.page-about {
  --about-sec-gap: clamp(44px, 6vw, 84px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .crumb {
  padding-block: clamp(18px, 3vw, 28px) 0;
}
.page-about .crumb__current {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .team-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(26px, 4.5vw, 54px) clamp(34px, 5vw, 64px);
  border-bottom: 1px solid var(--hairline);
}

.page-about .team-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .team-hero__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  animation: about-pulse 900ms ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% { opacity: .4; transform: scale(.82); }
  50% { opacity: 1; transform: scale(1); }
}

.page-about .team-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.1vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .team-hero__lede {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(233, 255, 249, .82);
}

.page-about .team-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--hairline);
}

.page-about .team-hero__stat {
  padding: 13px 15px 15px;
  background: var(--ink);
}

.page-about .team-hero__stat dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .team-hero__stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.3vw, 23px);
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.page-about .team-hero__stat dd .data-num {
  color: var(--amber);
}

.page-about .team-hero__media {
  margin: 0;
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-print);
}

.page-about .team-hero__media img,
.page-about .squad-media img,
.page-about .archive-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .team-hero__media img {
  aspect-ratio: 3 / 2;
  filter: saturate(.72) contrast(1.06) brightness(.94);
}

.page-about .media__caption {
  padding: 11px 13px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
  background: var(--ink-2);
  border-top: 1px solid var(--hairline);
}

/* ---------- 主体两栏 ---------- */
.page-about .team-body {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-block: clamp(34px, 5vw, 70px) clamp(48px, 6vw, 96px);
}

.page-about .team-nav__cap {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .team-nav__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-nav__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: var(--hairline);
}

.page-about .team-nav__item {
  margin: 0;
}

.page-about .team-nav__link {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 3px;
  padding: 8px 0;
  text-decoration: none;
  color: var(--slate);
  transition: color 180ms ease;
}

.page-about .team-nav__dot {
  grid-area: 1 / 1 / 3 / 2;
  align-self: center;
  justify-self: start;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--hairline-strong);
  background: var(--ink);
  transition: background 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.page-about .team-nav__idx {
  grid-area: 1 / 2;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--slate);
  transition: color 200ms ease;
}

.page-about .team-nav__label {
  grid-area: 2 / 2;
  font-size: 14px;
  line-height: 1.45;
}

.page-about .team-nav__link:hover,
.page-about .team-nav__link:focus-visible {
  color: var(--mist);
  outline: none;
}

.page-about .team-nav__link:hover .team-nav__dot,
.page-about .team-nav__link:focus-visible .team-nav__dot {
  border-color: var(--cyan);
}

.page-about .team-nav__link[data-active] {
  color: var(--mist);
}

.page-about .team-nav__link[data-active] .team-nav__dot {
  background: var(--amber);
  border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(255, 154, 60, .18);
}

.page-about .team-nav__link[data-active] .team-nav__idx {
  color: var(--cyan);
}

.page-about .team-nav__link[data-active] .team-nav__label {
  font-weight: 600;
}

.page-about .team-main {
  display: flex;
  flex-direction: column;
  gap: var(--about-sec-gap);
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  scroll-margin-top: calc(var(--bar-h) + 26px);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-sec__idx {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1;
  color: var(--cyan);
  opacity: .88;
  font-variant-numeric: tabular-nums;
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.1vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-sec__lede {
  margin: 0 0 22px;
  max-width: 66ch;
  padding-left: 15px;
  border-left: 2px solid var(--cyan);
  font-size: 16.5px;
  line-height: 1.74;
  color: rgba(233, 255, 249, .88);
}

.page-about .about-sec__body p {
  margin: 0 0 1.1em;
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(233, 255, 249, .74);
}

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

.page-about .inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--hairline-strong);
  text-underline-offset: 3px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.page-about .inline-link:hover,
.page-about .inline-link:focus-visible {
  color: var(--amber-soft);
  text-decoration-color: var(--amber);
  outline: none;
}

.page-about .about-source {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-deep);
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 02 四个小组 ---------- */
.page-about .squad-layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
}

.page-about .squad-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-about .squad-item {
  padding: 16px 17px 18px;
  border: 1px solid var(--hairline);
  background: var(--ink-2);
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-about .squad-item__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .squad-item__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .01em;
  color: var(--mist);
}

.page-about .squad-item__count {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .squad-item__count::after {
  content: " 人";
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--slate);
}

.page-about .squad-item__bar {
  height: 5px;
  margin-bottom: 12px;
  background: rgba(76, 224, 192, .1);
  overflow: hidden;
}

.page-about .squad-item__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
}

.page-about .squad-item__fill--eng { width: 39%; }
.page-about .squad-item__fill--data { width: 25%; }
.page-about .squad-item__fill--review { width: 20%; }
.page-about .squad-item__fill--member { width: 16%; }

.page-about .squad-item__desc {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(233, 255, 249, .76);
}

.page-about .squad-item__peer {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--hairline);
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--slate);
}

.page-about .squad-media {
  margin: 0;
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-print);
  align-self: start;
}

.page-about .squad-media img {
  aspect-ratio: 3 / 4;
  filter: saturate(.65) contrast(1.08) brightness(.9);
}

/* ---------- 03 三级校验 ---------- */
.page-about .check-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  counter-reset: about-step;
}

.page-about .check-step {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--hairline);
  background: var(--ink-2);
}

.page-about .check-step__idx {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--cyan);
}

.page-about .check-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--mist);
}

.page-about .check-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(233, 255, 249, .74);
}

.page-about .check-step--final {
  border-color: rgba(255, 154, 60, .42);
}

.page-about .check-step--final .check-step__idx {
  background: var(--amber);
}

/* ---------- 04 资料库 ---------- */
.page-about .archive-media {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border: 1px solid var(--hairline);
}

.page-about .archive-media img {
  aspect-ratio: 2 / 1;
  filter: saturate(.7) contrast(1.04) brightness(.92);
}

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

.page-about .archive-card {
  padding: 17px 17px 19px;
  border: 1px solid var(--hairline);
  background: var(--ink-2);
  min-width: 0;
}

.page-about .archive-card__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 30px);
  line-height: 1;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .archive-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}

.page-about .archive-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(233, 255, 249, .72);
}

.page-about .scene-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .scene-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.74;
  color: rgba(233, 255, 249, .8);
}

.page-about .scene-list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: .66em;
  width: 7px;
  height: 7px;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 05 版本阶段 ---------- */
.page-about .version-track {
  display: grid;
  gap: 14px;
}

.page-about .version-card {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--hairline);
  background: var(--ink-2);
  box-shadow: 4px 4px 0 rgba(76, 224, 192, .14), 8px 8px 0 rgba(76, 224, 192, .05);
  min-width: 0;
}

.page-about .version-card__badge {
  display: inline-block;
  margin-bottom: 11px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--cyan);
  border: 1px solid var(--hairline-strong);
}

.page-about .version-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.32;
  color: var(--mist);
}

.page-about .version-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(233, 255, 249, .72);
}

.page-about .version-card--current {
  border-color: rgba(255, 154, 60, .5);
  box-shadow: 4px 4px 0 rgba(255, 154, 60, .22), 8px 8px 0 rgba(255, 154, 60, .07);
}

.page-about .version-card--current .version-card__badge {
  color: var(--ink);
  background: var(--amber);
  border-color: var(--amber);
}

/* ---------- 06 服务区域 ---------- */
.page-about .coverage {
  display: grid;
  gap: 12px;
}

.page-about .coverage-item {
  padding: 18px 18px 20px;
  border: 1px solid var(--hairline);
  background: var(--ink-2);
  border-top-color: var(--cyan-deep);
  min-width: 0;
}

.page-about .coverage-item__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.15;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .coverage-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}

.page-about .coverage-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(233, 255, 249, .72);
}

/* ---------- 07 合作 ---------- */
.page-about .coop-panel {
  position: relative;
  padding: clamp(22px, 3.6vw, 38px);
  border: 1px solid var(--hairline-strong);
  background: linear-gradient(140deg, var(--ink-2) 0%, var(--ink) 72%);
  overflow: hidden;
}

.page-about .coop-panel::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 170px;
  height: 170px;
  border: 1px solid var(--hairline);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .coop-panel__lede {
  position: relative;
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.76;
  color: rgba(233, 255, 249, .88);
}

.page-about .coop-list {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .coop-list li {
  padding: 7px 13px;
  border: 1px solid var(--hairline);
  background: var(--ink);
  font-size: 14px;
  letter-spacing: .02em;
  color: rgba(233, 255, 249, .86);
}

.page-about .coop-panel__text {
  position: relative;
  margin: 0 0 22px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(233, 255, 249, .74);
}

.page-about .coop-panel .btn {
  position: relative;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .team-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .check-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .check-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -19px;
    width: 19px;
    height: 0;
    border-top: 1px dashed var(--hairline-strong);
    transform: translateY(-50%);
    pointer-events: none;
  }
}

@media (min-width: 860px) {
  .page-about .version-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }
}

@media (min-width: 900px) {
  .page-about .team-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: center;
  }

  .page-about .squad-layout {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .team-body {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .team-nav {
    position: sticky;
    top: calc(var(--bar-h) + 26px);
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .squad-item:hover {
    border-color: var(--hairline-strong);
    transform: translateX(3px);
  }
}

@media (max-width: 480px) {
  .page-about .about-sec__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .squad-item__head {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-hero__pulse {
    animation: none;
  }

  .page-about .squad-item,
  .page-about .team-nav__link,
  .page-about .inline-link,
  .page-about .team-nav__dot {
    transition: none;
  }
}
<<<END>>>