.page-about {
  --about-line: rgba(74, 114, 99, 0.55);
  --about-line-soft: rgba(74, 114, 99, 0.3);
  --about-panel: rgba(14, 33, 26, 0.86);
  position: relative;
  background:
    radial-gradient(120% 70% at 88% 0%, rgba(183, 255, 60, 0.1), transparent 58%),
    radial-gradient(90% 60% at 0% 64%, rgba(111, 168, 255, 0.07), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, #0a1a14 46%, var(--ink-900) 100%);
  color: var(--text-hi);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: 3rem;
}

.page-about a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-about .breadcrumbs {
  margin-bottom: 1.1rem;
  font-size: 0.78rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 1.8rem 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(183, 255, 60, 0.45), transparent);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 1.8rem;
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 8.4vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0.65rem 0 1rem;
}

.page-about .about-title em {
  font-style: normal;
  color: var(--lime);
}

.page-about .about-hero-lead {
  color: var(--text-mid);
  font-size: 1rem;
  line-height: 1.88;
  max-width: 40em;
  margin: 0 0 1rem;
}

.page-about .about-hero-sub {
  color: var(--text-mid);
  font-size: 0.92rem;
  line-height: 1.8;
  border-left: 2px solid var(--about-line);
  padding-left: 0.9rem;
  margin: 0 0 1.4rem;
  max-width: 38em;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .about-hero-visual {
  position: relative;
  border-radius: var(--radius-l);
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-l);
  border: 1px solid var(--about-line);
  box-shadow: var(--shadow-2);
}

.page-about .about-hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-l);
  pointer-events: none;
  background-image:
    linear-gradient(rgba(183, 255, 60, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(183, 255, 60, 0.09) 1px, transparent 1px);
  background-size: 46px 46px;
  mix-blend-mode: screen;
}

.page-about .about-frame-note {
  position: absolute;
  left: 0.8rem;
  bottom: 0.8rem;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--lime);
  background: rgba(7, 19, 15, 0.8);
  border: 1px solid var(--about-line);
  border-radius: 999px;
  padding: 0.32rem 0.62rem;
}

.page-about .about-vertical-note {
  display: none;
}

/* ---------- 数字展板 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.page-about .about-stat {
  padding: 0.9rem 0.85rem 1rem;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, var(--about-panel), rgba(7, 19, 15, 0.6));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-within {
  transform: translateY(-3px);
  border-color: rgba(183, 255, 60, 0.55);
  box-shadow: var(--shadow-1);
}

.page-about .about-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 7vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-num-unit {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--text-mid);
  margin-left: 0.22rem;
  letter-spacing: 0;
}

.page-about .about-stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-hi);
}

.page-about .about-stat-foot {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--text-mid);
  transition: color var(--dur) var(--ease);
}

.page-about .about-stat:hover .about-stat-foot,
.page-about .about-stat:focus-within .about-stat-foot {
  color: var(--text-hi);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 2.6rem 0;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-chapter-head {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  margin-bottom: 1.1rem;
}

.page-about .chapter-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--lime);
  border: 1px solid rgba(183, 255, 60, 0.42);
  border-radius: 6px;
  padding: 0.18rem 0.42rem;
  flex: none;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 5.4vw, 2.35rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about .about-chapter-lead {
  color: var(--text-mid);
  font-size: 0.94rem;
  line-height: 1.88;
  max-width: 48em;
  margin: 0 0 1.3rem;
}

.page-about .about-split {
  display: grid;
  gap: 1.2rem;
}

.page-about .about-body p {
  color: var(--text-mid);
  font-size: 0.92rem;
  line-height: 1.92;
  margin: 0 0 1rem;
}

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

.page-about .about-aside {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(22, 51, 41, 0.88), rgba(7, 19, 15, 0.78));
  padding: 1rem 1rem 1.1rem;
  align-self: start;
}

.page-about .about-aside-title {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime);
  margin: 0 0 0.85rem;
}

.page-about .about-aside-list {
  margin: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-aside-list dt {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-hi);
}

.page-about .about-aside-list dd {
  margin: 0.25rem 0 0;
  font-size: 0.79rem;
  line-height: 1.7;
  color: var(--text-mid);
}

/* ---------- 官方矩阵 ---------- */
.page-about .matrix-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-about .matrix-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  padding: 0.9rem 0.8rem;
  border-top: 1px solid var(--about-line);
  border-radius: var(--radius-s);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .matrix-item:hover,
.page-about .matrix-item:focus-within {
  background: rgba(183, 255, 60, 0.05);
  border-color: rgba(183, 255, 60, 0.3);
}

.page-about .matrix-no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-mid);
  padding-top: 0.24rem;
  transition: color var(--dur) var(--ease);
}

.page-about .matrix-item:hover .matrix-no,
.page-about .matrix-item:focus-within .matrix-no {
  color: var(--lime);
}

.page-about .matrix-name {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-hi);
  margin: 0 0 0.32rem;
}

.page-about .matrix-desc {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.78;
  color: var(--text-mid);
}

.page-about .matrix-link {
  display: inline-block;
  margin-top: 0.45rem;
  font-size: 0.79rem;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(183, 255, 60, 0.45);
  padding-bottom: 1px;
}

.page-about .matrix-link:hover {
  color: var(--text-hi);
  border-bottom-color: var(--text-hi);
}

.page-about .about-matrix-note {
  margin: 1.1rem 0 0;
  padding: 0.9rem 1rem;
  border-left: 2px solid var(--orange);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(255, 106, 43, 0.07);
  color: var(--text-mid);
  font-size: 0.84rem;
  line-height: 1.85;
}

/* ---------- 场馆覆盖 ---------- */
.page-about .about-venue {
  display: grid;
  gap: 1.2rem;
}

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

.page-about .venue-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-m);
  border: 1px solid var(--about-line);
}

.page-about .about-figcap {
  margin-top: 0.6rem;
  font-size: 0.74rem;
  line-height: 1.65;
  color: var(--text-mid);
}

.page-about .venue-panel {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  padding: 1rem;
  background: linear-gradient(170deg, rgba(22, 51, 41, 0.72), rgba(7, 19, 15, 0.7));
}

.page-about .venue-filter-grid {
  display: grid;
  gap: 0.85rem;
}

.page-about .venue-filter {
  border-top: 1px solid var(--about-line-soft);
  padding-top: 0.7rem;
}

.page-about .venue-filter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .venue-filter-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--blue);
  margin: 0 0 0.55rem;
  font-weight: 500;
}

.page-about .venue-chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.page-about .venue-chip {
  font-size: 0.75rem;
  line-height: 1.5;
  padding: 0.3rem 0.62rem;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: rgba(22, 51, 41, 0.6);
  color: var(--text-mid);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .venue-chip:hover {
  color: var(--lime);
  border-color: rgba(183, 255, 60, 0.55);
  background: rgba(183, 255, 60, 0.07);
}

.page-about .venue-fields {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem 0.85rem;
  border-top: 1px dashed var(--about-line);
  padding-top: 0.9rem;
}

.page-about .venue-fields li {
  position: relative;
  padding-left: 0.85rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-mid);
}

.page-about .venue-fields li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--lime);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline-jump {
  list-style: none;
  margin: 0 0 1.3rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .timeline-jump a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--text-mid);
  border: 1px solid var(--about-line);
  border-radius: 999px;
  padding: 0.34rem 0.72rem;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .timeline-jump a:hover,
.page-about .timeline-jump a:focus-visible {
  color: var(--ink-900);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-timeline-wrap {
  display: grid;
  gap: 1.4rem;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.15rem;
  border-left: 1px solid var(--about-line);
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 1.6rem 1rem;
  scroll-margin-top: 6.5rem;
}

.page-about .timeline-node:last-child {
  padding-bottom: 0;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: -1.44rem;
  top: 0.34rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--lime);
  box-shadow: 0 0 0 4px rgba(183, 255, 60, 0.1);
}

.page-about .timeline-node--now::before {
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.16);
}

.page-about .timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.32rem;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .timeline-node--now .timeline-year {
  color: var(--orange);
}

.page-about .timeline-title {
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-hi);
  margin: 0.35rem 0 0.35rem;
}

.page-about .timeline-desc {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-about .timeline-tag {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--blue);
  border: 1px solid rgba(111, 168, 255, 0.42);
  border-radius: 999px;
  padding: 0.16rem 0.5rem;
}

/* ---------- 团队 ---------- */
.page-about .team-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
  align-content: start;
}

.page-about .team-points li {
  border-left: 2px solid rgba(111, 168, 255, 0.6);
  padding-left: 0.85rem;
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-about .team-points strong {
  display: inline-block;
  color: var(--text-hi);
  font-weight: 600;
  margin-bottom: 0.15rem;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: 1.6rem 1.15rem 1.7rem;
  border: 1px solid rgba(183, 255, 60, 0.34);
  border-radius: var(--radius-l);
  background: linear-gradient(132deg, rgba(22, 51, 41, 0.95), rgba(7, 19, 15, 0.9));
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(183, 255, 60, 0.07) 0 2px, transparent 2px 16px);
}

.page-about .about-cta p {
  position: relative;
  margin: 0;
  max-width: 48em;
  font-size: 0.92rem;
  line-height: 1.9;
  color: var(--text-mid);
}

.page-about .about-cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.15rem;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 900px) {
  .page-about {
    padding-bottom: 4.5rem;
  }

  .page-about .about-hero {
    padding-top: 2.8rem;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
    gap: 2.6rem;
  }

  .page-about .about-vertical-note {
    display: block;
    position: absolute;
    right: 0.7rem;
    top: 50%;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    font-size: 0.68rem;
    letter-spacing: 0.32em;
    color: var(--text-mid);
    background: rgba(7, 19, 15, 0.72);
    border: 1px solid var(--about-line);
    border-radius: 999px;
    padding: 0.85rem 0.3rem;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 2.2rem;
    gap: 0.75rem;
  }

  .page-about .about-stat {
    padding: 1.1rem 1rem 1.2rem;
  }

  .page-about .about-chapter {
    padding: 3.6rem 0;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.82fr);
    gap: 2rem;
    align-items: start;
  }

  .page-about .about-venue {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 1.8rem;
    align-items: start;
  }

  .page-about .venue-filter-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-about .venue-filter {
    border-top: 0;
    padding-top: 0;
  }

  .page-about .venue-fields {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1.2rem;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.2rem;
    align-items: start;
  }

  .page-about .matrix-item {
    padding: 1rem 1rem;
    gap: 1.1rem;
  }

  .page-about .about-cta {
    padding: 2.2rem 2rem 2.4rem;
  }
}

@media (min-width: 1200px) {
  .page-about .about-title {
    font-size: 4.2rem;
  }

  .page-about .about-hero-lead {
    font-size: 1.04rem;
  }

  .page-about .about-body p {
    font-size: 0.96rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .matrix-item,
  .page-about .venue-chip,
  .page-about .matrix-no,
  .page-about .about-stat-foot,
  .page-about .timeline-jump a {
    transition: none;
  }

  .page-about .about-stat:hover,
  .page-about .about-stat:focus-within {
    transform: none;
  }
}
<<<END>>>