.page-about {
  --ab-gap: 18px;
  --ab-radius: var(--radius-lg);
  position: relative;
  overflow-x: hidden;
  padding-bottom: 72px;
  color: var(--ice);
  background:
    radial-gradient(880px 520px at 88% -8%, rgba(47, 245, 200, 0.10), transparent 62%),
    radial-gradient(680px 420px at -8% 42%, rgba(255, 122, 51, 0.07), transparent 66%),
    var(--ink-900);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(156, 196, 210, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(156, 196, 210, 0.055) 1px, transparent 1px);
  background-size: 62px 62px;
  opacity: 0.9;
}

.page-about > * {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--aurora);
  text-transform: uppercase;
}

.page-about .section-head {
  margin-bottom: 26px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .section-head__title {
  margin: 10px 0 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(22px, 5.4vw, 32px);
  line-height: 1.3;
  color: var(--ice);
}

.page-about .section-head__note {
  margin: 10px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.about-hero {
  padding: 26px 0 8px;
}

.about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.about-hero h1 .hl {
  color: var(--aurora);
  box-shadow: inset 0 -0.16em 0 rgba(47, 245, 200, 0.22);
}

.about-hero__intro {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--mist);
}

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

.about-hero__jump a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.about-hero__jump a:hover,
.about-hero__jump a:focus-visible {
  color: var(--ink-900);
  background: var(--aurora);
  border-color: var(--aurora);
}

.about-hero__vertical {
  display: none;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--line);
  overflow: hidden;
  box-shadow: var(--shadow-panel);
}

.stat {
  position: relative;
  padding: 16px 14px;
  background: var(--ink-800);
  outline: none;
  transition: background 180ms var(--ease);
}

.stat:focus-visible {
  box-shadow: inset 0 0 0 2px var(--aurora);
}

.stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 34px;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--aurora);
}

.stat__unit {
  font-size: 18px;
  margin-left: 1px;
}

.stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.stat__note {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--lime);
  transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin 200ms var(--ease);
}

.stat:hover .stat__note,
.stat:focus .stat__note,
.stat:focus-within .stat__note {
  max-height: 90px;
  margin-top: 8px;
  opacity: 1;
}

.about-hero__figure {
  margin: 28px 0 0;
}

.page-about .media-frame {
  margin-inline: 0;
}

.page-about .media-frame__ratio {
  position: relative;
  overflow: hidden;
  border-radius: var(--ab-radius);
  border: 1px solid var(--line-strong);
  background: var(--ink-800);
  aspect-ratio: 16 / 9;
}

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

.page-about .media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 通用区块间距 ---------- */
.page-about section {
  padding: 52px 0 0;
}

/* ---------- 时间线 ---------- */
.tl-axis {
  display: block;
  width: 100%;
  height: 34px;
  color: var(--teal);
  margin: 0 0 18px;
}

.tl {
  position: relative;
  display: grid;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--aurora), rgba(47, 245, 200, 0.08));
}

.tl__item {
  position: relative;
  padding-left: 34px;
}

.tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--aurora);
  box-shadow: 0 0 0 4px rgba(47, 245, 200, 0.10);
}

.tl__year {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--aurora);
}

.tl__body h3 {
  margin: 8px 0 6px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--ice);
}

.tl__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.about-team__paper {
  padding: 24px 20px;
  border-radius: var(--ab-radius);
}

.about-team__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-700);
}

.about-team__paper h3 {
  margin: 10px 0 12px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink-900);
}

.about-team__paper > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-700);
}

.about-team__checks {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.about-team__checks li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-top: 10px;
  border-top: 1px solid rgba(6, 19, 30, 0.16);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-900);
}

.about-team__checks .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-700);
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.about-team__fig .media-frame__ratio {
  aspect-ratio: 4 / 3;
}

/* ---------- 覆盖范围 ---------- */
.idx {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--line);
  overflow: hidden;
}

.idx__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 14px;
  min-height: 44px;
  background: var(--ink-800);
  color: inherit;
  text-decoration: none;
  transition: background 180ms var(--ease), box-shadow 180ms var(--ease);
}

.idx__row:hover,
.idx__row:focus-visible {
  background: var(--ink-700);
  box-shadow: inset 3px 0 0 var(--aurora);
}

.idx__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--aurora);
  padding-top: 2px;
}

.idx__body {
  display: grid;
  gap: 4px;
}

.idx__body strong {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
}

.idx__body span {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.figures__item {
  padding: 16px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(23, 57, 77, 0.72), rgba(12, 34, 51, 0.9));
}

.figures__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 38px;
  line-height: 1;
  color: var(--lime);
}

.figures__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ice);
}

.figures__note {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 共建 ---------- */
.about-cobuild__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
}

.about-cobuild__fig .media-frame__ratio {
  aspect-ratio: 4 / 3;
  border-radius: var(--ab-radius);
}

.about-cobuild__text h2 {
  margin: 10px 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(21px, 5vw, 28px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ice);
}

.about-cobuild__text > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.about-cobuild__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.about-cobuild__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.about-cobuild__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--signal);
}

.about-cobuild__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  text-decoration: none;
}

/* ---------- 荣誉 ---------- */
.honor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.honor {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-sm);
  background: rgba(12, 34, 51, 0.72);
}

.honor__tag {
  display: inline-block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.honor h3 {
  margin: 10px 0 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
}

.honor > p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 优化方向 ---------- */
.about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.about-next__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(21px, 5vw, 28px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ice);
}

.about-next__note {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.next-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.next-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(23, 57, 77, 0.55);
  border: 1px solid var(--line);
}

.next-list__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--signal);
  padding-top: 3px;
}

.next-list h3 {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
}

.next-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.about-next__cta {
  margin-top: 28px;
  padding: 22px 18px;
  border-radius: var(--ab-radius);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(120deg, rgba(47, 245, 200, 0.08), rgba(255, 122, 51, 0.06)),
    var(--ink-800);
}

.about-next__cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ice);
}

.about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 32px;
    align-items: start;
  }

  .stat-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .idx__row {
    grid-template-columns: 60px minmax(0, 1fr);
    padding: 18px 20px;
  }

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

  .honor-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 26px;
  }

  .about-cobuild__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 30px;
  }

  .about-next__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 30px;
  }

  .about-next__cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 24px 26px;
  }

  .about-next__cta p {
    flex: 1 1 320px;
  }

  .about-next__actions {
    margin-top: 0;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about section {
    padding-top: 66px;
  }

  .about-hero {
    padding-top: 34px;
  }

  .about-hero__vertical {
    display: block;
    writing-mode: vertical-rl;
    height: 216px;
    margin: 0 0 18px auto;
    padding-inline-start: 12px;
    border-inline-start: 1px solid var(--line-strong);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.34em;
    color: var(--aurora);
  }

  .about-hero__figure {
    margin-top: 36px;
  }

  .tl {
    gap: 26px;
  }

  .tl__item {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 24px;
    padding-left: 44px;
  }

  .tl__item::before {
    top: 12px;
  }

  .tl__year {
    font-size: 40px;
  }

  .tl__body h3 {
    margin-top: 0;
    font-size: 19px;
  }

  .tl__body p {
    font-size: 15.5px;
  }

  .about-team__paper {
    padding: 30px 28px;
  }

  .about-next__cta {
    padding: 28px 32px;
  }
}

/* ---------- 动画降级 ---------- */
@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;
  }

  .page-about .stat__note {
    transition: none;
  }
}