/* ===== 品牌自述页（作用域 .page-about） ===== */
.page-about {
  --about-line: rgba(20, 32, 46, .13);
  --about-light-line: rgba(255, 247, 236, .22);
  background: var(--c-cream);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
}

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

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.22;
  margin: 0;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-offset) + 18px);
}

.page-about .breadcrumb {
  padding-top: 14px;
  font-size: var(--fs-sm);
}

.page-about .section {
  padding: clamp(46px, 7vw, 84px) 0;
}

.page-about .about-sec-head {
  max-width: 680px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-sec-head .lede {
  color: var(--c-ink-soft);
  max-width: 62ch;
  margin-top: 14px;
}

.page-about .h-section {
  font-size: var(--fs-h2);
  margin-top: 10px;
}

.page-about .h-sub {
  font-size: var(--fs-h3);
  margin: 0 0 8px;
}

.page-about p {
  margin: 0 0 14px;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 32px) 0 clamp(40px, 6vw, 72px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -14%;
  top: -20%;
  width: 46vw;
  height: 46vw;
  max-width: 620px;
  max-height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255, 201, 60, .45), rgba(242, 101, 34, .16) 48%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 54px);
  align-items: center;
}

.page-about .about-hero-copy h1 {
  font-size: var(--fs-display);
  margin: 10px 0 18px;
  max-width: 16ch;
}

.page-about .about-hero-copy .lede {
  max-width: 58ch;
  color: var(--c-ink-soft);
}

.page-about .about-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 4vw, 42px);
  margin: 26px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 4.4vw, 2.15rem);
  line-height: 1.05;
  color: var(--c-orange);
}

.page-about .stat-unit {
  font-size: .55em;
  margin-left: 2px;
}

.page-about .stat-label {
  display: block;
  font-size: var(--fs-xs);
  color: var(--c-ink-soft);
  margin-top: 6px;
  letter-spacing: .03em;
}

.page-about .about-hero-note {
  margin-top: 20px;
  font-size: var(--fs-sm);
  color: var(--c-ink-soft);
}

/* 赛程环视觉 */
.page-about .about-visual {
  display: grid;
  gap: 20px;
  justify-items: center;
}

.page-about .orbit {
  position: relative;
  width: min(100%, 340px);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #1B4E8E, var(--c-blue) 62%);
  box-shadow: var(--shadow-float-lg);
}

.page-about .orbit-ring {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.page-about .orbit-ring--outer {
  inset: 9%;
  border: 1.5px dashed rgba(255, 247, 236, .45);
  animation: about-spin 28s linear infinite;
}

.page-about .orbit-ring--inner {
  inset: 24%;
  border: 1px solid rgba(31, 157, 85, .7);
}

.page-about .orbit-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255, 247, 236, .18);
}

.page-about .orbit-dot--orange {
  top: 12%;
  left: 24%;
  background: var(--c-orange);
}

.page-about .orbit-dot--green {
  bottom: 16%;
  right: 18%;
  background: var(--c-green);
}

.page-about .orbit-core {
  text-align: center;
  color: var(--c-cream);
  padding: 0 18px;
}

.page-about .orbit-year {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 9vw, 3.2rem);
  line-height: 1;
  color: var(--c-yellow);
}

.page-about .orbit-caption {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-xs);
  letter-spacing: .14em;
  font-family: var(--font-serif);
}

.page-about .about-visual-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: var(--fs-xs);
  color: var(--c-ink-soft);
  text-align: left;
  width: 100%;
  max-width: 340px;
}

@keyframes about-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .orbit-ring--outer { animation: none; }
}

/* ---------- 起点 ---------- */
.page-about .about-start {
  padding-top: clamp(34px, 5vw, 58px);
}

.page-about .about-start .h-section {
  margin-bottom: 18px;
}

/* ---------- 深色数据带 ---------- */
.page-about .about-band {
  color: var(--c-cream);
}

.page-about .about-band .eyebrow {
  color: var(--c-yellow);
}

.page-about .about-band .h-section {
  color: var(--c-cream);
  max-width: 20ch;
}

.page-about .about-band-copy p {
  color: rgba(255, 247, 236, .82);
  max-width: 52ch;
  margin-top: 14px;
}

.page-about .about-band-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-band-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .about-band-stats .stat {
  padding: 18px 18px 16px;
  border-radius: var(--r-soft);
  background: rgba(255, 247, 236, .08);
  border-left: 3px solid var(--c-yellow);
}

.page-about .about-band-stats .stat-num {
  color: var(--c-yellow);
}

.page-about .about-band-stats .stat-label {
  color: rgba(255, 247, 236, .78);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 24px;
}

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

.page-about .tl-index a {
  display: inline-block;
  padding: 5px 13px;
  border-radius: var(--r-capsule);
  border: 1px solid var(--about-line);
  font-family: var(--font-serif);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-sm);
  color: var(--c-ink-soft);
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .tl-index a:hover,
.page-about .tl-index a:focus-visible {
  color: var(--c-orange-deep);
  border-color: var(--c-orange);
  background: rgba(242, 101, 34, .1);
}

.page-about .tl-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .tl-track::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-orange), var(--c-green) 52%, var(--c-azure));
  opacity: .55;
}

.page-about .tl-node {
  position: relative;
  padding-left: 42px;
}

.page-about .tl-marker {
  position: absolute;
  left: 0;
  top: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--c-paper);
  border: 3px solid var(--c-orange);
  box-shadow: 0 0 0 4px rgba(242, 101, 34, .14);
}

.page-about .tl-node--3 .tl-marker,
.page-about .tl-node--5 .tl-marker {
  border-color: var(--c-azure);
  box-shadow: 0 0 0 4px rgba(30, 111, 217, .14);
}

.page-about .tl-node--4 .tl-marker,
.page-about .tl-node--6 .tl-marker {
  border-color: var(--c-green);
  box-shadow: 0 0 0 4px rgba(31, 157, 85, .16);
}

.page-about .tl-year {
  font-family: var(--font-serif);
  font-size: var(--fs-h4);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-orange-deep);
  margin: 0 0 4px;
  letter-spacing: .02em;
}

.page-about .tl-body p {
  color: var(--c-ink-soft);
  max-width: 64ch;
}

/* ---------- 团队与三审 ---------- */
.page-about .about-team-main > p {
  color: var(--c-ink-soft);
  max-width: 60ch;
}

.page-about .team-bars {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .team-bar {
  display: grid;
  gap: 7px;
}

.page-about .team-bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--fs-sm);
  font-weight: 500;
}

.page-about .team-bar-head span:last-child {
  font-variant-numeric: tabular-nums;
  color: var(--c-ink-soft);
}

.page-about .team-bar-track {
  display: block;
  height: 14px;
  border-radius: var(--r-capsule);
  background: rgba(20, 32, 46, .08);
  overflow: hidden;
}

.page-about .team-bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--r-capsule);
  transition: transform var(--ease);
  transform-origin: left center;
}

.page-about .team-bar:hover .team-bar-fill {
  transform: scaleX(1.03);
}

.page-about .bar-1 .team-bar-fill { width: 39%; background: var(--c-orange); }
.page-about .bar-2 .team-bar-fill { width: 31%; background: var(--c-azure); }
.page-about .bar-3 .team-bar-fill { width: 22%; background: var(--c-green); }
.page-about .bar-4 .team-bar-fill { width: 8%; min-width: 32px; background: var(--c-indigo); }

.page-about .about-team-sub {
  margin-top: 34px;
}

.page-about .review-steps {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .review-steps li {
  position: relative;
  padding: 16px 18px 16px 20px;
  background: var(--c-paper);
  border-radius: var(--r-soft);
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--c-orange);
}

.page-about .review-steps li:nth-child(2) { border-left-color: var(--c-azure); }
.page-about .review-steps li:nth-child(3) { border-left-color: var(--c-green); }

.page-about .review-no {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--fs-xs);
  letter-spacing: .18em;
  color: var(--c-ink-soft);
  margin-bottom: 4px;
}

.page-about .review-steps strong {
  display: block;
  font-size: var(--fs-h4);
  margin-bottom: 4px;
}

.page-about .review-steps p {
  color: var(--c-ink-soft);
  font-size: var(--fs-sm);
}

.page-about .about-team-figure .media {
  border-radius: var(--r-card);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

.page-about .media-caption {
  margin-top: 12px;
  font-size: var(--fs-xs);
  color: var(--c-ink-soft);
  line-height: 1.6;
}

/* ---------- 覆盖版图 ---------- */
.page-about .coverage-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
}

.page-about .map-panel {
  background: var(--c-paper);
  border-radius: var(--r-card);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow-card);
}

.page-about .map-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.page-about .map-cell {
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  background: rgba(20, 32, 46, .1);
}

.page-about .map-cell--warm {
  background: rgba(30, 111, 217, .32);
}

.page-about .map-cell--hot {
  background: var(--c-orange);
}

.page-about .coverage-legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: var(--fs-xs);
  color: var(--c-ink-soft);
}

.page-about .coverage-notes p {
  color: var(--c-ink-soft);
}

.page-about .coverage-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
}

.page-about .coverage-facts li {
  padding: 16px;
  border-radius: var(--r-soft);
  background: var(--c-mist);
  text-align: left;
}

.page-about .coverage-facts strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  color: var(--c-blue);
}

.page-about .coverage-facts span {
  display: block;
  margin-top: 4px;
  font-size: var(--fs-xs);
  color: var(--c-ink-soft);
}

.page-about .coverage-note {
  margin-top: 22px;
}

/* ---------- 冰雪专题 ---------- */
.page-about .about-ice {
  color: var(--c-cream);
}

.page-about .about-sec-head--light .eyebrow {
  color: var(--c-yellow);
}

.page-about .about-sec-head--light .h-section {
  color: var(--c-cream);
}

.page-about .about-sec-head--light .lede {
  color: rgba(255, 247, 236, .84);
}

.page-about .about-ice-media {
  border-radius: var(--r-card);
  overflow: hidden;
  margin: 0;
  box-shadow: var(--shadow-float-lg);
}

.page-about .media-caption--light {
  color: rgba(255, 247, 236, .72);
}

.page-about .ice-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 18px;
}

.page-about .ice-stats .stat {
  padding: 20px 18px;
  border-radius: var(--r-soft);
  border: 1px solid var(--about-light-line);
  background: rgba(255, 247, 236, .06);
}

.page-about .ice-stats .stat-num {
  color: var(--c-yellow);
}

.page-about .ice-stats .stat-label {
  color: rgba(255, 247, 236, .8);
}

.page-about .ice-note {
  margin-top: 24px;
  max-width: 62ch;
  color: rgba(255, 247, 236, .84);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-tabs {
  display: grid;
  gap: 20px;
}

.page-about .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tab {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  padding: 9px 18px;
  border-radius: var(--r-capsule);
  border: 1px solid var(--about-line);
  background: var(--c-paper);
  color: var(--c-ink-soft);
  cursor: pointer;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .tab:hover {
  border-color: var(--c-orange);
  color: var(--c-orange-deep);
}

.page-about .tab[aria-selected="true"] {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: #fff;
  font-weight: 600;
}

.page-about .tabpanel {
  background: var(--c-paper);
  border-radius: var(--r-card);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-card);
  border-top: 4px solid var(--c-orange);
}

.page-about .tabpanel + .tabpanel {
  margin-top: 16px;
}

.page-about .tabpanel:nth-of-type(3) { border-top-color: var(--c-azure); }
.page-about .tabpanel:nth-of-type(4) { border-top-color: var(--c-green); }
.page-about .tabpanel:nth-of-type(5) { border-top-color: var(--c-indigo); }

.page-about .tabpanel p {
  color: var(--c-ink-soft);
  max-width: 66ch;
}

.page-about .tag-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .chip {
  display: inline-block;
  padding: 5px 13px;
  border-radius: var(--r-capsule);
  background: var(--c-mist);
  color: var(--c-blue);
  font-size: var(--fs-xs);
  white-space: nowrap;
}

.page-about .partner-build {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(30px, 5vw, 52px);
  padding-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--about-line);
}

.page-about .partner-build-copy p {
  color: var(--c-ink-soft);
  max-width: 58ch;
}

.page-about .partner-build-copy .btn {
  margin-top: 12px;
}

.page-about .partner-build-figure .media {
  border-radius: var(--r-card);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

/* ---------- 收束 CTA ---------- */
.page-about .about-cta {
  color: var(--c-cream);
}

.page-about .about-cta .eyebrow {
  color: var(--c-yellow);
}

.page-about .about-cta .h-section {
  color: var(--c-cream);
  max-width: 24ch;
}

.page-about .about-cta-copy p {
  color: rgba(255, 247, 236, .84);
  max-width: 54ch;
  margin-top: 14px;
}

.page-about .about-cta-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

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

.page-about .about-cta-links li {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border-radius: var(--r-soft);
  border: 1px solid var(--about-light-line);
  background: rgba(255, 247, 236, .06);
}

.page-about .about-cta-links span {
  font-size: var(--fs-xs);
  color: rgba(255, 247, 236, .74);
}

.page-about .btn {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .partner-build {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .page-about .about-band-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  }

  .page-about .about-timeline {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-about .tl-index {
    position: sticky;
    top: calc(var(--header-offset) + 20px);
  }

  .page-about .tl-index ol {
    display: grid;
    gap: 6px;
  }

  .page-about .tl-index a {
    display: block;
    border-color: transparent;
    border-left: 2px solid var(--about-line);
    border-radius: 0 var(--r-capsule) var(--r-capsule) 0;
    padding: 6px 14px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .85fr);
    gap: clamp(30px, 4vw, 52px);
    align-items: start;
  }

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

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

@media (max-width: 420px) {
  .page-about .map-grid {
    gap: 4px;
  }

  .page-about .about-stats {
    gap: 18px 26px;
  }
}