.page-about {
  --about-line-soft: rgba(244, 241, 232, 0.14);
  --about-gold: var(--gold);
  counter-reset: layer;
  background: var(--indigo-900);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--text-faint);
}

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

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--paper);
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 26px 0 48px;
  background:
    radial-gradient(92% 78% at 86% 0%, rgba(20, 80, 200, 0.5) 0%, rgba(11, 21, 51, 0) 62%),
    linear-gradient(176deg, var(--indigo-850) 0%, var(--indigo-900) 58%, var(--indigo-900) 100%);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(42, 53, 80, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 53, 80, 0.55) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
}

.page-about .layer-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .layer-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.page-about .hero-grid {
  display: grid;
  gap: 32px;
  margin-top: 26px;
  align-items: center;
}

.page-about .hero-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 52px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .hero-lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-about .hero-media {
  margin: 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: 1px solid rgba(45, 125, 255, 0.38);
  box-shadow: 0 22px 56px rgba(0, 0, 0, 0.42);
}

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

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .hero-stats > div {
  background: var(--indigo-850);
  padding: 18px 16px 20px;
}

.page-about .hero-stats dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

.page-about .hero-stats dd {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .hero-stats dd span {
  margin-left: 4px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--text-dim);
}

.page-about .hero-stats > div:first-child dd {
  color: var(--lime);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  text-decoration: none;
  border: 1px solid var(--line-dark);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--paper);
  border-color: var(--blue-bright);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-layer {
  position: relative;
  padding: 52px 0;
  counter-increment: layer;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-layer--bone {
  background: var(--bone);
  color: var(--ink-soft);
  border-top-color: var(--line-light);
}

.page-about .about-layer--bone::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(89, 96, 110, 0.11) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(89, 96, 110, 0.11) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-about .about-layer--bone > .shell {
  position: relative;
  z-index: 1;
}

.page-about .layer-head {
  display: grid;
  gap: 14px;
  margin-bottom: 30px;
}

.page-about .layer-num {
  display: block;
  width: 66px;
  padding-top: 10px;
  border-top: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .layer-num::before {
  content: counter(layer, decimal-leading-zero);
}

.page-about .about-layer--bone .layer-num {
  color: var(--clay);
}

.page-about .layer-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 38px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-layer--bone .layer-title {
  color: var(--ink);
}

.page-about .layer-lede {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-layer--bone .layer-lede {
  color: var(--ink-soft);
}

/* ---------- 看台起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 30px;
}

.page-about .origin-copy p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .origin-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .origin-list li {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 18px 22px;
  background: var(--paper);
}

.page-about .origin-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-about .origin-list strong {
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .origin-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 日常运营 ---------- */
.page-about .ops-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-dark);
}

.page-about .ops-item {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ops-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--blue-bright);
}

.page-about .ops-title {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 23px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .ops-item p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .ops-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

/* ---------- 质量保障 ---------- */
.page-about .quality-grid {
  display: grid;
  gap: 30px;
}

.page-about .quality-copy p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .flow {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .flow li {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 18px 22px;
  background: var(--paper);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--blue);
}

.page-about .flow h3 {
  margin: 0;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .flow p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .quality-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 36px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .quality-stats > div {
  padding: 18px 14px 20px;
  background: var(--paper);
}

.page-about .qs-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 3.6vw, 27px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.page-about .qs-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.62;
  color: var(--rock);
}

/* ---------- 里程碑 ---------- */
.page-about .milestone-figure {
  margin: 0 0 34px;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  border: 1px solid var(--line-dark);
}

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

.page-about .milestones {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .milestones::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(242, 184, 75, 0.35) 55%, rgba(42, 53, 80, 0.9) 100%);
}

.page-about .milestones > li {
  position: relative;
  margin-bottom: 2px;
}

.page-about .milestones > li::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 13px;
  height: 13px;
  border: 1px solid var(--gold);
  background: var(--indigo-900);
  transform: rotate(45deg);
}

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

.page-about .milestone summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .milestone summary::marker {
  content: "";
}

.page-about .milestone summary:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 4px;
}

.page-about .ms-season {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .ms-title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .ms-toggle {
  flex: 0 0 auto;
  min-width: 54px;
  padding: 5px 9px;
  border: 1px solid var(--line-dark);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .ms-toggle::after {
  content: "展开";
}

.page-about .milestone[open] .ms-toggle::after {
  content: "收起";
}

.page-about .milestone summary:hover .ms-toggle {
  color: var(--lime);
  border-color: rgba(182, 255, 59, 0.5);
}

.page-about .milestone-body {
  max-width: 68ch;
  padding: 0 0 20px;
}

.page-about .milestone-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 30px;
}

.page-about .team-copy p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .team-visual {
  margin-top: 24px;
  padding: 20px 18px 18px;
  background: var(--paper);
  border: 1px solid var(--line-light);
}

.page-about .team-dots {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
}

.page-about .team-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-soft);
}

.page-about .team-legend .dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border: 1px solid rgba(11, 21, 51, 0.16);
}

.page-about .dot--blue {
  background: var(--blue-bright);
}

.page-about .dot--lime {
  background: var(--lime);
}

.page-about .dot--gold {
  background: var(--gold);
}

.page-about .team-figure {
  margin: 0;
  aspect-ratio: 10 / 7;
  overflow: hidden;
  border: 1px solid var(--line-light);
}

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

/* ---------- 服务范围 ---------- */
.page-about .reach-stats {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .reach-stats li {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 24px 20px 26px;
  background: var(--indigo-850);
}

.page-about .reach-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .reach-stats li:nth-child(2) .reach-num {
  color: var(--gold);
}

.page-about .reach-stats li:nth-child(3) .reach-num {
  color: var(--blue-bright);
}

.page-about .reach-label {
  font-size: 13px;
  line-height: 1.68;
  color: var(--text-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 26px;
}

.page-about .partner-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding-top: 20px;
  border-top: 2px solid var(--blue);
}

.page-about .partner-card--clay {
  border-top-color: var(--clay);
}

.page-about .partner-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 6vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .partner-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .partner-card p,
.page-about .partner-copy p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .partner-copy {
  padding-top: 4px;
  border-top: 1px solid var(--line-light);
}

.page-about .partner-copy p {
  padding-top: 18px;
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  padding: 52px 0 60px;
  background: linear-gradient(168deg, var(--blue) 0%, #0F3D9E 100%);
  border-top: 1px solid rgba(45, 125, 255, 0.55);
}

.page-about .about-cta .layer-kicker {
  color: var(--lime);
}

.page-about .cta-inner {
  display: grid;
  gap: 26px;
}

.page-about .cta-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 36px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .cta-lede {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 241, 232, 0.88);
}

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

.page-about .cta-links .btn {
  min-height: 44px;
  border: 1px solid rgba(251, 252, 254, 0.48);
  background: rgba(11, 21, 51, 0.3);
  color: var(--paper);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .cta-links .btn:hover,
.page-about .cta-links .btn:focus-visible {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--blue);
}

.page-about .cta-links .btn:first-child {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--blue);
}

.page-about .cta-links .btn:first-child:hover,
.page-about .cta-links .btn:first-child:focus-visible {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--indigo-900);
}

/* ---------- 回到顶部 ---------- */
.page-about .about-footlink {
  padding: 18px 0 22px;
  background: var(--indigo-900);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-footlink a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  text-decoration: none;
}

.page-about .about-footlink a:hover,
.page-about .about-footlink a:focus-visible {
  color: var(--lime);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .layer-head {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 28px;
    margin-bottom: 44px;
  }

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

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 34px 0 60px;
  }

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

  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 54px;
  }

  .page-about .ops-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 52px;
  }

  .page-about .ops-item:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 40px;
  }

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

@media (min-width: 960px) {
  .page-about .origin-grid,
  .page-about .quality-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-cta {
    padding: 72px 0 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .cta-links .btn,
  .page-about .ms-toggle {
    transition: none;
  }
}
<<<END>>>