.page-about {
  --ab-rail-w: 224px;
  --ab-ink-deep: #07111F;
  --ab-paper-line: rgba(11, 24, 38, .16);
  --ab-paper-text: #22303F;
  background: var(--m6-ink);
  color: var(--m6-white);
  font-family: var(--m6-font-sans);
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--m6-header-h) + 32px);
  padding-bottom: 44px;
  border-bottom: 1px solid var(--m6-grid);
  background:
    radial-gradient(112% 82% at 84% -12%, rgba(34, 211, 238, .22), transparent 62%),
    radial-gradient(88% 70% at 4% 110%, rgba(255, 90, 54, .16), transparent 60%),
    linear-gradient(180deg, #07111F 0%, #0A1728 100%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(30, 51, 80, .7) 1px, transparent 1px);
  background-size: 68px 100%;
  opacity: .28;
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .ab-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--m6-steel);
  margin-bottom: 18px;
}

.page-about .ab-crumb a {
  color: var(--m6-cyan);
  text-decoration: none;
}

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

.page-about .ab-eyebrow {
  color: var(--m6-lime);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

.page-about .ab-h1 {
  font-family: var(--m6-font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(28px, 7.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--m6-white);
  text-shadow: 0 0 28px rgba(34, 211, 238, .22);
  margin: 0 0 16px;
}

.page-about .ab-lead {
  max-width: 56ch;
  font-size: clamp(15px, 3.7vw, 17px);
  line-height: 1.8;
  color: rgba(234, 244, 255, .82);
  margin: 0 0 24px;
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  border-top: 1px solid var(--m6-grid);
  padding-top: 18px;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 10px;
  border-left: 2px solid var(--m6-cyan);
  min-width: 0;
}

.page-about .ab-stat:nth-child(2) {
  border-left-color: var(--m6-lime);
}

.page-about .ab-stat:nth-child(3) {
  border-left-color: var(--m6-orange);
}

.page-about .ab-stat__num {
  font-family: var(--m6-font-mono);
  font-weight: 700;
  font-size: clamp(22px, 5.6vw, 34px);
  line-height: 1;
  color: var(--m6-white);
  letter-spacing: -.02em;
}

.page-about .ab-stat__unit {
  font-size: .55em;
  margin-left: 2px;
  color: var(--m6-cyan);
}

.page-about .ab-stat:first-child .ab-stat__num {
  color: var(--m6-cyan);
}

.page-about .ab-stat__label {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--m6-steel);
  line-height: 1.4;
}

.page-about .ab-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(34, 211, 238, .3);
  filter: saturate(1.06) contrast(1.03);
}

.page-about .ab-hero__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--m6-steel);
  line-height: 1.6;
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-top: 34px;
  padding-bottom: 64px;
}

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

.page-about .ab-toc {
  border: 1px solid var(--m6-grid);
  background: rgba(13, 27, 46, .72);
  padding: 14px 12px;
}

.page-about .ab-toc__head {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--m6-steel);
  text-transform: uppercase;
}

.page-about .ab-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-toc__list li {
  flex: 0 0 auto;
}

.page-about .ab-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 10px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--m6-steel);
  text-decoration: none;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  white-space: nowrap;
  transition: color .18s var(--m6-ease), border-color .18s var(--m6-ease);
}

.page-about .ab-toc__mark {
  font-family: var(--m6-font-mono);
  font-size: 11px;
  color: var(--m6-cyan);
  letter-spacing: .04em;
}

.page-about .ab-toc__list a:hover,
.page-about .ab-toc__list a:focus-visible {
  color: var(--m6-white);
  border-color: var(--m6-grid);
}

.page-about .ab-toc__list a[aria-current="location"] {
  color: var(--m6-white);
  border-left-color: var(--m6-orange);
  background: rgba(255, 90, 54, .08);
}

.page-about .ab-stream {
  min-width: 0;
  display: grid;
  gap: 22px;
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: 24px 18px 28px;
  scroll-margin-top: calc(var(--m6-header-h) + 18px);
}

.page-about .ab-sec--ink {
  background: linear-gradient(158deg, #0D1B2E 0%, #0A1627 100%);
  border: 1px solid var(--m6-grid);
  border-top: 3px solid var(--m6-cyan);
  color: var(--m6-white);
}

.page-about .ab-sec--ink.ab-sec--signal {
  border-top-color: var(--m6-orange);
}

.page-about .ab-sec--paper {
  background: linear-gradient(178deg, #F5EDDF 0%, #EFE3CF 100%);
  border: 1px solid var(--ab-paper-line);
  border-top: 3px solid var(--m6-cyan);
  color: var(--ab-paper-text);
}

.page-about .ab-sec--paper::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 74px;
  height: 3px;
  background: var(--m6-orange);
}

.page-about .ab-sec__no {
  font-family: var(--m6-font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--m6-cyan);
  margin: 0 0 8px;
}

.page-about .ab-sec--paper .ab-sec__no {
  color: #0C7189;
}

.page-about .ab-h2 {
  font-family: var(--m6-font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(21px, 5vw, 31px);
  line-height: 1.22;
  letter-spacing: -.015em;
  margin: 0 0 12px;
  color: var(--m6-white);
}

.page-about .ab-sec--paper .ab-h2 {
  color: #07111F;
}

.page-about .ab-h3 {
  font-size: clamp(15.5px, 3.9vw, 18px);
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 6px;
  color: var(--m6-white);
}

.page-about .ab-sec--paper .ab-h3 {
  color: #0B1826;
}

.page-about .ab-prose p,
.page-about .ab-sec p {
  font-size: clamp(14.5px, 3.6vw, 16px);
  line-height: 1.8;
  margin: 0 0 12px;
  max-width: 64ch;
}

.page-about .ab-sec--ink .ab-prose p,
.page-about .ab-sec--ink .ab-sec__lead,
.page-about .ab-sec--ink .ab-timeline__item p,
.page-about .ab-sec--ink .ab-checks p {
  color: rgba(234, 244, 255, .78);
}

.page-about .ab-sec--paper .ab-prose p,
.page-about .ab-sec--paper .ab-sec__lead,
.page-about .ab-sec--paper .ab-roles p,
.page-about .ab-sec--paper .ab-eco p,
.page-about .ab-sec--paper .ab-award p {
  color: var(--ab-paper-text);
}

.page-about .ab-sec__lead {
  font-size: clamp(14.5px, 3.6vw, 16px);
  line-height: 1.8;
  margin: 0 0 18px;
  max-width: 64ch;
}

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

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid rgba(34, 211, 238, .38);
  display: grid;
  gap: 22px;
}

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

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--m6-cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, .18);
}

.page-about .ab-timeline__item:nth-child(2)::before {
  background: var(--m6-lime);
  box-shadow: 0 0 0 3px rgba(183, 243, 74, .18);
}

.page-about .ab-timeline__item--now::before {
  background: var(--m6-orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 54, .22);
}

.page-about .ab-timeline__stage {
  font-family: var(--m6-font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--m6-cyan);
  margin: 0 0 6px;
}

.page-about .ab-timeline__item--now .ab-timeline__stage {
  color: var(--m6-orange);
}

/* ---------- 图片 ---------- */
.page-about .ab-figure {
  margin: 22px 0 0;
  position: relative;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--m6-grid);
}

.page-about .ab-figure--team img {
  border-color: var(--ab-paper-line);
}

/* ---------- 团队数字条 ---------- */
.page-about .ab-numstrip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--m6-grid);
  border: 1px solid #0B1826;
  margin: 18px 0 20px;
}

.page-about .ab-numstrip__cell {
  background: #0D1B2E;
  padding: 14px 12px 15px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .ab-numstrip__cell--total {
  background: #12253D;
}

.page-about .ab-numstrip__num {
  font-family: var(--m6-font-mono);
  font-weight: 700;
  font-size: clamp(24px, 6.2vw, 34px);
  line-height: 1;
  color: var(--m6-cyan);
}

.page-about .ab-numstrip__cell:nth-child(2) .ab-numstrip__num {
  color: var(--m6-lime);
}

.page-about .ab-numstrip__cell:nth-child(3) .ab-numstrip__num {
  color: var(--m6-white);
}

.page-about .ab-numstrip__cell--total .ab-numstrip__num {
  color: var(--m6-orange);
}

.page-about .ab-numstrip__label {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--m6-steel);
}

/* ---------- 职能列表 ---------- */
.page-about .ab-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-paper-line);
  border: 1px solid var(--ab-paper-line);
}

.page-about .ab-roles li {
  background: #F5EDDF;
  padding: 14px 14px 15px;
}

.page-about .ab-roles p {
  font-size: 14.5px;
  line-height: 1.75;
  margin: 0;
}

/* ---------- 质量条目 ---------- */
.page-about .ab-checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-checks li {
  padding-left: 14px;
  border-left: 1px solid var(--m6-grid);
  position: relative;
}

.page-about .ab-checks li::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 4px;
  width: 1px;
  height: 16px;
  background: var(--m6-lime);
}

.page-about .ab-checks__key {
  display: inline-block;
  font-family: var(--m6-font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--m6-lime);
  margin-bottom: 5px;
}

.page-about .ab-checks p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-paper-line);
  border: 1px solid var(--ab-paper-line);
}

.page-about .ab-eco li {
  background: #F2E8D8;
  padding: 14px 14px 15px;
}

.page-about .ab-eco__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .14em;
  color: #0C7189;
  border: 1px solid rgba(12, 113, 137, .42);
  padding: 3px 8px;
  margin-bottom: 8px;
}

.page-about .ab-eco p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .ab-award {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--ab-paper-line);
}

.page-about .ab-award__year {
  font-family: var(--m6-font-mono);
  font-weight: 700;
  font-size: clamp(20px, 5vw, 26px);
  line-height: 1;
  color: #C43A1C;
  letter-spacing: -.02em;
}

.page-about .ab-award p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 覆盖 ---------- */
.page-about .ab-coverage {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 18px;
}

.page-about .ab-coverage__item {
  border: 1px solid var(--m6-grid);
  border-top: 2px solid var(--m6-cyan);
  padding: 12px 11px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(7, 17, 31, .55);
}

.page-about .ab-coverage__item:nth-child(3) {
  border-top-color: var(--m6-lime);
}

.page-about .ab-coverage__item:nth-child(4) {
  border-top-color: var(--m6-orange);
}

.page-about .ab-coverage__num {
  font-family: var(--m6-font-mono);
  font-weight: 700;
  font-size: clamp(22px, 5.8vw, 30px);
  line-height: 1;
  color: var(--m6-white);
}

.page-about .ab-coverage__unit {
  font-size: .55em;
  margin-left: 2px;
  color: var(--m6-cyan);
}

.page-about .ab-coverage__label {
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--m6-steel);
}

.page-about .ab-note {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--m6-steel);
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--m6-cyan);
}

/* ---------- 底部行动 ---------- */
.page-about .ab-cta {
  padding: 36px 0 52px;
  border-top: 1px solid var(--m6-grid);
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(255, 90, 54, .16), transparent 62%),
    linear-gradient(180deg, #0A1728 0%, #07111F 100%);
}

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

.page-about .ab-cta__title {
  font-family: var(--m6-font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(21px, 5.2vw, 30px);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--m6-white);
  margin: 0 0 10px;
}

.page-about .ab-cta__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 244, 255, .76);
  margin: 0;
  max-width: 58ch;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .ab-sec {
    padding: 28px 26px 32px;
  }

  .page-about .ab-numstrip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .ab-coverage {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-cta__actions {
    justify-content: flex-start;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-top: calc(var(--m6-header-h) + 52px);
    padding-bottom: 64px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .ab-hero__figure img {
    clip-path: polygon(0 0, 100% 0, 100% 93%, 0 100%);
  }

  .page-about .ab-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
    padding-top: 48px;
    padding-bottom: 84px;
  }

  .page-about .ab-rail {
    position: sticky;
    top: calc(var(--m6-header-h) + 26px);
  }

  .page-about .ab-toc__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
  }

  .page-about .ab-toc__list a {
    white-space: normal;
    border-left-width: 2px;
    border-left-color: transparent;
    padding: 8px 10px;
  }

  .page-about .ab-toc__list a[aria-current="location"] {
    border-left-color: var(--m6-orange);
  }

  .page-about .ab-stream {
    gap: 28px;
  }

  .page-about .ab-sec {
    padding: 34px 38px 40px;
  }

  .page-about .ab-sec--paper {
    padding-right: 46px;
  }

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

  .page-about .ab-checks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 26px;
  }

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

  .page-about .ab-cta {
    padding: 56px 0 76px;
  }

  .page-about .ab-cta__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
    align-items: end;
  }

  .page-about .ab-cta__actions {
    flex-direction: column;
    align-items: stretch;
    max-width: 260px;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --ab-rail-w: 248px;
  }

  .page-about .ab-body {
    gap: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-toc__list a {
    transition: none;
  }
}
<<<END>>>