.page-about {
  --ab-rail-w: 104px;
  background: var(--paper);
  color: var(--char);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: calc(var(--header-h) + 24px) 0 56px;
}
.page-about .ab-hero .breadcrumb {
  margin-bottom: 28px;
}
.page-about .ab-hero__grid {
  display: grid;
  gap: 32px;
}
.page-about .ab-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-5);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.page-about .ab-hl {
  background: linear-gradient(180deg, transparent 64%, rgba(226, 58, 46, 0.26) 64%, rgba(226, 58, 46, 0.26) 94%, transparent 94%);
  padding: 0 0.04em;
  white-space: nowrap;
}
.page-about .ab-hero__lede {
  margin: 26px 0 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.85;
  color: var(--char);
}
.page-about .ab-hero__sign {
  margin: 22px 0 0;
  font-size: var(--step--1);
  letter-spacing: 0.08em;
  color: var(--index-gray);
}

/* 概况卡 */
.page-about .ab-facts {
  align-self: start;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 22px 22px 12px;
  box-shadow: 0 12px 32px rgba(20, 20, 20, 0.06);
}
.page-about .ab-facts__cap {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--rule);
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  color: var(--index-gray);
}
.page-about .ab-facts dl {
  margin: 0;
}
.page-about .ab-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--rule);
}
.page-about .ab-facts__row:last-child {
  border-bottom: 0;
}
.page-about .ab-facts dt {
  font-family: var(--font-body);
  font-size: var(--step--1);
  color: var(--index-gray);
}
.page-about .ab-facts dd {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: var(--step-0);
  color: var(--ink);
}
.page-about .ab-facts dd .mono {
  font-size: var(--step-1);
  color: var(--red-deep);
  margin-right: 2px;
}

/* ---------- 通用区块 ---------- */
.page-about .ab-sec {
  padding: 64px 0;
}
.page-about .ab-sec + .ab-sec {
  border-top: 1px solid var(--rule);
}
.page-about .ab-sec__head {
  max-width: 46em;
}
.page-about .ab-sec__head .section-title {
  margin: 10px 0 0;
}
.page-about .ab-sec__head .lede {
  margin: 16px 0 0;
  max-width: 36em;
}
.page-about .eyebrow .idx {
  margin-right: 0.5em;
  color: var(--red-deep);
}

/* ---------- 01 主张 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .ab-step {
  position: relative;
  padding: 24px 22px 24px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}
.page-about .ab-step:hover,
.page-about .ab-step:focus-within {
  border-color: var(--red);
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(20, 20, 20, 0.07);
}
.page-about .ab-step__no {
  display: inline-block;
  font-size: var(--step--1);
  letter-spacing: 0.1em;
  color: var(--red-deep);
}
.page-about .ab-step h3 {
  margin: 10px 0 8px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-1);
  color: var(--ink);
}
.page-about .ab-step p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.8;
}

/* ---------- 02 来路 ---------- */
.page-about .ab-sec--tl {
  background: var(--paper-2);
}
.page-about .ab-tape {
  margin: 0 0 36px;
}
.page-about .ab-tape img {
  display: block;
  width: 100%;
  height: 110px;
  object-fit: cover;
}
.page-about .ab-tl {
  display: grid;
  gap: 24px;
  margin-top: 32px;
}
.page-about .ab-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 10px;
  margin: 0;
  -webkit-overflow-scrolling: touch;
}
.page-about .ab-rail a {
  flex: 0 0 auto;
  padding: 7px 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--index-gray);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-about .ab-rail a:hover,
.page-about .ab-rail a:focus-visible {
  color: var(--red-deep);
  border-color: var(--red);
  background: var(--shade);
}

.page-about .ab-stages {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .ab-stage {
  position: relative;
  padding: 0 0 30px 26px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 22px;
  bottom: 0;
  border-left: 2px dashed var(--rule);
}
.page-about .ab-stage:last-child::before {
  display: none;
}
.page-about .ab-stage::after {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper-2);
  border: 3px solid var(--red);
}
.page-about .ab-stage:last-child::after {
  background: var(--red);
}
.page-about .ab-stage__card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 22px;
  transform: rotate(-0.35deg);
  box-shadow: 0 8px 20px rgba(20, 20, 20, 0.04);
}
.page-about .ab-stage__year {
  margin: 0;
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  color: var(--red-deep);
}
.page-about .ab-stage__card h3 {
  margin: 8px 0 10px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-2);
  line-height: 1.35;
  color: var(--ink);
}
.page-about .ab-stage__card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.85;
}
.page-about .ab-stage__media {
  margin: 18px 0 0;
}

/* ---------- 03 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: 28px;
  margin-top: 34px;
}
.page-about .ab-team__chart {
  text-align: center;
}
.page-about .ab-team__chart svg {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 0 auto;
}
.page-about .ab-team__total {
  margin: 12px 0 0;
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--index-gray);
}
.page-about .ab-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .ab-team__item {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}
.page-about .ab-team__item:hover,
.page-about .ab-team__item:focus-within {
  border-color: var(--gold);
  background: var(--shade);
}
.page-about .ab-team__dot {
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 50%;
}
.page-about .ab-team__dot--red { background: var(--red); }
.page-about .ab-team__dot--green { background: var(--celadon); }
.page-about .ab-team__dot--gold { background: var(--gold); }
.page-about .ab-team__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-1);
  color: var(--ink);
}
.page-about .ab-team__item h3 .mono {
  color: var(--red-deep);
}
.page-about .ab-team__item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.82;
}
.page-about .ab-team__media {
  margin: 28px 0 0;
  max-width: 520px;
}

/* ---------- 04 覆盖 ---------- */
.page-about .ab-cover__grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}
.page-about .ab-cover__card {
  padding: 26px 24px;
  border-radius: var(--radius-lg);
}
.page-about .ab-cover__card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-2);
  line-height: 1.35;
}
.page-about .ab-cover__card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.82;
}
.page-about .ab-cover__card--ink {
  background: var(--ink);
  color: var(--paper);
}
.page-about .ab-cover__card--ink h3 {
  color: var(--paper);
}
.page-about .ab-cover__card--paper {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  box-shadow: inset 0 0 0 1px rgba(217, 164, 65, 0.22);
}
.page-about .ab-cover__card--paper h3 {
  color: var(--ink);
}
.page-about .ab-quote {
  margin: 30px 0 0;
  padding: 22px 24px;
  background: var(--shade);
  border-left: 6px solid var(--red);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.page-about .ab-quote p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 05 衡量 ---------- */
.page-about .ab-measure {
  background: var(--shade);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.page-about .ab-measure__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
}
.page-about .ab-measure__list li {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--rule);
}
.page-about .ab-measure__list li:first-child {
  border-top: 1px dashed var(--rule);
}
.page-about .ab-measure__num {
  font-size: var(--step-2);
  letter-spacing: 0.02em;
  color: var(--ink);
}
.page-about .ab-measure__k {
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--char);
}

/* ---------- 06 伙伴 ---------- */
.page-about .ab-partner__grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}
.page-about .ab-partner__card {
  padding: 24px 22px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  transform: rotate(-0.4deg);
}
.page-about .ab-partner__card:nth-child(2) {
  transform: rotate(0.5deg);
}
.page-about .ab-partner__card:nth-child(3) {
  transform: rotate(-0.2deg);
}
.page-about .ab-partner__count {
  margin: 0;
  font-size: var(--step-2);
  color: var(--red-deep);
  letter-spacing: 0.02em;
}
.page-about .ab-partner__card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-1);
  color: var(--ink);
}
.page-about .ab-partner__card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.8;
}
.page-about .ab-partner__more {
  margin: 26px 0 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--char);
}
.page-about .ab-partner__more a {
  color: var(--red-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.page-about .ab-partner__more a:hover {
  color: var(--red);
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  padding: 60px 0 88px;
}
.page-about .ab-cta__inner {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
}
.page-about .ab-cta__inner h2 {
  margin: 0 0 12px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.3;
  color: var(--paper);
}
.page-about .ab-cta__inner p {
  margin: 0 0 22px;
  max-width: 38em;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.8;
  color: rgba(245, 240, 232, 0.78);
}
.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .ab-cta__actions .btn--ghost {
  color: var(--paper);
  border-color: rgba(245, 240, 232, 0.45);
}
.page-about .ab-cta__actions .btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-facts {
    transform: rotate(-0.5deg);
  }
  .page-about .ab-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-cover__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-partner__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-measure__list li {
    grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }
  .page-about .ab-tape img {
    height: 150px;
  }
  .page-about .ab-cta__inner {
    padding: 44px 40px;
  }
}

@media (min-width: 860px) {
  .page-about .ab-hero {
    padding-top: calc(var(--header-h) + 48px);
    padding-bottom: 80px;
  }
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .ab-sec {
    padding: 96px 0;
  }
  .page-about .ab-tl {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .ab-rail {
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    position: sticky;
    top: calc(var(--header-h) + 32px);
    padding: 0;
    margin: 0;
    gap: 2px;
  }
  .page-about .ab-rail a {
    border: 0;
    border-left: 2px solid var(--rule);
    border-radius: 0;
    padding: 9px 0 9px 16px;
    background: transparent;
    letter-spacing: 0.1em;
  }
  .page-about .ab-rail a:hover,
  .page-about .ab-rail a:focus-visible {
    border-left-color: var(--red);
    background: transparent;
  }
  .page-about .ab-stage {
    padding-left: 34px;
    padding-bottom: 40px;
  }
  .page-about .ab-stage::before {
    left: 8px;
  }
  .page-about .ab-stage::after {
    left: 1px;
    width: 16px;
    height: 16px;
  }
  .page-about .ab-stage__card {
    max-width: 640px;
    padding: 28px 30px;
  }
  .page-about .ab-stage:nth-child(even) .ab-stage__card {
    margin-left: 28px;
    transform: rotate(0.45deg);
  }
  .page-about .ab-team {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .ab-team__media {
    margin-top: 40px;
  }
  .page-about .ab-cta {
    padding: 80px 0 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-step,
  .page-about .ab-rail a,
  .page-about .ab-team__item {
    transition: none;
  }
  .page-about .ab-step:hover,
  .page-about .ab-step:focus-within {
    transform: none;
  }
  .page-about .ab-stage__card,
  .page-about .ab-partner__card,
  .page-about .ab-facts {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>