.page-about {
  --about-hairline: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about__crumb {
  padding-top: 18px;
}

.page-about .about-block {
  padding: 44px 0;
}

/* ---------- 序言头部 ---------- */
.page-about .about-head {
  display: grid;
  gap: 26px;
  padding-top: 10px;
  padding-bottom: 36px;
  align-items: start;
}

.page-about .about-head__text h1 {
  margin: 10px 0 18px;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-head__text h1::after {
  content: "";
  display: block;
  width: 68px;
  height: 3px;
  margin-top: 20px;
  background: var(--red);
}

.page-about .about-head .lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-index {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1.5px solid var(--line);
  background: var(--paper-light);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--red);
  background: #fffdf8;
  color: var(--red-deep);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-about .about-frame {
  margin: 0;
  border: var(--border);
  box-shadow: var(--shadow-hard);
  background: var(--paper-light);
  overflow: hidden;
}

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

.page-about .about-frame .figure__caption {
  padding: 12px 16px;
  border-top: var(--about-hairline);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 通用标题 ---------- */
.page-about .about-h2 {
  margin: 8px 0 16px;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(23px, 4.3vw, 36px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

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

.page-about .eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--red);
}

.page-about .about-eyebrow--light {
  color: var(--gold);
}

/* ---------- 序言窄栏 ---------- */
.page-about .about-prologue {
  border-top: var(--border);
  border-bottom: var(--border);
  background: var(--paper-light);
}

.page-about .about-prologue__inner {
  max-width: 760px;
  border-left: 3px solid var(--red);
  padding-left: 18px;
}

.page-about .about-prose {
  max-width: 70ch;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
}

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

.page-about .about-prose > p:first-of-type::first-letter {
  float: left;
  margin: 6px 8px 0 0;
  font-family: var(--font-serif);
  font-size: 44px;
  line-height: 1;
  color: var(--red);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin: 40px 0;
  padding: 44px 0 50px;
  background: var(--ink);
  color: var(--paper);
  border-top: var(--border);
  border-bottom: var(--border);
}

.page-about .about-timeline__lede {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gold-pale);
}

.page-about .stage-list {
  position: relative;
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .stage-list::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, 0.18));
}

.page-about .stage {
  position: relative;
  padding-left: 42px;
}

.page-about .stage::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 20px;
  width: 16px;
  height: 16px;
  background: var(--red);
  border: 2px solid var(--gold);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.55);
}

.page-about .stage__item {
  background: var(--paper-light);
  color: var(--ink);
}

.page-about .stage__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: var(--border);
  background: var(--paper-light);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  list-style: none;
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

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

.page-about .stage__summary:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-hard);
}

.page-about .stage__item[open] .stage__summary {
  background: var(--gold-pale);
  border-bottom: 0;
}

.page-about .stage__num {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  font-family: var(--font-serif);
  font-size: 15px;
  color: #fff;
  background: var(--red);
  border: 2px solid var(--gold);
}

.page-about .stage__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .stage__phase {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .stage__sub {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .stage__toggle {
  position: relative;
  flex: 0 0 auto;
  margin-left: auto;
  width: 20px;
  height: 20px;
  border: 2px solid var(--ink);
}

.page-about .stage__toggle::before,
.page-about .stage__toggle::after {
  content: "";
  position: absolute;
  background: var(--ink);
}

.page-about .stage__toggle::before {
  left: 3px;
  right: 3px;
  top: 6px;
  height: 2px;
}

.page-about .stage__toggle::after {
  top: 3px;
  bottom: 3px;
  left: 6px;
  width: 2px;
}

.page-about .stage__item[open] .stage__toggle::after {
  display: none;
}

.page-about .stage__body {
  padding: 14px 16px 18px;
  border: var(--border);
  border-top: 0;
  background: var(--paper);
}

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

.page-about .stage__points {
  list-style: none;
  display: grid;
  gap: 7px;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .stage__points li {
  position: relative;
  padding-left: 17px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .stage__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .about-team__lede {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .team-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 18px 16px;
  border: var(--border);
  background: var(--paper-light);
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.page-about .team-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--red);
  box-shadow: var(--shadow-hard);
}

.page-about .team-card__icon {
  display: block;
  width: 32px;
  height: 32px;
  color: var(--red);
}

.page-about .team-card__icon svg {
  width: 100%;
  height: 100%;
}

.page-about .team-card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-card__duty {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .team-card__meta {
  margin: 2px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  transition: color 0.18s ease;
}

.page-about .team-card:hover .team-card__meta {
  color: var(--red-deep);
}

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

/* ---------- 版本治理 ---------- */
.page-about .about-gov {
  background: var(--paper-light);
  border-top: var(--border);
  border-bottom: var(--border);
}

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

.page-about .about-gov__status {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 20px 0 0;
  padding: 12px 14px;
  border: var(--border);
  background: var(--paper);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .about-gov__table .table-scroll {
  border: var(--border);
  box-shadow: var(--shadow-soft);
  background: #fffdf8;
}

.page-about .about-gov__caption {
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  background: var(--gold-pale);
  border-bottom: var(--about-hairline);
}

.page-about .about-gov__table .ledger {
  font-size: 14px;
}

.page-about .about-gov__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-link {
  color: var(--red-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-link:hover {
  color: var(--red);
}

/* ---------- 区域与备案 ---------- */
.page-about .about-region__grid {
  display: grid;
  gap: 24px;
  align-items: start;
}

.page-about .region-facts {
  display: grid;
  gap: 0;
  margin: 22px 0 0;
  border: var(--border);
  background: var(--paper-light);
}

.page-about .region-facts__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 11px 14px;
}

.page-about .region-facts__row + .region-facts__row {
  border-top: var(--about-hairline);
}

.page-about .region-facts dt {
  flex: 0 0 84px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.page-about .region-facts dd {
  margin: 0;
  flex: 1 1 160px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .region-facts__mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-about .about-record {
  margin-top: 28px;
  border: var(--border);
  background: var(--paper-light);
  box-shadow: var(--shadow-soft);
}

.page-about .about-record__head {
  margin: 0;
  padding: 10px 16px;
  background: var(--jade);
  color: #f4fbf8;
  font-size: 12.5px;
  letter-spacing: 0.14em;
}

.page-about .record-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  padding: 11px 16px;
}

.page-about .record-row + .record-row {
  border-top: var(--about-hairline);
}

.page-about .record-row__label {
  flex: 0 0 74px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.page-about .record-row__value {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-about .record-row__value--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.page-about .record-row__copy {
  flex: 0 0 auto;
}

/* ---------- 收束入口 ---------- */
.page-about .about-next {
  padding-bottom: 56px;
}

.page-about .about-next__grid {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .next-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 18px 18px 20px;
  border: var(--border);
  background: var(--paper-light);
  box-shadow: var(--shadow-soft);
  color: var(--ink);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  background: var(--ink);
  color: var(--paper-light);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-about .next-card__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--red);
}

.page-about .next-card:hover .next-card__num,
.page-about .next-card:hover .next-card__desc {
  color: var(--gold-pale);
}

.page-about .next-card__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
}

.page-about .next-card__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

.page-about .next-card__arrow {
  margin-top: 4px;
  font-size: 16px;
  color: var(--red);
}

.page-about .next-card:hover .next-card__arrow {
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-block {
    padding: 54px 0;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-prologue__inner {
    padding-left: 26px;
  }

  .page-about .stage {
    padding-left: 46px;
  }
}

@media (min-width: 900px) {
  .page-about .about-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    padding-top: 16px;
    padding-bottom: 48px;
  }

  .page-about .about-head__figure {
    margin-top: 12px;
  }

  .page-about .about-gov__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 36px;
  }

  .page-about .about-team__figure {
    margin-top: 30px;
  }
}

@media (min-width: 1100px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .stage-list {
    gap: 16px;
  }

  .page-about .stage__summary {
    padding: 16px 20px;
  }

  .page-about .stage__body {
    padding: 16px 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .team-card,
  .page-about .next-card,
  .page-about .stage__summary,
  .page-about .team-card__meta {
    transition: none;
  }

  .page-about .stage__summary:hover,
  .page-about .team-card:hover,
  .page-about .next-card:hover {
    transform: none;
  }
}
<<<END>>>