.page-about {
  --ab-gold-soft: rgba(201, 162, 74, 0.14);
  --ab-gold-rule: rgba(201, 162, 74, 0.34);
  --ab-ink-rule: rgba(230, 201, 126, 0.22);
}

.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

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

.page-about .ab-kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .section--sand .ab-kicker,
.page-about .section--paper .ab-kicker {
  color: var(--bronze);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-block: clamp(24px, 5vw, 44px) clamp(44px, 8vw, 84px);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 4%, var(--ab-gold-rule) 50%, transparent 96%);
}

.page-about .ab-hero .breadcrumbs {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .ab-hero .breadcrumbs a {
  color: var(--on-dark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .ab-hero .breadcrumbs a:hover,
.page-about .ab-hero .breadcrumbs a:focus-visible {
  color: var(--gold-light);
  border-bottom-color: var(--ab-gold-rule);
}

.page-about .ab-hero .breadcrumbs [aria-current="page"] {
  color: var(--gold-light);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .ab-hero h1 {
  margin: 14px 0 18px;
  max-width: 22em;
  font-size: clamp(27px, 5.4vw, 52px);
  line-height: 1.2;
  color: var(--on-dark-strong);
}

.page-about .ab-hero__lede {
  max-width: 54ch;
  margin: 0;
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .ab-hero__aside {
  display: flex;
  justify-content: flex-start;
}

.page-about .ab-seal {
  width: 116px;
  height: 116px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--ab-gold-rule);
  box-shadow: inset 0 0 0 5px rgba(201, 162, 74, 0.08), inset 0 0 0 6px rgba(201, 162, 74, 0.18);
  color: var(--gold-light);
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: 0.08em;
  text-align: center;
  transform: rotate(-4deg);
  transition: box-shadow 0.25s ease, color 0.25s ease;
}

.page-about .ab-seal:hover {
  box-shadow: inset 0 0 0 5px rgba(201, 162, 74, 0.16), inset 0 0 0 6px rgba(201, 162, 74, 0.34);
  color: #fff;
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  background: var(--ab-ink-rule);
  border: 1px solid var(--ab-ink-rule);
}

.page-about .ab-hero__fact {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  background: var(--ink);
  padding: 14px 16px 16px;
}

.page-about .ab-hero__fact dt {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-hero__fact dd {
  margin: 0;
  font-size: clamp(17px, 2.3vw, 23px);
  letter-spacing: 0.02em;
  color: var(--gold-light);
}

/* ---------- 品牌由来 ---------- */
.page-about .ab-origin {
  padding-block: clamp(44px, 8vw, 84px);
}

.page-about .ab-origin__grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-origin h2 {
  margin: 12px 0 16px;
  font-size: clamp(21px, 3.2vw, 33px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-origin__text > p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ab-pledge {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-light);
}

.page-about .ab-pledge > li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  column-gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-light);
  transition: background 0.2s ease;
}

.page-about .ab-pledge > li:hover {
  background: rgba(201, 162, 74, 0.07);
}

.page-about .ab-pledge .index-num {
  padding-top: 2px;
}

.page-about .ab-pledge h3 {
  margin: 0 0 4px;
  font-size: 16px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-about .ab-pledge p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

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

.page-about .ab-origin__media .media {
  border: 1px solid var(--ab-gold-rule);
}

.page-about .ab-origin__media figcaption {
  margin-top: 10px;
}

/* ---------- 发展历程 ---------- */
.page-about .ab-timeline {
  padding-block: clamp(44px, 8vw, 84px);
}

.page-about .ab-timeline h2 {
  margin: 12px 0 14px;
  font-size: clamp(21px, 3.2vw, 33px);
  line-height: 1.4;
  color: var(--on-dark-strong);
}

.page-about .ab-timeline__intro {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .ab-timeline__band {
  margin: 28px 0 10px;
  border: 1px solid var(--ab-ink-rule);
  overflow: hidden;
}

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

.page-about .ab-tl {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--ab-gold-rule), rgba(201, 162, 74, 0.06));
}

.page-about .ab-tl__item {
  position: relative;
  padding: 16px 0 16px 30px;
  border-bottom: 1px solid rgba(230, 201, 126, 0.1);
  outline: none;
}

.page-about .ab-tl__item:last-child {
  border-bottom: 0;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--ab-gold-rule);
  background: var(--ink-2);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-tl__item:hover::before,
.page-about .ab-tl__item:focus::before,
.page-about .ab-tl__item:focus-within::before {
  background: var(--gold-light);
  box-shadow: 0 0 0 5px rgba(201, 162, 74, 0.16);
}

.page-about .ab-tl__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .ab-tl__year {
  padding: 1px 6px;
  font-size: 12px;
  color: var(--gold-light);
  border: 1px solid var(--ab-gold-rule);
  border-radius: 2px;
}

.page-about .ab-tl__title {
  margin: 8px 0 6px;
  font-size: clamp(16.5px, 2.2vw, 21px);
  line-height: 1.45;
  letter-spacing: 0.03em;
  color: var(--on-dark-strong);
}

.page-about .ab-tl__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-about .ab-tl__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  border-left: 2px solid transparent;
  padding-left: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(244, 239, 228, 0.62);
  transition: max-height 0.32s ease, opacity 0.24s ease, margin-top 0.24s ease, padding-left 0.24s ease, border-color 0.24s ease;
}

.page-about .ab-tl__item:hover .ab-tl__more,
.page-about .ab-tl__item:focus .ab-tl__more,
.page-about .ab-tl__item:focus-within .ab-tl__more {
  max-height: 180px;
  opacity: 1;
  margin-top: 10px;
  padding-left: 12px;
  border-left-color: var(--ab-gold-rule);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding-block: clamp(44px, 8vw, 84px);
}

.page-about .ab-team h2 {
  margin: 12px 0 14px;
  font-size: clamp(21px, 3.2vw, 33px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-team__intro {
  max-width: 64ch;
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .ab-team__cell {
  background: var(--paper);
  padding: 20px 18px 22px;
  transition: background 0.2s ease;
}

.page-about .ab-team__cell:hover {
  background: #fff;
}

.page-about .ab-team__count {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 34px);
  line-height: 1;
  color: var(--gold);
}

.page-about .ab-team__unit {
  margin-left: 4px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-team__cell h3 {
  margin: 10px 0 6px;
  font-size: 16px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-about .ab-team__cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .ab-bar {
  display: flex;
  height: 10px;
  margin: 22px 0 10px;
  background: var(--line-light);
  overflow: hidden;
}

.page-about .ab-bar span {
  display: block;
  height: 100%;
}

.page-about .ab-bar span:nth-child(1) {
  width: 39.1%;
  background: var(--gold);
}

.page-about .ab-bar span:nth-child(2) {
  width: 19.6%;
  background: var(--gold-light);
}

.page-about .ab-bar span:nth-child(3) {
  width: 26.1%;
  background: var(--bronze);
}

.page-about .ab-bar span:nth-child(4) {
  width: 15.2%;
  background: var(--mist);
}

.page-about .ab-bar__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--graphite);
}

.page-about .ab-bar__legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-about .ab-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
}

.page-about .ab-dot--1 { background: var(--gold); }
.page-about .ab-dot--2 { background: var(--gold-light); }
.page-about .ab-dot--3 { background: var(--bronze); }
.page-about .ab-dot--4 { background: var(--mist); }

.page-about .ab-team__note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--gold);
  background: rgba(201, 162, 74, 0.1);
}

.page-about .ab-team__note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .ab-team__media {
  margin: 26px 0 0;
}

.page-about .ab-team__media .media {
  border: 1px solid var(--line-light);
}

.page-about .ab-team__media figcaption {
  margin-top: 10px;
}

/* ---------- 原则与生态 ---------- */
.page-about .ab-eco {
  padding-block: clamp(44px, 8vw, 84px);
}

.page-about .ab-eco h2 {
  margin: 12px 0 0;
  font-size: clamp(21px, 3.2vw, 33px);
  line-height: 1.4;
  color: var(--on-dark-strong);
}

.page-about .ab-eco__grid {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

.page-about .ab-principles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-principles li {
  padding: 16px 0;
  border-top: 1px solid var(--ab-ink-rule);
}

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

.page-about .ab-principles h3 {
  margin: 0 0 5px;
  font-size: 16px;
  letter-spacing: 0.05em;
  color: var(--on-dark-strong);
}

.page-about .ab-principles p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--on-dark);
}

.page-about .ab-seals {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-seals li {
  padding: 14px 16px 16px;
  border: 1px solid var(--ab-ink-rule);
  background: rgba(201, 162, 74, 0.05);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .ab-seals li:hover {
  border-color: var(--ab-gold-rule);
  background: rgba(201, 162, 74, 0.12);
}

.page-about .ab-seals__mark {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-about .ab-seals h3 {
  margin: 0 0 5px;
  font-size: 15.5px;
  letter-spacing: 0.04em;
  color: var(--gold-light);
}

.page-about .ab-seals p:not(.ab-seals__mark) {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--on-dark);
}

.page-about .ab-eco__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  background: var(--ab-ink-rule);
  border: 1px solid var(--ab-ink-rule);
}

.page-about .ab-eco__stat {
  background: var(--ink-2);
  padding: 14px 16px 16px;
}

.page-about .ab-eco__stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ab-eco__stat dd {
  margin: 6px 0 0;
  font-size: clamp(16px, 2.2vw, 21px);
  color: var(--gold-light);
}

/* ---------- 内容中心 ---------- */
.page-about .ab-hub {
  padding-block: clamp(44px, 8vw, 84px);
}

.page-about .ab-hub h2 {
  margin: 12px 0 14px;
  font-size: clamp(21px, 3.2vw, 33px);
  line-height: 1.4;
  color: var(--ink);
}

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

.page-about .ab-hub__grid {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--line-light);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.page-about .ab-hub__col {
  background: var(--sand);
  padding: 22px 0 24px;
}

.page-about .ab-hub__num {
  margin: 0 0 8px;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--bronze);
}

.page-about .ab-hub__col h3 {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-about .ab-hub__col p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .ab-hub__link {
  display: inline-block;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-hub__link:hover,
.page-about .ab-hub__link:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-about .ab-hub__foot {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .ab-hub__foot p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

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

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  padding-block: clamp(40px, 7vw, 72px);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .ab-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.4;
  color: var(--on-dark-strong);
}

.page-about .ab-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 42px;
  }

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

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

  .page-about .ab-hub__col {
    padding: 24px 22px 26px;
  }
}

@media (min-width: 800px) {
  .page-about .ab-tl__item {
    padding: 20px 0 20px 56px;
  }

  .page-about .ab-tl__item::before {
    top: 28px;
  }

  .page-about .ab-hub__foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }

  .page-about .ab-hub__actions {
    justify-content: flex-end;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
  }

  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 190px;
    align-items: end;
    gap: 44px;
  }

  .page-about .ab-hero__aside {
    justify-content: flex-end;
    padding-bottom: 6px;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .ab-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .ab-team__media {
    margin-top: 30px;
  }

  .page-about .ab-team__media .media {
    max-height: 420px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>