.page-about {
  background: var(--kes-blue);
  color: var(--kes-text);
}

.page-about .ab-chapter,
.page-about .ab-scale,
.page-about .ab-timeline__item {
  scroll-margin-top: calc(var(--kes-header-h) + 18px);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 4px 0 clamp(46px, 7vw, 84px);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(24, 35, 63, 0.95) 0%, rgba(11, 18, 36, 0) 58%),
    var(--kes-blue);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: min(680px, 78vw);
  height: 520px;
  background: linear-gradient(205deg, rgba(255, 106, 42, 0.2) 0%, rgba(69, 224, 196, 0.08) 46%, rgba(11, 18, 36, 0) 74%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 72%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 106, 42, 0.55), rgba(69, 224, 196, 0.3) 46%, rgba(231, 214, 182, 0.12));
}

.page-about .ab-hero > .kes-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .kes-breadcrumb {
  padding: 16px 0 26px;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: center;
}

.page-about .ab-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  margin: 0 0 18px;
  padding: 5px 12px;
  border: 1px solid var(--kes-line-strong);
  border-radius: var(--kes-radius);
  font-family: var(--kes-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--kes-teal);
}

.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-family: var(--kes-font-sans);
  font-size: clamp(31px, 5.4vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--kes-paper);
  text-wrap: balance;
}

.page-about .ab-hero__lede {
  margin: 0 0 26px;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--kes-text);
}

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

.page-about .ab-hero__figure {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--kes-line-strong);
  border-radius: var(--kes-radius);
  background: var(--kes-indigo);
  box-shadow: 0 24px 46px -30px rgba(0, 0, 0, 0.95);
}

.page-about .ab-hero__figure img {
  width: 100%;
  border-radius: 2px;
}

.page-about .ab-hero__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--kes-text-dim);
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-chapters {
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .ab-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: clamp(34px, 5vw, 56px) 0;
  border-top: 1px solid var(--kes-line);
}

.page-about .ab-chapter:first-child {
  border-top: 0;
}

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

.page-about .ab-chapter__num {
  font-family: var(--kes-font-serif);
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--kes-orange);
}

.page-about .ab-chapter__label {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--kes-text-dim);
}

.page-about .ab-chapter__title {
  margin: 0 0 16px;
  font-family: var(--kes-font-sans);
  font-size: clamp(23px, 3.2vw, 33px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--kes-paper);
}

.page-about .ab-lead {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: clamp(16px, 1.7vw, 17.5px);
  line-height: 1.85;
  color: var(--kes-text);
}

.page-about .ab-text {
  margin: 0 0 15px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--kes-text);
}

.page-about .ab-text--dim {
  color: var(--kes-text-dim);
}

.page-about .ab-link {
  color: var(--kes-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 224, 196, 0.42);
  transition: color var(--kes-t) var(--kes-ease), border-color var(--kes-t) var(--kes-ease);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--kes-orange);
  border-bottom-color: var(--kes-orange);
}

/* ---------- 起点三卡 ---------- */
.page-about .ab-points {
  list-style: none;
  margin: 22px 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .ab-points__item {
  padding: 16px 16px 18px;
  border: 1px solid var(--kes-edge);
  border-radius: var(--kes-radius);
  background: var(--kes-paper);
  box-shadow: 0 1px 0 var(--kes-edge), 0 14px 26px -22px rgba(0, 0, 0, 0.9);
  transition: transform var(--kes-t) var(--kes-ease), box-shadow var(--kes-t) var(--kes-ease);
}

.page-about .ab-points__item:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 0 var(--kes-edge), 0 20px 30px -22px rgba(0, 0, 0, 0.95);
}

.page-about .ab-points__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--kes-ink);
}

.page-about .ab-points__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--kes-ink-soft);
}

/* ---------- 年份跳转 ---------- */
.page-about .ab-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
}

.page-about .ab-years__link {
  padding: 5px 11px;
  border: 1px solid var(--kes-line-strong);
  border-radius: var(--kes-radius);
  font-family: var(--kes-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--kes-teal);
  text-decoration: none;
  transition: color var(--kes-t) var(--kes-ease), background var(--kes-t) var(--kes-ease), border-color var(--kes-t) var(--kes-ease);
}

.page-about .ab-years__link:hover,
.page-about .ab-years__link:focus-visible {
  color: var(--kes-blue);
  background: var(--kes-teal);
  border-color: var(--kes-teal);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(255, 106, 42, 0.6), rgba(231, 214, 182, 0.1));
}

.page-about .ab-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-left: 26px;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 9px;
  height: 9px;
  box-sizing: border-box;
  border: 2px solid var(--kes-orange);
  border-radius: 50%;
  background: var(--kes-blue);
  transition: background var(--kes-t) var(--kes-ease), box-shadow var(--kes-t) var(--kes-ease);
}

.page-about .ab-timeline__item:hover::before {
  background: var(--kes-orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 42, 0.16);
}

.page-about .ab-timeline__year {
  margin: 0;
  font-family: var(--kes-font-sans);
  font-size: clamp(28px, 4.4vw, 40px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--kes-orange);
}

.page-about .ab-timeline__card {
  padding: 16px 18px 16px;
  border: 1px solid var(--kes-edge);
  border-radius: var(--kes-radius);
  background: var(--kes-paper);
  box-shadow: 0 1px 0 var(--kes-edge), 0 16px 30px -26px rgba(0, 0, 0, 0.95);
  transition: transform var(--kes-t) var(--kes-ease), box-shadow var(--kes-t) var(--kes-ease);
}

.page-about .ab-timeline__card:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 0 var(--kes-edge), 0 22px 34px -26px rgba(0, 0, 0, 1);
}

.page-about .ab-timeline__kicker {
  display: inline-block;
  margin-bottom: 9px;
  padding: 2px 8px;
  border: 1px solid var(--kes-edge);
  border-radius: 2px;
  background: rgba(231, 214, 182, 0.72);
  font-family: var(--kes-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--kes-ink);
}

.page-about .ab-timeline__title {
  margin: 0 0 8px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--kes-ink);
}

.page-about .ab-timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--kes-ink-soft);
}

.page-about .ab-timeline__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-top: 12px;
  padding-top: 11px;
  border-top: 1px dashed rgba(74, 56, 47, 0.3);
  font-size: 12px;
  color: var(--kes-ink-soft);
}

.page-about .ab-timeline__v {
  padding: 1px 6px;
  border: 1px solid rgba(74, 56, 47, 0.32);
  border-radius: 2px;
  font-family: var(--kes-font-mono);
  font-size: 11.5px;
  color: var(--kes-ink);
}

/* ---------- 版本条 ---------- */
.page-about .ab-versions {
  margin-top: 26px;
  padding: 15px 18px;
  border: 1px solid var(--kes-line-strong);
  border-left: 3px solid var(--kes-teal);
  border-radius: var(--kes-radius);
  background: rgba(24, 35, 63, 0.55);
}

.page-about .ab-versions__lead {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--kes-text-dim);
}

.page-about .ab-versions__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .ab-versions__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--kes-text);
}

.page-about .ab-versions__code {
  font-family: var(--kes-font-mono);
  font-size: 13.5px;
  color: var(--kes-teal);
}

/* ---------- 数据条 ---------- */
.page-about .ab-scale {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 5.5vw, 62px) 0;
  background: var(--kes-indigo);
  border-top: 1px solid var(--kes-line-strong);
  border-bottom: 1px solid var(--kes-line-strong);
}

.page-about .ab-scale::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(255, 106, 42, 0) 0%, rgba(255, 106, 42, 0.1) 42%, rgba(255, 106, 42, 0) 100%),
    radial-gradient(rgba(244, 233, 208, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 4px 4px;
  pointer-events: none;
}

.page-about .ab-scale > .kes-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-scale__head {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.page-about .ab-scale__num {
  font-family: var(--kes-font-serif);
  font-size: 20px;
  line-height: 1;
  color: var(--kes-orange);
}

.page-about .ab-scale__title {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 33px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--kes-paper);
}

.page-about .ab-scale__note {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--kes-text-dim);
}

.page-about .ab-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--kes-line);
  border-radius: var(--kes-radius);
  background: var(--kes-line);
  overflow: hidden;
}

.page-about .ab-stats__item {
  display: grid;
  align-content: start;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--kes-blue);
  transition: background var(--kes-t) var(--kes-ease), box-shadow var(--kes-t) var(--kes-ease);
}

.page-about .ab-stats__item:hover {
  background: #0F1830;
  box-shadow: inset 0 0 0 1px rgba(255, 106, 42, 0.35);
}

.page-about .ab-stats__value {
  font-family: var(--kes-font-mono);
  font-size: clamp(25px, 4vw, 33px);
  font-weight: 600;
  line-height: 1;
  color: var(--kes-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stats__unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--kes-text-dim);
}

.page-about .ab-stats__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--kes-text);
}

.page-about .ab-scale__figure {
  margin: 24px 0 0;
  padding: 8px;
  border: 1px solid var(--kes-line);
  border-radius: var(--kes-radius);
  background: var(--kes-blue);
}

.page-about .ab-scale__figure img {
  width: 100%;
}

.page-about .ab-scale__cap {
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--kes-text-dim);
}

/* ---------- 团队三段 ---------- */
.page-about .ab-roles {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .ab-roles__item {
  padding: 15px 16px 16px;
  border: 1px solid var(--kes-line);
  border-left: 3px solid var(--kes-orange);
  border-radius: var(--kes-radius);
  background: rgba(24, 35, 63, 0.62);
  transition: border-color var(--kes-t) var(--kes-ease), background var(--kes-t) var(--kes-ease);
}

.page-about .ab-roles__item:hover {
  border-left-color: var(--kes-teal);
  background: rgba(24, 35, 63, 0.9);
}

.page-about .ab-roles__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--kes-text);
}

.page-about .ab-figure {
  display: grid;
  gap: 10px;
  margin: 0 0 22px;
}

.page-about .ab-figure img {
  width: 100%;
  border: 1px solid var(--kes-line-strong);
  border-radius: var(--kes-radius);
  background: var(--kes-indigo);
}

.page-about .ab-figure__cap {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--kes-text-dim);
}

/* ---------- 结尾行动 ---------- */
.page-about .ab-cta {
  padding: clamp(38px, 6vw, 68px) 0;
  border-top: 1px solid var(--kes-line-strong);
  background: linear-gradient(160deg, var(--kes-indigo) 0%, var(--kes-blue) 72%);
}

.page-about .ab-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .ab-cta__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--kes-paper);
}

.page-about .ab-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--kes-text);
}

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

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-about .ab-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .ab-timeline__item {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: start;
    gap: 24px;
    padding-left: 32px;
  }

  .page-about .ab-timeline__item::before {
    top: 16px;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 880px) {
  .page-about .ab-hero {
    padding-top: 8px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: 48px;
  }

  .page-about .ab-hero__figure {
    transform: rotate(-1.4deg);
  }
}

@media (min-width: 920px) {
  .page-about .ab-chapter {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    padding: clamp(46px, 6vw, 74px) 0;
  }

  .page-about .ab-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    position: sticky;
    top: calc(var(--kes-header-h) + 24px);
    align-self: start;
  }

  .page-about .ab-chapter__rail::after {
    content: "";
    display: block;
    width: 1px;
    height: 60px;
    margin-top: 6px;
    background: linear-gradient(to bottom, var(--kes-orange), rgba(255, 106, 42, 0));
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-points__item:hover,
  .page-about .ab-timeline__card:hover {
    transform: none;
  }

  .page-about .ab-hero__figure {
    transform: none;
  }

  .page-about .ab-points__item,
  .page-about .ab-timeline__card,
  .page-about .ab-timeline__item::before,
  .page-about .ab-stats__item,
  .page-about .ab-roles__item {
    transition-duration: 0.001ms;
  }
}

/* ---------- 打印 ---------- */
@media print {
  .page-about {
    background: #fff;
    color: #111;
  }

  .page-about .ab-hero::before,
  .page-about .ab-scale::before,
  .page-about .ab-cta,
  .page-about .ab-hero__actions,
  .page-about .ab-years {
    display: none;
  }

  .page-about .ab-hero,
  .page-about .ab-scale {
    background: #fff;
    border-color: #bbb;
  }

  .page-about .ab-hero__title,
  .page-about .ab-chapter__title,
  .page-about .ab-scale__title,
  .page-about .ab-cta__title {
    color: #111;
  }

  .page-about .ab-hero__lede,
  .page-about .ab-text,
  .page-about .ab-lead,
  .page-about .ab-scale__note {
    color: #222;
  }

  .page-about .ab-chapter {
    break-inside: avoid;
  }
}
<<<END>>>