.page-about {
  --ab-line: rgba(155, 176, 198, 0.28);
  --ab-line-dark: rgba(10, 16, 23, 0.16);
  --ab-shadow: 6px 6px 0 rgba(6, 20, 38, 0.1);
  --ab-shadow-deep: 5px 5px 0 rgba(0, 0, 0, 0.24);
  background: var(--ink-900);
  color: var(--frost);
  overflow-x: hidden;
}

.page-about .ab-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .ab-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--speed) ease-out, border-color var(--speed) ease-out;
}

.page-about .ab-crumb a:hover,
.page-about .ab-crumb a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .ab-crumb [aria-current="page"] {
  color: var(--frost);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 60px) 0 clamp(34px, 5vw, 72px);
  border-bottom: 1px solid var(--ab-line);
  background:
    radial-gradient(900px 380px at 82% -14%, rgba(184, 255, 61, 0.11), transparent 72%),
    radial-gradient(620px 320px at 4% 108%, rgba(255, 176, 32, 0.09), transparent 70%),
    var(--ink-900);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .ab-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .ab-kicker--dark {
  color: #9A6B00;
}

.page-about .ab-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 5.4vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--frost);
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.74;
  color: var(--frost);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 按钮 ---------- */
.page-about .ab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--speed) ease-out, background var(--speed) ease-out,
    color var(--speed) ease-out, border-color var(--speed) ease-out;
}

.page-about .ab-btn--solid {
  background: var(--lime);
  color: var(--ink-900);
  border-color: var(--lime);
}

.page-about .ab-btn--solid:hover,
.page-about .ab-btn--solid:focus-visible {
  background: var(--lime-soft);
  transform: translateY(-2px);
  outline: none;
}

.page-about .ab-btn--line {
  background: transparent;
  color: var(--frost);
  border-color: var(--ink-500);
}

.page-about .ab-btn--line:hover,
.page-about .ab-btn--line:focus-visible {
  border-color: var(--amber);
  color: var(--amber);
  transform: translateY(-2px);
  outline: none;
}

.page-about .ab-btn--ink {
  background: var(--ink-900);
  color: var(--frost);
  border-color: var(--ink-900);
}

.page-about .ab-btn--ink:hover,
.page-about .ab-btn--ink:focus-visible {
  background: var(--ink-700);
  border-color: var(--amber);
  transform: translateY(-2px);
  outline: none;
}

.page-about .ab-btn:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* ---------- 档案卡 ---------- */
.page-about .ab-dossier {
  position: relative;
  padding: 18px 18px 16px;
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
  box-shadow: var(--ab-shadow);
}

.page-about .ab-dossier::before {
  content: "";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 26px;
  height: 26px;
  border-top: 1px solid var(--ink-500);
  border-right: 1px solid var(--ink-500);
  pointer-events: none;
}

.page-about .ab-dossier__stamp {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .ab-nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-num {
  padding: 12px 12px 11px;
  background: rgba(6, 20, 38, 0.55);
  border: 1px solid var(--ab-line);
}

.page-about .ab-num b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.05;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-num b small {
  font-size: 0.5em;
  color: var(--lime-soft);
  margin-left: 2px;
}

.page-about .ab-num span {
  display: block;
  margin-top: 6px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ab-dossier__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ab-line);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 文件夹标签 ---------- */
.page-about .ab-files {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .ab-file {
  display: inline-block;
  max-width: 100%;
  padding: 8px 18px 8px 14px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--frost);
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 100%, 0 100%);
  transition: background var(--speed) ease-out, color var(--speed) ease-out,
    border-color var(--speed) ease-out;
}

.page-about .ab-file:hover,
.page-about .ab-file:focus-visible {
  background: var(--lime);
  color: var(--ink-900);
  border-color: var(--lime);
  outline: none;
}

/* ---------- 区块骨架 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: clamp(40px, 6vw, 84px) 0;
}

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

.page-about .ab-deep {
  background:
    linear-gradient(180deg, rgba(11, 39, 69, 0.6), transparent 120px),
    var(--ink-900);
  color: var(--frost);
}

.page-about .ab-head {
  margin-bottom: clamp(24px, 3.4vw, 36px);
}

.page-about .ab-h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

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

.page-about .ab-h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--frost);
}

.page-about .ab-sub {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .ab-copy {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.74;
  color: rgba(10, 16, 23, 0.82);
}

.page-about .ab-copy--tight {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--ab-line-dark);
}

.page-about .ab-copy--light {
  color: var(--mist);
}

.page-about .ab-split {
  display: grid;
  gap: clamp(20px, 3.5vw, 40px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .ab-ticks {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-line-dark);
}

.page-about .ab-ticks li {
  position: relative;
  padding: 10px 0 10px 22px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(10, 16, 23, 0.8);
  border-bottom: 1px solid var(--ab-line-dark);
}

.page-about .ab-ticks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 17px;
  width: 8px;
  height: 8px;
  background: var(--lime);
  border: 1px solid var(--ink-900);
}

/* ---------- 图片 ---------- */
.page-about .ab-figure {
  margin: 0;
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
  box-shadow: var(--ab-shadow);
}

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

.page-about .ab-figure figcaption {
  padding: 10px 13px;
  border-top: 1px solid var(--ab-line);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .ab-paper .ab-figure {
  border-color: var(--ab-line-dark);
  box-shadow: var(--ab-shadow);
}

.page-about .ab-paper .ab-figure figcaption {
  border-top-color: var(--ab-line-dark);
  color: rgba(10, 16, 23, 0.62);
  background: rgba(255, 255, 255, 0.55);
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 2px solid var(--ink-500);
}

.page-about .ab-tl {
  position: relative;
  margin: 0 0 14px;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 17px;
  width: 12px;
  height: 12px;
  background: var(--ink-900);
  border: 2px solid var(--lime);
  border-radius: 50%;
}

.page-about .ab-tl__item {
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
  box-shadow: var(--ab-shadow-deep);
  transition: border-color var(--speed) ease-out, transform var(--speed) ease-out;
}

.page-about .ab-tl__item:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 176, 32, 0.6);
}

.page-about .ab-tl__item[open] {
  border-color: rgba(184, 255, 61, 0.55);
}

.page-about .ab-tl__item summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ab-tl__item summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--amber);
}

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

.page-about .ab-tl__item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .ab-tl__year {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__head {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--frost);
  line-height: 1.5;
}

.page-about .ab-tl__body {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--ab-line);
  margin-top: 2px;
  padding-top: 12px;
}

.page-about .ab-tl__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 岗位标签墙 ---------- */
.page-about .ab-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-start;
}

.page-about .ab-role {
  flex: 0 1 auto;
  max-width: 100%;
  background: #FFFFFF;
  border: 1px solid var(--ab-line-dark);
  box-shadow: 3px 3px 0 rgba(10, 16, 23, 0.1);
}

.page-about .ab-role summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 20px 10px 15px;
  cursor: pointer;
  list-style: none;
  background: var(--ink-900);
  color: var(--frost);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 100%, 0 100%);
  transition: background var(--speed) ease-out, color var(--speed) ease-out;
}

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

.page-about .ab-role summary em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 15px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .ab-role summary:hover {
  background: var(--ink-700);
}

.page-about .ab-role summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -3px;
}

.page-about .ab-role[open] summary {
  background: var(--lime);
  color: var(--ink-900);
}

.page-about .ab-role[open] summary em {
  color: var(--ink-900);
}

.page-about .ab-role__body {
  padding: 12px 14px 13px;
  max-width: 340px;
}

.page-about .ab-role__body p {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.68;
  color: rgba(10, 16, 23, 0.78);
}

/* ---------- 四步 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .ab-step {
  padding: 16px 15px 18px;
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
  border-top: 2px solid var(--amber);
  transition: transform var(--speed) ease-out, border-color var(--speed) ease-out;
}

.page-about .ab-step:hover {
  transform: translateY(-2px);
  border-color: rgba(184, 255, 61, 0.55);
  border-top-color: var(--lime);
}

.page-about .ab-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-step h3 {
  margin: 10px 0 7px;
  font-size: 16px;
  font-weight: 800;
  color: var(--frost);
}

.page-about .ab-step p {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.68;
  color: var(--mist);
}

.page-about .ab-method__note {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  background: rgba(11, 39, 69, 0.7);
  font-size: 14px;
  line-height: 1.7;
  color: var(--frost);
}

/* ---------- 新疆 ---------- */
.page-about .ab-xj {
  overflow: hidden;
}

.page-about .ab-xj__ridge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 170px;
  color: var(--ink-900);
  opacity: 0.07;
  pointer-events: none;
}

.page-about .ab-xj .sd-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-figure--wide {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .ab-xj__text {
  max-width: 860px;
}

/* ---------- 合作 ---------- */
.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: clamp(24px, 3.4vw, 36px);
}

.page-about .ab-metric {
  padding-top: 10px;
  border-top: 2px solid var(--amber);
}

.page-about .ab-metric b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.05;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-metric b small {
  font-size: 0.46em;
  color: var(--lime-soft);
  margin-left: 2px;
}

.page-about .ab-metric span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .ab-partner__cols {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}

/* ---------- 结尾入口 ---------- */
.page-about .ab-cta {
  padding: clamp(38px, 5.4vw, 72px) 0;
  background: var(--paper);
  color: var(--ink);
  border-top: 4px solid var(--lime);
}

.page-about .ab-cta__grid {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .ab-cta .ab-h2 {
  margin-bottom: 12px;
}

.page-about .ab-cta .ab-copy {
  max-width: 58ch;
}

.page-about .ab-cta__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.page-about .ab-cta__feedback {
  font-size: 13px;
  font-weight: 700;
  color: #2E6B00;
}

.page-about .ab-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-copy {
    font-size: 16px;
  }

  .page-about .ab-steps {
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-about .ab-cta__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

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

  .page-about .ab-timeline {
    padding-left: 34px;
  }

  .page-about .ab-tl::before {
    left: -42px;
  }
}

@media (min-width: 1020px) {
  .page-about .ab-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .page-about .ab-num b {
    font-size: 21px;
  }

  .page-about .ab-file {
    font-size: 12px;
    padding: 7px 15px 7px 12px;
  }

  .page-about .ab-tl__item summary {
    gap: 9px;
    padding: 12px 13px;
  }

  .page-about .ab-tl__head {
    font-size: 13.5px;
  }

  .page-about .ab-step__no {
    font-size: 27px;
  }

  .page-about .ab-btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-btn:hover,
  .page-about .ab-btn:focus-visible,
  .page-about .ab-step:hover,
  .page-about .ab-tl__item:hover {
    transform: none;
  }
}
<<<END>>>