.page-about {
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-about .hy-section + .hy-section {
  margin-top: clamp(56px, 9vw, 104px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 40px);
  display: grid;
  gap: 18px;
}

.page-about .about-kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--paper-100);
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--slate-400);
}

.page-about .about-stats {
  margin-top: clamp(26px, 4.5vw, 44px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--mist-600);
  border: 1px solid var(--mist-600);
}

.page-about .about-stats__item {
  background: var(--ink-900);
  padding: 18px 16px 20px;
}

.page-about .about-stats__value {
  display: block;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

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

/* ---------- 时间轴 ---------- */

.page-about .about-figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
}

.page-about .about-figure--matrix,
.page-about .about-figure--team {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  position: relative;
}

.page-about .about-stage {
  position: relative;
  border-left: 2px solid var(--mist-600);
  padding-left: 18px;
}

.page-about .about-stage__year {
  display: block;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  margin-bottom: 8px;
}

.page-about .about-stage__body {
  display: grid;
  gap: 10px;
  justify-items: start;
}

.page-about .about-stage__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 23px);
  letter-spacing: 0.03em;
  color: var(--paper-100);
}

.page-about .about-stage__text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate-400);
}

@media (min-width: 860px) {
  .page-about .about-timeline {
    padding-left: 200px;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 168px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan-400) 0%, rgba(63, 240, 228, 0.06) 100%);
  }

  .page-about .about-stage {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .about-stage::before {
    content: "";
    position: absolute;
    left: calc(-200px + 168px - 5px);
    top: 9px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--ink-900);
    border: 2px solid var(--cyan-400);
  }

  .page-about .about-stage__year {
    position: absolute;
    left: -200px;
    top: 0;
    width: 150px;
    text-align: right;
    font-size: 26px;
    margin-bottom: 0;
  }
}

/* ---------- 矩阵入口 ---------- */

.page-about .about-matrix {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
  border-top: 1px dashed rgba(63, 240, 228, 0.32);
  padding-top: clamp(20px, 3vw, 30px);
}

.page-about .about-entry {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-entry__role {
  margin: 2px 0 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(42, 54, 112, 0.85);
  font-size: 13px;
  line-height: 1.6;
  color: var(--cyan-400);
  letter-spacing: 0.02em;
}

.page-about .about-entry:hover .hy-card__title,
.page-about .about-entry:focus-within .hy-card__title {
  color: var(--cyan-400);
}

@media (min-width: 1080px) {
  .page-about .about-matrix {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-matrix > *:nth-child(2),
  .page-about .about-matrix > *:nth-child(4) {
    margin-top: 26px;
  }

  .page-about .about-matrix > *:nth-child(5) {
    margin-top: 52px;
  }
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: clamp(24px, 4vw, 36px);
}

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

.page-about .about-role {
  border: var(--line);
  background: var(--panel);
}

.page-about .about-role__summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 44px 16px 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "name count"
    "track track";
  gap: 10px 14px;
  align-items: center;
}

.page-about .about-role__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-role__summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .about-role[open] .about-role__summary::after {
  content: "–";
}

.page-about .about-role__name {
  grid-area: name;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--paper-100);
}

.page-about .about-role__count {
  grid-area: count;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

.page-about .about-role__track {
  grid-area: track;
  display: block;
  height: 6px;
  background: var(--indigo-800);
  border: 1px solid var(--mist-600);
  overflow: hidden;
}

.page-about .about-role__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-400) 0%, rgba(63, 240, 228, 0.35) 100%);
}

.page-about .about-role:nth-of-type(1) .about-role__fill { width: 38%; }
.page-about .about-role:nth-of-type(2) .about-role__fill { width: 21%; }
.page-about .about-role:nth-of-type(3) .about-role__fill { width: 24%; }
.page-about .about-role:nth-of-type(4) .about-role__fill { width: 17%; }

.page-about .about-role__body {
  padding: 4px 16px 18px;
  border-top: 1px dashed rgba(42, 54, 112, 0.85);
}

.page-about .about-role__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-role__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-400);
}

.page-about .about-role__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 1px;
  background: var(--cyan-400);
}

@media (min-width: 720px) {
  .page-about .about-role__summary {
    grid-template-columns: 150px minmax(0, 1fr) 64px;
    grid-template-areas: "name track count";
  }
}

@media (min-width: 1000px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-figure--team {
    margin-top: 0;
  }
}

/* ---------- 测试体系 ---------- */

.page-about .about-tests {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-test {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-test .hy-badge {
  justify-self: start;
}

/* ---------- 覆盖规模 ---------- */

.page-about .about-reach {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--mist-600);
  border: 1px solid var(--mist-600);
}

.page-about .about-reach__cell {
  background: linear-gradient(160deg, rgba(16, 26, 61, 0.98) 0%, rgba(7, 12, 31, 0.98) 100%);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-reach__value {
  display: block;
  font-size: clamp(28px, 4.4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange-500);
}

.page-about .about-reach__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.05em;
  color: var(--paper-100);
}

.page-about .about-reach__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-400);
}

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

/* ---------- 合作生态 ---------- */

.page-about .about-partners {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-partners__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
  max-width: 62ch;
}

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

.page-about .about-partners__aside {
  border-left: 2px solid var(--cyan-400);
  padding: 6px 0 6px 18px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-partners__aside .hy-badge {
  justify-self: start;
}

.page-about .about-partners__note {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-100);
  letter-spacing: 0.02em;
}

.page-about .about-partners__note:last-child {
  margin-bottom: 0;
}

@media (min-width: 940px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  margin-top: clamp(56px, 9vw, 104px);
}

.page-about .about-next__inner {
  position: relative;
  border: var(--line);
  background: linear-gradient(135deg, rgba(26, 17, 64, 0.92) 0%, rgba(7, 12, 31, 0.96) 100%);
  padding: clamp(24px, 4vw, 44px);
  display: grid;
  gap: 14px;
  overflow: hidden;
}

.page-about .about-next__inner::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(63, 240, 228, 0.16) 0%, rgba(63, 240, 228, 0) 70%);
  pointer-events: none;
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 34px);
  letter-spacing: 0.03em;
  color: var(--paper-100);
}

.page-about .about-next__text {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-about .about-next__actions {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__actions .hy-button {
  text-decoration: none;
}
<<<END>>>