.page-about {
  --about-hair: rgba(201, 211, 230, 0.18);
  --about-hair-soft: rgba(201, 211, 230, 0.09);
  --about-aurora-glow: rgba(53, 224, 200, 0.14);
  background: var(--ink);
  color: var(--silver);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: 0;
  background:
    radial-gradient(120% 90% at 82% 6%, rgba(75, 46, 131, 0.42) 0%, transparent 62%),
    radial-gradient(90% 70% at 8% 92%, rgba(53, 224, 200, 0.12) 0%, transparent 60%),
    var(--ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-hair-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-hair-soft) 1px, transparent 1px);
  background-size: 92px 92px;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(75% 70% at 50% 30%, #000 0%, transparent 100%);
  mask-image: radial-gradient(75% 70% at 50% 30%, #000 0%, transparent 100%);
}

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

.page-about .about-hero .breadcrumb {
  color: var(--muted);
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-hero .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--aurora);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(40px, 8vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-hero__stats > div {
  background: rgba(19, 27, 58, 0.72);
  padding: 16px 18px;
}

.page-about .about-hero__stats dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 8px;
}

.page-about .about-hero__stats dd {
  margin: 0;
  color: var(--aurora);
  font-size: 20px;
}

.page-about .about-hero__figure {
  margin: clamp(40px, 6vw, 80px) 0 0;
  padding: 0 var(--rail);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
  border: 1px solid var(--about-hair);
  object-fit: cover;
}

@media (max-width: 767px) {
  .page-about .about-hero__figure img {
    aspect-ratio: 4 / 3;
  }
}

/* ---------- 规模数字 ---------- */

.page-about .about-figures {
  background: var(--ink-2);
  border-top: 1px solid var(--about-hair-soft);
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-figures__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 28px;
  background: var(--about-hair-soft);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px 22px;
  background: var(--ink-2);
  border-top: 2px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-figure:hover {
  border-top-color: var(--aurora);
  background: rgba(53, 224, 200, 0.05);
}

.page-about .about-figure__num {
  font-size: clamp(34px, 5vw, 48px);
  line-height: 1;
  font-weight: 300;
  color: var(--paper);
}

.page-about .about-figure__unit {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ember);
}

.page-about .about-figure__label {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 起点故事 ---------- */

.page-about .about-story__grid {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-story__lede h2 {
  margin: 14px 0 26px;
  color: var(--text);
}

.page-about .about-story__lede p {
  margin: 0 0 20px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 团队 ---------- */

.page-about .about-roles {
  background:
    radial-gradient(90% 70% at 90% 0%, rgba(75, 46, 131, 0.36) 0%, transparent 60%),
    var(--ink);
}

.page-about .about-roles__head {
  max-width: 46em;
  margin-top: 16px;
  margin-bottom: clamp(32px, 5vw, 52px);
}

.page-about .about-roles__head h2 {
  margin: 0 0 16px;
  color: var(--paper);
}

.page-about .about-roles__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-roles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-role {
  --cut: 16px;
  padding: 26px 24px 28px;
  background: rgba(19, 27, 58, 0.85);
  border: 1px solid var(--about-hair);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 224, 200, 0.45);
}

.page-about .about-role__idx {
  display: block;
  font-size: 30px;
  line-height: 1;
  color: var(--nebula);
  filter: brightness(2.1);
  margin-bottom: 16px;
}

.page-about .about-role__title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-roles__figure {
  margin: 8px 0 0;
}

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

.page-about .about-roles__figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 能力时间线 ---------- */

.page-about .about-tl {
  background: var(--ink-2);
}

.page-about .about-tl__wrap {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-tl__rail h2 {
  margin: 16px 0 14px;
  color: var(--paper);
}

.page-about .about-tl__note {
  margin: 0 0 26px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-tl__nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-tl__nav a {
  display: inline-block;
  padding: 7px 13px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--silver);
  text-decoration: none;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-tl__nav a:hover,
.page-about .about-tl__nav a:focus-visible {
  color: var(--ink);
  background: var(--aurora);
  border-color: var(--aurora);
}

.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(20px, 3vw, 34px);
  border-left: 1px solid var(--about-hair);
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(34px, 5vw, 54px);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(clamp(20px, 3vw, 34px) * -1 - 5px);
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--aurora);
  box-shadow: 0 0 0 5px var(--about-aurora-glow);
}

.page-about .about-node:target::before {
  background: var(--ember);
  box-shadow: 0 0 0 6px rgba(255, 138, 61, 0.18);
}

.page-about .about-node__meta {
  margin: 0 0 12px;
}

.page-about .about-node__title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-node__text {
  margin: 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  margin-top: 24px;
}

.page-about .about-eco__chart h2 {
  margin: 0 0 18px;
  color: var(--text);
}

.page-about .about-eco__lede {
  margin: 0 0 22px;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-eco__svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-about .eco-line {
  stroke: rgba(107, 117, 144, 0.5);
  stroke-width: 1.4;
  stroke-dasharray: 5 6;
  transition: stroke 0.3s var(--ease), stroke-width 0.3s var(--ease);
}

.page-about .eco-ring {
  fill: var(--mist);
  stroke: rgba(26, 31, 51, 0.22);
  stroke-width: 1.4;
  transition: stroke 0.3s var(--ease), fill 0.3s var(--ease);
}

.page-about .eco-num {
  font-family: var(--font-mono);
  font-size: 24px;
  fill: var(--text);
  text-anchor: middle;
  font-variant-numeric: tabular-nums;
}

.page-about .eco-name {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--muted);
  text-anchor: middle;
}

.page-about .eco-group {
  cursor: default;
  outline: none;
}

.page-about .eco-group:hover .eco-line,
.page-about .eco-group:focus-visible .eco-line {
  stroke: var(--aurora);
  stroke-width: 2.4;
}

.page-about .eco-group:hover .eco-ring,
.page-about .eco-group:focus-visible .eco-ring {
  stroke: var(--aurora);
  fill: #ffffff;
}

.page-about .eco-core circle {
  fill: url(#ecoCore);
}

.page-about .eco-core__name {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  fill: #ffffff;
  text-anchor: middle;
}

.page-about .eco-core__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  fill: rgba(255, 255, 255, 0.78);
  text-anchor: middle;
}

.page-about .about-eco__figure {
  margin: 0;
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-eco__figure figcaption {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 数据流程 ---------- */

.page-about .about-flow {
  background:
    linear-gradient(180deg, rgba(11, 16, 38, 0) 0%, rgba(19, 27, 58, 0.85) 100%),
    var(--ink);
}

.page-about .about-flow__head {
  max-width: 44em;
  margin: 16px 0 clamp(30px, 5vw, 48px);
}

.page-about .about-flow__head h2 {
  margin: 0 0 16px;
  color: var(--paper);
}

.page-about .about-flow__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-step {
  position: relative;
  padding-top: 22px;
  border-top: 1px solid var(--about-hair);
  transition: border-color 0.3s var(--ease);
}

.page-about .about-step:hover {
  border-top-color: var(--ember);
}

.page-about .about-step__idx {
  display: block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--aurora);
  margin-bottom: 12px;
}

.page-about .about-step__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 500;
  color: var(--paper);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 里程碑与去向 ---------- */

.page-about .about-marks h2 {
  margin: 16px 0 clamp(28px, 4vw, 44px);
  color: var(--text);
}

.page-about .about-marks__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-mark {
  padding: 26px 24px;
  background: rgba(255, 255, 255, 0.55);
  border-left: 3px solid var(--nebula);
  border-radius: 0 2px 2px 0;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-mark:hover {
  border-left-color: var(--ember);
  background: #ffffff;
}

.page-about .about-mark__title {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
}

.page-about .about-mark__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-next {
  margin-top: clamp(34px, 5vw, 54px);
  padding-top: 30px;
  border-top: 1px solid rgba(26, 31, 51, 0.14);
}

.page-about .about-next__text {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__links .btn--ghost {
  color: var(--text);
  border-color: rgba(26, 31, 51, 0.28);
}

.page-about .about-next__links .btn--ghost:hover {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-figures__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .about-flow__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 26px 22px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.95fr);
    align-items: end;
    gap: clamp(36px, 6vw, 84px);
  }

  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 0.28fr) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
  }

  .page-about .about-figures__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .about-flow__list {
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-tl__wrap {
    grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-about .about-tl__rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .about-tl__nav {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
  }

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

  .page-about .about-roles__figure {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-figure,
  .page-about .about-mark,
  .page-about .about-step {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
  }
}
<<<END>>>