.page-about {
  overflow-x: clip;
  --about-cut: 20px;
  --about-rail-w: 88px;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 28px);
  padding-bottom: clamp(6px, 1.5vw, 12px);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(8px, 2vw, 20px) 0 clamp(44px, 7vw, 92px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -22% -30% auto -30%;
  height: min(680px, 88vh);
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(55% 60% at 20% 26%, rgba(55, 183, 179, 0.24), transparent 72%),
    radial-gradient(48% 55% at 84% 6%, rgba(232, 162, 58, 0.15), transparent 70%);
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-about .rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 2px 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .rail-list::-webkit-scrollbar {
  display: none;
}

.page-about .rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border: 1px solid var(--line-lake);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--pale);
  font-size: 13px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--lake-soft);
  border-color: var(--lake);
  background: var(--surface-2);
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--lake);
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lake-soft);
}

.page-about h1 {
  margin: 0 0 20px;
  max-width: 22ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.05rem, 5.2vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-lead {
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3vw, 30px);
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  line-height: 1.82;
  color: var(--pale);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-sand);
  border: 1px solid var(--line-sand);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-facts > div {
  min-width: 0;
  padding: 14px 14px 16px;
  background: rgba(10, 26, 42, 0.94);
}

.page-about .about-facts dt {
  margin: 0 0 8px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .fact-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  letter-spacing: -0.01em;
  color: var(--amber-soft);
  margin-right: 4px;
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.35fr);
    gap: clamp(32px, 4.5vw, 68px);
  }

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

  .page-about .rail-list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
    border-left: 1px solid var(--line-sand);
  }

  .page-about .rail-list a {
    padding: 9px 0 9px 15px;
    border: 0;
    border-radius: 0;
    background: none;
    position: relative;
  }

  .page-about .rail-list a::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--lake);
    transform: translateY(-50%);
    transition: height 0.2s var(--ease);
  }

  .page-about .rail-list a:hover::before,
  .page-about .rail-list a:focus-visible::before {
    height: 22px;
  }

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

/* ---------- 通用章节头 ---------- */
.page-about .section {
  position: relative;
}

.page-about .section-head {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .chapter-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lake);
}

.page-about .section-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.2vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .section-lead {
  max-width: 66ch;
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-split-text p + p {
  margin-top: 16px;
}

.page-about .about-split-text > p:not(.section-lead) {
  max-width: 66ch;
  font-size: 0.96rem;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 起点 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

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

.page-about .media-frame {
  overflow: hidden;
  border-radius: 2px;
  border: 1px solid var(--line-lake);
  background: var(--deep);
}

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

.page-about .about-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-points {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line-sand);
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--pale);
}

.page-about .about-points strong {
  color: var(--paper);
  font-weight: 700;
}

.page-about .pt-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  isolation: isolate;
  overflow: hidden;
}

.page-about .tl-band {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: 0.2;
  pointer-events: none;
}

.page-about .tl-band img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72);
}

.page-about .about-timeline::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 26, 42, 0.94), rgba(10, 26, 42, 0.74) 42%, rgba(10, 26, 42, 0.96));
}

.page-about .tl-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line-lake);
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  gap: 8px;
  min-width: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lake);
  box-shadow: 0 0 0 4px rgba(55, 183, 179, 0.15);
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  letter-spacing: -0.01em;
  color: var(--lake-soft);
}

.page-about .tl-card {
  padding: 16px 18px;
  border: 1px solid var(--line-sand);
  background: rgba(6, 16, 28, 0.76);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .tl-card:hover {
  border-color: var(--line-lake);
  background: rgba(6, 16, 28, 0.92);
}

.page-about .tl-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 800px) {
  .page-about .tl-item {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 32px);
    align-items: start;
  }

  .page-about .tl-year {
    padding-top: 14px;
    text-align: right;
  }

  .page-about .tl-item::before {
    top: 20px;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .team-grid {
  display: grid;
  gap: 14px;
}

.page-about .team-panel {
  padding: 18px 20px;
  border: 1px solid var(--line-sand);
  border-left: 2px solid var(--lake);
  background: linear-gradient(135deg, rgba(55, 183, 179, 0.09), rgba(10, 26, 42, 0.6) 62%);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .team-panel:hover {
  border-color: var(--line-lake);
  transform: translateX(2px);
}

.page-about .tp-tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lake);
}

.page-about .team-panel h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .team-panel p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .team-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 覆盖 ---------- */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .cov-card {
  min-width: 0;
  padding: 16px 14px 18px;
  border: 1px solid var(--line-sand);
  background: var(--surface);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .cov-card:hover {
  border-color: var(--line-lake);
  background: var(--surface-2);
}

.page-about .cov-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber-soft);
}

.page-about .cov-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--paper);
}

.page-about .cov-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .cov-views {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-sand);
}

.page-about .cov-views li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-sand);
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .cv-name {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--pale);
}

@media (min-width: 860px) {
  .page-about .coverage-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .cov-views li {
    grid-template-columns: 110px minmax(0, 1fr);
  }
}

/* ---------- 视觉由来 ---------- */
.page-about .swatch-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-sand);
}

.page-about .swatch-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-sand);
}

.page-about .sw {
  display: block;
  width: 34px;
  height: 34px;
  border-radius: 4px;
  border: 1px solid rgba(216, 228, 234, 0.24);
}

.page-about .sw-night {
  background: #0a1a2a;
}

.page-about .sw-lake {
  background: #37b7b3;
}

.page-about .sw-amber {
  background: #e8a23a;
}

.page-about .sw-sand {
  background: #c9b9a4;
}

.page-about .swatch-list h3 {
  margin: 0 0 5px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--paper);
}

.page-about .swatch-list p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 沟通 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .reach-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--line-sand);
  background: var(--surface);
}

.page-about .reach-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .reach-card p {
  margin: 0;
  flex: 1;
  font-size: 0.89rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-about .reach-contact {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.9;
  color: var(--pale);
  word-break: break-word;
}

.page-about .reach-contact a {
  color: var(--lake-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}

.page-about .reach-contact a:hover,
.page-about .reach-contact a:focus-visible {
  border-color: currentColor;
}

.page-about .reach-link {
  align-self: flex-start;
  font-size: 0.87rem;
  font-weight: 600;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .reach-link:hover,
.page-about .reach-link:focus-visible {
  color: var(--amber-soft);
  border-color: currentColor;
}

@media (min-width: 820px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 锚点与动效 ---------- */
.page-about .section[id] {
  scroll-margin-top: 108px;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--lake-soft);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}
<<<END>>>