.page-about {
  --about-rail: 210px;
  --about-gap: clamp(28px, 4vw, 48px);
  position: relative;
  overflow-x: hidden;
  color: var(--white-100);
  background:
    radial-gradient(760px 440px at 8% -6%, rgba(33, 230, 193, 0.10), transparent 64%),
    radial-gradient(620px 380px at 96% 2%, rgba(245, 185, 63, 0.07), transparent 62%),
    var(--ink-950);
}

.page-about .about-crumb {
  padding-top: 20px;
}

.page-about .section {
  padding: clamp(44px, 7vw, 84px) 0;
}

.page-about .section-head {
  display: grid;
  gap: 12px;
  max-width: 720px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.12;
  letter-spacing: 0.01em;
}

.page-about .lede {
  margin: 0;
  color: var(--mist-400);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--mist-400);
  max-width: 38em;
}

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

/* 首屏 */
.page-about .about-hero {
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 76px);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1.04;
  letter-spacing: 0.01em;
}

.page-about .about-hero-lede {
  margin: 22px 0 0;
  padding-left: 18px;
  border-left: 2px solid rgba(33, 230, 193, 0.55);
  color: var(--mist-400);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.85;
  max-width: 38em;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-panel {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  background: linear-gradient(170deg, rgba(12, 38, 55, 0.96), rgba(8, 30, 46, 0.96));
}

.page-about .about-hero-panel::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 0;
  width: 2px;
  height: 42px;
  border-radius: 0 2px 2px 0;
  background: var(--amber-400);
}

.page-about .panel-label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber-400);
}

.page-about .hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .hero-facts li {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(23, 69, 92, 0.9);
}

.page-about .hero-facts li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .fact-num {
  font-size: 26px;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .fact-txt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist-400);
}

.page-about .panel-foot {
  margin: 18px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-400);
}

/* 起步 */
.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .about-origin-text .section-title {
  margin: 10px 0 20px;
}

.page-about .about-origin-figure {
  margin: 0;
}

.page-about .about-origin-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  object-fit: cover;
}

/* 年份轴 */
.page-about .timeline-cover {
  margin: 0 0 clamp(28px, 4vw, 44px);
}

.page-about .timeline-cover img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-600);
  border-radius: var(--radius-l);
  object-fit: cover;
}

.page-about .timeline-layout {
  display: grid;
  gap: 24px;
}

.page-about .toc-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist-400);
}

.page-about .toc-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .toc-item {
  flex: 0 0 auto;
}

.page-about .toc-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--mist-400);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .toc-link .mono {
  font-size: 13px;
  color: var(--cyan-400);
  opacity: 0.8;
}

.page-about .toc-link:hover {
  color: var(--white-100);
  background: rgba(23, 69, 92, 0.45);
}

.page-about .toc-link[aria-current="true"] {
  color: var(--white-100);
  background: rgba(33, 230, 193, 0.10);
  border-color: rgba(33, 230, 193, 0.38);
}

.page-about .era-stack {
  display: grid;
  gap: 18px;
}

.page-about .era {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(12, 38, 55, 0.92), rgba(6, 24, 38, 0.92));
  display: grid;
  gap: 14px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .era:hover {
  border-color: rgba(33, 230, 193, 0.42);
}

.page-about .era::before {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 0;
  width: 2px;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(180deg, var(--cyan-400), rgba(33, 230, 193, 0));
  opacity: 0.55;
}

.page-about .era-head {
  display: grid;
  gap: 8px;
}

.page-about .era-year {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(38px, 7vw, 60px);
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
  opacity: 0.5;
}

.page-about .era-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.2vw, 24px);
  line-height: 1.25;
  color: var(--white-100);
}

.page-about .era-problem {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-400);
}

.page-about .era-problem .mono {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 8px;
  border: 1px solid rgba(255, 106, 92, 0.45);
  border-radius: 999px;
  font-size: 12px;
  color: var(--coral-400);
  background: var(--coral-a12);
}

.page-about .era-body {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--mist-400);
  max-width: 40em;
}

/* 团队 */
.page-about .about-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  background: var(--line-600);
  overflow: hidden;
}

.page-about .band-cell {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  background: var(--ink-900);
}

.page-about .band-cell .data-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1;
  color: var(--amber-400);
}

.page-about .band-cell .data-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist-400);
}

.page-about .about-team-grid {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  padding: 20px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-card:hover {
  border-color: rgba(33, 230, 193, 0.4);
}

.page-about .team-num {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-about .team-card .card-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--white-100);
}

.page-about .team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist-400);
}

/* 校对流程 */
.page-about .flow-figure {
  margin: 0 0 var(--about-gap);
  padding: clamp(16px, 3vw, 28px);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-l);
  background: var(--ink-900);
}

.page-about .flow-svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .flow-svg text {
  font-family: var(--font-body);
}

.page-about .flow-node circle {
  fill: var(--ink-800);
  stroke: var(--line-600);
  stroke-width: 1.5;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.page-about .flow-node:hover circle,
.page-about .flow-node:focus circle {
  fill: rgba(33, 230, 193, 0.16);
  stroke: var(--cyan-400);
}

.page-about .flow-node:focus {
  outline: none;
}

.page-about .flow-idx {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--cyan-400);
}

.page-about .flow-name {
  font-size: 15px;
  font-weight: 500;
  fill: var(--white-100);
}

.page-about .flow-note {
  font-size: 12px;
  fill: var(--amber-400);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-about .flow-node:hover .flow-note,
.page-about .flow-node:focus .flow-note {
  opacity: 1;
}

.page-about .flow-figure figcaption {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed rgba(23, 69, 92, 0.9);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-400);
}

.page-about .about-proof-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .about-proof-figure {
  margin: 0;
}

.page-about .about-proof-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  object-fit: cover;
}

/* 同行与认可 */
.page-about .about-partners-inner {
  display: grid;
  gap: 24px;
  align-items: start;
}

.page-about .about-partners-text .section-title {
  margin: 10px 0 20px;
}

.page-about .about-award {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid rgba(245, 185, 63, 0.32);
  border-radius: var(--radius-m);
  background: linear-gradient(165deg, rgba(12, 38, 55, 0.95), rgba(6, 24, 38, 0.95));
}

.page-about .about-award .card-title {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.3;
  color: var(--white-100);
}

.page-about .about-award-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-400);
}

/* 接下来 */
.page-about .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  background: var(--line-600);
  overflow: hidden;
}

.page-about .next-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: clamp(18px, 3vw, 24px);
  background: var(--ink-900);
}

.page-about .next-num {
  font-size: 20px;
  line-height: 1.2;
  color: var(--amber-400);
}

.page-about .next-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--white-100);
}

.page-about .next-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-400);
}

/* 结尾 */
.page-about .about-cta {
  padding-bottom: clamp(56px, 9vw, 100px);
}

.page-about .cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid rgba(33, 230, 193, 0.28);
  border-radius: var(--radius-l);
  background:
    radial-gradient(520px 260px at 88% 0%, rgba(33, 230, 193, 0.16), transparent 70%),
    linear-gradient(165deg, rgba(12, 38, 55, 0.96), rgba(6, 24, 38, 0.96));
}

.page-about .cta-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.2vw, 36px);
  line-height: 1.16;
  color: var(--white-100);
}

.page-about .cta-text {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--mist-400);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

@media (min-width: 720px) {
  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .era-head {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: center;
    gap: 20px;
  }

  .page-about .next-item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-origin-grid,
  .page-about .about-proof-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: var(--about-gap);
  }

  .page-about .about-partners-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--about-gap);
  }

  .page-about .about-award {
    align-self: start;
  }
}

@media (min-width: 1024px) {
  .page-about .timeline-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .timeline-rail {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-about .toc-list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-about .toc-item {
    flex: 1 1 auto;
  }

  .page-about .toc-link {
    width: 100%;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-card:nth-child(even) {
    transform: translateY(18px);
  }

  .page-about .about-team-grid {
    padding-bottom: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .era,
  .page-about .flow-node circle,
  .page-about .flow-note {
    transition: opacity var(--dur) var(--ease);
  }

  .page-about .team-card:hover,
  .page-about .team-card:nth-child(even) {
    transform: none;
  }
}
<<<END>>>