.page-about {
  --ab-panel: rgba(18, 43, 69, 0.72);
  --ab-line: rgba(46, 242, 198, 0.38);
  color: var(--snow);
  display: block;
  overflow-x: hidden;
}

.page-about .section {
  padding: clamp(2.8rem, 7vw, 5.5rem) 0;
}

.page-about .ab-hl {
  background: linear-gradient(180deg, transparent 66%, rgba(46, 242, 198, 0.28) 66%);
  padding-bottom: 0.06em;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(0.9rem, 3vw, 1.6rem);
}
.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  color: var(--grey);
}
.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--hair-strong);
}
.page-about .crumbs a {
  color: var(--grey);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(1.8rem, 5vw, 3.4rem) 0 clamp(2.4rem, 6vw, 4.2rem);
  background:
    radial-gradient(120% 92% at 84% 6%, rgba(46, 242, 198, 0.14), transparent 58%),
    radial-gradient(90% 70% at 6% 96%, rgba(255, 90, 60, 0.1), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-3) 100%);
  overflow: hidden;
}
.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -34% 38%;
  height: 62%;
  background: repeating-linear-gradient(104deg, transparent 0 22px, rgba(77, 168, 255, 0.07) 22px 24px);
  pointer-events: none;
}
.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.8rem, 5vw, 3rem);
}
.page-about .ab-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.06;
  font-size: clamp(2.05rem, 7.2vw, 4.3rem);
  margin: 0.55rem 0 1rem;
  max-width: 16ch;
}
.page-about .ab-hero__deck {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.7vw, 1.12rem);
  line-height: 1.8;
  color: rgba(245, 249, 255, 0.86);
}
.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .ab-hero__side {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: clamp(0.7rem, 2vw, 1.2rem);
}
.page-about .ab-vert {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--blue);
  align-self: stretch;
  padding-top: 0.2rem;
}
.page-about .ab-stats {
  flex: 1;
  margin: 0;
  padding: 0 0 0 clamp(0.9rem, 2vw, 1.4rem);
  list-style: none;
  border-left: 2px solid var(--ab-line);
  display: grid;
  gap: 0.75rem;
}
.page-about .ab-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--hair);
}
.page-about .ab-stats li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .ab-stats .data-num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.6vw, 2rem);
  letter-spacing: -0.02em;
  color: var(--cyan);
  line-height: 1.1;
}
.page-about .ab-stats__label {
  font-size: 0.84rem;
  letter-spacing: 0.05em;
  color: var(--grey);
}

/* ---------- 品牌起点 ---------- */
.page-about .ab-story {
  background: linear-gradient(180deg, var(--ink-3), var(--ink));
}
.page-about .ab-story__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
}
.page-about .ab-story__copy > p {
  margin: 0 0 1.15rem;
  line-height: 1.85;
  color: rgba(245, 249, 255, 0.82);
}
.page-about .ab-story__copy > p:first-child {
  font-size: clamp(1.04rem, 1.9vw, 1.26rem);
  line-height: 1.85;
  color: var(--snow);
}
.page-about .ab-story__copy > p:first-child::before {
  content: "";
  display: block;
  width: 58px;
  height: 3px;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--cyan), transparent);
}
.page-about .ab-story__copy > p:last-child {
  margin-bottom: 0;
}

/* ---------- 时间带 ---------- */
.page-about .ab-timeline {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 55%, var(--ink-3) 100%);
}
.page-about .ab-timeline__head {
  display: grid;
  gap: 0.8rem;
}
.page-about .ab-timeline__hint {
  margin: 0;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--grey);
}
.page-about .ab-track {
  list-style: none;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0.6rem max(var(--gutter), calc((100% - var(--shell)) / 2)) 1.4rem;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(228px, 76vw);
  gap: clamp(0.85rem, 2.4vw, 1.3rem);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-line) transparent;
}
.page-about .ab-track::-webkit-scrollbar {
  height: 6px;
}
.page-about .ab-track::-webkit-scrollbar-thumb {
  background: var(--cyan-line);
  border-radius: 99px;
}
.page-about .ab-node {
  position: relative;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.5rem 1.2rem 1.2rem;
  background: var(--ab-panel);
  border: 1px solid var(--hair);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .ab-node:hover,
.page-about .ab-node:focus-within {
  transform: translateY(-5px);
  border-color: var(--ab-line);
}
.page-about .ab-node__dot {
  position: absolute;
  top: -5px;
  left: 1.2rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  animation: ab-pulse 2.6s ease-out infinite;
}
@keyframes ab-pulse {
  0% { box-shadow: 0 0 0 0 rgba(46, 242, 198, 0.45); }
  70% { box-shadow: 0 0 0 13px rgba(46, 242, 198, 0); }
  100% { box-shadow: 0 0 0 0 rgba(46, 242, 198, 0); }
}
.page-about .ab-node__year {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.page-about .ab-node h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  line-height: 1.45;
}
.page-about .ab-node > p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--grey);
}
.page-about .ab-node__more {
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--hair);
}
.page-about .ab-node__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--blue);
}
.page-about .ab-node__more summary::-webkit-details-marker {
  display: none;
}
.page-about .ab-node__more summary::after {
  content: " +";
  font-family: var(--font-num);
}
.page-about .ab-node__more[open] summary::after {
  content: " −";
}
.page-about .ab-node__more p {
  margin: 0.55rem 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: rgba(245, 249, 255, 0.72);
}

/* ---------- 内容规模 ---------- */
.page-about .ab-coverage {
  background: var(--ink-2);
  position: relative;
}
.page-about .ab-coverage::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}
.page-about .ab-coverage__grid {
  display: grid;
  gap: clamp(1.8rem, 4.5vw, 3rem);
}
.page-about .ab-coverage__text > p {
  margin: 0;
  line-height: 1.85;
  color: rgba(245, 249, 255, 0.82);
}
.page-about .ab-figures {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
}
.page-about .ab-figures li {
  padding: 0.9rem 1rem;
  background: var(--teal);
  border-left: 2px solid var(--cyan);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .ab-figures li:hover,
.page-about .ab-figures li:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.page-about .ab-figures .data-num {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.8vw, 1.55rem);
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.page-about .ab-fig__name {
  display: block;
  margin-top: 0.1rem;
  font-size: 0.9rem;
  color: var(--snow);
}
.page-about .ab-fig__more {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.79rem;
  line-height: 1.65;
  color: var(--grey);
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin var(--dur) var(--ease);
}
.page-about .ab-figures li:hover .ab-fig__more,
.page-about .ab-figures li:focus-within .ab-fig__more {
  max-height: 7rem;
  opacity: 1;
  margin-top: 0.45rem;
}
.page-about .ab-coverage__media {
  margin: 0;
}
.page-about .ab-coverage__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: 34%;
  height: 3px;
  background: var(--flame);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  background: linear-gradient(180deg, var(--ink-3), var(--ink));
}
.page-about .ab-team__head {
  display: grid;
  gap: 0.9rem;
}
.page-about .ab-team__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--grey);
}
.page-about .ab-team__layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.4rem);
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}
.page-about .ab-team__media {
  margin: 0;
}
.page-about .ab-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
}
.page-about .ab-roles {
  display: grid;
  gap: 0.9rem;
}
.page-about .ab-role {
  padding: 1.2rem 1.15rem;
  background: var(--ab-panel);
  border: 1px solid var(--hair);
  border-top: 2px solid var(--cyan-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .ab-role:hover {
  border-color: var(--ab-line);
  background: rgba(14, 58, 58, 0.55);
}
.page-about .ab-role h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--snow);
}
.page-about .ab-role p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(245, 249, 255, 0.78);
}
.page-about .ab-role__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-role__tags li {
  padding: 0.22rem 0.6rem;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  background: var(--cyan-soft);
  border: 1px solid var(--cyan-line);
  border-radius: 99px;
}

/* ---------- 本地合作 ---------- */
.page-about .ab-partners {
  background: var(--ink-2);
}
.page-about .ab-partners__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}
.page-about .ab-partners__copy > p {
  margin: 0;
  line-height: 1.85;
  color: rgba(245, 249, 255, 0.82);
}
.page-about .ab-partners__list {
  list-style: none;
  margin: 1.5rem 0 1.6rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}
.page-about .ab-partners__list li {
  padding-left: 1rem;
  border-left: 2px solid var(--hair-strong);
}
.page-about .ab-partners__list li:hover {
  border-left-color: var(--cyan);
}
.page-about .ab-partners__list strong {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--snow);
}
.page-about .ab-partners__list span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--grey);
}
.page-about .ab-partners__media {
  margin: 0;
}

/* ---------- 结尾 ---------- */
.page-about .ab-next {
  background: linear-gradient(180deg, var(--ink-2), var(--ink-3));
}
.page-about .ab-next__panel {
  position: relative;
  display: grid;
  gap: 1.4rem;
  padding: clamp(1.6rem, 4.5vw, 2.6rem);
  background:
    radial-gradient(110% 140% at 88% 0%, rgba(46, 242, 198, 0.16), transparent 60%),
    var(--teal);
  overflow: hidden;
}
.page-about .ab-next__copy h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.25;
}
.page-about .ab-next__copy p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(245, 249, 255, 0.82);
}
.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 渐入 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
}
.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-about .ab-fig__more {
    max-height: none;
    opacity: 1;
    margin-top: 0.45rem;
  }
}

@media (min-width: 720px) {
  .page-about .ab-team__layout,
  .page-about .ab-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .ab-partners__media {
    order: -1;
  }
  .page-about .ab-next__panel {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
  }
  .page-about .ab-next__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }
  .page-about .ab-story__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(2rem, 5vw, 3.6rem);
  }
  .page-about .ab-timeline__head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
  .page-about .ab-timeline__hint {
    text-align: right;
  }
  .page-about .ab-track {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow: visible;
    scroll-snap-type: none;
    padding-bottom: 0.4rem;
  }
  .page-about .ab-coverage__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }
  .page-about .ab-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: end;
  }
  .page-about .ab-team__lead {
    justify-self: end;
    text-align: right;
  }
  .page-about .ab-team__layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(1.8rem, 4vw, 2.8rem);
  }
  .page-about .ab-roles {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
  .page-about .ab-partners__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .ab-node__dot {
    animation: none;
  }
  .page-about .ab-node,
  .page-about .ab-figures li {
    transition: none;
  }
}

.page-about {
  --reveal-delay: 0.3s;
}