.page-about {
  --about-band: clamp(56px, 8vw, 112px);
  --about-gap: clamp(16px, 2.2vw, 28px);
}

/* ---------- 版面骨架 ---------- */
.page-about .about-shell {
  width: min(1240px, 100% - 36px);
  margin-inline: auto;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 36px);
  flex-wrap: wrap;
}

.page-about .about-block {
  padding-block: var(--about-band);
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  max-width: 880px;
}

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

.page-about .about-head-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(26px, 4.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-head-lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-rule {
  display: block;
  width: min(240px, 56%);
  height: 2px;
  margin-top: 26px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--violet), var(--blue));
}

/* ---------- 开场 ---------- */
.page-about .about-intro {
  padding-block: clamp(18px, 3vw, 34px) clamp(28px, 4vw, 48px);
}

.page-about .about-title {
  margin: 14px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(32px, 6.2vw, 86px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--text);
}

.page-about .about-lede {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.1vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-kpis {
  list-style: none;
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-kpi {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: var(--layer);
}

.page-about .about-kpi-num {
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--cyan);
}

.page-about .about-kpi-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-hero-figure {
  margin: 0 0 clamp(8px, 2vw, 20px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--layer);
}

.page-about .about-hero-figure img,
.page-about .about-version-figure img,
.page-about .about-team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 模块 ---------- */
.page-about .about-modules {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-module {
  position: relative;
  padding: 24px 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--layer);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-module::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(63, 224, 208, 0.07), transparent 58%);
  opacity: 0;
  transition: opacity 0.22s var(--ease);
}

.page-about .about-module:hover {
  border-color: rgba(63, 224, 208, 0.42);
  transform: translateY(-2px);
}

.page-about .about-module:hover::after {
  opacity: 1;
}

.page-about .about-module-key {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .about-module-title {
  margin: 12px 0 0;
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-module-text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-module-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.35);
  padding-bottom: 2px;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-module-link:hover {
  color: var(--text);
  border-bottom-color: var(--cyan);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 clamp(26px, 3.4vw, 40px) 28px;
  border-left: 1px solid var(--line);
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 208, 0.14);
  transition: box-shadow 0.2s var(--ease);
}

.page-about .about-tl-item:hover::before {
  box-shadow: 0 0 0 7px rgba(63, 224, 208, 0.16);
}

.page-about .about-tl-item[data-stage="current"]::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 47, 0.18);
}

.page-about .about-tl-item[data-stage="current"]:hover::before {
  box-shadow: 0 0 0 8px rgba(255, 122, 47, 0.2);
}

.page-about .about-tl-gen {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-tl-item[data-stage="current"] .about-tl-gen {
  color: var(--orange);
}

.page-about .about-tl-title {
  margin: 8px 0 0;
  font-size: clamp(19px, 2vw, 26px);
  font-weight: 500;
  line-height: 1.35;
  color: var(--text);
}

.page-about .about-tl-text {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-tl-add {
  margin: 14px 0 0;
  max-width: 68ch;
  padding: 11px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--glass);
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-tl-add b {
  margin-right: 8px;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .about-tl-item[data-stage="current"] .about-tl-add b {
  color: var(--orange);
}

.page-about .about-version-figure {
  margin: clamp(30px, 4vw, 52px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--layer);
}

/* ---------- 数据运营 ---------- */
.page-about .about-ops {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-aside {
  position: relative;
  padding-left: 16px;
}

.page-about .about-aside::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  bottom: 2px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--violet), var(--blue));
}

.page-about .about-aside-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .about-aside-note {
  margin: 12px 0 0;
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-aside-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.35);
}

.page-about .about-aside-link:hover {
  color: var(--text);
}

.page-about .about-ops-list {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-ops-item {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  background: var(--layer);
  transition: background 0.18s var(--ease);
}

.page-about .about-ops-item:hover {
  background: #101c3a;
}

.page-about .about-ops-key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-ops-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 团队 ---------- */
.page-about .about-team-wrap {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-team-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  background: var(--layer);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-team-cap {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-team-table th,
.page-about .about-team-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team-table thead th {
  background: var(--glass-solid);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-team-table tbody th {
  color: var(--cyan);
  font-weight: 600;
}

.page-about .about-team-table tbody td {
  color: var(--text);
}

.page-about .about-team-table tbody tr {
  transition: background 0.18s var(--ease);
}

.page-about .about-team-table tbody tr:hover {
  background: rgba(63, 224, 208, 0.06);
}

.page-about .about-team-table tbody tr:last-child th,
.page-about .about-team-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-team-side {
  display: grid;
  gap: var(--about-gap);
  align-content: start;
}

.page-about .about-board {
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
}

.page-about .about-board-num {
  margin: 0;
  font-size: clamp(52px, 7vw, 84px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-board-num span {
  margin-left: 8px;
  font-size: 0.24em;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-board-label {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-board-note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-team-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--layer);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-eco-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(122, 92, 255, 0.1), rgba(46, 123, 255, 0.03) 60%, transparent);
  transition: border-color 0.2s var(--ease);
}

.page-about .about-eco-card:hover {
  border-color: rgba(122, 92, 255, 0.5);
}

.page-about .about-eco-num {
  margin: 0;
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-eco-label {
  margin: 12px 0 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-eco-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-aside--wide {
  margin-top: clamp(28px, 4vw, 44px);
  max-width: 760px;
}

/* ---------- 服务地区 ---------- */
.page-about .about-reach {
  border-top: 1px solid var(--line);
}

.page-about .about-reach-panel {
  position: relative;
  padding: clamp(28px, 4vw, 52px) clamp(22px, 3.4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 130% at 8% 0%, rgba(63, 224, 208, 0.12), transparent 60%),
    radial-gradient(70% 120% at 100% 100%, rgba(255, 122, 47, 0.1), transparent 62%),
    var(--layer);
  overflow: hidden;
}

.page-about .about-reach-text {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-cta-row {
  margin-top: clamp(22px, 3vw, 34px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-ops-item {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-ops {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
  }

  .page-about .about-team-wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(24px, 3vw, 44px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    width: min(1240px, 100% - 64px);
  }

  .page-about .about-modules {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-module:nth-child(1) {
    grid-column: span 5;
  }

  .page-about .about-module:nth-child(2) {
    grid-column: span 7;
  }

  .page-about .about-module:nth-child(3) {
    grid-column: span 7;
  }

  .page-about .about-module:nth-child(4) {
    grid-column: span 5;
  }

  .page-about .about-timeline {
    max-width: 940px;
  }

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

  .page-about .about-head-title {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-module,
  .page-about .about-eco-card,
  .page-about .about-module::after,
  .page-about .about-tl-item::before {
    transition: none;
  }

  .page-about .about-module:hover {
    transform: none;
  }
}