.page-about {
  --about-rail: 224px;
}

/* 面包屑与首屏 */
.page-about .about-top {
  padding-bottom: 0;
}

.page-about .about-top > .breadcrumb {
  margin-top: 20px;
  font-size: 12px;
}

.page-about .about-hero {
  margin-top: clamp(20px, 4vw, 34px);
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* 首屏数据条 */
.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stats li {
  background: var(--panel);
  padding: 16px 16px 18px;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.05;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .stat-unit {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--mist);
  letter-spacing: 0;
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* 首屏横幅 */
.page-about .about-banner {
  margin: clamp(28px, 5vw, 48px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
  aspect-ratio: 4 / 3;
}

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

/* 正文两栏骨架 */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: clamp(40px, 7vw, 76px);
  padding-bottom: clamp(56px, 9vw, 96px);
}

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

/* 章节索引轨道 */
.page-about .about-rail {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: 12px;
}

.page-about .rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .rail-item {
  flex: 0 0 auto;
}

.page-about .rail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--mist);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

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

.page-about .rail-num {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--line-strong);
  transition: color var(--dur-fast) var(--ease);
}

/* 章节索引跟随定位 */
.page-about .about-body:has(#about-origin:target) .rail-link[href="#about-origin"],
.page-about .about-body:has(#about-columns:target) .rail-link[href="#about-columns"],
.page-about .about-body:has(#about-team:target) .rail-link[href="#about-team"],
.page-about .about-body:has(#about-cadence:target) .rail-link[href="#about-cadence"],
.page-about .about-body:has(#about-history:target) .rail-link[href="#about-history"],
.page-about .about-body:has(#about-owner:target) .rail-link[href="#about-owner"] {
  color: var(--paper);
  border-color: var(--signal);
}

.page-about .about-body:has(#about-origin:target) .rail-link[href="#about-origin"] .rail-num,
.page-about .about-body:has(#about-columns:target) .rail-link[href="#about-columns"] .rail-num,
.page-about .about-body:has(#about-team:target) .rail-link[href="#about-team"] .rail-num,
.page-about .about-body:has(#about-cadence:target) .rail-link[href="#about-cadence"] .rail-num,
.page-about .about-body:has(#about-history:target) .rail-link[href="#about-history"] .rail-num,
.page-about .about-body:has(#about-owner:target) .rail-link[href="#about-owner"] .rail-num {
  color: var(--signal);
}

/* 章节 */
.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 72px);
}

.page-about .about-section + .about-section {
  margin-top: clamp(44px, 6vw, 68px);
  padding-top: clamp(32px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-about .about-section .section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .about-section .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

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

.page-about .prose p {
  margin: 0 0 0.9em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .prose + .cadence-list,
.page-about .cadence-list + .prose {
  margin-top: 20px;
}

/* 栏目清单 */
.page-about .columns-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 22px;
}

.page-about .column-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .column-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 12px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .column-idx {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--line-strong);
}

.page-about .column-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

a.column-link:hover,
a.column-link:focus-visible {
  color: var(--signal);
}

.page-about .column-desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .column-item--current .column-link {
  color: var(--mint);
}

.page-about .columns-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .columns-figure .fig-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* 联赛条带 */
.page-about .league-map {
  margin-top: 28px;
}

.page-about .league-intro {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .league-bar {
  display: flex;
  gap: 3px;
  height: 12px;
  margin-bottom: 16px;
}

.page-about .league-seg {
  border-radius: 1px;
}

.page-about .league-seg:nth-child(1) { flex: 4 1 0; }
.page-about .league-seg:nth-child(2) { flex: 5 1 0; }
.page-about .league-seg:nth-child(3) { flex: 3 1 0; }
.page-about .league-seg:nth-child(4) { flex: 2 1 0; }

.page-about .league-seg--fbl { background: var(--lg-football); }
.page-about .league-seg--bkt { background: var(--lg-basket); }
.page-about .league-seg--cup { background: var(--lg-cup); }

.page-about .league-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 16px;
}

.page-about .legend-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--mist);
}

.page-about .legend-code {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--paper);
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-radius: 1px;
}

.page-about .legend-name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .legend-count {
  font-size: 14px;
  color: var(--paper);
}

/* 团队分工 */
.page-about .about-crew {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .crew-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .crew-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .crew-duty,
.page-about .crew-output {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .crew-output {
  font-size: 12.5px;
  letter-spacing: 0.01em;
  color: var(--mint);
}

.page-about .crew-tag {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--mist);
  opacity: 0.72;
}

/* 刷新节奏 */
.page-about .cadence-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .cadence-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .cadence-time {
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--signal);
}

.page-about .cadence-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* 时间轴 */
.page-about .about-history-fig {
  margin: 0 0 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
}

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

.page-about .about-history-fig .fig-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--signal) 0%, var(--line-strong) 58%, var(--line) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 8px;
  height: 8px;
  box-sizing: border-box;
  border: 1px solid var(--signal);
  border-radius: 50%;
  background: var(--ink);
}

.page-about .tl-item--current::before {
  background: var(--signal);
  border-color: var(--signal);
}

.page-about .tl-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  margin-bottom: 4px;
}

.page-about .tl-stage {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-about .tl-item--current .tl-stage {
  color: var(--mint);
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
  padding: 1px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 1px;
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl-text {
  margin: 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .tl-more {
  margin: 6px 0 0;
  max-width: 60ch;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--mint);
  opacity: 0.82;
}

/* 归属与联系 */
.page-about .about-owner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 22px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .owner-cell {
  background: var(--panel);
  padding: 20px;
}

.page-about .owner-cell h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .owner-cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .owner-cell a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 底部行动区 */
.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 64px);
  padding: clamp(24px, 4vw, 36px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-deep) 100%);
}

.page-about .about-cta-text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.8vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-banner {
    aspect-ratio: 16 / 7;
  }

  .page-about .league-legend {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 16px;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

@media (min-width: 780px) {
  .page-about .columns-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .crew-row {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr) minmax(0, 1.1fr);
    gap: 20px;
    align-items: start;
    padding: 18px 0;
  }

  .page-about .crew-tag {
    display: block;
    margin: 0 0 4px;
  }

  .page-about .cadence-item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    border-top: 0;
    border-bottom: 0;
    padding-block: 0;
  }

  .page-about .rail-title {
    margin-bottom: 12px;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-top: 1px solid var(--line);
  }

  .page-about .rail-item {
    border-bottom: 1px solid var(--line);
  }

  .page-about .rail-link {
    display: flex;
    align-items: baseline;
    padding: 12px 0 12px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    line-height: 1.4;
  }

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

/* 悬停展开时间轴细节 */
@media (hover: hover) and (pointer: fine) and (min-width: 900px) {
  .page-about .tl-more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur-mid) var(--ease), opacity var(--dur-mid) var(--ease);
  }

  .page-about .tl-item:hover .tl-more,
  .page-about .tl-item:focus-within .tl-more {
    max-height: 120px;
    opacity: 0.9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-link,
  .page-about .rail-num,
  .page-about .column-link,
  .page-about .tl-more {
    transition: none;
  }
}
<<<END>>>