.page-about {
  --about-col-gap: clamp(24px, 3.4vw, 48px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(28px, 5vw, 60px) clamp(24px, 4vw, 44px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.page-about .about-stat {
  padding: 16px 14px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background var(--ease);
}

.page-about .about-stat:hover {
  background: var(--ink-800);
}

.page-about .about-stat .stat-num {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat:nth-child(2) .stat-num,
.page-about .about-stat:nth-child(3) .stat-num {
  color: var(--cyan);
}

.page-about .about-stat .stat-label {
  font-size: 13px;
  letter-spacing: 0.04em;
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: end;
  }

  .page-about .about-hero-stats {
    margin-bottom: 4px;
  }
}

/* ---------- 起点 ---------- */
.page-about .about-origin-side {
  align-self: start;
}

.page-about .about-fact-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-fact-list li {
  position: relative;
  padding: 11px 0 11px 20px;
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-fact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 历程时间轴 ---------- */
.page-about .about-timeline {
  margin-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 22px 0 22px 18px;
  border-bottom: 1px solid var(--line);
  transition: background var(--ease);
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 2px;
  background: var(--line-strong);
  transition: background var(--ease);
}

.page-about .about-tl-item:hover,
.page-about .about-tl-item:focus-within {
  background: var(--ink-800);
}

.page-about .about-tl-item:hover::before,
.page-about .about-tl-item:focus-within::before {
  background: var(--cyan);
}

.page-about .about-tl-mark {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl-body p {
  margin: 8px 0 0;
  max-width: 62ch;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-tl-body .h3 {
  margin: 0;
}

@media (min-width: 820px) {
  .page-about .about-tl-item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 28px;
    padding: 26px 20px 26px 22px;
    align-items: start;
  }

  .page-about .about-tl-mark {
    padding-top: 4px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team-visual {
  margin: 0 0 clamp(24px, 3vw, 36px);
}

.page-about .about-team-table {
  border-top: 1px solid var(--line-strong);
}

.page-about .about-team-head,
.page-about .about-team-row {
  display: grid;
  gap: 6px;
  padding: 16px 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team-head {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  background: var(--ink-700);
}

.page-about .about-team-row {
  transition: background var(--ease);
}

.page-about .about-team-row:hover {
  background: var(--ink-800);
}

.page-about .about-team-role {
  font-weight: 600;
  color: var(--text);
  font-size: 16px;
}

.page-about .about-team-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-about .about-team-desc {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
}

@media (min-width: 900px) {
  .page-about .about-team-head,
  .page-about .about-team-row {
    grid-template-columns: minmax(0, 220px) 88px minmax(0, 1fr);
    column-gap: 26px;
    align-items: baseline;
    padding: 18px 22px;
  }
}

/* ---------- 每周节奏 ---------- */
.page-about .about-cadence-grid {
  margin-top: clamp(20px, 3vw, 32px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cadence-item {
  background: var(--ink-900);
  padding: 22px 20px 24px;
  transition: background var(--ease);
}

.page-about .about-cadence-item:hover {
  background: var(--ink-800);
}

.page-about .about-cadence-time {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-cadence-item .h3 {
  margin: 0;
}

.page-about .about-cadence-item p:last-child {
  margin: 10px 0 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
}

@media (min-width: 760px) {
  .page-about .about-cadence-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .about-cadence-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-push-row {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-about .about-push-row .eyebrow {
  margin: 0;
}

/* ---------- 版本轨道 ---------- */
.page-about .about-version-track {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-version-item {
  min-width: min(300px, 78vw);
  padding: 22px 20px 26px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  transition: border-color var(--ease), background var(--ease);
}

.page-about .about-version-item:hover {
  border-color: var(--cyan);
  background: var(--ink-700);
}

.page-about .about-version-mark {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .about-version-item .h3 {
  margin: 0;
}

.page-about .about-version-item p:last-child {
  margin: 12px 0 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.82;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners-grid {
  align-items: center;
}

.page-about .about-partners-visual {
  margin: 0;
}

/* ---------- 服务与联系 ---------- */
.page-about .about-service-grid {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-service-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-service-value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--cyan);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

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

.page-about .about-versions-visual {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* ---------- 尾部引导 ---------- */
.page-about .about-next-panel {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 42px) clamp(20px, 3.4vw, 40px);
  border: 1px solid var(--line-strong);
  background: linear-gradient(120deg, var(--ink-800) 0%, var(--ink-900) 62%);
}

.page-about .about-next-panel .h2 {
  margin-top: 10px;
}

.page-about .about-next-panel p {
  margin: 12px 0 0;
  max-width: 58ch;
  color: var(--text-soft);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

@media (min-width: 900px) {
  .page-about .about-next-panel {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.85fr);
    align-items: center;
  }

  .page-about .about-next-actions {
    justify-content: flex-end;
  }
}