.page-about {
  --about-rail-width: 200px;
  --about-hero-cut: 46px;
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(circle at 82% 18%, rgba(53, 242, 208, 0.09), transparent 30%),
    radial-gradient(circle at 16% 84%, rgba(242, 184, 75, 0.07), transparent 34%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(147, 170, 161, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(147, 170, 161, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 82%);
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
  padding-block: clamp(28px, 5vw, 54px) clamp(40px, 7vw, 82px);
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .hero-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.page-about .hero-title {
  margin: 18px 0 20px;
  max-width: 12ch;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 0.93;
}

.page-about .hero-lede {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.75;
}

.page-about .hero-lede strong {
  color: var(--paper);
  font-weight: 600;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 38px);
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-about .hero-stat {
  min-width: 0;
  padding: 16px 16px 14px;
  background: rgba(10, 31, 26, 0.86);
}

.page-about .hero-stat .stat-value {
  display: block;
  color: var(--cyan);
  font-family: var(--font-num);
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  font-weight: 500;
  line-height: 1;
}

.page-about .hero-stat:nth-child(2) .stat-value,
.page-about .hero-stat:nth-child(4) .stat-value {
  color: var(--amber);
}

.page-about .hero-stat .stat-label {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .hero-visual {
  min-width: 0;
}

.page-about .hero-cover {
  position: relative;
  overflow: hidden;
  min-height: 320px;
  aspect-ratio: 14 / 10;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-hero-cut)), calc(100% - var(--about-hero-cut)) 100%, 0 100%);
}

.page-about .cover-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.06) brightness(0.78);
}

.page-about .hero-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(10, 31, 26, 0.55), transparent 38%),
    linear-gradient(0deg, rgba(10, 31, 26, 0.92), transparent 52%),
    linear-gradient(135deg, rgba(53, 242, 208, 0.08), transparent 42%);
}

.page-about .hero-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(234, 244, 239, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(234, 244, 239, 0.06) 1px, transparent 1px);
  background-size: 38px 38px;
  opacity: 0.6;
}

.page-about .cover-topline {
  position: absolute;
  top: 16px;
  left: 16px;
  right: 16px;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-about .cover-label {
  padding: 6px 10px;
  border: 1px solid rgba(234, 244, 239, 0.28);
  background: rgba(10, 31, 26, 0.72);
  color: var(--paper);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-about .cover-year {
  position: absolute;
  right: 18px;
  bottom: 46px;
  z-index: 2;
  color: rgba(242, 184, 75, 0.92);
  font-family: var(--font-num);
  font-size: clamp(4.2rem, 11vw, 7.4rem);
  font-weight: 500;
  line-height: 0.8;
  letter-spacing: -0.08em;
}

.page-about .cover-foot {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(234, 244, 239, 0.22);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: 0.02em;
}

.page-about .cover-foot .meta-item {
  color: var(--cyan);
}

.page-about .about-body {
  display: grid;
  gap: 0;
  padding-bottom: clamp(52px, 8vw, 96px);
}

.page-about .about-rail {
  min-width: 0;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}

.page-about .rail-title {
  margin: 0 0 12px;
  color: var(--muted);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-about .rail-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-600) transparent;
}

.page-about .rail-link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-about .rail-link:hover {
  color: var(--paper);
  border-color: var(--ink-600);
  background: rgba(23, 51, 43, 0.55);
}

.page-about .rail-link[data-current] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

.page-about .rail-num {
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.page-about .rail-link[data-current] .rail-num {
  color: var(--cyan);
}

.page-about .about-content {
  min-width: 0;
}

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

.page-about .chapter:first-child {
  padding-top: clamp(22px, 4vw, 38px);
  border-top: 0;
}

.page-about .chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 16px;
  align-items: start;
  margin-bottom: 22px;
}

.page-about .chapter-index {
  padding-top: 7px;
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .chapter-title {
  margin: 0;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

.page-about .chapter-lede {
  grid-column: 2;
  max-width: 62ch;
  margin: -2px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.page-about .chapter-copy p {
  max-width: 66ch;
  margin: 0 0 1em;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

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

.page-about .pullquote {
  max-width: 56ch;
  margin: 28px 0;
  padding: 6px 0 6px 22px;
  border-left: 3px solid var(--amber);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 1.95rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.26;
}

.page-about .pullquote p {
  margin: 0;
}

.page-about .day-flow {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .day-step {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding: 17px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .day-step:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .day-time {
  padding-top: 3px;
  color: var(--cyan);
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.page-about .day-title {
  margin: 0 0 6px;
  color: var(--paper);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
}

.page-about .day-text {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.68;
}

.page-about .team-grid {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-about .team-group {
  min-width: 0;
  padding: 22px 20px;
  background: var(--ink-900);
  transition: background 220ms var(--ease);
}

.page-about .team-group:nth-child(2),
.page-about .team-group:nth-child(4) {
  background: rgba(17, 20, 23, 0.88);
}

.page-about .team-group:hover {
  background: rgba(23, 51, 43, 0.72);
}

.page-about .group-code {
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-about .group-name {
  margin: 10px 0 8px;
  color: var(--paper);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.25;
}

.page-about .group-desc {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .group-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .proof-layout {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-about .proof-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .proof-step {
  position: relative;
  margin-left: 12px;
  padding: 0 0 24px 42px;
  border-left: 1px solid var(--line-soft);
}

.page-about .proof-step:last-child {
  padding-bottom: 0;
}

.page-about .step-num {
  position: absolute;
  top: 0;
  left: -13px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--amber);
  background: var(--ink-900);
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0;
}

.page-about .proof-step--alert .step-num {
  border-color: var(--rose);
  color: var(--rose);
}

.page-about .step-title {
  margin: 0 0 6px;
  color: var(--paper);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
}

.page-about .step-text {
  max-width: 60ch;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .proof-media {
  margin: 0;
}

.page-about .proof-media .media-cap {
  margin-top: 10px;
}

.page-about .proof-source {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

.page-about .timeline-band {
  margin-top: 24px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .timeline-track {
  display: flex;
  max-width: 100%;
  margin: 0;
  padding: 0 0 16px;
  overflow-x: auto;
  list-style: none;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-600) transparent;
}

.page-about .timeline-node {
  position: relative;
  flex: 0 0 208px;
  padding: 24px 18px 16px;
  border-right: 1px solid var(--line-soft);
  scroll-snap-align: start;
  transition: background 220ms var(--ease);
}

.page-about .timeline-node:first-child {
  border-left: 1px solid var(--line-soft);
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: translateY(-50%) rotate(45deg);
}

.page-about .timeline-node:nth-child(2n)::before {
  background: var(--amber);
}

.page-about .timeline-node:hover {
  background: rgba(23, 51, 43, 0.55);
}

.page-about .node-year {
  display: block;
  color: var(--amber);
  font-family: var(--font-num);
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
}

.page-about .node-title {
  margin: 12px 0 6px;
  color: var(--paper);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.3;
}

.page-about .node-text {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.page-about .timeline-media {
  margin: 24px 0 0;
}

.page-about .timeline-media .media-cap {
  margin-top: 10px;
}

.page-about .reader-grid {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-about .reader-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 24px 20px;
  border-top: 3px solid var(--cyan);
  background: var(--ink-900);
}

.page-about .reader-card:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .reader-card:nth-child(3) {
  border-top-color: var(--muted);
}

.page-about .reader-label {
  color: var(--muted);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-about .reader-title {
  margin: 12px 0 10px;
  color: var(--paper);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.page-about .reader-text {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .reader-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  margin-top: auto;
  color: var(--cyan);
  font-size: 13px;
  text-decoration: none;
}

.page-about .reader-link::after {
  content: "→";
  transition: transform 220ms var(--ease);
}

.page-about .reader-link:hover::after {
  transform: translateX(4px);
}

.page-about .chapter--next {
  padding-bottom: 0;
  border-top: 0;
}

.page-about .cta-band {
  position: relative;
  overflow: hidden;
  margin-top: clamp(30px, 5vw, 52px);
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(23, 51, 43, 0.96), rgba(17, 20, 23, 0.96) 62%),
    var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 38px), calc(100% - 38px) 100%, 0 100%);
}

.page-about .cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(135deg, transparent 0 28px, rgba(53, 242, 208, 0.035) 28px 29px),
    radial-gradient(circle at 92% 12%, rgba(242, 184, 75, 0.12), transparent 34%);
}

.page-about .cta-copy {
  position: relative;
  z-index: 1;
  max-width: 68ch;
}

.page-about .cta-title {
  margin: 16px 0 12px;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

.page-about .cta-text {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .cta-note {
  position: relative;
  z-index: 1;
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

@media (min-width: 600px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .reader-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .proof-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(260px, 0.82fr);
    align-items: start;
  }

  .page-about .timeline-node {
    flex-basis: 230px;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(340px, 0.86fr);
    gap: clamp(44px, 6vw, 78px);
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail-width) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-rail {
    padding-top: 16px;
    border-top: 0;
    border-right: 1px solid var(--line-soft);
    padding-right: 22px;
  }

  .page-about .rail-sticky {
    position: sticky;
    top: 122px;
  }

  .page-about .rail-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .rail-list li + li {
    margin-top: 2px;
  }

  .page-about .rail-link {
    width: 100%;
    min-height: 42px;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 1px solid var(--line-soft);
    background: transparent;
  }

  .page-about .rail-link:hover {
    background: transparent;
    border-left-color: var(--ink-600);
  }

  .page-about .rail-link[data-current] {
    border-left-color: var(--cyan);
    background: transparent;
  }
}

@media (min-width: 1180px) {
  .page-about .hero-cover {
    min-height: 440px;
  }

  .page-about .timeline-node {
    flex-basis: 20%;
  }
}

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