.page-about {
  display: block;
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

.page-about > .crumb {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 22px var(--pad-x) 0;
}

.page-about .display-title {
  margin: 0 0 18px;
  font-size: clamp(32px, 7.2vw, 76px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: .01em;
}

.page-about .title-lg {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.18;
}

.page-about .title-md {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.2vw, 26px);
  font-weight: 700;
  line-height: 1.3;
}

.page-about .lede {
  max-width: 720px;
  margin: 0 0 22px;
  color: var(--mist);
  font-size: 17px;
  line-height: 1.8;
}

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

/* ============ 首屏 ============ */

.page-about .about-hero {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(44px, 7.5vw, 96px) var(--pad-x) clamp(30px, 4vw, 56px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}

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

.page-about .about-hero__note {
  margin: 0;
  color: var(--gold);
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 88px;
  }

  .page-about .about-hero__note {
    justify-self: end;
    padding-top: 8px;
  }
}

/* ============ 起点 ============ */

.page-about .section {
  padding: clamp(52px, 7.5vw, 104px) var(--pad-x);
}

.page-about .section > * {
  max-width: var(--shell-max);
  margin-inline: auto;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-origin__body {
  max-width: 660px;
}

.page-about .about-origin__body .prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-origin__more {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: var(--line) solid var(--gold);
  color: var(--steel);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-origin__more a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .45);
}

.page-about .about-origin__more a:hover,
.page-about .about-origin__more a:focus-visible {
  border-bottom-color: var(--neon);
}

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

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 660px) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

/* ============ 团队 ============ */

.page-about .about-team__head {
  max-width: 780px;
}

.page-about .team-bars {
  list-style: none;
  margin: clamp(26px, 3.5vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .team-bar {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 16px;
  padding: clamp(18px, 2.4vw, 28px) clamp(18px, 2.4vw, 28px) clamp(22px, 3vw, 34px);
  border: var(--line) solid var(--panel);
  background: var(--deep);
  box-shadow: 6px 6px 0 var(--shadow);
  transition: transform var(--t-base), box-shadow var(--t-base);
}

.page-about .team-bar:hover {
  transform: translateY(-4px);
  box-shadow: 6px 10px 0 var(--shadow);
}

.page-about .team-bar__name {
  grid-column: 1;
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
  letter-spacing: .02em;
}

.page-about .team-bar__num {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .team-bar__desc {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .team-bar::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 4px;
  background: var(--neon);
}

.page-about .team-bar--collect::after { width: 100%; }
.page-about .team-bar--verify::after { width: 82%; }
.page-about .team-bar--edit::after { width: 64%; }

/* ============ 归档规模 ============ */

.page-about .about-scale {
  padding-block: clamp(48px, 6.5vw, 88px);
  background: linear-gradient(180deg, var(--grad-a) 0%, var(--grad-b) 100%);
  border-top: var(--line) solid var(--gold);
  border-bottom: var(--line) solid var(--gold);
}

.page-about .about-scale .data-band__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-inline: var(--pad-x);
}

.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3vw, 36px);
  border: var(--line) solid rgba(201, 162, 39, .55);
  background: rgba(201, 162, 39, .35);
}

.page-about .scale-cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 30px);
  background: rgba(7, 18, 15, .82);
}

.page-about .scale-cell .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 58px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--neon);
}

.page-about .scale-cell .stat-label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-scale__note {
  max-width: 900px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-scale__media {
  max-width: var(--shell-max);
  margin: clamp(28px, 4vw, 52px) auto 0;
  padding-inline: var(--pad-x);
}

@media (min-width: 860px) {
  .page-about .scale-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============ 时间线 ============ */

.page-about .about-path__head {
  max-width: 720px;
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--gold);
  opacity: .5;
}

.page-about .timeline__item {
  position: relative;
  padding-left: 40px;
}

.page-about .tl-dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--neon);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 2px rgba(200, 255, 61, .28);
  transition: transform var(--t-base), box-shadow var(--t-base);
}

.page-about .timeline__item:hover .tl-dot,
.page-about .timeline__item:focus-within .tl-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 5px rgba(200, 255, 61, .22);
}

.page-about .tl-stage {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .timeline__item:hover .tl-stage,
.page-about .timeline__item:focus-within .tl-stage {
  color: var(--neon);
}

.page-about .tl-text {
  max-width: 680px;
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .tl-summary {
  max-width: 680px;
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .tl-toggle {
  display: inline-block;
}

.page-about .tl-panel {
  max-width: 680px;
  margin-top: 12px;
  padding: 14px 16px;
  border-left: var(--line) solid var(--neon);
  background: var(--panel);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .tl-panel p {
  margin: 0;
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .tl-summary {
    max-height: 0;
    margin-bottom: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--t-base), opacity var(--t-base), margin-bottom var(--t-base);
  }

  .page-about .timeline__item:hover .tl-summary,
  .page-about .timeline__item:focus-within .tl-summary {
    max-height: 120px;
    margin-bottom: 14px;
    opacity: 1;
  }
}

/* ============ 合作与资质 ============ */

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-partners__body {
  max-width: 720px;
}

.page-about .cert-list {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .cert-card {
  padding: clamp(18px, 2.4vw, 26px);
  border: var(--line) solid var(--panel);
  background: var(--deep);
  box-shadow: 6px 6px 0 var(--shadow);
  transition: transform var(--t-base), box-shadow var(--t-base);
}

.page-about .cert-card:hover {
  transform: translateY(-4px);
  box-shadow: 6px 10px 0 var(--shadow);
}

.page-about .cert-card .chip {
  margin-bottom: 12px;
}

.page-about .cert-card__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .cert-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

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

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
  }

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

  .page-about .cert-card:first-child {
    grid-column: 1 / -1;
  }
}

/* ============ 服务区域与响应 ============ */

.page-about .about-service {
  padding: clamp(46px, 6vw, 84px) var(--pad-x);
  background: linear-gradient(180deg, var(--deep) 0%, var(--ink) 100%);
  border-top: var(--line) solid var(--gold);
}

.page-about .about-service__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
}

.page-about .about-service__inner .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-service__text {
  max-width: 820px;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

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

/* ============ 图片与通用收口 ============ */

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

.page-about .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

@media (max-width: 600px) {
  .page-about .tl-text,
  .page-about .tl-summary {
    font-size: 15px;
  }

  .page-about .about-scale__note {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-bar,
  .page-about .cert-card,
  .page-about .tl-dot,
  .page-about .tl-summary {
    transition: none;
  }

  .page-about .team-bar:hover,
  .page-about .cert-card:hover {
    transform: none;
  }
}
<<<END>>>