.page-about {
  --about-measure: 68ch;
  padding-bottom: clamp(24px, 5vw, 56px);
}

.page-about .crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 14px;
  padding-bottom: clamp(22px, 4vw, 36px);
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: var(--about-measure);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-banner {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-banner figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-banner--sub img {
  aspect-ratio: 3 / 2;
}

/* 布局：左侧索引轨道 + 单列年鉴式正文 */
.page-about .about-shell {
  display: grid;
  gap: clamp(20px, 4vw, 48px);
  padding-top: clamp(24px, 4vw, 48px);
}

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

.page-about .about-rail__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .about-rail__num {
  color: var(--teal-deep);
  font-size: 11px;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--teal);
  color: var(--text);
  transform: translateY(-2px);
}

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

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

/* 小节 */
.page-about .yr {
  padding-block: clamp(24px, 4vw, 42px);
  border-top: 1px solid var(--line);
}

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

.page-about .yr__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .yr__num {
  font-size: clamp(18px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--teal);
}

.page-about .yr h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 33px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .yr__anchor {
  margin-left: 8px;
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 0.6em;
  text-decoration: none;
  transition: color var(--t) var(--ease);
}

.page-about .yr__anchor:hover,
.page-about .yr__anchor:focus-visible {
  color: var(--teal);
}

.page-about .prose p {
  margin: 0 0 14px;
  max-width: var(--about-measure);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

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

.page-about .serif-note {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--teal);
  max-width: var(--about-measure);
  font-family: var(--font-serif);
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.7;
  color: var(--cream);
}

/* 五条路 */
.page-about .routes {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .route {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--t) var(--ease);
}

.page-about .route__n {
  color: var(--teal);
  font-size: 12px;
}

.page-about .route__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}

.page-about .route__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .route:hover .route__name {
  color: var(--teal);
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  gap: 18px;
}

.page-about .team-grid .about-banner {
  margin-top: 2px;
}

.page-about .factbar {
  display: grid;
  gap: 1px;
  margin-top: 20px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .factbar__cell {
  padding: 14px 16px;
  background: var(--panel);
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-about .factbar__cell:hover,
.page-about .factbar__cell:focus-within {
  background: var(--ink);
  box-shadow: inset 0 0 0 1px var(--teal);
}

.page-about .factbar__v {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

.page-about .factbar__k {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text);
}

.page-about .factbar__note {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* 赛后时间线 */
.page-about .timeline {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .tl {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 12px 14px;
  background: var(--panel);
}

.page-about .tl__t {
  grid-row: 1 / span 2;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .tl__h {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
}

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

/* 结构升级 */
.page-about .upgrades {
  margin: 20px 0 0;
  padding: 0 0 0 18px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .upg {
  position: relative;
  padding-bottom: 18px;
}

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

.page-about .upg::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--teal);
}

.page-about .upg__n {
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-about .upg p {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 反色数据面 */
.page-about .cream-block {
  margin-top: 20px;
  padding: clamp(16px, 3vw, 26px);
  background: var(--cream);
  color: var(--ink);
  border-left: 3px solid var(--amber);
}

.page-about .cream-block h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .cream-block p {
  margin: 0 0 12px;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .cream-block__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-about .cream-block .btn--inline {
  color: var(--ink);
  border-color: var(--ink);
}

.page-about .cream-block .btn--inline:hover,
.page-about .cream-block .btn--inline:focus-visible {
  background: var(--ink);
  color: var(--cream);
}

/* 收束入口 */
.page-about .about-cta {
  padding-top: clamp(28px, 5vw, 52px);
  border-top: 1px solid var(--line);
  margin-top: clamp(20px, 4vw, 40px);
}

.page-about .about-cta__head {
  margin-bottom: 18px;
}

.page-about .about-cta__head h2 {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.25;
  color: var(--text);
  letter-spacing: -0.01em;
}

.page-about .about-cta__links {
  display: grid;
  gap: 10px;
}

.page-about .about-cta__link {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-decoration: none;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  border-color: var(--teal);
  transform: translateY(-2px);
}

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

.page-about .about-cta__k {
  font-size: 12px;
  color: var(--teal-deep);
}

.page-about .about-cta__t {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}

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

/* 断点 */
@media (min-width: 640px) {
  .page-about .about-cta__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .factbar {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
  }
}

@media (min-width: 760px) {
  .page-about .route {
    grid-template-columns: 40px 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-shell {
    grid-template-columns: 172px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 84px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__link {
    border: 0;
    border-left: 2px solid var(--line);
    background: transparent;
    padding: 8px 10px;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--teal);
    background: var(--panel);
    transform: none;
  }

  .page-about .timeline {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
  }

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

  .page-about .tl__t {
    grid-row: auto;
    margin-bottom: 6px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-cta__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .route,
  .page-about .factbar__cell,
  .page-about .about-cta__link,
  .page-about .yr__anchor {
    transition: none;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-cta__link:hover {
    transform: none;
  }
}
<<<END>>>