.page-about {
  --about-rail: 150px;
  background: var(--night-900);
  color: var(--paper);
}

.page-about .about-crumbs {
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 1rem 0 clamp(2.5rem, 6vw, 4.25rem);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--tick) 1px, transparent 1px),
    linear-gradient(90deg, var(--tick) 1px, transparent 1px);
  background-size: 68px 68px;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

.page-about .about-hero__title {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8.5vw, 4.5rem);
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  color: rgba(244, 235, 216, 0.86);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1.25rem;
  margin: 1.9rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--line-light);
  list-style: none;
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-facts__label {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}

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

.page-about .about-hero__frame {
  padding: 10px;
  border: 1px solid var(--line-gold);
  background: var(--night-700);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.3);
}

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

.page-about .media__caption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  background: rgba(18, 49, 74, 0.62);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-index__list {
  display: flex;
  gap: 0.15rem;
  margin: 0;
  padding: 0.65rem 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid transparent;
  color: rgba(244, 235, 216, 0.82);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--line-gold);
  color: var(--gold);
}

.page-about .about-index__num {
  color: var(--gold-deep);
  font-size: 0.68rem;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(2.25rem, 5.5vw, 4rem) 0;
}

.page-about .about-section--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-section--dusk {
  background: var(--night-700);
  color: var(--paper);
}

.page-about .about-section--night {
  background: var(--night-900);
  color: var(--paper);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: inherit;
}

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

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: 2rem;
}

.page-about .about-head__lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 235, 216, 0.8);
}

.page-about .about-section--paper .about-head__lede {
  color: rgba(42, 33, 27, 0.78);
}

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

.page-about .about-prose p {
  margin: 0 0 1.1rem;
  font-size: clamp(1rem, 1.7vw, 1.05rem);
  line-height: 1.85;
  letter-spacing: 0.015em;
}

.page-about .about-quote {
  margin: 1.75rem 0 0;
  padding: 1.1rem 1.15rem 1.1rem 1.5rem;
  border-left: 3px solid var(--gold-deep);
  background: var(--paper-deep);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--ink);
}

/* ---------- 分栏与刻度栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-top: 0.65rem;
  border-top: 2px solid var(--gold-deep);
}

.page-about .about-rail--dark {
  border-top-color: var(--gold);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--gold-deep);
}

.page-about .about-rail--dark .about-rail__num {
  color: var(--gold);
}

.page-about .about-rail__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--slate);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(var(--gold), rgba(216, 169, 78, 0.08));
}

.page-about .timeline__item {
  position: relative;
  padding-left: 1.9rem;
  margin-bottom: 0.85rem;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 1rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  background: var(--night-700);
}

.page-about .tl {
  border: 1px solid rgba(159, 199, 201, 0.16);
  background: rgba(8, 23, 38, 0.5);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-about .tl:hover {
  border-color: rgba(216, 169, 78, 0.4);
}

.page-about .tl[open] {
  border-color: var(--line-gold);
  background: rgba(8, 23, 38, 0.82);
}

.page-about .tl__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--paper);
}

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

.page-about .tl__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .tl__title {
  flex: 1 1 auto;
}

.page-about .tl__plus::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold);
}

.page-about .tl[open] .tl__plus::after {
  content: "–";
}

.page-about .tl__body {
  padding: 0 1rem 1.05rem;
}

.page-about .tl__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(244, 235, 216, 0.82);
}

/* ---------- 图版 ---------- */
.page-about .about-figure {
  margin: 1.75rem 0 0;
}

.page-about .about-figure--inset {
  margin-top: 1.5rem;
}

.page-about .about-figure__frame {
  padding: 8px;
  border: 1px solid var(--line-ink);
  background: var(--paper-deep);
  box-shadow: 8px 8px 0 rgba(42, 33, 27, 0.1);
}

.page-about .about-section--dusk .about-figure__frame,
.page-about .about-section--night .about-figure__frame {
  border-color: var(--line-gold);
  background: var(--night-900);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.28);
}

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

/* ---------- 团队 ---------- */
.page-about .team {
  margin-top: 0.5rem;
}

.page-about .team__root {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--gold-deep);
  background: var(--night-900);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.page-about .team__branches {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team__card {
  position: relative;
  padding: 1.1rem 1rem 1.2rem;
  background: var(--paper-deep);
  border: 1px solid var(--line-ink);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}

.page-about .team__card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  right: -1px;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-mid) var(--ease);
}

.page-about .team__card:hover,
.page-about .team__card:focus-within {
  border-color: var(--gold-deep);
  transform: translateY(-3px);
  box-shadow: 5px 5px 0 rgba(169, 122, 37, 0.16);
}

.page-about .team__card:hover::before,
.page-about .team__card:focus-within::before {
  transform: scaleX(1);
}

.page-about .team__idx {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--gold-deep);
}

.page-about .team__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .team__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(42, 33, 27, 0.82);
}

/* ---------- 服务范围 ---------- */
.page-about .about-service {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about .about-service__text p {
  margin: 0 0 1rem;
  font-size: clamp(1rem, 1.7vw, 1.05rem);
  line-height: 1.85;
  color: rgba(244, 235, 216, 0.84);
}

.page-about .about-service__text .about-h2 {
  margin-bottom: 1.25rem;
}

.page-about .about-panel {
  padding: 1.25rem 1.15rem;
  border: 1px solid var(--line-gold);
  background: rgba(18, 49, 74, 0.55);
}

.page-about .about-panel__title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

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

.page-about .about-panel__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.35rem 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(159, 199, 201, 0.16);
}

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

.page-about .about-panel__row dt {
  font-size: 0.85rem;
  color: var(--slate);
}

.page-about .about-panel__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ice);
}

/* ---------- 质量保障 ---------- */
.page-about .qa-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .qa-list__item {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-ink);
}

.page-about .qa-list__item:last-child {
  border-bottom: 0;
}

.page-about .qa-list__key {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--gold-deep);
}

.page-about .qa-list__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .qa-list__item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(42, 33, 27, 0.82);
}

/* ---------- 咨询入口 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 235, 216, 0.84);
}

.page-about .about-cta__copy .about-h2 {
  margin-bottom: 1rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .about-cta__actions .btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

.page-about .about-cta__contact {
  padding-top: 1.15rem;
  border-top: 1px solid var(--line-light);
}

.page-about .about-cta__phone,
.page-about .about-cta__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.75rem;
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .about-cta__phone span,
.page-about .about-cta__mailtext {
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .about-cta__copy {
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line-gold);
  background: transparent;
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about .about-cta__copy:hover,
.page-about .about-cta__copy:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .about-cta__copy[data-copy-state="done"] {
  border-color: var(--ice);
  color: var(--ice);
}

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

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

  .page-about .qa-list__item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 0.2rem 1.5rem;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    padding-top: 2rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 2.75rem;
  }

  .page-about .about-split--wide {
    grid-template-columns: 110px minmax(0, 1fr);
  }

  .page-about .about-service {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.5rem 3rem;
    align-items: start;
  }

  .page-about .about-cta__copy {
    grid-row: span 2;
  }

  .page-about .about-cta__contact {
    grid-column: 2;
  }

  .page-about .about-cta__actions {
    align-self: end;
  }
}

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

  .page-about .about-figure__frame {
    padding: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team__card,
  .page-about .team__card::before,
  .page-about .tl,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .team__card:hover,
  .page-about .team__card:focus-within {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>