.page-about {
  --ab-body-width: 66ch;
  --ab-aside-width: 268px;
  background: var(--ink-900);
  color: var(--text-soft);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(18px, 3.6vw, 30px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(58% 44% at 82% 0%, rgba(64, 224, 208, .10), transparent 72%),
    radial-gradient(52% 40% at 4% 96%, rgba(255, 106, 42, .08), transparent 74%);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 28px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 52px);
  line-height: 0.94;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .ab-hero__lead {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .ab-hero__sub {
  margin: 14px 0 0;
  max-width: 46ch;
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */
.page-about .ab-photo {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .02), 0 14px 30px -22px rgba(0, 0, 0, .9);
}

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

.page-about .ab-photo--hero { aspect-ratio: 16 / 9; }
.page-about .ab-photo--43 { aspect-ratio: 4 / 3; }
.page-about .ab-photo--32 { aspect-ratio: 3 / 2; }

.page-about .ab-photo .media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--text-soft);
  background: rgba(5, 10, 22, .82);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.page-about .ab-photo--inset { margin: clamp(20px, 3.4vw, 30px) 0 0; }

/* ---------- 首屏数据条 ---------- */
.page-about .ab-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 16px;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .ab-figure {
  padding: 14px 0 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-figure__num {
  display: block;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .ab-figure:nth-child(1) .ab-figure__num { color: var(--orange); }
.page-about .ab-figure:nth-child(2) .ab-figure__num { color: var(--white); }
.page-about .ab-figure:nth-child(4) .ab-figure__num { color: var(--gold); }

.page-about .ab-figure__label {
  display: block;
  margin: 4px 0 12px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-chapter {
  padding: clamp(34px, 6.4vw, 84px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 3vw, 24px);
}

.page-about .ab-chapter__side {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .ab-chapter__num {
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .ab-chapter__vertical {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .ab-chapter__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.24;
  color: var(--white);
}

.page-about .ab-chapter__lead {
  margin: 14px 0 0;
  max-width: var(--ab-body-width);
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-chapter__body .prose {
  max-width: var(--ab-body-width);
  margin-top: 16px;
  color: var(--text-soft);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .ab-chapter__body .prose p { margin: 0 0 14px; }
.page-about .ab-chapter__body .prose p:last-child { margin-bottom: 0; }

/* ---------- 边栏 ---------- */
.page-about .ab-chapter__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .ab-note {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--ink-800);
}

.page-about .ab-note__num {
  display: block;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.05;
  color: var(--cyan-soft);
}

.page-about .ab-note__text {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.62;
  color: var(--mist);
}

.page-about .ab-quote {
  margin: 0;
  padding: 18px 16px 16px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
}

.page-about .ab-quote p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--white);
}

.page-about .ab-quote__label {
  display: inline-block;
  padding: 3px 10px 3px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-900);
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-about .ab-aside__note {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.68;
  color: var(--mist);
}

/* ---------- 岗位卡 ---------- */
.page-about .ab-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(20px, 3.4vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-role {
  padding: 16px 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .ab-role__key {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .ab-role__title {
  margin: 8px 0 0;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-role__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  margin: clamp(20px, 3.6vw, 32px) 0 0;
  padding: 0 0 0 24px;
  list-style: none;
  border-left: 1px solid var(--line-strong);
}

.page-about .ab-node {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--line-strong);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-node--key::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 196, 107, .14);
}

.page-about .ab-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .ab-node:hover::before { border-color: var(--cyan); }

.page-about .ab-node__year {
  display: block;
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--white);
}

.page-about .ab-node--key .ab-node__year { color: var(--gold); }

.page-about .ab-node__title {
  margin: 6px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(16px, 2.2vw, 19px);
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-node__text {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .ab-node__pop {
  display: none;
}

/* ---------- 色卡 ---------- */
.page-about .ab-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 10px;
  margin: clamp(20px, 3.4vw, 28px) 0 clamp(20px, 3.4vw, 26px);
  padding: 0;
  list-style: none;
}

.page-about .ab-swatch {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 10px 10px 12px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-swatch:hover,
.page-about .ab-swatch:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  outline: none;
}

.page-about .ab-swatch:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .ab-swatch__chip {
  display: block;
  height: 44px;
  border: 1px solid var(--line-strong);
}

.page-about .ab-swatch--ink900 .ab-swatch__chip { background: #050A16; }
.page-about .ab-swatch--ink800 .ab-swatch__chip { background: #0B1730; }
.page-about .ab-swatch--line .ab-swatch__chip { background: #1B3152; }
.page-about .ab-swatch--white .ab-swatch__chip { background: #F4F8FF; }
.page-about .ab-swatch--orange .ab-swatch__chip { background: #FF6A2A; }
.page-about .ab-swatch--cyan .ab-swatch__chip { background: #40E0D0; }
.page-about .ab-swatch--gold .ab-swatch__chip { background: #F2C46B; }
.page-about .ab-swatch--state .ab-swatch__chip {
  background: linear-gradient(90deg, #58D68D 0 50%, #FF5A6E 50% 100%);
}

.page-about .ab-swatch__name {
  font-family: var(--font-heading);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-swatch__use {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .ab-swatch__ratio {
  font-size: 12px;
  color: var(--cyan);
  transition: color var(--dur) var(--ease);
}

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

/* ---------- 结尾 ---------- */
.page-about .ab-cta {
  padding: clamp(36px, 6vw, 72px) 0 clamp(40px, 7vw, 84px);
  background:
    radial-gradient(60% 60% at 90% 10%, rgba(64, 224, 208, .10), transparent 72%),
    var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
  align-items: end;
}

.page-about .ab-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.04;
  color: var(--white);
}

.page-about .ab-cta__text {
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .ab-figures { grid-template-columns: repeat(4, minmax(0, 1fr)); }

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

  .page-about .ab-chapter__side {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .ab-chapter__vertical {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .26em;
  }

  .page-about .ab-timeline { padding-left: 28px; }

  .page-about .ab-node::before { left: -32px; }

  .page-about .ab-node {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    column-gap: 18px;
  }

  .page-about .ab-node__year { padding-top: 2px; }

  .page-about .ab-node__title { margin-top: 0; }

  .page-about .ab-node__pop {
    display: block;
    position: absolute;
    left: 90px;
    top: 100%;
    z-index: 4;
    width: max-content;
    max-width: 340px;
    margin: 8px 0 0;
    padding: 9px 12px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    line-height: 1.6;
    color: var(--text-soft);
    background: var(--ink-700);
    border: 1px solid var(--line-strong);
    border-left: 2px solid var(--cyan);
    box-shadow: 0 12px 24px -18px rgba(0, 0, 0, .95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }

  .page-about .ab-node:hover .ab-node__pop,
  .page-about .ab-node:focus-visible .ab-node__pop,
  .page-about .ab-node:focus-within .ab-node__pop {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(26px, 4vw, 48px);
  }

  .page-about .ab-hero__title { font-size: clamp(48px, 5.4vw, 72px); }

  .page-about .ab-chapter__grid {
    grid-template-columns: 56px minmax(0, 1fr);
    column-gap: clamp(18px, 3vw, 32px);
  }

  .page-about .ab-chapter__side { padding-top: 6px; }

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

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

@media (min-width: 1080px) {
  .page-about .ab-chapter__grid {
    grid-template-columns: 76px minmax(0, 1fr) var(--ab-aside-width);
    column-gap: clamp(24px, 3.2vw, 44px);
  }

  .page-about .ab-chapter__grid--solo {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .page-about .ab-photo--hero { aspect-ratio: 16 / 9; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-role,
  .page-about .ab-swatch,
  .page-about .ab-node__pop {
    transition: none;
  }

  .page-about .ab-role:hover,
  .page-about .ab-swatch:hover,
  .page-about .ab-swatch:focus-visible {
    transform: none;
  }
}
<<<END>>>