.page-about {
  --ab-measure: 68ch;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ── 首屏 ───────────────────────────── */
.page-about .ab-hero {
  position: relative;
  background:
    radial-gradient(130% 96% at 86% -10%, rgba(216, 255, 62, .14), transparent 58%),
    radial-gradient(90% 70% at 4% 110%, rgba(30, 66, 114, .75), transparent 62%),
    var(--ink);
  color: var(--paper);
  padding: clamp(28px, 4vw, 48px) 0 clamp(40px, 5.5vw, 76px);
  border-bottom: 1px solid var(--track-line);
}

.page-about .ab-hero .breadcrumb {
  color: var(--muted);
  margin-bottom: clamp(20px, 3.4vw, 40px);
}

.page-about .ab-hero__head {
  max-width: 22ch;
}

.page-about .ab-hero__title {
  font-size: clamp(32px, 5.6vw, 66px);
  line-height: 1.02;
  letter-spacing: -.02em;
  margin: 12px 0 0;
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin-top: clamp(16px, 2.2vw, 26px);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--track-line);
  border: 1px solid var(--track-line);
  margin-top: clamp(30px, 4.2vw, 52px);
}

.page-about .ab-stat {
  background: var(--ink);
  padding: 16px 18px 18px;
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--lime);
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

/* ── 通用区块 ───────────────────────── */
.page-about .ab-block {
  padding: clamp(48px, 6.4vw, 96px) 0;
}

.page-about .ab-block--paper { background: var(--paper); color: var(--ink); }
.page-about .ab-block--night { background: var(--night); color: var(--paper); }
.page-about .ab-block--ink { background: var(--ink); color: var(--paper); }
.page-about .ab-block--track { background: var(--track); color: var(--paper); }

.page-about .ab-column {
  max-width: var(--ab-measure);
}

.page-about .ab-label--onDark {
  color: var(--verify);
}

.page-about .ab-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.06;
  letter-spacing: -.015em;
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-about .ab-h2--onDark { color: var(--paper); }

.page-about .ab-lead {
  margin-top: 16px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .ab-block--night .ab-lead,
.page-about .ab-block--ink .ab-lead,
.page-about .ab-block--track .ab-lead { color: var(--muted); }

.page-about .ab-prose {
  margin-top: 20px;
  max-width: var(--ab-measure);
}

.page-about .ab-prose p {
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .ab-prose p + p { margin-top: 1.05em; }

/* ── 纸张小注 ───────────────────────── */
.page-about .ab-note {
  position: relative;
  margin-top: 30px;
  padding: 18px 20px 20px;
  background: #EBEFE7;
  border: 1px solid var(--rule);
  border-left: 4px solid var(--coral);
  box-shadow: var(--paper-shadow);
}

.page-about .ab-note p {
  font-size: 14px;
  line-height: 1.76;
  color: var(--ink-soft);
}

.page-about .ab-note .index-label { margin-bottom: 8px; color: var(--coral); }

.page-about .ab-note--coral {
  background: var(--paper);
  border-left-color: var(--coral);
}

.page-about .ab-block--night .ab-note,
.page-about .ab-block--ink .ab-note,
.page-about .ab-block--track .ab-note {
  background: rgba(244, 246, 241, .06);
  border-color: rgba(244, 246, 241, .22);
  border-left-color: var(--coral);
  box-shadow: none;
}

.page-about .ab-block--night .ab-note p,
.page-about .ab-block--ink .ab-note p,
.page-about .ab-block--track .ab-note p { color: var(--muted); }

/* ── 图片 ───────────────────────────── */
.page-about .ab-wide-figure {
  margin: 0 0 clamp(30px, 4vw, 52px);
  border: 1px solid var(--track-line);
}
.page-about .ab-flow-figure {
  margin: clamp(26px, 3.6vw, 44px) 0 clamp(26px, 3.6vw, 44px);
  border: 1px solid var(--rule);
}

/* ── 团队分工纸片 ───────────────────── */
.page-about .ab-roster {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(30px, 4vw, 50px);
}

.page-about .ab-role {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule);
  box-shadow: var(--paper-shadow);
  padding: 22px 22px 24px;
}

.page-about .ab-role:nth-child(2) { border-top: 4px solid var(--whistle); }
.page-about .ab-role:nth-child(3) { border-top: 4px solid var(--verify); }
.page-about .ab-role:nth-child(1) { border-top: 4px solid var(--lime); }

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--rule);
}

.page-about .ab-role__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 23px);
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-about .ab-role__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--track);
}

.page-about .ab-role__text {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink-soft);
}

.page-about .ab-tick {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 8px;
}

.page-about .ab-tick li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.page-about .ab-tick li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--lime);
}

.page-about .ab-block--night .ab-tick li { color: var(--ink-soft); }

/* ── 三段流程 ───────────────────────── */
.page-about .ab-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: clamp(26px, 3.4vw, 42px);
}

.page-about .ab-step {
  background: var(--paper);
  padding: 22px 22px 24px;
}

.page-about .ab-step__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  padding: 4px 10px;
  background: var(--ink);
  color: var(--lime);
}

.page-about .ab-step__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  margin: 14px 0 0;
}

.page-about .ab-step p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink-soft);
}

/* ── 数据对照 ───────────────────────── */
.page-about .ab-checks {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(28px, 3.8vw, 46px);
}

.page-about .ab-check {
  position: relative;
  padding: 20px 22px 22px 66px;
  background: rgba(20, 49, 90, .38);
  border: 1px solid var(--track-line);
}

.page-about .ab-check__no {
  position: absolute;
  left: 18px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--lime);
  letter-spacing: .04em;
}

.page-about .ab-check__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .ab-check p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
}

/* ── 赛季时间轴 ─────────────────────── */
.page-about .ab-block--timeline {
  position: relative;
  padding-bottom: clamp(40px, 5vw, 64px);
}

.page-about .ab-timeline-wrap {
  position: relative;
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .ab-timeline-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: .5;
}

.page-about .ab-timeline-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: none;
}

.page-about .ab-timeline {
  position: relative;
  display: flex;
  gap: 14px;
  padding: 10px 0 24px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-timeline:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-about .ab-tl-node {
  flex: 0 0 78%;
  max-width: 300px;
  scroll-snap-align: start;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 4px solid var(--whistle);
  box-shadow: var(--paper-shadow);
  padding: 18px 18px 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-tl-node:hover {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .ab-tl-node.is-current {
  border-top-color: var(--lime);
  box-shadow: 0 0 0 2px var(--lime), var(--paper-shadow);
}

.page-about .ab-tl-season {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--coral);
}

.page-about .ab-tl-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.28;
  margin: 10px 0 0;
  color: var(--ink);
}

.page-about .ab-tl-body {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .ab-tl-meta {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  line-height: 1.6;
  color: var(--track);
}

/* ── 合作方 ─────────────────────────── */
.page-about .ab-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(244, 246, 241, .2);
  border: 1px solid rgba(244, 246, 241, .2);
  margin-top: clamp(28px, 3.8vw, 46px);
}

.page-about .ab-partner {
  background: var(--track);
  padding: 20px 22px 22px;
}

.page-about .ab-partner__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--lime);
}

.page-about .ab-partner p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
}

.page-about .ab-packs {
  margin-top: clamp(30px, 4vw, 48px);
  padding: 22px 22px 24px;
  background: rgba(5, 13, 24, .42);
  border: 1px solid rgba(244, 246, 241, .2);
}

.page-about .ab-pack-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 14px;
}

.page-about .ab-pack-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-left: 16px;
  border-left: 3px solid var(--verify);
}

.page-about .ab-pack-list strong {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-pack-list span {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .ab-stamp {
  margin-top: 22px;
  color: var(--muted);
}

/* ── 合作与加入 ─────────────────────── */
.page-about .ab-join {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(28px, 3.8vw, 46px);
}

.page-about .ab-join-card {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 24px;
  background: rgba(20, 49, 90, .4);
  border: 1px solid var(--track-line);
  transition: border-color var(--dur) var(--ease);
}

.page-about .ab-join-card:hover { border-color: var(--lime); }

.page-about .ab-join-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  color: var(--paper);
  margin-top: 12px;
}

.page-about .ab-join-card p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
  flex: 1 1 auto;
}

.page-about .ab-join-card .btn {
  align-self: flex-start;
  margin-top: 18px;
}

.page-about .ab-pathbar {
  margin-top: clamp(30px, 4vw, 48px);
  flex-wrap: wrap;
  gap: 10px 18px;
}

/* ── 响应式 ─────────────────────────── */
@media (min-width: 600px) {
  .page-about .ab-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .ab-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .ab-partners { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .ab-pack-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .ab-join { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .ab-tl-node { flex: 0 0 46%; }
}

@media (min-width: 900px) {
  .page-about .ab-roster { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
  .page-about .ab-checks { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--track-line); border: 1px solid var(--track-line); }
  .page-about .ab-check { background: var(--ink); }
  .page-about .ab-tl-node { flex: 0 0 300px; }
  .page-about .ab-partners { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1100px) {
  .page-about .ab-note {
    margin-left: -22px;
    margin-right: -70px;
    padding-left: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl-node,
  .page-about .ab-join-card { transition: none; }
  .page-about .ab-tl-node:hover { transform: none; }
}
</<PAGE_CSS>>>