.page-about {
  --about-rule: var(--ly-line-soft);
  --about-strong: var(--ly-line-strong);
  background: var(--ly-paper);
  color: var(--ly-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 40px) 0 clamp(36px, 6vw, 72px);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 22px;
}

.page-about h1 {
  margin: 0;
  font-size: clamp(34px, 6.4vw, 76px);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -.025em;
  color: var(--ly-blue-deep);
}

.page-about .hero-copy .eyebrow {
  margin: 0 0 12px;
}

.page-about .hero-copy .lede {
  margin: 20px 0 0;
  max-width: 36ch;
}

.page-about .hero-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-rule);
  display: flex;
  flex-wrap: wrap;
}

.page-about .hero-facts li {
  flex: 1 1 30%;
  min-width: 92px;
  padding-right: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .hero-facts li + li {
  padding-left: 16px;
  border-left: 1px solid var(--about-rule);
}

.page-about .hero-facts .mono {
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1;
  color: var(--ly-blue);
}

.page-about .fact-label {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ly-green);
  opacity: .78;
}

.page-about .hero-media {
  margin: 0;
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-rule);
  background: var(--ly-mist);
}

/* ---------- 品牌视角 ---------- */
.page-about .about-view {
  border-top: 1px solid var(--about-rule);
}

.page-about .split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .rail-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ly-line);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: rail;
}

.page-about .rail-list li {
  counter-increment: rail;
  border-top: 1px solid var(--about-rule);
}

.page-about .rail-list li:last-child {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .rail-list a {
  display: block;
  padding: 9px 0;
  font-size: 14px;
  color: var(--ly-green);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-about .rail-list a::before {
  content: counter(rail, decimal-leading-zero);
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ly-line);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--ly-orange);
}

.page-about .split-body h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--ly-blue-deep);
}

.page-about .split-body p {
  margin: 0 0 16px;
  max-width: 33em;
  line-height: 1.85;
}

.page-about .split-body p:last-child {
  margin-bottom: 0;
}

.page-about .view-lead {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ly-ink);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ly-sand);
}

.page-about .section-head {
  margin-bottom: clamp(26px, 4vw, 44px);
  max-width: 44em;
}

.page-about .section-head h2 {
  margin: 10px 0 14px;
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ly-blue-deep);
}

.page-about .section-lede {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .team-cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 26px;
  background: var(--ly-paper);
  border: 1px solid var(--about-rule);
}

.page-about .team-cell h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ly-blue-deep);
}

.page-about .team-cell p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .team-num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
}

.page-about .team-num .mono {
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1;
  font-weight: 500;
  color: var(--ly-orange);
}

.page-about .team-unit {
  font-size: 13px;
  color: var(--ly-green);
  opacity: .75;
}

.page-about .team-kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ly-orange);
}

.page-about .team-cell--accent {
  background: var(--ly-blue-deep);
  border-color: var(--ly-blue-deep);
}

.page-about .team-cell--accent h3 {
  color: var(--ly-paper);
}

.page-about .team-cell--accent p {
  color: var(--ly-sand);
  opacity: .86;
}

.page-about .team-cell--accent .team-kicker {
  color: var(--ly-orange-soft);
}

.page-about .team-media {
  margin: 28px 0 0;
}

.page-about .team-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-rule);
}

.page-about .team-media figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--ly-green);
  opacity: .72;
}

/* ---------- 流程 ---------- */
.page-about .about-process {
  background: var(--ly-mist);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 16px 0 0;
  border-top: 2px solid var(--ly-blue);
}

.page-about .flow-num {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ly-blue-deep);
}

.page-about .flow-step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ly-blue-deep);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .flow-arrow {
  display: none;
  width: 24px;
  height: 12px;
  color: var(--ly-orange);
}

/* ---------- 合作与覆盖 ---------- */
.page-about .about-partners {
  background: var(--ly-green);
  color: var(--ly-sand);
}

.page-about .partners-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-partners .eyebrow {
  color: var(--ly-orange-soft);
}

.page-about .about-partners h2 {
  margin: 10px 0 18px;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--ly-paper);
}

.page-about .about-partners p {
  margin: 0 0 16px;
  max-width: 33em;
  line-height: 1.85;
  color: var(--ly-sand);
  opacity: .85;
}

.page-about .coverage-panel {
  padding: 20px;
  border: 1px solid rgba(243, 238, 228, .24);
  background: rgba(243, 238, 228, .05);
}

.page-about .coverage-map {
  height: 170px;
  background-image: radial-gradient(circle, rgba(243, 238, 228, .55) 1px, transparent 1.6px);
  background-size: 13px 13px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 42%, transparent 80%);
  mask-image: radial-gradient(circle at 50% 50%, #000 42%, transparent 80%);
}

.page-about .coverage-panel .coverage-cap {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ly-sand);
  opacity: .72;
}

/* ---------- 发展节点 ---------- */
.page-about .timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .timeline-copy h2 {
  margin: 10px 0 16px;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ly-blue-deep);
}

.page-about .timeline-copy p {
  margin: 0 0 18px;
  max-width: 33em;
  line-height: 1.85;
}

.page-about .timeline-media {
  margin: 24px 0 0;
}

.page-about .timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-rule);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline-node {
  border-top: 1px solid var(--about-rule);
}

.page-about .timeline-node:last-child {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .node summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-about .node summary:focus-visible {
  outline: 2px solid var(--ly-orange);
  outline-offset: 3px;
}

.page-about .node-idx {
  font-size: 12px;
  color: var(--ly-orange);
}

.page-about .node-title {
  flex: 1;
  font-size: 17px;
  font-weight: 600;
  color: var(--ly-blue-deep);
}

.page-about .node-cue {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-about .node-cue::before,
.page-about .node-cue::after {
  content: "";
  position: absolute;
  background: var(--ly-blue);
  transition: transform .2s var(--ease);
}

.page-about .node-cue::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-about .node-cue::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-about .node[open] .node-cue::after {
  transform: scaleY(0);
}

.page-about .node p {
  margin: 0 0 18px;
  padding-left: 26px;
  max-width: 33em;
  font-size: 14.5px;
  line-height: 1.85;
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  background: var(--ly-sand);
}

.page-about .principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  counter-reset: prin;
}

.page-about .principles li {
  counter-increment: prin;
  padding-top: 18px;
  border-top: 1px solid var(--about-strong);
}

.page-about .principles li::before {
  content: counter(prin, decimal-leading-zero);
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ly-orange);
}

.page-about .principles h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ly-blue-deep);
}

.page-about .principles p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 相关页面 ---------- */
.page-about .next-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding-top: 24px;
  border-top: 2px solid var(--ly-blue);
}

.page-about .next-copy h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 600;
  color: var(--ly-blue-deep);
  letter-spacing: -.01em;
}

.page-about .next-copy p {
  margin: 0;
  max-width: 32em;
  line-height: 1.8;
}

.page-about .next-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .next-link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--ly-paper);
  border: 1px solid var(--about-rule);
  text-decoration: none;
  color: var(--ly-ink);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--ly-blue);
  background: var(--ly-mist);
}

.page-about .next-k {
  grid-row: span 2;
  font-size: 12px;
  color: var(--ly-orange);
}

.page-about .next-t {
  font-weight: 600;
  color: var(--ly-blue-deep);
}

.page-about .next-d {
  font-size: 13px;
  opacity: .75;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 760px) {
  .page-about .principles {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-about .next-panel {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .next-links {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 860px) {
  .page-about .flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .flow-step {
    padding-right: 22px;
  }

  .page-about .flow-arrow {
    display: block;
    position: absolute;
    top: -7px;
    right: -12px;
  }

  .page-about .flow-step:last-child .flow-arrow {
    display: none;
  }
}

@media (min-width: 900px) {
  .page-about .split {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-about .partners-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .timeline-grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 56px;
    align-items: start;
  }
}