.page-about {
  --ab-warm-soft: rgba(240, 195, 78, 0.10);
  --ab-cool-soft: rgba(79, 147, 222, 0.10);
  --ab-ink-soft: rgba(230, 241, 233, 0.84);
}

/* ---------- 数字与注释层级 ---------- */
.page-about .ab-num {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--text);
}

.page-about .ab-num--m {
  font-size: 26px;
}

.page-about .ab-num--l {
  font-size: 48px;
}

.page-about .ab-idx {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding-top: 6px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: 26px 0 0;
  background:
    radial-gradient(120% 76% at 104% -6%, rgba(31, 75, 57, 0.62) 0%, rgba(7, 19, 15, 0) 62%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-crumb {
  margin-bottom: 30px;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .ab-eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .ab-h1 {
  margin: 0 0 18px;
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(42px, 12vw, 88px);
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: var(--text);
}

.page-about .ab-lede {
  margin: 0;
  color: var(--ab-ink-soft);
}

.page-about .ab-hero__side {
  border-left: 1px solid var(--line);
  padding-left: 16px;
}

.page-about .ab-hero__side .ob-anno--vertical {
  writing-mode: horizontal-tb;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .ab-hero__side-note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-about .ab-stats__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 0 18px;
  border-top: 1px solid var(--line);
}

.page-about .ab-stats__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 章节头 ---------- */
.page-about .ab-head {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  margin-bottom: 28px;
}

.page-about .ab-h2 {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(24px, 6.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text);
}

.page-about .ab-head__sub {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-section {
  padding-top: 48px;
}

/* ---------- 01 沿革刻度 ---------- */
.page-about .ab-records {
  padding-bottom: 12px;
}

.page-about .ab-records__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .ab-records__figure {
  margin: 0;
}

.page-about .ab-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 52px;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--edge) 0%, var(--line) 55%, rgba(31, 75, 57, 0) 100%);
}

.page-about .ab-tl__item {
  position: relative;
  padding-bottom: 30px;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -44px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--edge);
  background: var(--ink);
  transition: background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.page-about .ab-tl__item:hover::before,
.page-about .ab-tl__item:target::before {
  background: var(--yellow);
  border-color: var(--yellow);
  box-shadow: 0 0 0 4px rgba(240, 195, 78, 0.14);
}

.page-about .ab-tl__item:target {
  background: linear-gradient(90deg, rgba(240, 195, 78, 0.09) 0%, rgba(240, 195, 78, 0) 76%);
}

.page-about .ab-tl__num {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.01em;
  color: var(--yellow);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .ab-tl__num:hover {
  border-bottom-color: currentColor;
}

.page-about .ab-tl__title {
  margin: 8px 0 8px;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .ab-tl__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

/* ---------- 02 整宽横条：两段时间 ---------- */
.page-about .ab-band {
  margin-top: 48px;
  padding: 42px 0 46px;
  background: linear-gradient(180deg, rgba(14, 42, 32, 0.96) 0%, rgba(7, 19, 15, 1) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-align {
  display: block;
  width: 100%;
  height: auto;
  margin: 2px 0 34px;
}

.page-about .ab-align__grid line {
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 3 7;
  opacity: 0.8;
}

.page-about .ab-align__axis {
  stroke-width: 2;
}

.page-about .ab-align__axis--extra {
  stroke: var(--red);
}

.page-about .ab-align__axis--play {
  stroke: var(--edge);
}

.page-about .ab-align__dot--extra {
  fill: var(--red);
}

.page-about .ab-align__dot--play {
  fill: var(--edge);
}

.page-about .ab-align__label {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  fill: var(--muted);
}

.page-about .ab-method {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-method__figure {
  margin: 0;
}

.page-about .ab-method__item {
  padding: 0 0 0 16px;
  margin-bottom: 22px;
  border-left: 2px solid var(--line);
}

.page-about .ab-method__item--extra {
  border-left-color: var(--red);
}

.page-about .ab-method__item--play {
  border-left-color: var(--edge);
}

.page-about .ab-method__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .ab-method__item p {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

.page-about .ab-method__note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 03 口径对比 ---------- */
.page-about .ab-caliber {
  padding-bottom: 12px;
}

.page-about .ab-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .ab-split__col {
  padding: 24px 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
}

.page-about .ab-split__col--league {
  border-top: 2px solid var(--yellow);
  background: linear-gradient(180deg, var(--ab-warm-soft) 0%, var(--panel) 62%);
}

.page-about .ab-split__col--cup {
  border-top: 2px solid var(--blue);
  background: linear-gradient(180deg, var(--ab-cool-soft) 0%, var(--panel) 62%);
}

.page-about .ab-split__kicker {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-about .ab-split__col--league .ab-split__kicker {
  color: var(--yellow);
}

.page-about .ab-split__col--cup .ab-split__kicker {
  color: var(--blue);
}

.page-about .ab-split__unit {
  margin: 10px 0 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .ab-caliber__foot {
  margin-top: 26px;
  color: var(--ab-ink-soft);
}

/* ---------- 列表 ---------- */
.page-about .ab-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 9px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ab-ink-soft);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--edge);
}

.page-about .ab-list--tight li {
  margin-bottom: 6px;
}

/* ---------- 04 数据组 ---------- */
.page-about .ab-team {
  padding-bottom: 12px;
}

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-team__figure {
  margin: 0;
}

.page-about .ab-roles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-roles li {
  position: relative;
  padding: 16px 0 16px 52px;
  border-top: 1px solid var(--line);
}

.page-about .ab-roles li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .ab-roles__idx {
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .ab-roles__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .ab-roles p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ab-ink-soft);
}

.page-about .ab-team__foot {
  margin-top: 26px;
  color: var(--ab-ink-soft);
}

/* ---------- 05 收录与节奏 ---------- */
.page-about .ab-scope {
  padding-bottom: 12px;
}

.page-about .ab-ledger {
  margin: 0;
}

.page-about .ab-ledger__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 16px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-ledger__row:first-child {
  border-top: 1px solid var(--line);
}

.page-about .ab-ledger dt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .ab-ledger dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-align: right;
}

.page-about .ab-ledger__unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .ab-scope__foot {
  margin-top: 24px;
  color: var(--ab-ink-soft);
}

/* ---------- 06 边界声明 ---------- */
.page-about .ab-statement {
  margin-top: 48px;
  padding: 42px 0 52px;
  background: linear-gradient(180deg, rgba(14, 42, 32, 0.9) 0%, rgba(7, 19, 15, 1) 100%);
  border-top: 1px solid var(--line);
}

.page-about .ab-statement__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .ab-statement__text {
  color: var(--ab-ink-soft);
}

.page-about .ab-statement__links {
  margin: 34px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-statement__links a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--edge);
}

.page-about .ab-statement__links a:hover {
  border-bottom-color: var(--yellow);
}

/* ---------- 通用链接与图片 ---------- */
.page-about a {
  color: var(--text);
}

.page-about .ob-prose a {
  text-decoration: none;
  border-bottom: 1px solid var(--edge);
}

.page-about .ob-prose a:hover {
  border-bottom-color: var(--yellow);
}

.page-about .ob-figure__media img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero {
    padding-top: 34px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 170px;
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-hero__side .ob-anno--vertical {
    writing-mode: vertical-rl;
    letter-spacing: 0.2em;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: 40px;
  }

  .page-about .ab-head {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 16px;
    margin-bottom: 34px;
  }

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

  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 20px;
  }

  .page-about .ab-statement__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 34px;
    align-items: start;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .ab-hero {
    padding-top: 42px;
  }

  .page-about .ab-records__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-tl {
    padding-left: 64px;
  }

  .page-about .ab-tl::before {
    left: 17px;
  }

  .page-about .ab-tl__item::before {
    left: -53px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-records,
  .page-about .ab-caliber,
  .page-about .ab-team,
  .page-about .ab-scope {
    padding-top: 60px;
  }

  .page-about .ab-band,
  .page-about .ab-statement {
    margin-top: 60px;
    padding-top: 54px;
    padding-bottom: 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl__item::before {
    transition: none;
  }
}
<<<END>>>