.page-about {
  background: var(--ink);
  color: var(--white);
}

/* ---------- 面包屑间距 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(4px, 1vw, 10px);
}

/* ---------- 首屏：窄栏刊物式 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 60px) 0 clamp(44px, 6vw, 80px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-soft) 18%, var(--line-soft) 82%, transparent);
}

.page-about .about-hero .eyebrow {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  font-size: clamp(32px, 5.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 900;
  margin: 16px 0 22px;
  max-width: 18ch;
  color: var(--white);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: transparent;
  background: linear-gradient(120deg, var(--violet-soft) 0%, var(--cyan) 82%);
  -webkit-background-clip: text;
  background-clip: text;
}

.page-about .about-hero .lede {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--white);
  opacity: .86;
  max-width: 62ch;
  margin: 0;
}

.page-about .about-quote {
  margin: clamp(28px, 4vw, 46px) 0 12px;
  padding-left: 20px;
  border-left: 2px solid var(--violet);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.65;
  color: var(--violet-soft);
}

.page-about .about-quote-src {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--grey);
  margin: 0;
  padding-left: 22px;
}

/* ---------- 正文段落 ---------- */
.page-about .prose p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--white);
  margin: 0 0 1.2em;
}

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

.page-about .prose .num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-about .about-mission-2 {
  padding-top: 0;
}

/* ---------- 章节头补充 ---------- */
.page-about .section-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
  margin: 10px 0 0;
  max-width: 62ch;
}

/* ---------- 沿革时间线 ---------- */
.page-about .about-tl-visual {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 30px 30px;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--line-soft);
}

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

.page-about .tl-node:last-child::before {
  display: none;
}

.page-about .tl-mark {
  position: absolute;
  left: 1px;
  top: 3px;
  width: 10px;
  height: 10px;
  background: var(--violet);
  box-shadow: 0 0 0 1px var(--ink);
  transition: background var(--dur) var(--ease);
}

.page-about .tl-year {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
  margin: 0;
}

.page-about .tl-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
  line-height: 1.4;
  margin: 6px 0 6px;
}

.page-about .tl-body {
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey);
  margin: 0;
}

.page-about .tl-node:hover .tl-mark {
  background: var(--cyan);
}

.page-about .tl-node:hover .tl-title {
  color: var(--cyan);
}

@media (min-width: 900px) {
  .page-about .timeline {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    column-gap: clamp(14px, 1.6vw, 26px);
    position: relative;
    margin-top: 8px;
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 62px;
    height: 1px;
    background: linear-gradient(90deg, var(--line) 0%, var(--violet) 22%, var(--cyan) 64%, var(--gold) 100%);
    opacity: .85;
  }

  .page-about .tl-node {
    padding: 96px 0 0;
  }

  .page-about .tl-node::before {
    display: none;
  }

  .page-about .tl-mark {
    left: 0;
    top: 56px;
    width: 13px;
    height: 13px;
    box-shadow: 0 0 0 3px var(--ink), 0 0 0 4px var(--cyan);
  }

  .page-about .tl-year {
    position: absolute;
    top: 26px;
    left: 0;
  }

  .page-about .tl-card {
    padding-right: 12px;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 44px);
  align-items: start;
}

.page-about .team-index {
  list-style: none;
  padding: 0;
  margin: 0 0 clamp(24px, 3vw, 36px);
  border-top: 1.5px solid var(--line);
}

.page-about .ti-item {
  border-bottom: 1.5px solid var(--line);
}

.page-about .ti-link {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px 6px;
  text-decoration: none;
  color: var(--white);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ti-link:hover,
.page-about .ti-link:focus-visible {
  color: var(--cyan);
  background: rgba(53, 230, 224, .06);
}

.page-about .ti-num {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--violet-soft);
}

.page-about .ti-name {
  font-size: 17px;
  font-weight: 800;
}

.page-about .ti-count {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--grey);
}

.page-about .team-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .tn {
  padding: 18px 20px;
  background: var(--ink-2);
  border: 1.5px solid var(--line);
  box-shadow: var(--shadow);
  scroll-margin-top: 120px;
}

.page-about .tn h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .tn h3 .mono {
  color: var(--violet-soft);
  font-weight: 400;
  margin-right: 8px;
}

.page-about .tn p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey);
}

.page-about .about-team-visual {
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

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

/* ---------- 覆盖范围与核对流程 ---------- */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 38px);
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .coverage-intro p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--white);
  margin: 0 0 1em;
}

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

.page-about .province-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.page-about .province-grid li {
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--grey);
  background: linear-gradient(160deg, rgba(108, 59, 244, .14), rgba(53, 230, 224, .05));
  border: 1px solid var(--line-soft);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .province-grid li:nth-child(4n+1) {
  background: linear-gradient(160deg, rgba(108, 59, 244, .34), rgba(53, 230, 224, .1));
  color: var(--white);
}

.page-about .province-grid li:hover {
  background: linear-gradient(160deg, var(--violet), rgba(53, 230, 224, .28));
  color: var(--white);
}

.page-about .checkflow {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5px;
  background: var(--line);
  border: 1.5px solid var(--line);
}

.page-about .checkflow li {
  background: var(--ink);
  padding: clamp(18px, 2.4vw, 28px);
}

.page-about .cf-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .checkflow h3 {
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .checkflow p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--grey);
}

@media (min-width: 780px) {
  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    align-items: start;
  }

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

/* ---------- 年度报告口径 ---------- */
.page-about .report-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  align-items: start;
}

.page-about .filter-bar {
  margin-bottom: 0;
}

.page-about .report-panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5px;
  background: var(--line);
  border: 1.5px solid var(--line);
  margin-top: 20px;
}

.page-about .report-panel {
  background: var(--ink);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .report-panel[hidden],
.page-about .report-panel.is-hidden {
  display: none;
}

.page-about .report-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--violet-soft);
  margin-bottom: 10px;
}

.page-about .report-panel h3 {
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .report-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey);
}

.page-about .report-aside .media-frame {
  margin: 20px 0 0;
}

@media (min-width: 700px) {
  .page-about .report-panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .report-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

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

/* ---------- 合作生态与青海运营 ---------- */
.page-about .about-eco {
  padding-bottom: 0;
}

.page-about .region-card {
  position: relative;
  padding: clamp(26px, 4vw, 56px);
  background: linear-gradient(150deg, var(--ink-2) 0%, rgba(108, 59, 244, .16) 58%, var(--ink) 100%);
  border: 1.5px solid var(--line);
  box-shadow: 10px 10px 0 0 rgba(35, 48, 77, .62);
  overflow: hidden;
}

.page-about .region-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(35, 48, 77, .34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 48, 77, .34) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .28;
  pointer-events: none;
}

.page-about .region-card > * {
  position: relative;
  z-index: 1;
}

.page-about .region-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gold);
  margin-bottom: 14px;
}

.page-about .region-card h2 {
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 900;
  color: var(--white);
  margin: 0 0 16px;
  line-height: 1.2;
  max-width: 18ch;
}

.page-about .region-card p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey);
  max-width: 62ch;
  margin: 0 0 12px;
}

.page-about .region-note {
  color: var(--white);
  opacity: .78;
}

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

/* ---------- 响应式与动效兜底 ---------- */
@media (max-width: 520px) {
  .page-about .province-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ti-link {
    grid-template-columns: 34px minmax(0, 1fr) auto;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ti-link,
  .page-about .tl-mark,
  .page-about .province-grid li {
    transition: none;
  }
}
<<<END>>>