.page-about {
  background: var(--ink-deep);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about .breadcrumbs {
  padding-top: 18px;
  padding-bottom: 18px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(42px, 7vw, 88px);
  border-bottom: 1px solid var(--grid-line);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 0 56%, rgba(37, 56, 45, 0.72) 56% 100%),
    radial-gradient(circle at 88% 2%, rgba(184, 255, 60, 0.16), transparent 52%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 27%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--grid-line) 28%, var(--grid-line) 72%, transparent);
  pointer-events: none;
}

.page-about .ab-hero__wrap {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-about .ab-hero h1 {
  font-size: clamp(32px, 6.4vw, 64px);
  margin-top: 14px;
  max-width: 16em;
}

.page-about .ab-hero h1 em {
  font-style: normal;
  color: var(--acid);
}

.page-about .ab-hero__lede {
  margin-top: 20px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
}

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

.page-about .ab-hero__aside {
  position: relative;
  padding-top: 20px;
  border-top: 2px solid var(--acid);
}

.page-about .ab-hero__aside .anchor-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(72px, 17vw, 124px);
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: var(--acid);
}

.page-about .ab-hero__aside > p {
  margin-top: 14px;
  max-width: 24em;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid-line);
}

.page-about .ab-hero__stats li {
  background: var(--ink-deep);
  padding: 12px 14px 14px;
}

.page-about .ab-hero__stats .num {
  display: block;
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  color: var(--acid);
}

.page-about .ab-hero__stats .unit {
  font-size: 14px;
  margin-left: 2px;
}

.page-about .ab-hero__stats .cap {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 章节头 ---------- */
.page-about .ab-head {
  max-width: 46rem;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .ab-head h2 {
  margin-top: 10px;
  font-size: clamp(25px, 4.2vw, 40px);
}

.page-about .ab-head__lede {
  margin-top: 14px;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 通用图片 ---------- */
.page-about .ab-fig {
  margin: 0;
}

.page-about .ab-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--grid-line);
}

.page-about .ab-fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .ab-fig--wide {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .ab-fig--wide img {
  aspect-ratio: 1400 / 640;
}

.page-about .ab-fig--team img {
  aspect-ratio: 1200 / 780;
}

/* ---------- 历程 / 时间线 ---------- */
.page-about .ab-history {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
  background-image: repeating-linear-gradient(90deg, rgba(37, 56, 45, 0.45) 0 1px, transparent 1px 104px);
}

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

.page-about .ab-tl__item {
  position: relative;
  padding: 0 0 6px 34px;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: -4px;
  width: 1px;
  background: var(--grid-line);
}

.page-about .ab-tl__item:last-child::before {
  display: none;
}

.page-about .ab-tl__item::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 13px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 0 4px rgba(184, 255, 60, 0.12);
}

.page-about .ab-node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 2px 0 10px;
}

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

.page-about .ab-node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 18px;
  line-height: 1;
  color: var(--acid);
}

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

.page-about .ab-node:focus-within summary {
  outline: 1px solid var(--acid);
  outline-offset: 4px;
}

.page-about .ab-node__season {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--acid);
  min-width: 86px;
}

.page-about .ab-node__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 22px);
  letter-spacing: -0.01em;
}

.page-about .ab-node__body {
  padding: 0 0 20px;
  max-width: 40em;
}

.page-about .ab-node__body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .ab-tl__side {
  margin-top: 32px;
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .ab-note {
  border-left: 2px solid var(--grid-line);
  padding: 2px 0 2px 16px;
}

.page-about .ab-note__num {
  display: block;
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1.1;
  color: var(--acid);
}

.page-about .ab-note__num small {
  font-size: 13px;
  color: var(--muted);
  margin-left: 4px;
}

.page-about .ab-note p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
  background: var(--carbon);
}

.page-about .ab-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-roles {
  border-top: 1px solid var(--grid-line);
}

.page-about .ab-role {
  display: grid;
  gap: 6px;
  padding: 20px 14px 22px;
  border-bottom: 1px solid var(--grid-line);
  border-left: 2px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  background: rgba(184, 255, 60, 0.06);
  border-left-color: var(--acid);
}

.page-about .ab-role__num {
  font-family: var(--font-num);
  font-size: 28px;
  line-height: 1;
  color: var(--acid);
}

.page-about .ab-role__num--txt {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--whistle);
  padding-top: 6px;
}

.page-about .ab-role h3 {
  font-size: 18px;
}

.page-about .ab-role p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 生产流程 ---------- */
.page-about .ab-flow-sec {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
}

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

.page-about .ab-stage {
  background: var(--ink-deep);
  padding: 22px 20px 26px;
}

.page-about .ab-stage__idx {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--whistle);
}

.page-about .ab-stage h3 {
  font-size: 19px;
  margin-bottom: 14px;
}

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

.page-about .ab-stage li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-stage li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background: var(--acid);
}

/* ---------- 数据体系（暖纸白长文） ---------- */
.page-about .ab-data {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
  background: var(--carbon);
}

.page-about .ab-data__paper {
  background: var(--paper);
  color: var(--paper-ink);
  padding: clamp(22px, 4vw, 52px);
}

.page-about .ab-data__paper .label {
  color: #4a6b34;
}

.page-about .ab-data__paper h2 {
  margin-top: 10px;
  font-size: clamp(24px, 3.8vw, 38px);
  color: var(--paper-ink);
}

.page-about .ab-data__paper h3 {
  margin: 30px 0 10px;
  font-size: 20px;
  color: var(--paper-ink);
}

.page-about .ab-data__paper p {
  margin-top: 14px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: #2b3a30;
}

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

.page-about .ab-data__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 540;
  object-fit: cover;
}

.page-about .ab-data__fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #5c6f5f;
}

.page-about .ab-spec {
  margin: 30px 0 0;
  border-top: 1px solid rgba(22, 36, 28, 0.22);
}

.page-about .ab-spec__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(22, 36, 28, 0.16);
}

.page-about .ab-spec dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #4a6b34;
}

.page-about .ab-spec dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--paper-ink);
}

.page-about .ab-spec__v {
  font-family: var(--font-num);
  font-size: 15px;
  color: #2f4a22;
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
  background: var(--carbon);
}

.page-about .ab-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
}

.page-about .ab-eco__list li {
  background: var(--carbon);
  padding: 24px 20px 26px;
}

.page-about .ab-eco__num {
  display: block;
  font-family: var(--font-num);
  font-size: 42px;
  line-height: 1;
  color: var(--acid);
}

.page-about .ab-eco__list h3 {
  margin: 12px 0 8px;
  font-size: 17px;
}

.page-about .ab-eco__list p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-eco__foot {
  margin-top: 26px;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .ab-eco__foot a {
  color: var(--acid);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 255, 60, 0.45);
  margin-left: 4px;
}

.page-about .ab-eco__foot a:hover {
  border-bottom-color: var(--acid);
}

/* ---------- 服务谁 ---------- */
.page-about .ab-who {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
}

.page-about .ab-who__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .ab-who__card {
  border-top: 2px solid var(--acid);
  padding-top: 18px;
}

.page-about .ab-who__card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.page-about .ab-who__card p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .ab-who__card ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-who__card li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.page-about .ab-who__card li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.68em;
  width: 5px;
  height: 5px;
  background: var(--whistle);
}

/* ---------- 内容更新与反馈 ---------- */
.page-about .ab-mend {
  padding: clamp(40px, 7vw, 86px) 0;
  border-top: 1px solid var(--grid-line);
  background: var(--carbon);
}

.page-about .ab-mend__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .ab-mend h2 {
  margin-top: 10px;
  font-size: clamp(24px, 3.8vw, 36px);
}

.page-about .ab-mend__text {
  margin-top: 16px;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-mend__links {
  display: grid;
  gap: 12px;
  padding: 22px 20px 24px;
  background: var(--glass);
  border: 1px solid var(--grid-line);
}

.page-about .ab-mend__links .label {
  color: var(--acid);
}

.page-about .ab-mend__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 收束 CTA ---------- */
.page-about .ab-cta {
  padding: clamp(34px, 6vw, 68px) 0;
  border-top: 1px solid var(--grid-line);
  background:
    linear-gradient(100deg, rgba(184, 255, 60, 0.12), transparent 62%),
    var(--ink-deep);
}

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

.page-about .ab-cta h2 {
  font-size: clamp(22px, 3.6vw, 34px);
  max-width: 20em;
}

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

/* ---------- 中屏与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .ab-role {
    grid-template-columns: 76px minmax(0, 172px) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .ab-role__num--txt {
    padding-top: 0;
  }

  .page-about .ab-spec__row {
    grid-template-columns: minmax(0, 180px) minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .ab-node__body {
    padding-left: 100px;
  }
}

@media (min-width: 820px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero__wrap {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .ab-mend__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }

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

@media (min-width: 940px) {
  .page-about .ab-tl {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: clamp(30px, 5vw, 72px);
    align-items: start;
  }

  .page-about .ab-tl__side {
    margin-top: 0;
    position: sticky;
    top: 104px;
  }

  .page-about .ab-hero::after {
    right: 31%;
  }
}

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