.page-about {
  --about-tint-indigo: rgba(36, 42, 90, 0.5);
  --about-tint-wine: rgba(110, 31, 53, 0.42);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.7;
  padding-bottom: 8px;
}

.page-about a {
  color: inherit;
}

.page-about :focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 6px 0 40px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -90px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 242, 192, 0.16), rgba(59, 242, 192, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: 26px;
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal-soft);
}

.page-about h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 7.4vw, 54px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 245, 233, 0.82);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 按钮 ---------- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 14px 4px 14px 4px;
  font-size: 14px;
  text-decoration: none;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .btn--primary {
  background: var(--ember);
  color: var(--ink-900);
  font-weight: 600;
}

.page-about .btn--primary:hover {
  background: var(--amber);
  transform: translateY(-2px);
}

.page-about .btn--ghost {
  border-color: var(--line);
  color: var(--paper);
}

.page-about .btn--ghost:hover {
  border-color: var(--signal);
  color: var(--signal-soft);
  transform: translateY(-2px);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 22px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
}

.page-about .about-figure--hero img {
  aspect-ratio: 14 / 9;
}

.page-about .about-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 跨页栅格 ---------- */
.page-about .about-spread {
  display: grid;
  gap: 26px;
  padding: 22px 0 10px;
}

/* ---------- 左侧索引栏 ---------- */
.page-about .about-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .rail-title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.page-about .rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 3px 0;
  font-size: 13px;
  text-decoration: none;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.page-about .rail-link:hover {
  color: var(--signal-soft);
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: 28px 0 32px;
  border-top: 1px solid var(--line);
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .chapter-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .chapter h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.8vw, 33px);
  line-height: 1.24;
  letter-spacing: 0.01em;
}

.page-about .chapter p {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 245, 233, 0.8);
}

.page-about .inline-link {
  color: var(--signal-soft);
  text-decoration: underline;
  text-decoration-color: rgba(59, 242, 192, 0.45);
  text-underline-offset: 4px;
}

.page-about .inline-link:hover {
  color: var(--signal);
  text-decoration-color: var(--signal);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 24px 2px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(59, 242, 192, 0.14);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: 0.08em;
  color: var(--amber);
  transition: color var(--dur) var(--ease);
}

.page-about .tl-item:hover .tl-year {
  color: var(--signal-soft);
}

.page-about .tl-title {
  display: block;
  margin-top: 2px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .tl-text {
  margin: 6px 0 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  margin: 20px 0 0;
  padding: 10px 0 10px 14px;
  border-left: 2px solid var(--ember);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-note:hover,
.page-about .about-note:focus-within {
  border-left-color: var(--signal);
  color: var(--paper);
}

/* ---------- 目录式列表 ---------- */
.page-about .index-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .index-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 13px 14px;
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-radius: 14px 4px 14px 4px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .index-row:hover {
  transform: translateY(-2px);
  border-color: var(--signal);
}

.page-about .index-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .index-row h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.page-about .index-row p {
  margin: 3px 0 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 数字 ---------- */
.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.page-about .stat-card {
  padding: 16px 14px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: 18px 4px 18px 4px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .stat-card:hover {
  border-color: rgba(59, 242, 192, 0.55);
}

.page-about .stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(25px, 6vw, 36px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--signal);
}

.page-about .stat-label {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 表格 ---------- */
.page-about .table-wrap {
  margin-top: 20px;
  overflow-x: auto;
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-radius: 16px 4px 16px 4px;
}

.page-about .data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13.5px;
}

.page-about .data-table caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .data-table th {
  padding: 11px 14px;
  text-align: left;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal-soft);
  background: rgba(31, 90, 69, 0.3);
  border-bottom: 1px solid var(--line);
}

.page-about .data-table td {
  padding: 12px 14px;
  vertical-align: top;
  line-height: 1.7;
  color: rgba(242, 245, 233, 0.86);
  border-bottom: 1px solid rgba(31, 90, 69, 0.52);
}

.page-about .data-table td:first-child {
  font-family: var(--font-mono);
  white-space: nowrap;
  color: var(--amber);
}

.page-about .data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .data-table tbody tr:hover {
  background: rgba(59, 242, 192, 0.06);
}

/* ---------- 色块章节 ---------- */
.page-about .chapter--tint {
  border-top: 0;
  padding: 26px 18px 30px;
  border-radius: 26px 8px 26px 8px;
}

.page-about .chapter--indigo {
  background: linear-gradient(155deg, var(--about-tint-indigo), rgba(7, 28, 23, 0.15) 72%);
  box-shadow: inset 0 0 0 1px rgba(59, 242, 192, 0.16);
}

.page-about .chapter--wine {
  background: linear-gradient(155deg, var(--about-tint-wine), rgba(7, 28, 23, 0.12) 74%);
  box-shadow: inset 0 0 0 1px rgba(255, 138, 61, 0.18);
}

/* ---------- 角色 ---------- */
.page-about .role-grid {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .role-item {
  padding: 15px 16px;
  background: var(--ink-800);
  border-left: 3px solid var(--signal);
  border-radius: 4px 16px 4px 16px;
  transition: transform var(--dur) var(--ease), border-left-color var(--dur) var(--ease);
}

.page-about .role-item:hover {
  transform: translateY(-2px);
  border-left-color: var(--ember);
}

.page-about .role-item h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
}

.page-about .role-item p {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 工作原则 ---------- */
.page-about .principles {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .principles li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 245, 233, 0.85);
}

.page-about .principles li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--ember);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin: 34px 0 56px;
  padding: 24px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: 28px 8px 28px 8px;
}

.page-about .cta-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 27px);
  line-height: 1.3;
}

.page-about .cta-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta {
    padding: 28px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 14px 0 56px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 46px;
  }

  .page-about .about-spread {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 46px;
    padding-top: 34px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 24px;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .rail-block + .rail-block {
    margin-top: 22px;
  }

  .page-about .rail-list {
    display: block;
  }

  .page-about .rail-list li + li {
    margin-top: 5px;
  }

  .page-about .chapter {
    padding: 34px 0 40px;
  }

  .page-about .chapter--tint {
    padding: 32px 30px 36px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 34px;
    margin-top: 40px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-spread {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-figure {
    margin-top: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }

  .page-about .btn:hover,
  .page-about .index-row:hover,
  .page-about .role-item:hover {
    transform: none;
  }
}
<<<END>>>