.page-about {
  --about-axis: rgba(245, 166, 35, 0.38);
  --about-grid: rgba(255, 255, 255, 0.055);
  --about-hair: rgba(22, 32, 46, 0.1);
  --about-card-light: #ffffff;
  background: var(--navy);
  color: var(--on-dark);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: 20px 0 0;
}

.page-about .breadcrumbs {
  font-size: var(--fs-14);
}

.page-about .breadcrumbs a,
.page-about .breadcrumbs li {
  color: var(--gray);
}

.page-about .breadcrumbs a:hover {
  color: var(--gold);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--on-dark-strong);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 64px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--about-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-grid) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.35) 70%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.35) 70%, transparent 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 32px;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 6px 14px;
  border: 1px solid var(--about-axis);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 7vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--on-dark-strong);
}

.page-about .about-lede {
  margin: 0 0 28px;
  max-width: 58ch;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--on-dark);
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 11;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy-mid);
}

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

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-about .about-hero__stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  padding: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-about .about-stat {
  padding: 16px 18px;
  background: var(--navy);
}

.page-about .about-stat dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  font-size: var(--fs-28);
  font-weight: 900;
  line-height: 1.1;
  color: var(--on-dark-strong);
}

.page-about .about-stat dd .num {
  color: var(--gold);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-section__head {
  margin-bottom: 32px;
}

.page-about .about-index {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-about .about-section__head h2 {
  margin: 0;
  font-size: clamp(23px, 4.4vw, 38px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-section__head--dark .about-index {
  color: var(--gold);
}

.page-about .about-section__head--dark h2 {
  color: var(--on-dark-strong);
}

.page-about .about-section__sub {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 品牌起源（浅色） ---------- */
.page-about .about-origin {
  padding: 64px 0;
  background: var(--mist);
  color: var(--ink);
}

.page-about .about-origin__body {
  display: grid;
  gap: 32px;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-origin__aside {
  align-self: start;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--gold);
}

.page-about .about-origin__quote {
  margin: 0 0 20px;
  font-size: var(--fs-20);
  font-weight: 900;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-origin__list {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-origin__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: var(--fs-14);
  color: var(--ink);
  border-bottom: 1px dashed var(--about-hair);
  padding-bottom: 10px;
}

.page-about .about-origin__list .mono {
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-origin__note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 能力矩阵（深色） ---------- */
.page-about .about-capability {
  padding: 64px 0;
  background: var(--navy-mid);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-capacity-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-cap-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-cap-card:hover,
.page-about .about-cap-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--gold);
}

.page-about .about-cap-card__index {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-cap-card h3 {
  margin: 0;
  font-size: var(--fs-20);
  font-weight: 900;
  color: var(--on-dark-strong);
}

.page-about .about-cap-card p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--on-dark);
}

.page-about .about-cap-card__link {
  margin-top: auto;
  padding-top: 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease);
}

.page-about .about-cap-card__link:hover {
  border-bottom-color: var(--gold);
}

/* ---------- 版本时间轴（深色） ---------- */
.page-about .about-versions {
  padding: 64px 0;
  background: var(--navy);
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 32px 36px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 26px;
  bottom: 0;
  width: 1px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--about-axis) 0,
    var(--about-axis) 4px,
    transparent 4px,
    transparent 9px
  );
}

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__marker {
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--navy);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(245, 166, 35, 0.12);
  transition: box-shadow 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-timeline__item--current .about-timeline__marker {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px rgba(53, 240, 166, 0.16);
}

.page-about .about-timeline__item:hover .about-timeline__marker {
  box-shadow: 0 0 0 8px rgba(245, 166, 35, 0.16);
}

.page-about .about-timeline__item--current:hover .about-timeline__marker {
  box-shadow: 0 0 0 8px rgba(53, 240, 166, 0.2);
}

.page-about .about-timeline__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .about-timeline__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-timeline__item--current .about-timeline__tag {
  color: var(--lime);
}

.page-about .about-timeline__stage {
  font-size: var(--fs-12);
  color: var(--gray);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: var(--fs-20);
  font-weight: 900;
  color: var(--on-dark-strong);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--on-dark);
}

/* ---------- 数据运营（浅色） ---------- */
.page-about .about-ops {
  padding: 64px 0;
  background: var(--mist);
  color: var(--ink);
}

.page-about .about-ops__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-ops__frame {
  margin: 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: #dfe6ef;
}

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

.page-about .about-ops__frame figcaption {
  padding: 12px 16px;
  background: var(--about-card-light);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-flow {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  position: relative;
  padding-bottom: 24px;
}

.page-about .about-flow__step + .about-flow__step {
  padding-top: 24px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-flow__step + .about-flow__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 44px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-deep));
}

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

.page-about .about-flow__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gold-deep);
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: var(--fs-20);
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 团队与协作（深色） ---------- */
.page-about .about-team {
  padding: 64px 0;
  background: var(--navy-mid);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-team__text p {
  margin: 0 0 16px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--on-dark);
}

.page-about .about-team__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease);
}

.page-about .about-team__link:hover {
  border-bottom-color: var(--gold);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gray);
}

/* ---------- 服务与纠错（浅色） ---------- */
.page-about .about-trust {
  padding: 64px 0 96px;
  background: var(--mist);
  color: var(--ink);
}

.page-about .about-trust__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-trust__card {
  position: relative;
  padding: 30px 22px 26px;
  background: var(--about-card-light);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-trust__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  width: 52px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--gold), var(--violet));
}

.page-about .about-trust__card h3 {
  margin: 12px 0 12px;
  font-size: var(--fs-20);
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-trust__card p {
  margin: 0 0 12px;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--ink);
}

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

.page-about .about-trust__hint {
  font-size: var(--fs-14) !important;
  color: var(--gray) !important;
}

.page-about .about-contact-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-contact-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-hair);
}

.page-about .about-contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-about .about-contact-list__label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-about .about-contact-list__value {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-trust__card--accent {
  background: linear-gradient(160deg, #14294a 0%, #0a1730 100%);
  border-color: rgba(245, 166, 35, 0.3);
}

.page-about .about-trust__card--accent::before {
  background: linear-gradient(90deg, var(--gold), var(--lime));
}

.page-about .about-trust__card--accent h3 {
  color: var(--on-dark-strong);
}

.page-about .about-trust__card--accent p {
  color: var(--on-dark);
}

.page-about .about-trust__cta {
  margin-top: 16px;
}

/* ---------- 悬浮纠错入口 ---------- */
.page-about .about-fab {
  position: fixed;
  right: 16px;
  bottom: 20px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  background: var(--gold);
  color: #1a1204;
  font-size: var(--fs-14);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
  transition: transform 200ms var(--ease), background 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-fab__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #0a1730;
}

.page-about .about-fab:hover {
  transform: translateY(-2px);
  background: var(--gold-deep);
  color: #ffffff;
}

.page-about .about-fab:hover .about-fab__dot {
  background: #ffffff;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-capacity-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 56px 0 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-origin,
  .page-about .about-capability,
  .page-about .about-versions,
  .page-about .about-ops,
  .page-about .about-team {
    padding: 80px 0;
  }

  .page-about .about-origin__body {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
  }

  .page-about .about-ops__grid {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-ops__frame {
    position: sticky;
    top: 88px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    column-gap: 40px;
    padding: 0 0 44px 48px;
  }

  .page-about .about-timeline__item::before {
    left: 7px;
    top: 24px;
  }

  .page-about .about-timeline__marker {
    left: 0;
    top: 6px;
  }

  .page-about .about-timeline__meta {
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    margin-bottom: 0;
    padding-top: 2px;
    text-align: right;
  }

  .page-about .about-trust {
    padding: 80px 0 112px;
  }

  .page-about .about-trust__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-fab {
    right: 32px;
    bottom: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cap-card,
  .page-about .about-timeline__marker,
  .page-about .about-fab {
    transition: none;
  }

  .page-about .about-cap-card:hover,
  .page-about .about-cap-card:focus-within,
  .page-about .about-fab:hover {
    transform: none;
  }
}
<<<END>>>