.page-about {
  background: var(--bg);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 20px 0 8px;
  background:
    radial-gradient(85% 110% at 84% -12%, rgba(41, 243, 195, 0.13) 0%, rgba(6, 16, 29, 0) 62%),
    var(--bg);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(42, 66, 88, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 66, 88, 0.55) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(125% 92% at 72% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(125% 92% at 72% 0%, #000 0%, transparent 74%);
  pointer-events: none;
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: 20px 0 40px;
}

.page-about .about-hero-copy .eyebrow {
  margin: 0 0 14px;
  color: var(--mint);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-about .about-hero-copy h1 {
  margin: 0 0 18px;
  font-family: var(--sans);
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-hero-copy .lead {
  margin: 0;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px;
  background: var(--bg);
}

.page-about .fact-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.page-about .fact-unit {
  font-size: 13px;
  margin-left: 1px;
}

.page-about .fact-label {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.4;
}

.page-about .about-hero-media {
  margin: 0;
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
}

.page-about .about-hero-media figcaption {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 9px 12px;
  border-top: 1px solid var(--line);
}

/* ---------- 路线图主体 ---------- */
.page-about .about-body {
  padding: 8px 0 64px;
}

.page-about .about-route-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .rail-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .rail-list::-webkit-scrollbar {
  display: none;
}

.page-about .rail-list li {
  flex: 0 0 auto;
}

.page-about .rail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  background: transparent;
  border: 1px solid var(--line);
  white-space: nowrap;
  transition:
    color var(--fast) var(--ease),
    border-color var(--fast) var(--ease),
    background-color var(--fast) var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--ink);
  border-color: var(--mint);
  background: var(--card);
}

.page-about .rail-num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mint);
}

/* ---------- 阶段卡 ---------- */
.page-about .stage {
  position: relative;
  margin: 0 0 20px;
  padding: 24px 20px 26px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-about .stage::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 26px;
  height: 26px;
  background: linear-gradient(
    225deg,
    var(--bg) 44%,
    var(--line) 44%,
    var(--line) 56%,
    var(--panel) 56%
  );
  pointer-events: none;
}

.page-about .stage::after {
  content: "";
  position: absolute;
  left: -1px;
  top: 22px;
  width: 3px;
  height: 46px;
  background: var(--mint);
}

.page-about .stage-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 16px;
}

.page-about .stage-coord {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mint);
  padding: 2px 6px;
  border: 1px solid var(--mint-deep);
  line-height: 1.4;
}

.page-about .stage h2 {
  margin: 0;
  font-size: clamp(19px, 3.6vw, 27px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--ink);
}

.page-about .stage p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--muted);
}

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

.page-about .stage h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--ink);
}

/* ---------- 三条阅读价值 ---------- */
.page-about .value-list {
  margin-top: 4px;
}

.page-about .value-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-about .value-item:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .value-key {
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
  letter-spacing: 0.02em;
  padding-top: 2px;
}

.page-about .value-body p {
  margin: 0;
}

/* ---------- 发展路线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 22px 26px;
  border-left: 1px solid var(--line);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--bg);
  border: 2px solid var(--mint);
  transform: rotate(45deg);
}

.page-about .tl-year {
  display: block;
  margin-bottom: 4px;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .tl-item .tl-title {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .tl-item p {
  margin: 0;
  font-size: 15px;
}

/* ---------- 团队条形索引 ---------- */
.page-about .team-bars {
  list-style: none;
  margin: 18px 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 54px;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
}

.page-about .bar-label {
  color: var(--ink);
}

.page-about .bar-track {
  position: relative;
  display: block;
  height: 8px;
  background: var(--card);
  border: 1px solid var(--line);
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--mint-deep), var(--mint));
  transition: filter var(--fast) var(--ease);
}

.page-about .team-bar:hover .bar-fill {
  filter: brightness(1.18);
}

.page-about .team-bar:nth-child(1) .bar-fill { width: 37.5%; }
.page-about .team-bar:nth-child(2) .bar-fill { width: 28.1%; }
.page-about .team-bar:nth-child(3) .bar-fill { width: 25%; }
.page-about .team-bar:nth-child(4) .bar-fill { width: 9.4%; }

.page-about .bar-num {
  font-size: 12.5px;
  color: var(--muted);
  text-align: right;
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 20px 0 0;
  background: var(--card);
  border: 1px solid var(--line);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-figure figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 合作生态折叠 ---------- */
.page-about .accordion {
  margin: 18px 0 20px;
  border-top: 1px solid var(--line);
}

.page-about .acc-item {
  border-bottom: 1px solid var(--line);
}

.page-about .acc-head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .acc-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 13px 2px;
  background: transparent;
  border: 0;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: color var(--fast) var(--ease);
}

.page-about .acc-num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .acc-trigger:hover .acc-title,
.page-about .acc-trigger:focus-visible .acc-title {
  color: var(--mint);
}

.page-about .acc-panel {
  padding: 0 2px 15px 26px;
}

.page-about .acc-panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 规模网格 ---------- */
.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 18px 0 20px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .scale-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 15px 13px;
  background: var(--panel);
}

.page-about .scale-num {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--mint);
  letter-spacing: -0.01em;
}

.page-about .scale-label {
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--muted);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: 26px;
  padding: 24px 20px 26px;
  background: linear-gradient(160deg, var(--card), var(--panel));
  border: 1px solid var(--line);
  border-top: 2px solid var(--mint-deep);
}

.page-about .about-next .eyebrow {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mint);
}

.page-about .about-next h2 {
  margin: 0 0 16px;
  font-size: clamp(19px, 3.4vw, 25px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .next-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  background: rgba(6, 16, 29, 0.55);
  color: var(--ink);
  text-decoration: none;
  transition:
    border-color var(--fast) var(--ease),
    background-color var(--fast) var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--mint);
  background: rgba(41, 243, 195, 0.07);
}

.page-about .next-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .next-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 28px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: end;
    gap: 48px;
    padding: 18px 0 56px;
  }

  .page-about .about-hero-media {
    align-self: stretch;
  }

  .page-about .about-hero-media img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 320px;
  }

  .page-about .stage {
    padding: 30px 30px 32px;
  }

  .page-about .team-bar {
    grid-template-columns: 96px minmax(0, 1fr) 60px;
  }

  .page-about .next-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-route-grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .rail {
    position: sticky;
    top: 96px;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .rail-list li {
    flex: 0 0 auto;
  }

  .page-about .rail-link {
    display: flex;
    width: 100%;
    padding: 11px 12px;
    border: 0;
    border-left: 2px solid var(--line);
    white-space: normal;
  }

  .page-about .rail-link:hover,
  .page-about .rail-link:focus-visible {
    border-left-color: var(--mint);
    background: var(--card);
  }

  .page-about .value-item {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 16px;
  }

  .page-about .next-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-link,
  .page-about .next-link,
  .page-about .acc-trigger,
  .page-about .bar-fill {
    transition: none;
  }
}
<<<END>>>