.page-about {
  --ab-rule: rgba(244, 233, 216, 0.14);
  --ab-paper-ink: #16202E;
  --ab-paper-ink-soft: rgba(22, 32, 46, 0.78);
  --ab-sticky-top: 132px;
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb {
  padding-top: clamp(16px, 2.6vw, 28px);
}
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cream-42);
}
.page-about .breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}
.page-about .breadcrumb li + li::before {
  content: "/";
  color: rgba(240, 138, 36, 0.6);
}
.page-about .breadcrumb a {
  color: var(--cream-64);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--amber);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--amber);
}

/* ---------- 通用小标签 ---------- */
.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-about .ab-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--tiger), var(--neon));
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
  padding-top: clamp(18px, 3vw, 34px);
  padding-bottom: clamp(30px, 5vw, 56px);
}
.page-about .ab-hero__copy {
  min-width: 0;
}
.page-about .ab-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-about .ab-hero__kicker::before {
  content: "";
  width: 28px;
  height: 3px;
  background: linear-gradient(90deg, var(--tiger), var(--neon));
  border-radius: 2px;
}
.page-about .ab-hero h1 {
  margin: 16px 0 18px;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.012em;
  color: var(--cream);
  text-wrap: balance;
}
.page-about .ab-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--cream-80);
}
.page-about .ab-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-hero__visual {
  position: relative;
  margin: 0;
  min-width: 0;
}
.page-about .ab-hero__visual::after {
  content: "";
  position: absolute;
  inset: auto -6px -8px auto;
  width: 42%;
  height: 4px;
  background: linear-gradient(90deg, var(--tiger), var(--violet), var(--neon));
  opacity: 0.7;
  pointer-events: none;
}
.page-about .ab-hero__visual .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-hero__visual .media__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--cream-42);
}

/* ---------- 档案两栏 ---------- */
.page-about .ab-archive {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  padding-top: clamp(18px, 3vw, 36px);
}
.page-about .ab-index {
  border-top: 2px solid var(--tiger);
  padding-top: 14px;
  min-width: 0;
}
.page-about .ab-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cream-42);
}
.page-about .ab-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  counter-reset: abidx;
}
.page-about .ab-index__list li {
  min-width: 0;
}
.page-about .ab-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--ab-rule);
  color: var(--cream-64);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.page-about .ab-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--tiger);
  letter-spacing: 0.05em;
  flex: none;
}
.page-about .ab-index__list a:hover,
.page-about .ab-index__list a:focus-visible {
  color: var(--amber);
  padding-left: 8px;
}
.page-about .ab-index__list a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-about .ab-body {
  min-width: 0;
}
.page-about .ab-block {
  position: relative;
  margin: 0 0 clamp(16px, 2.6vw, 26px);
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: linear-gradient(150deg, rgba(16, 42, 36, 0.55), rgba(11, 18, 32, 0.45));
  overflow: hidden;
}
.page-about .ab-block:last-child {
  margin-bottom: 0;
}
.page-about .ab-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -24deg,
    rgba(240, 138, 36, 0.05) 0 2px,
    transparent 2px 26px
  );
  pointer-events: none;
}
.page-about .ab-block > * {
  position: relative;
}
.page-about .ab-block h2 {
  margin: 0 0 14px;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.28;
  font-weight: 800;
  color: var(--cream);
  text-wrap: balance;
}
.page-about .ab-block p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--cream-80);
}
.page-about .ab-block p:last-child {
  margin-bottom: 0;
}
.page-about .ab-block--paper {
  background: var(--cream);
  border-color: transparent;
  color: var(--ab-paper-ink);
}
.page-about .ab-block--paper::before {
  background: repeating-linear-gradient(
    -24deg,
    rgba(240, 138, 36, 0.10) 0 2px,
    transparent 2px 30px
  );
}
.page-about .ab-block--paper .ab-kicker {
  color: var(--clay);
}
.page-about .ab-block--paper .ab-kicker::before {
  background: linear-gradient(90deg, var(--tiger), var(--clay));
}
.page-about .ab-block--paper h2 {
  color: var(--night);
}
.page-about .ab-block--paper p {
  color: var(--ab-paper-ink-soft);
}

/* ---------- 四条内容线 ---------- */
.page-about .ab-lines {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .ab-line {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: 16px 16px 16px 18px;
  border-left: 3px solid var(--tiger);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(11, 18, 32, 0.5);
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .ab-line:hover,
.page-about .ab-line:focus-visible {
  transform: translateY(-3px);
  border-left-color: var(--neon);
  background: rgba(16, 42, 36, 0.65);
}
.page-about .ab-line:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}
.page-about .ab-line .tag {
  align-self: flex-start;
}
.page-about .ab-line__title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.4;
}
.page-about .ab-line__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--cream-64);
}

/* ---------- 团队与共建 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.5vw, 24px);
  margin-bottom: clamp(18px, 3vw, 26px);
}
.page-about .ab-team__copy {
  min-width: 0;
}
.page-about .ab-team__figure {
  margin: 0;
  min-width: 0;
}
.page-about .ab-team__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-s);
}
.page-about .ab-team__figure .media__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--cream-42);
}
.page-about .ab-stats {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  background: rgba(7, 12, 21, 0.4);
}
.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}
.page-about .ab-stat__label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--cream-64);
}

/* ---------- 五道把关 ---------- */
.page-about .ab-review {
  padding-top: clamp(34px, 5vw, 64px);
  padding-bottom: clamp(30px, 4.5vw, 56px);
}
.page-about .ab-review__head {
  max-width: 52em;
  margin-bottom: clamp(18px, 3vw, 28px);
}
.page-about .ab-review h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.24;
  font-weight: 800;
  color: var(--cream);
}
.page-about .ab-review__lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--cream-64);
}
.page-about .ab-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}
.page-about .ab-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  background: linear-gradient(120deg, rgba(16, 42, 36, 0.52), rgba(11, 18, 32, 0.38));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .ab-step:hover {
  border-color: var(--line-tiger);
  transform: translateY(-2px);
}
.page-about .ab-step__no {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--neon);
}
.page-about .ab-step__body {
  min-width: 0;
}
.page-about .ab-step__title {
  margin: 0 0 5px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--cream);
}
.page-about .ab-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--cream-64);
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  padding-top: clamp(30px, 4.5vw, 56px);
  padding-bottom: clamp(30px, 4.5vw, 56px);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(80% 60% at 12% 0%, rgba(240, 138, 36, 0.10), transparent 62%),
    radial-gradient(70% 55% at 92% 100%, rgba(168, 85, 247, 0.10), transparent 60%);
}
.page-about .ab-timeline__head {
  max-width: 48em;
  margin-bottom: clamp(20px, 3vw, 32px);
}
.page-about .ab-timeline h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.24;
  font-weight: 800;
  color: var(--cream);
}
.page-about .ab-timeline__lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--cream-64);
}
.page-about .ab-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}
.page-about .ab-years {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  min-width: 0;
}
.page-about .ab-years::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--tiger), var(--violet) 58%, var(--neon));
  opacity: 0.5;
}
.page-about .ab-year {
  position: relative;
  padding: 0 0 20px 36px;
  min-width: 0;
}
.page-about .ab-year:last-child {
  padding-bottom: 0;
}
.page-about .ab-year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--tiger);
  box-shadow: 0 0 0 3px rgba(240, 138, 36, 0.14);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .ab-year:hover::before {
  border-color: var(--neon);
  box-shadow: 0 0 0 5px rgba(244, 255, 94, 0.18);
}
.page-about .ab-year__num {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}
.page-about .ab-year__body h3 {
  margin: 0 0 4px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--cream);
}
.page-about .ab-year__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cream-64);
}
.page-about .ab-timeline__figure {
  margin: 0;
  min-width: 0;
}
.page-about .ab-timeline__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-s);
}
.page-about .ab-timeline__figure .media__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--cream-42);
}
.page-about .ab-timeline__note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cream-64);
}
.page-about .ab-timeline__note a {
  color: var(--amber);
  text-underline-offset: 3px;
  text-decoration: underline;
  text-decoration-color: var(--line-tiger);
  transition: color var(--dur) var(--ease);
}
.page-about .ab-timeline__note a:hover,
.page-about .ab-timeline__note a:focus-visible {
  color: var(--neon);
}

/* ---------- 四项承诺 ---------- */
.page-about .ab-pledges {
  padding-top: clamp(30px, 4.5vw, 56px);
  padding-bottom: clamp(24px, 3.5vw, 44px);
}
.page-about .ab-pledges__head {
  margin-bottom: clamp(16px, 2.6vw, 24px);
}
.page-about .ab-pledges h2 {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.24;
  font-weight: 800;
  color: var(--cream);
}
.page-about .ab-pledge-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .ab-pledge {
  position: relative;
  padding: 20px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: rgba(11, 18, 32, 0.55);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .ab-pledge:hover {
  transform: translateY(-3px);
  border-color: var(--line-tiger);
}
.page-about .ab-pledge::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tiger), var(--neon));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.page-about .ab-pledge:hover::after {
  transform: scaleX(1);
}
.page-about .ab-pledge__mark {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--violet);
}
.page-about .ab-pledge__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}
.page-about .ab-pledge__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--cream-64);
}

/* ---------- 结尾 CTA ---------- */
.page-about .ab-cta {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.5vw, 24px);
  align-items: flex-start;
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line-tiger);
  border-radius: var(--radius-l);
  background:
    linear-gradient(130deg, rgba(240, 138, 36, 0.16), rgba(16, 42, 36, 0.6) 55%, rgba(11, 18, 32, 0.7));
}
.page-about .ab-cta__copy {
  min-width: 0;
}
.page-about .ab-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.28;
  font-weight: 800;
  color: var(--cream);
}
.page-about .ab-cta p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--cream-80);
}
.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  flex: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .ab-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-pledge-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 780px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(26px, 3.6vw, 52px);
  }
  .page-about .ab-hero__visual {
    margin-top: 8px;
  }
  .page-about .ab-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .page-about .ab-step:nth-child(2) {
    margin-left: 24px;
  }
  .page-about .ab-step:nth-child(3) {
    margin-left: 48px;
  }
  .page-about .ab-step:nth-child(4) {
    margin-left: 72px;
  }
  .page-about .ab-step:nth-child(5) {
    margin-left: 96px;
  }
  .page-about .ab-timeline__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .ab-pledge-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .ab-archive {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }
  .page-about .ab-index {
    position: sticky;
    top: var(--ab-sticky-top);
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-line,
  .page-about .ab-step,
  .page-about .ab-pledge,
  .page-about .ab-index__list a,
  .page-about .ab-line:hover,
  .page-about .ab-step:hover,
  .page-about .ab-pledge:hover {
    transform: none !important;
    transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease) !important;
  }
  .page-about .ab-pledge::after {
    transition: none;
  }
}
<<<END>>>