.page-about {
  --about-line: rgba(31, 26, 22, 0.12);
  --about-line-dark: rgba(242, 248, 255, 0.16);
  --about-rail: 128px;
  color: var(--ink);
  background: var(--snow);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(2.4rem, 6vw, 4.6rem)) 0 clamp(2.8rem, 6vw, 4.6rem);
  background:
    radial-gradient(120% 82% at 84% 6%, rgba(123, 47, 247, 0.14), transparent 62%),
    radial-gradient(94% 72% at 4% 0%, rgba(121, 208, 232, 0.48), transparent 60%),
    linear-gradient(180deg, var(--ice) 0%, var(--snow) 82%);
  overflow: hidden;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(0.9rem, 3vw, 1.6rem);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
}

.page-about .about-hero-copy {
  display: flex;
  flex-direction: column;
  gap: clamp(0.85rem, 2vw, 1.15rem);
}

.page-about .about-hero-copy h1 {
  margin: 0;
}

.page-about .about-hero-copy .lede {
  margin: 0;
  max-width: 54ch;
}

.page-about .about-hero-side {
  display: flex;
  gap: clamp(0.9rem, 2.4vw, 1.5rem);
  align-items: stretch;
}

.page-about .annotation--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.32em;
  font-size: 0.72rem;
  line-height: 1;
  color: var(--ink-soft);
  text-transform: uppercase;
  margin: 0;
  flex: 0 0 auto;
}

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

.page-about .about-hero-stats .stat {
  background: rgba(255, 255, 255, 0.88);
  padding: clamp(0.85rem, 2.2vw, 1.25rem);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.page-about .about-hero-stats .stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-hero-stats .stat-unit {
  font-size: 0.6em;
  margin-left: 0.15em;
  letter-spacing: 0;
}

.page-about .about-hero-stats .stat-label {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

/* ---------- 区块底色 ---------- */
.page-about .about-band--cream {
  background: var(--cream);
}

.page-about .about-band--ice {
  background: linear-gradient(180deg, var(--ice-deep) 0%, var(--ice) 58%, var(--snow) 100%);
}

.page-about .about-band--ink {
  background: var(--midnight);
  color: var(--cold-white);
}

.page-about .about-band--snow {
  background: var(--snow);
}

.page-about .about-band--ink .section-title,
.page-about .about-band--ink .about-next-text {
  color: var(--cold-white);
}

.page-about .about-band--ink .lede,
.page-about .about-band--ink .about-split-main p {
  color: rgba(242, 248, 255, 0.78);
}

/* ---------- 通用分栏 ---------- */
.page-about .about-section-head {
  display: grid;
  gap: 0.8rem;
  max-width: 62ch;
}

.page-about .about-section-head > * {
  margin: 0;
}

.page-about .about-split {
  display: grid;
  gap: clamp(1.4rem, 3.6vw, 2.6rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-split-rail {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.page-about .about-rail-index {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-split-rail .annotation {
  margin: 0;
}

.page-about .about-split-main {
  display: flex;
  flex-direction: column;
  gap: clamp(0.9rem, 2vw, 1.25rem);
  min-width: 0;
}

.page-about .about-split-main > * {
  margin: 0;
}

.page-about .about-split-main p {
  max-width: 64ch;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0.4rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.page-about .img-frame {
  overflow: hidden;
}

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

.page-about .about-figcaption {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .about-band--ink .about-figcaption {
  color: rgba(242, 248, 255, 0.6);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(0.9rem, 2.4vw, 1.4rem);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), var(--violet) 55%, var(--cyan));
  opacity: 0.6;
}

.page-about .about-tl-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: clamp(0.85rem, 2.4vw, 1.5rem);
  align-items: start;
}

.page-about .about-tl-marker {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--snow);
  border: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--midnight);
  transition: transform 0.3s var(--ease), background-color 0.3s var(--ease),
    border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .about-tl-body {
  min-width: 0;
  background: var(--snow);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  padding: clamp(1rem, 2.4vw, 1.45rem);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}

.page-about .about-tl-item:hover .about-tl-marker,
.page-about .about-tl-item:focus-within .about-tl-marker {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--snow);
  transform: scale(1.08);
}

.page-about .about-tl-item:hover .about-tl-body,
.page-about .about-tl-item:focus-within .about-tl-body {
  transform: translateY(-4px);
  box-shadow: var(--shadow-raise);
  border-color: var(--line-cool);
}

.page-about .about-tl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-about .about-tl-title {
  margin: 0.65rem 0 0.5rem;
  font-size: clamp(1.02rem, 2.1vw, 1.25rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-tl-body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line-dark);
  border: 1px solid var(--about-line-dark);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metric {
  background: var(--midnight-2);
  padding: clamp(0.85rem, 2.2vw, 1.15rem);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-metric-key {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: rgba(242, 248, 255, 0.62);
}

.page-about .about-metric-val {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(0.9rem, 2.4vw, 1.3rem);
}

.page-about .about-team-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: clamp(1rem, 2.4vw, 1.4rem);
  border: 1px solid var(--about-line-dark);
  border-radius: var(--radius);
  background: rgba(242, 248, 255, 0.06);
  outline: none;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-team-card:hover {
  transform: translateY(-3px);
  border-color: rgba(121, 208, 232, 0.6);
  background: rgba(121, 208, 232, 0.1);
}

.page-about .about-team-card:focus-visible {
  border-color: var(--cyan);
  background: rgba(121, 208, 232, 0.12);
  box-shadow: 0 0 0 3px rgba(123, 47, 247, 0.65);
}

.page-about .about-team-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-team-name {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cold-white);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(242, 248, 255, 0.74);
}

.page-about .about-figure--inset {
  margin-top: clamp(0.4rem, 1.4vw, 0.9rem);
}

/* ---------- 本地看球 ---------- */
.page-about .about-local-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3.6vw, 2.6rem);
  margin-top: clamp(1.6rem, 3.6vw, 2.4rem);
}

.page-about .about-local-copy {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about .about-local-copy p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-local-aside {
  background: var(--snow);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  padding: clamp(1.1rem, 2.6vw, 1.6rem);
}

.page-about .about-local-aside-title {
  margin: 0 0 1rem;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-cool);
}

.page-about .about-local-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-local-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-local-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--orange);
  transform: rotate(45deg);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.6rem);
  margin-top: clamp(1.6rem, 3.6vw, 2.4rem);
}

.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-partner-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: clamp(0.95rem, 2.2vw, 1.25rem);
  border-radius: var(--radius);
  background: var(--ice);
  border: 1px solid var(--line-cool);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.page-about .about-partner-item:hover {
  transform: translateX(5px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-soft);
}

.page-about .about-partner-count {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
  min-width: 1.6ch;
}

.page-about .about-partner-title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-partner-item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-partner-side {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.6vw, 1.5rem);
  min-width: 0;
}

.page-about .about-report {
  background: var(--cream);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  padding: clamp(1.05rem, 2.6vw, 1.5rem);
}

.page-about .about-report-text {
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 结尾 ---------- */
.page-about .about-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3.6vw, 2.8rem);
  align-items: center;
}

.page-about .about-next-text {
  margin: 0.9rem 0 0;
  max-width: 58ch;
  line-height: 1.8;
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.page-about .about-next-link {
  flex: 1 1 100%;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-next-link:hover,
.page-about .about-next-link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-about .about-hero-side {
    flex-direction: column;
    gap: 0.9rem;
  }

  .page-about .about-hero-side .annotation--vertical {
    writing-mode: horizontal-tb;
    letter-spacing: 0.22em;
    font-size: 0.68rem;
  }
}

@media (min-width: 640px) {
  .page-about .about-team-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-about .about-local-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .about-next-link {
    flex: 0 1 auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(1.8rem, 4vw, 3rem);
  }

  .page-about .about-split-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.15rem;
    padding-top: 0.4rem;
  }

  .page-about .about-partner-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-marker,
  .page-about .about-tl-body,
  .page-about .about-team-card,
  .page-about .about-partner-item,
  .page-about .about-next-link {
    transition: none;
  }

  .page-about .about-tl-item:hover .about-tl-body,
  .page-about .about-tl-item:focus-within .about-tl-body,
  .page-about .about-tl-item:hover .about-tl-marker,
  .page-about .about-tl-item:focus-within .about-tl-marker,
  .page-about .about-team-card:hover,
  .page-about .about-partner-item:hover {
    transform: none;
  }
}