.page-about {
  background: var(--ink-900);
  color: var(--cream);
  overflow-x: clip;
}

.page-about .container {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 20px;
}

.page-about .section-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.36;
  letter-spacing: 0.01em;
  margin: 10px 0 14px;
}

.page-about .eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0;
}

.page-about .media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--r-card);
  border: 1px solid var(--hair-soft);
  background: var(--ink-800);
}

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

.page-about .media-caption {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding: 10px 14px;
  border-top: 1px solid var(--hair-soft);
}

/* 面包屑与首屏 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  padding-top: 22px;
}

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

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

.page-about .breadcrumb-sep {
  color: var(--hair);
}

.page-about .about-hero {
  position: relative;
  padding: 0 0 46px;
  background:
    radial-gradient(78% 58% at 88% -12%, rgba(199, 162, 74, 0.20), transparent 62%),
    radial-gradient(62% 52% at -6% 108%, rgba(121, 179, 160, 0.14), transparent 66%),
    var(--ink-900);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 30px;
}

.page-about .about-hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(29px, 6.4vw, 52px);
  line-height: 1.26;
  letter-spacing: 0.005em;
  margin: 14px 0 16px;
  text-wrap: balance;
}

.page-about .about-hero .lead {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.8;
  color: var(--cream);
  opacity: 0.88;
  max-width: 34em;
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-stamp {
  position: relative;
  padding: 22px 22px 20px;
  border: 1px solid var(--hair);
  border-radius: var(--r-card);
  background: linear-gradient(160deg, rgba(16, 43, 64, 0.94), rgba(8, 26, 41, 0.94));
  box-shadow: var(--shadow-soft);
}

.page-about .about-stamp::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px dashed rgba(199, 162, 74, 0.28);
  border-radius: calc(var(--r-card) - 6px);
  pointer-events: none;
}

.page-about .about-stamp__rot {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--gold);
  transform: rotate(-1.8deg);
  transform-origin: left center;
  margin: 0 0 14px;
}

.page-about .about-stamp__num {
  font-family: var(--mono);
  font-size: clamp(46px, 13vw, 68px);
  line-height: 1;
  font-weight: 600;
  color: var(--gold);
  margin: 0;
  letter-spacing: -0.02em;
}

.page-about .about-stamp__cap {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--cream);
  opacity: 0.85;
  margin: 10px 0 0;
}

.page-about .about-stamp__line {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--celadon);
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-hero__steps {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 32px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-hero__steps li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--cream);
  opacity: 0.9;
}

.page-about .about-hero__steps .label-mono {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amber);
  letter-spacing: 0.1em;
}

/* 沿革时间轴 */
.page-about .about-timeline {
  padding: 54px 0 62px;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800) 70%, var(--ink-900));
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 22px;
}

.page-about .about-timeline__rail {
  border-left: 2px solid var(--gold);
  padding-left: 14px;
}

.page-about .about-rail__note {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  color: var(--cream);
  margin: 12px 0 14px;
}

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

.page-about .about-rail__list li {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--mist);
  border: 1px solid var(--hair-soft);
  border-radius: var(--r-pill);
  padding: 4px 9px;
}

.page-about .about-timeline__intro {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.82;
  color: var(--cream);
  opacity: 0.82;
  margin: 0 0 24px;
}

.page-about .about-timeline__figure {
  margin-bottom: 30px;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--hair);
}

.page-about .timeline-item {
  position: relative;
  padding-bottom: 20px;
}

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

.page-about .timeline-mark {
  position: absolute;
  left: -27px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(199, 162, 74, 0.15);
}

.page-about .timeline-year {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin: 0 0 8px;
}

.page-about .timeline-item .card {
  background: rgba(16, 43, 64, 0.86);
  border: 1px solid var(--hair-soft);
  border-radius: var(--r-card);
  padding: 18px 18px 20px;
  box-shadow: var(--shadow-soft);
}

.page-about .card-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-900);
  background: var(--celadon);
  border-radius: var(--r-pill);
  padding: 3px 10px;
  margin: 0 0 10px;
}

.page-about .timeline-item .card-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--cream);
  margin: 0 0 8px;
}

.page-about .timeline-item .card-text {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
  margin: 0;
}

/* 编号体系 */
.page-about .about-numbering {
  padding: 56px 0 60px;
  background: var(--paper);
  color: var(--brown);
}

.page-about .about-numbering .eyebrow {
  color: #8A6A1E;
}

.page-about .about-numbering .section-title {
  color: var(--brown);
}

.page-about .about-numbering__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-numbering__lead {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.82;
  color: #3A2C22;
  margin: 0 0 24px;
}

.page-about .about-numbering__parts {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: 0 0 24px;
  padding: 0;
}

.page-about .about-numbering__parts li {
  border-top: 2px solid var(--gold);
  padding-top: 12px;
}

.page-about .about-part__idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-numbering__parts h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  margin: 6px 0 6px;
}

.page-about .about-numbering__parts p {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.76;
  color: #4A382C;
  margin: 0;
}

.page-about .about-fold {
  border: 1px solid var(--paper-edge);
  border-radius: var(--r-card);
  background: rgba(250, 244, 232, 0.72);
}

.page-about .about-fold summary {
  cursor: pointer;
  padding: 14px 16px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--brown);
  list-style: none;
}

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

.page-about .about-fold summary::before {
  content: "+";
  font-family: var(--mono);
  color: var(--amber);
  margin-right: 10px;
}

.page-about .about-fold[open] summary::before {
  content: "−";
}

.page-about .about-fold[open] summary {
  border-bottom: 1px solid var(--paper-edge);
}

.page-about .about-fold__body {
  padding: 16px;
}

.page-about .about-fold__body p {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.78;
  color: #3A2C22;
  margin: 0 0 12px;
}

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

.page-about .about-fold__key {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--mono);
  font-size: clamp(24px, 7vw, 34px);
  color: var(--ink-700);
  letter-spacing: 0.02em;
  margin: 0 0 14px;
}

.page-about .about-fold__key span:nth-child(2) {
  color: var(--amber);
}

.page-about .about-fold__key span:nth-child(3) {
  color: #2E6D5B;
}

.page-about .about-fold__key i {
  font-style: normal;
  color: var(--paper-edge);
}

.page-about .about-numbering__figure {
  border-color: var(--paper-edge);
  background: var(--paper-edge);
}

.page-about .about-numbering__figure .media-caption {
  background: rgba(250, 244, 232, 0.9);
  color: #5A4636;
  border-top-color: var(--paper-edge);
}

/* 团队 */
.page-about .about-team {
  padding: 56px 0 64px;
  background: var(--ink-800);
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-team .lead {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 40em;
  margin: 0;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 24px 0 26px;
}

.page-about .index-tab {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--cream);
  background: transparent;
  border: 1px solid var(--hair);
  border-radius: var(--r-pill);
  padding: 8px 15px;
  cursor: pointer;
}

.page-about .index-tab[aria-pressed="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: #241408;
  font-weight: 600;
}

.page-about .filter-count {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  margin-left: 4px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-team__card {
  position: relative;
  background: var(--panel-glass);
  border: 1px solid var(--hair-soft);
  border-radius: var(--r-card);
  padding: 22px 20px 20px;
  box-shadow: var(--shadow-soft);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 42px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-team__tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin: 6px 0 10px;
}

.page-about .about-team__card h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--cream);
  margin: 0 0 10px;
}

.page-about .about-team__card p {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
  margin: 0;
}

.page-about .about-team__meta {
  margin-top: 16px !important;
  padding-top: 12px;
  border-top: 1px solid var(--hair-soft);
  color: var(--celadon) !important;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-team__card.is-filtered {
  display: none;
}

/* 服务范围 */
.page-about .about-scope {
  padding: 56px 0 62px;
  background: var(--paper);
  color: var(--brown);
}

.page-about .about-scope .eyebrow {
  color: #8A6A1E;
}

.page-about .about-scope .section-title {
  color: var(--brown);
}

.page-about .about-scope__lead {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.82;
  color: #3A2C22;
  max-width: 40em;
  margin: 0 0 26px;
}

.page-about .about-scope__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-scope__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-scope__list li {
  border-left: 1px solid var(--paper-edge);
  padding-left: 14px;
}

.page-about .about-scope__list .label-mono {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: #8A6A1E;
}

.page-about .about-scope__list p {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.78;
  color: #3A2C22;
  margin: 6px 0 0;
}

.page-about .about-scope__dark {
  background: var(--ink-800);
  color: var(--cream);
  border-radius: var(--r-card);
  padding: 24px 20px 26px;
  border: 1px solid var(--hair);
  box-shadow: var(--shadow-lift);
}

.page-about .about-scope__badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-900);
  background: var(--celadon);
  border-radius: var(--r-pill);
  padding: 4px 11px;
  margin: 0 0 14px;
}

.page-about .about-scope__dark h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.45;
  margin: 0 0 12px;
  color: var(--cream);
}

.page-about .about-scope__dark p {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  margin: 0 0 12px;
}

.page-about .about-scope__note {
  border-top: 1px solid var(--hair-soft);
  padding-top: 12px;
  margin-bottom: 0 !important;
  color: var(--celadon) !important;
  font-size: 13px !important;
}

/* 统计与出口 */
.page-about .about-stats {
  padding: 56px 0 70px;
  background:
    radial-gradient(70% 50% at 12% 0%, rgba(199, 162, 74, 0.16), transparent 60%),
    var(--ink-900);
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-stats__lead {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 38em;
  margin: 0;
}

.page-about .about-stats__grid {
  display: grid;
  gap: 18px;
  margin: 30px 0 0;
}

.page-about .about-stats__grid > div {
  border-top: 2px solid var(--gold);
  padding-top: 12px;
}

.page-about .stat-cap {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
  order: 2;
}

.page-about .stat-num {
  font-family: var(--mono);
  font-size: clamp(28px, 7.6vw, 40px);
  line-height: 1.1;
  font-weight: 600;
  color: var(--gold);
  margin: 8px 0 4px;
  letter-spacing: -0.01em;
}

.page-about .stat-sub {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--celadon);
}

.page-about .about-stats__figure {
  margin-top: 34px;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

@media (min-width: 720px) {
  .page-about .container {
    padding: 0 32px;
  }

  .page-about .about-hero__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-hero__steps li {
    border-left: 1px solid var(--hair-soft);
    padding-left: 14px;
  }

  .page-about .about-numbering__parts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

  .page-about .about-scope__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-bottom: 58px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
    gap: 44px;
    margin-top: 40px;
  }

  .page-about .about-hero .lead {
    font-size: 16px;
  }

  .page-about .about-stamp {
    padding: 26px 24px 22px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 96px;
    align-self: start;
    border-left: 2px solid var(--gold);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .about-rail__list li {
    border: none;
    padding: 0;
    font-size: 11px;
    color: var(--mist);
  }

  .page-about .timeline {
    padding-left: 28px;
  }

  .page-about .timeline-mark {
    left: -33px;
  }

  .page-about .timeline-item {
    padding-bottom: 24px;
  }

  .page-about .timeline-item:nth-child(odd) .card {
    max-width: 94%;
  }

  .page-about .timeline-item:nth-child(even) .card {
    max-width: 82%;
    margin-left: 12%;
  }

  .page-about .about-numbering__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: 28px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 56px;
  }

  .page-about .about-scope__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

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

  .page-about .about-scope__dark {
    padding: 28px 26px 30px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: 1fr 1.15fr 1fr 0.85fr;
    gap: 26px;
  }

  .page-about .about-stats__figure {
    margin-top: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stamp__rot {
    transform: none;
  }
}
<<<END>>>