.page-about {
  --about-rail: 176px;
  --about-stagger: 44px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
}

.page-about .wrap {
  position: relative;
  z-index: 1;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 36px) 0 clamp(36px, 6vw, 64px);
  border-bottom: 1px solid var(--hair);
  background:
    radial-gradient(120% 80% at 10% 0%, rgba(200, 162, 106, 0.10), transparent 62%),
    linear-gradient(180deg, var(--deep), var(--ink) 72%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(42, 58, 52, 0.5) 0 1px, transparent 1px 84px);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 88%);
  mask-image: linear-gradient(180deg, #000, transparent 88%);
}

.page-about .about-hero__top {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(30px, 5.6vw, 68px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.015em;
  max-width: 19em;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  padding-left: 16px;
  border-left: 2px solid var(--bronze);
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
}

.page-about .about-hero__facts {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-hero__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--hair);
  background: var(--deep);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.06);
}

/* ---------- 时间锚点 ---------- */
.page-about .stamp {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-about .stamp__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .stamp__value {
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .stamp__toggle {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  background: transparent;
  color: var(--bronze-lit);
  border: 1px solid var(--hair);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .stamp__toggle:hover,
.page-about .stamp__toggle:focus-visible {
  border-color: var(--bronze);
  color: var(--paper);
  background: var(--lift);
}

.page-about .stamp__panel {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

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

/* ---------- 通用段落节奏 ---------- */
.page-about .section {
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-about .section__head {
  max-width: 62ch;
}

.page-about .section__head .lede {
  margin-top: 14px;
  color: var(--mist);
}

/* ---------- 01 定位 ---------- */
.page-about .pos-grid {
  margin-top: clamp(28px, 4vw, 44px);
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .pos-card {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  background: var(--ink);
  transition: background 180ms var(--ease);
}

.page-about .pos-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--bronze);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms var(--ease);
}

.page-about .pos-card:hover,
.page-about .pos-card:focus-within {
  background: var(--deep);
}

.page-about .pos-card:hover::before,
.page-about .pos-card:focus-within::before {
  transform: scaleX(1);
}

.page-about .pos-card__index {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--bronze);
}

.page-about .pos-card .h3 {
  margin: 0 0 12px;
}

.page-about .pos-card__text {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .pos-card__text:last-child {
  margin-bottom: 0;
}

/* ---------- 02 演进 ---------- */
.page-about .history-layout {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 24px;
}

.page-about .year-rail__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .year-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .year-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--hair);
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  border-color: var(--bronze);
  color: var(--bronze-lit);
  background: var(--deep);
}

.page-about .year-rail__num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--bronze-lit);
}

.page-about .year-rail__name {
  font-size: 13px;
  color: var(--mist);
}

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .stage {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--deep);
  border: 1px solid var(--hair);
  scroll-margin-top: calc(var(--bar-h, 56px) + 28px);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .stage:hover,
.page-about .stage:focus-within,
.page-about .stage:target {
  transform: translateY(-2px);
  border-color: var(--bronze);
  background: var(--lift);
}

.page-about .stage__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .stage__num {
  font-family: var(--mono);
  font-size: clamp(18px, 2.2vw, 24px);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .stage__title {
  margin: 0;
  flex: 1 1 12em;
}

.page-about .stage__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .stage__foot {
  margin-top: 14px;
}

.page-about .stage__link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bronze-lit);
  text-decoration: none;
  border-bottom: 1px dashed var(--bronze);
  padding-bottom: 2px;
}

.page-about .stage__link:hover,
.page-about .stage__link:focus-visible {
  color: var(--paper);
  border-bottom-style: solid;
}

.page-about .stage__more {
  margin: 0;
  padding-left: 0;
  border-left: 2px solid transparent;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-about .stage:hover .stage__more,
.page-about .stage:focus-within .stage__more,
.page-about .stage:target .stage__more {
  max-height: 200px;
  opacity: 1;
  margin-top: 12px;
  padding-left: 12px;
  border-left-color: var(--cyan);
}

.page-about .about-chart {
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--hair);
  background: var(--deep);
}

.page-about .about-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-chart .chart-grid line {
  stroke: var(--hair);
  stroke-width: 1;
}

.page-about .about-chart .chart-area {
  fill: var(--bronze);
  opacity: 0.1;
}

.page-about .about-chart .chart-line {
  fill: none;
  stroke: var(--bronze);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-about .about-chart .chart-dots circle {
  fill: var(--cyan);
}

.page-about .about-chart .chart-labels text {
  fill: var(--mist);
  font-family: var(--mono);
  font-size: 12px;
}

.page-about .about-chart .chart-note {
  fill: var(--bronze-lit);
  font-family: var(--mono);
  font-size: 12px;
}

.page-about .about-chart figcaption {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-archive {
  margin: clamp(32px, 5vw, 56px) 0 0;
  overflow: hidden;
  border: 1px solid var(--hair);
  background: var(--deep);
}

.page-about .about-archive img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 20 / 13;
}

.page-about .about-archive .media-frame__caption {
  padding: 12px clamp(16px, 2vw, 22px);
  margin: 0;
  border-top: 1px solid var(--hair);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--ink), var(--deep) 50%, var(--ink));
}

.page-about .team-layout {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .team-groups {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-about .team-card {
  padding: 22px 0;
  border-bottom: 1px solid var(--hair);
  transition: background 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within,
.page-about .team-card:focus {
  background: linear-gradient(90deg, rgba(200, 162, 106, 0.08), transparent 72%);
  padding-left: 14px;
}

.page-about .team-card:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 4px;
}

.page-about .team-card__index {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .team-card__title {
  margin: 0 0 8px;
}

.page-about .team-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .team-card__duty {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.75;
  color: var(--bronze-lit);
  transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease);
}

.page-about .team-card:hover .team-card__duty,
.page-about .team-card:focus-within .team-card__duty,
.page-about .team-card:focus .team-card__duty {
  max-height: 140px;
  opacity: 1;
  margin-top: 10px;
}

.page-about .team-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--hair);
  background: var(--deep);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9);
}

/* ---------- 04 栏目治理 ---------- */
.page-about .gov-grid {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .gov-stats {
  display: grid;
  background: var(--ink);
}

.page-about .gov-stat {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px clamp(20px, 3vw, 30px);
  border-bottom: 1px solid var(--hair);
}

.page-about .gov-stat:last-child {
  border-bottom: 0;
}

.page-about .gov-stat__num {
  font-family: var(--mono);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--bronze-lit);
}

.page-about .gov-stat__label {
  font-size: 14px;
  color: var(--mist);
}

.page-about .gov-notes {
  background: var(--deep);
  padding: clamp(22px, 3vw, 34px);
}

.page-about .gov-notes p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

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

.page-about .gov-code {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px dashed var(--hair);
  background: rgba(20, 51, 43, 0.4);
}

.page-about .gov-code__label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .gov-code__value {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(26px, 3.6vw, 40px);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .gov-code__legend {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .tag-groups {
  margin-top: 28px;
  display: grid;
  gap: 18px;
}

.page-about .tag-group__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

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

.page-about .gov-stamp {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--hair);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 24px;
}

.page-about .gov-stamp__link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 216, 200, 0.45);
}

.page-about .gov-stamp__link:hover,
.page-about .gov-stamp__link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-about .gov-stamp .stamp__panel {
  flex: 1 1 100%;
}

/* ---------- 05 协作与记录 ---------- */
.page-about .about-partners {
  background:
    repeating-linear-gradient(0deg, rgba(42, 58, 52, 0.28) 0 1px, transparent 1px 46px),
    var(--ink);
}

.page-about .partner-layout {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 28px;
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .partner-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px 6px;
  background: var(--deep);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--bronze);
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.page-about .partner-cell:hover {
  background: var(--lift);
  color: var(--bronze-lit);
}

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

.page-about .honor {
  padding-left: 16px;
  border-left: 2px solid var(--bronze);
}

.page-about .honor__label {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

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

/* ---------- 06 合作入口 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(72px, 11vw, 150px);
}

.page-about .about-cta__inner {
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--hair);
}

.page-about .about-cta__title {
  margin: 14px 0 0;
  max-width: 18em;
}

.page-about .about-cta__lede {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-cta__hint {
  margin: 16px 0 0;
  padding-left: 0;
  border-left: 2px solid transparent;
  max-width: 60ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-about .about-cta__actions:focus-within ~ .about-cta__hint {
  color: var(--bronze-lit);
  border-left-color: var(--bronze);
  padding-left: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-about .tag-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 32px;
  }
}

@media (min-width: 860px) {
  .page-about .pos-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .gov-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  }

  .page-about .about-hero__figure {
    max-height: 420px;
  }
}

@media (min-width: 900px) {
  .page-about .partner-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .history-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .year-rail {
    position: sticky;
    top: calc(var(--bar-h, 56px) + 32px);
  }

  .page-about .year-rail__list {
    display: block;
    overflow: visible;
    border-left: 1px solid var(--hair);
  }

  .page-about .year-rail__link {
    position: relative;
    width: 100%;
    border: 0;
    padding: 11px 0 11px 18px;
  }

  .page-about .year-rail__link::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 50%;
    width: 7px;
    height: 7px;
    margin-top: -3.5px;
    border-radius: 50%;
    background: var(--hair);
    transition: background 180ms var(--ease), box-shadow 180ms var(--ease);
  }

  .page-about .year-rail__link:hover,
  .page-about .year-rail__link:focus-visible {
    background: transparent;
  }

  .page-about .year-rail__link:hover::before,
  .page-about .year-rail__link:focus-visible::before {
    background: var(--bronze);
    box-shadow: 0 0 0 3px rgba(200, 162, 106, 0.18);
  }

  .page-about .stage {
    width: 100%;
  }

  .page-about .stage:nth-child(even) {
    width: calc(100% - var(--about-stagger));
    margin-left: var(--about-stagger);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .team-figure {
    position: sticky;
    top: calc(var(--bar-h, 56px) + 32px);
    aspect-ratio: 3 / 4;
  }
}

@media (hover: none) {
  .page-about .stage__more,
  .page-about .team-card__duty {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
    padding-left: 12px;
    border-left-color: var(--cyan);
  }
}
</final>