.page-about {
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  background: var(--bone);
  border-bottom: 1px solid var(--hairline);
  padding-block: 0.6rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--indigo);
  color: var(--prayer);
  padding-block: clamp(2rem, 5vw, 4rem) clamp(1.75rem, 4.5vw, 3.5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(to right, rgba(201, 164, 92, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 164, 92, 0.1) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  -webkit-mask-image: radial-gradient(125% 95% at 18% 0%, #000 28%, transparent 84%);
  mask-image: radial-gradient(125% 95% at 18% 0%, #000 28%, transparent 84%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: 52%;
  height: 155%;
  z-index: -1;
  background: linear-gradient(158deg, rgba(62, 124, 116, 0.3), rgba(201, 164, 92, 0.13) 58%, transparent 80%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: center;
}

.page-about .hero-copy {
  order: 1;
  min-width: 0;
}

.page-about .hero-figure {
  order: 2;
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--sand-line);
  background: var(--night);
}

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  opacity: 0.86;
}

.page-about .hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(27, 42, 74, 0.06), rgba(14, 23, 43, 0.58) 78%);
  pointer-events: none;
}

.page-about .hero-figure-cap {
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.7rem;
  z-index: 1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: rgba(250, 247, 240, 0.74);
}

.page-about .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .hero-eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--sand);
}

.page-about .about-h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 5.4vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--prayer);
  overflow-wrap: break-word;
}

.page-about .hero-lede {
  max-width: 46ch;
  margin: 0 0 1.5rem;
  font-size: clamp(0.9375rem, 2.1vw, 1.0625rem);
  line-height: 1.8;
  color: rgba(243, 239, 230, 0.82);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  border: 1px solid var(--hairline-light);
  background: var(--hairline-light);
}

.page-about .hero-stats li {
  padding: 0.7rem 0.85rem;
  background: rgba(14, 23, 43, 0.58);
}

.page-about .hero-stat-num {
  display: block;
  font-family: var(--font-num);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--sand);
}

.page-about .hero-stat-label {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: rgba(243, 239, 230, 0.66);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .hero-actions .btn-outline {
  border-color: rgba(243, 239, 230, 0.36);
  color: var(--bone);
}

.page-about .hero-actions .btn-outline:hover,
.page-about .hero-actions .btn-outline:focus-visible {
  border-color: var(--sand);
  color: var(--sand);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-toc {
  background: var(--night);
  border-top: 1px solid var(--sand-line);
  border-bottom: 1px solid var(--hairline-light);
}

.page-about .about-toc-list {
  display: flex;
  gap: 1.4rem;
  margin: 0;
  padding: 0.8rem 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc-link {
  display: inline-block;
  padding: 0.15rem 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: rgba(243, 239, 230, 0.62);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-toc-link:hover,
.page-about .about-toc-link:focus-visible {
  color: var(--sand);
  border-bottom-color: var(--sand);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-flow {
  padding-block: clamp(0.5rem, 2vw, 1.25rem) clamp(2rem, 5vw, 4rem);
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  padding-block: clamp(1.9rem, 4.5vw, 3.4rem);
  border-top: 1px solid var(--hairline);
  scroll-margin-top: 96px;
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  min-width: 0;
}

.page-about .about-index {
  font-family: var(--font-num);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--sand);
}

.page-about .about-rail-year {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--stone);
  white-space: nowrap;
}

.page-about .about-col {
  min-width: 0;
}

.page-about .about-title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.4vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--indigo);
}

.page-about .about-lede {
  max-width: 62ch;
  margin: 0 0 1.2rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--stone);
}

.page-about .about-text p {
  max-width: 66ch;
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink);
}

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

/* ---------- 四轴卡片 ---------- */
.page-about .axis-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.page-about .axis-card {
  position: relative;
  padding: 1rem 1.1rem;
  background: var(--prayer);
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--turquoise);
  box-shadow: var(--card-shadow);
}

.page-about .axis-card:nth-child(2) {
  border-left-color: var(--lapis);
}

.page-about .axis-card:nth-child(3) {
  border-left-color: var(--sand);
}

.page-about .axis-card:nth-child(4) {
  border-left-color: var(--vermilion);
}

.page-about .axis-key {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-about .axis-name {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--indigo);
}

.page-about .axis-desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--stone);
}

/* ---------- 版本治理 ---------- */
.page-about .gov-panel {
  position: relative;
  overflow: hidden;
  margin-top: 1.25rem;
  padding: clamp(1.15rem, 3vw, 1.8rem);
  background: var(--night);
  border: 1px solid var(--sand-line);
  color: var(--prayer);
}

.page-about .gov-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(201, 164, 92, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 164, 92, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

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

.page-about .gov-panel-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .gov-list {
  display: grid;
  gap: 0.85rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .gov-item {
  display: grid;
  grid-template-columns: 4.75rem minmax(0, 1fr);
  gap: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--hairline-light);
}

.page-about .gov-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .gov-item-key {
  padding-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--sand);
  white-space: nowrap;
}

.page-about .gov-item-body strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--prayer);
}

.page-about .gov-item-body p {
  margin: 0.3rem 0 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(243, 239, 230, 0.74);
}

.page-about .gov-figure {
  margin: 1.25rem 0 0;
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--night);
}

.page-about .gov-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.85;
}

.page-about .gov-figure-cap {
  padding: 0.55rem 0.85rem;
  border-top: 1px solid var(--hairline-light);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: rgba(243, 239, 230, 0.6);
}

/* ---------- 团队条形图 ---------- */
.page-about .team-bars {
  display: grid;
  gap: 0.9rem;
  margin: 1.25rem 0 1.25rem;
  padding: 0;
  list-style: none;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 5.25rem minmax(0, 1fr) 2rem;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.page-about .team-bar-label {
  color: var(--indigo);
  letter-spacing: 0.03em;
}

.page-about .team-bar-track {
  display: block;
  height: 10px;
  border-radius: 1px;
  background: rgba(27, 42, 74, 0.09);
  overflow: hidden;
}

.page-about .team-bar-fill {
  display: block;
  width: var(--w, 0%);
  height: 100%;
  border-radius: 1px;
  background: var(--turquoise);
}

.page-about .team-bar:nth-child(2) .team-bar-fill {
  background: var(--lapis);
}

.page-about .team-bar:nth-child(3) .team-bar-fill {
  background: var(--sand);
}

.page-about .team-bar:nth-child(4) .team-bar-fill {
  background: var(--vermilion);
}

.page-about .team-bar-num {
  text-align: right;
  font-weight: 700;
  color: var(--indigo);
}

.page-about .team-figure {
  margin: 1.25rem 0 0;
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--prayer);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .team-figure-cap {
  padding: 0.55rem 0.85rem;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--stone);
}

/* ---------- 协作场景 ---------- */
.page-about .scene-list {
  display: grid;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.page-about .scene-card {
  background: var(--prayer);
  border: 1px solid var(--hairline);
  box-shadow: var(--card-shadow);
}

.page-about .scene-card[open] {
  border-color: var(--hairline-strong);
}

.page-about .scene-summary {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.8rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--indigo);
}

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

.page-about .scene-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 1rem;
  color: var(--sand-deep);
}

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

.page-about .scene-tag {
  flex: none;
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--sand-line);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--sand-deep);
}

.page-about .scene-name {
  min-width: 0;
}

.page-about .scene-body {
  padding: 0 1rem 1rem;
}

.page-about .scene-body p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 1.25rem 0 0;
  padding: 0 0 0 1.5rem;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  bottom: 0.45rem;
  width: 1px;
  background: linear-gradient(180deg, var(--sand), rgba(201, 164, 92, 0.14));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 1.45rem;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.55rem;
  width: 7px;
  height: 7px;
  transform: translateX(-3px);
  border-radius: 50%;
  background: var(--sand);
  box-shadow: 0 0 0 3px var(--bone);
}

.page-about .tl-year {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sand-deep);
}

.page-about .tl-heading {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--indigo);
}

.page-about .tl-body p {
  max-width: 60ch;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 3.5vw, 2.15rem);
  background: var(--indigo);
  border: 1px solid var(--sand-line);
  color: var(--prayer);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(201, 164, 92, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 164, 92, 0.09) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

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

.page-about .cta-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--prayer);
}

.page-about .cta-text {
  max-width: 56ch;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(243, 239, 230, 0.8);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.15rem;
}

.page-about .about-links {
  display: grid;
  gap: 0.5rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-links a {
  display: block;
  padding: 0.65rem 0.85rem;
  background: var(--prayer);
  border: 1px solid var(--hairline);
  font-size: 0.875rem;
  color: var(--indigo);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-links a:hover,
.page-about .about-links a:focus-visible {
  border-color: var(--sand);
  color: var(--sand-deep);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 640px) {
  .page-about .axis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(1.75rem, 4vw, 3rem);
  }

  .page-about .hero-figure {
    order: 1;
  }

  .page-about .hero-copy {
    order: 2;
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 0 clamp(1.5rem, 4vw, 3.25rem);
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .page-about .about-lede {
    font-size: 1.0625rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc-link,
  .page-about .about-links a {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}