.page-about {
  --about-node: 10px;
  --about-tint: rgba(59, 227, 240, 0.14);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 26px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 24px;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1.18;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 18px;
}

.page-about .about-hero__lead p {
  color: var(--text);
  max-width: 44em;
}

.page-about .about-hero__actions {
  margin-top: 24px;
  gap: 12px;
}

.page-about .about-hero__panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard);
  align-self: start;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .about-stat:nth-child(2n) {
  border-right: 0;
}

.page-about .about-stat:nth-child(n + 3) {
  border-bottom: 0;
}

.page-about .about-stat__num {
  font-size: 32px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .about-stat:nth-child(3) .about-stat__num {
  color: var(--magenta);
}

.page-about .about-stat:nth-child(4) .about-stat__num {
  color: var(--amber);
}

.page-about .about-stat__label {
  font-size: 13px;
  color: var(--dim);
  letter-spacing: 0.06em;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline__intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-bottom: 36px;
}

.page-about .about-timeline__intro h2 {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 14px;
}

.page-about .about-timeline__intro p {
  color: var(--text);
  max-width: 40em;
}

.page-about .about-timeline__fig {
  margin: 0;
}

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

.page-about .timeline__item {
  position: relative;
  padding-bottom: 32px;
}

.page-about .timeline__mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .timeline__node {
  width: var(--about-node);
  height: var(--about-node);
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--about-tint);
  flex: none;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .timeline__code {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .timeline__name {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.page-about .timeline__body h3 {
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--bright);
  margin: 0 0 10px;
}

.page-about .timeline__body p {
  color: var(--text);
  max-width: 44em;
  margin: 0 0 8px;
}

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

.page-about .about-timeline__link {
  font-size: 14px;
}

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

.page-about .timeline__item:hover .timeline__code,
.page-about .timeline__item:focus-within .timeline__code {
  color: var(--bright);
}

.page-about .timeline__item:hover .timeline__node,
.page-about .timeline__item:focus-within .timeline__node {
  background: var(--amber);
  box-shadow: 0 0 0 6px rgba(255, 194, 75, 0.16);
}

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

/* ---------- 内容团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-team__grid h2 {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 14px;
}

.page-about .about-team__grid p {
  color: var(--text);
  max-width: 40em;
}

.page-about .about-team__fig {
  margin: 0;
}

.page-about .lane-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: 30px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard);
}

.page-about .lane {
  padding: 24px 22px;
  border-bottom: 2px solid var(--line);
}

.page-about .lane:last-child {
  border-bottom: 0;
}

.page-about .lane__tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink);
  background: var(--cyan);
  padding: 3px 10px;
  margin: 0 0 12px;
}

.page-about .lane__tag--violet {
  background: var(--violet);
  color: var(--bright);
}

.page-about .lane h3 {
  font-family: var(--font-head);
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--bright);
  margin: 0 0 10px;
}

.page-about .lane p {
  color: var(--text);
  margin: 0;
}

/* ---------- 适配实验室 ---------- */
.page-about .about-lab__fig {
  margin: 0 0 32px;
}

.page-about .about-lab__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-lab__grid h2 {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 14px;
}

.page-about .about-lab__grid p {
  color: var(--text);
  max-width: 40em;
}

.page-about .about-lab__link {
  font-size: 14px;
}

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

.page-about .device-matrix {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .device-cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 14px 16px;
  border: 2px solid var(--line);
  background: var(--ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .device-cell:hover,
.page-about .device-cell:focus-within {
  border-color: var(--cyan);
  box-shadow: var(--hard-sm);
}

.page-about .device-cell__bar {
  display: block;
  height: 42px;
  border: 2px solid var(--line);
  background: linear-gradient(180deg, rgba(59, 227, 240, 0.2), rgba(59, 227, 240, 0));
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .device-cell:hover .device-cell__bar {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(59, 227, 240, 0.34), rgba(59, 227, 240, 0.02));
}

.page-about .device-cell:nth-child(1) .device-cell__bar { width: 32%; }
.page-about .device-cell:nth-child(2) .device-cell__bar { width: 46%; }
.page-about .device-cell:nth-child(3) .device-cell__bar { width: 58%; }
.page-about .device-cell:nth-child(4) .device-cell__bar { width: 78%; }
.page-about .device-cell:nth-child(5) .device-cell__bar { width: 86%; }
.page-about .device-cell:nth-child(6) .device-cell__bar { width: 92%; }
.page-about .device-cell:nth-child(7) .device-cell__bar { width: 100%; }
.page-about .device-cell:nth-child(8) .device-cell__bar { width: 66%; }
.page-about .device-cell:nth-child(9) .device-cell__bar { width: 72%; }

.page-about .device-cell__name {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--bright);
}

.page-about .device-cell__spec {
  font-size: 12px;
  line-height: 1.6;
  color: var(--dim);
}

/* ---------- 评分 ---------- */
.page-about .about-score__head {
  margin-bottom: 28px;
}

.page-about .about-score__head h2 {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 14px;
}

.page-about .about-score__head p {
  color: var(--text);
  max-width: 46em;
}

.page-about .score-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .score-card {
  padding: 20px 18px;
  border: 2px solid var(--line);
  border-left: 4px solid var(--cyan);
  background: var(--panel);
}

.page-about .score-card--magenta { border-left-color: var(--magenta); }
.page-about .score-card--amber { border-left-color: var(--amber); }
.page-about .score-card--violet { border-left-color: var(--violet); }

.page-about .score-card__num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--dim);
  margin: 0 0 10px;
}

.page-about .score-card h3 {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--bright);
  margin: 0 0 8px;
}

.page-about .score-card p {
  color: var(--text);
  font-size: 14px;
  margin: 0;
}

.page-about .about-score__note {
  margin-top: 24px;
  color: var(--dim);
  font-size: 14px;
  max-width: 52em;
}

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

/* ---------- 生态与规模 ---------- */
.page-about .about-eco__head {
  margin-bottom: 26px;
}

.page-about .about-eco__head h2 {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 14px;
}

.page-about .about-eco__head p {
  color: var(--text);
  max-width: 42em;
}

.page-about .eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .eco-card {
  padding: 22px 20px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard-sm);
}

.page-about .eco-card__num {
  font-size: 38px;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.03em;
  margin: 0 0 12px;
}

.page-about .eco-card__unit,
.page-about .scale-strip__unit {
  font-size: 0.52em;
  margin-left: 3px;
}

.page-about .eco-card h3 {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--bright);
  margin: 0 0 8px;
}

.page-about .eco-card p {
  color: var(--text);
  font-size: 14px;
  margin: 0;
}

.page-about .scale-strip {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 2px solid var(--line);
  background: var(--ink);
}

.page-about .scale-strip__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .scale-strip__item:nth-child(2n) {
  border-right: 0;
}

.page-about .scale-strip__item:nth-child(n + 3) {
  border-bottom: 0;
}

.page-about .scale-strip__num {
  font-size: 26px;
  line-height: 1;
  color: var(--bright);
  letter-spacing: 0.03em;
}

.page-about .scale-strip__label {
  font-size: 13px;
  color: var(--dim);
  letter-spacing: 0.04em;
}

/* ---------- 接下来一年 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-next__grid h2 {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--bright);
  margin: 12px 0 14px;
}

.page-about .about-next__grid > div > p {
  color: var(--text);
  max-width: 38em;
}

.page-about .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border: 2px solid var(--line);
  background: var(--panel);
}

.page-about .route-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 0 14px;
  padding: 20px 18px;
  border-bottom: 2px solid var(--line);
}

.page-about .route-item:last-child {
  border-bottom: 0;
}

.page-about .route-item__idx {
  grid-row: span 2;
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--violet);
  margin: 0;
}

.page-about .route-item h3 {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--bright);
  margin: 0 0 6px;
}

.page-about .route-item p:not(.route-item__idx) {
  color: var(--text);
  font-size: 14px;
  margin: 0;
}

.page-about .about-cta {
  margin-top: 34px;
  padding: 26px 22px;
  border: 2px solid var(--line);
  border-top: 4px solid var(--amber);
  background: var(--panel);
  display: grid;
  gap: 18px;
}

.page-about .about-cta__text {
  color: var(--bright);
  font-size: 17px;
  margin: 0;
  max-width: 46em;
}

.page-about .about-cta__actions {
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .device-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .scale-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .scale-strip__item {
    border-bottom: 0;
    border-right: 2px solid var(--line);
  }

  .page-about .scale-strip__item:nth-child(2n) {
    border-right: 2px solid var(--line);
  }

  .page-about .scale-strip__item:last-child {
    border-right: 0;
  }
}

@media (min-width: 760px) {
  .page-about .about-hero h1 {
    font-size: 44px;
  }

  .page-about .about-timeline__intro h2,
  .page-about .about-team__grid h2,
  .page-about .about-lab__grid h2,
  .page-about .about-score__head h2,
  .page-about .about-eco__head h2,
  .page-about .about-next__grid h2 {
    font-size: 32px;
  }

  .page-about .score-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .lane {
    border-bottom: 0;
    border-right: 2px solid var(--line);
  }

  .page-about .lane:last-child {
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-timeline__intro {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: end;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: center;
  }

  .page-about .about-lab__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 26px;
  }

  /* 时间轴改为刻度 + 轨道 + 正文三列 */
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 30px;
    padding-bottom: 40px;
  }

  .page-about .timeline__item::before {
    content: "";
    position: absolute;
    left: 9px;
    top: 16px;
    bottom: 0;
    width: 2px;
    background: var(--line);
  }

  .page-about .timeline__item:last-child::before {
    bottom: 42%;
  }

  .page-about .timeline__mark {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 0;
    padding-left: 30px;
  }

  .page-about .timeline__node {
    position: absolute;
    left: 4px;
    top: 5px;
    z-index: 1;
  }

  .page-about .timeline__code {
    font-size: 22px;
    letter-spacing: 0.08em;
    line-height: 1;
  }

  .page-about .timeline__name {
    font-size: 12px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    font-size: 54px;
  }

  .page-about .about-hero__panel {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__node,
  .page-about .device-cell,
  .page-about .device-cell__bar {
    transition: none;
  }
}
<<<END>>>