.page-about {
  --about-pad: clamp(2.5rem, 7vw, 5rem);
  --about-line: rgba(242, 231, 211, 0.14);
  --about-line-soft: rgba(242, 231, 211, 0.08);
  background: var(--ink-900);
  color: var(--frost);
  overflow-x: clip;
}

/* 面包屑 */
.page-about .about-crumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(246, 241, 230, 0.58);
}
.page-about .about-crumb a {
  color: rgba(246, 241, 230, 0.78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-about .about-crumb a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.page-about .about-crumb-sep {
  color: var(--amber);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(1.75rem, 4vw, 3rem) var(--gutter) var(--about-pad);
}
.page-about .about-hero-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}
.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin: 0.6rem 0 1.25rem;
}
.page-about .about-lede {
  color: rgba(246, 241, 230, 0.82);
  max-width: 36ch;
}
.page-about .about-hero-facts {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 1.15rem 0 0;
  display: grid;
  gap: 0.6rem;
  border-top: 1px solid var(--about-line);
  font-size: var(--fs-sm);
  color: rgba(246, 241, 230, 0.72);
}
.page-about .about-hero-facts li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.page-about .about-dot {
  width: 7px;
  height: 7px;
  background: var(--amber);
  transform: rotate(45deg);
  flex: none;
}
.page-about .about-hero-figure {
  margin: 0;
  border: 1px solid var(--about-line);
  background: var(--ink-800);
  position: relative;
}
.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(227, 163, 60, 0.28);
  pointer-events: none;
}
.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.page-about .figure-caption {
  display: block;
  padding: 0.7rem 0.9rem;
  font-size: 0.75rem;
  line-height: 1.6;
  color: rgba(246, 241, 230, 0.6);
  border-top: 1px solid var(--about-line);
}

/* 章节索引 */
.page-about .about-index {
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  background: var(--ink-800);
}
.page-about .about-index-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.35rem;
  white-space: nowrap;
}
.page-about .about-index-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.95rem 0.85rem;
  font-size: var(--fs-sm);
  color: rgba(246, 241, 230, 0.7);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--amber);
}

/* 通用章节 */
.page-about .about-sec {
  padding: var(--about-pad) var(--gutter);
  border-bottom: 1px solid var(--about-line-soft);
}
.page-about .about-sec-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}
.page-about .about-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(0.85rem, 2vw, 1.5rem);
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}
.page-about .about-plate {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(2.5rem, 7vw, 4rem);
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--amber);
  flex: none;
}
.page-about .about-head-text h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.25;
  margin: 0.35rem 0 0;
}
.page-about .about-note {
  color: rgba(246, 241, 230, 0.6);
  font-size: var(--fs-sm);
  margin: -0.75rem 0 1.5rem;
}

/* 01 起点 */
.page-about .about-cols {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}
.page-about .about-col p {
  margin: 0;
  color: rgba(246, 241, 230, 0.8);
}
.page-about .link-more {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 163, 60, 0.5);
}
.page-about .link-more:hover {
  border-bottom-color: var(--amber);
}

/* 02 时间线 */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.35rem;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(227, 163, 60, 0.12) 100%);
}
.page-about .about-tl-item {
  position: relative;
  padding-left: 1.85rem;
  margin-bottom: 0.85rem;
}
.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 0.15rem;
  top: 1.45rem;
  width: 10px;
  height: 10px;
  background: var(--ink-900);
  border: 1px solid var(--amber);
  transform: rotate(45deg);
}
.page-about .about-tl-card {
  background: rgba(27, 42, 80, 0.55);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.page-about .about-tl-card:hover {
  border-color: rgba(227, 163, 60, 0.55);
  background: rgba(27, 42, 80, 0.78);
}
.page-about .about-tl-sum {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  position: relative;
}
.page-about .about-tl-sum::-webkit-details-marker {
  display: none;
}
.page-about .about-tl-sum::after {
  content: "+";
  margin-left: auto;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--amber);
  flex: none;
}
.page-about .about-tl-card[open] .about-tl-sum::after {
  content: "−";
}
.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--amber);
  flex: none;
  padding-top: 0.1rem;
}
.page-about .about-tl-head {
  display: grid;
  gap: 0.3rem;
}
.page-about .about-tl-name {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  line-height: 1.3;
}
.page-about .about-tl-line {
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(246, 241, 230, 0.68);
}
.page-about .about-tl-detail {
  padding: 0 1.1rem 1.1rem 1.1rem;
}
.page-about .about-tl-detail p {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--about-line);
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(246, 241, 230, 0.78);
}

/* 03 服务版图 */
.page-about .about-stats {
  list-style: none;
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .about-stat {
  background: var(--ink-800);
  padding: 1.2rem 1rem;
  display: grid;
  gap: 0.35rem;
}
.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 2.9rem);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.01em;
}
.page-about .about-stat-num em {
  font-style: normal;
  font-size: 0.95rem;
  margin-left: 0.2rem;
  color: var(--amber-soft);
}
.page-about .about-stat-label {
  font-size: var(--fs-sm);
  color: rgba(246, 241, 230, 0.68);
}
.page-about .about-reach-figure {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--about-line);
  background: var(--ink-800);
}
.page-about .about-reach-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}
.page-about .about-legend {
  display: grid;
  gap: 0.75rem;
}
.page-about .about-legend-item {
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--sage);
  border-radius: var(--radius);
  padding: 0.95rem 1rem;
  transition: border-left-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.page-about .about-legend-item:hover {
  border-left-color: var(--amber);
  background: rgba(227, 163, 60, 0.07);
  transform: translateY(-2px);
}
.page-about .about-legend-item h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  color: var(--frost);
}
.page-about .about-legend-item p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: rgba(246, 241, 230, 0.72);
}

/* 04 团队 */
.page-about .about-team-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}
.page-about .about-team-cards {
  display: grid;
  gap: 0.85rem;
}
.page-about .about-archive {
  padding: 1.15rem 1.25rem;
  border-left: 3px solid var(--amber);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-archive:hover {
  transform: translateY(-3px);
  box-shadow: 6px 10px 0 rgba(0, 0, 0, 0.32);
}
.page-about .about-archive h3 {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  margin: 0.55rem 0 0.45rem;
}
.page-about .about-archive p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
}
.page-about .about-team-figure {
  margin: 0;
  border: 1px solid var(--about-line);
  background: var(--ink-800);
  align-self: start;
}
.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-about .about-aside {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding-top: 1.15rem;
  border-top: 1px solid var(--about-line);
  color: rgba(246, 241, 230, 0.72);
  font-size: var(--fs-sm);
  max-width: 62ch;
}

/* 05 治理 */
.page-about .about-gov {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}
.page-about .about-gov-main p {
  color: rgba(246, 241, 230, 0.78);
  margin: 0 0 1.25rem;
}
.page-about .about-gov-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  counter-reset: gov;
}
.page-about .about-gov-steps li {
  border-top: 1px solid var(--about-line);
  padding-top: 0.85rem;
}
.page-about .about-gov-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 0.35rem;
}
.page-about .about-gov-steps p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(246, 241, 230, 0.74);
}
.page-about .about-gov-side {
  padding: 1.35rem 1.4rem;
}
.page-about .about-gov-side h3 {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  margin: 0 0 0.9rem;
}
.page-about .about-gov-list {
  margin: 0;
  display: grid;
  gap: 0.85rem;
}
.page-about .about-gov-list div {
  border-top: 1px solid var(--line-light);
  padding-top: 0.7rem;
}
.page-about .about-gov-list div:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .about-gov-list dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--sage-deep);
  margin-bottom: 0.25rem;
}
.page-about .about-gov-list dd {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
}

/* 06 接下来的方向 */
.page-about .about-next {
  background-image: radial-gradient(circle at 12% 0%, rgba(227, 163, 60, 0.14), transparent 55%);
}
.page-about .about-next-grid {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .about-next-item {
  background: var(--ink-900);
  padding: 1.25rem 1.15rem;
}
.page-about .about-next-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--amber);
  letter-spacing: 0.1em;
}
.page-about .about-next-item h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0.5rem 0 0.5rem;
}
.page-about .about-next-item p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(246, 241, 230, 0.72);
}
.page-about .about-cta {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--about-line);
}
.page-about .about-cta p {
  margin: 0 0 1.1rem;
  color: rgba(246, 241, 230, 0.78);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.page-about .about-cta-actions .btn {
  text-decoration: none;
}

/* 中等屏 */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-legend {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-team-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-archive:first-child {
    grid-column: span 2;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.02fr 0.98fr;
  }
  .page-about .about-cols {
    grid-template-columns: 5fr 7fr;
  }
  .page-about .about-legend {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-team-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
  .page-about .about-team-cards {
    grid-template-columns: 1fr;
  }
  .page-about .about-archive:first-child {
    grid-column: auto;
  }
  .page-about .about-gov {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
  .page-about .about-next-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-tl-sum {
    padding: 1.1rem 1.35rem;
  }
  .page-about .about-tl-detail {
    padding: 0 1.35rem 1.25rem 4.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-archive,
  .page-about .about-legend-item,
  .page-about .about-tl-card {
    transition: none;
  }
  .page-about .about-archive:hover,
  .page-about .about-legend-item:hover {
    transform: none;
  }
}
<<<END>>>