.page-about {
  --ab-line: rgba(20, 32, 27, .14);
  --ab-line-soft: rgba(20, 32, 27, .08);
  --ab-shadow: 0 22px 48px -32px rgba(20, 32, 27, .55);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .ab-wrap {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.page-about .ab-crumb .breadcrumb {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--green-mid);
}

.page-about .ab-crumb .breadcrumb a {
  color: var(--green-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
}

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

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(20px, 3vw, 32px);
}

.page-about .ab-hero .eyebrow {
  display: block;
  margin-bottom: clamp(14px, 2vw, 22px);
  color: var(--green-mid);
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 82px);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: 0 0 clamp(24px, 4vw, 44px);
  color: var(--ink);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .ab-hero__lead p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.78;
  max-width: 62ch;
  color: rgba(20, 32, 27, .84);
}

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

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

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

.page-about .ab-facts__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--green-mid);
}

.page-about .ab-facts__value {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 600;
  color: var(--green-deep);
  line-height: 1;
}

.page-about .ab-facts__unit {
  font-size: 13px;
  margin-left: 3px;
  color: var(--green-mid);
}

.page-about .ab-hero__figure {
  margin: 0 auto clamp(20px, 3vw, 32px);
  max-width: var(--page-max);
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1600 / 700;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-inline: var(--gutter);
  width: calc(100% - var(--gutter) * 2);
}

.page-about .ab-hero__figure .figure__caption {
  margin: 12px var(--gutter) 0;
}

/* ---------- 章节跳转 ---------- */
.page-about .ab-jump {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-about .ab-jump::-webkit-scrollbar {
  display: none;
}

.page-about .ab-jump .pill {
  flex: 0 0 auto;
  text-decoration: none;
}

.page-about .ab-jump .pill:hover {
  background: var(--gold);
  color: var(--black);
}

/* ---------- 通用章节 ---------- */
.page-about .ab-section {
  padding-block: clamp(48px, 7vw, 104px);
}

.page-about .ab-section h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -.015em;
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  color: var(--ink);
}

.page-about .ab-section .eyebrow {
  display: block;
  margin-bottom: 12px;
  color: var(--green-mid);
}

/* ---------- 品牌主张 ---------- */
.page-about .ab-thesis {
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-thesis__body p {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.8;
  max-width: 66ch;
  color: rgba(20, 32, 27, .86);
}

.page-about .ab-thesis__body strong {
  color: var(--green-deep);
  font-weight: 700;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 1px;
}

.page-about .ab-numerals {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--ab-line);
  display: grid;
  gap: 22px 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .ab-numerals li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-numerals__num {
  font-family: var(--font-numeric);
  font-size: clamp(30px, 5vw, 54px);
  font-weight: 600;
  line-height: 1;
  color: var(--green-deep);
  letter-spacing: -.02em;
}

.page-about .ab-numerals__plus {
  font-size: .5em;
  color: var(--gold);
  margin-left: 2px;
}

.page-about .ab-numerals__desc {
  font-size: 13px;
  letter-spacing: .03em;
  color: rgba(20, 32, 27, .68);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  background: var(--black);
  color: var(--paper);
  overflow: hidden;
}

.page-about .ab-timeline .ab-contour {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .07;
  pointer-events: none;
}

.page-about .ab-timeline__inner {
  position: relative;
}

.page-about .ab-timeline h2 {
  color: var(--paper);
}

.page-about .ab-timeline .eyebrow {
  color: var(--gold);
}

.page-about .ab-timeline__lead {
  margin: 0 0 clamp(24px, 3.5vw, 40px);
  font-size: 15px;
  line-height: 1.75;
  max-width: 54ch;
  color: rgba(244, 238, 223, .72);
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0 0 18px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  border-top: 1px solid var(--hair-invert);
}

.page-about .ab-track__item {
  flex: 0 0 78%;
  max-width: 320px;
  scroll-snap-align: start;
  padding: 20px 18px 22px;
  border-radius: var(--radius-md);
  background: rgba(244, 238, 223, .06);
  border: 1px solid var(--hair-invert);
  position: relative;
}

.page-about .ab-track__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 18px;
  width: 34px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gold);
}

.page-about .ab-track__year {
  display: inline-block;
  font-family: var(--font-numeric);
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--gold);
  margin-bottom: 12px;
}

.page-about .ab-track__item h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .ab-track__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 238, 223, .74);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__head {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .ab-team__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  max-width: 56ch;
  color: rgba(20, 32, 27, .8);
}

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

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1200 / 800;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .ab-team__figure .figure__caption {
  margin-top: 10px;
}

.page-about .ab-team__grid {
  display: grid;
  gap: 14px;
}

.page-about .ab-card {
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--ab-line-soft);
  box-shadow: var(--ab-shadow);
  overflow: hidden;
}

.page-about .ab-card:nth-child(2) {
  background: var(--field);
}

.page-about .ab-card:nth-child(3) {
  background: var(--mist);
}

.page-about .ab-card summary {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "role num"
    "hint num";
  align-items: center;
  gap: 4px 12px;
  padding: 18px 18px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-card summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-card__role {
  grid-area: role;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ab-card__num {
  grid-area: num;
  font-family: var(--font-numeric);
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 600;
  line-height: 1;
  color: var(--green-deep);
}

.page-about .ab-card__hint {
  grid-area: hint;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--green-mid);
}

.page-about .ab-card__hint::after {
  content: " ▾";
}

.page-about .ab-card[open] .ab-card__hint::after {
  content: " ▴";
}

.page-about .ab-card__body {
  padding: 0 18px 20px;
  border-top: 1px solid var(--ab-line-soft);
  margin-top: 2px;
}

.page-about .ab-card__body p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(20, 32, 27, .82);
}

.page-about .ab-card summary:focus-visible {
  outline: 2px solid var(--green-deep);
  outline-offset: -3px;
}

/* ---------- 内容标准与合作 ---------- */
.page-about .ab-standards {
  background: linear-gradient(180deg, rgba(169, 199, 176, .28), rgba(244, 238, 223, 0) 62%);
}

.page-about .ab-standards__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

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

.page-about .ab-rules li {
  padding: 18px 0;
  border-top: 1px solid var(--ab-line);
}

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

.page-about .ab-rules__k {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--green-deep);
  background: var(--gold);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  margin-bottom: 10px;
}

.page-about .ab-rules p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(20, 32, 27, .84);
  max-width: 58ch;
}

.page-about .ab-partners {
  display: grid;
  gap: 16px;
}

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

.page-about .ab-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1000 / 700;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .ab-partners__figure .figure__caption {
  margin-top: 10px;
}

.page-about .ab-partners__panel {
  border-radius: var(--radius-lg);
  background: var(--green-deep);
  color: var(--paper);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .ab-partners__panel h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--paper);
}

.page-about .ab-partners__list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-partners__list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--hair-invert);
}

.page-about .ab-partners__list dt {
  font-size: 13px;
  color: rgba(244, 238, 223, .74);
}

.page-about .ab-partners__list dd {
  margin: 0;
  font-family: var(--font-numeric);
  font-size: 20px;
  font-weight: 600;
  color: var(--gold);
}

.page-about .ab-partners__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: rgba(244, 238, 223, .7);
}

/* ---------- 服务地区与站点身份 ---------- */
.page-about .ab-identity {
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-about .ab-identity__panel {
  border-radius: var(--radius-lg);
  background: var(--green-deep);
  color: var(--paper);
  padding: clamp(26px, 4vw, 52px);
  position: relative;
  overflow: hidden;
}

.page-about .ab-identity__panel::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 1px solid var(--hair-invert);
  pointer-events: none;
}

.page-about .ab-identity__eyebrow {
  color: var(--gold);
  display: block;
  margin-bottom: 12px;
}

.page-about .ab-identity__panel h2 {
  color: var(--paper);
  margin-bottom: clamp(18px, 2.6vw, 26px);
  font-size: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-identity__cols {
  display: grid;
  gap: 16px clamp(24px, 4vw, 48px);
  position: relative;
  z-index: 1;
}

.page-about .ab-identity__cols p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 238, 223, .82);
  max-width: 52ch;
}

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

.page-about .ab-identity__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 32px);
  position: relative;
  z-index: 1;
}

.page-about .ab-identity__links .btn--ghost {
  border-color: rgba(244, 238, 223, .4);
  color: var(--paper);
}

.page-about .ab-identity__links .btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-numerals {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-track__item {
    flex: 0 0 300px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-thesis {
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.5fr);
    gap: clamp(32px, 5vw, 80px);
    align-items: start;
  }

  .page-about .ab-thesis__head h2 {
    margin-bottom: 0;
  }

  .page-about .ab-thesis .ab-numerals {
    grid-column: 1 / -1;
  }

  .page-about .ab-team__head {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

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

  .page-about .ab-card:nth-child(1) {
    grid-column: span 2;
  }

  .page-about .ab-card:nth-child(4) {
    grid-column: span 2;
  }

  .page-about .ab-standards__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }

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

  .page-about .ab-track__item {
    flex: 1 1 0;
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-card__hint::after {
    content: "";
  }
}
<<<END>>>