.page-about {
  --about-rule: rgba(43, 33, 24, 0.16);
  --about-rule-soft: rgba(43, 33, 24, 0.08);
  --about-shadow-card: 6px 6px 0 rgba(43, 33, 24, 0.14);
  --about-shadow-hover: 9px 9px 0 rgba(43, 33, 24, 0.18);
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  font-size: 13px;
  color: var(--mist);
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 6px;
  color: var(--mist);
  opacity: 0.7;
}

.page-about .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
}

.page-about .breadcrumbs__link:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: calc(var(--header-h) + 30px) 0 56px;
  border-bottom: 2px solid var(--ink);
  background:
    radial-gradient(circle at 88% 6%, rgba(255, 107, 53, 0.14), transparent 52%),
    linear-gradient(180deg, rgba(255, 217, 61, 0.18), transparent 46%),
    var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: 20px;
}

.page-about .about-hero .display-title {
  margin: 14px 0 0;
  font-size: clamp(32px, 5.8vw, 58px);
  line-height: 1.14;
  max-width: 22ch;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__panel {
  position: relative;
  padding: 26px 22px 28px;
  background: var(--paper-2);
  border: 2px solid var(--ink);
  box-shadow: var(--about-shadow-card);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(43, 33, 24, 0.06) 1px, transparent 1px);
  background-size: 100% 26px;
  pointer-events: none;
}

.page-about .about-hero__stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-top: 10px;
  border-top: 3px solid var(--ink);
}

.page-about .about-stat--a { border-top-color: var(--brick); }
.page-about .about-stat--b { border-top-color: var(--blue); }
.page-about .about-stat--c { border-top-color: var(--charcoal); }
.page-about .about-stat--d { border-top-color: var(--green); }

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.4;
  color: var(--mist);
}

/* ---------- 大字号引言 ---------- */
.page-about .about-open {
  padding: 60px 0 56px;
  background: var(--paper);
}

.page-about .about-open__quote {
  margin: 0;
  max-width: 34ch;
  padding-left: 20px;
  border-left: 6px solid var(--orange);
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 34px);
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-open__mark {
  background: linear-gradient(180deg, transparent 58%, rgba(255, 217, 61, 0.75) 58%);
  color: inherit;
  font-weight: 700;
}

.page-about .about-open__body {
  display: grid;
  gap: 16px;
  max-width: 62ch;
  margin-top: 32px;
  padding-left: 20px;
}

.page-about .about-open__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  max-width: 640px;
  margin-bottom: 38px;
}

.page-about .about-head__note {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-history {
  padding: 68px 0;
  background: var(--paper-2);
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.page-about .about-timeline {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.page-about .about-tl {
  position: relative;
  padding-left: 20px;
  border-left: 2px solid var(--about-rule);
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 16px;
  width: 12px;
  height: 12px;
  background: var(--paper-2);
  border: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: border-color 240ms var(--ease), background-color 240ms var(--ease);
}

.page-about .about-tl:hover::before,
.page-about .about-tl:focus-within::before {
  border-color: var(--orange);
  background: var(--lemon);
}

.page-about .about-tl.reveal.is-visible::before {
  border-color: var(--orange);
}

.page-about .about-tl__btn {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  padding: 0 0 4px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
}

.page-about .about-tl__btn:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-about .about-tl__year {
  flex: 0 0 auto;
  padding: 2px 9px 3px;
  background: var(--lemon);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-tl__title {
  flex: 1 1 200px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-tl__btn .disclosure__icon {
  flex: 0 0 auto;
  margin-left: auto;
  align-self: center;
}

.page-about .about-tl__summary {
  margin: 4px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-tl__panel {
  margin-top: 14px;
  padding: 16px 18px;
  background: var(--paper);
  border-left: 4px solid var(--orange);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-tl__panel p {
  margin: 0;
}

.page-about .about-timeline__figure {
  margin: 6px 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 68px 0;
  background: var(--paper);
}

.page-about .about-team__figure {
  margin: 0 0 40px;
}

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

.page-about .about-role {
  --about-ty: 0px;
  position: relative;
  padding: 24px 22px 26px;
  background: var(--paper-2);
  border: 2px solid var(--ink);
  box-shadow: var(--about-shadow-card);
  transform: translateY(var(--about-ty));
  transition: transform 190ms var(--ease), box-shadow 190ms var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(calc(var(--about-ty) - 4px));
  box-shadow: var(--about-shadow-hover);
}

.page-about .about-role__badge {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 9px;
  background: var(--charcoal);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .about-role__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage {
  padding: 68px 0;
  background: var(--charcoal);
  color: var(--paper);
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-coverage .eyebrow {
  color: var(--lemon);
}

.page-about .about-coverage .section-title {
  color: var(--paper);
  margin-top: 12px;
  max-width: 18ch;
}

.page-about .about-coverage__copy p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 247, 236, 0.86);
}

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

.page-about .about-map__grid line {
  stroke: rgba(255, 255, 255, 0.09);
  stroke-width: 1;
}

.page-about .about-map__dots circle {
  fill: var(--orange);
  opacity: 0.9;
  transition: opacity 160ms var(--ease);
}

.page-about .about-map__dots circle:nth-child(3n) { fill: var(--blue); }
.page-about .about-map__dots circle:nth-child(4n) { fill: var(--lemon); }
.page-about .about-map__dots circle:nth-child(7n) { fill: var(--green); }

.page-about .about-sports {
  margin-top: 46px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.page-about .about-sports__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--paper);
}

.page-about .about-sports__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-sport {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 14px;
  color: var(--paper);
  cursor: default;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-sport:hover {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--charcoal);
}

.page-about .about-sport__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  transition: transform 160ms var(--ease);
}

.page-about .about-sport:hover .about-sport__dot {
  transform: scale(1.5);
  background: var(--charcoal);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partners {
  padding: 68px 0;
  background: var(--paper);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-partners__text {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-honor {
  padding: 26px 24px 28px;
  background: var(--charcoal);
  color: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--about-shadow-card);
}

.page-about .about-honor__eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lemon);
}

.page-about .about-honor__list {
  display: grid;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-honor__list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 15px;
  line-height: 1.65;
  color: rgba(255, 247, 236, 0.92);
}

.page-about .about-honor__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-honor__year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--orange);
}

/* ---------- 做事方式 ---------- */
.page-about .about-principles {
  padding: 68px 0;
  background: var(--paper-2);
  border-top: 2px solid var(--ink);
}

.page-about .about-principles__grid {
  display: grid;
  gap: 38px;
}

.page-about .about-principles__list {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-principle:first-child {
  border-top: 2px solid var(--ink);
}

.page-about .about-principle__num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--brick);
}

.page-about .about-principle__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-principle__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

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

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 60px 0 70px;
  background: var(--paper);
  border-top: 2px solid var(--ink);
}

.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  padding: 38px 24px 36px;
  background: var(--charcoal);
  color: var(--paper);
}

.page-about .about-cta__inner::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 240px;
  height: 240px;
  background: var(--orange);
  transform: rotate(24deg);
  opacity: 0.18;
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta__text {
  position: relative;
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 247, 236, 0.88);
}

.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-cta__note {
  position: relative;
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 247, 236, 0.72);
}

.page-about .about-cta__note a {
  color: var(--lemon);
  text-decoration: underline;
}

.page-about .about-cta__note a:hover {
  color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 18px;
  }

  .page-about .about-stat__num {
    font-size: 30px;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 24px;
    padding-bottom: 34px;
  }

  .page-about .about-role:nth-child(2) {
    --about-ty: 18px;
  }

  .page-about .about-role:nth-child(3) {
    --about-ty: -8px;
  }

  .page-about .about-role:nth-child(4) {
    --about-ty: 10px;
  }

  .page-about .about-cta__inner {
    padding: 48px 44px 46px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 44px);
    padding-bottom: 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    gap: 54px;
    align-items: end;
    margin-top: 30px;
  }

  .page-about .about-hero__panel {
    padding: 30px 26px 32px;
  }

  .page-about .about-open {
    padding: 84px 0 76px;
  }

  .page-about .about-open__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
    max-width: none;
  }

  .page-about .about-history,
  .page-about .about-team,
  .page-about .about-coverage,
  .page-about .about-partners,
  .page-about .about-principles {
    padding-top: 88px;
    padding-bottom: 88px;
  }

  .page-about .about-timeline {
    gap: 30px;
  }

  .page-about .about-tl {
    padding-left: 26px;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-principles__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-principles__figure {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-cta {
    padding: 72px 0 86px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-tl::before,
  .page-about .about-sport,
  .page-about .about-sport__dot,
  .page-about .about-map__dots circle {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: translateY(var(--about-ty));
  }
}