.page-about {
  --about-pad: clamp(56px, 7vw, 104px);
  --about-dim: rgba(174, 185, 207, 0.66);
  --about-paper-ink: #2A2F3D;
  --about-paper-violet: #5B4BD1;
  --about-paper-teal: #0E7F73;
  position: relative;
  display: block;
  background:
    radial-gradient(1100px 560px at 88% -8%, rgba(53, 242, 220, 0.09), transparent 62%),
    radial-gradient(900px 520px at -6% 46%, rgba(139, 123, 255, 0.08), transparent 64%),
    var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .section {
  padding-top: 0;
  padding-bottom: 0;
}

.page-about .breadcrumb {
  padding: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}

.page-about .breadcrumb__item a {
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .breadcrumb__item a:hover,
.page-about .breadcrumb__item a:focus-visible {
  color: var(--cyan);
}

.page-about .breadcrumb__item span {
  color: var(--cyan);
}

.page-about .about-hl {
  color: var(--cyan);
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .section__head {
  max-width: 68ch;
}

.page-about .section__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  padding-top: clamp(28px, 4vw, 46px);
}

.page-about .about-cover__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-index {
  border-left: 2px solid var(--line-cyan);
  padding-left: 16px;
}

.page-about .about-index__label {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-size: 12.5px;
  letter-spacing: 0.26em;
  color: var(--cyan);
}

.page-about .about-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-size: 12.5px;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

.page-about .about-index__list .mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  min-width: 44px;
  color: var(--paper);
}

.page-about .about-index__note {
  margin: 16px 0 0;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--about-dim);
}

.page-about .about-cover__main h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.6vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.018em;
  color: var(--paper);
}

.page-about .about-cover__lead {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-cover__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cover__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--ink-2);
}

.page-about .about-cover__stats .mono {
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-cover__stats span:last-child {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--about-dim);
}

.page-about .about-cover__media {
  margin: 32px 0 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-3);
}

.page-about .about-cover__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 三条主线 ---------- */
.page-about .about-pillars {
  padding-top: var(--about-pad);
}

.page-about .about-pillars__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 30px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-pillar {
  padding: 26px 20px 30px;
  background: var(--ink);
}

.page-about .about-pillar:nth-child(1) {
  background:
    linear-gradient(180deg, rgba(53, 242, 220, 0.07), transparent 72%),
    var(--ink);
}

.page-about .about-pillar:nth-child(2) {
  background:
    linear-gradient(180deg, rgba(255, 107, 44, 0.07), transparent 72%),
    var(--ink);
}

.page-about .about-pillar:nth-child(3) {
  background:
    linear-gradient(180deg, rgba(139, 123, 255, 0.08), transparent 72%),
    var(--ink);
}

.page-about .about-pillar__num {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-pillar:nth-child(2) .about-pillar__num {
  color: var(--orange);
}

.page-about .about-pillar:nth-child(3) .about-pillar__num {
  color: var(--violet);
}

.page-about .about-pillar h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-pillar p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--about-dim);
}

/* ---------- 内容组织 ---------- */
.page-about .about-craft {
  padding-top: var(--about-pad);
}

.page-about .about-craft__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-craft__text {
  position: relative;
  padding: clamp(22px, 4vw, 42px);
  background: var(--paper);
  color: var(--black);
  border-radius: var(--radius);
  box-shadow: var(--shadow-paper);
}

.page-about .about-craft__text::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 107, 44, 0) 72%);
}

.page-about .about-craft__text .eyebrow {
  color: var(--about-paper-violet);
}

.page-about .about-craft__text h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3vw, 33px);
  line-height: 1.2;
  color: var(--black);
}

.page-about .about-craft__text > p {
  margin: 16px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-paper-ink);
}

.page-about .about-craft__list {
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid rgba(11, 13, 20, 0.14);
}

.page-about .about-craft__list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(11, 13, 20, 0.14);
}

.page-about .about-craft__list dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--about-paper-violet);
}

.page-about .about-craft__list dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-paper-ink);
}

.page-about .about-craft__list .about-link {
  color: var(--about-paper-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 127, 115, 0.45);
}

.page-about .about-craft__list .about-link:hover,
.page-about .about-craft__list .about-link:focus-visible {
  border-bottom-color: var(--about-paper-teal);
}

.page-about .about-craft__figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--ink-3);
}

.page-about .about-craft__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding-top: var(--about-pad);
}

.page-about .about-timeline__figure {
  margin: 28px 0 0;
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--ink-3);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-timeline__list {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 11px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(139, 123, 255, 0.55) 62%, rgba(174, 185, 207, 0.08));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 34px 36px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 6px;
  left: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 220, 0.12);
}

.page-about .about-timeline__item:nth-child(2)::before {
  border-color: var(--violet);
  box-shadow: 0 0 0 4px rgba(139, 123, 255, 0.12);
}

.page-about .about-timeline__item:nth-child(3)::before {
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 44, 0.12);
}

.page-about .about-timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-timeline__item:nth-child(2) .about-timeline__year {
  color: var(--violet);
}

.page-about .about-timeline__item:nth-child(3) .about-timeline__year {
  color: var(--orange);
}

.page-about .about-timeline__item h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-timeline__item p {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--about-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: var(--about-pad);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 30px;
}

.page-about .about-team__card {
  padding: 24px 20px 28px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .about-team__card--checkers {
  border-top-color: var(--violet);
}

.page-about .about-team__card--partners {
  border-top-color: var(--orange);
}

.page-about .about-team__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-team__card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--cyan);
}

.page-about .about-team__card--checkers h3 {
  color: var(--violet);
}

.page-about .about-team__card--partners h3 {
  color: var(--orange);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--about-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .about-network {
  padding-top: var(--about-pad);
}

.page-about .about-network__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-network__item {
  display: grid;
  gap: 9px;
  justify-items: start;
  padding: 24px 22px 28px;
  background: var(--ink);
}

.page-about .about-network__item h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17.5px;
  color: var(--paper);
}

.page-about .about-network__dot {
  flex: none;
  width: 9px;
  height: 9px;
  background: var(--cyan);
}

.page-about .about-network__item:nth-child(2) .about-network__dot {
  background: var(--orange);
}

.page-about .about-network__item:nth-child(3) .about-network__dot {
  background: var(--violet);
}

.page-about .about-network__item:nth-child(4) .about-network__dot {
  background: var(--green);
}

.page-about .about-network__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--about-dim);
}

/* ---------- 联络 ---------- */
.page-about .about-cta {
  padding-top: var(--about-pad);
  padding-bottom: clamp(54px, 8vw, 96px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: clamp(26px, 4vw, 50px);
  border: 1px solid var(--line-cyan);
  background:
    linear-gradient(118deg, rgba(53, 242, 220, 0.1), transparent 58%),
    var(--ink-2);
}

.page-about .about-cta__inner h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.18;
  color: var(--paper);
}

.page-about .about-cta__inner p {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .about-cta__mail {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  word-break: break-word;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-cover__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-craft__list > div {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 780px) {
  .page-about .about-pillars__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: 22px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 44px;
  }

  .page-about .about-network__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.25fr) auto;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-craft__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-craft__figure {
    margin-top: 46px;
  }

  .page-about .about-timeline__item {
    padding-left: 44px;
    padding-bottom: 40px;
  }

  .page-about .about-timeline__list::before {
    left: 17px;
  }

  .page-about .about-timeline__item::before {
    left: 12px;
    top: 8px;
  }

  .page-about .about-timeline__year {
    font-size: 30px;
  }
}
<<<END>>>