.page-about {
  --about-rail-w: 216px;
  --about-col-gap: 48px;
  --about-hero-pad-top: 32px;
  background:
    radial-gradient(circle at 14% 0%, rgba(51, 221, 245, 0.10), transparent 44%),
    radial-gradient(circle at 86% 12%, rgba(200, 255, 77, 0.07), transparent 40%),
    var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: var(--about-hero-pad-top) 0 44px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 34%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime));
  opacity: 0.7;
}

.page-about .about-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}

.page-about .about-hero-copy {
  position: relative;
  padding-left: 14px;
}

.page-about .about-hero-copy::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: linear-gradient(180deg, var(--lime), var(--cyan));
}

.page-about .about-hero-copy .h1 {
  margin: 14px 0 0;
  line-height: 1.08;
  font-size: 34px;
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 56ch;
  color: var(--text-soft);
  font-size: var(--fs-17);
  line-height: 1.78;
}

.page-about .about-hero-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(11, 21, 18, 0.05) 30%, rgba(11, 21, 18, 0.78) 100%);
  pointer-events: none;
}

.page-about .about-hero-media .media-caption {
  position: relative;
  z-index: 1;
  display: block;
  padding: 10px 14px;
  margin: 0;
  font-size: var(--fs-14);
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero-stats li {
  background: var(--panel);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat-value {
  font-family: var(--font-num);
  font-size: var(--fs-28);
  font-weight: 800;
  color: var(--lime);
  letter-spacing: -0.02em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat-label {
  font-size: var(--fs-14);
  color: var(--muted);
  line-height: 1.6;
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  padding: 40px 0 56px;
}

.page-about .about-body-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-rail {
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--glass);
  padding: 16px 18px;
}

.page-about .about-rail-title {
  margin: 0 0 12px;
  font-size: var(--fs-14);
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 6px;
  color: var(--text-soft);
  text-decoration: none;
  font-size: var(--fs-14);
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail-list a:hover,
.page-about .about-rail-list a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(200, 255, 77, 0.06);
}

.page-about .about-rail-num {
  font-size: 12px;
  color: var(--cyan);
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

.page-about .about-chapters {
  display: flex;
  flex-direction: column;
  gap: 52px;
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  scroll-margin-top: 96px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.page-about .chapter-head {
  margin-bottom: 20px;
}

.page-about .chapter-head .h2 {
  margin: 12px 0 0;
  font-size: 26px;
  line-height: 1.24;
}

.page-about .about-chapter .prose p {
  color: var(--text-soft);
  line-height: 1.82;
}

.page-about .about-chapter .prose p + p {
  margin-top: 16px;
}

.page-about .chapter-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-about .chapter-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
}

.page-about .chapter-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.8) brightness(0.92);
}

.page-about .chapter-figure .media-caption {
  display: block;
  padding: 10px 14px;
  font-size: var(--fs-14);
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--line);
}

/* ---------- 注脚数据条 ---------- */

.page-about .about-note {
  position: relative;
  margin: 30px 0;
  padding: 20px 22px 20px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-note::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--cyan), var(--lime));
}

.page-about .about-note-label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-note-text {
  margin: 0;
  color: var(--text-soft);
  font-size: var(--fs-17);
  line-height: 1.78;
}

.page-about .about-note .num {
  color: var(--cyan);
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

/* ---------- 团队三块面板 ---------- */

.page-about .team-panels {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .team-panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-panel::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0.18);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.page-about .team-panel:hover {
  transform: translateY(-4px);
  border-color: var(--lime);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(200, 255, 77, 0.25);
}

.page-about .team-panel:hover::after {
  transform: scaleX(1);
}

.page-about .team-panel-num {
  display: block;
  font-family: var(--font-num);
  font-size: var(--fs-28);
  font-weight: 800;
  color: var(--lime);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.page-about .team-panel .h4 {
  margin: 12px 0 8px;
  font-size: var(--fs-20);
}

.page-about .team-panel p {
  margin: 0;
  color: var(--muted);
  font-size: var(--fs-14);
  line-height: 1.72;
}

/* ---------- 四道工序 ---------- */

.page-about .flow-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 1px solid var(--line);
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  padding: 0 0 22px 0;
  position: relative;
}

.page-about .flow-step:last-child {
  padding-bottom: 4px;
}

.page-about .flow-index {
  position: relative;
  font-family: var(--font-num);
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--cyan);
  padding-left: 16px;
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}

.page-about .flow-index::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(200, 255, 77, 0.16);
}

.page-about .flow-body .h4 {
  margin: 2px 0 8px;
  font-size: var(--fs-20);
}

.page-about .flow-body p {
  margin: 0;
  color: var(--text-soft);
  font-size: var(--fs-17);
  line-height: 1.78;
}

/* ---------- 协作 ---------- */

.page-about .partner-row {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .partner-card {
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .partner-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
}

.page-about .partner-tag {
  display: inline-block;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .partner-card .h4 {
  margin: 0 0 10px;
  font-size: var(--fs-20);
}

.page-about .partner-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: var(--fs-14);
  line-height: 1.74;
}

/* ---------- 时间线 ---------- */

.page-about .timeline-figure {
  margin: 24px 0 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .timeline-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.78) brightness(0.9);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.page-about .timeline-node {
  position: relative;
  scroll-margin-top: 96px;
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.page-about .node-dot {
  position: absolute;
  left: -6px;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 77, 0.14);
}

.page-about .timeline-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 14px;
}

.page-about .timeline-stage {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .timeline-band .score-value {
  font-family: var(--font-num);
  font-size: var(--fs-17);
  font-weight: 800;
  color: var(--lime);
  letter-spacing: -0.01em;
}

.page-about .timeline-body {
  padding: 16px 2px 0;
}

.page-about .timeline-body .h4 {
  margin: 0 0 8px;
  font-size: var(--fs-20);
}

.page-about .timeline-body p {
  margin: 0;
  color: var(--text-soft);
  font-size: var(--fs-17);
  line-height: 1.78;
}

.page-about .timeline-body p + p {
  margin-top: 12px;
}

.page-about .timeline-body .num {
  color: var(--cyan);
  font-family: var(--font-num);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.page-about .timeline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 221, 245, 0.4);
  padding-bottom: 2px;
  font-size: var(--fs-14);
}

.page-about .timeline-link a:hover,
.page-about .timeline-link a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 收束 ---------- */

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

.page-about .about-closing .num {
  color: var(--lime);
  font-family: var(--font-num);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.page-about .closing-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about {
    --about-hero-pad-top: 44px;
  }

  .page-about .about-hero-copy .h1 {
    font-size: 44px;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .team-panels {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .partner-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .chapter-head .h2 {
    font-size: 32px;
  }
}

@media (min-width: 1024px) {
  .page-about {
    --about-hero-pad-top: 58px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-hero-copy .h1 {
    font-size: 56px;
  }

  .page-about .about-hero-copy {
    padding-left: 20px;
  }

  .page-about .about-body {
    padding: 56px 0 84px;
  }

  .page-about .about-body-grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-col-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    padding: 20px 20px 22px;
  }

  .page-about .about-rail-list {
    gap: 4px;
  }

  .page-about .about-rail-list a {
    padding: 9px 8px;
  }

  .page-about .about-chapters {
    gap: 72px;
  }

  .page-about .about-chapter {
    padding-top: 34px;
  }

  .page-about .chapter-head .h2 {
    font-size: 38px;
  }

  .page-about .chapter-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 36px;
  }

  .page-about .partner-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .timeline {
    gap: 36px;
  }

  .page-about .timeline-node {
    padding-left: 28px;
  }

  .page-about .flow-step {
    grid-template-columns: 72px 1fr;
    gap: 20px;
  }
}

@media (min-width: 1280px) {
  .page-about {
    --about-rail-w: 236px;
    --about-col-gap: 64px;
  }

  .page-about .about-hero-copy .h1 {
    font-size: 64px;
  }

  .page-about .chapter-split {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 44px;
  }
}
<<<END>>>