 12px;
  padding: clamp(16px, 2.8vw, 24px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cy);
  background: rgba(11, 39, 69, 0.55);
}

.page-about .tab-panel p {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(14px, 1.7vw, 16px);
  line-height: 1.78;
  color: var(--muted);
}

.page-about .tab-panel[hidden] {
  display: none;
}

.page-about .support-grid {
  display: grid;
  gap: clamp(14px, 2.5vw, 20px);
  margin-top: clamp(24px, 4vw, 32px);
}

.page-about .support-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(11, 39, 69, 0.85), rgba(7, 26, 47, 0.85));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .support-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .support-card p {
  margin: 0;
  max-width: 48ch;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
}

.page-about .support-card a {
  margin-top: 4px;
  color: var(--cy);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.page-about .support-card a:hover,
.page-about .support-card a:focus-visible {
  text-decoration: underline;
}

.page-about .support-contact {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gold);
  word-break: break-word;
}

@media (min-width: 760px) {
  .page-about .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .chapter-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
    gap: clamp(32px, 5vw, 56px);
  }

  .page-about .chapter-figure--side {
    position: sticky;
    top: 120px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.78fr);
    align-items: end;
    gap: clamp(40px, 6vw, 80px);
  }
}

@media (min-width: 1000px) {
  .page-about .about-body-grid {
    grid-template-columns: 212px minmax(0, 1fr);
    align-items: start;
    gap: clamp(48px, 7vw, 92px);
  }

  .page-about .about-index {
    position: sticky;
    top: 108px;
  }

  .page-about .index-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .index-link {
    width: 100%;
  }

  .page-about .chapter-head {
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .index-link,
  .page-about .tab,
  .page-about .road-node {
    transition: none;
  }

  .page-about .about-hero h1,
  .page-about .chapter-title {
    transform: none;
  }
}
<<<END>>>