.page-about {
  --about-rail-w: 236px;
  --about-gap: clamp(32px, 5vw, 76px);
  background: var(--ink-950);
  color: var(--text-100);
}

/* 顶部纸质裁边装饰条 */
.page-about .about-strip {
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--lime-400) 0 16%,
    var(--orange-500) 16% 24%,
    var(--ink-700) 24% 100%
  );
}

/* ---------- 页首 ---------- */
.page-about .about-head {
  max-width: 880px;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(20px, 3.5vw, 34px);
}

.page-about .about-head h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(29px, 4.6vw, 52px);
  line-height: 1.24;
  letter-spacing: 0.005em;
  margin: 14px 0 0;
  color: var(--text-100);
}

.page-about .about-head__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--mist-300);
}

.page-about .about-head__tags {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 首屏主图 ---------- */
.page-about .about-hero {
  margin: 0 0 clamp(36px, 6vw, 66px);
  position: relative;
}

.page-about .about-hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: var(--edge);
  filter: saturate(0.78) contrast(1.06) brightness(0.92);
}

.page-about .about-hero figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-300);
  letter-spacing: 0.02em;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(34px, 5vw, 56px);
  padding-bottom: clamp(52px, 8vw, 104px);
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: var(--about-gap);
  }
}

/* ---------- 左窄栏 ---------- */
.page-about .about-rail__sticky {
  position: static;
}

@media (min-width: 900px) {
  .page-about .about-rail__sticky {
    position: sticky;
    top: 104px;
  }
}

.page-about .rail-stats {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: var(--edge);
}

@media (min-width: 900px) {
  .page-about .rail-stats {
    grid-template-columns: 1fr;
  }
}

.page-about .rail-stats a {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 15px 14px;
  background: var(--ink-900);
  color: inherit;
  text-decoration: none;
  transition: background var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .rail-stats a:hover,
.page-about .rail-stats a:focus-visible {
  background: var(--ink-800);
  box-shadow: inset 3px 0 0 var(--lime-400);
}

.page-about .rail-stats__num {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text-100);
}

.page-about .rail-stats__num em {
  font-style: normal;
  font-size: 0.52em;
  margin-left: 2px;
  color: var(--mist-300);
}

.page-about .rail-stats__num--lime { color: var(--lime-400); }
.page-about .rail-stats__num--lime em { color: var(--lime-400); opacity: 0.7; }
.page-about .rail-stats__num--orange { color: var(--orange-500); }
.page-about .rail-stats__num--orange em { color: var(--orange-500); opacity: 0.75; }

.page-about .rail-stats__label {
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--mist-300);
  letter-spacing: 0.02em;
}

.page-about .about-rail__hint {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist-300);
  letter-spacing: 0.04em;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-bottom: clamp(42px, 6vw, 70px);
  margin-bottom: clamp(42px, 6vw, 70px);
  border-bottom: 1px solid var(--ink-700);
}

.page-about .about-chapter:last-of-type {
  border-bottom: 0;
}

.page-about .about-chapter .section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .about-chapter .section__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime-400);
  border: 1px solid var(--ink-700);
  padding: 3px 7px;
  border-radius: var(--radius);
}

.page-about .about-chapter .section__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 2.7vw, 30px);
  line-height: 1.32;
  color: var(--text-100);
}

.page-about .about-prose {
  max-width: 62ch;
}

.page-about .about-prose p {
  margin: 0 0 1.05em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-100);
}

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

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

.page-about .about-figure-note {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist-300);
  border-left: 2px solid var(--ink-700);
  padding-left: 14px;
}

/* 引语块 */
.page-about .about-pull {
  margin-top: 26px;
  padding: 22px 24px;
  background: var(--ink-900);
  border: var(--edge);
  border-left: 4px solid var(--lime-400);
  position: relative;
}

.page-about .about-pull::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46px;
  height: 4px;
  background: var(--orange-500);
}

.page-about .about-pull__text {
  margin: 0;
  max-width: 52ch;
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.6;
  color: var(--lime-400);
}

/* ---------- 团队分工表 ---------- */
.page-about .team-scroll {
  margin-top: 24px;
  overflow-x: auto;
  border: var(--edge);
  background: var(--ink-900);
  -webkit-overflow-scrolling: touch;
}

.page-about .team-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .team-table th,
.page-about .team-table td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid var(--ink-700);
  vertical-align: top;
  line-height: 1.65;
}

.page-about .team-table thead th {
  background: var(--ink-800);
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist-300);
  white-space: nowrap;
}

.page-about .team-table tbody th {
  color: var(--lime-400);
  font-weight: 600;
  white-space: nowrap;
}

.page-about .team-table tbody td {
  color: var(--text-100);
}

.page-about .team-table__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--orange-500);
  white-space: nowrap;
}

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

.page-about .team-table tbody tr {
  transition: background var(--dur) ease;
}

.page-about .team-table tbody tr:hover {
  background: var(--ink-800);
}

/* ---------- 复核流程 SVG ---------- */
.page-about .flow-scroll {
  margin-top: 24px;
  overflow-x: auto;
  border: var(--edge);
  background: var(--ink-900);
  padding: 10px 6px;
}

.page-about .verify-flow {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
}

.page-about .vf-box {
  fill: var(--ink-800);
  stroke: var(--ink-700);
  stroke-width: 1;
}

.page-about .vf-box--lime { stroke: var(--lime-400); }
.page-about .vf-box--orange { stroke: var(--orange-500); }

.page-about .vf-label {
  fill: var(--text-100);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  text-anchor: middle;
}

.page-about .vf-sub {
  fill: var(--mist-300);
  font-family: var(--font-sans);
  font-size: 12px;
  text-anchor: middle;
}

.page-about .vf-line {
  stroke: var(--ink-700);
  stroke-width: 2;
  stroke-dasharray: 5 5;
}

.page-about .vf-arrow { fill: var(--ink-700); }
.page-about .vf-dot { fill: var(--lime-400); }

/* ---------- 图文并置 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 36px);
  margin-top: 28px;
  align-items: start;
}

@media (min-width: 780px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
  }
}

.page-about .about-figure {
  margin: 0;
  border: var(--edge);
  background: var(--ink-900);
  padding: 10px;
  box-shadow: 4px 4px 0 rgba(23, 64, 52, 0.55);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.06) brightness(0.92);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist-300);
  letter-spacing: 0.02em;
}

.page-about .about-figure--wide {
  margin-top: 30px;
}

.page-about .about-figure--wide img {
  aspect-ratio: 12 / 7;
}

/* ---------- 更新节奏 ---------- */
.page-about .rhythm-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--ink-700);
}

.page-about .rhythm-item {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .rhythm-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime-400);
  box-shadow: 0 0 0 3px var(--ink-950);
}

.page-about .rhythm-item:nth-child(even)::before {
  background: var(--orange-500);
}

.page-about .rhythm-item__when {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lime-400);
}

.page-about .rhythm-item:nth-child(even) .rhythm-item__when {
  color: var(--orange-500);
}

.page-about .rhythm-item__what {
  display: block;
  margin-top: 6px;
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--text-100);
}

.page-about .rhythm-item__note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist-300);
}

/* ---------- 规模数据块 ---------- */
.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--ink-700);
  border: var(--edge);
  margin-top: 26px;
}

.page-about .scale-cell {
  background: var(--ink-900);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  transition: background var(--dur) ease;
}

.page-about .scale-cell:hover {
  background: var(--ink-800);
}

.page-about .scale-cell--paper {
  background: var(--paper-50);
}

.page-about .scale-cell--paper:hover {
  background: var(--paper-200);
}

.page-about .scale-cell__value {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--lime-400);
}

.page-about .scale-cell__value--orange {
  color: var(--orange-500);
}

.page-about .scale-cell--paper .scale-cell__value {
  color: var(--ink-950);
  font-size: clamp(32px, 4.4vw, 48px);
}

.page-about .scale-cell__value em {
  font-style: normal;
  font-size: 0.44em;
  margin-left: 2px;
}

.page-about .scale-cell__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-300);
  letter-spacing: 0.02em;
}

.page-about .scale-cell--paper .scale-cell__label {
  color: var(--ink-700);
}

/* ---------- 发展节点时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime-400), var(--orange-500), var(--ink-700));
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 34px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink-950);
  border: 2px solid var(--lime-400);
  box-shadow: 0 0 0 3px var(--ink-950);
}

.page-about .timeline__item:nth-child(2)::before {
  border-color: var(--orange-500);
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--lime-400);
  margin-bottom: 6px;
}

.page-about .timeline__item:nth-child(2) .timeline__year {
  color: var(--orange-500);
}

.page-about .timeline__body {
  background: var(--ink-900);
  border: var(--edge);
  padding: 18px 20px;
  transition: transform var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .timeline__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-100);
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-about .timeline__item:hover .timeline__body {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(12px, 2vw, 24px);
  padding: clamp(26px, 4vw, 42px);
  background: var(--ink-900);
  border: var(--edge);
  border-top: 4px solid var(--lime-400);
  position: relative;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 16px;
  width: 34px;
  height: 34px;
  border-top: 1px solid var(--orange-500);
  border-right: 1px solid var(--orange-500);
  pointer-events: none;
}

.page-about .about-cta h2 {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.35;
  color: var(--text-100);
}

.page-about .about-cta p {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-about .about-cta__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 焦点反馈 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: 1px;
}

.page-about [data-reveal] {
  animation: about-fade-in 420ms ease both;
}

@keyframes about-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    animation: none;
  }
  .page-about .timeline__item:hover .timeline__body {
    transform: none;
  }
  .page-about .rail-stats a,
  .page-about .scale-cell,
  .page-about .team-table tbody tr {
    transition: none;
  }
}
<<<END>>>