.page-about {
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumbs {
  padding-top: clamp(14px, 2.4vw, 22px);
  padding-bottom: 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -22% -12% 38%;
  background: var(--moss);
  opacity: 0.34;
  clip-path: polygon(48% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), rgba(61, 242, 192, 0) 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about h1 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-size: clamp(30px, 6vw, 64px);
  margin: 0.3em 0 0.42em;
}

.page-about .lede {
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.72;
  max-width: 48ch;
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

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

.page-about .about-hero__figure .media-frame {
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
}

.page-about .hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  background: var(--line);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.page-about .hero-stat {
  background: var(--ink-2);
  padding: 14px 12px 16px;
}

.page-about .hero-stat dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
  margin: 0 0 8px;
}

.page-about .hero-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .hero-stat dd em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  margin-left: 4px;
}

/* ---------- 通用章节 ---------- */
.page-about .section {
  padding: clamp(44px, 7vw, 92px) 0;
}

.page-about .section--tint {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.18;
  font-size: clamp(24px, 3.6vw, 42px);
  margin: 0.3em 0 0.5em;
  max-width: 22ch;
}

.page-about .about-lede {
  max-width: 56ch;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(24px, 4vw, 42px);
}

.page-about .year-rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .year-rail ol::-webkit-scrollbar {
  display: none;
}

.page-about .year-rail a {
  display: block;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--stone);
  border: 1px solid var(--line-strong);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .year-rail a:hover,
.page-about .year-rail a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

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

.page-about .tl-node {
  position: relative;
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--moss);
  background: linear-gradient(158deg, rgba(47, 90, 69, 0.26), rgba(7, 27, 20, 0.9) 62%);
  box-shadow: var(--shadow);
  scroll-margin-top: 96px;
}

.page-about .tl-node--clay {
  border-left-color: var(--clay);
}

.page-about .tl-node--cyan {
  border-left-color: var(--cyan);
}

.page-about .tl-node + .tl-node {
  margin-top: 14px;
}

.page-about .tl-node__year {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  color: var(--cyan);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.page-about .tl-node--clay .tl-node__year {
  color: var(--clay);
}

.page-about .tl-node--moss .tl-node__year {
  color: var(--mist);
}

.page-about .tl-node__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 2.1vw, 22px);
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .tl-node__text {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .tl-more {
  margin-top: 16px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-about .tl-more > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

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

.page-about .tl-more > summary::before {
  content: "+";
  font-size: 15px;
  line-height: 1;
}

.page-about .tl-more[open] > summary::before {
  content: "–";
}

.page-about .tl-more ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.78;
}

.page-about .tl-more li + li {
  margin-top: 6px;
}

.page-about .timeline__figure {
  margin: 22px 0 0;
}

.page-about .timeline__figure .media-frame {
  border: 1px solid var(--line);
}

.page-about .timeline__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

/* ---------- 内容体系 ---------- */
.page-about .library-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-about .library-map {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: clamp(14px, 2.4vw, 24px);
  box-shadow: var(--shadow);
}

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

.page-about .library-facts {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .fact {
  background: var(--ink);
  padding: clamp(16px, 2.4vw, 24px);
}

.page-about .fact__title {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--stone);
  margin: 0 0 8px;
  font-weight: 500;
}

.page-about .fact__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1;
  color: var(--flame);
}

.page-about .fact__num em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  margin-left: 4px;
}

.page-about .fact__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .cluster-block {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .cluster-block__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 20px);
  margin: 0 0 14px;
  color: var(--paper);
}

.page-about .cluster-strip {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 0 14px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .cluster {
  flex: 0 0 min(258px, 76vw);
  scroll-snap-align: start;
  border: 1px solid var(--line);
  border-top: 2px solid var(--moss);
  background: rgba(47, 90, 69, 0.22);
  padding: 16px;
}

.page-about .cluster__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  margin: 10px 0 6px;
  color: var(--paper);
}

.page-about .cluster__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .crew-head {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

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

.page-about .crew-figure .media-frame {
  border: 1px solid var(--line-strong);
}

.page-about .crew-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-about .beats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .beat {
  background: var(--ink-2);
  padding: clamp(16px, 2.6vw, 28px);
}

.page-about .beat__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--flame);
}

.page-about .beat__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .beat__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .crew-groups {
  margin-top: clamp(24px, 3.6vw, 40px);
  border-left: 2px solid var(--clay);
  padding: clamp(14px, 2.2vw, 22px) clamp(16px, 2.6vw, 26px);
  background: rgba(208, 122, 87, 0.08);
}

.page-about .crew-groups__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 12px;
  color: var(--paper);
}

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

.page-about .crew-list li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper);
  border: 1px solid var(--line-strong);
  padding: 5px 10px;
}

.page-about .crew-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 协作 ---------- */
.page-about .coop-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-about .coop-card {
  border: 1px solid var(--line);
  background: var(--ink);
  padding: clamp(16px, 2.4vw, 24px);
  box-shadow: var(--shadow);
}

.page-about .coop-card__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  margin: 10px 0 8px;
  color: var(--paper);
}

.page-about .coop-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .honor {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  margin-top: clamp(22px, 3.4vw, 36px);
  padding: 16px 18px;
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--cyan);
  background: rgba(61, 242, 192, 0.06);
}

.page-about .honor__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .honor__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  flex: 1 1 240px;
}

/* ---------- 入口 ---------- */
.page-about .entry-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-about .entry-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: clamp(16px, 2.4vw, 24px);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .entry-card:hover,
.page-about .entry-card:focus-visible {
  border-color: var(--cyan);
  background: rgba(61, 242, 192, 0.07);
  transform: translateY(-2px);
}

.page-about .entry-card__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
  margin-bottom: 10px;
}

.page-about .entry-card__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .entry-card__text {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .entry-card__go {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-base {
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 6px;
}

.page-about .about-base p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--stone);
  overflow-wrap: anywhere;
}

.page-about .about-base__icp {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }

  .page-about .timeline {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 44px);
  }

  .page-about .year-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .year-rail ol {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .year-rail a {
    border: 0;
    border-left: 1px solid var(--line-strong);
    padding: 12px 14px;
    font-size: 20px;
  }

  .page-about .year-rail a:hover,
  .page-about .year-rail a:focus-visible {
    border-left-color: var(--cyan);
  }

  .page-about .library-grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, 0.76fr);
    align-items: start;
  }

  .page-about .library-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .crew-head {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
  }

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

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

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

  .page-about .about-base {
    grid-template-columns: auto 1fr auto;
    gap: 8px 24px;
    align-items: baseline;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .entry-card,
  .page-about .year-rail a {
    transition: none;
  }

  .page-about .entry-card:hover {
    transform: none;
  }

  .page-about .cluster-strip {
    scroll-snap-type: none;
  }
}
<<<END>>>