.page-about {
  --about-gap: clamp(24px, 4vw, 56px);
  --about-pad: clamp(56px, 8vw, 104px);
  color: var(--paper);
  background: var(--bg-0);
  overflow-x: clip;
}

.page-about .content-shell {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: 8px 24px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(143, 163, 184, 0.5);
}

.page-about .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--gold);
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(16px, 3vw, 30px) var(--about-pad);
  background:
    radial-gradient(110% 78% at 4% -12%, rgba(27, 127, 168, 0.32), transparent 62%),
    radial-gradient(88% 66% at 102% 4%, rgba(242, 106, 46, 0.2), transparent 66%),
    linear-gradient(178deg, var(--bg-1) 0%, #080b18 54%, var(--bg-0) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(118deg, transparent 55%, rgba(201, 151, 74, 0.14) 55.1%, transparent 56%),
    repeating-linear-gradient(90deg, rgba(143, 163, 184, 0.06) 0 1px, transparent 1px 76px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
}

.page-about .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__note {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 22px;
}

.page-about .about-hero__note .eyebrow {
  flex: 0 0 100%;
  margin: 0;
}

.page-about .about-hero__stat {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .about-hero__stat .mono {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-hero__lead h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.4vw, 3.9rem);
  line-height: 1.14;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

.page-about .about-hero__accent {
  display: block;
  background: linear-gradient(96deg, var(--sunset) 0%, var(--gold) 58%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero .lede {
  max-width: 40em;
  margin: 0 0 26px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--paper-dim);
}

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

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(27, 127, 168, 0.22), rgba(5, 7, 13, 0.9));
  box-shadow: 0 30px 70px -50px rgba(95, 211, 232, 0.6);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(14, 90, 120, 0.24), rgba(5, 7, 13, 0.9));
}

.page-about .media-frame__caption {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 起源 ---------- */
.page-about .about-origin {
  background: linear-gradient(180deg, transparent, rgba(11, 16, 38, 0.6) 40%, transparent);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-note {
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-body .section-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-body > p {
  max-width: 38em;
  margin: 0 0 1.1em;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-about .about-quote {
  margin: 30px 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--gold);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.5vw, 1.6rem);
  line-height: 1.62;
  letter-spacing: 0.01em;
  color: var(--paper);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background:
    radial-gradient(90% 60% at 88% 0%, rgba(242, 106, 46, 0.1), transparent 70%),
    linear-gradient(180deg, rgba(5, 7, 13, 0.6), rgba(11, 16, 38, 0.72), rgba(5, 7, 13, 0.6));
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-timeline__rail .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-years {
  display: flex;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-years__link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  white-space: nowrap;
  color: var(--paper-dim);
  text-decoration: none;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  border-color: var(--line-strong);
  background: rgba(201, 151, 74, 0.1);
  color: var(--gold);
}

.page-about .about-years__num {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-timeline__track {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-about .about-timeline__media {
  margin: 0 0 18px;
}

.page-about .about-era {
  position: relative;
  padding: 20px 0 24px 26px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-era::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: -4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 151, 74, 0.85), rgba(201, 151, 74, 0.08));
}

.page-about .about-era:last-child::before {
  bottom: 60%;
}

.page-about .about-era::after {
  content: "";
  position: absolute;
  left: -4px;
  top: 27px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sunset);
  box-shadow: 0 0 0 4px rgba(242, 106, 46, 0.16);
}

.page-about .about-era__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-era__title {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-era__text {
  max-width: 38em;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  max-width: 44em;
  margin-bottom: 30px;
}

.page-about .about-team__head .section-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-team__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .about-team__cards {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  position: relative;
  padding: 20px 18px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(11, 16, 38, 0.94), rgba(5, 7, 13, 0.86));
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 20px 42px -26px rgba(242, 106, 46, 0.75);
}

.page-about .team-card__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-about .team-card__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .team-card__count {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.03em;
  color: var(--sunset);
}

.page-about .team-card__duty {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .team-card__more {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.42s var(--ease);
}

.page-about .team-card__more > div {
  overflow: hidden;
}

.page-about .team-card:hover .team-card__more,
.page-about .team-card:focus-within .team-card__more {
  grid-template-rows: 1fr;
}

.page-about .team-card__more-text {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-team__media {
  margin-top: 24px;
}

/* ---------- 内容治理 ---------- */
.page-about .about-govern {
  background: linear-gradient(180deg, transparent, rgba(14, 90, 120, 0.14) 50%, transparent);
}

.page-about .about-govern__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-govern__list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-govern__item {
  padding: 16px 16px 16px 18px;
  border-left: 2px solid rgba(201, 151, 74, 0.55);
  background: linear-gradient(90deg, rgba(201, 151, 74, 0.11), transparent 72%);
}

.page-about .about-govern__item h3 {
  margin: 0 0 7px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-govern__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 运营数据 ---------- */
.page-about .about-reach__head {
  max-width: 46em;
  margin-bottom: 28px;
}

.page-about .about-reach__head .section-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-reach__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-dim);
}

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

.page-about .about-stat {
  padding: 18px 16px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 100% at 0% 0%, rgba(27, 127, 168, 0.2), transparent 70%),
    linear-gradient(160deg, rgba(11, 16, 38, 0.9), rgba(5, 7, 13, 0.9));
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.4vw, 31px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--sunset);
}

.page-about .about-stat__unit {
  font-size: 0.5em;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-left: 3px;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-next__body .section-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-next__list {
  display: grid;
  gap: 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__mark {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .about-next__title {
  margin: 0 0 7px;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-next__text p {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .about-cta {
  margin-top: 30px;
  padding: clamp(24px, 4.5vw, 40px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(120% 130% at 10% 0%, rgba(242, 106, 46, 0.24), transparent 62%),
    linear-gradient(140deg, rgba(11, 16, 38, 0.96), rgba(5, 7, 13, 0.96));
}

.page-about .about-cta__text {
  margin: 0 0 20px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

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

/* ---------- 滚动显现 ---------- */
.page-about [data-reveal] {
  transition: opacity 0.62s var(--ease), transform 0.62s var(--ease);
}

.has-js .page-about [data-reveal]:not(.is-visible) {
  opacity: 0;
  transform: translateY(16px);
}

/* ---------- 平板 ---------- */
@media (min-width: 680px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    column-gap: var(--about-gap);
    row-gap: clamp(26px, 3.4vw, 40px);
    align-items: start;
  }

  .page-about .about-hero__note {
    grid-column: 1;
    grid-row: 1;
    flex-direction: column;
    gap: 12px;
    padding-left: 18px;
    border-left: 1px solid var(--line);
  }

  .page-about .about-hero__note .eyebrow {
    flex: initial;
    margin-bottom: 4px;
  }

  .page-about .about-hero__lead {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-hero__media {
    grid-column: 2;
    grid-row: 2;
  }

  .page-about .about-origin__grid,
  .page-about .about-timeline__grid,
  .page-about .about-govern__grid,
  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    column-gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-years {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    overflow: visible;
  }

  .page-about .about-years__link {
    width: 100%;
    border-radius: var(--radius-sm);
    justify-content: flex-start;
    padding: 8px 12px;
  }

  .page-about .about-era {
    padding-left: 32px;
  }

  .page-about .about-era::before {
    top: 30px;
  }

  .page-about .about-era::after {
    left: -4px;
    top: 31px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .has-js .page-about [data-reveal]:not(.is-visible) {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .team-card,
  .page-about .team-card__more,
  .page-about .about-years__link {
    transition: none;
  }
}
<<<END>>>