.page-about {
  --ab-hair: rgba(36, 54, 84, .85);
  --ab-hair-soft: rgba(27, 42, 68, .6);
  --ab-panel: rgba(11, 18, 32, .66);
  display: block;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(27, 42, 68, .2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 42, 68, .2) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: 0 0;
  color: var(--white);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumbs {
  padding-top: calc(var(--bar-h) + 18px);
}
.page-about .breadcrumbs__item [aria-current="page"] {
  color: var(--gray);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(18px, 3vw, 36px) 0 clamp(44px, 6vw, 80px);
}
.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.page-about .ab-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.2vw, 54px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--white);
  max-width: 20ch;
}
.page-about .ab-hero__lead {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.35vw, 17.5px);
  line-height: 1.8;
  color: var(--white);
  max-width: 62ch;
}
.page-about .ab-hero__lead--sub {
  color: var(--gray);
}
.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}
.page-about .ab-hero__figure {
  margin: 0;
}
.page-about .ab-hero__figure .media__frame {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid var(--ab-hair);
  border-top: 2px solid var(--cyan);
  background: var(--ink-2);
}
.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .ab-hero__figure .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--gray);
  letter-spacing: .04em;
}

/* ---------- 首屏数据条 ---------- */
.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(30px, 4vw, 54px);
  background: var(--ab-hair);
  border-top: 1px solid var(--ab-hair);
  border-bottom: 1px solid var(--ab-hair);
}
.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px 22px;
  background: var(--ink);
}
.page-about .ab-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
}
.page-about .ab-stat__plus {
  font-size: .6em;
  vertical-align: super;
}
.page-about .ab-stat:nth-child(1) .ab-stat__value { color: var(--green); }
.page-about .ab-stat:nth-child(2) .ab-stat__value { color: var(--cyan); }
.page-about .ab-stat:nth-child(3) .ab-stat__value { color: var(--orange); }
.page-about .ab-stat:nth-child(4) .ab-stat__value { color: var(--purple); }
.page-about .ab-stat__label {
  font-size: 14px;
  color: var(--white);
}
.page-about .ab-stat__foot {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--gray);
}

/* ---------- 通用区块 ---------- */
.page-about .ab-band {
  position: relative;
  padding: clamp(52px, 7.5vw, 112px) 0;
  border-top: 1px solid var(--ab-hair-soft);
  scroll-margin-top: calc(var(--bar-h) + 20px);
}
.page-about .ab-band--alt {
  background: linear-gradient(180deg, rgba(11, 18, 32, .78) 0%, rgba(5, 7, 12, 0) 78%);
}
.page-about .section-head {
  margin-bottom: clamp(26px, 4vw, 52px);
}
.page-about .ab-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 227, 211, .45);
  padding-bottom: 1px;
  transition: color .18s ease, border-color .18s ease;
}
.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 01 业务主线 ---------- */
.page-about .ab-role__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 48px);
}
.page-about .ab-role__col {
  border-top: 1px solid var(--ab-hair);
  padding-top: 20px;
}
.page-about .ab-role__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}
.page-about .ab-role__col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray);
}

/* ---------- 02 赛季刻度与时间轴 ---------- */
.page-about .ab-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: clamp(30px, 4vw, 52px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ab-hair);
}
.page-about .ab-scale__tick {
  flex: 1 1 56px;
  min-width: 52px;
  padding: 10px 2px 11px;
  text-align: center;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray);
  text-decoration: none;
  border-bottom: 2px solid rgba(27, 42, 68, .9);
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.page-about .ab-scale__tick:hover,
.page-about .ab-scale__tick:focus-visible {
  color: var(--white);
  background: var(--accent-soft);
  border-bottom-color: var(--accent);
}

.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 4.6vw, 58px);
}
.page-about .ab-tl__item {
  position: relative;
  padding-left: 34px;
  scroll-margin-top: calc(var(--bar-h) + 24px);
}
.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.page-about .ab-tl__item::after {
  content: "";
  position: absolute;
  left: 8px;
  top: 26px;
  bottom: -46px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-line), rgba(27, 42, 68, .25));
}
.page-about .ab-tl__item:last-child::after {
  content: none;
}
.page-about .ab-tl__axis {
  margin-bottom: 10px;
}
.page-about .ab-tl__idx {
  display: block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--accent);
}
.page-about .ab-tl__span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
}
.page-about .ab-tl__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}
.page-about .ab-tl__body > p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray);
  max-width: 70ch;
}
.page-about .ab-tl__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}
.page-about .ab-tl__fact {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  padding: 6px 12px;
  font-size: 12.5px;
  color: var(--white);
  border: 1px solid var(--ab-hair);
  border-radius: var(--radius);
  background: var(--ab-panel);
}
.page-about .ab-tl__fact b {
  color: var(--accent);
  font-size: 14px;
}

/* ---------- 03 归档工作流 ---------- */
.page-about .ab-figure {
  margin: 0 0 clamp(28px, 4vw, 48px);
}
.page-about .ab-figure .media__frame {
  aspect-ratio: 12 / 7;
  overflow: hidden;
  border: 1px solid var(--ab-hair);
  background: var(--ink-2);
}
.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .ab-figure .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--gray);
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}
.page-about .ab-flow__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--ink);
  border-left: 2px solid transparent;
  transition: border-color .2s ease, background-color .2s ease;
  outline: none;
}
.page-about .ab-flow__item:hover,
.page-about .ab-flow__item:focus-visible,
.page-about .ab-flow__item:focus-within {
  border-left-color: var(--accent);
  background: var(--ink-2);
}
.page-about .ab-flow__no {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
}
.page-about .ab-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}
.page-about .ab-flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}
.page-about .ab-flow__out {
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(27, 42, 68, .95);
  font-size: 12.5px;
  color: var(--white);
}
.page-about .ab-flow__outlabel {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 7px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: var(--radius);
}

/* ---------- 04 团队 ---------- */
.page-about .ab-team-banner {
  margin: 0 0 clamp(22px, 3vw, 36px);
}
.page-about .ab-team-banner .media__frame {
  aspect-ratio: 2 / 1;
  overflow: hidden;
  border: 1px solid var(--ab-hair);
  background: var(--ink-2);
}
.page-about .ab-team-banner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .ab-team-banner .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--gray);
}

.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}
.page-about .ab-team__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--ab-panel);
  border-top: 2px solid var(--accent);
}
.page-about .ab-team__card:nth-child(1) { border-top-color: var(--cyan); }
.page-about .ab-team__card:nth-child(2) { border-top-color: var(--orange); }
.page-about .ab-team__card:nth-child(3) { border-top-color: var(--purple); }
.page-about .ab-team__card:nth-child(4) { border-top-color: var(--green); }
.page-about .ab-team__no {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gray);
}
.page-about .ab-team__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}
.page-about .ab-team__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}
.page-about .ab-team__list {
  list-style: none;
  margin: auto 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--ab-hair);
  display: grid;
  gap: 7px;
}
.page-about .ab-team__list li {
  position: relative;
  padding-left: 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--white);
}
.page-about .ab-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--accent);
}

/* ---------- 05 可视化 ---------- */
.page-about .ab-charts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
}
.page-about .ab-chart {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--ab-panel);
  border: 1px solid var(--ab-hair);
  color: var(--cyan);
}
.page-about .ab-chart:nth-child(2) { color: var(--orange); }
.page-about .ab-chart:nth-child(3) { color: var(--purple); }
.page-about .ab-chart__svg {
  display: block;
  width: 100%;
  height: 86px;
  overflow: visible;
}
.page-about .ab-chart__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}
.page-about .ab-chart__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--gray);
}
.page-about .ab-chart__use {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--ab-hair);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--white);
}

/* ---------- 06 协作生态 ---------- */
.page-about .ab-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 48px);
  margin-bottom: clamp(24px, 3.4vw, 40px);
}
.page-about .ab-eco__main p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray);
  max-width: 66ch;
}
.page-about .ab-eco__main p:last-child {
  margin-bottom: 0;
}
.page-about .ab-eco__side {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  align-self: start;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}
.page-about .ab-eco__spot {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--ink);
}
.page-about .ab-eco__spotlabel {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
}
.page-about .ab-eco__spotnum {
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-about .ab-eco__spot:nth-child(1) .ab-eco__spotnum { color: var(--cyan); }
.page-about .ab-eco__spot:nth-child(2) .ab-eco__spotnum { color: var(--purple); }
.page-about .ab-eco__spot:nth-child(3) .ab-eco__spotnum { color: var(--orange); }
.page-about .ab-eco__spot:nth-child(4) .ab-eco__spotnum { color: var(--green); }

.page-about .ab-eco__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .ab-eco__tag {
  padding: 8px 14px;
  font-size: 12.5px;
  color: var(--gray);
  border: 1px solid var(--ab-hair);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, .5);
  transition: color .18s ease, border-color .18s ease;
}
.page-about .ab-eco__tag:hover {
  color: var(--white);
  border-color: var(--accent-line);
}

/* ---------- 07 合作方式 ---------- */
.page-about .ab-coop {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 26px);
}
.page-about .ab-coop__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 2.6vw, 32px);
  background: linear-gradient(160deg, rgba(11, 18, 32, .92) 0%, rgba(5, 7, 12, .45) 100%);
  border: 1px solid var(--ab-hair);
}
.page-about .ab-coop__card::before {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  background: var(--cyan);
}
.page-about .ab-coop__card:nth-child(2)::before { background: var(--orange); }
.page-about .ab-coop__card:nth-child(3)::before { background: var(--green); }
.page-about .ab-coop__for {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gray);
}
.page-about .ab-coop__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 1.8vw, 21px);
  font-weight: 700;
  color: var(--white);
}
.page-about .ab-coop__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--gray);
}
.page-about .ab-coop__deliver {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(27, 42, 68, .95);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--white);
}
.page-about .ab-coop__deliverlabel {
  display: inline-block;
  margin-right: 8px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  border-top: 1px solid var(--ab-hair);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(34, 227, 211, .1) 0%, rgba(5, 7, 12, 0) 58%),
    linear-gradient(180deg, rgba(11, 18, 32, .55) 0%, rgba(5, 7, 12, 0) 100%);
}
.page-about .ab-cta__inner {
  max-width: 780px;
}
.page-about .ab-cta__eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}
.page-about .ab-cta__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--white);
}
.page-about .ab-cta__text {
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray);
}
.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

@media (min-width: 860px) {
  .page-about .ab-role__body {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-tl__item {
    padding-left: 204px;
  }
  .page-about .ab-tl__item::before {
    left: 168px;
  }
  .page-about .ab-tl__item::after {
    left: 172px;
  }
  .page-about .ab-tl__axis {
    position: absolute;
    left: 0;
    top: 2px;
    width: 146px;
    margin-bottom: 0;
    text-align: right;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(240px, .72fr);
    gap: clamp(36px, 4.5vw, 64px);
  }
  .page-about .ab-eco {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-charts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-scale__tick,
  .page-about .ab-flow__item,
  .page-about .ab-eco__tag,
  .page-about .ab-link {
    transition: none;
  }
}