.page-about {
  --about-cut: 26px;
  background:
    radial-gradient(1100px 560px at 82% -12%, rgba(231, 183, 90, 0.10), transparent 62%),
    var(--ink);
  color: var(--cloud);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-block: 22px 0;
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .breadcrumb { margin-bottom: 22px; }

.page-about .about-hero {
  display: grid;
  gap: 30px;
  align-items: end;
  padding-bottom: 42px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  color: var(--cloud);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold);
}

.page-about .about-hero .lede {
  margin: 18px 0 0;
  max-width: 54ch;
  color: rgba(247, 242, 231, 0.82);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-gold);
}

.page-about .about-facts__item dt {
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .about-facts__item dd {
  margin: 2px 0 0;
  font-size: var(--fs-14);
  color: var(--mist);
  line-height: 1.6;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line-gold);
  background: var(--char);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-gold);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体：索引 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  gap: 8px;
  padding-bottom: 8px;
}

.page-about .about-index {
  margin-bottom: 12px;
  padding-left: 14px;
  border-left: 1px solid var(--line-gold);
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

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

.page-about .about-index__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: rgba(247, 242, 231, 0.88);
  text-decoration: none;
  font-size: var(--fs-14);
  transition: color var(--dur) var(--ease);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.06em;
}

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

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

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding-block: 34px;
  border-top: 1px solid var(--line-gold);
  scroll-margin-top: 100px;
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-sec:target {
  border-top-color: var(--gold);
}

.page-about .about-sec__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-sec__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.28;
  color: var(--cloud);
}

.page-about .about-text p {
  margin: 0 0 14px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(247, 242, 231, 0.82);
}

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

.page-about .about-text-note {
  margin: 0 0 4px;
  font-size: var(--fs-14);
  color: var(--mist);
}

.page-about .about-split {
  display: grid;
  gap: 22px;
  margin-top: 20px;
}

.page-about .about-card {
  background: var(--char);
  border: 1px solid var(--line-gold);
  padding: 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

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

.page-about .about-row {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-gold);
}

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

.page-about .about-row__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--gold);
}

.page-about .about-row ul {
  margin: 0;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: rgba(247, 242, 231, 0.78);
}

/* ---------- 时间轨迹标签 ---------- */
.page-about .about-tabs { margin-top: 22px; }

.page-about .about-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
}

.page-about .about-tabs__tab {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-tabs__tab:hover {
  color: var(--gold);
  border-color: var(--line-gold-strong);
}

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

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

.page-about .about-tabs__panel {
  padding: 20px 18px;
  background: var(--char);
  border: 1px solid var(--line-gold);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-s);
}

.page-about .about-tabs__panel[hidden] { display: none; }

.page-about .about-tabs__when {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--gold);
  letter-spacing: 0.08em;
}

.page-about .about-tabs__panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--fs-24);
  line-height: 1.3;
  color: var(--cloud);
}

.page-about .about-tabs__panel p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(247, 242, 231, 0.82);
}

.page-about .about-rail {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 18px;
}

/* ---------- 印章模块 ---------- */
.page-about .about-seal {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 10px 0;
  padding: 24px 18px;
  border-left: 4px solid var(--cinnabar);
  background: linear-gradient(100deg, rgba(185, 52, 33, 0.22), rgba(21, 21, 26, 0.92) 62%);
}

.page-about .about-seal__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  background: var(--cinnabar);
  color: var(--cloud);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
  border-radius: 2px;
  transform: rotate(-4deg);
  box-shadow: 0 8px 20px rgba(185, 52, 33, 0.35);
}

.page-about .about-seal__text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 23px);
  line-height: 1.5;
  color: var(--cloud);
}

.page-about .about-seal__text small {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 团队矩阵 ---------- */
.page-about .team-side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .team-cell {
  background: var(--char);
  border: 1px solid var(--line-gold);
  padding: 16px;
  border-radius: var(--radius-s);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-cell:hover,
.page-about .team-cell:focus-within,
.page-about .team-cell:focus {
  border-color: var(--line-gold-strong);
  background: var(--iron);
  transform: translateY(-2px);
  outline: none;
}

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

.page-about .team-cell__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .team-cell__name {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  color: var(--cloud);
}

.page-about .team-cell__list {
  margin: 0;
  padding-left: 16px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(247, 242, 231, 0.78);
  opacity: 0.88;
  transition: opacity var(--dur) var(--ease);
}

.page-about .team-cell:hover .team-cell__list,
.page-about .team-cell:focus-within .team-cell__list,
.page-about .team-cell:focus .team-cell__list {
  opacity: 1;
}

/* ---------- 图版 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line-gold);
  background: var(--char);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-gold);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 归档统计 ---------- */
.page-about .archive-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  margin: 18px 0 16px;
}

.page-about .archive-stat {
  background: var(--char);
  border: 1px solid var(--line-gold);
  padding: 12px 14px;
}

.page-about .archive-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  line-height: 1.2;
  color: var(--gold);
}

.page-about .archive-stat span {
  font-size: 11px;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .about-archive-link {
  font-size: var(--fs-14) !important;
  color: var(--mist) !important;
}

/* ---------- 色板 ---------- */
.page-about .about-visual-text { max-width: 70ch; }

.page-about .swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .swatch {
  border: 1px solid var(--line-gold);
  background: var(--char);
}

.page-about .swatch__chip {
  display: block;
  height: 48px;
}

.page-about .swatch--gold { background: var(--gold); }
.page-about .swatch--cinnabar { background: var(--cinnabar); }
.page-about .swatch--ink { background: var(--ink); border-bottom: 1px solid var(--line-gold); }
.page-about .swatch--cloud { background: var(--cloud); }
.page-about .swatch--jade { background: var(--jade); }

.page-about .swatch__meta {
  display: block;
  padding: 8px 12px 10px;
}

.page-about .swatch__name {
  display: block;
  font-size: var(--fs-12);
  color: var(--cloud);
}

.page-about .swatch__hex {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: 32px;
  padding-block: 36px 48px;
  border-top: 1px solid var(--line-gold-strong);
  background: linear-gradient(180deg, rgba(231, 183, 90, 0.08), rgba(10, 10, 11, 0));
}

.page-about .about-cta__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.3;
  color: var(--cloud);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-16);
  color: rgba(247, 242, 231, 0.8);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-split--swap {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.45fr);
  }

  .page-about .about-sec {
    padding-block: 46px;
  }

  .page-about .about-seal {
    margin: 16px 0;
    padding: 30px 26px;
  }

  .page-about .about-cta {
    padding-block: 48px 64px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-cell,
  .page-about .about-tabs__tab,
  .page-about .team-cell__list,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .team-cell:hover,
  .page-about .team-cell:focus-within,
  .page-about .team-cell:focus {
    transform: none;
  }
}