.page-about {
  --ab-line: rgba(110, 143, 166, 0.38);
  --ab-line-strong: rgba(110, 143, 166, 0.7);
  --ab-card-gap: 20px;
  background: var(--paper-50);
  color: var(--ink-900);
  overflow-x: hidden;
}

.page-about a {
  color: inherit;
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb {
  padding-top: 18px;
  padding-bottom: 14px;
}

/* ---------- 通用章节头 ---------- */
.page-about .ab-sechead {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 44px);
  max-width: 62ch;
}

.page-about .ab-sechead__num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--blue-400);
  border-left: 3px solid var(--acid-400);
  padding-left: 8px;
  line-height: 1.2;
}

.page-about .ab-sechead__title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5.6vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about .ab-sechead__desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  max-width: 66ch;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding-block: clamp(40px, 7vw, 90px);
  border-bottom: 3px solid var(--acid-400);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-hero__label {
  color: var(--acid-400);
  margin: 0 0 14px;
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 9vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--chalk-50);
}

.page-about .ab-hero__title span {
  color: var(--acid-400);
}

.page-about .ab-hero__sub {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(253, 253, 249, 0.86);
}

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

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: start;
}

.page-about .ab-stat {
  border: 3px solid var(--acid-400);
  background: var(--ink-800);
  padding: 14px 14px 12px;
  display: grid;
  gap: 6px;
}

.page-about .ab-stat:nth-child(2) {
  transform: rotate(1.2deg);
}

.page-about .ab-stat:nth-child(3) {
  transform: rotate(-1.4deg);
}

.page-about .ab-stat__num {
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  font-weight: 600;
  color: var(--acid-200);
  line-height: 1;
}

.page-about .ab-stat__cap {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(253, 253, 249, 0.78);
}

/* ---------- 服务人群 ---------- */
.page-about .ab-who {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .ab-who__grid {
  display: grid;
  gap: var(--ab-card-gap);
}

.page-about .ab-card {
  display: grid;
  gap: 12px;
  align-content: start;
  border-left: 5px solid var(--acid-400);
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .ab-card:hover {
  transform: translateY(-4px);
}

.page-about .ab-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.6vw, 1.5rem);
  line-height: 1.28;
}

.page-about .ab-card__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(20, 24, 26, 0.86);
}

.page-about .ab-card__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue-400);
  border-top: 2px dashed var(--paper-200);
  padding-top: 8px;
}

.page-about .ab-card__link {
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 3px solid var(--acid-400);
  padding-bottom: 2px;
  justify-self: start;
}

.page-about .ab-card__link:hover {
  background: var(--acid-200);
}

/* ---------- 发展历程 ---------- */
.page-about .ab-tl-sec {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .ab-tl__figure {
  margin: 0 0 clamp(28px, 5vw, 52px);
  max-width: 900px;
}

.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: linear-gradient(to bottom, var(--acid-400), var(--ember-500) 70%, var(--blue-400));
}

.page-about .ab-tl__item {
  position: relative;
  margin-bottom: 26px;
}

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

.page-about .ab-tl__dot {
  position: absolute;
  left: -30px;
  top: 16px;
  width: 17px;
  height: 17px;
  background: var(--paper-50);
  border: 3px solid var(--ink-950);
}

.page-about .ab-tl__item--now .ab-tl__dot {
  background: var(--ember-500);
  border-color: var(--ink-950);
  box-shadow: 0 0 0 4px rgba(242, 116, 58, 0.22);
}

.page-about .ab-tl__card {
  border: 3px solid var(--ink-950);
  background: var(--paper-50);
  box-shadow: var(--shadow-1);
  padding: 16px 16px 18px;
  display: grid;
  gap: 8px;
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .ab-tl__card:hover {
  transform: translate(4px, -4px);
  box-shadow: var(--shadow-2);
}

.page-about .ab-tl__item--now .ab-tl__card {
  background: var(--ink-800);
  color: var(--chalk-50);
  box-shadow: 6px 0 0 var(--ember-500);
}

.page-about .ab-tl__item--now .ab-tl__card:hover {
  box-shadow: 10px 0 0 var(--ember-500);
}

.page-about .ab-tl__ver {
  display: inline-block;
  justify-self: start;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  background: var(--acid-400);
  color: var(--ink-950);
  border: 2px solid var(--ink-950);
  padding: 3px 8px;
  transform: rotate(-1.5deg);
}

.page-about .ab-tl__item--now .ab-tl__ver {
  background: var(--ember-500);
  border-color: var(--ember-500);
  color: var(--ink-950);
}

.page-about .ab-tl__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.42;
}

.page-about .ab-tl__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(20, 24, 26, 0.84);
}

.page-about .ab-tl__item--now .ab-tl__body {
  color: rgba(253, 253, 249, 0.86);
}

.page-about .ab-tl__link {
  justify-self: start;
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 3px solid var(--acid-400);
  padding-bottom: 2px;
}

/* ---------- 内容栏目 ---------- */
.page-about .ab-catalog {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .ab-catalog__grid {
  display: grid;
  gap: 14px;
}

.page-about .ab-col {
  border-top: 3px solid var(--ink-950);
  padding: 14px 2px 16px;
  display: grid;
  gap: 8px;
  background: linear-gradient(to bottom, rgba(227, 217, 196, 0.42), rgba(227, 217, 196, 0));
}

.page-about .ab-col__num {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--blue-400);
}

.page-about .ab-col__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.page-about .ab-col__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(20, 24, 26, 0.82);
}

.page-about .ab-catalog__note {
  margin: 28px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--ink-950);
  background: var(--paper-200);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .ab-catalog__note a {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 3px solid var(--acid-400);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 28px;
}

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

.page-about .ab-team__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .ab-role {
  border: 3px solid var(--ink-950);
  background: var(--paper-50);
  padding: 16px;
  display: grid;
  gap: 8px;
  box-shadow: var(--shadow-1);
}

.page-about .ab-role__tag {
  justify-self: start;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  background: var(--ink-950);
  color: var(--acid-400);
  padding: 3px 8px;
}

.page-about .ab-role__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.page-about .ab-role__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(20, 24, 26, 0.84);
}

.page-about .ab-team__note {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--ember-500);
  background: rgba(242, 116, 58, 0.09);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .ab-team__note a {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 3px solid var(--ember-500);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partner {
  padding-block: clamp(44px, 7vw, 88px);
  border-top: 3px solid var(--paper-200);
}

.page-about .ab-partner__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-partner__wall {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .ab-wall {
  border-left: 3px solid var(--blue-400);
  padding-left: 14px;
}

.page-about .ab-wall__cap {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-900);
  text-transform: uppercase;
}

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

.page-about .ab-chip {
  font-size: 13px;
  font-weight: 600;
  border: 2px solid var(--ink-950);
  background: var(--acid-200);
  padding: 5px 10px;
  transform: rotate(-1.2deg);
}

.page-about .ab-chip:nth-child(even) {
  transform: rotate(1.4deg);
}

.page-about .ab-chip--ember {
  background: rgba(242, 116, 58, 0.2);
  border-color: var(--ember-500);
}

.page-about .ab-chip--flat {
  background: var(--paper-50);
  border-color: var(--blue-400);
}

.page-about .ab-partner__aside {
  display: grid;
  gap: 22px;
  align-content: start;
}

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

.page-about .ab-awards {
  border: 3px solid var(--ink-950);
  background: var(--ink-950);
  color: var(--chalk-50);
  padding: 16px;
}

.page-about .ab-awards__cap {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--acid-400);
}

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

.page-about .ab-award {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(253, 253, 249, 0.28);
}

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

.page-about .ab-award__year {
  color: var(--acid-400);
  font-size: 14px;
  font-weight: 600;
}

.page-about .ab-award__text {
  font-size: 14.5px;
  line-height: 1.6;
}

/* ---------- 合规收束 ---------- */
.page-about .ab-legal {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-about .ab-legal__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-legal__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.8rem);
  line-height: 1.1;
  margin: 12px 0 16px;
  color: var(--chalk-50);
}

.page-about .ab-legal__body {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(253, 253, 249, 0.86);
}

.page-about .ab-legal__icp {
  color: var(--acid-400);
  font-weight: 600;
}

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

.page-about .ab-legal__facts {
  margin: 0;
  display: grid;
  gap: 0;
  border: 3px solid var(--acid-400);
  background: var(--ink-800);
}

.page-about .ab-legal__row {
  display: grid;
  grid-template-columns: minmax(84px, auto) 1fr;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid rgba(216, 245, 49, 0.28);
  align-items: baseline;
}

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

.page-about .ab-legal__row dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--acid-400);
}

.page-about .ab-legal__row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--chalk-50);
}

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

  .page-about .ab-catalog__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .ab-stats {
    padding-bottom: 6px;
  }

  .page-about .ab-who__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .ab-who__grid > .ab-card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .ab-who__grid > .ab-card:nth-child(3) {
    margin-top: 14px;
  }

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

  .page-about .ab-tl {
    padding-left: 46px;
  }

  .page-about .ab-tl::before {
    left: 10px;
  }

  .page-about .ab-tl__item {
    width: min(100%, 760px);
  }

  .page-about .ab-tl__item:nth-child(even) {
    margin-left: 56px;
  }

  .page-about .ab-tl__dot {
    left: -46px;
    top: 20px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-team__figure {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .ab-partner__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-legal__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-catalog__grid {
    gap: 22px 32px;
  }

  .page-about .ab-tl__item:nth-child(even) {
    margin-left: 96px;
  }
}

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

  .page-about .ab-card:hover,
  .page-about .ab-tl__card:hover {
    transform: none;
  }
}