/* ================= 关于页 · 页面作用域 ================= */
.page-about {
  --about-gap: 20px;
  background: var(--ink);
  color: var(--ice);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: calc(var(--header-h) + 20px);
  padding-bottom: 6px;
}
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--moss);
}
.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--graphite);
}
.page-about .breadcrumbs__item a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-about .breadcrumbs__item a:hover,
.page-about .breadcrumbs__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .breadcrumbs__item[aria-current="page"] {
  color: var(--ice);
}

/* ---------- 首屏 ---------- */
.page-about .hero-about {
  position: relative;
  padding-bottom: 52px;
  border-bottom: var(--line) solid var(--graphite);
  background-color: var(--ink);
  background-image:
    linear-gradient(118deg, transparent 0 44%, rgba(43, 232, 198, .08) 44% 57%, transparent 57%),
    linear-gradient(118deg, transparent 0 68%, rgba(242, 176, 61, .07) 68% 76%, transparent 76%);
}

.page-about .hero-about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 26px;
}

.page-about .hero-about__copy h1 {
  margin: 12px 0 18px;
  font-size: clamp(2.1rem, 6.4vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--ice);
}

.page-about .hero-about__copy .lead {
  max-width: 34ch;
  color: var(--moss);
}

.page-about .hero-about__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-about__figure {
  margin: 0;
}

.page-about .hero-about__media {
  aspect-ratio: 14 / 9;
  border: var(--line) solid var(--graphite);
  box-shadow: var(--shadow-hard);
  background: var(--pine);
}
.page-about .hero-about__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.72) contrast(1.08);
}
.page-about .hero-about__figure .media-frame__caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--moss);
}

.page-about .hero-about__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  border: var(--line) solid var(--graphite);
  background: var(--graphite);
}
.page-about .hero-about__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink);
}
.page-about .hero-about__stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}
.page-about .hero-about__stats .stat__label {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--moss);
}

/* ---------- 通用小节标题 ---------- */
.page-about .about-h2 {
  margin: 10px 0 18px;
  font-size: clamp(1.55rem, 4.3vw, 2.55rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ice);
}
.page-about .about-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 22px;
  margin-bottom: 34px;
  border-bottom: var(--line) solid var(--graphite);
}
.page-about .about-head__note {
  max-width: 44ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--moss);
}
.page-about .prose p {
  max-width: 36ch;
  margin: 0 0 16px;
  color: var(--ice);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}
.page-about .about-origin__aside {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.page-about .about-origin__aside .note-vertical {
  color: var(--cyan);
}
.page-about .about-origin__panel {
  flex: 1 1 auto;
  min-width: 0;
  padding: 24px 22px;
  border: var(--line) solid var(--graphite);
  background: var(--ink);
}
.page-about .about-origin__panel-title {
  margin: 0 0 18px;
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--amber);
}
.page-about .origin-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-about .origin-point {
  padding-top: 14px;
  border-top: 2px solid var(--graphite);
}
.page-about .origin-point__head {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0 0 5px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--ice);
}
.page-about .origin-point__head .num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cyan);
}
.page-about .origin-point__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}
.page-about .about-team__chart {
  padding: 24px 22px;
  border: var(--line) solid var(--graphite);
  background: rgba(6, 19, 15, .5);
  box-shadow: var(--shadow-hard);
}
.page-about .about-team__chart-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--amber);
}
.page-about .team-bars {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}
.page-about .team-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-about .team-bar__name {
  font-size: 15px;
  letter-spacing: .05em;
  color: var(--ice);
}
.page-about .team-bar__count {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}
.page-about .team-bar__track {
  position: relative;
  height: 12px;
  margin-top: 9px;
  border: 2px solid var(--graphite);
  background: rgba(243, 247, 245, .1);
  overflow: hidden;
}
.page-about .team-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan-soft) 100%);
  transition: background .2s var(--ease);
}
.page-about .team-bar:nth-child(1) .team-bar__fill { width: 42%; }
.page-about .team-bar:nth-child(2) .team-bar__fill { width: 35%; }
.page-about .team-bar:nth-child(3) .team-bar__fill { width: 23%; }
.page-about .team-bar:hover .team-bar__fill,
.page-about .team-bar:focus-within .team-bar__fill {
  background: linear-gradient(90deg, var(--amber) 0%, #ffd479 100%);
}
.page-about .team-bar__note {
  margin: 9px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
  opacity: .72;
  transition: opacity .2s var(--ease);
}
.page-about .team-bar:hover .team-bar__note,
.page-about .team-bar:focus-within .team-bar__note {
  opacity: 1;
}

/* ---------- 内容结构 ---------- */
.page-about .about-structure__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}
.page-about .about-structure__figure {
  margin: 0;
}
.page-about .about-structure__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--line) solid var(--graphite);
  box-shadow: var(--shadow-hard);
  background: var(--ink);
}
.page-about .about-structure__figure .media-frame__caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--moss);
}
.page-about .layer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--graphite);
  border: var(--line) solid var(--graphite);
}
.page-about .layer-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 18px;
  background: var(--indigo);
  transition: background .2s var(--ease);
}
.page-about .layer-item:hover,
.page-about .layer-item:focus-within {
  background: #372a55;
}
.page-about .layer-item__index {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
  padding-top: 2px;
}
.page-about .layer-item__title {
  margin: 0 0 6px;
  font-size: 16px;
  letter-spacing: .06em;
  color: var(--ice);
}
.page-about .layer-item__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--moss);
}

/* ---------- 历程时间轴 ---------- */
.page-about .about-history__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}
.page-about .about-history__head {
  position: relative;
  padding-right: 34px;
}
.page-about .about-history__note-text {
  max-width: 34ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--moss);
}
.page-about .about-history__note {
  position: absolute;
  top: 4px;
  right: 6px;
  color: var(--amber);
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 34px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(43, 232, 198, .12) 100%);
}
.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 36px;
}
.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 14px;
  height: 14px;
  border: var(--line) solid var(--cyan);
  background: var(--ink);
  transition: background .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .timeline__item.is-visible::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(43, 232, 198, .14);
}
.page-about .timeline__year {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--amber);
}
.page-about .timeline__title {
  margin: 0 0 7px;
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--ice);
}
.page-about .timeline__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--moss);
}

/* ---------- 数据规范 ---------- */
.page-about .about-data__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}
.page-about .about-data__figure {
  margin: 0;
}
.page-about .about-data__media {
  aspect-ratio: 3 / 2;
  border: var(--line) solid var(--graphite);
  box-shadow: var(--shadow-hard);
  background: var(--ink);
}
.page-about .about-data__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.6) contrast(1.1);
}
.page-about .about-data__figure .media-frame__caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--moss);
}
.page-about .data-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}
.page-about .data-fields .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

/* ---------- 生态 ---------- */
.page-about .eco-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: var(--line) solid var(--graphite);
  background: var(--graphite);
}
.page-about .eco-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  padding: 26px 20px;
  background: var(--ink);
  transition: background .2s var(--ease);
}
.page-about .eco-item:hover {
  background: var(--pine);
}
.page-about .eco-item__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}
.page-about .eco-item__body h3 {
  margin: 0 0 8px;
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--ice);
}
.page-about .eco-item__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--moss);
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  position: relative;
  border-top: var(--line) solid var(--graphite);
  background:
    linear-gradient(90deg, rgba(43, 232, 198, .1) 0 34%, transparent 34%),
    var(--deep);
}
.page-about .about-close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}
.page-about .about-close__copy .lead {
  max-width: 38ch;
  color: var(--moss);
}
.page-about .about-close__links {
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-about .about-close__links .btn {
  text-align: center;
}
.page-about .about-close__hint {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--moss);
}

/* ---------- 滚动渐显 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .26s var(--ease), transform .26s var(--ease);
  }
  .page-about [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ================= 响应式 ================= */
@media (min-width: 720px) {
  .page-about .hero-about__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 32ch);
    align-items: end;
    gap: 26px;
  }
  .page-about .eco-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .eco-item {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 980px) {
  .page-about .hero-about {
    padding-bottom: 64px;
  }
  .page-about .hero-about__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 46px;
    align-items: start;
    padding-top: 34px;
  }
  .page-about .hero-about__stats {
    grid-column: 1 / -1;
    margin-top: 10px;
  }
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 52px;
    align-items: start;
  }
  .page-about .about-structure__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: start;
  }
  .page-about .about-history__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .about-history__head {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }
  .page-about .about-close__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
  }
  .page-about .about-close__links .btn {
    text-align: left;
    padding-inline: 22px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}
<<<END>>>