.page-about {
  --about-rail: 208px;
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(20px, 4vw, 40px);
  color: var(--paper);
  background:
    radial-gradient(120% 90% at 84% 8%, rgba(46, 140, 134, .20), transparent 62%),
    radial-gradient(90% 70% at 8% 0%, rgba(200, 154, 75, .22), transparent 58%),
    var(--ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(243, 233, 215, .07) 0 1px, transparent 1px 36px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  padding-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero .breadcrumb-link,
.page-about .about-hero .breadcrumb-current {
  color: var(--text-on-dark-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-about .about-hero .breadcrumb-link:hover {
  color: var(--gold-bright);
}

.page-about .about-hero__kicker {
  margin: clamp(18px, 3vw, 30px) 0 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 60px);
  line-height: 1.14;
  letter-spacing: -.01em;
  max-width: 20em;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--text-on-dark);
}

.page-about .about-hero__stats {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stat {
  padding: 14px 16px;
  border-left: 2px solid var(--gold);
  background: rgba(22, 41, 92, .55);
}

.page-about .about-hero__stat dt {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--text-on-dark-dim);
}

.page-about .about-hero__stat dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 26px);
  color: var(--paper-light);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  line-height: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(140px, 26vw, 300px);
  object-fit: cover;
  object-position: center 60%;
  filter: saturate(.9);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(28px, 5vw, 60px);
  padding-bottom: clamp(44px, 7vw, 84px);
}

.page-about .about-rail {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-rail__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .about-anchors {
  display: flex;
  flex-direction: row;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-anchors .anchor-link {
  flex: 0 0 auto;
  display: inline-flex;
  gap: 8px;
  align-items: baseline;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-78);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease;
}

.page-about .about-anchors .anchor-link .mono {
  font-size: 11px;
  color: var(--gold);
}

.page-about .about-anchors .anchor-link:hover {
  border-color: var(--gold);
  color: var(--ink);
}

.page-about .about-anchors .anchor-link[aria-current="true"] {
  border-color: var(--clay);
  background: var(--clay);
  color: var(--paper-light);
}

.page-about .about-anchors .anchor-link[aria-current="true"] .mono {
  color: rgba(251, 246, 236, .8);
}

.page-about .about-rail__card {
  padding: 16px 18px;
  border: 1px solid var(--line-line);
  border-radius: 14px 40px 14px 14px;
  background: var(--paper-light);
  box-shadow: var(--shadow-panel);
}

.page-about .about-rail__card-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
}

.page-about .about-rail__card-desc {
  margin: 8px 0 14px;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 章节通用 ---------- */
.page-about .about-flow {
  display: grid;
  gap: clamp(36px, 6vw, 76px);
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 92px;
  min-width: 0;
}

.page-about .about-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-head__no {
  margin: 0;
  padding-top: 8px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--clay);
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.3;
  letter-spacing: -.005em;
}

.page-about .about-section__text {
  margin: 16px 0 0;
  max-width: 38em;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-78);
}

/* ---------- 01 业务范围 ---------- */
.page-about .about-cards {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-card {
  padding: 18px 20px;
  background: var(--paper-light);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  box-shadow: 0 12px 26px -24px rgba(10, 19, 48, .8);
  transition: border-color .2s ease, transform .24s ease;
}

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

.page-about .about-card .index-card__no {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--teal);
}

.page-about .about-card .index-card__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
}

.page-about .about-card .index-card__body {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 02 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 20px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-team__blocks {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-about .about-role {
  padding: 16px 20px;
  border: 1px solid var(--line-soft);
  background: var(--paper-light);
}

.page-about .about-role--a {
  border-radius: 26px 54px 20px 34px;
  background: linear-gradient(135deg, rgba(46, 140, 134, .12), var(--paper-light) 62%);
}

.page-about .about-role--b {
  border-radius: 52px 22px 44px 22px;
  margin-left: 12px;
  background: linear-gradient(135deg, rgba(200, 154, 75, .16), var(--paper-light) 62%);
}

.page-about .about-role--c {
  border-radius: 22px 30px 58px 26px;
  margin-left: 24px;
  background: linear-gradient(135deg, rgba(196, 85, 47, .13), var(--paper-light) 62%);
}

.page-about .about-role__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .about-role__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
}

.page-about .about-role__desc {
  margin: 8px 0 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-78);
}

.page-about .about-team__figure {
  margin: 0;
  align-self: start;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 18px;
  border: 1px solid var(--line-line);
  object-fit: cover;
}

.page-about .about-team__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--slate);
}

/* ---------- 03 流程 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-step {
  padding: 14px 16px;
  background: var(--paper-light);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--gold);
  border-radius: 0 0 12px 12px;
  transition: border-color .2s ease;
}

.page-about .about-step[open] {
  border-top-color: var(--clay);
  background: #fffdf8;
}

.page-about .about-step summary {
  display: flex;
  gap: 10px;
  align-items: baseline;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
}

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

.page-about .about-step__no {
  font-size: 11px;
  color: var(--gold);
}

.page-about .about-step[open] .about-step__no {
  color: var(--clay);
}

.page-about .about-step__body {
  margin: 10px 0 0;
  padding-left: 22px;
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--slate);
}

/* ---------- 04 更新节奏 ---------- */
.page-about .about-table {
  margin-top: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: var(--paper-light);
}

.page-about .about-table__caption {
  padding: 12px 14px 8px;
  text-align: left;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .about-table .data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 13.5px;
}

.page-about .about-table .data-table th,
.page-about .about-table .data-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.7;
}

.page-about .about-table .data-table thead th {
  background: var(--ink-mid);
  color: var(--paper-light);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  font-weight: 500;
}

.page-about .about-table .data-table tbody th {
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .about-table .data-table tbody td {
  color: var(--ink-78);
}

.page-about .about-table .data-table tbody tr:last-child th,
.page-about .about-table .data-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 05 发展阶段 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0 0 0 62px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(200, 154, 75, .18));
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -45px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(196, 85, 47, .16);
}

.page-about .about-node--now::before {
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(46, 140, 134, .16);
}

.page-about .about-node__stamp {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-about .about-node--now .about-node__stamp {
  color: var(--teal);
}

.page-about .about-node__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.45;
}

.page-about .about-node__desc {
  margin: 8px 0 0;
  max-width: 36em;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-78);
}

.page-about .about-stages__figure {
  margin: 6px 0 0;
  line-height: 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line-line);
}

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

/* ---------- 06 质量 ---------- */
.page-about .about-section--quality {
  padding: clamp(20px, 3vw, 32px);
  background: var(--paper-light);
  border: 1px solid var(--line-line);
  border-radius: 18px;
  box-shadow: var(--shadow-panel);
}

.page-about .about-section--quality .about-head {
  border-top-color: var(--line-line);
}

.page-about .about-figures {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-figure {
  padding: 14px 16px;
  border-left: 3px solid var(--teal);
  background: rgba(46, 140, 134, .06);
}

.page-about .about-figure:nth-child(2) {
  border-left-color: var(--gold);
  background: rgba(200, 154, 75, .10);
}

.page-about .about-figure:nth-child(3) {
  border-left-color: var(--clay);
  background: rgba(196, 85, 47, .07);
}

.page-about .about-figure__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .about-figure__value {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.1;
  color: var(--ink);
}

.page-about .about-figure__note {
  margin: 8px 0 0;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-bars {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-bars__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
  font-weight: 500;
}

.page-about .about-bar {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
}

.page-about .about-bar__label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-78);
}

.page-about .about-bar__label .mono {
  color: var(--ink);
}

.page-about .about-bar__track {
  position: relative;
  height: 24px;
  border-radius: 3px;
  background: rgba(14, 27, 61, .07);
  outline-offset: 3px;
  cursor: default;
}

.page-about .about-bar__track:focus-visible {
  outline: 2px solid var(--gold-bright);
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: 3px;
}

.page-about .about-bar__fill--a {
  background: linear-gradient(90deg, var(--ink-mid), var(--teal));
}

.page-about .about-bar__fill--b {
  background: linear-gradient(90deg, var(--ink-mid), var(--gold));
}

.page-about .about-bar__fill--c {
  background: linear-gradient(90deg, var(--ink-mid), var(--clay));
}

.page-about .about-bar__tip {
  position: absolute;
  left: 10px;
  bottom: calc(100% + 8px);
  padding: 6px 10px;
  font-size: 11px;
  letter-spacing: .02em;
  color: var(--paper-light);
  background: var(--ink);
  border-radius: 4px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .18s ease, transform .18s ease;
  pointer-events: none;
  white-space: normal;
  max-width: 260px;
  z-index: 2;
}

.page-about .about-bar__track:hover .about-bar__tip,
.page-about .about-bar__track:focus-visible .about-bar__tip {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(22px, 4vw, 36px);
  color: var(--paper);
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(200, 154, 75, .22), transparent 58%),
    var(--ink);
  border-radius: 20px 60px 20px 20px;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.35;
  color: var(--paper-light);
}

.page-about .about-cta__desc {
  margin: 12px 0 0;
  max-width: 40em;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-on-dark);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .about-cta__actions .btn--solid {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.page-about .about-cta__actions .btn--solid:hover {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
}

.page-about .about-cta__actions .btn--ghost {
  border-color: rgba(243, 233, 215, .38);
  color: var(--paper-light);
}

.page-about .about-cta__actions .btn--ghost:hover {
  border-color: var(--gold-bright);
  color: var(--gold-bright);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-cards > :nth-child(2n) {
    margin-top: 26px;
  }

  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 760px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-step:nth-child(2) {
    margin-top: 18px;
  }

  .page-about .about-step:nth-child(4) {
    margin-top: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 20px;
  }

  .page-about .about-anchors {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-anchors .anchor-link {
    border: 0;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    padding: 9px 10px;
    font-size: 13.5px;
  }

  .page-about .about-anchors .anchor-link[aria-current="true"] {
    border-left-color: var(--clay);
    background: rgba(196, 85, 47, .08);
    color: var(--ink);
  }

  .page-about .about-anchors .anchor-link[aria-current="true"] .mono {
    color: var(--clay);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 26px;
  }

  .page-about .about-role--b {
    margin-left: 20px;
  }

  .page-about .about-role--c {
    margin-left: 40px;
  }

  .page-about .about-timeline {
    padding-left: 72px;
  }

  .page-about .about-timeline::before {
    left: 26px;
  }

  .page-about .about-node::before {
    left: -50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-bar__tip,
  .page-about .about-anchors .anchor-link {
    transition: none;
  }
}
<<<END>>>