.page-about {
  background: var(--space-950);
  color: var(--text-primary);
  font-family: var(--font-body);
}

.page-about .about-wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px var(--gutter) 88px;
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

/* ---------- 章节索引轴 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .rail-label {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.page-about .rail-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--line-600) transparent;
  -webkit-overflow-scrolling: touch;
}

.page-about .rail-nav::-webkit-scrollbar {
  height: 4px;
}

.page-about .rail-nav::-webkit-scrollbar-thumb {
  background: var(--line-600);
  border-radius: 2px;
}

.page-about .rail-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-600);
  border-radius: 999px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.8125rem;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--teal-300);
  border-color: var(--teal-400);
  outline: none;
}

.page-about .rail-dot,
.page-about .rail-num {
  display: none;
}

/* ---------- 首屏 ---------- */
.page-about .about-main {
  min-width: 0;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-family: var(--font-num);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-600);
}

.page-about .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--teal-300);
}

.page-about .about-hero {
  padding-bottom: 8px;
}

.page-about .about-h1 {
  margin: 10px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.005em;
  color: var(--text-primary);
  max-width: 20ch;
}

.page-about .about-lede {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.page-about .hero-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  background: var(--overlay);
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(3, 6, 13, 0.1) 0%, rgba(3, 6, 13, 0.78) 100%);
  pointer-events: none;
}

.page-about .hero-cap {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 16px;
  z-index: 1;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-600);
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px 18px;
  background: var(--space-900);
}

.page-about .hero-stat-num {
  font-family: var(--font-num);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 700;
  color: var(--teal-400);
  letter-spacing: 0.02em;
}

.page-about .hero-stat:nth-child(2) .hero-stat-num {
  color: var(--orange-500);
}

.page-about .hero-stat-label {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ---------- 故事章节 ---------- */
.page-about .story-section {
  padding: 48px 0 8px;
  border-top: 1px solid var(--line-600);
  margin-top: 44px;
}

.page-about .story-section--tint {
  position: relative;
  padding: 44px 20px 20px;
  margin-top: 48px;
  border-top: 1px solid var(--line-600);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--space-900) 0%, var(--space-950) 100%);
}

.page-about .story-section--tint::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 56px;
  height: 2px;
  background: var(--teal-400);
}

.page-about .story-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0.008em;
  color: var(--text-primary);
  max-width: 24ch;
}

.page-about .story-body p {
  max-width: 68ch;
  margin: 0 0 18px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

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

.page-about .story-link-row {
  margin: 26px 0 0;
}

/* ---------- 工作流程 ---------- */
.page-about .flow-list {
  margin: 30px 0 0;
  padding: 0 0 0 28px;
  list-style: none;
  border-left: 1px solid var(--line-600);
  display: grid;
  gap: 24px;
}

.page-about .flow-item {
  position: relative;
  max-width: 62ch;
}

.page-about .flow-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal-400);
  box-shadow: 0 0 0 4px rgba(57, 245, 200, 0.12);
}

.page-about .flow-title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .flow-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ---------- 图文块 ---------- */
.page-about .story-media {
  position: relative;
  margin: 32px 0 0;
  overflow: hidden;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  background: var(--overlay);
}

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

.page-about .story-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(3, 6, 13, 0) 40%, rgba(3, 6, 13, 0.82) 100%);
  pointer-events: none;
}

.page-about .media-cap {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 14px;
  z-index: 1;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ---------- 归档关系 ---------- */
.page-about .archive-block {
  display: grid;
  gap: 22px;
  margin-top: 30px;
  padding: 20px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  background: var(--panel-800);
}

.page-about .archive-map {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
}

.page-about .archive-map .am-path {
  fill: none;
  stroke: var(--line-600);
  stroke-width: 1;
}

.page-about .archive-map .am-node {
  fill: var(--teal-400);
}

.page-about .archive-map .am-node--orange {
  fill: var(--orange-500);
}

.page-about .archive-map .am-label {
  fill: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 11px;
}

.page-about .archive-notes {
  display: grid;
  gap: 14px;
}

.page-about .archive-note {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-about .archive-note .tag {
  margin-right: 8px;
  vertical-align: 1px;
}

/* ---------- 发展阶段 ---------- */
.page-about .era-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line-600);
}

.page-about .era {
  position: relative;
  padding: 22px 18px 26px;
  background: var(--space-950);
}

.page-about .era-idx {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--teal-400);
  margin-bottom: 10px;
}

.page-about .era-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .era-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ---------- 团队 ---------- */
.page-about .crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .crew {
  padding: 20px 18px 22px;
  border: 1px solid var(--line-600);
  border-left: 2px solid var(--teal-400);
  border-radius: var(--radius-sm);
  background: var(--space-900);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .crew:hover {
  border-color: var(--teal-400);
  transform: translateY(-2px);
}

.page-about .crew-role {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal-300);
}

.page-about .crew-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.page-about .ecosystem {
  margin-top: 32px;
  padding: 24px 20px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel-800) 0%, var(--space-950) 100%);
}

.page-about .eco-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .eco-text {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

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

/* ---------- 长期维护 ---------- */
.page-about .maintain-list {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-600);
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .maintain-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 18px;
  background: var(--space-950);
}

.page-about .maintain-key {
  font-family: var(--font-num);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange-500);
}

.page-about .maintain-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.page-about .next-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* ---------- 联系条 ---------- */
.page-about .contact-strip {
  margin-top: 30px;
  padding: 22px 20px 24px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius);
  background: var(--panel-800);
}

.page-about .contact-strip-title {
  margin: 0 0 14px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .contact-strip-list {
  display: grid;
  gap: 10px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.page-about .contact-strip-list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.page-about .contact-key {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.page-about .contact-val {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-primary);
  word-break: break-word;
}

.page-about .contact-strip-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-600);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .crew:hover {
    transform: none;
  }
}

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

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

  .page-about .archive-block {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    padding: 24px;
  }

  .page-about .maintain-item {
    grid-template-columns: 110px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
    padding: 18px 20px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-wrap {
    padding-top: 36px;
    padding-bottom: 112px;
  }

  .page-about .about-grid {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .rail-nav {
    display: grid;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line-600);
  }

  .page-about .rail-link {
    display: grid;
    grid-template-columns: 10px minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    padding: 11px 0 11px 16px;
    margin-left: -1px;
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0;
    font-size: 0.9375rem;
    white-space: normal;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
  }

  .page-about .rail-link:hover,
  .page-about .rail-link:focus-visible {
    border-left-color: var(--teal-400);
    background: linear-gradient(90deg, rgba(57, 245, 200, 0.09), transparent 80%);
  }

  .page-about .rail-dot {
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--line-600);
    transition: background 0.2s var(--ease);
  }

  .page-about .rail-link:hover .rail-dot {
    background: var(--teal-400);
  }

  .page-about .rail-num {
    display: block;
    font-family: var(--font-num);
    font-size: 0.6875rem;
    color: var(--text-muted);
  }

  .page-about .story-section {
    padding-top: 56px;
    margin-top: 52px;
  }

  .page-about .story-section--tint {
    padding: 48px 32px 28px;
    margin-top: 56px;
  }

  .page-about .story-section--tint::before {
    left: 32px;
  }

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

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

  .page-about .archive-block {
    grid-template-columns: 340px minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .contact-strip {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 8px 32px;
    align-items: start;
  }

  .page-about .contact-strip-title {
    grid-column: 1;
    margin-bottom: 0;
    font-family: var(--font-display);
    font-size: 1.25rem;
  }

  .page-about .contact-strip-list {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-bottom: 0;
  }

  .page-about .contact-strip-note {
    grid-column: 1;
  }
}

@media (min-width: 1200px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</final_solution>