.page-about {
  --about-panel: rgba(16, 32, 41, 0.72);
  --about-glow: rgba(61, 245, 208, 0.16);
  --about-hair: 1px solid var(--slate-700);
  background: var(--night-950);
  color: var(--mist-050);
  padding-bottom: clamp(56px, 9vw, 104px);
  overflow-x: clip;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--fog-300);
  margin-bottom: clamp(14px, 2.5vw, 22px);
}

.page-about .about-hero__frame {
  position: relative;
  border: var(--about-hair);
  border-radius: var(--radius-l);
  padding: clamp(20px, 4vw, 44px);
  background:
    radial-gradient(120% 96% at 88% 0%, rgba(11, 143, 125, 0.34), transparent 62%),
    linear-gradient(158deg, var(--pitch-950) 0%, var(--night-950) 58%, #0a1720 100%);
  overflow: hidden;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: 1px solid var(--cyan-400);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: 14px;
  left: 14px;
  border-right: 0;
  border-bottom: 0;
  border-radius: 8px 0 0 0;
}

.page-about .about-hero__frame::after {
  right: 14px;
  bottom: 14px;
  border-top: 0;
  border-left: 0;
  border-radius: 0 0 8px 0;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(30px, 7.4vw, 58px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 10px 0 16px;
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: 0 0 22px;
  font-size: clamp(14px, 3.6vw, 16px);
  line-height: 1.78;
  color: var(--fog-300);
  max-width: 48ch;
}

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

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

.page-about .about-hero__kpi li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  border: var(--about-hair);
  border-radius: var(--radius-m);
  background: var(--about-panel);
}

.page-about .about-hero__kpi .num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 28px);
  font-weight: 700;
  color: var(--cyan-400);
  letter-spacing: -0.01em;
}

.page-about .about-hero__kpi-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fog-300);
}

.page-about .about-hero__figure {
  margin: clamp(20px, 4vw, 32px) 0 0;
  border: var(--about-hair);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 34vw, 320px);
  object-fit: cover;
}

/* ---------- 分屏骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(34px, 6vw, 68px);
}

.page-about .about-rail {
  border-top: 1px solid var(--cyan-700);
  padding-top: 12px;
}

.page-about .about-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fog-300);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 12px;
  border: var(--about-hair);
  border-radius: 999px;
  font-size: 13px;
  color: var(--fog-300);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--cyan-400);
  color: var(--mist-050);
  background: rgba(61, 245, 208, 0.1);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan-400);
}

.page-about .about-rail__foot {
  display: none;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(24px, 5vw, 52px);
  border-top: var(--about-hair);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-about .about-chapter__title {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(24px, 5.4vw, 38px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: 0.01em;
}

.page-about .about-chapter__text {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--fog-300);
  max-width: 62ch;
}

.page-about .about-chapter__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-700);
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog-300);
}

/* ---------- 版本时间线 ---------- */
.page-about .vtimeline {
  margin-top: 24px;
  padding-left: 14px;
  border-left: 1px solid var(--slate-700);
}

.page-about .vnode {
  position: relative;
  border: var(--about-hair);
  border-radius: var(--radius-m);
  background: var(--slate-850);
  margin-bottom: 10px;
  overflow: hidden;
}

.page-about .vnode::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 21px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--slate-700);
  border: 1px solid var(--night-950);
  transition: background 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .vnode[open]::before {
  background: var(--cyan-400);
  box-shadow: 0 0 0 4px var(--about-glow);
}

.page-about .vnode[open] {
  border-color: var(--cyan-700);
}

.page-about .vnode__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .vnode__ver {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan-400);
  letter-spacing: 0.04em;
}

.page-about .vnode__name {
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.5;
  color: var(--mist-050);
}

.page-about .vnode__sign {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--fog-300);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .vnode[open] .vnode__sign {
  transform: rotate(45deg);
  color: var(--cyan-400);
}

.page-about .vnode__body {
  padding: 0 16px 16px;
}

.page-about .vnode__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fog-300);
}

/* ---------- 团队职能切换 ---------- */
.page-about .team-tabs {
  position: relative;
  margin-top: 24px;
}

.page-about .team-tabinput {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .team-tabinput:focus-visible ~ .team-tablist .team-tab {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-about .team-tablist {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 14px;
  scrollbar-width: thin;
}

.page-about .team-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 16px;
  border: var(--about-hair);
  border-radius: 999px;
  background: var(--slate-850);
  color: var(--fog-300);
  font-size: 14px;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .team-tab:hover {
  border-color: var(--cyan-700);
  color: var(--mist-050);
}

.page-about .team-tab .num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan-400);
}

.page-about #tt-content:checked ~ .team-tablist .team-tab[for="tt-content"],
.page-about #tt-tech:checked ~ .team-tablist .team-tab[for="tt-tech"],
.page-about #tt-service:checked ~ .team-tablist .team-tab[for="tt-service"] {
  border-color: var(--cyan-400);
  background: rgba(61, 245, 208, 0.14);
  color: var(--mist-050);
}

.page-about .team-panels .team-panel {
  display: none;
  border: var(--about-hair);
  border-radius: var(--radius-m);
  padding: clamp(16px, 3vw, 26px);
  background: linear-gradient(160deg, var(--slate-850) 0%, var(--pitch-950) 100%);
}

.page-about #tt-content:checked ~ .team-panels .team-panel--content,
.page-about #tt-tech:checked ~ .team-panels .team-panel--tech,
.page-about #tt-service:checked ~ .team-panels .team-panel--service {
  display: block;
}

.page-about .team-panel__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 30px);
  font-weight: 700;
  color: var(--cyan-400);
}

.page-about .team-panel__role {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog-300);
}

.page-about .team-panel ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.page-about .team-panel li {
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist-050);
  margin-bottom: 8px;
}

.page-about .team-panel li:last-child {
  margin-bottom: 0;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(20px, 4vw, 30px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: clamp(200px, 38vw, 360px);
  object-fit: cover;
  border: var(--about-hair);
  border-radius: var(--radius-m);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--fog-300);
}

/* ---------- 更新批次 ---------- */
.page-about .batches {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .batches__item {
  border: var(--about-hair);
  border-left: 3px solid var(--cyan-700);
  border-radius: var(--radius-m);
  padding: 16px 18px;
  background: var(--slate-850);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .batches__item:hover {
  transform: translateY(-2px);
  border-left-color: var(--cyan-400);
}

.page-about .batches__time {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--amber-300);
}

.page-about .batches__title {
  margin: 6px 0 8px;
  font-family: var(--font-heading);
  font-size: clamp(18px, 4vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--mist-050);
}

.page-about .batches__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog-300);
}

/* ---------- 数据卡 ---------- */
.page-about .datacards {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .datacards li {
  border: var(--about-hair);
  border-radius: var(--radius-m);
  padding: 16px;
  background: var(--pitch-950);
}

.page-about .datacards .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.6vw, 28px);
  font-weight: 700;
  color: var(--cyan-400);
  letter-spacing: -0.01em;
}

.page-about .datacards__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog-300);
}

/* ---------- 合作生态 ---------- */
.page-about .eco {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .eco__item {
  border: var(--about-hair);
  border-radius: var(--radius-l);
  padding: 18px 20px;
  background: linear-gradient(150deg, var(--slate-850) 0%, rgba(7, 23, 19, 0.9) 100%);
}

.page-about .eco__item--award {
  border-color: rgba(255, 198, 92, 0.5);
  background: linear-gradient(150deg, rgba(255, 198, 92, 0.1) 0%, var(--slate-850) 70%);
}

.page-about .eco__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .eco__item--award .eco__num {
  color: var(--amber-300);
}

.page-about .eco__title {
  margin: 10px 0 8px;
  font-family: var(--font-heading);
  font-size: clamp(18px, 4vw, 22px);
  font-weight: 700;
  line-height: 1.3;
}

.page-about .eco__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog-300);
}

/* ---------- 服务区域 ---------- */
.page-about .reach {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .reach__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  border: var(--about-hair);
  border-radius: var(--radius-m);
  background: var(--about-panel);
}

.page-about .reach__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4.6vw, 26px);
  font-weight: 700;
  color: var(--cyan-400);
}

.page-about .reach__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fog-300);
}

.page-about .about-chapter .link-arrow {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 245, 208, 0.4);
  padding-bottom: 1px;
}

.page-about .about-chapter .link-arrow:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 尾段 CTA ---------- */
.page-about .about-cta {
  margin-top: clamp(32px, 6vw, 64px);
  border: var(--about-hair);
  border-radius: var(--radius-l);
  padding: clamp(22px, 4vw, 40px);
  background:
    radial-gradient(120% 130% at 6% 0%, rgba(255, 91, 46, 0.18), transparent 62%),
    var(--pitch-950);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.18;
}

.page-about .about-cta p {
  margin: 12px 0 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog-300);
  max-width: 54ch;
}

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

/* ---------- 窄屏微调 ---------- */
@media (max-width: 359px) {
  .page-about .about-hero__kpi li {
    gap: 6px;
  }

  .page-about .reach__item {
    flex-direction: column;
    gap: 4px;
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.95fr);
    align-items: end;
  }

  .page-about .about-hero__kpi li {
    justify-content: space-between;
  }

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

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

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

  .page-about .reach__item {
    flex-direction: column;
    gap: 6px;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    border-color: transparent;
    border-radius: var(--radius-s);
    padding: 9px 10px;
    white-space: normal;
    width: 100%;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-color: var(--slate-700);
  }

  .page-about .about-rail__foot {
    display: block;
    margin: 16px 0 0;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--fog-300);
  }
}

```