.page-about {
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

.page-about .ab-wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 52px) 0 44px;
  background-color: var(--ink-950);
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 64, 92, 0.55) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(180deg, rgba(30, 64, 92, 0.4) 0 1px, transparent 1px 88px),
    radial-gradient(90% 72% at 86% -6%, rgba(45, 226, 230, 0.16), transparent 62%),
    radial-gradient(72% 60% at 0% 104%, rgba(142, 124, 195, 0.13), transparent 60%);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .ab-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-about .ab-crumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .ab-crumb a:hover {
  text-decoration: underline;
}

.page-about .ab-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .ab-hero__title {
  margin: 0 0 18px;
  font-size: clamp(27px, 5.2vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 800;
  max-width: 15em;
}

.page-about .ab-hero__text {
  margin: 0 0 26px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--gray);
}

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

.page-about .ab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-btn--solid {
  background: var(--gold);
  color: var(--ink-950);
}

.page-about .ab-btn--solid:hover {
  background: var(--gold-soft);
}

.page-about .ab-btn--ghost {
  border-color: var(--line);
  color: var(--cyan-soft);
}

.page-about .ab-btn--ghost:hover {
  border-color: var(--cyan);
  background: rgba(45, 226, 230, 0.09);
  color: var(--paper);
}

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

.page-about .ab-tile {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: rgba(12, 34, 56, 0.86);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

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

.page-about .ab-tile__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

.page-about .ab-tile__v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .ab-tile__v--sm {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  word-break: break-all;
}

.page-about .ab-tile__u {
  margin-left: 4px;
  font-size: 15px;
  color: var(--gold-soft);
}

/* ---------- 数据带 ---------- */
.page-about .ab-stats {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-stats__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: var(--maxw);
  margin: 0 auto;
}

.page-about .ab-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 16px;
  border-left: 1px solid var(--line);
}

.page-about .ab-stats__item:first-child {
  border-left: 0;
}

.page-about .ab-stats__item:nth-child(3) {
  border-left: 0;
}

.page-about .ab-stats__item:nth-child(n + 3) {
  border-top: 1px solid var(--line);
}

.page-about .ab-stats__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1;
  letter-spacing: 0.03em;
  color: var(--gold);
}

.page-about .ab-stats__unit {
  margin-left: 2px;
  font-size: 0.55em;
  color: var(--gold-soft);
}

.page-about .ab-stats__lab {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--gray);
}

/* ---------- 主体布局 ---------- */
.page-about .ab-layout {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter) 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-rail {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 0 calc(var(--gutter) * -1);
  padding: 12px var(--gutter);
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

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

.page-about .ab-rail__title {
  display: none;
}

.page-about .ab-rail__link {
  flex: 0 0 auto;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  text-decoration: none;
  color: var(--gray);
  border: 1px solid var(--line);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .ab-rail__link:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-about .ab-rail__link[aria-current="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-950);
}

.page-about .ab-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .ab-sec {
  padding: 44px 0 8px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 66px);
}

.page-about .ab-rail + .ab-flow > .ab-sec:first-child {
  border-top: 0;
}

.page-about .ab-sec__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .ab-sec__title {
  margin: 0 0 14px;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.page-about .ab-sec__lede {
  margin: 0 0 8px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .ab-sub {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan-soft);
}

.page-about .ab-text {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .ab-cols2 {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

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

.page-about .ab-steps li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .ab-steps__n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-950);
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.page-about .ab-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--violet);
  transform: rotate(45deg);
}

/* ---------- 图片 ---------- */
.page-about .ab-figure {
  margin: 26px 0 0;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--ink-800);
  object-fit: cover;
}

.page-about .ab-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--gray);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-tl {
  position: relative;
  margin-top: 30px;
  padding-left: 26px;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--line) 60%, transparent);
}

.page-about .ab-node {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .ab-node__year {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .ab-node__title {
  margin: 4px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------- 内容体系 ---------- */
.page-about .ab-sys {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-sys__item {
  padding: 22px 20px;
  background: var(--ink-800);
  border-left: 2px solid var(--cyan);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .ab-sys__name {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-sys__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .ab-cover {
  display: grid;
  gap: 14px;
  margin-top: 26px;
  padding: 24px 20px;
  background: linear-gradient(120deg, rgba(142, 124, 195, 0.16), rgba(12, 34, 56, 0.9) 62%);
  border: 1px solid var(--line);
}

.page-about .ab-cover__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 42px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .ab-cover__t {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-cover__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 团队四象限 ---------- */
.page-about .ab-quad {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-quad__cell {
  padding: 20px 18px;
  background: var(--ink-800);
  border-top: 2px solid var(--violet);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .ab-quad__cell:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .ab-quad__cell:nth-child(3) {
  border-top-color: var(--gold);
}

.page-about .ab-quad__cell:nth-child(4) {
  border-top-color: var(--cyan-soft);
}

.page-about .ab-quad__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-quad__desc {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .ab-quad__cell .vx-disclosure__trigger {
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: none;
  border: 0;
  border-bottom: 1px dashed var(--line);
  cursor: pointer;
}

.page-about .ab-quad__cell .vx-disclosure__trigger:hover {
  border-bottom-color: var(--cyan);
}

.page-about .ab-quad__cell .vx-drawer__body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .ab-quad__cell .vx-drawer__body p {
  margin: 0;
}

/* ---------- 兼容与协作 ---------- */
.page-about .ab-rows {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.page-about .ab-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-row__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .ab-row__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------- 荣誉与透明度 ---------- */
.page-about .ab-honors {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-about .ab-honor {
  padding: 20px 16px;
  background: var(--ink-800);
  border-top: 2px solid var(--gold);
}

.page-about .ab-honor__n {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 27px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .ab-honor__t {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 行动区 ---------- */
.page-about .ab-cta {
  margin-top: 52px;
  padding: 30px 22px;
  background: linear-gradient(135deg, var(--ink-800), var(--ink-950));
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .ab-cta__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.page-about .ab-cta__text {
  margin: 0 0 20px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

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

.page-about .ab-cta__meta {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--gray);
}

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

  .page-about .ab-cover {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: center;
    column-gap: 24px;
  }

  .page-about .ab-cover__num {
    font-size: 56px;
  }
}

@media (min-width: 760px) {
  .page-about .ab-stats__row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-stats__item:nth-child(3) {
    border-left: 1px solid var(--line);
  }

  .page-about .ab-stats__item:nth-child(n + 3) {
    border-top: 0;
  }

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

  .page-about .ab-row {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-about .ab-cols2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .ab-sys {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 920px) {
  .page-about .ab-hero {
    padding-top: calc(var(--header-h) + 72px);
    padding-bottom: 64px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .ab-hero__side {
    margin-top: 8px;
  }
}

@media (min-width: 980px) {
  .page-about .ab-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: 52px;
    align-items: start;
    padding-bottom: 80px;
  }

  .page-about .ab-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    display: block;
    overflow: visible;
    margin: 0;
    padding: 34px 0 0;
    background: transparent;
    border-bottom: 0;
  }

  .page-about .ab-rail::after {
    content: "";
    display: block;
    width: 28px;
    height: 2px;
    margin: 14px 0 0 14px;
    background: var(--gold);
  }

  .page-about .ab-rail__title {
    display: block;
    margin: 0 0 12px;
    padding-left: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--gray);
  }

  .page-about .ab-rail__link {
    display: block;
    padding: 8px 0 8px 14px;
    margin-bottom: 2px;
    border: 0;
    border-left: 2px solid var(--line);
    background: transparent;
    color: var(--gray);
  }

  .page-about .ab-rail__link:hover {
    color: var(--paper);
    border-left-color: var(--cyan);
  }

  .page-about .ab-rail__link[aria-current="true"] {
    background: transparent;
    color: var(--cyan);
    border-left-color: var(--cyan);
  }

  .page-about .ab-rail + .ab-flow > .ab-sec:first-child {
    padding-top: 34px;
  }

  .page-about .ab-sec {
    padding-top: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-btn,
  .page-about .ab-rail__link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>