.page-about {
  --ab-line: rgba(16, 28, 51, 0.16);
  --ab-line-soft: rgba(16, 28, 51, 0.08);
  --ab-rail-w: 176px;
  background: var(--paper);
  color: var(--ink);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}
.page-about .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--orange);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--ink);
}

/* Hero */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 30px) 0 clamp(30px, 5vw, 54px);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 4% -14% 18% 40%;
  background: linear-gradient(125deg, rgba(30, 122, 75, 0.13), rgba(217, 242, 75, 0.22) 52%, rgba(228, 86, 31, 0.10) 100%);
  border-radius: 48px;
  transform: rotate(-4deg);
  z-index: 0;
  pointer-events: none;
}
.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}
.page-about .hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
  margin-top: 18px;
}
.page-about .hero-copy h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 12px 0 18px;
  max-width: 16ch;
  transform: skewX(-3deg);
  transform-origin: left bottom;
}
.page-about .hero-lead {
  max-width: 44ch;
  margin: 0 0 24px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--ink-70);
}
.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .hero-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.page-about .fig-cell {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px 16px;
  background: var(--white);
}
.page-about .fig-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--grass);
}
.page-about .fig-lab {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}
.page-about .fig-cell--ink {
  background: var(--ink);
}
.page-about .fig-cell--ink .fig-num {
  color: var(--neon);
}
.page-about .fig-cell--ink .fig-lab {
  color: var(--bone-70);
}
.page-about .fig-cell--lime {
  background: var(--neon);
}
.page-about .fig-cell--lime .fig-num {
  color: var(--ink);
}
.page-about .fig-cell--lime .fig-lab {
  color: var(--ink-70);
}

/* Body layout */
.page-about .about-body {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(40px, 7vw, 84px);
}
.page-about .about-rail {
  display: none;
}
.page-about .rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}
.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--ab-line);
}
.page-about .rail-list a {
  display: block;
  margin-left: -2px;
  padding: 8px 0 8px 14px;
  border-left: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--slate);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--orange);
  border-left-color: var(--orange);
}

.page-about .about-path {
  position: relative;
  margin-left: 4px;
  padding-left: 24px;
  border-left: 2px solid var(--ab-line);
}
.page-about .chap {
  position: relative;
  padding-bottom: clamp(38px, 6vw, 70px);
  scroll-margin-top: 96px;
}
.page-about .chap:last-child {
  padding-bottom: 0;
}
.page-about .chap::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--clay);
  box-shadow: 0 0 0 4px var(--paper);
  z-index: 1;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}
.page-about .chap:target::before {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.4);
}
.page-about .chap h2 {
  margin: 8px 0 16px;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  max-width: 20ch;
}
.page-about .prose p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-70);
}
.page-about .prose p:last-child {
  margin-bottom: 0;
}
.page-about .prose a {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Origin */
.page-about .chap-split {
  display: grid;
  gap: 20px;
  margin-top: 4px;
}
.page-about .about-fig {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--field);
  box-shadow: var(--shadow);
}
.page-about .about-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-fig--band {
  margin-top: 24px;
}
.page-about .about-fig--net {
  background: var(--paper-2);
}

/* Phases */
.page-about .phase-grid {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
}
.page-about .phase {
  position: relative;
  padding: 22px 20px 28px;
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  transition: transform 0.3s var(--ease), filter 0.3s var(--ease);
}
.page-about .phase:hover,
.page-about .phase:focus-within {
  transform: translateY(-4px);
  filter: saturate(1.12);
}
.page-about .phase--1 {
  background: var(--grass);
}
.page-about .phase--2 {
  background: var(--ink);
}
.page-about .phase--3 {
  background: var(--clay);
}
.page-about .phase-year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(247, 242, 230, 0.82);
}
.page-about .phase--2 .phase-year {
  color: var(--neon);
}
.page-about .phase h3 {
  margin: 0 0 8px;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .phase p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(247, 242, 230, 0.84);
}

/* Timeline ticks */
.page-about .tick-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}
.page-about .tick-list li {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px solid var(--ab-line-soft);
}
.page-about .tick-list li:first-child {
  border-top: 1px solid var(--ab-line);
}
.page-about .tick-year {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
}
.page-about .tick-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-70);
}

/* Team */
.page-about .team-grid {
  display: grid;
  gap: 26px;
  align-items: center;
  margin-top: 6px;
}
.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .team-row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 14px 0;
  border-top: 1px solid var(--ab-line-soft);
}
.page-about .team-row:first-child {
  border-top: 1px solid var(--ab-line);
}
.page-about .team-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--grass);
}
.page-about .team-row h3 {
  margin: 0;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.page-about .team-row p {
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-70);
}
.page-about .flow-svg {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
}
.page-about .fl-link {
  stroke: var(--line-strong);
  stroke-width: 2;
}
.page-about .fl-link--dash {
  stroke: var(--ab-line);
  stroke-dasharray: 5 6;
}
.page-about .fl-node {
  stroke: var(--paper);
  stroke-width: 3;
}
.page-about .fl-node--grass {
  fill: var(--grass);
}
.page-about .fl-node--teal {
  fill: var(--teal);
}
.page-about .fl-node--clay {
  fill: var(--clay);
}
.page-about .fl-label {
  fill: var(--white);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  text-anchor: middle;
}
.page-about .fl-sub {
  fill: rgba(255, 255, 255, 0.82);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-anchor: middle;
}

/* Network */
.page-about .net-grid {
  display: grid;
  gap: 22px;
  align-items: center;
  margin-top: 4px;
}

/* Awards */
.page-about .award-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}
.page-about .award-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--ab-line-soft);
}
.page-about .award-list li:first-child {
  border-top: 1px solid var(--ab-line);
}
.page-about .award-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--clay);
  padding-top: 3px;
}
.page-about .award-list p {
  flex: 1 1 220px;
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-70);
}
.page-about .award-tail {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--slate);
}
.page-about .award-tail a {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Next band */
.page-about .next-band {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 38px);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
}
.page-about .next-band::before {
  content: "";
  position: absolute;
  right: -10%;
  top: -34%;
  width: 56%;
  height: 168%;
  transform: rotate(-6deg);
  background: linear-gradient(150deg, rgba(30, 122, 75, 0.5), rgba(217, 242, 75, 0.12) 55%, transparent 78%);
  pointer-events: none;
}
.page-about .next-band > * {
  position: relative;
  z-index: 1;
}
.page-about .next-band h2 {
  margin: 0 0 20px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.24;
  color: var(--paper);
  max-width: 18ch;
}
.page-about .next-band h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--neon);
}
.page-about .next-band p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--bone-70);
}
.page-about .next-band p:last-child {
  margin-bottom: 0;
}
.page-about .next-band a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .next-grid {
  display: grid;
  gap: 20px;
  margin-bottom: 18px;
}

/* Year ruler */
.page-about .year-ruler {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 26px;
  padding-top: 12px;
  border-top: 2px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.page-about .year-ruler span {
  position: relative;
}
.page-about .year-ruler span::before {
  content: "";
  position: absolute;
  left: 0;
  top: -12px;
  width: 2px;
  height: 8px;
  background: var(--clay);
}

@media (min-width: 640px) {
  .page-about .tick-list li {
    grid-template-columns: 74px minmax(0, 1fr);
    align-items: baseline;
    gap: 6px 18px;
  }
  .page-about .award-list li {
    flex-wrap: nowrap;
  }
}

@media (min-width: 760px) {
  .page-about .chap-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-about .phase-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) 260px;
  }
  .page-about .net-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }
  .page-about .next-grid {
    grid-template-columns: 1fr 1fr;
    gap: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .about-path {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .phase,
  .page-about .chap::before,
  .page-about .rail-list a {
    transition: none;
  }
  .page-about .phase:hover,
  .page-about .phase:focus-within,
  .page-about .chap:target::before {
    transform: none;
  }
}
<<<END>>>