.page-about {
  --about-rail: 196px;
  --about-year: clamp(34px, 5.6vw, 62px);
  display: block;
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .breadcrumb {
  margin-top: clamp(12px, 2vw, 24px);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .breadcrumb__list a {
  color: var(--deep-blue);
  text-decoration: none;
}

.page-about .breadcrumb__list a:hover,
.page-about .breadcrumb__list a:focus-visible {
  color: var(--leap-orange);
}

.page-about .breadcrumb__sep {
  color: var(--sand-gold);
}

/* ---------- 首屏档案框 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(16px, 2.4vw, 28px);
  border: 1px solid rgba(87, 198, 194, 0.34);
  border-radius: var(--radius);
  overflow: hidden;
  color: var(--paper);
  background:
    radial-gradient(120% 100% at 8% 0%, rgba(46, 143, 176, 0.55), transparent 62%),
    radial-gradient(90% 80% at 100% 100%, rgba(255, 107, 26, 0.22), transparent 60%),
    linear-gradient(150deg, #041C30 0%, #0B4A73 68%, #06314f 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background: repeating-linear-gradient(90deg, var(--sand-gold) 0 1px, transparent 1px 26px);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__inner {
  padding: clamp(28px, 5vw, 64px) clamp(20px, 4vw, 56px) clamp(24px, 4vw, 48px);
  max-width: 46rem;
}

.page-about .about-hero .index-label {
  color: var(--wave-cyan);
  letter-spacing: 0.18em;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 300;
  color: var(--paper);
}

.page-about .about-hero__title strong {
  font-weight: 800;
  color: var(--leap-orange);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.75;
  color: rgba(246, 242, 234, 0.94);
  max-width: 36em;
}

.page-about .about-hero__sub {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(246, 242, 234, 0.68);
  max-width: 34em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero .btn--ghost {
  color: var(--paper);
  border-color: rgba(246, 242, 234, 0.42);
}

.page-about .about-hero .btn--ghost:hover,
.page-about .about-hero .btn--ghost:focus-visible {
  color: var(--deep-ink);
  background: var(--sand-gold);
  border-color: var(--sand-gold);
}

.page-about .about-hero__ticks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  list-style: none;
  margin: 0;
  padding: 16px clamp(20px, 4vw, 56px) 26px;
  border-top: 1px solid rgba(246, 242, 234, 0.16);
  font-size: 13px;
  color: rgba(246, 242, 234, 0.72);
}

.page-about .about-hero__ticks .mono {
  color: var(--sand-gold);
  font-size: 15px;
  margin-right: 4px;
}

/* ---------- 主体双列 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(32px, 5vw, 64px);
}

.page-about .about-rail__label {
  color: var(--sea-blue);
  margin: 0;
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 10px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line-ink);
  border-radius: 999px;
  font-size: 13px;
  color: var(--deep-blue);
  text-decoration: none;
  transition: border-color 220ms var(--ease), color 220ms var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--leap-orange);
  color: var(--leap-orange);
}

.page-about .about-rail__num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--sand-gold);
}

.page-about .about-section {
  margin-bottom: clamp(52px, 8vw, 104px);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-about .about-section:last-of-type {
  margin-bottom: clamp(36px, 5vw, 64px);
}

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

.page-about .about-prose {
  max-width: 60ch;
  margin-top: 18px;
}

.page-about .about-prose p {
  margin: 0 0 1em;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 62ch;
}

.page-about .about-points li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 16px;
  height: 2px;
  background: var(--leap-orange);
}

.page-about .about-points strong {
  color: var(--deep-blue);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 24px 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  background: linear-gradient(135deg, rgba(46, 143, 176, 0.3), rgba(4, 28, 48, 0.5));
}

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* ---------- 小组标签页 ---------- */
.page-about .team-tabs {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-about .team-tab {
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  background: var(--paper);
  transition: border-color 220ms var(--ease), box-shadow 220ms var(--ease), transform 220ms var(--ease);
}

.page-about .team-tab:hover {
  transform: translateY(-2px);
  border-color: var(--sea-blue);
}

.page-about .team-tab[open] {
  border-color: var(--deep-blue);
  box-shadow: 0 16px 36px rgba(4, 28, 48, 0.12);
}

.page-about .team-tab__sum {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  color: var(--deep-blue);
}

.page-about .team-tab__sum::-webkit-details-marker {
  display: none;
}

.page-about .team-tab__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--leap-orange);
}

.page-about .team-tab[open] .team-tab__sum::after {
  content: "−";
}

.page-about .team-tab__num {
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(87, 198, 194, 0.22);
  color: var(--deep-blue);
}

.page-about .team-tab__role {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-soft);
}

.page-about .team-tab__body {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
  max-width: 62ch;
}

.page-about .team-tab__body p {
  margin: 0;
}

.page-about .team-tab__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .tl-item {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-top: 1px solid var(--line-ink);
}

.page-about .tl-item:last-child {
  border-bottom: 1px solid var(--line-ink);
}

.page-about .tl-mark {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: var(--about-year);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--sea-blue);
}

.page-about .tl-item--now .tl-mark {
  color: var(--leap-orange);
  font-weight: 500;
}

.page-about .tl-yearline {
  display: block;
  width: 34px;
  height: 2px;
  background: var(--sand-gold);
}

.page-about .tl-body h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--deep-blue);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
  max-width: 56ch;
}

/* ---------- 维护节奏 ---------- */
.page-about .rhythm-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .rhythm-item {
  position: relative;
  padding: 22px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line-ink);
  background: var(--paper);
}

.page-about .rhythm-item__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sea-blue);
  margin-bottom: 10px;
}

.page-about .rhythm-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--deep-blue);
}

.page-about .rhythm-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .rhythm-item:nth-child(2) {
  background: rgba(87, 198, 194, 0.12);
  border-color: rgba(87, 198, 194, 0.45);
}

.page-about .rhythm-item:nth-child(3) {
  background: linear-gradient(160deg, rgba(4, 28, 48, 0.96), rgba(11, 74, 115, 0.92));
  border-color: rgba(232, 200, 138, 0.42);
}

.page-about .rhythm-item:nth-child(3) h3 {
  color: var(--sand-gold);
}

.page-about .rhythm-item:nth-child(3) p {
  color: rgba(246, 242, 234, 0.86);
}

.page-about .rhythm-item:nth-child(3) .rhythm-item__num {
  color: var(--wave-cyan);
}

/* ---------- 规模数据卡 ---------- */
.page-about .stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.page-about .stat {
  position: relative;
  padding: 22px 18px 18px;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}

.page-about .stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: var(--sea-blue);
}

.page-about .stat--orange::before { background: var(--leap-orange); }
.page-about .stat--cyan::before { background: var(--wave-cyan); }
.page-about .stat--sand::before { background: var(--sand-gold); }
.page-about .stat--coral::before { background: var(--coral); }

.page-about .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--deep-blue);
}

.page-about .stat__unit {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  margin-left: 4px;
  color: var(--ink-soft);
}

.page-about .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 页尾通栏 ---------- */
.page-about .about-cta {
  position: relative;
  margin-top: clamp(40px, 6vw, 80px);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--deep-ink);
}

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

.page-about .about-cta__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.92;
}

.page-about .about-cta__body {
  position: relative;
  padding: clamp(22px, 4vw, 40px);
  color: var(--paper);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(246, 242, 234, 0.82);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-cta .btn--ghost {
  color: var(--paper);
  border-color: rgba(246, 242, 234, 0.42);
}

.page-about .about-cta .btn--ghost:hover,
.page-about .about-cta .btn--ghost:focus-visible {
  color: var(--deep-ink);
  background: var(--sand-gold);
  border-color: var(--sand-gold);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .rhythm-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .tl-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-about .stat--wide {
    grid-column: span 2;
  }
}

@media (min-width: 860px) {
  .page-about .about-cta__body {
    position: absolute;
    left: clamp(24px, 4vw, 52px);
    bottom: clamp(24px, 4vw, 48px);
    max-width: 500px;
    padding: clamp(22px, 2.6vw, 34px);
    border: 1px solid rgba(246, 242, 234, 0.2);
    border-radius: var(--radius);
    background: rgba(4, 28, 48, 0.72);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 3.4vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 0;
    overflow: visible;
    padding: 0;
    margin-top: 14px;
    border-left: 1px solid var(--line-ink);
  }

  .page-about .about-rail__link {
    border: 0;
    border-radius: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-tab,
  .page-about .about-rail__link {
    transition: none;
  }
}
<<<END>>>