.page-about {
  --about-rail: 96px;
  background: var(--hs-ink);
  color: var(--hs-text);
  padding-bottom: clamp(56px, 8vw, 112px);
  font-family: var(--hs-font-ui);
  overflow-x: clip;
}

.page-about .about-crumb {
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: 24px var(--hs-gutter) 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: 24px var(--hs-gutter) 56px;
  display: grid;
  gap: 18px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 var(--hs-gutter) auto;
  height: 1px;
  background: linear-gradient(90deg, var(--hs-brand) 0 22%, var(--hs-line) 22% 100%);
  opacity: .7;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(28px, 6.4vw, 46px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--hs-text);
  max-width: 18em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--hs-text-2);
}

.page-about .about-hero__facts {
  margin: 12px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
  clip-path: var(--hs-cut-sm);
}

.page-about .about-hero__fact {
  background: var(--hs-panel);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__fact dt {
  font-family: var(--hs-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--hs-cool);
}

.page-about .about-hero__fact dd {
  margin: 0;
  font-family: var(--hs-font-num);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: -0.01em;
  color: var(--hs-text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-num {
  color: var(--hs-brand);
}

.page-about .about-num--data {
  color: var(--hs-data);
}

/* ---------- 通用 rail 布局 ---------- */

.page-about .about-rail {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-rail__label {
  font-family: var(--hs-font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--hs-brand);
}

.page-about .about-rail__title {
  margin: 0;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 48px) var(--hs-gutter);
  border-top: 1px solid var(--hs-line);
}

.page-about .about-origin__body {
  display: grid;
  gap: 14px;
  max-width: 34em;
  padding-left: 0;
}

.page-about .about-origin__body p {
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--hs-text);
}

.page-about .about-origin__body p:first-child {
  color: var(--hs-text);
  font-size: 20px;
  font-weight: 600;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) var(--hs-gutter);
  border-top: 1px solid var(--hs-line);
}

.page-about .about-timeline h2 {
  margin: 12px 0 24px;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.page-about .about-timeline__media {
  margin: 0 0 28px;
  aspect-ratio: 4 / 3;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
}

.page-about .about-timeline__item {
  position: relative;
  background: var(--hs-panel);
  display: grid;
  grid-template-columns: var(--about-rail) 1fr;
  align-items: start;
  padding: 20px 18px 20px 0;
  transition: background var(--hs-speed) ease;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-rail) - 1px);
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--hs-line);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: calc(var(--about-rail) - 5px);
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--hs-ink);
  border: 1px solid var(--hs-cool);
  transform: rotate(45deg);
  transition: background var(--hs-speed) ease, border-color var(--hs-speed) ease;
}

.page-about .about-timeline__item:hover::after,
.page-about .about-timeline__item[data-active]::after {
  background: var(--hs-brand);
  border-color: var(--hs-brand);
}

.page-about .about-timeline__item[data-active] {
  background: linear-gradient(180deg, rgba(41, 242, 196, .06), rgba(41, 242, 196, 0));
}

.page-about .about-timeline__ver {
  font-family: var(--hs-font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--hs-cool);
  padding-left: 18px;
  padding-top: 4px;
}

.page-about .about-timeline__item[data-active] .about-timeline__ver {
  color: var(--hs-brand);
}

.page-about .about-timeline__body {
  padding-left: 20px;
}

.page-about .about-timeline__body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--hs-text);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hs-text-2);
  max-width: 42em;
}

/* ---------- 数据口径 ---------- */

.page-about .about-source {
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) var(--hs-gutter);
  border-top: 1px solid var(--hs-line);
}

.page-about .about-source h2 {
  margin: 12px 0 24px;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.page-about .about-source__grid {
  gap: 24px;
}

.page-about .about-source__prose {
  max-width: 34em;
}

.page-about .about-source__prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--hs-text-2);
}

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

.page-about .about-source__panel {
  padding: 20px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-source__layers {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-fields {
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

.page-about .about-fields__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
}

.page-about .about-fields__row {
  background: var(--hs-panel);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 14px 18px;
  font-size: 15px;
  transition: background var(--hs-speed) ease;
}

.page-about .about-fields__row:hover,
.page-about .about-fields__row:focus-visible {
  background: #142c25;
  outline: none;
}

.page-about .about-fields__row:focus-visible {
  box-shadow: inset 0 0 0 2px var(--hs-brand);
}

.page-about .about-fields__key {
  font-family: var(--hs-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--hs-cool);
  text-transform: uppercase;
  flex: 0 0 auto;
}

.page-about .about-fields__vals {
  text-align: right;
  color: var(--hs-brand);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.page-about .about-fields__row--data .about-fields__vals {
  color: var(--hs-data);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) var(--hs-gutter);
  border-top: 1px solid var(--hs-line);
}

.page-about .about-team h2 {
  margin: 12px 0 24px;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.page-about .about-team__layout {
  display: grid;
  gap: 24px;
}

.page-about .about-team__media {
  margin: 0;
  aspect-ratio: 5 / 7;
}

.page-about .about-team__list {
  display: grid;
  gap: 1px;
  background: var(--hs-line);
  border: 1px solid var(--hs-line);
  align-content: start;
}

.page-about .about-team__member {
  background: var(--hs-panel);
  padding: 18px;
  display: grid;
  gap: 8px;
}

.page-about .about-team__member h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--hs-text);
}

.page-about .about-team__member p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--hs-text-2);
}

.page-about .about-team__member .hs-tag {
  justify-self: start;
}

.page-about .about-team__note {
  margin: 0;
  padding: 16px 18px;
  background: var(--hs-turf);
  border-top: 1px solid var(--hs-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--hs-amber);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage {
  max-width: var(--hs-shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) var(--hs-gutter);
  border-top: 1px solid var(--hs-line);
}

.page-about .about-coverage h2 {
  margin: 12px 0 24px;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.page-about .about-coverage__media {
  margin: 0 0 28px;
  aspect-ratio: 7 / 4;
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-coverage__panel {
  padding: 20px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-coverage__sports {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--hs-line);
}

.page-about .about-coverage__sports li {
  background: var(--hs-ink);
  padding: 12px 8px;
  text-align: center;
  font-size: 14px;
  color: var(--hs-text);
  letter-spacing: .02em;
}

.page-about .about-coverage__stats {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-coverage__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--hs-cool);
  border-top: 1px dashed var(--hs-line);
  padding-top: 10px;
}

/* ---------- 结尾约定 ---------- */

.page-about .about-pact {
  max-width: var(--hs-shell);
  margin: 24px auto 0;
  padding: clamp(36px, 6vw, 64px) var(--hs-gutter);
  background: linear-gradient(135deg, #0e2620 0%, #08120f 100%);
  border-top: 1px solid var(--hs-line);
  border-bottom: 1px solid var(--hs-line);
  display: grid;
  gap: 18px;
}

.page-about .about-pact__text {
  margin: 0;
  font-size: clamp(22px, 5vw, 36px);
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--hs-brand);
  max-width: 22em;
}

.page-about .about-pact__sub {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--hs-text-2);
}

.page-about .about-link {
  color: var(--hs-brand);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 242, 196, .45);
  padding-bottom: 1px;
  transition: border-color var(--hs-speed) ease, color var(--hs-speed) ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-bottom-color: var(--hs-brand);
  outline: none;
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--hs-brand);
  outline-offset: 3px;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-rail {
    grid-template-columns: var(--about-rail) 1fr;
    align-items: baseline;
    gap: 20px;
    border-left: 2px solid var(--hs-brand);
    padding-left: 18px;
  }

  .page-about .about-rail__label {
    padding-top: 6px;
  }

  .page-about .about-origin__body {
    padding-left: calc(var(--about-rail) + 38px);
  }

  .page-about .about-source__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 32px;
  }

  .page-about .about-timeline__item {
    padding: 24px 24px 24px 0;
  }

  .page-about .about-timeline__body {
    padding-left: 28px;
  }

  .page-about .about-coverage__sports {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-fields__row,
  .page-about .about-link {
    transition: none;
  }
}