.page-about {
  --ab-gutter: clamp(18px, 4vw, 48px);
  --ab-line: rgba(169, 193, 212, .18);
  --ab-line-soft: rgba(169, 193, 212, .10);
  --ab-ink-line: rgba(7, 20, 33, .18);
  background: var(--ink-900);
  color: var(--mist);
  overflow-x: hidden;
}

.page-about .ab-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about .breadcrumb {
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-about .breadcrumb a {
  color: var(--frost);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(20px, 3.5vw, 44px) 0 clamp(40px, 6vw, 88px);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .ab-hero__text {
  position: relative;
  min-width: 0;
}

.page-about .ab-hero__text::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 4px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--gold-line), transparent 62%);
  display: none;
}

.page-about .ab-kicker {
  margin: 0;
  font-size: .78rem;
  letter-spacing: .22em;
  color: var(--gold);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .ab-kicker .num {
  font-family: var(--font-num);
  font-size: 1rem;
  letter-spacing: .06em;
  color: var(--gold);
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 2px;
}

.page-about .ab-hero h1 {
  margin: clamp(14px, 2vw, 22px) 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.15rem, 7vw, 4.7rem);
  line-height: 1.06;
  letter-spacing: .045em;
  color: var(--paper);
  max-width: 16ch;
}

.page-about .ab-hero__lead {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.85;
  color: var(--frost);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .ab-hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-hero__meta dt {
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--steel);
}

.page-about .ab-hero__meta dd {
  margin: 8px 0 0;
  font-size: .9rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .ab-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-about .ab-hero__figure figcaption {
  margin-top: 12px;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-size: .74rem;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .ab-hero__figure img,
.page-about .ab-team__figure img,
.page-about .ab-stop--figure img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 章节通用 ---------- */
.page-about .ab-chapter {
  padding: clamp(46px, 7vw, 96px) 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: .76rem;
  letter-spacing: .3em;
  color: var(--gold);
}

.page-about .ab-chapter h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.4vw, 2.5rem);
  line-height: 1.26;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-about .ab-inline {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 1px;
}

.page-about .ab-inline:hover {
  color: var(--magenta);
  border-bottom-color: var(--magenta-line);
}

/* ---------- 品牌起点 ---------- */
.page-about .ab-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .ab-origin__side {
  min-width: 0;
}

.page-about .ab-coords {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-coords li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ab-line-soft);
  font-size: .84rem;
}

.page-about .ab-coords__k {
  color: var(--steel);
  letter-spacing: .12em;
  flex: 0 0 auto;
}

.page-about .ab-coords__v {
  font-family: var(--font-num);
  letter-spacing: .04em;
  color: var(--mist);
  text-align: right;
}

.page-about .ab-origin__body {
  min-width: 0;
}

.page-about .ab-origin__body p {
  margin: 0 0 1.1em;
  max-width: 60ch;
  font-size: clamp(1rem, 1.15vw, 1.05rem);
  line-height: 1.88;
  color: var(--frost);
}

.page-about .ab-origin__body p:first-child {
  font-size: clamp(1.04rem, 1.5vw, 1.18rem);
  color: var(--mist);
}

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

/* ---------- 熟客优先（浅色反差章节） ---------- */
.page-about .ab-savvy {
  background: var(--mist);
  border-top-color: transparent;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-savvy h2 {
  color: var(--ink-900);
}

.page-about .ab-savvy__lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 56ch;
  font-size: clamp(.98rem, 1.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--ink-900);
  opacity: .82;
}

.page-about .ab-rules {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-about .ab-rule {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: clamp(12px, 2vw, 30px);
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--ab-ink-line);
}

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

.page-about .ab-rule__no {
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-about .ab-rule h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(1.02rem, 1.6vw, 1.2rem);
  font-weight: 700;
  letter-spacing: .045em;
  color: var(--ink-900);
}

.page-about .ab-rule p {
  margin: 0;
  max-width: 58ch;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--ink-900);
  opacity: .76;
}

/* ---------- 发展历程横向带 ---------- */
.page-about .ab-history__lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 52ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .ab-rail {
  margin-top: clamp(26px, 4vw, 44px);
  overflow-x: auto;
  overflow-y: hidden;
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
  scroll-snap-type: x proximity;
  max-width: 100%;
}

.page-about .ab-rail:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: -1px;
}

.page-about .ab-rail::-webkit-scrollbar {
  height: 4px;
}

.page-about .ab-rail::-webkit-scrollbar-track {
  background: transparent;
}

.page-about .ab-rail::-webkit-scrollbar-thumb {
  background: var(--gold-line);
}

.page-about .ab-rail__track {
  list-style: none;
  margin: 0;
  padding: 0 var(--ab-gutter);
  display: flex;
  min-width: max-content;
}

.page-about .ab-stop {
  position: relative;
  width: min(74vw, 268px);
  padding: clamp(22px, 3vw, 34px) clamp(16px, 2vw, 24px) clamp(26px, 3.6vw, 40px);
  border-left: 1px solid var(--ab-line-soft);
  scroll-snap-align: start;
}

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

.page-about .ab-stop::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--gold);
}

.page-about .ab-stop__year {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.5rem, 8vw, 4.2rem);
  line-height: .88;
  letter-spacing: .02em;
  color: var(--gold);
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 10px;
}

.page-about .ab-stop h3 {
  margin: 14px 0 8px;
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-stop p {
  margin: 0;
  font-size: .85rem;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .ab-stop--current::before {
  background: var(--magenta);
}

.page-about .ab-stop--current .ab-stop__year {
  color: var(--magenta);
  border-bottom-color: var(--magenta-line);
}

.page-about .ab-stop--figure {
  width: min(78vw, 320px);
  padding-right: 0;
}

.page-about .ab-stop--figure figure {
  margin: 0;
}

.page-about .ab-stop--figure figcaption {
  margin-top: 10px;
  font-size: .74rem;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--steel);
}

/* ---------- 运营团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .ab-team__body {
  min-width: 0;
}

.page-about .ab-team__body p {
  margin: 0 0 1.05em;
  max-width: 58ch;
  font-size: .97rem;
  line-height: 1.85;
  color: var(--frost);
}

.page-about .ab-team__body h2 + p {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .ab-team__cards {
  display: grid;
  gap: 18px;
  margin: clamp(24px, 3vw, 34px) 0 0;
}

.page-about .ab-card {
  border-top: 2px solid var(--gold);
  padding-top: 14px;
}

.page-about .ab-card dt {
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 4.4vw, 2.5rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .ab-card dt span {
  font-family: var(--font-body);
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--steel);
  margin-left: 6px;
}

.page-about .ab-card dd {
  margin: 10px 0 0;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--frost);
}

.page-about .ab-team__figure {
  margin: 0;
  min-width: 0;
}

.page-about .ab-team__figure figcaption {
  margin-top: 12px;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-size: .74rem;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 本地连接 ---------- */
.page-about .ab-local__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .ab-local__body {
  min-width: 0;
}

.page-about .ab-local__body p {
  margin: 0 0 1.05em;
  max-width: 58ch;
  font-size: .97rem;
  line-height: 1.85;
  color: var(--frost);
}

.page-about .ab-local__body h2 + p {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .ab-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(8px, 1.6vw, 16px);
  padding-bottom: 5px;
  font-size: .88rem;
  letter-spacing: .08em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
}

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

.page-about .ab-local__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ab-line);
  align-self: start;
}

.page-about .ab-local__stats li {
  display: flex;
  align-items: baseline;
  gap: clamp(14px, 2vw, 24px);
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--ab-line-soft);
  font-size: .9rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .ab-local__n {
  flex: 0 0 auto;
  min-width: 2.6em;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 4.4vw, 2.6rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold);
}

/* ---------- 桌面排布 ---------- */
@media (min-width: 620px) {
  .page-about .ab-team__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__text::before {
    display: block;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(40px, 6vw, 88px);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-local__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 6vw, 80px);
  }

  .page-about .ab-stop {
    width: 280px;
  }

  .page-about .ab-stop--figure {
    width: 340px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-rail__track {
    padding-left: max(var(--ab-gutter), calc((100vw - 1240px) / 2));
  }
}
<<<PAGE_CSS_END>>>