.page-about {
  --ab-more-max: 240px;
  font-family: var(--fg-font-body);
  color: var(--fg-paper);
  overflow-x: clip;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about a:focus-visible,
.page-about li:focus-visible {
  outline: 2px solid var(--fg-cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-top {
  padding-top: clamp(96px, 14vw, 152px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .ab-top .fg-breadcrumb {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-about .ab-eyebrow {
  margin: 0 0 16px;
  font-family: var(--fg-font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-cyan);
}

.page-about .ab-hero {
  display: grid;
  gap: clamp(26px, 5vw, 54px);
  align-items: start;
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(16px, 3vw, 26px);
  font-family: var(--fg-font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.2vw, 92px);
  line-height: .99;
  letter-spacing: -.02em;
}

.page-about .ab-hero__title em {
  font-style: normal;
  background: linear-gradient(96deg, var(--fg-cyan), var(--fg-violet) 58%, var(--fg-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .ab-hero__lead {
  max-width: 54ch;
  margin: 0 0 clamp(22px, 3.4vw, 32px);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--fg-mist);
}

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

.page-about .ab-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--fg-line);
  font-family: var(--fg-font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--fg-mist);
}

.page-about .ab-hero__facts b {
  font-size: 15px;
  color: var(--fg-cyan);
}

.page-about .ab-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--fg-line-strong);
  border-radius: var(--fg-radius);
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
  background:
    linear-gradient(150deg, rgba(47, 243, 255, .18), rgba(154, 92, 255, .16) 58%, rgba(7, 8, 15, .55));
  box-shadow: var(--fg-glow-violet);
}

.page-about .ab-hero__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .ab-hero__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 5px 9px;
  font-family: var(--fg-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--fg-paper);
  background: rgba(7, 8, 15, .74);
  border-radius: 2px;
}

/* ---------- 通用区块头 ---------- */
.page-about .ab-kicker {
  margin: 0;
  font-family: var(--fg-font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--fg-coral);
}

.page-about .ab-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .ab-head h2 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--fg-font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 48px);
  line-height: 1.08;
  letter-spacing: -.015em;
}

.page-about .ab-head p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-mist);
}

.page-about .ab-head .ab-kicker {
  color: var(--fg-coral);
}

/* ---------- 品牌起点 ---------- */
.page-about .ab-origin {
  padding-block: clamp(44px, 7vw, 92px);
}

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

.page-about .ab-paper {
  padding: clamp(24px, 4vw, 48px);
  color: var(--fg-brown);
  background: var(--fg-paper);
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .ab-paper h2 {
  margin: 12px 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--fg-font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.8vw, 42px);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--fg-brown);
}

.page-about .ab-paper p {
  max-width: 68ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
}

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

.page-about .ab-paper .ab-kicker {
  color: var(--fg-coral);
}

.page-about .ab-notes {
  display: grid;
  gap: 10px;
}

.page-about .ab-note {
  padding: 18px 18px 20px;
  border: 1px solid var(--fg-line);
  border-left: 2px solid var(--fg-violet);
  border-radius: 0 var(--fg-radius-sm) var(--fg-radius-sm) 0;
  background: linear-gradient(118deg, rgba(17, 21, 34, .94), rgba(10, 12, 22, .58));
  transition: border-color .2s, box-shadow .2s;
}

.page-about .ab-note:hover {
  border-left-color: var(--fg-cyan);
  box-shadow: var(--fg-glow-cyan);
}

.page-about .ab-note__idx {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fg-coral);
}

.page-about .ab-note h3 {
  margin: 6px 0 6px;
  font-family: var(--fg-font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .ab-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-mist);
}

/* ---------- 发展历程 ---------- */
.page-about .ab-timeline {
  padding-block: clamp(44px, 8vw, 108px);
}

.page-about .ab-timeline__body {
  display: grid;
  gap: 18px;
}

.page-about .ab-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-self: start;
}

.page-about .ab-years a {
  display: inline-flex;
  padding: 6px 12px;
  font-family: var(--fg-font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--fg-mist);
  text-decoration: none;
  border: 1px solid var(--fg-line);
  border-radius: var(--fg-radius-pill);
  transition: color .18s, border-color .18s, box-shadow .18s;
}

.page-about .ab-years a:hover,
.page-about .ab-years a:focus-visible {
  color: var(--fg-cyan);
  border-color: var(--fg-line-strong);
  box-shadow: var(--fg-glow-cyan);
}

.page-about .ab-nodes {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-node {
  position: relative;
  padding: 20px 20px 20px 28px;
  scroll-margin-top: 118px;
  border: 1px solid var(--fg-line);
  border-radius: var(--fg-radius-sm) var(--fg-radius) var(--fg-radius) var(--fg-radius-sm);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  background: linear-gradient(112deg, rgba(17, 21, 34, .95), rgba(10, 12, 22, .6));
  transition: border-color .22s, box-shadow .22s;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 26px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--fg-cyan);
  box-shadow: 0 0 12px 2px rgba(47, 243, 255, .65);
}

.page-about .ab-node:hover,
.page-about .ab-node:focus-within {
  border-color: var(--fg-line-strong);
  box-shadow: var(--fg-glow-cyan);
}

.page-about .ab-node__year {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fg-coral);
}

.page-about .ab-node h3 {
  margin: 8px 0 8px;
  font-family: var(--fg-font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 25px);
  line-height: 1.25;
}

.page-about .ab-node > p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-mist);
}

.page-about .ab-node__more {
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  color: var(--fg-paper);
  border-top: 1px solid transparent;
  transition: max-height .3s ease, opacity .24s ease, margin-top .3s ease, padding-top .3s ease;
}

.page-about .ab-node:hover .ab-node__more,
.page-about .ab-node:focus-within .ab-node__more {
  max-height: var(--ab-more-max);
  margin-top: 12px;
  padding-top: 12px;
  opacity: 1;
  border-top-color: var(--fg-line);
}

/* ---------- 数据规模 ---------- */
.page-about .ab-scale {
  padding-block: clamp(44px, 7vw, 100px);
}

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

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

.page-about .ab-metrics li {
  display: grid;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--fg-ink);
}

.page-about .ab-metrics__num {
  font-family: var(--fg-font-mono);
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1;
  color: var(--fg-cyan);
}

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

.page-about .ab-metrics__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--fg-mist);
}

.page-about .ab-scale__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--fg-line);
  border-radius: var(--fg-radius);
  clip-path: polygon(9% 0, 100% 0, 100% 100%, 0 100%, 0 9%);
  background:
    radial-gradient(circle at 28% 22%, rgba(154, 92, 255, .24), transparent 62%),
    var(--fg-stage-2);
}

.page-about .ab-scale__media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .ab-scale__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 5px 9px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--fg-paper);
  background: rgba(7, 8, 15, .74);
  border-radius: 2px;
}

/* ---------- 团队矩阵 ---------- */
.page-about .ab-team {
  padding-block: clamp(44px, 8vw, 108px);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 12px;
}

.page-about .ab-team__media {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--fg-line);
  border-radius: var(--fg-radius);
  background: var(--fg-stage);
}

.page-about .ab-team__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-team__media figcaption {
  padding: 10px 14px 12px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--fg-mist);
  border-top: 1px solid var(--fg-line);
}

.page-about .ab-role {
  padding: 20px 18px 22px;
  border: 1px solid var(--fg-line);
  border-radius: var(--fg-radius-sm);
  background: linear-gradient(158deg, rgba(17, 21, 34, .92), rgba(7, 8, 15, .62));
  transition: border-color .2s, box-shadow .2s;
}

.page-about .ab-role:hover {
  border-color: rgba(154, 92, 255, .62);
  box-shadow: var(--fg-glow-violet);
}

.page-about .ab-role__count {
  display: block;
  font-family: var(--fg-font-mono);
  font-size: clamp(30px, 4.6vw, 44px);
  line-height: 1;
  color: var(--fg-violet);
}

.page-about .ab-role h3 {
  margin: 10px 0 8px;
  font-family: var(--fg-font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .01em;
}

.page-about .ab-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fg-mist);
}

/* ---------- 合作生态与荣誉 ---------- */
.page-about .ab-eco {
  padding-block: clamp(44px, 7vw, 100px);
}

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

.page-about .ab-eco__main h2 {
  margin: 12px 0 20px;
  font-family: var(--fg-font-display);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: -.015em;
}

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

.page-about .ab-eco__list li {
  padding: 16px 0;
  border-bottom: 1px dashed var(--fg-line);
}

.page-about .ab-eco__list li:first-child {
  border-top: 1px dashed var(--fg-line);
}

.page-about .ab-eco__list h3 {
  margin: 0 0 6px;
  font-family: var(--fg-font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--fg-cyan);
  letter-spacing: .02em;
}

.page-about .ab-eco__list p {
  max-width: 62ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fg-mist);
}

.page-about .ab-honor {
  align-self: start;
  padding: clamp(20px, 3vw, 30px);
  color: var(--fg-brown);
  background: var(--fg-paper);
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .ab-honor__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--fg-coral);
}

.page-about .ab-honor__text {
  margin: 0 0 14px;
  font-family: var(--fg-font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.45;
}

.page-about .ab-honor__note {
  margin: 0;
  padding-top: 14px;
  font-size: 13px;
  line-height: 1.8;
  border-top: 1px solid rgba(27, 18, 14, .18);
}

/* ---------- 协作方式 ---------- */
.page-about .ab-process {
  padding-block: clamp(44px, 8vw, 108px);
}

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

.page-about .ab-steps li {
  padding: 18px 16px 20px;
  border-top: 2px solid var(--fg-cyan);
  background: linear-gradient(180deg, rgba(47, 243, 255, .09), rgba(7, 8, 15, 0) 72%);
}

.page-about .ab-steps li:nth-child(2) {
  border-top-color: var(--fg-violet);
  background: linear-gradient(180deg, rgba(154, 92, 255, .1), rgba(7, 8, 15, 0) 72%);
}

.page-about .ab-steps li:nth-child(3) {
  border-top-color: var(--fg-magenta);
  background: linear-gradient(180deg, rgba(255, 45, 170, .09), rgba(7, 8, 15, 0) 72%);
}

.page-about .ab-steps li:nth-child(4) {
  border-top-color: var(--fg-lime);
  background: linear-gradient(180deg, rgba(168, 255, 62, .08), rgba(7, 8, 15, 0) 72%);
}

.page-about .ab-steps li:nth-child(5) {
  border-top-color: var(--fg-coral);
  background: linear-gradient(180deg, rgba(255, 106, 61, .09), rgba(7, 8, 15, 0) 72%);
}

.page-about .ab-steps__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fg-paper);
}

.page-about .ab-steps h3 {
  margin: 8px 0 8px;
  font-family: var(--fg-font-display);
  font-weight: 700;
  font-size: 17px;
}

.page-about .ab-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fg-mist);
}

.page-about .ab-cta {
  margin-top: clamp(26px, 4vw, 46px);
  padding: clamp(22px, 3.6vw, 40px);
  border: 1px solid rgba(47, 243, 255, .32);
  border-radius: var(--fg-radius);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
  background: linear-gradient(118deg, rgba(47, 243, 255, .14), rgba(154, 92, 255, .18) 56%, rgba(255, 45, 170, .12));
}

.page-about .ab-cta__title {
  margin: 0 0 10px;
  font-family: var(--fg-font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.25;
}

.page-about .ab-cta__text {
  max-width: 56ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-paper);
}

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

.page-about .ab-cta__links {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--fg-mist);
}

.page-about .ab-cta__links a {
  color: var(--fg-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 255, .5);
  transition: color .18s, border-color .18s;
}

.page-about .ab-cta__links a:hover,
.page-about .ab-cta__links a:focus-visible {
  color: #fff;
  border-bottom-color: #fff;
}

.page-about .ab-totop {
  display: inline-flex;
  margin-top: 30px;
  font-family: var(--fg-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--fg-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s, border-color .18s;
}

.page-about .ab-totop:hover,
.page-about .ab-totop:focus-visible {
  color: var(--fg-cyan);
  border-bottom-color: var(--fg-cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .ab-hero__media {
    margin-top: 14px;
  }

  .page-about .ab-timeline__body {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .ab-years {
    flex-direction: column;
    align-items: flex-start;
    position: sticky;
    top: 108px;
  }

  .page-about .ab-scale__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: stretch;
  }

  .page-about .ab-scale__media img {
    height: 100%;
    aspect-ratio: auto;
  }

  .page-about .ab-team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .ab-team__media {
    grid-column: 1 / span 5;
    grid-row: 1 / span 2;
    display: flex;
    flex-direction: column;
  }

  .page-about .ab-team__media img {
    flex: 1;
    min-height: 240px;
    aspect-ratio: auto;
    object-fit: cover;
  }

  .page-about .ab-role--1 {
    grid-column: 6 / span 7;
  }

  .page-about .ab-role--2 {
    grid-column: 6 / span 4;
  }

  .page-about .ab-role--3 {
    grid-column: 10 / span 3;
  }

  .page-about .ab-eco__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .ab-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-node__more,
  .page-about .ab-node,
  .page-about .ab-note,
  .page-about .ab-role,
  .page-about .ab-years a,
  .page-about .ab-totop,
  .page-about .ab-cta__links a {
    transition: none;
  }
}
<<<END>>>