.page-about {
  --about-soft: rgba(27, 69, 102, 0.32);
  --about-edge: rgba(43, 76, 111, 0.9);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 24px;
  padding-bottom: 8px;
}

.page-about .hero-split {
  display: grid;
  gap: 32px;
}

.page-about .hero-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
}

.page-about .hero-mark__from {
  color: var(--cool);
}

.page-about .hero-mark__to {
  color: var(--orange);
  font-weight: 700;
}

.page-about .hero-mark__track {
  position: relative;
  flex: 1 1 auto;
  max-width: 160px;
  height: 1px;
  background: linear-gradient(90deg, var(--cool), var(--cyan) 62%, var(--orange));
}

.page-about .hero-mark__track::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -3px;
  width: 7px;
  height: 7px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .hero-copy h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--warm);
  max-width: 20ch;
}

.page-about .hero-copy .lede {
  max-width: 58ch;
  color: var(--mist);
}

.page-about .hero-copy .body-text {
  margin-top: 16px;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-ledger {
  border: 1px solid var(--about-edge);
  background:
    linear-gradient(180deg, var(--about-soft), rgba(7, 20, 38, 0) 82%),
    repeating-linear-gradient(0deg, transparent 0 27px, rgba(43, 76, 111, 0.28) 27px 28px);
  padding: 20px;
}

.page-about .ledger-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

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

.page-about .ledger-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .ledger-row:last-child {
  border-bottom: 0;
  padding-bottom: 2px;
}

.page-about .ledger-row dt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  max-width: 16em;
}

.page-about .ledger-row dd {
  margin: 0;
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cool);
}

.page-about .ledger-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--cyan);
  margin-right: 2px;
}

.page-about .ledger-num--warm {
  color: var(--orange);
}

/* ---------- 起点与方向 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-about .origin-main .body-text + .body-text {
  margin-top: 16px;
}

.page-about .origin-aside {
  border-left: 1px solid var(--line);
  padding-left: 18px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .aside-note {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-edge);
}

.page-about .aside-note__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cool);
}

.page-about .aside-note__v {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--warm);
}

.page-about .aside-foot {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 版本演进 ---------- */
.page-about .evo .evo-head .lede {
  max-width: 64ch;
}

.page-about .evo-frame {
  margin-top: 28px;
  border: 1px solid var(--about-edge);
}

.page-about .evo-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .evo .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cool);
}

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cool) 0%, var(--mist) 38%, var(--cyan) 74%, var(--orange) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 38px;
  padding-bottom: 26px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 13px;
  background: var(--deep);
  border: 1px solid var(--cool);
}

.page-about .tl-item--new::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 230, 210, 0.14);
}

.page-about .tl-item--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 60, 0.16);
}

.page-about .tl-meta {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cool);
}

.page-about .tl-item--new .tl-meta {
  color: var(--cyan);
}

.page-about .tl-item--now .tl-meta {
  color: var(--orange);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.4;
  color: var(--warm);
}

.page-about .tl-item p.body-text {
  margin: 0;
  font-size: 15px;
  max-width: 62ch;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .team-card {
  position: relative;
  border: 1px solid var(--about-edge);
  background: linear-gradient(160deg, var(--panel), rgba(7, 20, 38, 0.4));
  padding: 20px 20px 22px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .team-idx {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 3px;
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--warm);
}

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

/* ---------- 协作网络 ---------- */
.page-about .net-block {
  display: grid;
  gap: 28px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.page-about .net-copy h3 {
  margin: 0 0 12px;
  font-size: 22px;
  color: var(--warm);
}

.page-about .net-copy .body-text + .body-text {
  margin-top: 14px;
}

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

.page-about .net-item {
  position: relative;
  padding: 0 0 22px 34px;
}

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

.page-about .net-item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .net-item:last-child::before {
  bottom: auto;
  height: 20px;
}

.page-about .net-item::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--deep);
  border: 1px solid var(--mist);
  border-radius: 50%;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .net-item:hover::after,
.page-about .net-item:focus-within::after {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .net-tag {
  display: inline-block;
  margin-bottom: 6px;
  padding: 1px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid rgba(34, 230, 210, 0.42);
}

.page-about .net-item strong {
  display: block;
  font-size: 16px;
  color: var(--warm);
  margin-bottom: 4px;
}

.page-about .net-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
  max-width: 46ch;
}

/* ---------- 适配 ---------- */
.page-about .adapt-grid {
  display: grid;
  gap: 30px;
}

.page-about .adapt-media .media-frame {
  border: 1px solid var(--about-edge);
}

.page-about .adapt-media img,
.page-about .section-media-row img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .adapt-media .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cool);
}

.page-about .adapt-copy .section-title {
  margin-top: 8px;
}

.page-about .adapt-copy .body-text + .body-text {
  margin-top: 14px;
}

.page-about .adapt-stats {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .stat-cell {
  background: var(--deep);
  padding: 16px 18px;
}

.page-about .stat-cell dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cool);
  margin-bottom: 6px;
}

.page-about .stat-cell dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--warm);
}

.page-about .stat-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
  margin-right: 2px;
}

/* ---------- 资质 ---------- */
.page-about .honor-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 62rem;
}

.page-about .honor-item {
  padding: 20px 0 20px 18px;
  border-left: 2px solid var(--line);
  border-bottom: 1px solid var(--about-edge);
  transition: border-left-color var(--dur) var(--ease);
}

.page-about .honor-item:hover {
  border-left-color: var(--cyan);
}

.page-about .honor-meta {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cool);
}

.page-about .honor-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--warm);
}

.page-about .honor-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 56ch;
}

/* ---------- 场景 ---------- */
.page-about .scene-grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .scene-card {
  border: 1px solid var(--about-edge);
  border-top: 2px solid var(--mist);
  background: var(--about-soft);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-top-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .scene-card:hover,
.page-about .scene-card:focus-within {
  border-top-color: var(--orange);
  background: rgba(27, 69, 102, 0.5);
}

.page-about .scene-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cool);
}

.page-about .scene-card h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.4;
  color: var(--warm);
}

.page-about .scene-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  flex: 1 1 auto;
}

.page-about .scene-link {
  align-self: flex-start;
  margin-top: 6px;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 230, 210, 0.42);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .scene-link:hover,
.page-about .scene-link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .section-media-row {
  margin-top: 32px;
}

.page-about .section-media-row .media-frame {
  border: 1px solid var(--about-edge);
}

.page-about .section-media-row .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cool);
}

/* ---------- 收束 CTA ---------- */
.page-about .about-cta {
  margin-top: 34px;
  padding: 26px 22px;
  border: 1px solid var(--about-edge);
  border-left: 3px solid var(--orange);
  background: linear-gradient(120deg, rgba(255, 122, 60, 0.08), rgba(7, 20, 38, 0) 62%);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.32;
  color: var(--warm);
}

.page-about .about-cta p {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

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

  .page-about .about-cta {
    padding: 34px 30px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .hero-split {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.88fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 0.82fr);
    gap: 48px;
  }

  .page-about .origin-aside {
    padding-left: 26px;
    position: sticky;
    top: calc(var(--gutter) + 24px);
  }

  .page-about .adapt-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .net-block {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .team-card:nth-child(even) {
    margin-top: 26px;
  }

  .page-about .tl-item {
    padding-left: 46px;
  }

  .page-about .honor-item {
    padding-left: 24px;
  }
}

@media (min-width: 1080px) {
  .page-about .tl {
    margin-top: 40px;
    padding-left: 8px;
  }

  .page-about .tl-title {
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .scene-card,
  .page-about .honor-item,
  .page-about .net-item::after {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within {
    transform: none;
  }
}
<<<END>>>