.page-about {
  --about-rail: 250px;
  --about-gap: clamp(28px, 5vw, 64px);
}

.page-about .about-crumbs {
  padding-top: clamp(18px, 4vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 5vw, 46px) 0 clamp(38px, 7vw, 74px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero-copy {
  min-width: 0;
  max-width: 46ch;
}

.page-about .about-hero-actions {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  min-width: 0;
}

.page-about .about-stat {
  padding: 16px 18px 15px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-stat-unit {
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--gray);
}

/* ---------- 左右分屏主体 ---------- */
.page-about .about-body {
  display: grid;
  gap: 0;
  padding-bottom: clamp(48px, 8vw, 96px);
  min-width: 0;
}

.page-about .about-axis {
  min-width: 0;
}

.page-about .about-axis-sticky {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-bottom: 26px;
  min-width: 0;
}

.page-about .about-axis-label {
  margin: 0;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--teal);
}

.page-about .about-chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-axis-note {
  padding: 16px 18px;
  display: grid;
  gap: 2px;
}

.page-about .about-axis-note-label {
  margin: 0;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gray);
}

.page-about .about-axis-note-value {
  margin: 4px 0 2px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-axis-note-text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 右侧连续画布 ---------- */
.page-about .about-canvas {
  display: flex;
  flex-direction: column;
  gap: clamp(46px, 6vw, 86px);
  min-width: 0;
}

.page-about .about-block {
  margin: 0;
  padding-block: 0;
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 32px);
}

.page-about .about-block-lede {
  max-width: 64ch;
  margin-top: clamp(16px, 2vw, 24px);
}

/* ---------- 业务范围：人群列表 ---------- */
.page-about .about-audience {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 22px 30px;
  min-width: 0;
}

.page-about .about-audience-item {
  position: relative;
  padding-left: 20px;
  min-width: 0;
}

.page-about .about-audience-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--teal), rgba(61, 245, 212, 0));
}

.page-about .about-audience-role {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-audience-item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 影像容器 ---------- */
.page-about .about-media {
  margin: clamp(28px, 4vw, 44px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(158deg, var(--deep-teal), var(--ink-900));
}

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

.page-about .about-media--lineage {
  width: 100%;
  max-width: 360px;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  min-width: 0;
}

.page-about .about-team-copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

/* ---------- 服务路径 ---------- */
.page-about .about-path-track {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  position: relative;
  min-width: 0;
}

.page-about .about-path-node {
  position: relative;
  padding: 44px 18px 20px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface), rgba(28, 51, 80, 0));
  min-width: 0;
  transition: background .35s var(--ease), transform .35s var(--ease);
}

.page-about .about-path-dot {
  position: absolute;
  top: 0;
  left: 18px;
  width: 34px;
  height: 34px;
  border-radius: var(--pill);
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  display: grid;
  place-items: center;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-path-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-path-node p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-path-note {
  margin-top: clamp(18px, 3vw, 28px);
}

/* ---------- 联赛覆盖 ---------- */
.page-about .about-leagues {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  min-width: 0;
}

.page-about .about-league {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
  min-width: 0;
}

.page-about .about-league:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-league-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--teal);
}

.page-about .about-league-body {
  min-width: 0;
}

.page-about .about-league-name {
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-league-body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .about-coverage-tail {
  margin-top: clamp(24px, 3vw, 34px);
  max-width: 68ch;
}

/* ---------- 归档节奏 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .about-cadence-item {
  position: relative;
  padding: 20px 22px 20px 24px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--surface), rgba(28, 51, 80, .12));
  min-width: 0;
  overflow: hidden;
}

.page-about .about-cadence-item::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--teal), rgba(61, 245, 212, .06));
}

.page-about .about-cadence-num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 4px;
}

.page-about .about-cadence-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-cadence-body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 沿革索引 ---------- */
.page-about .about-lineage-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(18px, 3vw, 28px);
  min-width: 0;
}

.page-about .about-lineage-copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .about-lineage-levels {
  margin: 4px 0;
  display: grid;
  gap: 14px;
}

.page-about .about-lineage-level {
  padding-left: 18px;
  border-left: 2px solid var(--line-strong);
}

.page-about .about-lineage-level dt {
  margin-bottom: 4px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-lineage-level dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  min-width: 0;
}

.page-about .about-eco-stat {
  padding: 22px 18px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-eco-label {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--gray);
}

/* ---------- 联系与勘误 ---------- */
.page-about .about-contact-panel {
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(24px, 4vw, 38px);
}

.page-about .about-contact-panel p {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 66ch;
}

.page-about .about-contact-panel p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-contact-panel .btn-row {
  margin-top: 22px;
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 680px) {
  .page-about .about-audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }
}

/* ---------- 服务路径转横向 ---------- */
@media (min-width: 880px) {
  .page-about .about-path-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-path-track::before {
    content: "";
    position: absolute;
    top: 17px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--teal), var(--gold) 58%, rgba(245, 193, 92, 0));
    opacity: .55;
  }

  .page-about .about-path-node {
    padding: 44px 14px 0;
    background: none;
    transform: none;
  }

  .page-about .about-path-dot {
    left: 14px;
  }

  .page-about .about-path-node:hover .about-path-dot,
  .page-about .about-path-node:focus-within .about-path-dot {
    border-color: var(--teal);
    box-shadow: var(--shadow-glow);
  }
}

@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team-grid .about-media {
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-lineage-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: start;
  }

  .page-about .about-media--lineage {
    margin-top: 4px;
  }
}

@media (min-width: 780px) {
  .page-about .about-eco-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 桌面分屏 ---------- */
@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-axis-sticky {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    max-height: calc(100vh - var(--header-h) - 60px);
    overflow: auto;
    padding-bottom: 0;
    scrollbar-width: none;
  }

  .page-about .about-axis-sticky::-webkit-scrollbar {
    display: none;
  }

  .page-about .about-chapter-nav {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>