.page-about {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 56px;
  background:
    radial-gradient(92% 72% at 88% 2%, rgba(34, 224, 207, 0.16), transparent 62%),
    radial-gradient(70% 60% at 4% 98%, rgba(185, 107, 75, 0.2), transparent 66%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--orange), transparent);
  opacity: 0.55;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--haze);
}

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

.page-about .breadcrumb a {
  color: var(--haze);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--cyan);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 36px;
  min-width: 0;
}

.page-about .hero-eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .hero-lede {
  max-width: 34em;
  margin: 0 0 26px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--haze);
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 0 0 28px;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .fact-label {
  display: block;
  margin-top: 6px;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--haze);
}

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

.page-about .hero-figure {
  margin: 0;
  position: relative;
}

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  filter: saturate(1.05);
}

.page-about .hero-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--haze);
  opacity: 0.8;
}

/* ---------- 纸白阅读区 ---------- */
.page-about .about-body {
  background: var(--paper);
  color: var(--ink);
  padding: 56px 0 72px;
}

.page-about .about-layout {
  display: grid;
  gap: 32px;
  min-width: 0;
}

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

.page-about .toc-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ochre);
}

.page-about .toc ol {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
}

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

.page-about .toc a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 2px;
  border-bottom: 2px solid rgba(23, 59, 82, 0.18);
  color: var(--steel);
  text-decoration: none;
  font-size: 0.8125rem;
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .toc a:hover,
.page-about .toc a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--orange);
}

.page-about .toc-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ochre);
}

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

.page-about .chapter {
  padding-bottom: 46px;
  margin-bottom: 46px;
  border-bottom: 1px solid rgba(23, 59, 82, 0.14);
}

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

.page-about .chapter--terrain {
  background-image: repeating-radial-gradient(circle at 100% 0%, transparent 0 36px, rgba(185, 107, 75, 0.09) 36px 37px);
  background-repeat: no-repeat;
  background-size: 340px 340px;
  background-position: top right;
}

.page-about .chapter-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ochre);
}

.page-about .chapter-label::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: rgba(23, 59, 82, 0.16);
}

.page-about .chapter h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -0.006em;
  color: var(--ink);
}

.page-about .chapter p {
  max-width: 36em;
  margin: 0 0 16px;
  font-size: 0.9688rem;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .chapter-intro {
  color: var(--steel) !important;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(34, 224, 207, 0.85), rgba(185, 107, 75, 0.75));
}

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

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--cyan);
}

.page-about .tl-item--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 61, 0.16);
}

.page-about .tl-year {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.page-about .tl-item--now .tl-year {
  color: var(--orange);
}

.page-about .tl-title {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .tl-desc {
  display: block;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 流程 ---------- */
.page-about .flow {
  margin: 26px 0 0;
}

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

.page-about .flow-svg text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .flow-steps {
  display: grid;
  gap: 22px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-steps li {
  padding-top: 14px;
  border-top: 2px solid var(--cyan);
}

.page-about .flow-steps li:nth-child(2) {
  border-top-color: rgba(34, 224, 207, 0.5);
}

.page-about .flow-steps li:nth-child(3) {
  border-top-color: var(--orange);
}

.page-about .flow-step-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ochre);
}

.page-about .flow-steps strong {
  display: block;
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .flow-steps p {
  margin: 0;
  max-width: 30em;
  font-size: 0.9063rem;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .chapter-figure {
  margin: 30px 0 0;
}

.page-about .chapter-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-left: 3px solid var(--ochre);
}

.page-about .chapter-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 场景 ---------- */
.page-about .scene-list {
  display: grid;
  gap: 20px;
  margin: 26px 0 0;
}

.page-about .scene h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .scene h3::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--cyan);
}

.page-about .scene p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .stat {
  padding: 16px 14px;
  background: rgba(23, 59, 82, 0.055);
  border-left: 2px solid var(--ochre);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .stat-label {
  display: block;
  margin-top: 7px;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 合作 ---------- */
.page-about .partner-layout {
  display: grid;
  gap: 26px;
  margin: 26px 0 0;
  min-width: 0;
}

.page-about .partner-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-about .partner-list li {
  padding-left: 14px;
  border-left: 2px solid rgba(34, 224, 207, 0.55);
}

.page-about .partner-list strong {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .partner-list span {
  display: block;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
}

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

.page-about .partner-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
}

/* ---------- 下一阶段 ---------- */
.page-about .next-list {
  display: grid;
  gap: 18px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .next-list li {
  padding: 16px 0 0;
  border-top: 1px solid rgba(23, 59, 82, 0.16);
}

.page-about .next-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--pulse);
  border-radius: var(--radius);
}

.page-about .next-list strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .next-list p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(80% 120% at 90% 0%, rgba(34, 224, 207, 0.14), transparent 60%),
    var(--ink-2);
  color: var(--paper);
  padding: 52px 0 56px;
  border-top: 1px solid var(--line);
}

.page-about .cta-inner {
  display: grid;
  gap: 26px;
  min-width: 0;
}

.page-about .cta-copy h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  font-weight: 800;
  line-height: 1.18;
  color: var(--paper);
}

.page-about .cta-copy p {
  margin: 0;
  max-width: 32em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--haze);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .scene-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

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

  .page-about .next-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 52px) 0 72px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
    gap: 56px;
    align-items: end;
  }

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

  .page-about .partner-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    padding: 88px 0 104px;
  }

  .page-about .about-layout {
    grid-template-columns: 178px minmax(0, 1fr);
    gap: 68px;
    align-items: start;
  }

  .page-about .toc {
    position: sticky;
    top: calc(var(--header-h) + 36px);
  }

  .page-about .toc ol {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid rgba(23, 59, 82, 0.18);
  }

  .page-about .toc li {
    flex: none;
  }

  .page-about .toc a {
    padding: 8px 0 8px 14px;
    margin-left: -1px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    font-size: 0.875rem;
  }

  .page-about .toc a:hover,
  .page-about .toc a:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--orange);
  }

  .page-about .chapter {
    padding-bottom: 56px;
    margin-bottom: 56px;
  }

  .page-about .chapter p {
    font-size: 1rem;
  }

  .page-about .stat {
    padding: 20px 16px;
  }

  .page-about .about-cta {
    padding: 72px 0;
  }
}

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