.page-about {
  --about-rail-w: 230px;
  --about-flow: clamp(56px, 8vw, 104px);
  --about-ring: rgba(242, 196, 85, .5);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 32px);
  padding-bottom: clamp(34px, 5.5vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(880px 400px at 10% -12%, rgba(242, 196, 85, .10), transparent 62%),
    radial-gradient(680px 360px at 92% -4%, rgba(18, 229, 160, .07), transparent 60%);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
}

.page-about .about-hero__lead h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -.022em;
  color: var(--text);
}

.page-about .about-hero__desc {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}

.page-about .about-fact {
  padding: 16px 18px 18px;
  background: rgba(14, 34, 64, .72);
  backdrop-filter: blur(6px);
}

.page-about .about-fact dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.page-about .about-fact dd {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--text-dim);
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}

.page-about .about-fact .stat-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 30px);
  line-height: 1;
}

.page-about .stat-num--gold { color: var(--gold); }
.page-about .stat-num--green { color: var(--green); }
.page-about .stat-num--orange { color: var(--orange); }

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }
}

/* ---------- 主布局：左窄栏 + 右宽内容 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
  padding-top: clamp(36px, 5.5vw, 68px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 84px);
  }
}

/* ---------- 左侧栏 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__sticky {
  position: static;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.page-about .about-rail .toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail .toc-link {
  display: block;
  padding: 7px 0 7px 14px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-mute);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, padding-left .2s ease;
}

.page-about .about-rail .toc-link:hover,
.page-about .about-rail .toc-link:focus-visible {
  color: var(--text);
  border-color: var(--line-strong);
}

.page-about .about-rail .toc-link[aria-current="location"] {
  color: var(--gold);
  border-color: var(--gold);
  padding-left: 19px;
}

.page-about .about-rail__note {
  margin-top: 26px;
  padding: 14px 16px 15px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--glass);
}

.page-about .about-rail__note-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-rail__note p:last-child {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--text-dim);
}

@media (min-width: 1024px) {
  .page-about .about-rail__sticky {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    max-height: calc(100vh - var(--header-h) - 52px);
    overflow-y: auto;
  }
}

/* ---------- 内容列 ---------- */
.page-about .about-body {
  display: flex;
  flex-direction: column;
  gap: var(--about-flow);
  min-width: 0;
}

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

.page-about .about-section__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 30px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -.018em;
  color: var(--text);
}

.page-about .prose {
  max-width: 68ch;
}

.page-about .prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

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

.page-about .prose-lead {
  font-size: clamp(17px, 2.1vw, 20px) !important;
  line-height: 1.72 !important;
  color: var(--text) !important;
}

.page-about .about-pullquote {
  margin: clamp(24px, 3.6vw, 38px) 0;
  padding: 4px 0 4px clamp(16px, 3vw, 28px);
  border-left: 3px solid var(--gold);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.7vw, 27px);
  line-height: 1.36;
  letter-spacing: -.012em;
  color: var(--text);
}

/* ---------- 赛事指标 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0 0 clamp(26px, 4vw, 42px);
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px 22px;
  background: rgba(14, 34, 64, .7);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1;
  color: var(--text);
}

.page-about .about-metric__unit {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.page-about .about-metric__desc {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

@media (min-width: 680px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: flex;
  gap: 14px;
  margin: 0 0 clamp(26px, 4vw, 42px);
  padding: 6px 2px 18px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--line-strong) transparent;
}

.page-about .about-timeline__item {
  position: relative;
  flex: 0 0 min(76vw, 244px);
  scroll-snap-align: start;
  padding: 20px 16px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--glass-2), var(--glass));
  transition: border-color .22s ease, transform .22s ease, background .22s ease;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: -1px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(242, 196, 85, 0));
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within,
.page-about .about-timeline__item:focus-visible {
  border-color: var(--about-ring);
  transform: translateY(-3px);
  background: linear-gradient(158deg, rgba(242, 196, 85, .10), var(--glass));
  outline: none;
}

.page-about .about-timeline__ver {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-timeline__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.28;
  color: var(--text);
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--text-dim);
}

/* ---------- 媒体容器补充 ---------- */
.page-about .media-frame {
  margin: clamp(28px, 4vw, 46px) 0 0;
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-frame__caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-about .about-partner-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 34, 64, .66);
}

.page-about .about-partner-card__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.page-about .about-partner-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(34px, 5vw, 48px);
  line-height: 1;
}

.page-about .about-partner-card__desc {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--text-dim);
}

@media (min-width: 720px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

.page-about .about-honors li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(8, 21, 42, .62);
}

.page-about .about-honors__mark {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 196, 85, .14);
}

.page-about .about-honors p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--text-dim);
}

/* ---------- 尾部引导 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(700px 300px at 78% 120%, rgba(18, 229, 160, .09), transparent 62%),
    rgba(4, 11, 22, .5);
}

.page-about .about-next__inner {
  display: grid;
  gap: clamp(24px, 3.4vw, 36px);
  padding-top: clamp(38px, 5.5vw, 64px);
  padding-bottom: clamp(38px, 5.5vw, 64px);
}

.page-about .about-next__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -.018em;
  color: var(--text);
}

.page-about .about-next__desc {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__links .btn {
  text-decoration: none;
}

@media (min-width: 900px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
  .page-about .about-next__links {
    justify-content: flex-end;
  }
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-about .about-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-timeline__item {
    flex: 0 0 82vw;
  }
  .page-about .about-metric,
  .page-about .about-partner-card {
    padding-left: 15px;
    padding-right: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-rail .toc-link {
    transition: none;
  }
  .page-about .about-timeline__item:hover,
  .page-about .about-timeline__item:focus-within {
    transform: none;
  }
}