.page-about {
  --ab-rail-w: 92px;
  --ab-ink-soft: rgba(242, 245, 243, 0.76);
  --ab-ink-dim: rgba(242, 245, 243, 0.6);
  --ab-cell: rgba(28, 43, 36, 0.62);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 5vw, 60px) clamp(48px, 8vw, 108px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: 82%;
  height: 132%;
  background: radial-gradient(closest-side, rgba(240, 78, 35, 0.22), rgba(240, 78, 35, 0) 72%);
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 52px);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 14px;
  color: var(--moss);
}

.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 7.2vw, 72px);
  font-weight: 250;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--board);
}

.page-about .ab-hero__lede {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 34em;
  color: var(--ab-ink-soft);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

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

.page-about .ab-hero__fig .nt-media {
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 26px 64px rgba(0, 0, 0, 0.46);
}

.page-about .ab-hero__fig img,
.page-about .ab-review__media img,
.page-about .ab-ver__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-about .ab-hero__cap {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

/* ---------- 编号章节骨架 ---------- */
.page-about .ab-chapter {
  padding-block: clamp(44px, 7vw, 112px);
  border-top: 1px solid var(--line);
}

.page-about .ab-chapter__grid {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .ab-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .ab-chapter__num {
  font-family: var(--font-data);
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(199, 194, 180, 0.32);
  transition: color 0.35s ease, text-shadow 0.35s ease;
}

.page-about .ab-chapter[data-active="true"] .ab-chapter__num {
  color: var(--lava);
  text-shadow: 0 0 26px rgba(240, 78, 35, 0.45);
}

.page-about .ab-chapter__kicker {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--moss);
}

.page-about .ab-chapter__title {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-size: clamp(23px, 3.7vw, 40px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--board);
}

/* ---------- 正文 ---------- */
.page-about .ab-p {
  max-width: 40em;
  margin: 0 0 1.05em;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .ab-p:last-child {
  margin-bottom: 0;
}

.page-about .ab-quote {
  max-width: 38em;
  margin: clamp(22px, 3vw, 34px) 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--lava);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 300;
  line-height: 1.55;
  color: var(--board);
}

/* ---------- 数据流程步骤 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-steps__item {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(28, 43, 36, 0.92), rgba(16, 32, 26, 0.9));
  overflow: hidden;
}

.page-about .ab-steps__item::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clay), rgba(196, 105, 74, 0) 74%);
}

.page-about .ab-steps__num {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .ab-steps__title {
  margin: 10px 0 8px;
  font-size: clamp(16px, 1.9vw, 18px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--board);
}

.page-about .ab-steps__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ab-ink-dim);
}

/* ---------- 复核图文 ---------- */
.page-about .ab-review {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: clamp(18px, 3vw, 30px);
}

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

/* ---------- 团队方格 ---------- */
.page-about .ab-team {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-team__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ab-cell);
}

.page-about .ab-team__cell:nth-child(1),
.page-about .ab-team__cell:nth-child(6) {
  background: linear-gradient(150deg, rgba(240, 78, 35, 0.18), rgba(28, 43, 36, 0.72) 64%);
  border-color: rgba(240, 78, 35, 0.28);
}

.page-about .ab-team__tag {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-about .ab-team__role {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--board);
}

.page-about .ab-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ab-ink-dim);
}

.page-about .ab-team__aside {
  margin-top: clamp(24px, 4vw, 34px);
}

.page-about .ab-team__aside > .nt-index {
  margin: 0 0 12px;
  color: var(--moss);
}

/* ---------- 版本时间轴 ---------- */
.page-about .ab-ver__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(20px, 3vw, 32px);
}

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

.page-about .ab-ver .nt-timeline__meta {
  font-family: var(--font-data);
  letter-spacing: 0.06em;
  color: var(--clay);
}

.page-about .ab-ver .nt-timeline__title {
  color: var(--board);
}

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

.page-about .ab-ver__media .nt-media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-partners__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(16, 32, 26, 0.72);
}

.page-about .ab-partners__type {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .ab-partners__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ab-ink-soft);
}

/* ---------- 覆盖数字 ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(22px, 3vw, 34px) 0;
}

.page-about .ab-stats__item {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(170deg, rgba(28, 43, 36, 0.88), rgba(11, 20, 16, 0.62));
}

.page-about .ab-stats__num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(26px, 4.2vw, 38px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--lava);
  text-shadow: 0 0 26px rgba(240, 78, 35, 0.3);
}

.page-about .ab-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* ---------- 收束 CTA ---------- */
.page-about .ab-chapter--last {
  padding-block: clamp(36px, 5vw, 72px) clamp(56px, 8vw, 118px);
}

.page-about .ab-cta {
  display: grid;
  gap: 20px;
  padding: clamp(26px, 4vw, 52px);
  border: 1px solid rgba(240, 78, 35, 0.28);
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, rgba(240, 78, 35, 0.2), rgba(28, 43, 36, 0.92) 56%, rgba(16, 32, 26, 0.96));
}

.page-about .ab-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--board);
}

.page-about .ab-cta__text {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ab-ink-soft);
}

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

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-about .ab-chapter__grid {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    column-gap: clamp(20px, 3.4vw, 52px);
  }

  .page-about .ab-chapter__rail {
    position: sticky;
    top: 96px;
    align-self: start;
    flex-direction: column;
    gap: 10px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: end;
    column-gap: clamp(32px, 5vw, 72px);
  }

  .page-about .ab-review {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .ab-ver__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.76fr);
    align-items: start;
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 680px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .ab-partners__item {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
  }

  .page-about .ab-partners__type {
    flex: none;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .ab-team__cell:nth-child(1) { grid-column: span 4; }
  .page-about .ab-team__cell:nth-child(2) { grid-column: span 2; }
  .page-about .ab-team__cell:nth-child(3) { grid-column: span 2; }
  .page-about .ab-team__cell:nth-child(4) { grid-column: span 4; }
  .page-about .ab-team__cell:nth-child(5) { grid-column: span 3; }
  .page-about .ab-team__cell:nth-child(6) { grid-column: span 3; }
}

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-chapter__num {
    transition: none;
  }
}
<<<END>>>