.page-about {
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-top: clamp(20px, 4vw, 48px);
}
.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: -22% -12% auto -32%;
  height: 78%;
  background:
    radial-gradient(58% 58% at 26% 32%, rgba(217, 169, 75, .17), transparent 72%),
    radial-gradient(44% 44% at 84% 8%, rgba(60, 214, 197, .11), transparent 72%),
    radial-gradient(40% 40% at 62% 86%, rgba(255, 112, 87, .08), transparent 70%);
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 52px);
  align-items: center;
}

.page-about .ab-hero__title {
  font-family: var(--df-serif);
  font-size: clamp(36px, 8.4vw, 78px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--df-paper);
  margin: 14px 0 0;
}
.page-about .ab-hero__title em {
  font-style: normal;
  color: var(--df-gold-bright);
  background-image: linear-gradient(90deg, rgba(217, 169, 75, .40), rgba(60, 214, 197, .22));
  background-repeat: no-repeat;
  background-size: 100% .24em;
  background-position: 0 88%;
  padding: 0 .04em;
}

.page-about .ab-hero__lead {
  margin-top: clamp(16px, 2.6vw, 24px);
  max-width: 56ch;
  color: var(--df-text);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-about .ab-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--df-radius);
  overflow: hidden;
  aspect-ratio: 7 / 9;
  max-height: 70vh;
  border: 1px solid var(--df-line);
  background: linear-gradient(150deg, var(--df-ink-soft), var(--df-moss));
}
.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .ab-hero__figure::after {
  content: "";
  position: absolute;
  inset: 40% 0 0 0;
  background: linear-gradient(180deg, transparent, rgba(11, 13, 16, .88));
  pointer-events: none;
}
.page-about .ab-hero__figure .df-media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 16px 20px 18px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--df-text-dim);
  background: linear-gradient(0deg, rgba(11, 13, 16, .92), transparent);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    gap: clamp(36px, 5vw, 68px);
    align-items: end;
  }
  .page-about .ab-hero__figure {
    transform: translateY(-6px);
  }
}

/* ---------- 窄栏 + 宽正文 ---------- */
.page-about .ab-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-about .ab-rail__body .df-section__title {
  margin-top: 0;
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-about .ab-rail__body .df-prose p {
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.92;
  color: var(--df-text);
  margin: 0 0 1.05em;
}
.page-about .ab-rail__body .df-prose p:last-child {
  margin-bottom: 0;
}

.page-about .ab-quote {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 16px 0 16px 22px;
  border-left: 2px solid var(--df-neon);
  font-family: var(--df-serif);
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.7;
  color: var(--df-gold-bright);
}

@media (min-width: 900px) {
  .page-about .ab-rail {
    grid-template-columns: minmax(0, .32fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 68px);
  }
  .page-about .ab-rail__aside {
    position: sticky;
    top: calc(var(--df-header-h) + 32px);
  }
}

/* ---------- 数据条 ---------- */
.page-about .ab-stats__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--df-line);
  border-bottom: 1px solid var(--df-line);
  background: linear-gradient(180deg, rgba(18, 22, 27, .78), rgba(11, 13, 16, .5));
  border-radius: var(--df-radius);
  overflow: hidden;
}

.page-about .ab-stats__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3.2vw, 30px) clamp(16px, 2.6vw, 28px);
  border-left: 1px solid var(--df-line-soft);
  border-top: 1px solid var(--df-line-soft);
}
.page-about .ab-stats__item:nth-child(-n + 2) {
  border-top: 0;
}
.page-about .ab-stats__item:nth-child(odd) {
  border-left: 0;
}

.page-about .ab-stats__num {
  font-family: var(--df-mono);
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--df-gold-bright);
}

.page-about .ab-stats__label {
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--df-text-dim);
}

@media (min-width: 820px) {
  .page-about .ab-stats__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-stats__item {
    border-top: 0;
  }
  .page-about .ab-stats__item:nth-child(odd) {
    border-left: 1px solid var(--df-line-soft);
  }
  .page-about .ab-stats__item:first-child {
    border-left: 0;
  }
}

/* ---------- 三块服务内容 ---------- */
.page-about .ab-pillars__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 22px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .ab-pillar {
  position: relative;
  padding: clamp(24px, 3.4vw, 38px) clamp(20px, 3vw, 34px);
  border-radius: var(--df-radius);
  border: 1px solid var(--df-line-soft);
  background: linear-gradient(158deg, rgba(18, 22, 27, .94), rgba(11, 13, 16, .96));
  overflow: hidden;
}
.page-about .ab-pillar::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ab-accent, var(--df-gold)), transparent 78%);
}
.page-about .ab-pillar--gold { --ab-accent: var(--df-gold); }
.page-about .ab-pillar--neon { --ab-accent: var(--df-neon); }
.page-about .ab-pillar--coral { --ab-accent: var(--df-coral); }

.page-about .ab-pillar__num {
  position: absolute;
  top: 10px;
  right: 18px;
  font-family: var(--df-mono);
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1;
  color: rgba(245, 241, 232, .06);
  pointer-events: none;
}

.page-about .ab-pillar__title {
  position: relative;
  font-family: var(--df-serif);
  font-size: clamp(19px, 2.5vw, 25px);
  font-weight: 600;
  line-height: 1.42;
  color: var(--df-paper);
  margin: 0 0 14px;
  max-width: 22ch;
}

.page-about .ab-pillar p {
  position: relative;
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--df-text);
}

.page-about .ab-pillar__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

@media (min-width: 860px) {
  .page-about .ab-pillars__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: clamp(18px, 2.4vw, 26px);
  }
  .page-about .ab-pillar:nth-child(1) { grid-column: span 5; }
  .page-about .ab-pillar:nth-child(2) { grid-column: span 7; }
  .page-about .ab-pillar:nth-child(3) { grid-column: span 12; }
  .page-about .ab-pillar:nth-child(3) .ab-pillar__title { max-width: 34ch; }
  .page-about .ab-pillar:nth-child(3) p { max-width: 74ch; }
}

/* ---------- 横幅图片 ---------- */
.page-about .ab-banner__figure {
  position: relative;
  margin: 0;
  border-radius: clamp(18px, 3vw, 28px);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--df-line-soft);
  background: linear-gradient(120deg, var(--df-ink-soft), var(--df-moss));
}
.page-about .ab-banner__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .ab-banner__figure::after {
  content: "";
  position: absolute;
  inset: 32% 0 0 0;
  background: linear-gradient(180deg, transparent, rgba(11, 13, 16, .94));
  pointer-events: none;
}
.page-about .ab-banner__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: clamp(20px, 4vw, 40px);
  max-width: 68ch;
  font-size: clamp(14px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--df-text);
}
.page-about .ab-banner__caption .df-tag {
  margin-right: 8px;
}

@media (min-width: 780px) {
  .page-about .ab-banner__figure {
    aspect-ratio: 2 / 1;
  }
}

/* ---------- 版本历程 ---------- */
.page-about .ab-road__list {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  position: relative;
}
.page-about .ab-road__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, var(--df-gold), var(--df-neon) 62%, transparent);
}

.page-about .ab-road__item {
  position: relative;
  padding-left: 34px;
  padding-bottom: clamp(28px, 4vw, 42px);
}
.page-about .ab-road__item:last-child {
  padding-bottom: 0;
}
.page-about .ab-road__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--df-ink);
  border: 2px solid var(--df-gold);
}

.page-about .ab-road__ver {
  display: inline-block;
  margin: 0 0 8px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--df-line);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--df-gold-bright);
  background: rgba(217, 169, 75, .08);
}

.page-about .ab-road__title {
  font-family: var(--df-serif);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 600;
  line-height: 1.48;
  color: var(--df-paper);
  margin: 0 0 10px;
}

.page-about .ab-road__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--df-text);
  max-width: 66ch;
}

@media (min-width: 820px) {
  .page-about .ab-road__list::before {
    left: 6px;
  }
  .page-about .ab-road__item {
    padding-left: 48px;
  }
  .page-about .ab-road__item::before {
    width: 13px;
    height: 13px;
  }
}

/* ---------- 行动区 ---------- */
.page-about .ab-cta__panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  padding: clamp(28px, 5vw, 58px);
  border-radius: clamp(18px, 3vw, 30px);
  border: 1px solid var(--df-line);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(217, 169, 75, .18), transparent 62%),
    radial-gradient(100% 120% at 100% 100%, rgba(255, 112, 87, .14), transparent 60%),
    linear-gradient(150deg, var(--df-ink-soft), var(--df-ink));
  overflow: hidden;
}
.page-about .ab-cta__panel::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px dashed rgba(60, 214, 197, .28);
  pointer-events: none;
}

.page-about .ab-cta__title {
  font-family: var(--df-serif);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 600;
  line-height: 1.34;
  color: var(--df-paper);
  margin: 12px 0 14px;
  max-width: 24ch;
}

.page-about .ab-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--df-text);
  max-width: 62ch;
}

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

@media (min-width: 840px) {
  .page-about .ab-cta__panel {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .8fr);
    align-items: center;
  }
  .page-about .ab-cta__actions {
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-hero__figure {
    transform: none;
  }
}
</main>