.page-about {
  background: var(--ink);
  color: var(--snow);
  overflow-x: hidden;
}

.page-about .wrap {
  position: relative;
  z-index: 1;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 36px) 0 clamp(40px, 6vw, 76px);
  background-image:
    radial-gradient(circle at 84% 4%, rgba(201, 162, 39, 0.18), transparent 54%),
    linear-gradient(180deg, rgba(46, 68, 130, 0.34), transparent 72%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(46, 68, 130, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 68, 130, 0.4) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.4;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 74%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 74%);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .ab-hero-main .display {
  margin: 0.28em 0 0;
  font-size: clamp(2.15rem, 6vw, 3.55rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--snow);
  max-width: 15em;
}

.page-about .ab-hero-main .lede {
  margin-top: 1.1em;
  max-width: 34em;
  color: var(--mist);
  line-height: 1.8;
}

.page-about .ab-hero-side {
  padding: clamp(20px, 3vw, 28px);
  border: var(--border) solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard-strong);
  border-radius: 0;
}

.page-about .ab-side-kicker {
  margin: 0;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.page-about .ab-version {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 7vw, 3.4rem);
  line-height: 1;
  font-weight: 700;
  color: var(--gold-soft);
}

.page-about .ab-side-text {
  margin: 14px 0 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-hero-side .btn {
  border-radius: 0;
}

/* ---------- 统计条 ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(32px, 5vw, 56px) 0 0;
  border-top: var(--border) solid var(--line);
}

.page-about .ab-stat {
  padding: 16px 12px 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .ab-stat dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .ab-stat-num {
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  font-weight: 700;
  color: var(--snow);
}

.page-about .ab-stat:nth-child(2) .ab-stat-num,
.page-about .ab-stat:nth-child(4) .ab-stat-num {
  color: var(--gold-soft);
}

.page-about .ab-stat-unit {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 通用区块 ---------- */
.page-about .section-head {
  max-width: 46em;
}

.page-about .ab-section-lede {
  margin: 0.9em 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 40em;
}

.page-about .ab-lede-dark {
  color: #4A4A44;
}

.page-about .ab-eyebrow-dark {
  color: #8A6A12;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline-section {
  border-top: var(--border) solid var(--line);
}

.page-about .ab-timeline-head {
  margin-bottom: clamp(28px, 5vw, 52px);
}

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

.page-about .tl-node {
  position: relative;
  padding: 18px 18px 20px;
  border: var(--border) solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard);
  border-radius: 0;
}

.page-about .tl-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .tl-dot {
  width: 11px;
  height: 11px;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--ink);
}

.page-about .tl-node .h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .tl-text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .tl-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: var(--border) solid var(--line);
  background: transparent;
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .tl-toggle::after {
  content: "+";
  font-size: 15px;
  color: var(--gold);
}

.page-about .tl-toggle[aria-expanded="true"]::after {
  content: "−";
}

.page-about .tl-toggle:hover,
.page-about .tl-toggle:focus-visible {
  border-color: var(--gold);
  background: rgba(201, 162, 39, 0.1);
  outline: none;
}

.page-about .tl-toggle:focus-visible {
  box-shadow: 0 0 0 2px var(--gold-soft);
}

.page-about .tl-panel {
  margin-top: 14px;
  padding-top: 14px;
  border-top: var(--border) solid var(--line);
}

.page-about .tl-panel[data-collapsed] {
  display: none;
}

.page-about .tl-panel ul {
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
}

.page-about .tl-panel li {
  position: relative;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  padding-left: 0;
  margin-bottom: 8px;
}

.page-about .tl-panel li::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 10px;
  width: 7px;
  height: 7px;
  background: var(--ember);
}

.page-about .ab-timeline-foot {
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-size: 14px;
  color: var(--mist);
}

.page-about .ab-timeline-foot a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-soft);
  padding-bottom: 1px;
}

.page-about .ab-timeline-foot a:hover {
  color: var(--snow);
  border-color: var(--snow);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  background: var(--snow);
  color: var(--char);
}

.page-about .ab-team .h2,
.page-about .ab-team .h3 {
  color: var(--char);
}

.page-about .ab-team .grid {
  align-items: start;
}

.page-about .team-bar {
  display: flex;
  height: 58px;
  margin: clamp(22px, 3.4vw, 34px) 0 clamp(22px, 3.4vw, 32px);
  border: var(--border) solid var(--char);
  box-shadow: var(--hard);
}

.page-about .team-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  min-width: 44px;
}

.page-about .team-seg--a {
  background: var(--gold);
  color: var(--char);
}

.page-about .team-seg--b {
  background: var(--line);
  color: var(--snow);
}

.page-about .team-seg--c {
  background: var(--ember);
  color: var(--snow);
}

.page-about .team-list {
  display: grid;
  gap: 20px;
}

.page-about .team-item {
  padding-left: 16px;
  border-left: var(--border) solid var(--char);
}

.page-about .team-item .h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
}

.page-about .team-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #3A3833;
}

.page-about .ab-team-figure {
  margin-top: clamp(28px, 4vw, 8px);
}

.page-about .ab-team-figure figure {
  border: var(--border) solid var(--char);
  box-shadow: var(--hard);
  background: var(--paper);
}

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

.page-about .ab-team-figure figcaption {
  padding: 12px 14px 14px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.7;
  color: #45433D;
  border-top: var(--border) solid var(--char);
}

/* ---------- 区域覆盖 ---------- */
.page-about .ab-network {
  position: relative;
  background:
    radial-gradient(circle at 18% 88%, rgba(210, 105, 30, 0.16), transparent 56%),
    var(--ink);
  border-top: var(--border) solid var(--line);
}

.page-about .ab-network-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .ab-network-figure {
  margin: 0 0 clamp(26px, 4vw, 40px);
  border: var(--border) solid var(--line);
  box-shadow: var(--hard-strong);
}

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

.page-about .ab-network-figure figcaption {
  padding: 12px 16px 14px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  border-top: var(--border) solid var(--line);
}

.page-about .ab-network-notes {
  display: grid;
  gap: 16px;
}

.page-about .ab-note {
  padding: 18px;
  border: var(--border) solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard);
  border-radius: 0;
}

.page-about .ab-note-num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .ab-note .h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--snow);
}

.page-about .ab-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 资质 ---------- */
.page-about .ab-trust {
  background: var(--paper);
  color: var(--char);
}

.page-about .ab-trust .h2,
.page-about .ab-trust .h3 {
  color: var(--char);
}

.page-about .ab-trust .grid {
  align-items: start;
}

.page-about .ab-trust-figure {
  margin-bottom: clamp(26px, 4vw, 0);
}

.page-about .ab-trust-figure figure {
  margin: 0;
  border: var(--border) solid var(--char);
  box-shadow: var(--hard);
  background: var(--snow);
}

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

.page-about .ab-trust-figure figcaption {
  padding: 12px 14px 14px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.7;
  color: #45433D;
  border-top: var(--border) solid var(--char);
}

.page-about .trust-list {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .trust-list li {
  padding: 16px 18px;
  border: var(--border) solid var(--char);
  background: var(--snow);
  box-shadow: 4px 4px 0 0 var(--char);
}

.page-about .trust-list .h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  line-height: 1.4;
}

.page-about .trust-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #3A3833;
}

/* ---------- 合作伙伴 ---------- */
.page-about .ab-partners {
  border-top: var(--border) solid var(--line);
}

.page-about .ab-partners .section-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

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

.page-about .partner-step {
  padding: 20px 18px;
  border: var(--border) solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard);
}

.page-about .partner-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .partner-step .h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .partner-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .ab-partners-foot {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-size: 14px;
  color: var(--mist);
}

.page-about .ab-partners-foot a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-soft);
  padding-bottom: 1px;
}

.page-about .ab-partners-foot a:hover {
  color: var(--snow);
  border-color: var(--snow);
}

/* ---------- 服务承诺 ---------- */
.page-about .ab-promise {
  background: var(--panel);
  border-top: var(--border) solid var(--line);
  border-bottom: var(--border) solid var(--line);
}

.page-about .ab-promise .grid {
  align-items: start;
}

.page-about .promise-list {
  display: grid;
  gap: 14px;
}

.page-about .promise-item {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: var(--border) solid var(--line);
  background: var(--ink);
  box-shadow: 4px 4px 0 0 var(--line);
}

.page-about .promise-time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--ember);
  letter-spacing: 0.03em;
}

.page-about .promise-item .h3 {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .promise-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 行动条 ---------- */
.page-about .ab-cta-wrap {
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-about .ab-cta {
  display: grid;
  gap: 20px;
  padding: clamp(22px, 3.6vw, 34px);
  border: var(--border) solid var(--gold);
  background: linear-gradient(120deg, var(--panel), var(--ink) 62%);
  box-shadow: var(--hard-strong);
}

.page-about .ab-cta-title {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 2.4vw, 1.28rem);
  line-height: 1.45;
  color: var(--snow);
}

.page-about .ab-cta-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 34em;
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-about .ab-cta-actions .btn {
  border-radius: 0;
}

.page-about .ab-cta-link {
  font-size: 14px;
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-soft);
  padding-bottom: 2px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.page-about .ab-cta-link:hover {
  color: var(--snow);
  border-color: var(--snow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-stat {
    padding: 18px 16px 20px;
    border-bottom: none;
    border-left: 1px solid var(--line);
  }

  .page-about .ab-stat:nth-child(3n + 1) {
    border-left: none;
  }

  .page-about .ab-network-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .partner-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .promise-item {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: start;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .ab-hero-side {
    margin-top: 26px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: clamp(44px, 6vw, 72px);
  }

  .page-about .ab-stat:nth-child(3n + 1) {
    border-left: 1px solid var(--line);
  }

  .page-about .ab-stat:first-child {
    border-left: none;
  }

  .page-about .ab-stat {
    padding: 20px 18px 22px;
  }

  /* 横向时间轴 */
  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    padding-top: 46px;
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    top: 21px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--line);
  }

  .page-about .timeline {
    position: relative;
  }

  .page-about .tl-node {
    padding: 18px 16px 20px;
  }

  .page-about .tl-mark {
    position: absolute;
    top: -46px;
    left: 16px;
    height: 46px;
    margin: 0;
  }

  .page-about .tl-node:nth-child(2n) {
    margin-top: 22px;
  }

  .page-about .ab-team-figure {
    margin-top: 6px;
    padding-left: 12px;
  }

  .page-about .ab-trust-figure {
    padding-right: 12px;
    margin-bottom: 0;
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 32px;
  }

  .page-about .ab-cta-actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-toggle,
  .page-about .ab-cta-link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>