.page-about {
  --ab-hair: rgba(13, 27, 42, .12);
  --ab-hair-ink: rgba(244, 240, 230, .16);
  --ab-deep: rgba(22, 57, 79, .82);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
}
.page-about .ab-hero__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 62% at 78% 18%, rgba(228, 87, 46, .30), transparent 70%),
    radial-gradient(52% 54% at 12% 96%, rgba(46, 158, 99, .16), transparent 72%);
}
.page-about .ab-hero__glow::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(244, 240, 230, .055) 0 1px, transparent 1px 18px);
}
.page-about .ab-hero .wrap {
  position: relative;
  z-index: 1;
}
.page-about .ab-hero .breadcrumb__item {
  color: var(--on-ink-faint);
}
.page-about .ab-hero .breadcrumb__item a {
  color: inherit;
  text-decoration: none;
}
.page-about .ab-hero .breadcrumb__item a:hover {
  color: var(--volt);
}
.page-about .ab-hero .eyebrow {
  color: var(--clay-hot);
}
.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(30px, 4.5vw, 48px);
}
.page-about .ab-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(2.05rem, 6.4vw, 3.95rem);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: -.025em;
  color: var(--white);
}
.page-about .ab-hero h1 br {
  display: none;
}
.page-about .ab-hero__lead .lede {
  margin: 18px 0 0;
  max-width: 54ch;
  color: var(--on-ink);
}
.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-hair-ink);
  border: 1px solid var(--ab-hair-ink);
  clip-path: var(--clip-cut);
  overflow: hidden;
}
.page-about .ab-fact {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 18px 16px 20px;
  background: var(--ab-deep);
}
.page-about .ab-fact__v {
  font-family: var(--font-num);
  font-size: clamp(1.85rem, 5vw, 2.55rem);
  font-weight: 700;
  line-height: .94;
  letter-spacing: .01em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-fact__v em {
  font-style: normal;
  font-size: .46em;
  margin-left: 3px;
  letter-spacing: .04em;
  color: var(--volt);
}
.page-about .ab-fact__l {
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-ink);
}

/* ---------- 目录 ---------- */
.page-about .ab-toc__title {
  margin: 10px 0 0;
  font-size: clamp(1.45rem, 3.4vw, 2.25rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-about .ab-toc__list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-hair);
}
.page-about .ab-toc__list > li {
  border-bottom: 1px solid var(--ab-hair);
}
.page-about .ab-toc__link {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 18px 6px;
  color: var(--ink);
  text-decoration: none;
  transition: background-color .18s var(--ease), padding-inline-start .18s var(--ease);
}
.page-about .ab-toc__num {
  font-family: var(--font-num);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--stone-2);
  font-variant-numeric: tabular-nums;
  transition: color .18s var(--ease);
}
.page-about .ab-toc__name {
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: .005em;
}
.page-about .ab-toc__desc {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.62;
  color: var(--stone);
}
.page-about .ab-toc__link:hover,
.page-about .ab-toc__link:focus-visible {
  background: var(--paper-soft);
  padding-inline-start: 16px;
}
.page-about .ab-toc__link:hover .ab-toc__num,
.page-about .ab-toc__link:focus-visible .ab-toc__num {
  color: var(--clay);
}
@media (min-width: 820px) {
  .page-about .ab-toc__link {
    grid-template-columns: 64px minmax(12ch, 20ch) minmax(0, 1fr);
    gap: 22px;
    align-items: center;
    padding-block: 22px;
  }
  .page-about .ab-toc__desc {
    grid-column: 3;
  }
}

/* ---------- 区块标题 ---------- */
.page-about .ab-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 44px);
}
.page-about .ab-head__idx {
  font-family: var(--font-num);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-head__text h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-about .ab-head__text .lede {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--stone);
}
.page-about .ab-head--ink .ab-head__text h2 {
  color: var(--white);
}
.page-about .ab-head--ink .ab-head__text .lede {
  color: var(--on-ink);
}
@media (min-width: 760px) {
  .page-about .ab-head {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }
  .page-about .ab-hero h1 br {
    display: inline;
  }
}

/* ---------- 01 起点 ---------- */
.page-about .ab-split {
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}
.page-about .ab-prose p {
  margin: 0 0 18px;
  max-width: 64ch;
  color: var(--stone);
  line-height: 1.78;
}
.page-about .ab-prose p strong {
  color: var(--ink);
  font-weight: 700;
}
.page-about .ab-bullets {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .ab-bullets li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}
.page-about .ab-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 9px;
  height: 9px;
  background: var(--clay);
  transform: rotate(45deg);
}
.page-about .ab-shot {
  margin: 0;
  position: relative;
}
.page-about .ab-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-split__fig {
  margin-top: 4px;
}

/* ---------- 02 时间轴 ---------- */
.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}
.page-about .ab-tl__item {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid var(--ab-hair-ink);
}
.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 11px;
  height: 11px;
  background: var(--clay);
  transform: rotate(45deg);
}
.page-about .ab-tl__item:last-child::before {
  background: var(--volt);
}
.page-about .ab-tl__year {
  display: block;
  min-height: 1.35rem;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.35rem;
  letter-spacing: .06em;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-tl__year.is-word {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--on-ink-faint);
}
.page-about .ab-tl__card {
  border-left: 2px solid rgba(228, 87, 46, .55);
  padding-left: 13px;
}
.page-about .ab-tl__card > summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 2px 0;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--on-ink-strong);
  cursor: pointer;
  list-style: none;
}
.page-about .ab-tl__card > summary::-webkit-details-marker {
  display: none;
}
.page-about .ab-tl__card > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-num);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
  color: var(--clay-hot);
}
.page-about .ab-tl__card[open] > summary::after {
  content: "−";
}
.page-about .ab-tl__card > summary:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
}
.page-about .ab-tl__card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--on-ink);
}
.page-about .ab-tl__card p a {
  color: var(--volt);
  text-decoration: underline;
  text-underline-offset: 3px;
}
@media (min-width: 900px) {
  .page-about .ab-tl {
    display: flex;
    gap: 18px;
    overflow-x: auto;
    padding-bottom: 10px;
    scroll-snap-type: x proximity;
  }
  .page-about .ab-tl__item {
    flex: 1 0 202px;
    scroll-snap-align: start;
  }
}

/* ---------- 03 团队 ---------- */
.page-about .ab-team__chips {
  margin-bottom: 26px;
}
.page-about .ab-team__grid {
  display: grid;
  gap: 24px;
}
.page-about .ab-role {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: 24px 22px 26px;
}
.page-about .ab-role .panel__title {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .ab-role__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .ab-role__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}
.page-about .ab-role__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  background: var(--grass);
  transform: rotate(45deg);
}
.page-about .ab-team__media {
  display: grid;
  gap: 24px;
  margin-top: 34px;
}
.page-about .ab-team__note h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .ab-team__note p {
  margin: 0 0 12px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--stone);
}
.page-about .ab-team__note p:last-child {
  margin-bottom: 0;
}
@media (min-width: 780px) {
  .page-about .ab-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (min-width: 900px) {
  .page-about .ab-team__media {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

/* ---------- 04 流程 ---------- */
.page-about .ab-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(26px, 4vw, 42px);
  padding: 0;
  list-style: none;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
  clip-path: var(--clip-cut);
  overflow: hidden;
}
.page-about .ab-steps .stepbar__item {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 18px 16px 20px;
  background: var(--white);
}
.page-about .ab-steps .stepbar__index {
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-steps .stepbar__text {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}
.page-about .ab-method__panels {
  gap: 24px;
}
.page-about .ab-check {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: 24px 22px 26px;
}
.page-about .ab-check .panel__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .ab-check ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}
.page-about .ab-check li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}
.page-about .ab-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 11px;
  height: 2px;
  background: var(--clay);
}
@media (min-width: 760px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* ---------- 05 覆盖与响应 ---------- */
.page-about .ab-reach__grid {
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}
.page-about .ab-reach__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-hair-ink);
  border: 1px solid var(--ab-hair-ink);
  clip-path: var(--clip-cut);
  overflow: hidden;
}
.page-about .ab-stat {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 18px 22px;
  background: var(--ab-deep);
}
.page-about .ab-stat .stat__value {
  font-family: var(--font-num);
  font-size: clamp(1.8rem, 4.6vw, 2.5rem);
  font-weight: 700;
  line-height: .96;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-stat .stat__value em {
  font-style: normal;
  font-size: .46em;
  margin-left: 3px;
  color: var(--volt);
}
.page-about .ab-stat .stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-ink);
}
.page-about .ab-reach__note {
  margin: 26px 0 0;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-ink);
}

/* ---------- 06 资质与合作 ---------- */
.page-about .ab-cert__grid {
  gap: 24px;
  align-items: start;
}
.page-about .ab-cert__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .ab-cert {
  padding: 18px 20px 20px 22px;
  background: var(--white);
  clip-path: var(--clip-cut-sm);
  box-shadow: inset 3px 0 0 var(--grass);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.page-about .ab-cert:hover,
.page-about .ab-cert:focus-within {
  transform: translateY(-2px);
  box-shadow: inset 3px 0 0 var(--clay), 0 16px 30px -24px rgba(13, 27, 42, .55);
}
.page-about .ab-cert h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink);
}
.page-about .ab-cert p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}
.page-about .ab-partners {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: 22px 20px 24px;
}
.page-about .ab-partners .panel__title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .ab-partners__lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}
.page-about .ab-partners ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-about .ab-partners li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: var(--ink);
}
.page-about .ab-partners li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--clay);
  transform: rotate(45deg);
}

/* ---------- 收尾 ---------- */
.page-about .ab-close {
  position: relative;
  overflow: hidden;
}
.page-about .ab-close__in {
  display: grid;
  justify-items: center;
  gap: 22px;
  text-align: center;
}
.page-about .ab-close__arc {
  width: min(560px, 92%);
  height: auto;
  overflow: visible;
}
.page-about .ab-close__arc path {
  fill: none;
  stroke: var(--clay);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: ab-draw 1.2s var(--ease) .2s forwards;
}
@keyframes ab-draw {
  to {
    stroke-dashoffset: 0;
  }
}
.page-about .ab-close__line {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(1.3rem, 3.4vw, 2.05rem);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -.015em;
  color: var(--white);
}
.page-about .ab-close__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-close__arc path {
    animation: none;
    stroke-dashoffset: 0;
  }
  .page-about .ab-cert,
  .page-about .ab-toc__link {
    transition: none;
  }
}
<<<END>>>