.page-about {
  --ab-gap: clamp(22px, 3.4vw, 44px);
  background: var(--paper);
  color: var(--graphite);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-about .ab-hero {
  position: relative;
  padding: clamp(22px, 4vw, 46px) 0 clamp(34px, 6vw, 74px);
  background:
    radial-gradient(120% 96% at 92% 4%, rgba(246, 192, 138, 0.62), transparent 58%),
    linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 78%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -140px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px dashed var(--line-strong);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .ab-hero__lead .xy-lede {
  max-width: 58ch;
  margin-top: 14px;
}

.page-about .ab-hero__card {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--xy-radius);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-paper);
}

.page-about .ab-hero__card::after {
  content: "";
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px dashed var(--line-paper);
  opacity: 0.75;
  pointer-events: none;
}

.page-about .ab-hero__cardtitle {
  margin: 0 0 16px;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--apricot-soft);
}

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

.page-about .ab-fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-paper);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s var(--xy-ease), color 0.25s var(--xy-ease);
}

.page-about .ab-hero__facts li:last-child .ab-fact {
  padding-bottom: 0;
  border-bottom: 0;
}

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

.page-about .ab-fact__num {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 800;
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .ab-fact__unit {
  margin-left: 3px;
  font-size: 0.5em;
  color: var(--apricot-soft);
}

.page-about .ab-fact__label {
  font-family: var(--font-ui);
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(251, 246, 238, 0.82);
}

/* ============ 区块骨架 ============ */
.page-about .ab-section {
  position: relative;
  padding: clamp(46px, 7vw, 90px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-section--paper {
  background: var(--paper-2);
}

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

.page-about .ab-section--ink::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 4px;
  background: linear-gradient(90deg, var(--apricot), var(--gold));
}

.page-about .ab-h2 {
  margin: 0 0 clamp(12px, 2vw, 18px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.58rem, 3.2vw, 2.35rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--ink);
}

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

.page-about .ab-summary {
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 3px solid var(--apricot);
  font-family: var(--font-ui);
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .ab-summary--light {
  border-left-color: var(--gold);
  color: rgba(251, 246, 238, 0.84);
}

.page-about .ab-eyebrow--light {
  color: var(--apricot-soft);
}

.page-about .ab-leadline {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .ab-leadline strong {
  color: var(--apricot-deep);
}

/* ============ 非对称双栏 ============ */
.page-about .ab-split {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .ab-split__aside .xy-card--stack {
  position: relative;
}

/* ============ 时间线 ============ */
.page-about .ab-timeline-figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--xy-radius);
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

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

.page-about .ab-timeline {
  position: relative;
  margin-top: clamp(30px, 5vw, 50px);
  padding-left: clamp(20px, 4vw, 34px);
  border-left: 2px solid var(--line-strong);
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 0;
  width: 2px;
  height: 34%;
  background: linear-gradient(180deg, var(--apricot), var(--gold));
}

.page-about .ab-tl__item {
  position: relative;
  padding-bottom: clamp(16px, 2.6vw, 24px);
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(20px, 4vw, 34px) - 7px);
  top: 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper-2);
  border: 3px solid var(--apricot);
}

.page-about .ab-tl__item[open]::before {
  background: var(--gold);
  border-color: var(--apricot-deep);
}

.page-about .ab-tl__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 6px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-about .ab-tl__sum:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
  border-radius: 4px;
}

.page-about .ab-tl__year {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 800;
  line-height: 1;
  color: var(--apricot);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tl__title {
  flex: 1 1 12ch;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .ab-tl__sum::after {
  content: "＋";
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-ui);
  font-weight: 700;
  color: var(--gold);
}

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

.page-about .ab-tl__body {
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .ab-tl__body p {
  margin: 0;
}

/* ============ 入库工序 ============ */
.page-about .ab-flowline {
  display: block;
  width: 100%;
  max-width: 720px;
  height: auto;
  margin: 0 auto clamp(14px, 2vw, 20px);
  color: var(--ink-2);
}

.page-about .ab-flow {
  display: grid;
  gap: clamp(14px, 2.4vw, 20px);
}

.page-about .ab-flow__step {
  position: relative;
  padding: clamp(20px, 3vw, 26px);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--xy-radius);
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s var(--xy-ease), box-shadow 0.3s var(--xy-ease), border-color 0.3s var(--xy-ease);
}

.page-about .ab-flow__step:hover,
.page-about .ab-flow__step:focus-within {
  transform: translateY(-4px);
  border-color: var(--apricot);
  box-shadow: var(--shadow-paper);
}

.page-about .ab-flow__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--apricot-soft);
  border: 1px solid var(--apricot);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--ink);
}

.page-about .ab-flow__title {
  margin: 0 0 10px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.16rem;
  color: var(--ink);
}

.page-about .ab-flow__text {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .ab-flow__meta {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-family: var(--font-ui);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-about .ab-flow-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--xy-radius);
  overflow: hidden;
  background: var(--paper-2);
}

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

/* ============ 团队 ============ */
.page-about .ab-team {
  display: grid;
  gap: clamp(14px, 2vw, 18px);
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-team__card {
  position: relative;
  padding: clamp(20px, 2.6vw, 26px) clamp(18px, 2.6vw, 24px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--xy-radius);
  box-shadow: var(--shadow-soft);
}

.page-about .ab-team__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(18px, 2.6vw, 24px);
  width: 36px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--apricot), var(--gold));
}

.page-about .ab-team__title {
  margin: 0 0 8px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--ink);
}

.page-about .ab-team__text {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .ab-team-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--xy-radius);
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

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

/* ============ 规模数据 ============ */
.page-about .ab-kpis {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  background: var(--line-paper);
  border: 1px solid var(--line-paper);
  border-radius: var(--xy-radius);
  overflow: hidden;
}

.page-about .ab-kpi {
  padding: clamp(22px, 3vw, 30px);
  background: var(--ink);
}

.page-about .ab-kpi__value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 5vw, 2.9rem);
  font-weight: 800;
  line-height: 1.05;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-kpi__unit {
  margin-left: 4px;
  font-size: 0.44em;
  font-weight: 700;
  color: var(--apricot-soft);
}

.page-about .ab-kpi__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(251, 246, 238, 0.8);
}

.page-about .ab-scale__note {
  max-width: 76ch;
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-size: 0.98rem;
  line-height: 1.95;
  color: rgba(251, 246, 238, 0.86);
}

.page-about .ab-scale__note a {
  color: var(--apricot-soft);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .ab-scale__note a:hover,
.page-about .ab-scale__note a:focus-visible {
  color: var(--gold);
}

/* ============ 合作生态 ============ */
.page-about .ab-eco {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-eco__card {
  position: relative;
  padding: clamp(20px, 2.8vw, 28px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 4px solid var(--moss);
  border-radius: var(--xy-radius);
}

.page-about .ab-eco__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  font-family: var(--font-ui);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--ink-2);
}

.page-about .ab-eco__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.16rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .ab-eco__text {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--graphite);
}

.page-about .ab-eco__note {
  max-width: 78ch;
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 0.98rem;
  line-height: 1.95;
  color: var(--ink-2);
}

.page-about .ab-eco__note a {
  color: var(--apricot-deep);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .ab-eco__note a:hover,
.page-about .ab-eco__note a:focus-visible {
  color: var(--ink);
}

/* ============ 结尾引导 ============ */
.page-about .ab-section--cta {
  padding: clamp(36px, 6vw, 72px) 0 clamp(46px, 7vw, 88px);
  border-bottom: 0;
}

.page-about .ab-cta {
  padding: clamp(26px, 4.5vw, 52px);
  border-radius: clamp(18px, 2.6vw, 26px);
  background:
    radial-gradient(120% 140% at 88% 0%, rgba(217, 169, 60, 0.36), transparent 62%),
    linear-gradient(135deg, var(--apricot), var(--apricot-deep));
  color: var(--paper);
  box-shadow: var(--shadow-paper);
}

.page-about .ab-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .ab-cta__text {
  max-width: 68ch;
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(251, 246, 238, 0.94);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-btn-outline {
  border-color: rgba(251, 246, 238, 0.7);
  color: var(--paper);
}

.page-about .ab-btn-outline:hover,
.page-about .ab-btn-outline:focus-visible {
  background: var(--paper);
  color: var(--apricot-deep);
  border-color: var(--paper);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .ab-kpis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }
  .page-about .ab-eco {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

@media (min-width: 960px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.85fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .ab-timeline {
    margin-top: clamp(34px, 4vw, 54px);
  }
}

@media (min-width: 1024px) {
  .page-about .ab-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-about .ab-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .page-about .ab-cta__actions .xy-btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-flow__step,
  .page-about .ab-fact {
    transition: none;
  }
  .page-about .ab-flow__step:hover,
  .page-about .ab-flow__step:focus-within {
    transform: none;
  }
}