.page-about {
  --about-line: rgba(41, 240, 196, .22);
  --about-ink-soft: rgba(232, 246, 241, .72);
  padding-bottom: 96px;
  background: var(--night-pitch);
  color: var(--text-primary);
}

/* ---------- 开篇 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 24px 0 8px;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 560px;
  background:
    radial-gradient(46% 60% at 18% 34%, rgba(41, 240, 196, .16), transparent 70%),
    radial-gradient(38% 52% at 82% 18%, rgba(255, 106, 43, .12), transparent 72%);
  pointer-events: none;
}
.page-about .about-hero > .container {
  position: relative;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 12px 0 28px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-secondary);
}
.page-about .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}
.page-about .breadcrumb a:hover { color: var(--fluoro-cyan); }
.page-about .breadcrumb__sep { color: var(--hairline); }
.page-about .breadcrumb [aria-current="page"] { color: var(--mist-cyan); }

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-kicker {
  display: inline-block;
  margin-bottom: 16px;
  padding: 5px 10px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
  border: 1px solid var(--about-line);
  border-radius: var(--r-sm);
}

.page-about h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 8.4vw, 60px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.01em;
}
.page-about .lede {
  max-width: 46ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-ink-soft);
}
.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__media {
  margin: 0;
}
.page-about .media {
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--deep-panel);
}
.page-about .media__img,
.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero__media img {
  aspect-ratio: 16 / 8;
}
.page-about .media__caption {
  display: block;
  padding: 9px 12px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--text-secondary);
  border-top: 1px solid var(--hairline);
  background: rgba(5, 16, 13, .6);
}

.page-about .about-hero__stats {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}
.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(160deg, rgba(10, 30, 25, .9), rgba(5, 16, 13, .7));
}
.page-about .stat__value {
  font-size: clamp(26px, 7vw, 38px);
  font-weight: 600;
  color: var(--mist-cyan);
  line-height: 1;
}
.page-about .stat__value .unit {
  margin-left: 2px;
  font-size: .44em;
  color: var(--text-secondary);
}
.page-about .stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ---------- 通用章节 ---------- */
.page-about .section { margin-top: clamp(56px, 9vw, 96px); }
.page-about .rule {
  border: 0;
  border-top: 1px solid var(--hairline);
  margin: 44px 0 0;
}

.page-about .route-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding-bottom: 14px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--hairline);
}
.page-about .route-head__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fluoro-cyan);
  padding: 2px 8px;
  border: 1px solid var(--about-line);
  border-radius: var(--r-sm);
}
.page-about .route-head__title {
  flex: 1 1 260px;
  margin: 0;
  font-size: clamp(22px, 5.4vw, 34px);
  font-weight: 900;
  line-height: 1.2;
}
.page-about .route-head__meta {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-secondary);
}

.page-about .duo { display: grid; grid-template-columns: 1fr; gap: 28px; }
.page-about .duo__col { min-width: 0; }

.page-about .about-note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--about-line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}
.page-about .about-note--tight { margin-top: 18px; }

.page-about .about-lede-slim {
  max-width: 68ch;
  margin: 0 0 30px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 起步章节 ---------- */
.page-about .about-origin p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}
.page-about .about-origin p:last-child { margin-bottom: 0; }

.page-about .panel {
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  background: linear-gradient(180deg, rgba(10, 30, 25, .95), rgba(5, 16, 13, .8));
}
.page-about .panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--hairline);
}
.page-about .panel__title { font-size: 15px; font-weight: 700; }
.page-about .panel__note { font-size: 11px; letter-spacing: .1em; color: var(--text-secondary); }
.page-about .panel__body { padding: 6px 16px 12px; }

.page-about .about-list { list-style: none; margin: 0; padding: 0; }
.page-about .about-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(22, 52, 44, .9);
  font-size: 14px;
  line-height: 1.6;
}
.page-about .about-list li:last-child { border-bottom: 0; }
.page-about .about-list .idx {
  flex: none;
  font-size: 11px;
  color: var(--fluoro-cyan);
}
.page-about .link-more {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .link-more:hover,
.page-about .link-more:focus-visible {
  color: var(--fluoro-cyan);
  border-color: var(--fluoro-cyan);
}

/* ---------- 数据体系 ---------- */
.page-about .data-band {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.page-about .data-band__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
}
.page-about .data-band__row:last-child { border-bottom: 0; }
.page-about .data-band__k {
  font-size: clamp(20px, 5.6vw, 26px);
  color: var(--mist-cyan);
  font-weight: 600;
}
.page-about .data-band__v {
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-secondary);
}

.page-about .data-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 34px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
.page-about .data-card {
  padding: 22px 18px;
  background: var(--night-pitch);
}
.page-about .data-card:nth-child(1) { background: linear-gradient(155deg, rgba(41, 240, 196, .1), rgba(5, 16, 13, 1) 62%); }
.page-about .data-card:nth-child(3) { background: linear-gradient(155deg, rgba(255, 106, 43, .1), rgba(5, 16, 13, 1) 62%); }
.page-about .data-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .data-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-secondary);
}

/* ---------- 团队 ---------- */
.page-about .about-team__media { margin: 0 0 24px; }
.page-about .about-team__media img { aspect-ratio: 3 / 2; }

.page-about .role-list { display: grid; gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); }
.page-about .role {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  padding: 18px 16px;
  background: var(--deep-panel);
}
.page-about .role__num {
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  color: var(--fluoro-cyan);
}
.page-about .role__body { min-width: 0; }
.page-about .role__name {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}
.page-about .role__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-secondary);
}

/* ---------- 版本演进 ---------- */
.page-about .version-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hairline);
}
.page-about .version {
  padding: 22px 0;
  border-bottom: 1px solid var(--hairline);
}
.page-about .version__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.page-about .version__year {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text-primary);
}
.page-about .badge {
  display: inline-block;
  padding: 3px 8px;
  font-size: 11px;
  letter-spacing: .08em;
  border-radius: var(--r-sm);
  border: 1px solid currentColor;
}
.page-about .badge--cyan { color: var(--fluoro-cyan); }
.page-about .badge--orange { color: var(--signal-orange); }
.page-about .version__title {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 700;
}
.page-about .version__bar {
  position: relative;
  height: 4px;
  width: var(--w, 50%);
  max-width: 100%;
  background: linear-gradient(90deg, var(--fluoro-cyan), rgba(41, 240, 196, .12));
  border-radius: 0;
}
.page-about .version:nth-child(2) .version__bar {
  background: linear-gradient(90deg, var(--mist-cyan), rgba(140, 255, 228, .1));
}
.page-about .version:nth-child(3) .version__bar {
  background: linear-gradient(90deg, var(--signal-orange), rgba(255, 106, 43, .1));
}
.page-about .version:nth-child(4) .version__bar {
  background: linear-gradient(90deg, var(--card-yellow), rgba(255, 212, 64, .1));
}
.page-about .version__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-secondary);
}

/* ---------- 覆盖地图 ---------- */
.page-about .about-map__figure { margin: 0 0 24px; }
.page-about .about-map__figure img { aspect-ratio: 5 / 6; }
.page-about .about-map .duo__col > p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

.page-about .venue-list {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--hairline);
}
.page-about .venue {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 4px 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--hairline);
}
.page-about .venue__city {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .venue__count {
  font-size: 15px;
  color: var(--fluoro-cyan);
}
.page-about .venue__note {
  grid-column: 1 / -1;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--text-secondary);
}

/* ---------- 服务保障 ---------- */
.page-about .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}
.page-about .support {
  padding-top: 16px;
  border-top: 2px solid var(--about-line);
}
.page-about .support:nth-child(2) { border-top-color: rgba(255, 106, 43, .4); }
.page-about .support__idx {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--text-secondary);
}
.page-about .support h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}
.page-about .support p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-tailnote {
  margin: 38px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--hairline);
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-secondary);
}

/* ---------- 滚动显现（无 JS 时完整可读） ---------- */
.page-about .reveal { opacity: 1; }

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .data-band__row {
    grid-template-columns: 200px 1fr;
    gap: 20px;
    align-items: baseline;
    padding: 20px 0;
  }
  .page-about .data-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .venue-list { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 28px; }
  .page-about .support-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
  .page-about .version { display: grid; grid-template-columns: 1fr; gap: 0; }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about { padding-bottom: 120px; }

  .page-about .about-hero { padding-top: 32px; }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: end;
  }
  .page-about .about-hero__stats { margin-top: 56px; }

  .page-about .duo { gap: 40px; }
  .page-about .duo--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .page-about .duo--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .page-about .duo--7-5 > .duo__col + .duo__col,
  .page-about .duo--5-7 > .duo__col + .duo__col {
    padding-left: 40px;
    border-left: 1px solid var(--hairline);
  }

  .page-about .about-team__media { margin: 0; }
  .page-about .about-map__figure { margin: 0; }

  .page-about .version {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 8px 32px;
    align-items: start;
    padding: 26px 0;
  }
  .page-about .version__head { grid-row: 1 / 3; margin-bottom: 0; flex-direction: column; align-items: flex-start; }
  .page-about .version__title { margin-bottom: 10px; }
  .page-about .version__bar { max-width: 640px; }
  .page-about .version__desc { margin-top: 12px; max-width: 62ch; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .link-more { transition: none; }
}

.page-about {
  --w: 1rem;
}