.page-about {
  --about-line: rgba(53, 224, 206, 0.24);
  --about-line-soft: rgba(156, 182, 198, 0.26);
  background: var(--sea);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  letter-spacing: -0.01em;
}

.page-about h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.2;
  margin: 0.35rem 0 1rem;
}

.page-about .about-hero {
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.25rem, 5vw, 3.5rem);
  background:
    radial-gradient(circle at 86% 6%, rgba(53, 224, 206, 0.14), transparent 56%),
    repeating-linear-gradient(0deg, rgba(53, 224, 206, 0.05) 0 1px, transparent 1px 42px),
    var(--sea);
  border-bottom: var(--edge-bold) solid var(--glass);
}

.page-about .hero-grid {
  display: grid;
  gap: var(--gap-4);
  margin-top: var(--gap-3);
}

.page-about .hero-main {
  order: 1;
  min-width: 0;
}

.page-about .rail-nav {
  order: 2;
  min-width: 0;
}

.page-about .hero-main h1 {
  font-size: clamp(2.2rem, 6.6vw, 4.4rem);
  line-height: 1.08;
  margin: 0.4rem 0 1rem;
}

.page-about .hero-lead {
  max-width: 44ch;
  color: var(--mist);
  font-size: clamp(1rem, 2.1vw, 1.12rem);
  line-height: 1.78;
  margin: 0;
}

.page-about .rail-nav__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 var(--gap-2);
  padding-left: 0.9rem;
}

.page-about .rail-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .rail-nav__item {
  border-left: var(--edge) solid var(--glass);
  transition: border-color 0.16s ease;
}

.page-about .rail-nav__item:hover,
.page-about .rail-nav__item:focus-within {
  border-left-color: var(--coral);
}

.page-about .rail-nav__link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.55rem 0 0.55rem 0.9rem;
  color: var(--mist);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.16s ease;
}

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

.page-about .rail-nav__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--gap-3);
  margin: var(--gap-5) 0 0;
  padding: var(--gap-3) 0 0;
  border-top: 1px dashed var(--about-line);
}

.page-about .hero-stat {
  min-width: 0;
}

.page-about .hero-stat__num {
  display: block;
  margin: 0.25rem 0 0;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-about .hero-stat__label {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mist);
}

/* 品牌档案 */
.page-about .about-archive {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  color: var(--ink);
}

.page-about .section--paper .section-label {
  color: var(--ink-soft);
}

.page-about .archive-grid {
  display: grid;
  gap: var(--gap-5);
  align-items: start;
}

.page-about .archive-copy h2 {
  color: var(--ink);
}

.page-about .archive-copy p {
  color: var(--ink-soft);
  line-height: 1.78;
}

.page-about .archive-points {
  list-style: none;
  margin: var(--gap-4) 0 0;
  padding: var(--gap-3) 0 0;
  border-top: var(--edge) solid var(--ink);
  display: grid;
  gap: var(--gap-2);
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.65;
}

.page-about .archive-points li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
}

.page-about .archive-points__mark {
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: 0.35rem;
  background: var(--coral);
  border: 2px solid var(--ink);
}

.page-about .archive-media {
  border: var(--edge-bold) solid var(--ink);
  box-shadow: var(--shadow-paper);
  background: var(--paper);
  margin: 0;
}

.page-about .archive-media .media-frame__caption {
  padding: 0.6rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: var(--edge) solid var(--ink);
}

.page-about .btn-row {
  margin: var(--gap-4) 0 0;
}

.page-about .about-archive .btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border: var(--edge) solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 0.94rem;
  text-decoration: none;
  box-shadow: var(--shadow-paper);
  transition: background 0.16s ease, color 0.16s ease;
}

.page-about .about-archive .btn:hover {
  background: var(--coral);
  color: var(--ink);
}

/* 运营方法 */
.page-about .method-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background: var(--sea-2);
  border-block: var(--edge-bold) solid var(--glass);
}

.page-about .section-intro {
  color: var(--mist);
  line-height: 1.8;
  margin: 0 0 var(--gap-4);
}

.page-about .method-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--gap-2);
}

.page-about .method-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: var(--gap-2);
  padding: var(--gap-3) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .method-item__num {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--cyan);
  padding-top: 0.15rem;
}

.page-about .method-item h3 {
  font-size: 1.08rem;
  margin: 0 0 0.4rem;
  color: var(--paper);
}

.page-about .method-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .method-tail {
  margin: var(--gap-4) 0 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .link-underline {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
  padding-bottom: 1px;
}

.page-about .link-underline:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* 发展历程 */
.page-about .timeline-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background:
    linear-gradient(180deg, rgba(31, 91, 104, 0.2), transparent 40%),
    var(--sea);
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: var(--gap-5) 0 0;
  padding: 0 0 0 1.75rem;
  display: grid;
  gap: var(--gap-4);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0.55rem;
  top: 0.5rem;
  bottom: 0.75rem;
  width: var(--edge-bold);
  background: linear-gradient(180deg, var(--cyan), var(--coral));
}

.page-about .timeline__item {
  position: relative;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -1.6rem;
  top: 0.85rem;
  width: 12px;
  height: 12px;
  background: var(--amber);
  border: 2px solid var(--ink);
}

.page-about .timeline__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin: 0 0 var(--gap-1);
}

.page-about .timeline__card {
  background: var(--paper);
  color: var(--ink);
  border: var(--edge) solid var(--ink);
  box-shadow: var(--shadow-paper);
  padding: var(--gap-3) var(--gap-3) var(--gap-4);
}

.page-about .timeline__card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.page-about .timeline__card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .timeline__tag {
  margin-top: var(--gap-2) !important;
  font-family: var(--font-mono);
  font-size: 0.8rem !important;
}

.page-about .timeline__card .link-underline {
  color: var(--ink);
  border-bottom-color: var(--coral);
}

.page-about .timeline__card .link-underline:hover {
  color: var(--alert);
  border-bottom-color: var(--alert);
}

/* 团队 */
.page-about .team-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background: var(--sea-2);
  border-top: var(--edge-bold) solid var(--glass);
}

.page-about .team-grid {
  display: grid;
  gap: var(--gap-5);
  align-items: start;
}

.page-about .team-media {
  margin: 0;
  border: var(--edge-bold) solid var(--glass);
  box-shadow: var(--shadow-hard);
}

.page-about .team-media .media-frame__caption {
  padding: 0.6rem 0.6rem 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .team-copy p.measure {
  color: var(--mist);
  line-height: 1.8;
}

.page-about .role-grid {
  display: grid;
  gap: var(--gap-2);
  margin-top: var(--gap-4);
}

.page-about .role-card {
  padding: var(--gap-3);
  background: rgba(6, 24, 38, 0.72);
  border: var(--edge) solid var(--glass);
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-about .role-card__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--amber);
  margin: 0 0 0.35rem;
  letter-spacing: 0.16em;
}

.page-about .role-card h3 {
  font-size: 1rem;
  margin: 0 0 0.4rem;
  color: var(--paper);
}

.page-about .role-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 服务网络 */
.page-about .network-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  background:
    radial-gradient(circle at 12% 88%, rgba(255, 106, 77, 0.12), transparent 55%),
    var(--sea);
}

.page-about .network-grid {
  display: grid;
  gap: var(--gap-5);
  margin-top: var(--gap-3);
  align-items: start;
}

.page-about .network-copy p.measure {
  color: var(--mist);
  line-height: 1.8;
}

.page-about .node-list {
  list-style: none;
  margin: var(--gap-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap-2);
}

.page-about .node-list li {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  padding: 0.55rem 0.8rem;
  border-left: var(--edge) solid var(--glass);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--mist);
  transition: border-color 0.16s ease, background 0.16s ease;
}

.page-about .node-list li:hover {
  border-left-color: var(--coral);
  background: rgba(31, 91, 104, 0.3);
}

.page-about .node-list__dot {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 0.5rem;
}

.page-about .node-list__dot--cyan {
  background: var(--cyan);
}

.page-about .node-list__dot--coral {
  background: var(--coral);
}

.page-about .node-list__dot--amber {
  background: var(--amber);
}

.page-about .network-media {
  margin: var(--gap-4) 0 0;
  border: var(--edge) solid var(--glass);
}

.page-about .network-figure {
  margin: 0;
  padding: var(--gap-4) var(--gap-2);
  border: var(--edge) solid var(--glass);
  background: rgba(11, 36, 56, 0.5);
}

.page-about .network-figure svg {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
}

.page-about .network-caption {
  margin: var(--gap-2) 0 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--mist);
}

/* 荣誉 */
.page-about .honors-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  color: var(--ink);
}

.page-about .honors-section h2 {
  color: var(--ink);
}

.page-about .honor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--gap-3);
  margin-top: var(--gap-4);
}

.page-about .honor-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: var(--gap-3);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: var(--edge-bold) solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
  text-align: center;
}

.page-about .honor-badge__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--ink);
}

.page-about .honor-badge__label {
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 14ch;
}

.page-about .honors-note {
  margin: var(--gap-4) 0 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* CTA */
.page-about .about-cta {
  padding: clamp(2rem, 5vw, 3.25rem) 0;
  background: var(--coral);
  color: var(--ink);
  border-block: var(--edge-bold) solid var(--ink);
}

.page-about .cta-inner {
  display: grid;
  gap: var(--gap-3);
}

.page-about .about-cta h2 {
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.page-about .cta-text {
  margin: 0;
  max-width: 46ch;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--ink);
  opacity: 0.85;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-2);
  margin: 0;
}

.page-about .cta-actions .btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  font-size: 0.94rem;
  text-decoration: none;
  border: var(--edge) solid var(--ink);
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.page-about .cta-actions .btn--primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow-paper);
}

.page-about .cta-actions .btn--primary:hover {
  background: var(--sea);
}

.page-about .cta-actions .btn--ghost {
  background: transparent;
  color: var(--ink);
}

.page-about .cta-actions .btn--ghost:hover {
  background: var(--paper);
}

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

@media (min-width: 700px) {
  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .method-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--gap-5);
  }

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

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: 222px minmax(0, 1fr);
    gap: var(--gap-6);
    align-items: start;
    margin-top: var(--gap-4);
  }

  .page-about .hero-main {
    order: 0;
  }

  .page-about .rail-nav {
    order: 0;
    position: sticky;
    top: 5.5rem;
  }

  .page-about .archive-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--gap-6);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--gap-6);
  }

  .page-about .network-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: var(--gap-6);
    align-items: center;
  }

  .page-about .timeline {
    padding-left: 2rem;
  }
}

@media (min-width: 1100px) {
  .page-about .method-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .method-item {
    grid-template-columns: minmax(0, 1fr);
    padding-top: var(--gap-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-nav__item,
  .page-about .rail-nav__link,
  .page-about .role-card,
  .page-about .node-list li,
  .page-about .about-archive .btn,
  .page-about .cta-actions .btn {
    transition: none;
  }
}
<<<END>>>