.page-about {
  --about-rail: 190px;
  --about-ink-soft: rgba(244, 241, 232, 0.78);
  --about-ink-faint: rgba(244, 241, 232, 0.62);
  background:
    radial-gradient(900px 520px at 88% -6%, rgba(56, 242, 192, 0.10), transparent 62%),
    radial-gradient(720px 420px at 2% 34%, rgba(194, 112, 78, 0.10), transparent 60%),
    linear-gradient(180deg, var(--indigo) 0%, var(--night) 56%, var(--indigo) 100%);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about .crumb {
  padding-top: 22px;
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 6px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .about-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 2px solid var(--edge);
  padding-bottom: 8px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.012em;
  font-weight: 800;
  margin: 18px 0 0;
}

.page-about .about-lead {
  margin: 18px 0 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 46ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-stats .stat {
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-sm);
  background: rgba(11, 16, 38, 0.72);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stats .stat-num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-stats .stat--cyan .stat-num {
  color: var(--cyan);
}

.page-about .about-stats .stat--amber .stat-num {
  color: var(--amber);
}

.page-about .about-stats .stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-hero-media {
  margin: 0;
}

.page-about .about-hero-media .media-caption {
  margin-top: 10px;
  color: var(--about-ink-faint);
}

/* ---------- 主体：左栏刻度 + 纵向长文 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 26px;
  padding-top: 38px;
  padding-bottom: 60px;
}

.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 0;
  border-bottom: 2px solid var(--edge);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail .chapter-link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  color: var(--muted);
  border: 2px solid transparent;
  padding: 6px 10px;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

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

.page-about .about-rail .chapter-link.is-active,
.page-about .about-rail .chapter-link[aria-current="true"] {
  color: var(--night);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-section {
  position: relative;
  padding: 30px 0 4px;
  border-top: 2px solid var(--edge);
}

.page-about .about-section + .about-section {
  margin-top: 30px;
}

.page-about .about-section--moss {
  background: linear-gradient(180deg, rgba(92, 122, 92, 0.16), rgba(92, 122, 92, 0.02));
  border-left: 2px solid var(--moss);
  padding-left: 16px;
  padding-right: 16px;
  margin-left: -16px;
  margin-right: -16px;
}

.page-about .about-section--clay {
  background: linear-gradient(180deg, rgba(194, 112, 78, 0.15), rgba(194, 112, 78, 0.02));
  border-left: 2px solid var(--clay);
  padding-left: 16px;
  padding-right: 16px;
  margin-left: -16px;
  margin-right: -16px;
}

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

.page-about .about-head .index-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--cyan);
  border-bottom: 2px solid var(--cyan);
  padding-bottom: 2px;
}

.page-about .about-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.6vw, 2.05rem);
  line-height: 1.22;
  letter-spacing: -0.008em;
  font-weight: 800;
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .about-text {
  margin: 0 0 8px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 66ch;
}

.page-about .about-text--tight {
  margin-top: 20px;
}

/* 团队分工 */
.page-about .about-roster {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .roster-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 0;
  border-bottom: 2px solid var(--edge-soft);
}

.page-about .roster-num {
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .roster-role {
  grid-row: 1;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  align-self: center;
  color: var(--paper);
}

.page-about .roster-desc {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
  max-width: 60ch;
}

/* 三步流程 */
.page-about .about-steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-step {
  display: grid;
  gap: 6px;
  padding: 18px 0 18px 18px;
  border-left: 2px solid var(--cyan);
  border-bottom: 2px solid var(--edge-soft);
}

.page-about .about-step:nth-child(2) {
  border-left-color: var(--amber);
}

.page-about .about-step:nth-child(3) {
  border-left-color: var(--clay);
}

.page-about .about-step h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  margin: 0;
  color: var(--paper);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
  max-width: 62ch;
}

.page-about .step-no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-fold {
  margin-top: 22px;
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-sm);
  background: rgba(11, 16, 38, 0.66);
}

.page-about .about-fold summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-fold summary::-webkit-details-marker {
  display: none;
}

.page-about .about-fold summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--cyan);
  flex: 0 0 auto;
}

.page-about .about-fold[open] summary::after {
  content: "–";
}

.page-about .fold-body {
  border-top: 2px solid var(--edge-soft);
  padding: 14px 16px 18px;
}

.page-about .fold-body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
  max-width: 66ch;
}

/* 赛季时间轴 */
.page-about .about-timeline-block {
  margin-top: 22px;
  padding: 18px 0 10px;
  border-top: 2px solid var(--edge);
  border-bottom: 2px solid var(--edge);
}

.page-about .about-timeline {
  position: relative;
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  padding-bottom: 12px;
  cursor: grab;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
}

.page-about .season-axis {
  position: absolute;
  top: 6px;
  left: 0;
  width: 1800px;
  height: 64px;
  pointer-events: none;
}

.page-about .season-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 1800px;
}

.page-about .season-node {
  flex: 0 0 200px;
  padding: 76px 20px 8px 0;
  scroll-snap-align: start;
  transition: transform 0.2s ease;
}

.page-about .season-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cyan);
  transition: color 0.2s ease;
}

.page-about .season-tag {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .season-note {
  margin: 10px 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--about-ink-faint);
  max-width: 21ch;
}

.page-about .season-node:hover,
.page-about .season-node:focus-within {
  transform: translateY(-3px);
}

.page-about .season-node:hover .season-name,
.page-about .season-node:focus-within .season-name {
  color: var(--amber);
}

.page-about .about-timeline-visual {
  margin: 18px 0 0;
}

.page-about .about-timeline-visual .media-caption {
  margin-top: 10px;
  color: var(--about-ink-faint);
}

/* 覆盖范围 */
.page-about .cover-bar {
  display: flex;
  gap: 2px;
  margin: 22px 0 0;
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-md);
}

.page-about .cover-seg {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  padding: 14px 12px;
}

.page-about .cover-seg--football {
  flex: 26;
  background: linear-gradient(135deg, rgba(56, 242, 192, 0.22), rgba(19, 26, 58, 0.92));
}

.page-about .cover-seg--basket {
  flex: 12;
  background: linear-gradient(135deg, rgba(242, 180, 65, 0.22), rgba(19, 26, 58, 0.92));
}

.page-about .cover-num {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .cover-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.4;
  color: var(--muted);
}

.page-about .cover-grid {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

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

.page-about .cover-item {
  border-top: 2px solid var(--clay);
  padding-top: 12px;
}

.page-about .cover-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .cover-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-cover-media {
  margin: 0;
}

.page-about .about-cover-media .media-caption {
  margin-top: 10px;
  color: var(--about-ink-faint);
}

/* 长期使用 */
.page-about .about-points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-point {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 16px 0;
  border-bottom: 2px solid var(--edge-soft);
}

.page-about .about-point:first-child {
  border-top: 2px solid var(--edge-soft);
}

.page-about .point-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-point p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--about-ink-soft);
  max-width: 64ch;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

  .page-about .cover-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 860px) {
  .page-about .roster-row {
    grid-template-columns: 76px 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 20px;
  }

  .page-about .roster-desc {
    grid-column: 3;
    margin-top: 0;
  }

  .page-about .about-step {
    grid-template-columns: 96px 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 20px;
  }

  .page-about .about-step p {
    margin-top: 0;
  }

  .page-about .about-point {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 0 22px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 34px 0 10px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 56px;
    padding-top: 62px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 88px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    overflow: visible;
    border-bottom: 0;
    border-left: 2px solid var(--edge);
    padding: 0 0 0 12px;
    max-height: calc(100vh - 130px);
  }

  .page-about .about-section {
    padding-top: 38px;
  }

  .page-about .about-section--moss,
  .page-about .about-section--clay {
    margin-left: -22px;
    margin-right: -22px;
    padding-left: 22px;
    padding-right: 22px;
  }

  .page-about .cover-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
    gap: 34px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-node,
  .page-about .season-name,
  .page-about .about-rail .chapter-link {
    transition: none;
  }

  .page-about .season-node:hover,
  .page-about .season-node:focus-within {
    transform: none;
  }
}