.page-about {
  padding-top: var(--header-h);
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(18px, 3vw, 32px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(110% 70% at 88% 4%, rgba(53, 224, 208, 0.12), transparent 62%),
    radial-gradient(90% 60% at 4% 0%, rgba(31, 122, 77, 0.18), transparent 58%),
    linear-gradient(180deg, var(--midnight) 0%, var(--ink) 78%);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, rgba(232, 241, 255, 0.05) 1px, transparent 1px);
  background-size: 12.5% 100%;
}

.page-about .ab-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .breadcrumb {
  margin: 0 0 clamp(26px, 4vw, 46px);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 7.6vw, 78px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--white);
}

.page-about .ab-hero__accent {
  color: var(--cyan);
}

.page-about .ab-hero__lede {
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.95;
  color: rgba(232, 241, 255, 0.76);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-hero__panel {
  padding: 22px 20px 8px;
  border: 1px solid rgba(232, 241, 255, 0.12);
  background: rgba(14, 24, 48, 0.55);
  box-shadow: 0 20px 60px -40px rgba(0, 0, 0, 0.9);
}

.page-about .ab-hero__panel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .ab-toc {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .ab-toc__item + .ab-toc__item {
  border-top: 1px solid rgba(232, 241, 255, 0.07);
}

.page-about .ab-toc__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  text-decoration: none;
  color: rgba(232, 241, 255, 0.72);
  font-size: 14.5px;
  line-height: 1.5;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-about .ab-toc__link:hover,
.page-about .ab-toc__link:focus-visible {
  color: var(--white);
  padding-left: 6px;
}

.page-about .ab-toc__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .ab-toc__link:hover .ab-toc__num,
.page-about .ab-toc__link:focus-visible .ab-toc__num {
  color: var(--amber);
}

/* ---------- 首屏数字条 ---------- */
.page-about .ab-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(34px, 5vw, 62px) 0 0;
  padding: 0;
  background: rgba(232, 241, 255, 0.09);
  border: 1px solid rgba(232, 241, 255, 0.09);
}

.page-about .ab-figure {
  background: rgba(7, 11, 20, 0.86);
  padding: 18px 16px;
}

.page-about .ab-figure__key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .ab-figure__val {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1;
  color: var(--amber);
  font-family: var(--font-mono);
}

.page-about .ab-figure__unit {
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(232, 241, 255, 0.66);
}

/* ---------- 通用区块骨架 ---------- */
.page-about .ab-block {
  position: relative;
  padding: clamp(52px, 8vw, 112px) 0;
  border-top: 1px solid rgba(232, 241, 255, 0.07);
}

.page-about .ab-block__inner {
  display: grid;
  gap: 24px;
}

.page-about .ab-aside {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .ab-aside__idx {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .ab-aside__label {
  font-size: 11.5px;
  letter-spacing: 0.26em;
  color: var(--mist);
}

.page-about .ab-block__title {
  margin: 0 0 20px;
  font-size: clamp(25px, 4.2vw, 42px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .ab-prose p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.95;
  color: rgba(232, 241, 255, 0.76);
}

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

.page-about .ab-prose--tight p {
  margin-top: 26px;
}

/* ---------- 引用 ---------- */
.page-about .ab-quote {
  margin: 30px 0 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--pitch);
  font-size: clamp(15.5px, 2vw, 18px);
  line-height: 1.8;
  color: var(--white);
}

.page-about .ab-quote cite {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  font-style: normal;
  color: var(--mist);
}

/* ---------- 数据体系 ---------- */
.page-about .ab-data {
  display: grid;
  gap: 28px;
}

.page-about .ab-statlist {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid rgba(232, 241, 255, 0.09);
}

.page-about .ab-statlist__row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(232, 241, 255, 0.07);
}

.page-about .ab-statlist__num {
  min-width: 2.2em;
  font-size: 22px;
  color: var(--amber);
}

.page-about .ab-statlist__txt {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(232, 241, 255, 0.7);
}

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

.page-about .ab-data__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid rgba(232, 241, 255, 0.12);
  filter: saturate(0.9);
}

.page-about .ab-data__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: 26px;
}

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

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid rgba(232, 241, 255, 0.1);
}

.page-about .ab-rhythm {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  background: rgba(232, 241, 255, 0.08);
  border: 1px solid rgba(232, 241, 255, 0.08);
}

.page-about .ab-rhythm__item {
  background: rgba(14, 24, 48, 0.62);
  padding: 16px 16px 18px;
  transition: background 0.2s var(--ease);
}

.page-about .ab-rhythm__item:hover {
  background: rgba(20, 42, 74, 0.86);
}

.page-about .ab-rhythm__key {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(53, 224, 208, 0.28);
}

.page-about .ab-rhythm__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(232, 241, 255, 0.72);
}

/* ---------- 版本演进 ---------- */
.page-about .ab-block--versions {
  overflow: hidden;
}

.page-about .ab-versions-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .ab-versions-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
}

.page-about .ab-versions-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--ink) 0%, rgba(7, 11, 20, 0.72) 55%, var(--ink) 100%);
}

.page-about .ab-block--versions > .container {
  position: relative;
  z-index: 1;
}

.page-about .ab-timeline {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .ab-timeline__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 0 0 34px 26px;
  border-left: 1px solid rgba(232, 241, 255, 0.14);
}

.page-about .ab-timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
}

.page-about .ab-timeline__year {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .ab-timeline__tag {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .ab-timeline__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(232, 241, 255, 0.74);
}

/* ---------- 站内入口 ---------- */
.page-about .ab-links {
  display: grid;
  gap: 1px;
  margin-top: 30px;
  background: rgba(232, 241, 255, 0.08);
  border: 1px solid rgba(232, 241, 255, 0.08);
}

.page-about .ab-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(14, 24, 48, 0.6);
  text-decoration: none;
  font-size: 14.5px;
  color: rgba(232, 241, 255, 0.82);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  background: rgba(20, 42, 74, 0.9);
  color: var(--white);
}

.page-about .ab-link__arrow {
  color: var(--cyan);
  font-family: var(--font-mono);
}

/* ---------- 合作与保障 ---------- */
.page-about .ab-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(232, 241, 255, 0.08);
  border: 1px solid rgba(232, 241, 255, 0.08);
}

.page-about .ab-partners__card {
  background: rgba(14, 24, 48, 0.66);
  padding: 20px 18px 22px;
}

.page-about .ab-partners__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .ab-partners__num {
  margin: 12px 0 10px;
  font-size: clamp(24px, 3.6vw, 32px);
  line-height: 1;
  color: var(--amber);
  font-family: var(--font-mono);
}

.page-about .ab-partners__txt {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(232, 241, 255, 0.7);
}

.page-about .ab-endnote {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid rgba(232, 241, 255, 0.1);
}

.page-about .ab-endnote__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .ab-rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 920px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: start;
    gap: clamp(40px, 6vw, 88px);
  }

  .page-about .ab-hero__panel {
    margin-top: clamp(12px, 3vw, 42px);
  }

  .page-about .ab-block__inner {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
  }

  .page-about .ab-aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .ab-aside__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-about .ab-data {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: clamp(28px, 4vw, 48px);
    align-items: start;
  }

  .page-about .ab-data__media {
    margin-top: 8px;
    margin-right: clamp(-24px, -1.5vw, 0px);
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 48px);
    align-items: start;
  }

  .page-about .ab-team__media {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .ab-timeline__item {
    grid-template-columns: 118px minmax(0, 1fr);
    column-gap: 28px;
    padding-left: 34px;
  }

  .page-about .ab-timeline__year {
    grid-row: span 2;
  }

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

@media (min-width: 1180px) {
  .page-about .ab-hero {
    padding-bottom: clamp(56px, 6vw, 92px);
  }

  .page-about .ab-toc__link {
    padding: 14px 0;
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-toc__link,
  .page-about .ab-link,
  .page-about .ab-rhythm__item {
    transition: none;
  }
}
<<<END>>>