.page-about {
  --ab-line: rgba(159, 176, 170, 0.18);
  --ab-slab: linear-gradient(160deg, rgba(18, 51, 43, 0.92), rgba(10, 13, 12, 0.88));
  display: block;
  overflow-x: clip;
  background:
    radial-gradient(900px 520px at 6% -8%, rgba(43, 245, 208, 0.10), transparent 62%),
    var(--vd-ink);
  color: var(--vd-paper);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(36px, 6vw, 68px);
}

.page-about .ab-hero__wash {
  position: absolute;
  inset: 0 0 auto 0;
  height: clamp(320px, 62vw, 560px);
  pointer-events: none;
  background:
    linear-gradient(128deg, rgba(18, 51, 43, 0.95) 0%, rgba(6, 26, 21, 0.2) 58%, transparent 82%),
    radial-gradient(520px 340px at 84% 12%, rgba(255, 107, 44, 0.18), transparent 70%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 0 100%);
}

.page-about .ab-hero__inner {
  position: relative;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 54px);
}

.page-about .ab-hero__title {
  margin: 16px 0 0;
  font-size: clamp(36px, 7.2vw, 80px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 900;
  transform: scaleX(0.94);
  transform-origin: left center;
}

.page-about .ab-hero__title span {
  display: block;
}

.page-about .ab-hero__title-accent {
  color: var(--vd-cyan);
}

.page-about .ab-hero__lede {
  margin-top: clamp(18px, 3vw, 26px);
  max-width: 62ch;
  color: var(--vd-mist);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .ab-figure {
  margin: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--ab-line);
  border-radius: var(--vd-radius-m);
  overflow: hidden;
  background: var(--ab-line);
  box-shadow: var(--vd-shadow);
}

.page-about .ab-figure__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 20px;
  background: var(--ab-slab);
}

.page-about .ab-figure__key {
  font-family: var(--vd-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vd-mist);
}

.page-about .ab-figure__val {
  margin: 0;
  font-family: var(--vd-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--vd-cyan);
}

.page-about .ab-figure__unit {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--vd-mist);
}

.page-about .ab-jump {
  display: flex;
  gap: 8px;
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 16px;
  border-top: 1px dashed var(--ab-line);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .ab-jump::-webkit-scrollbar {
  display: none;
}

.page-about .ab-jump .vd-chip {
  flex: 0 0 auto;
  text-decoration: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-section {
  padding: clamp(52px, 8vw, 112px) 0;
}

.page-about .ab-section--coal {
  background: var(--vd-coal);
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-head {
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .ab-head__title {
  margin: 14px 0 0;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  max-width: 22ch;
}

.page-about .ab-head__note {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--vd-mist);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 60px);
}

.page-about .ab-split__aside,
.page-about .ab-split__main {
  min-width: 0;
}

.page-about .ab-lead {
  margin: 0 0 20px;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.7;
  color: var(--vd-paper);
}

.page-about .ab-text {
  margin: 0 0 16px;
  max-width: 64ch;
  color: var(--vd-mist);
  line-height: 1.75;
}

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

/* ---------- 起点三问 ---------- */
.page-about .ab-pains {
  list-style: none;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-pains__item {
  position: relative;
  padding: 20px 20px 18px 54px;
  border: 1px solid var(--ab-line);
  border-radius: var(--vd-radius-m);
  background: linear-gradient(150deg, rgba(18, 51, 43, 0.62), rgba(10, 13, 12, 0.55));
}

.page-about .ab-pains__num {
  position: absolute;
  left: 18px;
  top: 22px;
  font-family: var(--vd-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--vd-orange);
  letter-spacing: 0.08em;
}

.page-about .ab-pains__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--vd-paper);
}

.page-about .ab-pains__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--vd-mist);
}

/* ---------- 时间线 ---------- */
.page-about .ab-tl-visual {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .ab-tl-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 600;
  object-fit: cover;
  border-radius: var(--vd-radius-l);
  border: 1px solid var(--ab-line);
}

.page-about .ab-tl-visual figcaption {
  margin-top: 10px;
  font-family: var(--vd-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vd-mist);
}

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

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(22px, 4vw, 32px) 0 clamp(22px, 4vw, 32px) 24px;
  border-top: 1px dashed var(--ab-line);
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(34px, 5.4vw, 46px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--vd-cyan);
  box-shadow: 0 0 0 4px rgba(43, 245, 208, 0.12);
}

.page-about .ab-tl__item.is-now::before {
  background: var(--vd-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 44, 0.16);
}

.page-about .ab-tl__year {
  margin: 0;
  font-family: var(--vd-mono);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 58px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--vd-paper);
}

.page-about .ab-tl__item.is-now .ab-tl__year {
  color: var(--vd-cyan);
}

.page-about .ab-tl__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.3vw, 20px);
  font-weight: 700;
  color: var(--vd-paper);
}

.page-about .ab-tl__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--vd-mist);
}

.page-about .ab-tl__more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-tl__more > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  cursor: pointer;
  list-style: none;
  font-family: var(--vd-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vd-cyan);
}

.page-about .ab-tl__more > summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-tl__more > summary::after {
  content: "+";
  font-size: 14px;
  line-height: 1;
}

.page-about .ab-tl__more[open] > summary::after {
  content: "−";
}

.page-about .ab-tl__more > p {
  margin-top: 8px;
  font-size: 0.9rem;
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

.page-about .ab-team__copy,
.page-about .ab-team__shot {
  min-width: 0;
}

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

.page-about .ab-team__shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--vd-radius-l);
  border: 1px solid var(--ab-line);
}

.page-about .ab-team__shot figcaption {
  margin-top: 10px;
  font-family: var(--vd-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vd-mist);
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-flow__item {
  padding: 22px 20px 20px;
  border: 1px solid var(--ab-line);
  border-radius: var(--vd-radius-m);
  background: linear-gradient(160deg, rgba(18, 51, 43, 0.86), rgba(10, 13, 12, 0.8));
}

.page-about .ab-flow__num {
  display: block;
  font-family: var(--vd-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--vd-violet);
  margin-bottom: 10px;
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--vd-paper);
}

.page-about .ab-flow__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--vd-mist);
}

/* ---------- V3.1 ---------- */
.page-about .ab-v31 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.5vw, 52px);
}

.page-about .ab-v31__copy,
.page-about .ab-v31__shot {
  min-width: 0;
}

.page-about .ab-v31__keys {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  border-top: 1px dashed var(--ab-line);
}

.page-about .ab-v31__keys li {
  position: relative;
  padding: 14px 0 14px 22px;
  border-bottom: 1px dashed var(--ab-line);
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--vd-mist);
}

.page-about .ab-v31__keys li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 10px;
  height: 2px;
  background: var(--vd-cyan);
}

.page-about .ab-v31__keys strong {
  color: var(--vd-paper);
  font-weight: 700;
}

.page-about .ab-v31__copy .vd-btn {
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .ab-v31__shot {
  margin: 0;
}

.page-about .ab-v31__shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  border-radius: var(--vd-radius-l);
  border: 1px solid var(--ab-line);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .ab-rail__card {
  flex: 0 0 min(78vw, 320px);
  scroll-snap-align: start;
  padding: 22px 20px;
  border: 1px solid var(--ab-line);
  border-radius: var(--vd-radius-m);
  background: linear-gradient(150deg, rgba(18, 51, 43, 0.5), rgba(10, 13, 12, 0.7));
}

.page-about .ab-rail__tag {
  margin: 0 0 12px;
  font-family: var(--vd-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vd-orange);
}

.page-about .ab-rail__title {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--vd-paper);
}

.page-about .ab-rail__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--vd-mist);
}

.page-about .ab-honor {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(22px, 3.5vw, 32px);
  border-radius: var(--vd-radius-l);
  border: 1px solid var(--vd-line-strong);
  background:
    linear-gradient(135deg, rgba(142, 107, 255, 0.16), transparent 58%),
    linear-gradient(160deg, rgba(18, 51, 43, 0.9), rgba(10, 13, 12, 0.9));
}

.page-about .ab-honor__year {
  font-family: var(--vd-mono);
  font-weight: 700;
  font-size: clamp(38px, 7vw, 64px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--vd-violet);
}

.page-about .ab-honor__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  color: var(--vd-paper);
}

.page-about .ab-honor__body p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--vd-mist);
}

/* ---------- 规模指标 ---------- */
.page-about .ab-metrics {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: var(--vd-radius-m);
  overflow: hidden;
}

.page-about .ab-metrics__cell {
  padding: 20px 18px;
  background: linear-gradient(160deg, rgba(18, 51, 43, 0.88), rgba(10, 13, 12, 0.9));
}

.page-about .ab-metrics__key {
  font-family: var(--vd-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vd-mist);
}

.page-about .ab-metrics__val {
  margin: 8px 0 0;
  font-family: var(--vd-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  color: var(--vd-cyan);
}

.page-about .ab-metrics__unit {
  font-size: 0.45em;
  margin-left: 3px;
  color: var(--vd-mist);
}

/* ---------- 结尾行动 ---------- */
.page-about .ab-cta {
  margin-top: clamp(30px, 5vw, 52px);
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--vd-radius-l);
  border: 1px solid var(--ab-line);
  background:
    radial-gradient(420px 220px at 92% 0%, rgba(255, 107, 44, 0.2), transparent 66%),
    linear-gradient(150deg, rgba(18, 51, 43, 0.9), rgba(6, 26, 21, 0.95));
}

.page-about .ab-cta__text {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.65;
  color: var(--vd-paper);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.75fr);
    align-items: end;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .ab-tl__item {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    padding-left: 0;
  }

  .page-about .ab-tl__item::before {
    display: none;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .ab-flow {
    grid-column: 1 / -1;
  }

  .page-about .ab-v31 {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }

  .page-about .ab-honor {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: center;
    gap: clamp(20px, 3vw, 36px);
  }

  .page-about .ab-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .ab-rail__card {
    flex: 0 0 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
<<<END>>>