.page-about {
  --ab-sec-pad: clamp(56px, 8vw, 112px);
  --ab-hair: rgba(46, 122, 99, .42);
  background: var(--mk-900);
  color: var(--warm);
  overflow-x: clip;
}

/* ---------- 通用小节骨架 ---------- */
.page-about .ab-sec {
  padding: var(--ab-sec-pad) 0;
}

.page-about .ab-head {
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .ab-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.02em;
  line-height: 1.2;
  font-size: clamp(1.6rem, 4.4vw, 2.6rem);
}

.page-about .ab-head__lead {
  margin: 16px 0 0;
  color: var(--mist);
  font-size: 17px;
  line-height: 1.75;
}

.page-about .ab-cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--mk-700);
}

.page-about .media__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-band {
  height: 8px;
  width: min(1200px, calc(100% - 40px));
  margin: clamp(8px, 2vw, 24px) auto;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mk-700) 0%, var(--line-300) 52%, var(--volt) 100%);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: -12%;
  right: -14%;
  width: min(520px, 58vw);
  height: 130%;
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(216, 255, 62, .16), rgba(20, 98, 75, .04) 68%, transparent);
  transform: rotate(15deg);
  pointer-events: none;
}

.page-about .ab-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 26px 0 14px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--volt-dim);
}

.page-about .ab-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.02em;
  line-height: 1.1;
  font-size: clamp(2.1rem, 7.6vw, 4.2rem);
  max-width: 18ch;
}

.page-about .ab-hero__lead {
  margin: 22px 0 0;
  max-width: 760px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--warm);
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(34px, 5vw, 60px) 0 0;
  background: var(--ab-hair);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-stat {
  margin: 0;
  padding: 20px 18px;
  background: var(--mk-900);
}

.page-about .ab-stat__num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5.4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--volt);
  line-height: 1.1;
}

.page-about .ab-stat__num span {
  font-size: .48em;
  color: var(--mist);
  letter-spacing: .06em;
}

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

/* ---------- 起点 ---------- */
.page-about .ab-origin {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .ab-origin__main p {
  margin: 0 0 20px;
  line-height: 1.8;
}

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

.page-about .ab-origin__aside {
  position: relative;
  padding: 26px 24px;
  border-radius: var(--r-md);
  background: var(--mk-700);
}

.page-about .ab-origin__aside::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 4px;
  border-radius: 999px;
  background: var(--volt);
}

.page-about .ab-origin__cap {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--volt-dim);
}

.page-about .ab-origin__quote {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  line-height: 1.35;
  color: var(--warm);
}

.page-about .ab-origin__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 时间走廊 ---------- */
.page-about .ab-timeline__band {
  margin-bottom: clamp(32px, 5vw, 56px);
  border-radius: var(--r-md);
}

.page-about .ab-track {
  position: relative;
  margin: 0;
  padding: 0 0 0 40px;
  list-style: none;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--line-300) 0%, var(--volt-dim) 55%, var(--volt) 100%);
  opacity: .55;
}

.page-about .ab-track__item {
  position: relative;
  padding: 4px 0 clamp(34px, 5vw, 60px);
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-track__item:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .ab-track__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--mk-900);
  border: 2px solid var(--line-300);
  transition: border-color 320ms var(--ease), box-shadow 320ms var(--ease);
}

.page-about .ab-track__item.is-in::before {
  border-color: var(--volt);
  box-shadow: 0 0 0 4px rgba(216, 255, 62, .16);
}

.page-about .ab-track__stage {
  margin: 0;
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--volt);
}

.page-about .ab-track__item h3 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  line-height: 1.35;
}

.page-about .ab-track__desc {
  margin: 0;
  max-width: 720px;
  color: var(--warm);
  line-height: 1.8;
}

.page-about .ab-node {
  max-width: 720px;
  margin-top: 16px;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-node summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--volt-dim);
}

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

.page-about .ab-node summary::before {
  content: "+";
  font-size: 16px;
  color: var(--volt);
  line-height: 1;
}

.page-about .ab-node[open] summary::before {
  content: "–";
}

.page-about .ab-node summary:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-about .ab-node p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .ab-crew-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .ab-crew-copy p {
  margin: 0 0 20px;
  line-height: 1.8;
  max-width: 720px;
}

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

.page-about .ab-crew-shot {
  border-radius: var(--r-md);
}

.page-about .ab-donut-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(38px, 6vw, 72px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-donut {
  margin: 0;
  max-width: 320px;
}

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

.page-about .ab-donut__seg {
  transition: stroke-width 160ms var(--ease), opacity 160ms var(--ease);
}

.page-about .ab-donut__seg:hover {
  stroke-width: 30;
}

.page-about .ab-donut__num,
.page-about .ab-donut__cap {
  font-family: var(--font-mono);
  text-anchor: middle;
  fill: var(--warm);
}

.page-about .ab-donut__num {
  font-size: 46px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .ab-donut__cap {
  font-size: 13px;
  letter-spacing: .12em;
  fill: var(--mist);
}

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

.page-about .ab-crew {
  padding: 20px 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-crew:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .ab-crew__top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .ab-crew__dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex: none;
}

.page-about .ab-crew--ops .ab-crew__dot { background: var(--volt); }
.page-about .ab-crew--audit .ab-crew__dot { background: var(--volt-dim); }
.page-about .ab-crew--ux .ab-crew__dot { background: var(--line-300); }
.page-about .ab-crew--support .ab-crew__dot { background: var(--yellow); }

.page-about .ab-crew__n {
  margin-left: auto;
  font-size: 18px;
  color: var(--volt);
}

.page-about .ab-crew__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 数据来源 ---------- */
.page-about .ab-source-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .ab-source-copy p {
  margin: 0 0 20px;
  line-height: 1.8;
}

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

.page-about .ab-source-nums {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.page-about .ab-source-num {
  margin: 0;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--mk-700);
  font-size: 14px;
  color: var(--warm);
}

.page-about .ab-source-num .mono {
  margin-right: 8px;
  color: var(--volt);
  font-size: 16px;
}

.page-about .ab-source-fig {
  border-radius: var(--r-md);
}

/* ---------- 品牌主张 ---------- */
.page-about .ab-claim {
  background: linear-gradient(180deg, var(--mk-900) 0%, var(--mk-700) 100%);
}

.page-about .ab-claim__eyebrow {
  display: block;
  text-align: center;
}

.page-about .ab-claim h2 {
  margin: 14px auto 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.02em;
  line-height: 1.25;
  font-size: clamp(1.5rem, 4.6vw, 2.4rem);
  text-align: center;
  max-width: 22ch;
}

.page-about .ab-claim__list {
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 26px;
}

.page-about .ab-claim__list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 16px;
  align-items: start;
}

.page-about .ab-claim__n {
  margin: 3px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--volt);
  text-align: center;
}

.page-about .ab-claim__list p:last-child {
  margin: 0;
  line-height: 1.8;
}

.page-about .ab-claim__close {
  margin: clamp(36px, 5vw, 56px) 0 0;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 3.4vw, 1.4rem);
  color: var(--volt);
}

/* ---------- 行业参与 ---------- */
.page-about .ab-honors {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-honor {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-honor:last-child {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-honor__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--volt);
}

.page-about .ab-honor__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm);
}

/* ---------- 行动区 ---------- */
.page-about .ab-cta {
  padding-bottom: clamp(72px, 10vw, 140px);
}

.page-about .ab-cta__box {
  position: relative;
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, var(--mk-500) 0%, var(--mk-700) 62%, var(--mk-900) 100%);
  overflow: hidden;
}

.page-about .ab-cta__box::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(216, 255, 62, .28), transparent 72%);
  pointer-events: none;
}

.page-about .ab-cta__box h2 {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.02em;
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  line-height: 1.2;
}

.page-about .ab-cta__box > p {
  position: relative;
  margin: 18px 0 0;
  max-width: 640px;
  line-height: 1.8;
}

.page-about .ab-cta__acts {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-cta__meta {
  position: relative;
  margin: 22px 0 0;
  font-size: 14px;
  color: var(--mist);
}

.page-about .ab-cta__meta a {
  color: var(--volt);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

  .page-about .ab-honor {
    grid-template-columns: 240px 1fr;
    gap: 32px;
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-about .ab-origin {
    grid-template-columns: 7fr 4fr;
    align-items: start;
  }

  .page-about .ab-crew-grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
  }

  .page-about .ab-donut-grid {
    grid-template-columns: 4fr 8fr;
    align-items: center;
  }

  .page-about .ab-source-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .ab-claim__list {
    gap: 32px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-track {
    padding-left: 56px;
  }

  .page-about .ab-track::before {
    left: 15px;
  }

  .page-about .ab-track__item::before {
    left: -48px;
    width: 18px;
    height: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-track__item::before,
  .page-about .ab-donut__seg {
    transition: none;
  }
}
<<<END>>>