.page-about {
  --about-scale-w: 104px;
  --about-gap: clamp(20px, 4vw, 40px);
  background: var(--ink);
  color: var(--cloud);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--head-h) + 28px);
}

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

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(22px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 100% at 6% 0%, rgba(255, 106, 26, 0.18), transparent 58%),
    radial-gradient(90% 90% at 100% 100%, rgba(53, 240, 166, 0.10), transparent 62%),
    var(--glass);
  backdrop-filter: blur(6px);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 64px);
  line-height: 1.08;
  color: var(--ivory);
  letter-spacing: -0.01em;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  color: var(--cloud);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-2);
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-numeric);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.1;
  color: var(--ivory);
}

.page-about .about-hero__stats .stat__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .about-hero__figure {
  margin: clamp(28px, 4.5vw, 52px) 0 0;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding-top: clamp(56px, 8vw, 104px);
}

.page-about .about-timeline__body {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-scale {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-scale__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--glass);
  color: var(--steel);
  text-decoration: none;
  font-family: var(--font-rail);
  letter-spacing: 0.08em;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-scale__year {
  font-family: var(--font-numeric);
  font-size: 14px;
  color: var(--orange-2);
}

.page-about .about-scale__label {
  font-size: 13px;
}

.page-about .about-scale__item:hover {
  border-color: var(--orange);
  color: var(--ivory);
}

.page-about .about-chron {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-chron__item {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--r-md);
  background:
    linear-gradient(100deg, rgba(255, 106, 26, 0.08), transparent 42%),
    var(--ink-2);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-chron__item:hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.page-about .about-chron__year {
  display: block;
  font-family: var(--font-numeric);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--green);
}

.page-about .about-chron__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.8vw, 26px);
  line-height: 1.32;
  color: var(--ivory);
}

.page-about .about-chron__text {
  margin: 10px 0 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-chron__tags {
  margin-top: 14px;
}

.page-about .about-timeline__links {
  margin: clamp(26px, 4vw, 40px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-link {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-link:hover {
  color: var(--orange-2);
  border-color: var(--orange);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: clamp(56px, 8vw, 104px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-team__copy .section__title {
  margin-top: 12px;
}

.page-about .about-team__copy .prose {
  margin-top: 16px;
  color: var(--steel);
}

.page-about .about-team__stats {
  margin-top: clamp(22px, 3vw, 32px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-team__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(11, 27, 60, 0.72);
}

.page-about .about-team__stat-num {
  font-family: var(--font-numeric);
  font-size: clamp(20px, 3vw, 26px);
  color: var(--green);
}

.page-about .about-team__stat-label {
  font-size: 13px;
  color: var(--steel);
}

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

.page-about .about-team__roles {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 2px solid var(--orange);
}

.page-about .about-role__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--ivory);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 通讯员网络 ---------- */
.page-about .about-network {
  padding-top: clamp(56px, 8vw, 104px);
}

.page-about .about-network__body {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-network__map {
  position: relative;
  padding: clamp(14px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(70% 70% at 50% 50%, rgba(53, 240, 166, 0.10), transparent 72%),
    var(--ink-2);
}

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

.page-about .about-net__ring {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 4 7;
}

.page-about .about-net__line {
  stroke: var(--line-2);
  stroke-width: 1;
  transition: stroke 180ms var(--ease), stroke-width 180ms var(--ease);
}

.page-about .about-net__node {
  fill: var(--green);
  transform-box: fill-box;
  transform-origin: center;
  animation: about-node-pulse 3.2s var(--ease) infinite;
}

.page-about .about-net-node:nth-child(3) .about-net__node { animation-delay: 0.4s; }
.page-about .about-net-node:nth-child(4) .about-net__node { animation-delay: 0.8s; }
.page-about .about-net-node:nth-child(5) .about-net__node { animation-delay: 1.2s; }
.page-about .about-net-node:nth-child(6) .about-net__node { animation-delay: 1.6s; }
.page-about .about-net-node:nth-child(7) .about-net__node { animation-delay: 2.0s; }
.page-about .about-net-node:nth-child(8) .about-net__node { animation-delay: 2.4s; }
.page-about .about-net-node:nth-child(9) .about-net__node { animation-delay: 2.8s; }

.page-about .about-net-node:hover .about-net__line {
  stroke: var(--orange);
  stroke-width: 2;
}

.page-about .about-net-node:hover .about-net__node {
  fill: var(--orange-2);
}

.page-about .about-net__core {
  fill: var(--orange);
}

.page-about .about-net__core-pulse {
  fill: none;
  stroke: var(--orange);
  stroke-width: 1.5;
  opacity: 0.5;
  transform-box: fill-box;
  transform-origin: center;
  animation: about-core-pulse 3.2s var(--ease) infinite;
}

@keyframes about-node-pulse {
  0%, 100% { opacity: 0.55; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.35); }
}

@keyframes about-core-pulse {
  0%, 100% { opacity: 0.45; transform: scale(1); }
  50% { opacity: 0.1; transform: scale(2.4); }
}

.page-about .about-network__copy .prose {
  margin: 0;
  color: var(--steel);
}

.page-about .about-network__stats {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-network__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(11, 27, 60, 0.72);
}

.page-about .about-network__stats .stat__value {
  font-family: var(--font-numeric);
  font-size: clamp(20px, 3vw, 26px);
  color: var(--ivory);
}

.page-about .about-network__stats .stat__value--green {
  color: var(--green);
}

.page-about .about-network__stats .stat__label {
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-network__figure {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  max-width: 420px;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding-top: clamp(56px, 8vw, 104px);
}

.page-about .about-partners__grid {
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-partner {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-partner__num {
  font-family: var(--font-numeric);
  font-size: clamp(34px, 5.4vw, 52px);
  line-height: 1;
  color: var(--orange);
}

.page-about .about-partner__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 23px);
  color: var(--ivory);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-partner__tags {
  margin-top: 4px;
}

/* ---------- 资质与联络 ---------- */
.page-about .about-legal {
  padding: clamp(56px, 8vw, 104px) 0 clamp(56px, 8vw, 96px);
}

.page-about .about-legal__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-legal__copy .section__title {
  margin-top: 12px;
}

.page-about .about-legal__copy .prose {
  margin: 16px 0 0;
  color: var(--steel);
}

.page-about .about-actions {
  margin-top: clamp(22px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-legal__panel {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(160deg, rgba(255, 106, 26, 0.12), transparent 55%),
    var(--ink-2);
  overflow: hidden;
}

.page-about .about-legal__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding: 16px clamp(16px, 2.6vw, 24px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-legal__row:last-child {
  border-bottom: 0;
}

.page-about .about-legal__label {
  font-family: var(--font-rail);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .about-legal__value {
  font-size: 15px;
  color: var(--ivory);
}

.page-about .about-legal__value.numeric {
  font-family: var(--font-numeric);
  color: var(--green);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline__body {
    grid-template-columns: var(--about-scale-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-scale {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--head-h) + 32px);
    align-self: start;
    border-left: 1px solid var(--line);
  }

  .page-about .about-scale__item {
    display: block;
    padding: 12px 0 12px 18px;
    border: 0;
    border-radius: 0;
    background: none;
    position: relative;
  }

  .page-about .about-scale__item::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 0;
    background: linear-gradient(180deg, var(--orange), var(--green));
    transition: height 220ms var(--ease);
  }

  .page-about .about-scale__item:hover::before {
    height: 100%;
  }

  .page-about .about-scale__label {
    display: block;
    margin-top: 2px;
    font-size: 12px;
    letter-spacing: 0.12em;
    color: var(--steel);
  }

  .page-about .about-chron__item:nth-child(odd) {
    margin-right: clamp(0px, 3vw, 48px);
  }

  .page-about .about-chron__item:nth-child(even) {
    margin-left: clamp(24px, 5vw, 80px);
  }

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

  .page-about .about-network__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-network__figure {
    margin-left: auto;
  }

  .page-about .about-legal__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero__frame {
    padding: clamp(36px, 4vw, 60px);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-net__node,
  .page-about .about-net__core-pulse {
    animation: none;
  }

  .page-about .about-chron__item,
  .page-about .about-scale__item,
  .page-about .about-scale__item::before,
  .page-about .about-net__line,
  .page-about .about-link {
    transition: none;
  }
}