.page-about {
  --ab-gold-soft: rgba(201, 146, 46, 0.12);
  --ab-panel-line: rgba(251, 247, 239, 0.18);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: 14px;
  padding-bottom: 6px;
  font-family: var(--font-head);
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(22px, 3.4vw, 44px) 0 clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
  background-image: linear-gradient(118deg, rgba(240, 230, 210, 0) 0 56%, rgba(240, 230, 210, 0.92) 56% 100%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(64px, 12vw, 168px);
  height: 4px;
  background: var(--pomegranate);
}

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

.page-about .ab-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.07;
  letter-spacing: -0.02em;
  margin: 14px 0 20px;
  color: var(--ink);
  max-width: 18em;
}

.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--pomegranate);
  box-shadow: inset 0 -0.3em 0 var(--ab-gold-soft);
}

.page-about .ab-hero__lead .lede {
  max-width: 40em;
  color: var(--ink);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__panel {
  background: var(--indigo);
  color: var(--paper);
  padding: clamp(22px, 3vw, 34px);
  border-left: 4px solid var(--gold);
}

.page-about .ab-hero__year {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(52px, 10vw, 88px);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  margin: 0 0 6px;
}

.page-about .ab-hero__yearnote {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.82);
  font-family: var(--font-head);
}

.page-about .ab-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-hero__facts li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--ab-panel-line);
}

.page-about .ab-hero__facts .stat-num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 30px;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-hero__facts .stat-label {
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(251, 247, 239, 0.8);
  font-family: var(--font-head);
}

/* ---------- 章节头 ---------- */
.page-about .chapter-head {
  display: grid;
  gap: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .chapter-index {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  margin: 0;
}

.page-about .chapter-body .title-lg {
  margin: 6px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
}

.page-about .chapter-body .lede {
  margin: 12px 0 0;
  max-width: 46em;
}

/* ---------- 01 起点 ---------- */
.page-about .ab-split {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .ab-split__main.prose p {
  margin: 0 0 1.1em;
  line-height: 1.9;
}

.page-about .ab-split__main.prose p:last-child {
  margin-bottom: 0;
}

.page-about .ab-split__main.prose p:first-child::first-letter {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 2.6em;
  line-height: 1;
  float: left;
  margin: 0.06em 0.14em 0 0;
  color: var(--pomegranate);
}

.page-about .ab-tax {
  background: var(--sand);
  border-top: 3px solid var(--oasis);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .ab-tax__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.01em;
  margin: 0 0 16px;
  color: var(--ink);
}

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

.page-about .ab-tax__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-head);
  font-size: 15.5px;
  color: var(--ink);
}

.page-about .ab-tax__list li span {
  font-weight: 900;
  font-size: 12px;
  color: var(--oasis);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.page-about .ab-tax__note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink);
  opacity: 0.78;
}

/* ---------- 02 团队构成 ---------- */
.page-about .ab-team {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .ab-team__bars {
  display: grid;
}

.page-about .ab-bar {
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--line);
  transition: border-color 180ms var(--ease);
}

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

.page-about .ab-bar:hover,
.page-about .ab-bar:focus-visible {
  border-bottom-color: var(--pomegranate);
  outline: none;
}

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

.page-about .ab-bar__role {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .ab-bar__num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-bar__num small {
  font-size: 13px;
  font-weight: 600;
  color: var(--slate);
  margin-left: 3px;
}

.page-about .ab-bar__track {
  margin-top: 11px;
  height: 10px;
  background: rgba(28, 40, 54, 0.09);
  overflow: hidden;
}

.page-about .ab-bar__fill {
  display: block;
  height: 100%;
  transition: width 480ms var(--ease);
}

.page-about .ab-bar__fill--edit {
  background: var(--oasis);
}

.page-about .ab-bar__fill--advise {
  background: var(--pomegranate);
}

.page-about .ab-bar__fill--tech {
  background: var(--gold);
}

.page-about .ab-bar:hover .ab-bar__fill,
.page-about .ab-bar:focus-visible .ab-bar__fill {
  filter: saturate(1.25) brightness(1.05);
}

.page-about .ab-bar__note {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--indigo);
  max-width: 46em;
}

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

/* ---------- 通用图片 ---------- */
.page-about .media-frame {
  margin: 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-caption {
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 03 流程 ---------- */
.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-flow__step {
  position: relative;
  padding: 0 0 26px 34px;
}

.page-about .ab-flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--paper);
  border: 1px solid var(--pomegranate);
}

.page-about .ab-flow__step::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

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

.page-about .ab-flow__step:last-child::after {
  display: none;
}

.page-about .ab-flow__no {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-flow__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  margin: 6px 0 8px;
  color: var(--ink);
}

.page-about .ab-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--indigo);
  max-width: 34em;
}

.page-about .ab-note {
  margin-top: clamp(24px, 4vw, 40px);
  padding: 18px 22px;
  border-left: 3px solid var(--gold);
  background: var(--sand);
}

.page-about .ab-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 04 时间线 ---------- */
.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 40px;
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--oasis);
  opacity: 0.45;
}

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding-bottom: 28px;
}

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

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 5px;
  width: 15px;
  height: 15px;
  background: var(--paper);
  border: 1px solid var(--gold);
}

.page-about .ab-tl__year {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 24px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--pomegranate);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.page-about .ab-tl__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--indigo);
  max-width: 40em;
}

.page-about .ab-tl__more {
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-family: var(--font-head);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .ab-tl__more .link-arrow {
  color: var(--oasis);
}

/* ---------- 05 培训 ---------- */
.page-about .ab-train {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .ab-train__body p {
  margin: 0 0 1em;
  line-height: 1.9;
  font-size: 16px;
}

.page-about .ab-figures {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-figures__item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .ab-figures__num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-figures__lab {
  font-family: var(--font-head);
  font-size: 14px;
  line-height: 1.7;
  color: var(--indigo);
}

/* ---------- 06 服务网络 ---------- */
.page-about .ab-network__media {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .ab-network__grid {
  display: grid;
  gap: 18px;
}

.page-about .ab-network__card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--pomegranate);
  padding: clamp(18px, 2.6vw, 26px);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .ab-network__card:hover {
  transform: translateY(-2px);
  border-color: var(--pomegranate);
}

.page-about .ab-network__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-network__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--oasis);
}

.page-about .ab-network__card p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--indigo);
}

/* ---------- 收束 ---------- */
.page-about .ab-cta {
  background: var(--indigo);
  color: var(--paper);
  border-bottom: 4px solid var(--gold);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: end;
}

.page-about .ab-cta .kicker--light {
  color: var(--gold);
}

.page-about .ab-cta .title-lg {
  margin: 10px 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .ab-cta p {
  margin: 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(251, 247, 239, 0.85);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-cta .btn-ghost {
  border-color: rgba(251, 247, 239, 0.55);
  color: var(--paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-about .ab-hero__actions .btn,
  .page-about .ab-cta__actions .btn {
    min-width: 190px;
    justify-content: center;
  }

  .page-about .chapter-head {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .ab-tl {
    padding-left: 44px;
  }

  .page-about .ab-tl__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .ab-tl__item::before {
    left: -44px;
    top: 3px;
  }

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

  .page-about .ab-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-figures__item {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    gap: 8px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .ab-flow__step {
    padding: 30px 0 0;
  }

  .page-about .ab-flow__step::before {
    left: 0;
    top: 0;
  }

  .page-about .ab-flow__step::after {
    left: 0;
    top: 5px;
    right: -26px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .ab-flow__text {
    max-width: none;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
    align-items: start;
  }

  .page-about .ab-train {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

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

  .page-about .ab-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-bar__fill,
  .page-about .ab-network__card,
  .page-about .ab-bar {
    transition: none;
  }

  .page-about .ab-network__card:hover {
    transform: none;
  }
}