.page-about {
  --ab-pad: clamp(52px, 8vw, 118px);
  --ab-gap: clamp(18px, 2.6vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding-block: clamp(22px, 4vw, 52px) clamp(44px, 6vw, 88px);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: var(--ab-gap);
}

@media (min-width: 960px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 6.3fr) minmax(0, 5.7fr);
    align-items: end;
  }
}

.page-about .ab-hero-figure {
  margin: 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 76px), calc(100% - 76px) 100%, 0 100%);
}

.page-about .ab-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
}

.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .ab-kicker-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-soft);
  flex: none;
}

.page-about .ab-hero-copy h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 6.2vw, 80px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .ab-lede {
  max-width: 46ch;
  margin: 0 0 28px;
  font-size: var(--fs-3);
  line-height: 1.85;
  color: #c9d3e1;
}

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

.page-about .ab-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 34px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .ab-hero-stats dt {
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.page-about .ab-hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.8vw, 28px);
  line-height: 1.2;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-hero-stats .num {
  color: var(--cyan);
}

/* ---------- 通用章节 ---------- */
.page-about .ab-section {
  padding-block: var(--ab-pad);
  border-top: 1px solid var(--line);
}

.page-about .ab-section--last {
  padding-bottom: clamp(64px, 9vw, 130px);
}

/* ---------- 01 品牌起点 ---------- */
.page-about .ab-origin {
  display: grid;
  gap: var(--ab-gap);
}

@media (min-width: 900px) {
  .page-about .ab-origin {
    grid-template-columns: minmax(0, 7.2fr) minmax(0, 4.4fr);
    align-items: start;
  }
}

.page-about .ab-origin-copy p {
  font-size: var(--fs-3);
  line-height: 1.9;
  color: #c9d3e1;
}

.page-about .ab-origin-note {
  padding: clamp(20px, 3vw, 30px);
}

.page-about .ab-note-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: var(--fs-4);
  line-height: 1.25;
  color: var(--white);
}

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

.page-about .ab-origin-note li {
  padding-left: 15px;
  border-left: 2px solid var(--orange);
  font-size: var(--fs-2);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 02 业务线 ---------- */
.page-about .ab-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-line {
  display: grid;
  gap: 14px;
  padding-block: clamp(24px, 3.4vw, 38px);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 860px) {
  .page-about .ab-line {
    grid-template-columns: 62px minmax(0, 6.4fr) minmax(0, 4.4fr);
    column-gap: clamp(20px, 3vw, 44px);
    align-items: start;
  }
}

.page-about .ab-line-num {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .ab-line h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.5vw, 30px);
  line-height: 1.2;
  color: var(--white);
}

.page-about .ab-line-body p {
  margin: 0;
  font-size: var(--fs-3);
  line-height: 1.82;
  color: #bfcadb;
}

.page-about .ab-line .ab-scene {
  margin: 0;
  padding: 14px 16px;
  background: var(--glass);
  border-left: 2px solid var(--cyan);
  font-size: var(--fs-2);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .ab-inline-cta {
  margin: clamp(26px, 3vw, 40px) 0 0;
}

/* ---------- 03 团队 ---------- */
.page-about .ab-team-layout {
  display: grid;
  gap: var(--ab-gap);
}

@media (min-width: 980px) {
  .page-about .ab-team-layout {
    grid-template-columns: minmax(0, 4.5fr) minmax(0, 7.5fr);
    align-items: start;
  }
}

.page-about .ab-team-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .ab-team-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9);
}

.page-about .ab-team {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 660px) {
  .page-about .ab-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .ab-team-card {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel);
  transition: background var(--dur) var(--ease);
}

.page-about .ab-team-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-team-card:hover,
.page-about .ab-team-card:focus-within {
  background: #17233a;
}

.page-about .ab-team-card:hover::before,
.page-about .ab-team-card:focus-within::before {
  transform: scaleY(1);
}

.page-about .ab-team-glyph {
  display: block;
  width: 32px;
  height: 32px;
  background: linear-gradient(140deg, var(--cyan-soft), rgba(43, 245, 208, 0) 68%);
  border: 1px solid var(--line);
  clip-path: polygon(50% 0, 100% 27%, 100% 73%, 50% 100%, 0 73%, 0 27%);
}

.page-about .ab-team-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-4);
  line-height: 1.25;
  color: var(--white);
}

.page-about .ab-team-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: 0.03em;
  color: var(--cyan);
}

.page-about .ab-team-card > p:last-child {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 04 时间轴 ---------- */
.page-about .ab-tl {
  display: grid;
  gap: var(--ab-gap);
}

@media (min-width: 900px) {
  .page-about .ab-tl {
    grid-template-columns: 92px minmax(0, 1fr);
    column-gap: clamp(22px, 3.6vw, 52px);
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--bar-h) + 26px);
    align-self: start;
  }
}

.page-about .ab-index-title {
  margin: 0 0 12px;
  font-size: var(--fs-1);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .ab-index ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (min-width: 900px) {
  .page-about .ab-index ul {
    flex-direction: column;
  }
}

.page-about .ab-index a {
  display: inline-block;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  color: var(--muted);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-index a:hover,
.page-about .ab-index a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .ab-timeline {
  position: relative;
  padding-left: 44px;
}

.page-about .ab-track {
  position: absolute;
  left: 2px;
  top: 0;
  width: 40px;
  height: 100%;
  pointer-events: none;
}

.page-about .ab-stage {
  position: relative;
  padding-block: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--line);
}

.page-about .ab-stage:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: 15px;
  top: clamp(34px, 4.6vw, 52px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-soft);
}

.page-about .ab-stage-year {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(46px, 8.5vw, 96px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: rgba(242, 245, 247, 0.08);
  -webkit-text-stroke: 1.5px rgba(242, 245, 247, 0.24);
  transition: -webkit-text-stroke-color var(--dur) var(--ease);
}

.page-about .ab-stage:hover .ab-stage-year {
  -webkit-text-stroke-color: rgba(43, 245, 208, 0.6);
}

.page-about .ab-stage-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.4vw, 28px);
  line-height: 1.25;
  color: var(--white);
}

.page-about .ab-stage p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-3);
  line-height: 1.88;
  color: #bfcadb;
}

/* ---------- 05 合作生态 ---------- */
.page-about .ab-partner {
  display: grid;
  gap: var(--ab-gap);
}

@media (min-width: 900px) {
  .page-about .ab-partner {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 5.6fr);
    align-items: start;
  }
}

.page-about .ab-partner-copy > .prose {
  margin: 0 0 clamp(24px, 3vw, 36px);
  font-size: var(--fs-3);
  line-height: 1.9;
  color: #c9d3e1;
}

.page-about .ab-partner-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-partner-facts li {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .ab-partner-facts .num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-fact-label {
  font-size: var(--fs-1);
  line-height: 1.6;
  color: var(--muted);
}

.page-about .ab-partner-figure {
  position: relative;
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 56px), calc(100% - 56px) 100%, 0 100%);
}

.page-about .ab-partner-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.04);
}

/* ---------- 06 荣誉徽章 ---------- */
.page-about .ab-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}

@media (min-width: 760px) {
  .page-about .ab-badges {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-badge {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(22px, 3vw, 32px);
  background: var(--navy);
  border: 1px solid var(--clay);
  position: relative;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-badge:hover {
  transform: translateY(-6px);
  border-color: var(--orange);
}

.page-about .ab-badge-shape {
  display: block;
  width: 46px;
  height: 46px;
  border: 1px solid var(--clay);
  background:
    repeating-linear-gradient(135deg, rgba(181, 69, 43, 0.22) 0 3px, transparent 3px 8px);
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
}

.page-about .ab-badge-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-badge h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-4);
  line-height: 1.3;
  color: var(--white);
}

.page-about .ab-badge p:last-child {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 07 接下来的计划 ---------- */
.page-about .ab-next {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 800px) {
  .page-about .ab-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-flow: column;
    border-left: 1px solid var(--line);
    border-right: 1px solid var(--line);
    gap: 0;
  }

  .page-about .ab-next li {
    border-left: 1px solid var(--line);
  }

  .page-about .ab-next li:first-child {
    border-left: 0;
  }
}

.page-about .ab-next li {
  padding: clamp(22px, 3vw, 32px);
  background: var(--navy);
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .ab-next h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-4);
  line-height: 1.28;
  color: var(--white);
}

.page-about .ab-next p {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.82;
  color: var(--muted);
}

.page-about .ab-closing {
  margin-top: clamp(34px, 4.4vw, 56px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--clay);
  display: grid;
  gap: 18px;
}

@media (min-width: 760px) {
  .page-about .ab-closing {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

.page-about .ab-closing-text {
  margin: 0;
  max-width: 42ch;
  font-size: var(--fs-3);
  line-height: 1.8;
  color: #c9d3e1;
}

/* ---------- 焦点与降级 ---------- */
.page-about a:focus-visible,
.page-about .ab-team-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-team-card,
  .page-about .ab-team-card::before,
  .page-about .ab-badge,
  .page-about .ab-stage-year {
    transition: none;
  }

  .page-about .ab-badge:hover {
    transform: none;
  }
}

/* ---------- 窄屏收束 ---------- */
@media (max-width: 560px) {
  .page-about .ab-hero-stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-about .ab-hero-stats > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
  }

  .page-about .ab-hero-stats dt {
    margin-bottom: 0;
  }

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

  .page-about .ab-stage::before {
    left: 10px;
  }

  .page-about .ab-hero-figure,
  .page-about .ab-partner-figure {
    clip-path: none;
  }
}
<<<END>>>