.page-about {
  background: var(--yd-mist);
  color: var(--yd-ink);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .yd-breadcrumb {
  padding-top: clamp(14px, 2.2vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(18px, 3vw, 36px) 0 clamp(44px, 6vw, 82px);
}

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

.page-about .ab-hero__lead .yd-lead {
  margin-top: clamp(16px, 2vw, 22px);
  max-width: 40em;
  color: var(--yd-ink-2);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .ab-facts {
  background: var(--yd-paper);
  border: 1px solid var(--yd-rule);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: 9px 9px 0 -1px var(--yd-gold-light), 9px 9px 0 0 var(--yd-rule);
}

.page-about .ab-facts__title {
  margin: 0;
  font-family: var(--yd-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--yd-teal);
}

.page-about .ab-facts__list {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .ab-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--yd-rule);
}

.page-about .ab-fact:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-fact dt {
  font-family: var(--yd-display);
  font-size: 14px;
  color: var(--yd-ink-2);
}

.page-about .ab-fact dd {
  margin: 0;
  font-family: var(--yd-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: .01em;
  color: var(--yd-teal);
  white-space: nowrap;
}

.page-about .ab-unit {
  margin-left: 3px;
  font-family: var(--yd-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--yd-ink-2);
}

/* ---------- 起点分屏 ---------- */
.page-about .ab-origin {
  background: var(--yd-paper);
  border-top: 1px solid var(--yd-rule);
  border-bottom: 1px solid var(--yd-rule);
}

.page-about .ab-split {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
}

.page-about .ab-note {
  margin: 16px 0 0;
  font-family: var(--yd-mono);
  font-size: 13px;
  line-height: 2;
  letter-spacing: .04em;
  color: var(--yd-ink-2);
  padding-left: 14px;
  border-left: 2px solid var(--yd-gold);
}

.page-about .ab-split__main .yd-prose {
  margin-top: 14px;
}

.page-about .ab-steps {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ab-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--yd-rule);
}

.page-about .ab-steps li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-steps__n {
  font-family: var(--yd-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--yd-teal);
  padding-top: 5px;
}

.page-about .ab-steps__body h3 {
  margin: 0 0 6px;
}

.page-about .ab-steps__body p {
  margin: 0;
  font-family: var(--yd-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--yd-ink-2);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline-head .yd-lead {
  margin-top: 14px;
  max-width: 42em;
  color: var(--yd-ink-2);
}

.page-about .ab-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: clamp(22px, 3vw, 32px);
  padding: 12px 0;
  border-top: 1px solid var(--yd-rule);
  border-bottom: 1px solid var(--yd-rule);
}

.page-about .ab-jump__label {
  font-family: var(--yd-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--yd-ink-2);
}

.page-about .ab-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-jump__list a {
  display: inline-block;
  padding: 6px 13px;
  font-family: var(--yd-mono);
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--yd-teal);
  text-decoration: none;
  border: 1px solid var(--yd-teal-mist);
  background: var(--yd-paper);
  transition: background-color .2s ease, border-color .2s ease;
}

.page-about .ab-jump__list a:hover,
.page-about .ab-jump__list a:focus-visible {
  background: var(--yd-teal-mist);
  border-color: var(--yd-teal);
  outline: none;
}

.page-about .ab-timeline-media {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .ab-timeline-media .yd-media {
  border: 1px solid var(--yd-rule);
  background: var(--yd-paper);
}

.page-about .ab-timeline-media figcaption {
  margin-top: 10px;
}

.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0 0 0 26px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--yd-teal), var(--yd-teal-mist) 65%, var(--yd-rule));
}

.page-about .ab-tl {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 46px);
}

.page-about .ab-tl:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 11px;
  height: 11px;
  background: var(--yd-mist);
  border: 2px solid var(--yd-teal);
  border-radius: 50%;
  box-sizing: border-box;
  transition: background-color .25s ease, transform .25s ease;
}

.page-about .ab-tl:target::before {
  background: var(--yd-gold);
  border-color: var(--yd-gold);
  transform: scale(1.25);
}

.page-about .ab-tl__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .ab-tl__tag {
  font-family: var(--yd-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--yd-ink-2);
}

.page-about .ab-tl__num {
  font-family: var(--yd-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: .02em;
  color: var(--yd-teal);
  line-height: 1;
}

.page-about .ab-tl:target .ab-tl__num {
  color: var(--yd-gold);
}

.page-about .ab-tl__body h3 {
  margin: 0 0 10px;
}

.page-about .ab-tl__body p {
  margin: 0 0 10px;
  font-family: var(--yd-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--yd-ink-2);
}

.page-about .ab-tl__value {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--yd-gold);
  color: var(--yd-ink) !important;
  font-size: 15px !important;
}

/* ---------- 双栏图文 ---------- */
.page-about .ab-two {
  display: grid;
  gap: clamp(24px, 4vw, 50px);
}

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

.page-about .ab-two__figure .yd-media {
  border: 1px solid var(--yd-rule);
  box-shadow: var(--yd-shadow);
}

.page-about .ab-two__figure figcaption {
  margin-top: 10px;
}

.page-about .ab-two__text .yd-prose {
  margin-top: 14px;
}

.page-about .ab-team {
  background: var(--yd-paper);
  border-top: 1px solid var(--yd-rule);
  border-bottom: 1px solid var(--yd-rule);
}

.page-about .ab-team-list {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-team-list li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--yd-rule);
  font-family: var(--yd-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--yd-ink-2);
}

.page-about .ab-team-list li:last-child {
  border-bottom: 0;
}

.page-about .ab-team-list__n {
  font-family: var(--yd-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--yd-teal);
  white-space: nowrap;
}

.page-about .ab-team-list__n + span b {
  color: var(--yd-ink);
}

.page-about .ab-two__text > .yd-mono-note {
  display: block;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--yd-rule);
}

/* ---------- 行业（深色） ---------- */
.page-about .ab-industries {
  background: var(--yd-teal-deep);
  color: var(--yd-paper);
  padding: clamp(46px, 7vw, 96px) 0;
}

.page-about .ab-industries__head .yd-lead {
  margin-top: 14px;
  max-width: 44em;
  color: var(--yd-teal-mist);
}

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

.page-about .ab-chips {
  list-style: none;
  margin: clamp(28px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-chip {
  border: 1px solid rgba(201, 164, 107, .55);
  padding: 14px 16px;
  transition: border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.page-about .ab-chip:hover,
.page-about .ab-chip:focus-within {
  border-color: var(--yd-gold);
  background: rgba(201, 164, 107, .1);
  transform: translateY(-2px);
}

.page-about .ab-chip__name {
  display: block;
  font-family: var(--yd-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--yd-gold);
  margin-bottom: 6px;
}

.page-about .ab-chip__scene {
  display: block;
  font-family: var(--yd-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--yd-teal-mist);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: clamp(22px, 3vw, 30px);
  border-top: 1px solid rgba(216, 231, 228, .28);
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-stat__num {
  font-family: var(--yd-mono);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.05;
  letter-spacing: .01em;
  color: var(--yd-paper);
}

.page-about .ab-stat__plus {
  color: var(--yd-gold);
  margin-left: 1px;
}

.page-about .ab-stat__cap {
  font-family: var(--yd-display);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--yd-teal-mist);
}

/* ---------- 资质 ---------- */
.page-about .ab-checks {
  list-style: none;
  margin: clamp(20px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-checks li {
  position: relative;
  padding-left: 26px;
  font-family: var(--yd-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--yd-ink-2);
}

.page-about .ab-checks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .58em;
  width: 9px;
  height: 9px;
  border: 2px solid var(--yd-teal);
  transform: rotate(45deg);
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  background: var(--yd-gold-light);
  border-top: 1px solid var(--yd-rule);
  padding: clamp(44px, 6vw, 82px) 0;
}

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

.page-about .ab-cta__lead .yd-lead {
  margin-top: 14px;
  max-width: 30em;
  color: var(--yd-ink-2);
}

.page-about .ab-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .ab-cta__links li {
  border-top: 1px solid rgba(18, 23, 22, .16);
}

.page-about .ab-cta__links li:last-child {
  border-bottom: 1px solid rgba(18, 23, 22, .16);
}

.page-about .ab-cta__links a {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 18px;
  padding: 16px 4px;
  font-family: var(--yd-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--yd-ink);
  text-decoration: none;
  transition: transform .2s ease, color .2s ease;
}

.page-about .ab-cta__links a::after {
  content: "→";
  grid-column: 3;
  grid-row: 1;
  font-family: var(--yd-mono);
  font-size: 15px;
  color: var(--yd-teal);
  opacity: .6;
  transition: transform .2s ease, opacity .2s ease;
}

.page-about .ab-cta__links li a {
  grid-template-columns: minmax(0, 1fr) auto;
}

.page-about .ab-cta__desc {
  grid-column: 1;
  grid-row: 2;
  font-family: var(--yd-body);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.65;
  color: var(--yd-ink-2);
}

.page-about .ab-cta__links a:hover,
.page-about .ab-cta__links a:focus-visible {
  color: var(--yd-teal);
  outline: none;
}

.page-about .ab-cta__links a:hover::after,
.page-about .ab-cta__links a:focus-visible::after {
  transform: translateX(4px);
  opacity: 1;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-chips {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

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

  .page-about .ab-tl {
    display: grid;
    grid-template-columns: 152px minmax(0, 1fr);
    gap: 0 clamp(22px, 3vw, 44px);
    align-items: start;
  }

  .page-about .ab-tl__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .ab-two {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .ab-two--reverse {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .ab-two__figure {
    align-self: stretch;
  }

  .page-about .ab-cta__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

@media (min-width: 1120px) {
  .page-about .ab-chips {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .ab-chip {
    padding: 18px 16px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-chip,
  .page-about .ab-cta__links a,
  .page-about .ab-cta__links a::after,
  .page-about .ab-tl::before,
  .page-about .ab-jump__list a {
    transition: none;
  }

  .page-about .ab-chip:hover,
  .page-about .ab-chip:focus-within {
    transform: none;
  }

  .page-about .ab-cta__links a:hover::after,
  .page-about .ab-cta__links a:focus-visible::after {
    transform: none;
  }

  .page-about .ab-tl:target::before {
    transform: none;
  }
}
<<<END>>>