.page-about {
  --about-surface: #fffdf9;
  --about-hairline: rgba(6, 59, 52, 0.14);
  background: var(--paper);
  color: var(--carbon);
  overflow-wrap: break-word;
}

.page-about .breadcrumbs {
  margin: 0 0 clamp(12px, 2.5vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .about-hero__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 28px);
}

@media (min-width: 920px) {
  .page-about .about-hero__split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: stretch;
  }
}

.page-about .about-hero__manifesto {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 16px;
  min-height: 400px;
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-hero__manifesto > * {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  filter: saturate(0.85) contrast(1.1);
}

.page-about .about-hero__manifesto::after {
  content: "";
  position: absolute;
  left: -20%;
  right: -20%;
  bottom: -32%;
  z-index: 1;
  height: 62%;
  pointer-events: none;
  background: radial-gradient(58% 100% at 50% 100%, rgba(255, 90, 31, 0.5), transparent 72%);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(244, 240, 232, 0.86);
}

.page-about .about-hero__manifesto .btn {
  align-self: flex-start;
  margin-top: 4px;
}

.page-about .about-hero__index {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.page-about .index-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--carbon);
  color: var(--paper);
  text-decoration: none;
  box-shadow: var(--shadow-float);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .index-card:hover,
.page-about .index-card:focus-visible {
  transform: translateX(6px);
  background: var(--ink);
}

.page-about .index-card__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .index-card__body {
  display: block;
  min-width: 0;
}

.page-about .index-card__title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .index-card__desc {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .index-card__arrow {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--signal);
}

.page-about .index-card--signal {
  background: var(--signal);
  color: var(--carbon);
}

.page-about .index-card--signal:hover,
.page-about .index-card--signal:focus-visible {
  background: var(--signal-deep);
  color: var(--paper);
}

.page-about .index-card--signal .index-card__no,
.page-about .index-card--signal .index-card__arrow {
  color: var(--carbon);
}

.page-about .index-card--signal:hover .index-card__no,
.page-about .index-card--signal:hover .index-card__arrow,
.page-about .index-card--signal:focus-visible .index-card__no,
.page-about .index-card--signal:focus-visible .index-card__arrow {
  color: var(--paper);
}

.page-about .index-card--signal .index-card__desc {
  color: rgba(18, 20, 23, 0.72);
}

.page-about .index-card--signal:hover .index-card__desc,
.page-about .index-card--signal:focus-visible .index-card__desc {
  color: rgba(244, 240, 232, 0.8);
}

@media (min-width: 920px) {
  .page-about .index-card:nth-child(2) {
    margin-left: clamp(16px, 3vw, 34px);
  }
  .page-about .index-card:nth-child(3) {
    margin-left: clamp(32px, 6vw, 68px);
  }
}

/* ---------- 方法 ---------- */
.page-about .about-method__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
}

@media (min-width: 900px) {
  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-about .about-method h2,
.page-about .about-team h2,
.page-about .about-timeline__head h2,
.page-about .about-partners__head h2,
.page-about .about-reach h2,
.page-about .about-cta h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.015em;
}

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

.page-about .method-steps {
  list-style: none;
  counter-reset: method;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .method-steps li {
  position: relative;
  padding: 16px 18px 16px 58px;
  border-radius: var(--radius-md);
  background: var(--carbon);
  color: rgba(244, 240, 232, 0.84);
  font-size: 14.5px;
  line-height: 1.72;
}

.page-about .method-steps li::before {
  counter-increment: method;
  content: "0" counter(method);
  position: absolute;
  left: 18px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .method-steps strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .method-metrics {
  margin-top: 22px;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hairline);
  border-left: 3px solid var(--signal);
  background: var(--about-surface);
}

.page-about .method-metrics__title {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .method-metrics__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-about .method-metrics__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: #40544d;
}

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

.page-about .about-method__figure .media-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--carbon);
  color: var(--paper);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 50px);
  align-items: center;
}

@media (min-width: 860px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }
}

.page-about .about-team__chart {
  position: relative;
  width: min(100%, 330px);
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.page-about .about-ring {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .about-team__center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 4px;
  text-align: center;
  pointer-events: none;
}

.page-about .about-team__center strong {
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-team__center span {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-team .prose {
  margin: 0;
  color: rgba(244, 240, 232, 0.82);
}

.page-about .team-legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-legend li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .team-legend__dot {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--muted);
}

.page-about .team-legend__dot--signal {
  background: var(--signal);
}
.page-about .team-legend__dot--cyan {
  background: var(--cyan);
}
.page-about .team-legend__dot--paper {
  background: var(--paper);
}
.page-about .team-legend__dot--muted {
  background: var(--muted);
}

.page-about .team-legend__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-legend__name span {
  display: block;
  margin-top: 3px;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .team-legend__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__band {
  display: block;
  width: 100%;
  height: clamp(120px, 22vw, 210px);
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-timeline__head {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-timeline__head .prose {
  margin: 0;
  max-width: 66ch;
}

.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

@media (min-width: 780px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }
}

.page-about .about-timeline .accordion-item {
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--carbon);
  color: var(--paper);
}

.page-about .about-timeline .accordion-trigger {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 18px 18px 16px;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
  transition: background 0.22s var(--ease);
}

.page-about .about-timeline .accordion-trigger:hover,
.page-about .about-timeline .accordion-trigger:focus-visible {
  background: var(--ink);
}

.page-about .about-timeline .accordion-trigger[aria-expanded="true"] {
  background: var(--ink);
  box-shadow: inset 0 3px 0 var(--signal);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.page-about .tl-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-timeline .accordion-body {
  padding: 0 18px 18px;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(244, 240, 232, 0.8);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-partners__head .prose {
  margin: 0;
  max-width: 64ch;
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (min-width: 720px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .partner-card {
  --accent: var(--signal);
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--about-surface);
  border-top: 3px solid var(--accent);
  box-shadow: 0 16px 32px -28px rgba(6, 59, 52, 0.6);
}

.page-about .partner-card:nth-child(2) {
  --accent: var(--cyan);
}
.page-about .partner-card:nth-child(3) {
  --accent: var(--indigo);
}
.page-about .partner-card:nth-child(4) {
  --accent: var(--wine);
}

.page-about .partner-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .partner-card h3 {
  margin: 8px 0 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--carbon);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: #3d4f49;
}

/* ---------- 服务体量 ---------- */
.page-about .about-reach {
  background: var(--indigo);
  color: var(--paper);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 900px) {
  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }
}

.page-about .about-reach .prose {
  margin: 0;
  color: rgba(244, 240, 232, 0.82);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

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

.page-about .about-stats li {
  padding: 16px 14px;
  border-radius: var(--radius-sm);
  background: var(--glass);
  border: 1px solid rgba(69, 240, 224, 0.18);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(244, 240, 232, 0.78);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, var(--ink) 0%, var(--indigo) 62%, var(--wine) 100%);
  color: var(--paper);
}

@media (min-width: 900px) {
  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
  }
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 240, 232, 0.84);
}

.page-about .about-cta h2 {
  color: var(--paper);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 900px) {
  .page-about .about-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

.page-about .about-cta__actions .btn {
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .index-card,
  .page-about .about-timeline .accordion-trigger {
    transition: none;
  }
  .page-about .index-card:hover,
  .page-about .index-card:focus-visible {
    transform: none;
  }
}
<<<END>>>