.page-about {
  --ab-hair: rgba(23, 32, 38, .14);
  --ab-hair-dark: rgba(251, 248, 241, .16);
  --ab-tick: rgba(201, 154, 74, .55);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
}

.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--rights);
}

.page-about .ab-kicker--dark {
  color: var(--cases);
}

.page-about .ab-h2 {
  margin: 8px 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.4vw, 2.55rem);
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--ink);
}

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

.page-about .ab-h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.005em;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: calc(var(--header-h) + 20px) 0 56px;
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(47, 125, 109, .32), transparent 62%),
    radial-gradient(90% 80% at 6% 96%, rgba(201, 154, 74, .22), transparent 60%),
    var(--navy);
  color: var(--paper-white);
  border-bottom-left-radius: var(--radius-l);
  border-bottom-right-radius: var(--radius-l);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, var(--ab-hair-dark) 1px, transparent 1px),
    linear-gradient(0deg, var(--ab-hair-dark) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .5;
  pointer-events: none;
}

.page-about .ab-hero__wrap {
  position: relative;
  z-index: 1;
}

.page-about .ab-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-size: .8rem;
  color: var(--muted);
}

.page-about .ab-crumbs__item + .ab-crumbs__item::before {
  content: "/";
  margin-right: 10px;
  color: rgba(167, 179, 190, .5);
}

.page-about .ab-crumbs__item a {
  color: var(--paper-white);
  text-decoration: none;
  border-bottom: 1px solid rgba(251, 248, 241, .3);
}

.page-about .ab-crumbs__item[aria-current="page"] {
  color: var(--cases);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 8.4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -.025em;
  color: var(--paper-white);
}

.page-about .ab-hero__lede {
  max-width: 40ch;
  margin: 0 0 26px;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(251, 248, 241, .84);
}

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

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

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-l);
  border: 1px solid var(--ab-hair-dark);
  object-fit: cover;
}

.page-about .ab-hero__figure figcaption {
  margin-top: 12px;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 34px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--ab-hair-dark);
}

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

.page-about .ab-stats dt {
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .ab-stats dd {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: .95rem;
  color: var(--paper-white);
}

.page-about .ab-stats dd .bs-mono {
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  font-weight: 700;
  color: var(--cases);
  letter-spacing: -.01em;
}

/* ---------- 方位索引条 ---------- */
.page-about .ab-rail {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  background: var(--paper-white);
  border-bottom: 1px solid var(--ab-hair);
  box-shadow: 0 14px 26px -26px rgba(11, 27, 43, .5);
}

.page-about .ab-rail__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.page-about .ab-rail__label {
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .ab-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-rail__link {
  display: inline-block;
  padding: 3px 0;
  font-size: .84rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--orange);
}

.page-about .ab-rail__link[aria-current="true"] {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 章节通用 ---------- */
.page-about .ab-section {
  padding: 56px 0;
}

.page-about .ab-section--dark {
  background: var(--navy);
  color: var(--paper-white);
}

.page-about .ab-sechead {
  max-width: 62ch;
  margin-bottom: 8px;
}

.page-about .ab-sechead__lede {
  margin: 0;
  font-size: .98rem;
  color: rgba(251, 248, 241, .78);
}

/* ---------- 01 原点 ---------- */
.page-about .ab-origin {
  background: var(--paper);
}

.page-about .ab-origin__grid {
  display: grid;
  gap: 20px;
}

.page-about .ab-origin__body p {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: .98rem;
}

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

.page-about .ab-list li {
  position: relative;
  padding: 12px 16px 12px 34px;
  background: var(--paper-white);
  border-radius: var(--radius-s);
  border-left: 3px solid var(--rights);
  font-size: .92rem;
  box-shadow: var(--shadow-card);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 1.35em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--rights);
}

.page-about .ab-list strong {
  font-family: var(--font-display);
  font-weight: 700;
}

/* ---------- 02 时间刻度 ---------- */
.page-about .ab-tl {
  display: grid;
  gap: 0;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--ab-hair-dark);
}

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

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: .55em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cases);
  box-shadow: 0 0 0 4px rgba(201, 154, 74, .18);
}

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

.page-about .ab-tl__year {
  display: block;
  font-size: .86rem;
  letter-spacing: .04em;
  color: var(--cases);
}

.page-about .ab-tl__title {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper-white);
}

.page-about .ab-tl__text {
  margin: 0;
  max-width: 42ch;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(251, 248, 241, .76);
}

/* ---------- 03 团队 ---------- */
.page-about .ab-team {
  background: var(--paper-white);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 26px;
  margin-top: 8px;
}

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

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-m);
  object-fit: cover;
  border: 1px solid var(--ab-hair);
}

.page-about .ab-team__figure figcaption {
  margin-top: 10px;
  font-size: .8rem;
  color: rgba(23, 32, 38, .66);
}

.page-about .ab-team__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  align-content: start;
}

.page-about .ab-metric {
  padding-top: 10px;
  border-top: 2px solid var(--ink);
}

.page-about .ab-metric__num {
  margin: 0;
  font-size: clamp(1.7rem, 7vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-metric__label {
  margin: 6px 0 0;
  font-size: .82rem;
  color: rgba(23, 32, 38, .7);
}

.page-about .ab-team__notes {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .ab-team__note {
  padding: 20px 22px;
  background: var(--paper);
  border-radius: var(--radius-m);
  border-left: 4px solid var(--rights);
}

.page-about .ab-team__note--visit {
  border-left-color: var(--orange);
}

.page-about .ab-team__note p {
  margin: 0;
  font-size: .92rem;
  max-width: 62ch;
}

/* ---------- 04 资质 ---------- */
.page-about .ab-cert {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-white) 100%);
}

.page-about .ab-cert__grid {
  display: grid;
  gap: 30px;
}

.page-about .ab-cert__text {
  margin: 0 0 22px;
  max-width: 44ch;
  font-size: .95rem;
}

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

.page-about .ab-cert__figure img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: var(--radius-m);
  object-fit: cover;
}

.page-about .ab-cert__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-cert__card {
  padding: 18px 20px;
  background: var(--cases-soft);
  border: 1px solid rgba(201, 154, 74, .4);
  border-radius: var(--radius-l);
  transition: background .25s ease, box-shadow .25s ease, transform .25s ease;
}

.page-about .ab-cert__card:hover,
.page-about .ab-cert__card:focus-within,
.page-about .ab-cert__card:focus {
  background: var(--paper-white);
  box-shadow: var(--shadow-card);
  outline: none;
}

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

.page-about .ab-cert__tag {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .12em;
  color: #8a6524;
}

.page-about .ab-cert__name {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
}

.page-about .ab-cert__sum {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
}

.page-about .ab-cert__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: .87rem;
  line-height: 1.75;
  color: rgba(23, 32, 38, .82);
  transition: max-height .35s ease, opacity .3s ease, margin .3s ease;
}

.page-about .ab-cert__card:hover .ab-cert__more,
.page-about .ab-cert__card:focus .ab-cert__more,
.page-about .ab-cert__card:focus-within .ab-cert__more {
  max-height: 180px;
  margin-top: 8px;
  opacity: 1;
}

/* ---------- 05 生态 ---------- */
.page-about .ab-eco__grid {
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-about .ab-eco__text {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: .95rem;
  color: rgba(251, 248, 241, .82);
}

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

.page-about .ab-eco__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--pill);
  border: 1px solid var(--ab-hair-dark);
  font-size: .84rem;
  color: var(--paper-white);
  cursor: default;
  transition: border-color .2s ease, background .2s ease;
}

.page-about .ab-eco__legend-item--partner:hover {
  border-color: var(--cases);
  background: rgba(201, 154, 74, .14);
}

.page-about .ab-eco__legend-item--research:hover {
  border-color: var(--rights);
  background: rgba(47, 125, 109, .18);
}

.page-about .ab-eco__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .ab-eco__legend-item--partner .ab-eco__dot {
  background: var(--cases);
}

.page-about .ab-eco__legend-item--research .ab-eco__dot {
  background: var(--rights);
}

.page-about .ab-eco__map {
  position: relative;
  max-width: 380px;
  margin: 0 auto;
}

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

.page-about .ab-eco__ring {
  fill: none;
  stroke: rgba(251, 248, 241, .18);
  stroke-width: 1;
  stroke-dasharray: 3 6;
}

.page-about .ab-eco__ring--inner {
  stroke: rgba(201, 154, 74, .28);
}

.page-about .ab-eco__spokes line {
  stroke: rgba(251, 248, 241, .14);
  stroke-width: 1;
}

.page-about .ab-eco__nodes--partner circle {
  fill: var(--cases);
  transition: opacity .25s ease;
}

.page-about .ab-eco__nodes--research circle {
  fill: var(--rights);
  transition: opacity .25s ease;
}

.page-about .ab-eco__core {
  fill: var(--orange);
}

.page-about .ab-eco__mapnote {
  margin: 4px 0 0;
  text-align: center;
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .ab-eco:has(.ab-eco__legend-item--research:hover) .ab-eco__nodes--partner circle {
  opacity: .3;
}

.page-about .ab-eco:has(.ab-eco__legend-item--partner:hover) .ab-eco__nodes--research circle {
  opacity: .3;
}

/* ---------- 06 官网入口 ---------- */
.page-about .ab-verify {
  background: var(--paper);
}

.page-about .ab-verify__grid {
  display: grid;
  gap: 26px;
}

.page-about .ab-verify__copy p {
  margin: 0 0 16px;
  max-width: 56ch;
  font-size: .96rem;
}

.page-about .ab-verify__list {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .ab-verify__list li {
  position: relative;
  padding-left: 20px;
  font-size: .92rem;
  line-height: 1.75;
}

.page-about .ab-verify__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

.page-about .ab-verify__notice {
  max-width: 56ch;
  font-size: .88rem;
  line-height: 1.72;
}

.page-about .ab-verify__panel {
  padding: 24px 22px;
  background: var(--paper-white);
  border: 1px solid var(--ab-hair);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-card);
}

.page-about .ab-verify__panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
}

.page-about .ab-verify__panel-text {
  margin: 6px 0 18px;
  font-size: .86rem;
  color: rgba(23, 32, 38, .7);
}

.page-about .ab-verify__panel .bs-btn {
  margin-bottom: 10px;
}

.page-about .ab-verify__link {
  display: inline-block;
  margin-top: 4px;
  font-size: .86rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ab-hair);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-section {
    padding: 76px 0;
  }

  .page-about .ab-hero {
    padding: calc(var(--header-h) + 34px) 0 72px;
  }

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

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

  .page-about .ab-stats {
    gap: 24px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-section {
    padding: 96px 0;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: 1.08fr .92fr;
    align-items: end;
    gap: 52px;
  }

  .page-about .ab-hero__lede {
    font-size: 1.05rem;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: .78fr 1.22fr;
    gap: 60px;
    align-items: start;
  }

  .page-about .ab-origin__lead {
    position: sticky;
    top: calc(var(--header-h) + 76px);
  }

  .page-about .ab-team__grid {
    grid-template-columns: 1.06fr .94fr;
    gap: 44px;
    align-items: center;
  }

  .page-about .ab-cert__grid {
    grid-template-columns: .85fr 1.15fr;
    gap: 54px;
    align-items: start;
  }

  .page-about .ab-eco__grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 56px;
  }

  .page-about .ab-eco__map {
    max-width: 420px;
  }

  .page-about .ab-verify__grid {
    grid-template-columns: 1.25fr .75fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-tl {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--ab-hair-dark);
    margin-top: 40px;
  }

  .page-about .ab-tl__item {
    padding: 26px 20px 0 0;
  }

  .page-about .ab-tl__item::before {
    left: 0;
    top: -5px;
  }

  .page-about .ab-tl__text {
    max-width: 30ch;
  }
}
<<<END>>>