.page-about {
  --about-hair: rgba(232, 241, 242, .14);
  --about-cyan-soft: rgba(95, 224, 208, .28);
  --about-flare-soft: rgba(242, 87, 63, .22);
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(2.4rem, 6vw, 4.6rem);
  background:
    radial-gradient(120% 80% at 86% 0%, rgba(95, 224, 208, .13), transparent 62%),
    radial-gradient(90% 70% at 4% 14%, rgba(242, 87, 63, .11), transparent 58%),
    linear-gradient(165deg, var(--ink) 0%, var(--ink-2) 58%, var(--pitch) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(130% 88% at 24% 6%, #000 18%, transparent 76%);
  mask-image: radial-gradient(130% 88% at 24% 6%, #000 18%, transparent 76%);
  pointer-events: none;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 2;
}

.page-about .arena-arcs {
  position: absolute;
  left: -16%;
  right: -16%;
  bottom: -36%;
  height: 78%;
  z-index: 1;
  pointer-events: none;
}

.page-about .arena-arcs span {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 100%;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  border-top: 1px solid var(--about-cyan-soft);
}

.page-about .arena-arcs span:nth-child(2) {
  left: 8%;
  right: 8%;
  height: 82%;
  border-top-color: rgba(255, 200, 87, .22);
}

.page-about .arena-arcs span:nth-child(3) {
  left: 18%;
  right: 18%;
  height: 62%;
  border-top-color: var(--about-flare-soft);
}

.page-about .about-hero h1 {
  margin: .8rem 0 1.1rem;
  max-width: 17ch;
  font-size: clamp(2.1rem, 8.4vw, 5.4rem);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -.02em;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--signal);
}

.page-about .about-hero .lead {
  max-width: 62ch;
  color: var(--paper);
  opacity: .92;
}

.page-about .hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-facts li {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .5rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(18, 59, 58, .5);
  font-size: .84rem;
}

.page-about .hero-facts .num {
  font-family: var(--font-num);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .hero-media {
  margin: clamp(2rem, 5vw, 3.2rem) 0 0;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}

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

/* ---------- 起点 ---------- */
.page-about .origin-layout {
  display: grid;
  gap: 1.6rem;
}

.page-about .origin-quote {
  margin: 1.6rem 0 0;
  padding-left: 1.1rem;
  border-left: 3px solid var(--flare);
  font-size: clamp(1.1rem, 3.4vw, 1.5rem);
  line-height: 1.5;
  font-weight: 600;
}

.page-about .origin-body p {
  color: var(--paper);
  opacity: .88;
}

/* ---------- 版图 ---------- */
.page-about .coverage-lead {
  max-width: 64ch;
}

.page-about .city-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .6rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .city-node {
  position: relative;
  overflow: hidden;
  padding: .95rem 1rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(18, 59, 58, .6), rgba(14, 42, 58, .6));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .city-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-about .city-node:hover,
.page-about .city-node:focus-visible {
  border-color: rgba(95, 224, 208, .55);
  transform: translateY(-3px);
}

.page-about .city-node:hover::before,
.page-about .city-node:focus-visible::before {
  transform: scaleY(1);
}

.page-about .city-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .city-name {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .city-meta {
  display: block;
  margin-top: .3rem;
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.page-about .city-node:hover .city-meta,
.page-about .city-node:focus-visible .city-meta {
  color: var(--signal);
}

.page-about .city-node-home {
  border-color: rgba(242, 87, 63, .45);
}

.page-about .city-node-home .city-meta {
  color: var(--flare);
}

.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem;
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
}

.page-about .coverage-stat {
  padding: 1.15rem 1.05rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(14, 42, 58, .62);
}

.page-about .coverage-stat .num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.55rem, 5.4vw, 2.15rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--signal);
}

.page-about .coverage-stat span:last-child {
  display: block;
  margin-top: .4rem;
  font-size: .8rem;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .coverage-note {
  margin: 1.6rem 0 0;
  max-width: 62ch;
  font-size: .95rem;
  color: var(--mist);
  line-height: 1.75;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1.6rem;
}

.page-about .team-media {
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
}

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

.page-about .team-copy > p {
  color: var(--paper);
  opacity: .88;
}

.page-about .team-roles {
  display: grid;
  gap: .85rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-roles li {
  position: relative;
  padding-left: 1.5rem;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--paper);
  opacity: .9;
}

.page-about .team-roles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(95, 224, 208, .14);
}

.page-about .team-roles strong {
  color: var(--signal);
  font-weight: 700;
}

.page-about .team-foot {
  margin: 1.4rem 0 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
  font-size: .92rem;
  color: var(--mist);
  line-height: 1.75;
}

/* ---------- 历程 ---------- */
.page-about .milestone-layout {
  display: grid;
  gap: 1.8rem;
  margin-top: 1.8rem;
}

.page-about .timeline-time {
  font-family: var(--font-num);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--signal);
}

.page-about .timeline-item h3 {
  margin: .3rem 0 .45rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .timeline-item p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .milestone-media {
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
}

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

/* ---------- 伙伴 ---------- */
.page-about .eco-lead {
  max-width: 62ch;
}

.page-about .eco-list {
  display: grid;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .eco-list li {
  display: grid;
  gap: .5rem;
  padding: 1.45rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .eco-key {
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .eco-list p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--paper);
  opacity: .88;
}

/* ---------- 结尾 ---------- */
.page-about .cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(1.8rem, 6vw, 3.4rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(105% 130% at 88% 8%, rgba(242, 87, 63, .26), transparent 62%),
    radial-gradient(90% 120% at 6% 100%, rgba(95, 224, 208, .16), transparent 60%),
    linear-gradient(140deg, var(--pitch) 0%, var(--ink-2) 58%, var(--ink) 100%);
}

.page-about .cta-panel h2 {
  margin: 0 0 .7rem;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .cta-panel p {
  margin: 0;
  max-width: 60ch;
  font-size: .98rem;
  line-height: 1.78;
  color: var(--paper);
  opacity: .88;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.5rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .city-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .coverage-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .eco-list li {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 1.6rem;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .origin-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    gap: clamp(2rem, 6vw, 5rem);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .city-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .milestone-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .milestone-media {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .city-node,
  .page-about .city-node::before,
  .page-about .city-meta {
    transition: none;
  }

  .page-about .city-node:hover,
  .page-about .city-node:focus-visible {
    transform: none;
  }
}