.page-about {
  --about-line: rgba(35, 224, 206, 0.18);
  --about-line-soft: rgba(35, 224, 206, 0.08);
  --about-card: rgba(12, 38, 32, 0.72);
  --about-radius: 14px;
  position: relative;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 20px 0 0;
  font-size: 0.86rem;
  color: var(--muted);
}
.page-about .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  text-decoration: underline;
}
.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--muted);
  opacity: 0.6;
}
.page-about .breadcrumb-current {
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: 28px;
  padding: 56px 0 64px;
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(110% 80% at 88% 4%, rgba(35, 224, 206, 0.13), transparent 62%),
    radial-gradient(80% 70% at 4% 96%, rgba(59, 42, 107, 0.4), transparent 66%),
    linear-gradient(180deg, rgba(18, 59, 51, 0.55), rgba(5, 19, 15, 0.2));
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--lime), transparent);
  opacity: 0.5;
}
.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: end;
}
.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(2rem, 8.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 20ch;
}
.page-about .hero-lede {
  margin: 0;
  max-width: 44ch;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--muted);
}
.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  background: var(--about-line-soft);
  overflow: hidden;
}
.page-about .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(5, 19, 15, 0.72);
}
.page-about .fact-label {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--muted);
}
.page-about .fact-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.page-about .fact-unit {
  margin-left: 3px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: 72px 0;
}
.page-about .section-head {
  max-width: 62ch;
  margin-bottom: 40px;
}
.page-about .section-title {
  margin: 10px 0 14px;
  font-family: var(--font-head);
  font-size: clamp(1.55rem, 5.4vw, 2.3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}
.page-about .section-lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}
.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ---------- 图片容器 ---------- */
.page-about .figure {
  margin: 0;
}
.page-about .figure-media {
  position: relative;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(18, 59, 51, 0.9), rgba(5, 19, 15, 0.9));
}
.page-about .figure-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(35, 224, 206, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 224, 206, 0.09) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 1;
}
.page-about .figure-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .figure-caption {
  margin-top: 12px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}
.page-about .timeline-figure {
  margin-bottom: 52px;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), var(--cyan) 40%, rgba(35, 224, 206, 0.12));
}
.page-about .timeline-item {
  position: relative;
  padding-bottom: 46px;
}
.page-about .timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .timeline-node {
  position: absolute;
  left: -30px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--lime);
  box-shadow: 0 0 0 6px rgba(233, 255, 92, 0.08);
}
.page-about .timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
  margin-bottom: 10px;
}
.page-about .timeline-name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .timeline-text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 折叠面板 ---------- */
.page-about .fold {
  margin-top: 16px;
  max-width: 62ch;
  border: 1px solid var(--about-line);
  border-radius: 12px;
  background: rgba(12, 38, 32, 0.55);
  transition: border-color 200ms ease, background-color 200ms ease;
}
.page-about .fold:hover {
  border-color: var(--cy-40);
}
.page-about .fold > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cyan);
  cursor: pointer;
  list-style: none;
}
.page-about .fold > summary::-webkit-details-marker {
  display: none;
}
.page-about .fold > summary::before {
  content: "+";
  flex: none;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  text-align: center;
  color: var(--lime);
}
.page-about .fold[open] > summary::before {
  content: "–";
}
.page-about .fold > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 12px;
}
.page-about .fold > p {
  margin: 0;
  padding: 0 16px 16px 44px;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-section {
  background: linear-gradient(
    180deg,
    rgba(59, 42, 107, 0) 0%,
    rgba(59, 42, 107, 0.38) 16%,
    rgba(59, 42, 107, 0.38) 84%,
    rgba(59, 42, 107, 0) 100%
  );
}
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .team-figure .figure-media img {
  aspect-ratio: 14 / 9;
}
.page-about .team-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .role-card {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  background: var(--about-card);
  transition: transform 220ms ease, border-color 220ms ease;
}
.page-about .role-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--cyan);
}
.page-about .role-card--orange::before { background: var(--orange); }
.page-about .role-card--lime::before { background: var(--lime); }
.page-about .role-card--wine::before { background: var(--wine); }
.page-about .role-card:hover {
  transform: translateY(-2px);
  border-color: var(--cy-40);
}
.page-about .role-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.page-about .role-unit {
  margin-left: 3px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cyan);
}
.page-about .role-name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .role-desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 核对流程 ---------- */
.page-about .audit-section {
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
  background:
    radial-gradient(90% 100% at 0% 0%, rgba(140, 31, 69, 0.28), transparent 62%),
    linear-gradient(180deg, rgba(12, 38, 32, 0.5), rgba(5, 19, 15, 0.2));
}
.page-about .audit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about .audit-note {
  margin: 18px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 14px;
  border-left: 2px solid var(--wine);
}
.page-about .audit-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .fold--step {
  margin-top: 0;
  max-width: none;
  background: rgba(5, 19, 15, 0.55);
}
.page-about .fold--step > summary {
  font-size: 0.98rem;
  color: var(--text);
  padding: 15px 18px;
  gap: 14px;
}
.page-about .fold--step > summary::before {
  content: "›";
  font-size: 1.2rem;
  color: var(--orange);
  transition: transform 200ms ease;
}
.page-about .fold--step[open] > summary::before {
  content: "›";
  transform: rotate(90deg);
}
.page-about .step-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
}
.page-about .fold--step > p {
  padding-left: 66px;
  color: var(--muted);
}

/* ---------- 场馆资料库 ---------- */
.page-about .venues-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.page-about .venues-copy p {
  margin: 0 0 16px;
  max-width: 46ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--muted);
}
.page-about .venue-points {
  list-style: none;
  margin: 24px 0 26px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .venue-points li {
  position: relative;
  padding-left: 34px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text);
}
.page-about .vp-key {
  position: absolute;
  left: 0;
  top: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--cyan);
}
.page-about .venue-points li:nth-child(2) .vp-key {
  background: var(--lime);
}
.page-about .venue-points li:nth-child(3) .vp-key {
  background: var(--orange);
}

/* ---------- 合作生态 ---------- */
.page-about .partners-section {
  background: linear-gradient(
    180deg,
    rgba(59, 42, 107, 0) 0%,
    rgba(59, 42, 107, 0.42) 14%,
    rgba(59, 42, 107, 0.42) 86%,
    rgba(59, 42, 107, 0) 100%
  );
}
.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .partner-card {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  background: rgba(5, 19, 15, 0.66);
  transition: transform 220ms ease, border-color 220ms ease;
}
.page-about .partner-card:hover {
  transform: translateY(-2px);
  border-color: var(--cy-40);
}
.page-about .partner-num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}
.page-about .partner-name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}
.page-about .partner-desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.74;
  color: var(--muted);
}

.page-about .honor-band {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: 26px 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  background:
    linear-gradient(135deg, rgba(12, 38, 32, 0.9), rgba(59, 42, 107, 0.55));
}
.page-about .honor-title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .honor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .honor-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--text);
}
.page-about .honor-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--lime);
}
.page-about .honor-cta p {
  margin: 0 0 16px;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--muted);
}
.page-about .honor-cta .btn {
  margin-right: 10px;
  margin-bottom: 10px;
}

/* ---------- 收尾 ---------- */
.page-about .about-closing {
  padding: 60px 0 84px;
  border-top: 1px solid var(--about-line-soft);
  background:
    radial-gradient(70% 120% at 100% 100%, rgba(35, 224, 206, 0.14), transparent 60%),
    linear-gradient(180deg, rgba(5, 19, 15, 0.4), rgba(12, 38, 32, 0.7));
}
.page-about .closing-inner {
  max-width: 72ch;
}
.page-about .closing-line {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 4.6vw, 1.9rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}
.page-about .closing-sub {
  margin: 0 0 26px;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--muted);
}
.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 72px 0 80px;
  }
  .page-about .hero-facts {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .page-about .team-roles {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .partner-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .venue-points {
    gap: 14px;
  }
  .page-about .honor-band {
    padding: 32px 30px;
  }
}

@media (min-width: 960px) {
  .page-about .section {
    padding: 96px 0;
  }
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 56px;
  }
  .page-about .hero-facts {
    grid-template-columns: 1fr;
  }
  .page-about .fact {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
  }
  .page-about .timeline {
    padding-left: 46px;
  }
  .page-about .timeline::before {
    left: 9px;
  }
  .page-about .timeline-node {
    left: -46px;
    width: 20px;
    height: 20px;
    top: 2px;
  }
  .page-about .timeline-item {
    padding-bottom: 58px;
  }
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .team-figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
  .page-about .audit-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .venues-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 52px;
  }
  .page-about .venues-figure {
    align-self: center;
  }
  .page-about .honor-band {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
  }
  .page-about .about-closing {
    padding: 84px 0 110px;
  }
}

@media (min-width: 1200px) {
  .page-about .timeline-name {
    font-size: 1.3rem;
  }
  .page-about .role-num {
    font-size: 2.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .partner-card,
  .page-about .fold,
  .page-about .fold--step > summary::before {
    transition: none;
  }
  .page-about .role-card:hover,
  .page-about .partner-card:hover {
    transform: none;
  }
}
</style>