.page-about {
  background: var(--void);
  color: var(--text);
  padding-bottom: 72px;
}

.page-about .crumbs {
  padding: 20px 0 0;
}

.page-about .about-hero {
  padding: 18px 0 0;
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: 28px;
  padding: 26px 20px 22px;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(43, 231, 218, 0.09), transparent 62%),
    radial-gradient(90% 80% at 92% 8%, rgba(255, 106, 31, 0.08), transparent 60%),
    var(--void);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero-inner::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 7px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line) 0 1px,
    transparent 1px 26px
  );
  pointer-events: none;
}

.page-about .about-hero-text h1 {
  margin: 10px 0 0;
  font-size: clamp(1.75rem, 6.2vw, 3.3rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-about .about-lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(43, 231, 218, 0.06);
}

.page-about .about-hero-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero-figure .figure-media {
  overflow: hidden;
  background-image:
    repeating-linear-gradient(90deg, rgba(37, 48, 83, 0.5) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(0deg, rgba(37, 48, 83, 0.35) 0 1px, transparent 1px 32px);
}

.page-about .figure-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--muted);
}

/* 章节通用 */
.page-about .section {
  padding: 56px 0 0;
}

.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(1.25rem, 3.4vw, 1.9rem);
  line-height: 1.3;
  letter-spacing: -0.015em;
  font-weight: 900;
}

.page-about .section-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

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

.page-about .chrono::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), var(--line) 70%, transparent);
}

.page-about .chrono-item {
  position: relative;
  padding: 0 0 26px 34px;
}

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

.page-about .chrono-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 231, 218, 0.14);
}

.page-about .chrono-item--now::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 31, 0.18);
}

.page-about .chrono-year {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  color: var(--cyan);
  margin-bottom: 10px;
}

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

.page-about .chrono-body {
  background: var(--panel);
}

.page-about .chrono-body .panel-title {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-about .chrono-body .panel-text {
  margin: 8px 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 团队 */
.page-about .team-layout {
  display: grid;
  gap: 22px;
}

.page-about .crew {
  display: grid;
  gap: 12px;
}

.page-about .crew-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: border-left-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .crew-card:hover {
  border-left-color: var(--orange);
  transform: translateY(-2px);
}

.page-about .crew-tag {
  margin: 0 0 8px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .crew-name {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-about .crew-text {
  margin: 8px 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .team-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

/* 变更流程 */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.page-about .flow-step {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 106, 31, 0.07), transparent 62%),
    var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .flow-num {
  display: block;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--orange);
}

.page-about .flow-name {
  margin: 12px 0 0;
  font-size: 1rem;
  line-height: 1.4;
}

.page-about .flow-text {
  margin: 8px 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .change-tail {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--line);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 68ch;
}

/* 路径对比 */
.page-about .path-grid {
  display: grid;
  gap: 14px;
}

.page-about .path-card {
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .path-card--old {
  border-top: 2px solid var(--line);
}

.page-about .path-card--now {
  border-top: 2px solid var(--orange);
  background:
    linear-gradient(180deg, rgba(43, 231, 218, 0.06), transparent 70%),
    var(--panel);
}

.page-about .path-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .path-steps {
  margin: 12px 0 0;
  font-size: 1.75rem;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .path-card--now .path-steps {
  color: var(--cyan);
}

.page-about .path-text {
  margin: 12px 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .path-note {
  margin: 24px 0 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 信息来源 */
.page-about .source-layout {
  display: grid;
  gap: 22px;
}

.page-about .source-name {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  line-height: 1.4;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
}

.page-about .source-text {
  margin: 0 0 20px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 64ch;
}

.page-about .source-copy .source-name:last-of-type {
  margin-top: 4px;
}

.page-about .source-copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 231, 218, 0.4);
}

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

.page-about .source-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

/* 数字 */
.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .stat-card {
  padding: 16px 14px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .stat-card:hover,
.page-about .stat-card:focus-visible {
  border-color: var(--cyan);
  background: rgba(43, 231, 218, 0.05);
  outline: none;
}

.page-about .stat-num {
  margin: 0;
  font-size: 1.625rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .stat-name {
  margin: 8px 0 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text);
}

.page-about .stat-extra {
  margin: 8px 0 0;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--muted);
  transition: color 200ms var(--ease);
}

.page-about .stat-card:hover .stat-extra,
.page-about .stat-card:focus-visible .stat-extra {
  color: var(--cyan);
}

.page-about .about-outro {
  margin: 30px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  max-width: 62ch;
}

.page-about .about-outro a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 231, 218, 0.4);
}

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

.page-about a:focus-visible,
.page-about .stat-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (min-width: 720px) {
  .page-about .about-hero-inner {
    padding: 34px 34px 26px;
  }

  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .path-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 980px) {
  .page-about .section {
    padding-top: 72px;
  }

  .page-about .chrono-item {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 26px;
    padding-left: 36px;
    padding-bottom: 30px;
  }

  .page-about .chrono-year {
    margin-bottom: 0;
    padding-top: 2px;
    font-size: 1.375rem;
  }

  .page-about .chrono::before {
    left: 8px;
  }

  .page-about .chrono-item::before {
    top: 10px;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 26px;
  }

  .page-about .team-figure {
    position: sticky;
    top: calc(var(--head-h) + 16px);
  }

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

  .page-about .source-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .source-figure {
    position: sticky;
    top: calc(var(--head-h) + 16px);
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .stat-num {
    font-size: 2rem;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-inner {
    padding: 40px 44px 30px;
    gap: 32px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .crew-card,
  .page-about .stat-card,
  .page-about .stat-extra,
  .page-about .about-jump a {
    transition: none;
    transform: none;
  }
}
<<<END>>>