.page-about {
  --ab-cut: 20px;
  --ab-cut-sm: 12px;
  --ab-line: rgba(201, 162, 74, 0.28);
  --ab-line-soft: rgba(169, 180, 171, 0.16);
  --ab-line-ink: rgba(10, 10, 11, 0.14);
  --ab-ink-soft: rgba(10, 10, 11, 0.68);
  display: block;
  overflow-x: hidden;
}

.page-about .ab-head {
  max-width: 46rem;
  margin-bottom: clamp(24px, 3.6vw, 44px);
}

.page-about .ab-head .display-lg {
  margin: 8px 0 12px;
}

.page-about .section--light {
  color: var(--c-ink);
}

.page-about .section--light .lede {
  color: rgba(10, 10, 11, 0.68);
}

.page-about .ab-note {
  margin-top: 20px;
  max-width: 46rem;
  padding-left: 14px;
  border-left: 2px solid var(--c-amber);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ab-ink-soft);
}

/* ---------- 档案开头 ---------- */
.page-about .ab-open {
  overflow: hidden;
}

.page-about .ab-open__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-open__text h1 {
  margin: 10px 0 18px;
}

.page-about .ab-open__text p {
  margin-top: 1em;
}

.page-about .ab-open__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3vw, 34px);
  border: 1px solid var(--ab-line);
  background: var(--ab-line);
}

.page-about .ab-open__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: clamp(12px, 1.6vw, 18px);
  background: var(--c-felt);
}

.page-about .ab-open__stats .stat__value {
  font-family: var(--font-data);
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.05;
  color: var(--c-cream);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-about .ab-open__stats .stat__label {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--c-stone);
}

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

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

@media (min-width: 720px) {
  .page-about .ab-open__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .ab-open__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .ab-open__figure {
    margin-right: calc(var(--gutter) * -1.2);
  }
}

/* ---------- 两条主线 ---------- */
.page-about .ab-method__grid {
  align-items: stretch;
}

.page-about .ab-method__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 32px);
}

.page-about .ab-method__card .display-md {
  margin: 0;
}

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

.page-about .ab-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ab-ink-soft);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--c-gold);
  transform: skewX(-32deg);
}

/* ---------- 残局关卡库 ---------- */
.page-about .ab-levels {
  overflow: hidden;
}

.page-about .ab-levels__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

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

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

.page-about .ab-levels__body .eyebrow {
  margin-bottom: 6px;
}

.page-about .ab-levels__body .display-lg {
  margin: 0 0 14px;
}

.page-about .ab-levels__body > p {
  max-width: 34em;
  color: var(--c-stone);
  line-height: 1.75;
}

.page-about .ab-rule {
  margin: 20px 0 0;
  padding: 0 0 0 0;
  list-style: none;
  counter-reset: ab-rule;
  display: grid;
  gap: 10px;
}

.page-about .ab-rule li {
  position: relative;
  padding: 12px 0 12px 44px;
  border-top: 1px solid var(--ab-line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-stone);
  counter-increment: ab-rule;
}

.page-about .ab-rule li::before {
  content: counter(ab-rule, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-amber);
}

.page-about .ab-rule strong {
  color: var(--c-cream);
  font-family: var(--font-display);
  font-weight: 900;
}

.page-about .ab-bands {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-band {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--c-felt);
  border: 1px solid var(--ab-line-soft);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut-sm)) 0, 100% var(--ab-cut-sm), 100% 100%, 0 100%);
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .ab-band::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 52px;
  height: 3px;
  background: var(--band-tone, var(--c-amber));
}

.page-about .ab-band:nth-child(1) { --band-tone: var(--c-amber); }
.page-about .ab-band:nth-child(2) { --band-tone: var(--c-orange); }
.page-about .ab-band:nth-child(3) { --band-tone: var(--c-vermil); }
.page-about .ab-band:nth-child(4) { --band-tone: var(--c-heart); }
.page-about .ab-band:nth-child(5) { --band-tone: var(--c-clay); }
.page-about .ab-band:nth-child(6) { --band-tone: var(--c-moss); }

.page-about .ab-band__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}

.page-about .ab-band h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

.page-about .ab-band p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--c-stone);
}

.page-about .ab-band:hover,
.page-about .ab-band:focus-visible {
  transform: translateY(-3px);
  border-color: var(--c-gold);
  background: var(--c-felt-deep);
}

.page-about .ab-band:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

@media (min-width: 640px) {
  .page-about .ab-bands {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .ab-levels__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .ab-levels__figure {
    margin-left: calc(var(--gutter) * -1.2);
  }

  .page-about .ab-bands {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 胜率样本 ---------- */
.page-about .ab-sample__layout {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .ab-sample__big {
  padding: clamp(20px, 3vw, 32px);
  background: linear-gradient(160deg, rgba(201, 162, 74, 0.16), rgba(243, 238, 228, 0));
  border: 1px solid var(--ab-line-ink);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-big {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-heart);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-big__label {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ab-ink-soft);
}

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

.page-about .ab-sample__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ab-line-ink);
}

.page-about .ab-sample__name {
  flex: 0 0 auto;
  min-width: 3.6em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--c-ink);
}

.page-about .ab-sample__desc {
  flex: 1 1 16em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ab-ink-soft);
}

.page-about .ab-sample__drop {
  margin-top: clamp(24px, 3vw, 40px);
  padding: 20px 22px;
  background: rgba(178, 94, 62, 0.1);
  border-left: 3px solid var(--c-clay);
}

.page-about .ab-sample__drop h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--c-ink);
}

.page-about .ab-sample__drop p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

@media (min-width: 900px) {
  .page-about .ab-sample__layout {
    grid-template-columns: 5fr 7fr;
    align-items: center;
  }
}

/* ---------- 赛季排期 ---------- */
.page-about .ab-season__figure {
  margin: clamp(20px, 3vw, 34px) 0 0;
}

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

.page-about .ab-season__line {
  list-style: none;
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-line-soft);
  border: 1px solid var(--ab-line-soft);
}

.page-about .ab-season__line li {
  padding: 20px 20px 24px;
  background: var(--c-felt);
}

.page-about .ab-season__line li::before {
  content: "";
  display: block;
  width: 26px;
  height: 3px;
  margin-bottom: 12px;
  background: var(--season-tone, var(--c-amber));
}

.page-about .ab-season__line li:nth-child(1) { --season-tone: var(--c-moss); }
.page-about .ab-season__line li:nth-child(2) { --season-tone: var(--c-amber); }
.page-about .ab-season__line li:nth-child(3) { --season-tone: var(--c-vermil); }
.page-about .ab-season__line li:nth-child(4) { --season-tone: var(--c-stone); }

.page-about .ab-season__line strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--c-cream);
}

.page-about .ab-season__line span {
  display: block;
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-stone);
}

@media (min-width: 780px) {
  .page-about .ab-season__line {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 团队与审核 ---------- */
.page-about .ab-tree-wrap {
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .ab-tree {
  display: block;
  width: 100%;
  min-width: 540px;
  max-width: 700px;
  height: auto;
  margin: 0 auto;
}

.page-about .ab-tree__lines path {
  fill: none;
  stroke: var(--ab-line);
  stroke-width: 1.5;
}

.page-about .ab-tree__node rect {
  fill: var(--c-felt);
  stroke: var(--ab-line-soft);
  stroke-width: 1.5;
  transition: fill 180ms ease, stroke 180ms ease;
}

.page-about .ab-tree__node text {
  fill: var(--c-cream);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  text-anchor: middle;
}

.page-about .ab-tree__node:hover rect,
.page-about .ab-tree__node:focus rect {
  fill: var(--c-felt-deep);
  stroke: var(--c-heart);
}

.page-about .ab-team__roles {
  gap: clamp(14px, 2vw, 22px);
}

.page-about .ab-role {
  padding: 20px 22px 24px;
  background: var(--c-felt);
  border: 1px solid var(--ab-line-soft);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut-sm)) 0, 100% var(--ab-cut-sm), 100% 100%, 0 100%);
}

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .ab-role__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--c-cream);
}

.page-about .ab-role__count {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-amber);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-role p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-stone);
}

.page-about .ab-review {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 3vw, 42px);
}

.page-about .ab-review__step {
  padding-top: 14px;
  border-top: 2px solid var(--c-gold);
}

.page-about .ab-review__step span {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-amber);
}

.page-about .ab-review__step h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  color: var(--c-cream);
}

.page-about .ab-review__step p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-stone);
}

@media (min-width: 760px) {
  .page-about .ab-review {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

/* ---------- 里程碑 ---------- */
.page-about .ab-mile__grid {
  display: grid;
  gap: 0;
}

.page-about .ab-mile__rail {
  display: none;
}

.page-about .ab-mile__rail-label {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(10, 10, 11, 0.5);
}

.page-about .ab-mile__rail-line {
  display: block;
  width: 2px;
  height: 340px;
  margin-top: 16px;
  background-image: repeating-linear-gradient(to bottom, var(--c-gold) 0 2px, transparent 2px 16px);
  opacity: 0.75;
}

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

.page-about .ab-mile__item {
  position: relative;
  padding: 24px 0 26px;
  border-top: 1px solid var(--ab-line-ink);
}

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

.page-about .ab-mile__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 56px;
  height: 2px;
  background: var(--c-gold);
  transform: skewX(-32deg);
  transform-origin: left top;
}

.page-about .ab-mile__item:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 6px;
}

.page-about .ab-mile__year {
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--c-heart);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-mile__item h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: -0.015em;
  color: var(--c-ink);
}

.page-about .ab-mile__item p {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ab-ink-soft);
}

@media (min-width: 920px) {
  .page-about .ab-mile__grid {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .ab-mile__rail {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }
}

/* ---------- 继续翻阅 ---------- */
.page-about .ab-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-line-soft);
  border: 1px solid var(--ab-line-soft);
}

.page-about .ab-next__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 14px 20px;
  background: var(--c-felt);
  color: var(--c-cream);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  transition: background-color 180ms ease;
}

.page-about .ab-next__list a::after {
  content: "→";
  font-family: var(--font-data);
  color: var(--c-amber);
}

.page-about .ab-next__list a:hover,
.page-about .ab-next__list a:focus-visible {
  background: var(--c-felt-deep);
  color: var(--c-cream);
}

.page-about .ab-next__list a:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: -2px;
}

@media (min-width: 760px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-band,
  .page-about .ab-tree__node rect,
  .page-about .ab-next__list a {
    transition: none;
  }

  .page-about .ab-band:hover,
  .page-about .ab-band:focus-visible {
    transform: none;
  }
}
<<<END>>>