.page-about {
  --p-panel: var(--tactic);
  --p-rule: var(--line);
  --p-accent: var(--cyan);
  --p-warm: var(--coral);
  --p-dim: var(--muted);
  background: var(--deep);
  color: var(--text);
}

/* ---------- 序言 ---------- */
.page-about .p-about-lead {
  position: relative;
  overflow: hidden;
  padding: calc(var(--mast-h) + clamp(30px, 6vw, 76px)) 0 clamp(42px, 7vw, 92px);
  border-bottom: 1px solid var(--p-rule);
  background:
    radial-gradient(112% 82% at 92% 2%, rgba(63, 224, 208, 0.16), transparent 60%),
    radial-gradient(78% 66% at 4% 98%, rgba(255, 122, 89, 0.11), transparent 64%),
    linear-gradient(180deg, var(--deep) 0%, var(--mid) 68%, var(--deep) 100%);
}

.page-about .p-about-lead::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(159, 240, 230, 0.035) 0 1px, transparent 1px 92px);
}

.page-about .p-about-lead > .shell {
  position: relative;
  z-index: 1;
}

.page-about .p-about-lead__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 62px);
  margin-top: clamp(22px, 4vw, 42px);
}

.page-about .p-about-lead h1 {
  margin: 14px 0 22px;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6.2vw, 3.9rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .p-about-lede {
  max-width: 34em;
  margin: 0;
  font-size: 1rem;
  line-height: 1.95;
  color: var(--text);
}

.page-about .p-about-lede__sub {
  max-width: 34em;
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--p-accent);
  font-size: 0.86rem;
  line-height: 1.9;
  color: var(--p-dim);
}

.page-about .p-about-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--p-rule);
  border: 1px solid var(--p-rule);
}

.page-about .p-about-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: linear-gradient(180deg, rgba(11, 36, 54, 0.94), rgba(5, 18, 31, 0.9));
}

.page-about .p-about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--p-accent);
}

.page-about .p-about-facts__label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--p-dim);
}

/* ---------- 通用章节骨架 ---------- */
.page-about .p-about-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  padding: 6px 14px 6px 10px;
  border: 1px solid var(--p-rule);
  background: rgba(11, 36, 54, 0.66);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--p-dim);
}

.page-about .p-about-label span {
  color: var(--p-accent);
}

.page-about .p-about-label--paper {
  border-color: rgba(242, 247, 250, 0.28);
  background: rgba(242, 247, 250, 0.08);
  color: rgba(242, 247, 250, 0.72);
}

.page-about .p-about-label--paper span {
  color: var(--p-warm);
}

.page-about .p-about-head {
  max-width: 62em;
}

.page-about .p-about-head--flush {
  max-width: none;
}

.page-about .p-about-head h2,
.page-about .p-about-team h2,
.page-about .p-about-data h2,
.page-about .p-about-history h2,
.page-about .p-about-region h2 {
  margin: 0 0 18px;
  font-size: clamp(1.4rem, 3.6vw, 2.15rem);
  line-height: 1.24;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .p-about-intro {
  max-width: 40em;
  margin: 0 0 14px;
  font-size: 0.94rem;
  line-height: 1.92;
  color: var(--p-dim);
}

.page-about .p-about-intro:last-child {
  margin-bottom: 0;
}

/* ---------- 品牌起点 ---------- */
.page-about .p-about-origin {
  border-bottom: 1px solid rgba(22, 55, 79, 0.6);
}

.page-about .p-about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 58px);
  align-items: start;
}

.page-about .p-about-prose {
  border-left: 1px solid var(--p-rule);
  padding-left: clamp(16px, 2.6vw, 30px);
}

.page-about .p-about-prose p {
  max-width: 34em;
  margin: 0 0 1.1em;
  font-size: 1rem;
  line-height: 1.95;
  color: var(--text);
}

.page-about .p-about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .p-about-prose a {
  color: var(--p-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.42);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .p-about-prose a:hover {
  color: var(--mist);
  border-color: var(--mist);
}

.page-about .p-about-figure {
  margin: 0;
}

.page-about .p-about-figure .media-frame {
  border: 1px solid var(--p-rule);
}

.page-about .p-about-caption {
  margin: 14px 0 0;
  font-size: 0.74rem;
  line-height: 1.75;
  letter-spacing: 0.05em;
  color: var(--p-dim);
}

.page-about .p-about-caption::before {
  content: "图注 / ";
  color: var(--p-accent);
  font-family: var(--font-mono);
}

/* ---------- 团队构成 ---------- */
.page-about .p-about-team {
  border-bottom: 1px solid rgba(22, 55, 79, 0.6);
}

.page-about .p-about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .p-about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .p-about-role {
  padding: 16px 18px;
  border: 1px solid var(--p-rule);
  background: linear-gradient(90deg, rgba(11, 36, 54, 0.92), rgba(5, 18, 31, 0.72));
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .p-about-role:hover,
.page-about .p-about-role:focus-within {
  border-color: rgba(63, 224, 208, 0.55);
  background: linear-gradient(90deg, rgba(14, 58, 92, 0.92), rgba(5, 18, 31, 0.7));
}

.page-about .p-about-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.page-about .p-about-role__name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .p-about-role__num {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--p-accent);
}

.page-about .p-about-role__track {
  position: relative;
  height: 6px;
  margin-top: 12px;
  background: rgba(22, 55, 79, 0.9);
  overflow: hidden;
}

.page-about .p-about-role__fill {
  display: block;
  height: 100%;
  transform-origin: left center;
  background: linear-gradient(90deg, var(--mid), var(--cyan) 78%, var(--mist));
  animation: p-about-grow 0.7s var(--ease) both;
}

@keyframes p-about-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.page-about .p-about-role__note {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 0.8rem;
  line-height: 1.78;
  color: var(--p-dim);
  transition: max-height 0.34s var(--ease), opacity 0.3s var(--ease), margin-top 0.34s var(--ease);
}

.page-about .p-about-role:hover .p-about-role__note,
.page-about .p-about-role:focus-within .p-about-role__note {
  max-height: 8em;
  opacity: 1;
  margin-top: 10px;
}

@media (hover: none) {
  .page-about .p-about-role__note {
    max-height: 8em;
    opacity: 1;
    margin-top: 10px;
  }
}

/* ---------- 数据体系 ---------- */
.page-about .p-about-data {
  border-bottom: 1px solid rgba(22, 55, 79, 0.6);
  background:
    radial-gradient(90% 60% at 8% 0%, rgba(14, 58, 92, 0.55), transparent 68%),
    var(--deep);
}

.page-about .p-about-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  padding: 1px;
  background: var(--p-rule);
  border: 1px solid var(--p-rule);
}

.page-about .p-about-metric {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 24px;
  background: linear-gradient(180deg, rgba(11, 36, 54, 0.94), rgba(5, 18, 31, 0.9));
}

.page-about .p-about-metric__k {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--p-warm);
}

.page-about .p-about-metric__t {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.page-about .p-about-metric__d {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--p-dim);
}

.page-about .p-about-dims {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .p-about-dims__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--p-dim);
}

.page-about .p-about-dims__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-about .p-about-dims__list .chip {
  border-color: rgba(63, 224, 208, 0.32);
  color: var(--mist);
}

/* ---------- 发展历程 ---------- */
.page-about .p-about-history {
  overflow: hidden;
  background: linear-gradient(180deg, var(--deep), rgba(14, 58, 92, 0.42), var(--deep));
}

.page-about .p-about-timeline {
  position: relative;
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .p-about-track {
  position: relative;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 54px 2px 16px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .p-about-track::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 2px;
  right: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--p-rule), var(--p-accent) 14%, var(--p-accent) 60%, rgba(22, 55, 79, 0.35));
  opacity: 0.8;
  pointer-events: none;
}

.page-about .p-about-node {
  flex: 0 0 min(268px, 76vw);
  scroll-snap-align: start;
  border: 1px solid var(--p-rule);
  background: linear-gradient(180deg, rgba(11, 36, 54, 0.94), rgba(5, 18, 31, 0.88));
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .p-about-node:hover {
  border-color: rgba(63, 224, 208, 0.5);
}

.page-about .p-about-node[data-open] {
  border-color: var(--p-accent);
  box-shadow: 0 0 0 1px rgba(63, 224, 208, 0.22);
}

.page-about .p-about-node__trigger {
  position: relative;
  display: block;
  width: 100%;
  min-height: 104px;
  padding: 20px 18px 16px;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .p-about-node__dot {
  position: absolute;
  top: -22px;
  left: 16px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--p-accent);
  box-shadow: 0 0 0 5px rgba(63, 224, 208, 0.1);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .p-about-node:hover .p-about-node__dot,
.page-about .p-about-node[data-open] .p-about-node__dot {
  background: var(--p-warm);
  border-color: var(--p-warm);
  box-shadow: 0 0 0 6px rgba(255, 122, 89, 0.16);
}

.page-about .p-about-node__step {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--p-dim);
  margin-bottom: 8px;
}

.page-about .p-about-node__title {
  display: block;
  padding-right: 22px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-about .p-about-node .expand__sign {
  position: absolute;
  right: 16px;
  bottom: 16px;
  color: var(--p-accent);
}

.page-about .p-about-node .expand__inner {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--p-rule);
  font-size: 0.8rem;
  line-height: 1.85;
  color: var(--p-dim);
}

.page-about .p-about-node .expand__inner p {
  margin: 0;
}

.page-about .p-about-node .expand__inner a {
  color: var(--p-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.4);
}

/* ---------- 区域服务 ---------- */
.page-about .p-about-region {
  border-top: 1px solid rgba(22, 55, 79, 0.6);
}

.page-about .p-about-region__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .p-about-figure--map .media-frame {
  border: 1px solid var(--p-rule);
  background: radial-gradient(120% 90% at 30% 10%, rgba(63, 224, 208, 0.1), transparent 62%);
}

.page-about .p-about-filter {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .p-about-cities {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr));
  gap: 12px;
  margin-top: 18px;
}

.page-about .p-about-city {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 18px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .p-about-city::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 2px;
  background: linear-gradient(90deg, var(--p-accent), transparent);
}

.page-about .p-about-city:hover {
  border-color: rgba(63, 224, 208, 0.55);
  transform: translateY(-2px);
}

.page-about .p-about-city__name {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.page-about .p-about-city__text {
  margin: 0;
  flex: 1;
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--p-dim);
}

.page-about .p-about-city__tag {
  align-self: flex-start;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--mist);
  border-color: rgba(63, 224, 208, 0.28);
}

/* ---------- 合作生态 ---------- */
.page-about .p-about-coop {
  padding: clamp(44px, 8vw, 96px) 0 clamp(48px, 8vw, 88px);
  background:
    radial-gradient(90% 70% at 12% 4%, rgba(63, 224, 208, 0.14), transparent 62%),
    linear-gradient(180deg, var(--deep), var(--mid) 58%, var(--deep));
  border-top: 1px solid var(--p-rule);
}

.page-about .p-about-coop__panel {
  border: 1px solid rgba(63, 224, 208, 0.26);
  padding: clamp(26px, 5vw, 54px);
  background: linear-gradient(150deg, rgba(11, 36, 54, 0.86), rgba(5, 18, 31, 0.94));
}

.page-about .p-about-coop__head h2 {
  margin: 0 0 16px;
  max-width: 22em;
  font-size: clamp(1.4rem, 3.6vw, 2.05rem);
  line-height: 1.3;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .p-about-coop__intro {
  max-width: 40em;
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.92;
  color: var(--p-dim);
}

.page-about .p-about-coop__list {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 1px;
  background: rgba(63, 224, 208, 0.16);
}

.page-about .p-about-coop__item {
  padding: 20px 18px;
  background: rgba(5, 18, 31, 0.72);
}

.page-about .p-about-coop__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--p-warm);
  margin-bottom: 8px;
}

.page-about .p-about-coop__item h3 {
  margin: 0 0 8px;
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .p-about-coop__item p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.78;
  color: var(--p-dim);
}

.page-about .p-about-coop__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 38px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .p-about-origin .p-about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

  .page-about .p-about-team__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .p-about-region__top {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.85fr);
  }

  .page-about .p-about-coop__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .p-about-lead__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-about .p-about-facts {
    align-self: end;
  }

  .page-about .p-about-origin .p-about-split {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-about .p-about-figure--narrow {
    position: sticky;
    top: calc(var(--mast-h) + 32px);
  }

  .page-about .p-about-track {
    padding-bottom: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .p-about-role__fill {
    animation: none;
    transform: none;
  }

  .page-about .p-about-city,
  .page-about .p-about-role,
  .page-about .p-about-node {
    transition: none;
  }
}