/* ===== 品牌历程 · 页面专属样式 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.6vw, 38px) 0 clamp(34px, 6vw, 68px);
  background: linear-gradient(175deg, var(--c-cream-lt) 0%, var(--c-cream) 58%, var(--c-cream-lt) 100%);
  border-bottom: var(--bw) solid var(--c-ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -130px;
  right: -150px;
  width: min(62vw, 520px);
  aspect-ratio: 1;
  background: var(--c-red);
  opacity: 0.09;
  transform: rotate(14deg);
  border-radius: 18% 42% 22% 46%;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(88px, 20vw, 200px);
  height: 8px;
  background: linear-gradient(90deg, var(--c-red) 0 55%, var(--c-gold) 55% 100%);
}

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

.page-about .crumb {
  margin: 0 0 clamp(14px, 3vw, 24px);
}

.page-about .about-hero .eyebrow {
  margin: 0;
  color: var(--c-red-deep);
}

.page-about .about-h1 {
  margin: 10px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(31px, 7.4vw, 66px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-about .about-lede {
  margin: clamp(16px, 3vw, 22px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.78;
  color: var(--c-brown);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: clamp(22px, 4vw, 34px);
  padding-top: clamp(16px, 3vw, 22px);
  border-top: var(--bw) solid var(--c-ink);
}

.page-about .hero-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: var(--c-cream-lt);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-s);
  box-shadow: var(--shadow-mid);
}

.page-about .hero-stats .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(21px, 4.4vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-red-deep);
}

.page-about .hero-stats .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-brown);
}

.page-about .hero-note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-brown);
}

/* 章节头 */
.page-about .about-head {
  margin-bottom: clamp(20px, 4vw, 32px);
}

.page-about .about-head .eyebrow {
  margin: 0;
  color: var(--c-red-deep);
}

.page-about .about-head h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 42px);
  line-height: 1.18;
  color: var(--c-ink);
}

.page-about .about-head p:last-child {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-brown);
}

/* 起点 */
.page-about .origin-grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

.page-about .origin-text h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 40px);
  line-height: 1.2;
  color: var(--c-ink);
}

.page-about .origin-text .eyebrow {
  margin: 0;
  color: var(--c-red-deep);
}

.page-about .origin-text p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-brown);
}

.page-about .about-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--c-gold-soft);
}

.page-about .about-facts li {
  position: relative;
  padding: 12px 0 12px 20px;
  border-bottom: 1px solid var(--c-gold-soft);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-about .about-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 8px;
  background: var(--c-gold);
  border: 1px solid var(--c-ink);
}

.page-about .about-facts strong {
  display: block;
  font-weight: 600;
  color: var(--c-red-deep);
}

.page-about .origin-figure,
.page-about .cover-figure,
.page-about .lib-figure {
  margin: 0;
}

/* 时间轴 */
.page-about .about-stages {
  background: var(--c-cream-lt);
  border-top: var(--bw) solid var(--c-ink);
  border-bottom: var(--bw) solid var(--c-ink);
}

.page-about .tl-index {
  position: sticky;
  top: 8px;
  z-index: 4;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 0 12px;
  -webkit-overflow-scrolling: touch;
  background: linear-gradient(180deg, var(--c-cream-lt) 76%, rgba(251, 247, 239, 0));
}

.page-about .tl-index a {
  flex: 0 0 auto;
  padding: 7px 13px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-decoration: none;
  color: var(--c-ink);
  background: var(--c-cream);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-pill);
}

.page-about .tl-index a[aria-current="true"] {
  color: var(--c-cream-lt);
  background: var(--c-red);
  border-color: var(--c-red-deep);
}

.page-about .tl {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  padding: 16px 0 24px 26px;
  border-left: 3px solid var(--c-ink);
}

.page-about .tl-item:last-child {
  padding-bottom: 8px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -9.5px;
  top: 22px;
  width: 16px;
  height: 16px;
  background: var(--c-gold);
  border: 3px solid var(--c-ink);
  border-radius: 50%;
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 6.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-red-deep);
}

.page-about .tl-body h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 3.4vw, 24px);
  line-height: 1.3;
  color: var(--c-ink);
}

.page-about .tl-body p {
  margin: 8px 0 12px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-brown);
}

/* 覆盖 */
.page-about .cover-grid {
  display: grid;
  gap: clamp(18px, 3.4vw, 30px);
  align-items: start;
}

.page-about .dotmap {
  padding: clamp(16px, 3vw, 22px);
  background: var(--c-teal);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-hard);
}

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

.page-about .dotmap-svg circle {
  fill: var(--c-gold);
  stroke: var(--c-ink);
  stroke-width: 1.5;
}

.page-about .dotmap-svg circle:nth-child(n + 12) {
  fill: var(--c-red);
}

.page-about .dotmap-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(232, 213, 175, 0.35);
  font-size: 12.5px;
  color: var(--c-gold-soft);
}

.page-about .dotmap-key {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--c-ink);
}

.page-about .dot--cluster {
  background: var(--c-gold);
}

.page-about .dot--city {
  background: var(--c-red);
}

.page-about .cover-side {
  display: grid;
  gap: 16px;
}

.page-about .city-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .city-chip {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  background: var(--c-cream-lt);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-s);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .city-chip:hover,
.page-about .city-chip:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-mid);
}

.page-about .city-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-about .city-sub {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--c-brown);
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  padding: clamp(16px, 3vw, 22px);
}

.page-about .team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-red);
}

.page-about .team-card h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--c-ink);
}

.page-about .team-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-brown);
}

.page-about .team-note {
  margin: clamp(16px, 3vw, 22px) 0 0;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-ink);
  background: var(--c-gold-soft);
  border-left: 5px solid var(--c-red);
  border-radius: 0 var(--r-s) var(--r-s) 0;
}

/* 资料库 */
.page-about .about-library {
  background: var(--c-cream-lt);
  border-top: var(--bw) solid var(--c-ink);
}

.page-about .lib-grid {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
  align-items: start;
}

.page-about .lib-main .eyebrow {
  margin: 0;
  color: var(--c-red-deep);
}

.page-about .lib-main h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.2;
  color: var(--c-ink);
}

.page-about .lib-main > p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-brown);
}

.page-about .lib-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 0;
}

.page-about .lib-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 14px;
  background: var(--c-cream);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-s);
}

.page-about .lib-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-teal);
}

.page-about .lib-label {
  font-size: 12.5px;
  color: var(--c-brown);
}

.page-about .gov {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .gov details {
  background: var(--c-cream);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-mid);
  overflow: hidden;
}

.page-about .gov summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
}

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

.page-about .gov summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-red);
}

.page-about .gov details[open] summary::after {
  content: "−";
}

.page-about .gov details p {
  margin: 0;
  padding: 0 16px 15px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-brown);
}

.page-about .lib-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 18px 0 0;
  font-size: 14px;
}

.page-about .lib-links a {
  color: var(--c-red-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--c-gold);
  padding-bottom: 2px;
}

.page-about .lib-links a:hover,
.page-about .lib-links a:focus-visible {
  color: var(--c-indigo);
  border-bottom-color: var(--c-indigo);
}

/* 合作生态 */
.page-about .audit-grid {
  display: grid;
  gap: 12px;
}

.page-about .audit-card {
  position: relative;
  padding: 18px 18px 18px 20px;
  background: var(--c-cream-lt);
  border: var(--bw) solid var(--c-ink);
  border-left: 6px solid var(--c-gold);
  border-radius: var(--r-s);
}

.page-about .audit-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-terra);
}

.page-about .audit-card h3 {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--c-ink);
}

.page-about .audit-card p {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-brown);
}

.page-about .honor {
  display: grid;
  gap: 10px;
  align-items: start;
  margin-top: clamp(18px, 3.4vw, 26px);
  padding: clamp(16px, 3vw, 24px);
  background: var(--c-gold-soft);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-hard);
}

.page-about .honor .tag {
  justify-self: start;
}

.page-about .honor p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-ink);
}

/* 理念与联系 */
.page-about .idea-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.4vw, 46px);
  background: var(--c-teal);
  border: var(--bw) solid var(--c-ink);
  border-radius: var(--r-l);
  box-shadow: var(--shadow-hard);
}

.page-about .idea-panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 220px;
  height: 220px;
  background: var(--c-red);
  opacity: 0.22;
  transform: rotate(24deg);
  border-radius: 30% 50% 24% 44%;
  pointer-events: none;
}

.page-about .idea-panel > * {
  position: relative;
  z-index: 1;
}

.page-about .idea-panel .eyebrow {
  margin: 0;
  color: var(--c-gold-soft);
}

.page-about .idea-panel h2 {
  margin: 10px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.8vw, 40px);
  line-height: 1.22;
  color: var(--c-cream-lt);
}

.page-about .idea-panel p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--c-gold-soft);
}

.page-about .idea-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3.6vw, 28px);
}

/* 平板及桌面 */
@media (min-width: 640px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .honor {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 16px;
  }
}

@media (min-width: 860px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .origin-figure {
    margin-top: 28px;
  }

  .page-about .tl-index {
    top: calc(var(--nav-h) * 0.2 + 10px);
    padding-bottom: 16px;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 26px;
    padding: 20px 0 26px 36px;
  }

  .page-about .tl-item::before {
    top: 30px;
  }

  .page-about .tl-body p {
    margin-bottom: 14px;
  }

  .page-about .cover-grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }

  .page-about .cover-side {
    gap: 20px;
  }

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

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

  .page-about .lib-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .lib-figure {
    position: sticky;
    top: calc(var(--nav-h) * 0.2 + 20px);
  }

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

@media (min-width: 1080px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-lede {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .city-chip {
    transition: none;
  }

  .page-about .city-chip:hover,
  .page-about .city-chip:focus-within {
    transform: none;
  }
}
<<<END>>>