.page-about {
  --about-line: rgba(215, 169, 75, 0.24);
  --about-line-soft: rgba(43, 52, 66, 0.14);
  background: var(--paper-50);
  color: var(--body-ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink-950);
  color: var(--paper-50);
  padding-top: clamp(18px, 3vw, 32px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% 30% 40% -10%;
  background: radial-gradient(circle at 30% 30%, rgba(215, 169, 75, 0.16), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__note {
  position: absolute;
  top: clamp(20px, 4vw, 46px);
  right: clamp(14px, 3vw, 34px);
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.42em;
  color: var(--gold-300);
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding-block: clamp(26px, 4vw, 44px) clamp(26px, 4vw, 42px);
}

.page-about .about-hero__crumb {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__eyebrow {
  margin: 0;
  color: var(--gold-300);
  letter-spacing: 0.24em;
  font-size: 12px;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 5.6vw, 56px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--paper-50);
  max-width: 18em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(247, 243, 232, 0.78);
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 14px 16px;
  background: var(--ink-900);
}

.page-about .meta-num {
  font-family: var(--font-index);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-300);
  font-variant-numeric: tabular-nums;
}

.page-about .meta-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(247, 243, 232, 0.6);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

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

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  padding-block: clamp(34px, 5vw, 72px);
}

.page-about .about-rail {
  min-width: 0;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--ink-950);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .anchor-nav {
  display: flex;
  flex-direction: row;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .anchor-link {
  flex: 0 0 auto;
  padding: 8px 4px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--body-ink);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .anchor-link:hover,
.page-about .anchor-link:focus-visible {
  color: var(--ink-950);
  border-bottom-color: var(--gold-500);
}

.page-about .anchor-link[aria-current="location"] {
  color: var(--ink-950);
  font-weight: 600;
  border-bottom-color: var(--gold-500);
}

.page-about .about-doc {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(34px, 4.6vw, 64px);
  border-top: 1px solid var(--about-line-soft);
  scroll-margin-top: clamp(72px, 10vw, 112px);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section__head {
  max-width: 58ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-section__head .eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--cinnabar-500);
}

.page-about .about-section .section-heading {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.34;
  letter-spacing: 0.01em;
  color: var(--ink-950);
}

/* 深色展区 */
.page-about .about-section--ink {
  margin-block: clamp(18px, 3vw, 30px);
  padding-inline: clamp(18px, 3.4vw, 42px);
  padding-block: clamp(30px, 4.2vw, 52px);
  background: var(--ink-900);
  color: var(--paper-50);
  border-top: 0;
  border-radius: 2px;
  box-shadow: 0 30px 70px -52px rgba(7, 17, 31, 0.9);
}

.page-about .about-section--ink .eyebrow {
  color: var(--gold-300);
}

.page-about .about-section--ink .section-heading {
  color: var(--paper-50);
}

/* ---------- 通用文本 ---------- */
.page-about .about-copy p {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--body-ink);
}

.page-about .about-copy p + p {
  margin-top: 1em;
}

.page-about .about-lead {
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.75;
  color: var(--ink-950);
}

.page-about .grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

/* ---------- 定位展签 ---------- */
.page-about .position-card {
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--paper-100);
  border: 1px solid var(--about-line-soft);
  border-radius: 2px;
  align-self: start;
}

.page-about .position-card .exhibit-index {
  margin: 0 0 10px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cinnabar-500);
}

.page-about .position-card h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.4;
  color: var(--ink-950);
}

.page-about .position-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .position-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--body-ink);
}

.page-about .position-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background: var(--gold-500);
}

/* ---------- 时间线 ---------- */
.page-about .timeline-media {
  margin: 0 0 clamp(22px, 3vw, 30px);
  border: 1px solid var(--about-line);
  background: var(--ink-800);
  overflow: hidden;
}

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

.page-about .media-caption {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(247, 243, 232, 0.6);
}

.page-about .tab-list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
  border-bottom: 1px solid var(--about-line);
  scrollbar-width: thin;
}

.page-about .tab {
  flex: 0 0 auto;
  appearance: none;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid var(--about-line);
  border-radius: 2px;
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(247, 243, 232, 0.72);
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .tab:hover {
  border-color: var(--gold-500);
  color: var(--paper-50);
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 3px;
}

.page-about .tab[aria-selected="true"] {
  background: var(--gold-500);
  border-color: var(--gold-500);
  color: var(--ink-950);
  font-weight: 600;
}

.page-about .tab-panel:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 6px;
}

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-about .stage-list::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(215, 169, 75, 0.65), rgba(215, 169, 75, 0.1));
}

.page-about .stage-item {
  position: relative;
}

.page-about .stage-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(215, 169, 75, 0.14);
}

.page-about .stage-index {
  margin: 0 0 6px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-300);
  font-variant-numeric: tabular-nums;
}

.page-about .stage-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.4;
  color: var(--paper-50);
}

.page-about .stage-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(247, 243, 232, 0.74);
}

/* ---------- 团队 ---------- */
.page-about .team-media {
  margin: 0;
  border: 1px solid var(--about-line-soft);
  overflow: hidden;
}

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

.page-about .team-media .media-caption {
  color: var(--body-ink);
  opacity: 0.6;
}

.page-about .team-roles {
  list-style: none;
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
}

.page-about .role-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--paper-50);
}

.page-about .role-num {
  font-family: var(--font-index);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-950);
  font-variant-numeric: tabular-nums;
}

.page-about .role-name {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--body-ink);
}

/* ---------- 数据铭牌 ---------- */
.page-about .plaque-grid {
  list-style: none;
  margin: 0 0 clamp(24px, 3vw, 34px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .plaque {
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--ink-950);
  transition: background 0.22s var(--ease);
}

.page-about .plaque:hover {
  background: var(--ink-800);
}

.page-about .plaque-num {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 4.2vw, 44px);
  line-height: 1;
  color: var(--gold-300);
  font-variant-numeric: tabular-nums;
}

.page-about .plaque-num span {
  font-size: 0.44em;
  margin-left: 2px;
  font-family: var(--font-body);
  font-weight: 500;
}

.page-about .plaque-label {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.05em;
  color: rgba(247, 243, 232, 0.88);
}

.page-about .plaque-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.62;
  color: rgba(247, 243, 232, 0.5);
  transition: color 0.22s var(--ease);
}

.page-about .plaque:hover .plaque-note {
  color: rgba(247, 243, 232, 0.84);
}

/* ---------- 服务原则 ---------- */
.page-about .principles-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
}

.page-about .principles-item {
  padding-top: 16px;
  border-top: 1px solid rgba(215, 169, 75, 0.34);
}

.page-about .principles-index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--gold-300);
}

.page-about .principles-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.42;
  color: var(--paper-50);
}

.page-about .principles-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 243, 232, 0.72);
}

/* ---------- 去向 ---------- */
.page-about .commit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-bottom: clamp(22px, 3vw, 30px);
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
}

.page-about .commit-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--paper-50);
  color: inherit;
  text-decoration: none;
  transition: background 0.2s var(--ease);
}

.page-about .commit-card:hover,
.page-about .commit-card:focus-visible {
  background: var(--paper-100);
}

.page-about .commit-card:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: -3px;
}

.page-about .commit-index {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cinnabar-500);
}

.page-about .commit-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.42;
  color: var(--ink-950);
}

.page-about .commit-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--body-ink);
}

.page-about .commit-action {
  margin-top: auto;
  padding-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--ink-950);
}

.page-about .commit-action::after {
  content: "→";
  color: var(--gold-500);
  transition: transform 0.2s var(--ease);
}

.page-about .commit-card:hover .commit-action::after {
  transform: translateX(4px);
}

.page-about .commit-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  padding-top: clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .commit-foot p {
  flex: 1 1 260px;
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--body-ink);
}

.page-about .commit-foot a {
  color: var(--ink-950);
}

.page-about .index-return {
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ink-950);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--gold-500);
}

.page-about .index-return:hover {
  color: var(--cinnabar-500);
}

/* ---------- 显现 ---------- */
.page-about .reveal-armed {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.page-about .reveal-armed.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .commit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-hero__figure {
    aspect-ratio: 16 / 9;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.46fr);
    grid-template-areas:
      "crumb crumb"
      "eyebrow meta"
      "title meta"
      "lede meta";
    column-gap: clamp(32px, 5vw, 72px);
    row-gap: clamp(14px, 2vw, 24px);
    align-items: start;
  }

  .page-about .about-hero__crumb {
    grid-area: crumb;
  }

  .page-about .about-hero__eyebrow {
    grid-area: eyebrow;
  }

  .page-about .about-hero__title {
    grid-area: title;
  }

  .page-about .about-hero__lede {
    grid-area: lede;
  }

  .page-about .about-hero__meta {
    grid-area: meta;
    margin-top: 6px;
  }

  .page-about .position-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

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

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: clamp(40px, 6vw, 84px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: clamp(84px, 9vw, 108px);
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .anchor-nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--about-line-soft);
  }

  .page-about .anchor-link {
    margin-left: -1px;
    padding: 9px 0 9px 16px;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), padding-left 0.2s var(--ease);
  }

  .page-about .anchor-link:hover,
  .page-about .anchor-link:focus-visible {
    border-bottom: 0;
    border-left-color: var(--gold-500);
    padding-left: 20px;
  }

  .page-about .anchor-link[aria-current="location"] {
    border-bottom: 0;
    border-left-color: var(--gold-500);
    padding-left: 20px;
  }
}

@media (max-width: 719px) {
  .page-about .about-hero__note {
    display: none;
  }

  .page-about .role-num {
    font-size: 22px;
  }

  .page-about .plaque-note {
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .reveal-armed {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .plaque,
  .page-about .tab,
  .page-about .commit-card,
  .page-about .anchor-link,
  .page-about .plaque-note {
    transition: none;
  }

  .page-about .commit-card:hover .commit-action::after {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>