.page-about {
  --ab-line: rgba(214, 168, 75, 0.22);
  --ab-line-soft: rgba(247, 244, 237, 0.09);
  --ab-panel: rgba(18, 40, 76, 0.62);
  --ab-shadow: 0 22px 54px rgba(5, 10, 18, 0.42);
  --ab-radius: 3px;
  background: var(--yl-ink);
  color: var(--yl-paper);
  overflow-x: hidden;
}

.page-about .ab-hero {
  position: relative;
  padding-top: clamp(28px, 6vw, 64px);
  background:
    radial-gradient(1100px 520px at 12% -10%, rgba(214, 168, 75, 0.14), transparent 62%),
    radial-gradient(760px 420px at 96% 8%, rgba(255, 122, 89, 0.08), transparent 60%),
    var(--yl-ink);
}

.page-about .ab-breadcrumb {
  margin-bottom: clamp(26px, 5vw, 52px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--yl-gold);
}

.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--yl-paper);
  max-width: 17em;
}

.page-about .ab-hero__lede {
  margin: 0 0 30px;
  max-width: 40em;
  color: rgba(247, 244, 237, 0.82);
}

.page-about .ab-hero__actions {
  flex-wrap: wrap;
}

.page-about .ab-facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line-soft);
  border: 1px solid var(--ab-line-soft);
  border-radius: var(--ab-radius);
  overflow: hidden;
}

.page-about .ab-facts__item {
  padding: 16px 16px 18px;
  background: var(--yl-ink-2);
}

.page-about .ab-facts__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yl-warmgray);
}

.page-about .ab-facts__value {
  margin: 0;
  font-family: var(--yl-mono);
  font-size: clamp(16px, 2.6vw, 21px);
  line-height: 1.35;
  color: var(--yl-amber);
  word-break: break-word;
}

.page-about .ab-index {
  margin-top: clamp(34px, 6vw, 66px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 6px;
  border-top: 1px solid var(--ab-line-soft);
  padding-top: 20px;
}

.page-about .ab-index .yl-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  font-size: 14px;
  color: var(--yl-paper);
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-about .ab-index .yl-index__link:hover,
.page-about .ab-index .yl-index__link:focus-visible {
  background: rgba(214, 168, 75, 0.12);
  border-color: var(--yl-gold);
  color: var(--yl-amber);
}

.page-about .ab-index .yl-index__num {
  font-family: var(--yl-mono);
  font-size: 11px;
  color: var(--yl-gold);
}

.page-about .ab-strap {
  display: grid;
  grid-template-columns: 3fr 1fr 1fr 2fr;
  height: 6px;
  gap: 0;
}

.page-about .ab-strap__seg {
  display: block;
  height: 100%;
}

.page-about .ab-strap__seg--gold { background: var(--yl-gold); }
.page-about .ab-strap__seg--coral { background: var(--yl-coral); }
.page-about .ab-strap__seg--jade { background: var(--yl-jade); }
.page-about .ab-strap__seg--mid { background: var(--yl-ink-2); }

.page-about .ab-head {
  max-width: 46em;
  margin-bottom: clamp(30px, 5vw, 54px);
}

.page-about .ab-head .yl-section__num {
  color: var(--yl-gold);
}

.page-about .ab-history {
  background:
    linear-gradient(180deg, rgba(214, 168, 75, 0.05), transparent 22%),
    var(--yl-ink-2);
}

.page-about .ab-history__stage {
  display: grid;
  gap: 20px;
  margin-bottom: clamp(30px, 5vw, 50px);
}

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

.page-about .yl-figure__img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: var(--ab-radius);
}

.page-about .yl-figure__cap {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--yl-warmgray);
}

.page-about .ab-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--ab-line-soft);
  border-left: 3px solid var(--yl-gold);
  border-radius: var(--ab-radius);
  background: rgba(5, 10, 18, 0.34);
}

.page-about .ab-toolbar .yl-toolbar__status {
  margin-left: auto;
  font-size: 12.5px;
  color: var(--yl-warmgray);
  font-family: var(--yl-mono);
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  border-left: 2px solid var(--ab-line);
}

.page-about .ab-node {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .ab-node:last-child {
  padding-bottom: 0;
}

.page-about .ab-node__dot {
  position: absolute;
  left: -33px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--yl-ink-2);
  border: 2px solid var(--yl-gold);
}

.page-about .ab-node[data-cat="device"] .ab-node__dot { border-color: var(--yl-coral); }
.page-about .ab-node[data-cat="content"] .ab-node__dot { border-color: var(--yl-jade); }

.page-about .yl-timeline__date {
  display: inline-block;
  margin: 0 0 8px;
  padding: 3px 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--yl-amber);
  background: rgba(214, 168, 75, 0.12);
  border-radius: 2px;
}

.page-about .ab-node__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 3vw, 23px);
  line-height: 1.35;
  font-weight: 700;
  color: var(--yl-paper);
}

.page-about .ab-node__text {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.76);
}

.page-about .ab-history .yl-is-filtered {
  display: none;
}

.page-about .ab-process {
  background: var(--yl-ink);
}

.page-about .ab-process__grid {
  gap: 18px;
}

.page-about .ab-card {
  position: relative;
  padding: 24px 22px 26px;
  background: linear-gradient(160deg, rgba(18, 40, 76, 0.9), rgba(11, 27, 51, 0.86));
  border: 1px solid var(--ab-line-soft);
  border-top: 2px solid var(--yl-gold);
  box-shadow: var(--ab-shadow);
}

.page-about .ab-card:nth-child(2) { border-top-color: var(--yl-coral); }
.page-about .ab-card:nth-child(3) { border-top-color: var(--yl-jade); }
.page-about .ab-card:nth-child(4) { border-top-color: var(--yl-amber); }

.page-about .ab-card .yl-card__meta {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--yl-warmgray);
}

.page-about .ab-card .yl-card__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.6vw, 20px);
  line-height: 1.4;
  font-weight: 700;
  color: var(--yl-paper);
}

.page-about .ab-card .yl-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.76);
}

.page-about .ab-copypath {
  margin-top: clamp(26px, 4vw, 42px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  border: 1px dashed var(--ab-line);
  border-radius: var(--ab-radius);
  background: rgba(5, 10, 18, 0.32);
}

.page-about .ab-copypath__text {
  margin: 0;
  flex: 1 1 260px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 244, 237, 0.8);
}

.page-about .ab-copypath .yl-mono {
  color: var(--yl-amber);
}

.page-about .ab-process__links {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-linkcard {
  display: block;
  padding: 22px 20px;
  text-decoration: none;
  background: rgba(18, 40, 76, 0.55);
  border: 1px solid var(--ab-line-soft);
  border-left: 3px solid var(--yl-coral);
  border-radius: var(--ab-radius);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .ab-linkcard:last-child {
  border-left-color: var(--yl-jade);
}

.page-about .ab-linkcard:hover,
.page-about .ab-linkcard:focus-visible {
  background: rgba(18, 40, 76, 0.85);
  border-color: var(--yl-gold);
  transform: translateY(-2px);
}

.page-about .ab-linkcard .yl-card__title {
  color: var(--yl-paper);
}

.page-about .ab-team {
  background:
    linear-gradient(180deg, rgba(79, 174, 155, 0.06), transparent 30%),
    var(--yl-ink-2);
}

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
}

.page-about .ab-team__lead .yl-section__num {
  color: var(--yl-jade);
}

.page-about .ab-team__lead .yl-section__title {
  margin-top: 10px;
}

.page-about .ab-roles {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-role {
  padding: 16px 18px;
  border-left: 2px solid var(--ab-line);
  background: rgba(5, 10, 18, 0.26);
  border-radius: 0 var(--ab-radius) var(--ab-radius) 0;
}

.page-about .ab-role__tag {
  display: inline-block;
  margin-bottom: 8px;
}

.page-about .ab-role__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.78);
}

.page-about .ab-team__aside {
  display: grid;
  gap: 18px;
}

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

.page-about .ab-yunnan {
  padding: 20px 20px 22px;
  background: linear-gradient(150deg, rgba(79, 174, 155, 0.16), rgba(11, 27, 51, 0.6));
  border: 1px solid rgba(79, 174, 155, 0.3);
  border-radius: var(--ab-radius);
}

.page-about .ab-yunnan__title {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--yl-jade);
}

.page-about .ab-yunnan__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.82);
}

.page-about .ab-trust {
  background: var(--yl-ink);
}

.page-about .ab-trust__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .ab-trust__list {
  display: grid;
  gap: 2px;
  background: var(--ab-line-soft);
  border-radius: var(--ab-radius);
  overflow: hidden;
}

.page-about .ab-trust__item {
  padding: 22px 20px 24px;
  background: var(--yl-ink-2);
}

.page-about .ab-trust__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--yl-gold);
}

.page-about .ab-trust__title {
  margin: 0 0 10px;
  font-size: clamp(16px, 2.6vw, 19px);
  line-height: 1.45;
  font-weight: 700;
  color: var(--yl-paper);
}

.page-about .ab-trust__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.76);
}

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

.page-about .ab-cadence {
  background:
    linear-gradient(180deg, rgba(255, 122, 89, 0.05), transparent 26%),
    var(--yl-ink-2);
}

.page-about .ab-table__wrap {
  border: 1px solid var(--ab-line-soft);
  border-radius: var(--ab-radius);
  overflow-x: auto;
}

.page-about .ab-table__wrap .yl-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .ab-table__wrap thead th {
  padding: 14px 16px;
  text-align: left;
  font-family: var(--yl-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yl-gold);
  background: rgba(5, 10, 18, 0.5);
  border-bottom: 1px solid var(--ab-line);
  white-space: nowrap;
}

.page-about .ab-table__wrap tbody td {
  padding: 15px 16px;
  line-height: 1.75;
  color: rgba(247, 244, 237, 0.82);
  border-bottom: 1px solid var(--ab-line-soft);
  vertical-align: top;
}

.page-about .ab-table__wrap tbody tr:last-child td {
  border-bottom: none;
}

.page-about .ab-table__wrap tbody td:first-child {
  font-weight: 700;
  color: var(--yl-paper);
}

.page-about .ab-kpis {
  margin-top: clamp(24px, 4vw, 36px);
  gap: 14px;
}

.page-about .ab-kpi {
  padding: 20px 18px;
  background: rgba(5, 10, 18, 0.4);
  border: 1px solid var(--ab-line-soft);
  border-bottom: 2px solid var(--yl-coral);
  border-radius: var(--ab-radius);
}

.page-about .ab-kpi .yl-kpi__value {
  margin: 0 0 6px;
  font-family: var(--yl-mono);
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1;
  color: var(--yl-amber);
}

.page-about .ab-kpi .yl-kpi__label {
  margin: 0;
  font-size: 13px;
  color: var(--yl-warmgray);
}

.page-about .ab-acc__wrap {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  gap: 10px;
}

.page-about .ab-acc {
  background: rgba(11, 27, 51, 0.7);
  border: 1px solid var(--ab-line-soft);
  border-radius: var(--ab-radius);
}

.page-about .ab-acc .yl-acc__summary {
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--yl-paper);
  cursor: pointer;
}

.page-about .ab-acc .yl-acc__body {
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.78);
}

.page-about .ab-acc .yl-acc__body p {
  margin: 0;
}

.page-about .ab-cta {
  margin-top: clamp(34px, 6vw, 58px);
  padding: clamp(24px, 4vw, 38px);
  background: linear-gradient(120deg, rgba(214, 168, 75, 0.18), rgba(18, 40, 76, 0.9) 60%);
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
}

.page-about .ab-cta__text {
  margin: 0 0 20px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 244, 237, 0.86);
}

.page-about .ab-cta__actions {
  flex-wrap: wrap;
}

@media (min-width: 700px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-about .ab-history__figure {
    grid-column: 1 / -1;
  }

  .page-about .ab-toolbar {
    align-self: start;
  }

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

  .page-about .ab-node__dot {
    left: -41px;
  }

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

  .page-about .ab-trust__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-about .ab-trust__figure {
    position: sticky;
    top: calc(var(--yl-header-h) + 24px);
  }

  .page-about .ab-card {
    padding: 28px 26px 30px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-timeline {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
    border-left: none;
    padding-left: 0;
  }

  .page-about .ab-node {
    padding-left: 26px;
    border-left: 2px solid var(--ab-line);
  }

  .page-about .ab-node__dot {
    left: -7px;
  }
}
<<<END>>>