.page-about {
  --ab-pad: clamp(52px, 9vw, 108px);
  --ab-paper-line: rgba(12, 42, 34, 0.18);
  --ab-paper-ink: rgba(12, 42, 34, 0.9);
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0 0 clamp(22px, 4vw, 40px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fog);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line);
}

.page-about .breadcrumbs a {
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.page-about .breadcrumbs li[aria-current="page"] {
  color: var(--gold-soft);
}

/* ---------- 通用标题与正文 ---------- */
.page-about .ab-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 22ch;
}

.page-about .eyebrow {
  margin: 0 0 clamp(12px, 2vw, 18px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(44px, 7vw, 88px);
  border-bottom: var(--hair);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(232, 180, 74, 0.16), transparent 58%),
    radial-gradient(90% 80% at -5% 105%, rgba(92, 225, 230, 0.08), transparent 62%);
  pointer-events: none;
}

.page-about .ab-hero .wrap {
  position: relative;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.012em;
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 17ch;
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--fog);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-stats li {
  background: var(--ink);
  padding: clamp(14px, 2.4vw, 20px) clamp(12px, 2vw, 18px);
}

.page-about .ab-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--fog);
}

/* ---------- 品牌起点 ---------- */
.page-about .ab-origin {
  padding: var(--ab-pad) 0;
  background: var(--ink);
}

.page-about .ab-origin__grid {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
}

.page-about .ab-origin__text p {
  margin: 0 0 1em;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--fog);
}

.page-about .ab-origin__figure {
  margin: 0;
}

.page-about .ab-origin__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
  filter: saturate(0.86) contrast(1.06);
}

.page-about .ab-origin__figure .figure__caption {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fog);
}

.page-about .ab-checklist {
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--hair);
}

.page-about .ab-checklist li {
  position: relative;
  padding: 15px 0 15px 24px;
  border-bottom: var(--hair);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .ab-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 12px;
  height: 1px;
  background: var(--gold);
}

/* ---------- 主张 ---------- */
.page-about .ab-pillars-section {
  padding: var(--ab-pad) 0;
  background: var(--ink-2);
  border-top: var(--hair);
  border-bottom: var(--hair);
}

.page-about .ab-pillars__head {
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .ab-pillars__intro {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fog);
}

.page-about .ab-pillars {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--hair);
}

.page-about .ab-pillar {
  display: grid;
  gap: 8px;
  padding: clamp(22px, 3.4vw, 34px) clamp(0px, 1.6vw, 18px);
  border-bottom: var(--hair);
  border-left: 2px solid transparent;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-pillar:hover,
.page-about .ab-pillar:focus-within {
  background: rgba(232, 180, 74, 0.06);
  border-left-color: var(--gold);
}

.page-about .ab-pillar__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .ab-pillar__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.8vw, 27px);
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .ab-pillar__desc {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

/* ---------- 团队 ---------- */
.page-about .ab-crew-section {
  padding: var(--ab-pad) 0;
  background: var(--ink);
}

.page-about .ab-crew__head {
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .ab-crew__intro {
  margin: 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fog);
}

.page-about .ab-crew {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--hair);
}

.page-about .ab-crew__item {
  display: grid;
  gap: 8px 20px;
  padding: clamp(20px, 3vw, 30px) 0 clamp(20px, 3vw, 30px) clamp(0px, 1.4vw, 16px);
  border-bottom: var(--hair);
  border-left: 2px solid transparent;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-crew__item:hover,
.page-about .ab-crew__item:focus-within {
  background: rgba(92, 225, 230, 0.05);
  border-left-color: var(--gold);
}

.page-about .ab-crew__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-crew__role {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 23px);
  color: var(--white);
}

.page-about .ab-crew__duty {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--fog);
}

.page-about .ab-crew__count {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-crew__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

.page-about .ab-crew__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(180px, 30vw, 340px);
  object-fit: cover;
  border-left: 3px solid var(--brick);
}

.page-about .ab-crew__figure .figure__caption {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fog);
}

.page-about .ab-crew__link {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-about .ab-crew__link a {
  display: inline-block;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 3px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .ab-crew__link a:hover,
.page-about .ab-crew__link a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline-section {
  padding: var(--ab-pad) 0;
  background: var(--ink-2);
  border-top: var(--hair);
  border-bottom: var(--hair);
}

.page-about .ab-timeline__head {
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .ab-timeline__intro {
  margin: 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fog);
}

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

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--line) 62%, transparent);
}

.page-about .ab-timeline__item {
  position: relative;
  padding-left: 40px;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(92, 225, 230, 0.14);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .ab-timeline__item:has(details[open])::before {
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(232, 180, 74, 0.18);
}

.page-about .ab-timeline__node {
  border-bottom: var(--hair);
}

.page-about .ab-timeline__node summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: -0.01em;
  color: var(--white);
  transition: color 0.18s var(--ease);
}

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

.page-about .ab-timeline__node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  color: var(--gold);
}

.page-about .ab-timeline__node[open] summary::after {
  content: "−";
}

.page-about .ab-timeline__node summary:hover,
.page-about .ab-timeline__node summary:focus-visible {
  color: var(--gold-soft);
  outline: none;
}

.page-about .ab-timeline__node summary:focus-visible {
  box-shadow: 0 0 0 1px var(--gold);
}

.page-about .ab-timeline__content {
  padding: 0 0 20px;
  animation: ab-fade 0.18s var(--ease);
}

.page-about .ab-timeline__content p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

@keyframes ab-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 合作与荣誉（纸白区） ---------- */
.page-about .ab-partner {
  padding: var(--ab-pad) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .ab-partner .eyebrow {
  color: #5C6F66;
}

.page-about .ab-partner .ab-h2 {
  color: var(--ink);
}

.page-about .ab-partner__intro {
  margin: 0 0 clamp(26px, 4vw, 40px);
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ab-paper-ink);
}

.page-about .ab-partner__figure {
  margin: 0 0 clamp(30px, 5vw, 50px);
}

.page-about .ab-partner__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(190px, 30vw, 360px);
  object-fit: cover;
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .ab-partner__figure .figure__caption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #5C6F66;
}

.page-about .ab-tablewrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .ab-table caption {
  caption-side: top;
  padding: 0 0 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: #5C6F66;
}

.page-about .ab-table thead th {
  padding: 10px 14px 10px 0;
  text-align: left;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: #5C6F66;
  border-bottom: 1px solid var(--ab-paper-line);
  white-space: nowrap;
}

.page-about .ab-table tbody th {
  padding: 16px 14px 16px 0;
  text-align: left;
  font-weight: 700;
  font-size: 14.5px;
  color: var(--ink);
  border-bottom: 1px solid var(--ab-paper-line);
  vertical-align: top;
  white-space: nowrap;
}

.page-about .ab-table tbody td {
  padding: 16px 14px 16px 0;
  vertical-align: top;
  line-height: 1.75;
  color: var(--ab-paper-ink);
  border-bottom: 1px solid var(--ab-paper-line);
}

.page-about .ab-table tbody tr:hover td,
.page-about .ab-table tbody tr:hover th {
  background: rgba(200, 85, 61, 0.06);
}

.page-about .ab-honors {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ab-paper-line);
}

.page-about .ab-honors li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 6px 12px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--ab-paper-line);
}

.page-about .ab-honors__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-honors__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .ab-honors__year {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: #5C6F66;
}

/* ---------- 服务承诺 ---------- */
.page-about .ab-promise-section {
  padding: var(--ab-pad) 0;
  background: var(--ink);
}

.page-about .ab-promise {
  display: grid;
  border-top: var(--hair);
}

.page-about .ab-promise__col {
  padding: clamp(22px, 3.2vw, 32px) 0;
  border-bottom: var(--hair);
}

.page-about .ab-promise__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .ab-promise__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

/* ---------- 收口 CTA ---------- */
.page-about .ab-cta {
  padding: 0 0 var(--ab-pad);
  background: var(--ink);
}

.page-about .ab-cta__inner {
  padding: clamp(28px, 4.4vw, 52px) clamp(20px, 3.4vw, 44px);
  border: var(--hair);
  border-left: 3px solid var(--gold);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(232, 180, 74, 0.12), transparent 60%),
    var(--ink-2);
}

.page-about .ab-cta__text {
  margin: 0 0 clamp(22px, 3vw, 30px);
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fog);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-promise__col {
    padding-right: clamp(0px, 2vw, 24px);
  }
}

@media (min-width: 780px) {
  .page-about .ab-pillar {
    grid-template-columns: 68px minmax(0, 210px) minmax(0, 1fr);
    align-items: baseline;
    gap: 6px clamp(16px, 3vw, 32px);
  }

  .page-about .ab-honors li {
    grid-template-columns: 58px minmax(0, 1fr) 80px;
  }

  .page-about .ab-honors__year {
    grid-column: 3;
    text-align: right;
  }
}

@media (min-width: 820px) {
  .page-about .ab-crew__item {
    grid-template-columns: 56px minmax(0, 190px) minmax(0, 1fr) 76px;
    align-items: baseline;
  }

  .page-about .ab-crew__count {
    text-align: right;
  }

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

  .page-about .ab-promise__col {
    border-bottom: none;
    border-top: 1px solid transparent;
  }

  .page-about .ab-promise__col + .ab-promise__col {
    border-left: var(--hair);
    padding-left: clamp(18px, 2.2vw, 30px);
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .ab-hero__aside {
    padding-bottom: 4px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(32px, 5vw, 68px);
  }

  .page-about .ab-origin__figure {
    margin-top: -12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-pillar,
  .page-about .ab-crew__item,
  .page-about .ab-timeline__item::before,
  .page-about .ab-crew__link a,
  .page-about .breadcrumbs a {
    transition: none;
  }

  .page-about .ab-timeline__content {
    animation: none;
  }
}

```