.page-about {
  --about-track: rgba(10, 26, 43, .22);
  display: block;
  width: 100%;
  background: var(--ink-900);
  color: var(--paper-050);
  font-family: var(--font-sans);
  font-size: var(--fs-17);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about h2,
.page-about h3 {
  font-family: var(--font-serif);
  font-weight: 800;
  letter-spacing: -.02em;
}

.page-about .about-eyebrow {
  margin: 0 0 12px;
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--orange-500);
}

.page-about .about-h2 {
  margin: 0 0 20px;
  font-size: clamp(27px, 5.4vw, 44px);
  line-height: 1.16;
  color: var(--ink-900);
  max-width: 24ch;
}

.page-about .about-h2--paper {
  color: var(--paper-050);
}

.page-about .about-lead {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--ink-800);
  max-width: 46ch;
}

.page-about .about-lead--paper {
  color: var(--gray-200);
}

.page-about .about-link {
  color: var(--orange-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 87, 31, .5);
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}

.page-about .about-link:hover {
  color: var(--orange-300);
  border-bottom-color: var(--orange-300);
}

.page-about .media-frame {
  margin: 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-800);
}

.page-about .media-frame__caption {
  margin-top: 10px;
  font-size: var(--fs-12);
  color: var(--gray-500);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(228, 87, 31, .17) 0%, rgba(228, 87, 31, 0) 58%),
    var(--ink-900);
  padding: calc(var(--header-h) + 32px) 0 56px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 32px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(46px, 13vw, 88px);
  line-height: .94;
  letter-spacing: -.03em;
  color: var(--paper-050);
}

.page-about .about-hero__lede {
  margin: 24px 0 0;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--gray-200);
  max-width: 48ch;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-size: var(--fs-32);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--orange-500);
}

.page-about .about-stat__label {
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--gray-200);
}

.page-about .about-hero__media {
  align-self: end;
}

/* ============ 沿革 ============ */
.page-about .about-origin {
  background: var(--paper-100);
  color: var(--ink-900);
  padding: 56px 0 64px;
}

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

.page-about .about-origin__index-title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--orange-500);
  border-bottom: 1px solid var(--line-ink);
}

.page-about .about-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  font-size: var(--fs-14);
  color: var(--ink-800);
  text-decoration: none;
  transition: color 120ms var(--ease);
}

.page-about .about-toc__link:hover {
  color: var(--orange-500);
}

.page-about .about-toc__num {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--orange-500);
}

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

.page-about .about-timeline {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
  border-left: 1px solid var(--about-track);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange-500);
  box-shadow: 0 0 0 4px var(--paper-100);
}

.page-about .about-timeline__era {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--orange-500);
}

.page-about .about-timeline__title {
  margin: 6px 0 8px;
  font-size: var(--fs-22);
  line-height: 1.32;
  color: var(--ink-900);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-800);
}

/* ============ 团队 ============ */
.page-about .about-team {
  background: var(--ink-900);
  color: var(--paper-050);
  padding: 56px 0 64px;
  border-top: 1px solid var(--line);
}

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

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

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

.page-about .about-role {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-role__num {
  font-size: var(--fs-14);
  letter-spacing: .08em;
  color: var(--orange-500);
  padding-top: 3px;
}

.page-about .about-role__name {
  margin: 0 0 6px;
  font-size: var(--fs-17);
  letter-spacing: -.01em;
  color: var(--paper-050);
}

.page-about .about-role__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray-200);
}

/* ============ 旧版结构 ============ */
.page-about .about-legacy {
  background: var(--paper-050);
  color: var(--ink-900);
  padding: 56px 0 64px;
}

.page-about .about-legacy__grid {
  display: grid;
  gap: 28px;
  margin-top: 8px;
}

.page-about .about-quote {
  position: relative;
  margin: 0;
  padding: 26px 24px 26px 36px;
  background: var(--paper-100);
  color: var(--ink-900);
}

.page-about .about-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 4px;
  background: var(--orange-500);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--fs-22);
  line-height: 1.5;
  letter-spacing: -.01em;
}

.page-about .about-legacy__body p {
  margin: 0 0 16px;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--ink-800);
  max-width: 52ch;
}

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

/* ============ 内容来源 ============ */
.page-about .about-sources {
  background: var(--ink-800);
  color: var(--paper-050);
  padding: 56px 0 64px;
}

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

.page-about .about-sources__body p {
  margin: 0 0 14px;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--gray-200);
  max-width: 54ch;
}

.page-about .about-fold {
  margin-top: 26px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-14);
  letter-spacing: .08em;
  color: var(--paper-050);
  transition: color 120ms var(--ease);
}

.page-about .about-fold__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-fold__summary:hover {
  color: var(--orange-300);
}

.page-about .about-fold__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-about .about-fold__icon::before,
.page-about .about-fold__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 200ms var(--ease);
}

.page-about .about-fold__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .about-fold__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-about .about-fold[open] .about-fold__icon::after {
  transform: scaleY(0);
}

.page-about .about-fold__body {
  padding: 0 0 22px;
}

.page-about .about-fold__body p {
  margin: 0 0 10px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gray-200);
}

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

/* ============ 维护节奏 ============ */
.page-about .about-cadence {
  background: var(--paper-100);
  color: var(--ink-900);
  padding: 56px 0 64px;
}

.page-about .about-cadence__list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-cadence__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 6px 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line-ink);
  align-items: baseline;
}

.page-about .about-cadence__row:last-child {
  border-bottom: 1px solid var(--line-ink);
}

.page-about .about-cadence__cycle {
  font-size: var(--fs-14);
  letter-spacing: .12em;
  color: var(--orange-500);
}

.page-about .about-cadence__what {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--fs-17);
  color: var(--ink-900);
}

.page-about .about-cadence__note {
  grid-column: 2;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--gray-500);
}

/* ============ 奖项与收束 ============ */
.page-about .about-awards {
  background: var(--ink-900);
  color: var(--paper-050);
  padding: 56px 0 64px;
  border-top: 1px solid var(--line);
}

.page-about .about-awards__inner {
  max-width: 720px;
}

.page-about .about-awards__text {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--gray-200);
  max-width: 50ch;
}

.page-about .about-awards__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-top {
  margin: 40px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-top__link {
  display: inline-block;
  padding: 8px 14px;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--gray-200);
  text-decoration: none;
  background: var(--glass);
  transition: color 120ms var(--ease), background 120ms var(--ease);
}

.page-about .about-top__link:hover {
  color: var(--ink-900);
  background: var(--orange-500);
}

/* ============ 断点 ============ */
@media (min-width: 720px) {
  .page-about .about-cadence__row {
    grid-template-columns: 110px minmax(0, 1.1fr) minmax(0, 1.4fr);
  }

  .page-about .about-cadence__note {
    grid-column: 3;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 56px) 0 80px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px 24px;
  }

  .page-about .about-origin,
  .page-about .about-team,
  .page-about .about-legacy,
  .page-about .about-sources,
  .page-about .about-cadence,
  .page-about .about-awards {
    padding: 80px 0 88px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-origin__index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-toc {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-toc__item {
    border-bottom: 1px solid var(--line-ink);
  }

  .page-about .about-timeline {
    position: relative;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 24px;
    margin-top: 56px;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 4px;
    height: 1px;
    background: var(--about-track);
  }

  .page-about .about-timeline__item {
    padding: 34px 0 0;
    border-left: 0;
  }

  .page-about .about-timeline__item::before {
    left: 0;
    top: 0;
    box-shadow: 0 0 0 5px var(--paper-100);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    grid-template-areas:
      "intro media"
      "roles media";
    column-gap: 56px;
    row-gap: 28px;
    align-items: start;
  }

  .page-about .about-team__intro {
    grid-area: intro;
  }

  .page-about .about-team__media {
    grid-area: media;
  }

  .page-about .about-roles {
    grid-area: roles;
  }

  .page-about .about-legacy__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
  }

  .page-about .about-sources__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }
}
<<<END>>>