.page-about {
  --about-hair: rgba(158, 176, 204, 0.16);
  --about-amber: rgba(255, 122, 47, 0.12);
  --about-cyan-soft: rgba(40, 230, 210, 0.34);
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-about .section {
  padding-block: clamp(38px, 6vw, 78px);
}

.page-about .about-topbar {
  padding-top: clamp(16px, 3vw, 30px);
}

.page-about .breadcrumbs {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

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

.page-about .eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0;
}

.page-about h1 {
  font-family: var(--f-title);
  font-size: clamp(38px, 8.4vw, 84px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 14px 0 0;
}

.page-about h1 .hl {
  display: block;
  color: var(--cyan);
}

.page-about .lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-stamp {
  display: none;
}

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

.page-about .track-head {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .year-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .year-jump a {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .year-jump a:hover,
.page-about .year-jump a:focus-visible {
  color: var(--cyan);
  border-color: var(--about-cyan-soft);
  outline: none;
}

.page-about .timeline {
  --tl-pad: clamp(20px, 3vw, 34px);
  margin: 0;
  padding: 4px 0 0 var(--tl-pad);
  list-style: none;
  border-left: 1px solid var(--about-hair);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 4vw, 42px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: calc(-1 * var(--tl-pad) - 5px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--alert);
  box-shadow: 0 0 0 5px var(--about-amber);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--alert);
  line-height: 1;
}

.page-about .timeline__title {
  margin: 10px 0 8px;
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 700;
  color: var(--text);
}

.page-about .timeline__body {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-wide-wrap {
  margin-top: clamp(34px, 6vw, 70px);
}

.page-about .about-wide {
  margin: 0;
}

.page-about .about-wide img {
  display: block;
  width: 100%;
  height: clamp(170px, 36vw, 440px);
  object-fit: cover;
  max-width: 100%;
  border-radius: var(--r-lg);
}

.page-about .media__caption {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-about .section-title {
  margin: 0;
  font-family: var(--f-title);
  font-size: clamp(26px, 4.2vw, 44px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .sect-note {
  margin: 14px 0 0;
  max-width: 52em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .steps {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 30px);
  padding: clamp(18px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .step__idx {
  padding-top: 5px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--alert);
}

.page-about .step h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  color: var(--text);
}

.page-about .step p {
  margin: 0;
  max-width: 48em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure img,
.page-about .coverage-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-md);
}

.page-about .flow {
  display: grid;
  gap: 0;
}

.page-about .flow__row {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-top: 1px solid var(--about-hair);
}

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

.page-about .flow__key {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .flow__row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-coverage {
  background: linear-gradient(180deg, rgba(16, 26, 51, 0.9), rgba(8, 13, 28, 0.1));
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .board__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 3vw, 28px);
  background: var(--ink);
}

.page-about .board__num {
  font-family: var(--f-mono);
  font-size: clamp(26px, 5.2vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .board__num--alert {
  color: var(--alert);
}

.page-about .board__unit {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .scenes {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  margin-top: clamp(30px, 4.5vw, 48px);
}

.page-about .scene {
  padding-left: 16px;
  border-left: 2px solid var(--about-cyan-soft);
}

.page-about .scene h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.page-about .scene p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .coverage-figure {
  margin: clamp(30px, 4.5vw, 48px) 0 0;
}

.page-about .coverage-figure .media__caption {
  margin-top: 10px;
}

.page-about .ecosystem {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

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

.page-about .net-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .net-svg text {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  fill: var(--muted);
}

.page-about .net-svg .net-core-label {
  font-size: 12px;
  letter-spacing: 0.18em;
  fill: var(--text);
}

.page-about .net-svg .net-foot {
  font-size: 10px;
  letter-spacing: 0.14em;
  fill: var(--violet);
}

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

.page-about .eco-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .eco-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .eco-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .next-links {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--about-hair);
}

.page-about .next-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(16px, 2.6vw, 22px) 0;
  border-bottom: 1px solid var(--about-hair);
  text-decoration: none;
}

.page-about .next-link__label {
  font-family: var(--f-title);
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color 0.2s ease;
}

.page-about .next-link__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .next-link:hover .next-link__label,
.page-about .next-link:focus-visible .next-link__label {
  color: var(--cyan);
}

.page-about .next-link:focus-visible {
  outline: 2px solid var(--cyan-hi);
  outline-offset: 4px;
}

.page-about .to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(72px, 13vw, 32px);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  background: var(--deck);
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, color 0.2s ease;
}

.page-about .to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.page-about .to-top:hover {
  color: var(--cyan);
}

.page-about .to-top__arrow {
  font-size: 13px;
  color: var(--cyan);
}

@media (min-width: 720px) {
  .page-about .next-link {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: baseline;
    gap: 24px;
  }

  .page-about .scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-lead {
    position: sticky;
    top: 118px;
  }

  .page-about .about-stamp {
    display: block;
    margin: 46px 0 0;
    writing-mode: vertical-rl;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    color: var(--violet);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

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

  .page-about .ecosystem {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .to-top,
  .page-about .year-jump a,
  .page-about .next-link__label {
    transition: none;
  }
}
<<<END>>>