.page-about {
  --about-hair: rgba(46, 75, 99, 0.72);
  --about-hair-soft: rgba(46, 75, 99, 0.42);
  --about-panel: rgba(5, 13, 24, 0.62);
  color: var(--mist-100);
  background-color: var(--abyss-900);
  overflow-x: clip;
}

.page-about section[id] {
  scroll-margin-top: 84px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 5vw, 56px) clamp(32px, 6vw, 78px);
  border-bottom: 1px solid var(--steel-line-500);
  background-image:
    linear-gradient(to right, rgba(46, 75, 99, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 75, 99, 0.2) 1px, transparent 1px);
  background-size: 88px 88px;
  background-position: center top;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero__media {
  position: relative;
  min-width: 0;
}

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

.page-about .about-hero__stack .media-frame--tall {
  aspect-ratio: 3 / 4;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__caption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-top: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted-300);
}

.page-about .about-hero__caption .mono-note {
  color: var(--warm-gold);
}

.page-about .about-hero__vlabel {
  display: none;
}

.page-about .about-hero__body {
  min-width: 0;
}

.page-about .about-hero__body .eyebrow {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  color: var(--fluoro-cyan);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 5.4vw, 3.7rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--mist-100);
}

.page-about .about-hero__lede {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  max-width: 62ch;
  font-size: clamp(0.96rem, 1.05vw, 1.06rem);
  line-height: 1.9;
  color: var(--muted-300);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 1px;
  background: var(--about-hair);
}

.page-about .about-facts > div {
  background: var(--deep-sea-800);
  padding: 12px 14px 14px;
}

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted-300);
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--mist-100);
}

.page-about .about-facts dd span {
  margin-left: 2px;
  font-size: 0.5em;
  font-weight: 500;
  color: var(--muted-300);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--steel-line-500);
  background: var(--about-panel);
  color: var(--muted-300);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--fluoro-cyan);
  color: var(--mist-100);
  background: rgba(66, 245, 212, 0.08);
}

.page-about .about-jump .mono-note {
  font-size: 11px;
  color: var(--warm-gold);
}

/* ---------- 章节标题 ---------- */
.page-about .ch-head {
  display: grid;
  gap: 10px;
  padding-bottom: clamp(16px, 2.4vw, 22px);
  margin-bottom: clamp(22px, 3.4vw, 34px);
  border-bottom: 1px solid var(--steel-line-500);
}

.page-about .ch-head__index {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--warm-gold);
}

.page-about .ch-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.3vw, 2.4rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--mist-100);
}

.page-about .ch-head__lede {
  margin: 0;
  max-width: 66ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--muted-300);
}

/* ---------- 空间 ---------- */
.page-about .about-space {
  padding-block: clamp(38px, 6vw, 80px);
  background-color: var(--deep-sea-800);
  border-bottom: 1px solid var(--steel-line-500);
}

.page-about .space-grid {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .space-card {
  min-width: 0;
}

.page-about .space-card__inner {
  padding: clamp(16px, 2.4vw, 24px);
  height: 100%;
}

.page-about .space-card .tag {
  display: inline-block;
  margin-bottom: 10px;
}

.page-about .space-card .card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.08rem, 1.7vw, 1.3rem);
  line-height: 1.4;
  color: var(--mist-100);
}

.page-about .space-card .card__text {
  margin: 0 0 10px;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--muted-300);
}

.page-about .space-card .card__text:last-child {
  margin-bottom: 0;
}

.page-about .space-members {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--warm-gold);
  background: rgba(16, 43, 68, 0.62);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--muted-300);
}

.page-about .space-members strong {
  color: var(--mist-100);
  font-weight: 600;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-block: clamp(38px, 6vw, 80px);
  border-bottom: 1px solid var(--steel-line-500);
}

.page-about .timeline-layout {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
  min-width: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom, var(--warm-gold) 0%, var(--steel-line-500) 22%, var(--steel-line-500) 74%, var(--fluoro-cyan) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 28px);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--warm-gold);
  background: var(--abyss-900);
  transform: rotate(45deg);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  border-color: var(--fluoro-cyan);
  box-shadow: 0 0 0 4px rgba(66, 245, 212, 0.12);
}

.page-about .timeline__item--now::before {
  border-color: var(--fluoro-cyan);
  box-shadow: 0 0 0 4px rgba(66, 245, 212, 0.14);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--warm-gold);
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.4;
  color: var(--mist-100);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 60ch;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--muted-300);
}

.page-about .timeline__note {
  margin: 9px 0 0;
  padding-left: 11px;
  border-left: 1px solid var(--steel-line-500);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted-300);
  opacity: 0.66;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), opacity 0.18s var(--ease);
}

.page-about .timeline__item:hover .timeline__note {
  color: var(--fluoro-cyan);
  border-color: var(--fluoro-cyan);
  opacity: 1;
}

.page-about .timeline-figure {
  margin: 0;
  min-width: 0;
}

.page-about .timeline-figure .media-frame {
  aspect-ratio: 16 / 10;
}

.page-about .timeline-figure figcaption {
  padding-top: 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted-300);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(38px, 6vw, 80px);
  background-color: var(--deep-sea-800);
  border-bottom: 1px solid var(--steel-line-500);
}

.page-about .team-layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .team-aside {
  display: grid;
  gap: 14px;
  min-width: 0;
}

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

.page-about .team-figure .media-frame {
  aspect-ratio: 3 / 2;
}

.page-about .team-root {
  display: grid;
  gap: 4px;
  padding: 16px 18px 18px;
  border: 1px solid var(--steel-line-500);
  background: var(--about-panel);
}

.page-about .team-root__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 5vw, 3.3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--warm-gold);
}

.page-about .team-root__label {
  font-size: 0.84rem;
  letter-spacing: 0.14em;
  color: var(--mist-100);
}

.page-about .team-root__text {
  margin: 6px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted-300);
}

.page-about .team-branches {
  min-width: 0;
}

.page-about .node {
  position: relative;
  border: 1px solid var(--steel-line-500);
  background: var(--blueprint-700);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .node + .node {
  margin-top: 10px;
}

.page-about .node:hover,
.page-about .node[open] {
  border-color: var(--fluoro-cyan);
}

.page-about .node__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .node__head::-webkit-details-marker {
  display: none;
}

.page-about .node__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fluoro-cyan);
}

.page-about .node__name {
  flex: 1 1 auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--mist-100);
}

.page-about .node__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--warm-gold);
}

.page-about .node__head::after {
  content: "+";
  margin-left: 2px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--muted-300);
  transition: color 0.18s var(--ease);
}

.page-about .node[open] .node__head::after {
  content: "−";
  color: var(--fluoro-cyan);
}

.page-about .node__desc {
  margin: 0 14px;
  padding: 12px 0 14px;
  border-top: 1px solid rgba(46, 75, 99, 0.7);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--muted-300);
}

.page-about .team-result {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--steel-line-500);
  font-size: 0.9rem;
  color: var(--muted-300);
}

.page-about .team-result strong {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--fluoro-cyan);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding-block: clamp(38px, 6vw, 80px);
  border-bottom: 1px solid var(--steel-line-500);
}

.page-about .partner-layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: start;
}

.page-about .partner-cats,
.page-about .partner-audit {
  min-width: 0;
}

.page-about .partner-lead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  margin: 0;
  font-size: 0.94rem;
  color: var(--muted-300);
}

.page-about .partner-lead__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 5vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--neon-orange);
}

.page-about .cat-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--steel-line-500);
}

.page-about .cat-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 2px;
  padding: 12px 2px;
  border-bottom: 1px solid var(--about-hair-soft);
  transition: background-color 0.18s var(--ease);
}

.page-about .cat-list li:hover {
  background: rgba(66, 245, 212, 0.05);
}

.page-about .cat-list__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--warm-gold);
}

.page-about .cat-list__name {
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--mist-100);
}

.page-about .cat-list__text {
  grid-column: 2;
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--muted-300);
}

.page-about .partner-audit {
  padding: clamp(16px, 2.6vw, 24px);
  border: 1px solid var(--steel-line-500);
  background: var(--blueprint-700);
}

.page-about .partner-audit h3 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.04rem, 1.8vw, 1.22rem);
  line-height: 1.4;
  color: var(--mist-100);
}

.page-about .audit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .audit-list li {
  padding-left: 12px;
  border-left: 2px solid var(--fluoro-cyan);
}

.page-about .audit-list__k {
  display: block;
  margin-bottom: 4px;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--mist-100);
}

.page-about .audit-list p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--muted-300);
}

.page-about .partner-foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(46, 75, 99, 0.8);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--muted-300);
}

/* ---------- 服务方法 ---------- */
.page-about .about-method {
  padding-block: clamp(38px, 6vw, 80px);
  background-color: var(--deep-sea-800);
  border-bottom: 1px solid var(--steel-line-500);
}

.page-about .method-steps {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(226px, 80%);
  gap: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .step {
  scroll-snap-align: start;
  padding: 16px 16px 18px;
  border: 1px solid var(--steel-line-500);
  border-left: none;
  background: var(--about-panel);
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .step:first-child {
  border-left: 1px solid var(--steel-line-500);
}

.page-about .step:hover {
  border-color: var(--fluoro-cyan);
  background: rgba(66, 245, 212, 0.06);
}

.page-about .step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon-orange);
}

.page-about .step__title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--mist-100);
}

.page-about .step__text {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--muted-300);
}

.page-about .method-note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--muted-300);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(38px, 6vw, 80px);
}

.page-about .about-cta__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-cta__body .eyebrow {
  margin: 0;
  color: var(--fluoro-cyan);
}

.page-about .about-cta h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2.05rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--mist-100);
}

.page-about .about-cta__body p {
  margin: 0 0 20px;
  max-width: 46ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted-300);
}

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--steel-line-500);
}

.page-about .about-cta__links a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  column-gap: 12px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--steel-line-500);
  color: var(--mist-100);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.page-about .about-cta__links a::after {
  content: "→";
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  justify-self: end;
  color: var(--steel-line-500);
  transition: color 0.18s var(--ease);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  border-color: var(--fluoro-cyan);
  padding-left: 10px;
}

.page-about .about-cta__links a:hover::after,
.page-about .about-cta__links a:focus-visible::after {
  color: var(--fluoro-cyan);
}

.page-about .cta-link__t {
  grid-column: 1;
  font-size: 0.98rem;
  font-weight: 600;
}

.page-about .cta-link__d {
  grid-column: 1;
  margin-top: 3px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted-300);
}

.page-about .about-address {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--steel-line-500);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--muted-300);
}

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

@media (min-width: 860px) {
  .page-about .space-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .space-card--lead {
    grid-column: span 7;
    grid-row: span 2;
  }

  .page-about .space-card--side {
    grid-column: span 5;
  }

  .page-about .method-steps {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    overflow-x: visible;
    padding-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-about .about-hero__vlabel {
    display: block;
    position: absolute;
    top: 4px;
    right: -20px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.28em;
    color: var(--steel-line-500);
  }

  .page-about .timeline-layout {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

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

  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: clamp(28px, 3.4vw, 44px);
  }

  .page-about .node::before {
    content: "";
    position: absolute;
    left: -15px;
    top: 22px;
    width: 14px;
    height: 1px;
    background: var(--steel-line-500);
  }

  .page-about .partner-layout {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(30px, 4vw, 52px);
  }

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump a,
  .page-about .timeline__item::before,
  .page-about .timeline__note,
  .page-about .node,
  .page-about .step,
  .page-about .about-cta__links a,
  .page-about .about-cta__links a::after {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>
</main>