.page-about {
  --about-pad: clamp(56px, 8vw, 112px);
  --about-gap: clamp(20px, 3vw, 36px);
  --about-hairline: 1px solid rgba(233, 238, 247, 0.14);
  --about-ink-soft: rgba(233, 238, 247, 0.76);
  background: var(--c-paper);
  color: var(--c-text);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 18px;
  padding-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.page-about .breadcrumb-item {
  color: var(--c-indigo-soft);
  text-decoration: none;
}
.page-about .breadcrumb-item[aria-current="page"] {
  color: var(--c-text);
  letter-spacing: 0.02em;
}
.page-about .breadcrumb-sep {
  color: var(--c-grid);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--c-indigo);
  color: var(--c-text-dark);
  padding: clamp(36px, 5vw, 76px) 0 clamp(44px, 6vw, 88px);
  border-bottom: 1px solid rgba(0, 229, 199, 0.24);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(233, 238, 247, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(233, 238, 247, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}
.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.page-about .about-hero h1 {
  margin: 20px 0 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(32px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: #fff;
}
.page-about .about-lede {
  max-width: 60ch;
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}
.page-about .about-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(233, 238, 247, 0.16);
  border: 1px solid rgba(233, 238, 247, 0.16);
}
.page-about .about-stat {
  background: var(--c-indigo);
  padding: 18px 16px;
}
.page-about .about-stat-num {
  display: block;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--c-orange);
  letter-spacing: -0.02em;
}
.page-about .about-stat-label {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(233, 238, 247, 0.68);
}

/* ---------- 通用小标题 ---------- */
.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-orange-text);
}
.page-about h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.005em;
}
.page-about h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 600;
}

/* ---------- 业务定位 ---------- */
.page-about .about-scope {
  padding: var(--about-pad) 0;
  background: var(--c-paper);
}
.page-about .about-scope-intro {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: #3C4657;
}
.page-about .about-scope-grid {
  margin-top: clamp(28px, 4vw, 52px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-grid);
  border: 1px solid var(--c-grid);
}
.page-about .about-scope-card {
  position: relative;
  background: #fff;
  padding: clamp(22px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background-color 180ms var(--ease);
}
.page-about .about-scope-card::after {
  content: attr(data-index);
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-indigo-soft);
}
.page-about .about-scope-card:hover {
  background: var(--c-paper);
}
.page-about .about-card-sizes {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-orange-text);
}
.page-about .about-scope-card p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #4A5568;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
  background: var(--c-ink);
  color: var(--c-text-dark);
}
.page-about .about-timeline .about-kicker {
  color: var(--c-orange);
}
.page-about .about-timeline-intro {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}
.page-about .about-timeline-figure {
  margin: clamp(28px, 4vw, 48px) 0 0;
}
.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--about-hairline);
  object-fit: cover;
}
.page-about .about-timeline-layout {
  margin-top: clamp(30px, 4vw, 56px);
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}
.page-about .about-years-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(233, 238, 247, 0.5);
}
.page-about .about-years ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-years ul::-webkit-scrollbar {
  display: none;
}
.page-about .about-years a {
  display: block;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(233, 238, 247, 0.62);
  text-decoration: none;
  border-bottom: 1px solid rgba(233, 238, 247, 0.14);
  white-space: nowrap;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
}
.page-about .about-axis {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: rgba(233, 238, 247, 0.2);
}
.page-about .about-axis-item {
  position: relative;
  padding-left: 32px;
}
.page-about .about-axis-item + .about-axis-item {
  margin-top: 12px;
}
.page-about .about-axis-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 15px;
  height: 15px;
  background: var(--c-ink);
  border: 1px solid var(--c-cyan);
}
.page-about .about-node {
  border: var(--about-hairline);
  background: rgba(233, 238, 247, 0.03);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}
.page-about .about-node[open] {
  background: rgba(46, 66, 114, 0.34);
  border-color: rgba(0, 229, 199, 0.34);
}
.page-about .about-node-summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-node-summary::-webkit-details-marker {
  display: none;
}
.page-about .about-node-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--c-cyan);
  flex: 0 0 auto;
}
.page-about .about-node[open] .about-node-summary::after {
  content: "–";
}
.page-about .about-node-year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-orange);
}
.page-about .about-node-title {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--c-text-dark);
  line-height: 1.45;
}
.page-about .about-node-body {
  padding: 0 18px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}
.page-about .about-node-body p {
  margin: 0;
}
.page-about .about-node-body ul {
  margin: 10px 0 0;
  padding-left: 18px;
}
.page-about .about-node-body li + li {
  margin-top: 6px;
}
.page-about .about-node-body li::marker {
  color: var(--c-cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
  background: var(--c-paper);
}
.page-about .about-team-intro {
  max-width: 56ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: #3C4657;
}
.page-about .about-team-layout {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}
.page-about .about-role + .about-role {
  margin-top: 24px;
}
.page-about .about-role-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-about .about-role-name {
  font-size: 16px;
  font-weight: 600;
}
.page-about .about-role-count {
  font-size: 14px;
  color: var(--c-orange-text);
  letter-spacing: 0.02em;
}
.page-about .about-role-bar {
  margin-top: 10px;
  height: 8px;
  background: var(--c-grid);
  overflow: hidden;
}
.page-about .about-role-bar > span {
  display: block;
  height: 100%;
  width: var(--bar, 0%);
  background: var(--c-indigo-mid);
  transition: width 600ms var(--ease), background-color 180ms var(--ease);
}
.page-about .about-role:hover .about-role-bar > span {
  background: var(--c-orange);
}
.page-about .about-role-desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #4A5568;
}
.page-about .about-team-note {
  background: #fff;
  border: 1px solid var(--c-grid);
  border-top: 2px solid var(--c-indigo);
  padding: clamp(20px, 3vw, 28px);
}
.page-about .about-team-note h3 {
  font-size: 17px;
}
.page-about .about-note-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}
.page-about .about-note-list li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: #4A5568;
  border-top: 1px solid var(--c-grid);
}
.page-about .about-note-list li:last-child {
  border-bottom: 1px solid var(--c-grid);
}
.page-about .about-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 7px;
  height: 7px;
  background: var(--c-cyan);
}
.page-about .about-note-btn {
  margin-top: 20px;
}

/* ---------- 质检 ---------- */
.page-about .about-quality {
  padding: var(--about-pad) 0;
  background: #fff;
  border-top: 1px solid var(--c-grid);
}
.page-about .about-quality-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}
.page-about .about-quality-intro {
  margin: 20px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: #3C4657;
}
.page-about .about-check-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}
.page-about .about-check-list li {
  position: relative;
  padding: 14px 0 14px 26px;
  border-top: 1px solid var(--c-grid);
  font-size: 15px;
  line-height: 1.75;
  color: #39424F;
}
.page-about .about-check-list li:last-child {
  border-bottom: 1px solid var(--c-grid);
}
.page-about .about-check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 8px;
  background: var(--c-cyan);
}
.page-about .about-quality-figure {
  margin: 0;
}
.page-about .about-quality-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--c-grid);
}
.page-about .about-quality-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-indigo-soft);
}

/* ---------- 双仓 ---------- */
.page-about .about-warehouse {
  padding: var(--about-pad) 0;
  background: var(--c-paper);
  border-top: 1px solid var(--c-grid);
}
.page-about .about-warehouse-intro {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: #3C4657;
}
.page-about .about-warehouse-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}
.page-about .about-warehouse-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--c-grid);
}
.page-about .about-warehouse-grid {
  margin-top: clamp(24px, 3vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-grid);
  border: 1px solid var(--c-grid);
}
.page-about .about-wh-card {
  background: #fff;
  padding: clamp(22px, 3vw, 30px);
}
.page-about .about-wh-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  letter-spacing: 0.01em;
}
.page-about .about-wh-tag {
  display: inline-block;
  margin: 12px 0 0;
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-indigo);
  background: var(--c-grid);
}
.page-about .about-wh-card p:last-child {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #4A5568;
}
.page-about .about-leadtime {
  margin-top: clamp(24px, 3vw, 40px);
  border: 1px solid var(--c-grid);
  background: #fff;
  padding: clamp(20px, 3vw, 30px);
}
.page-about .about-leadtime-label {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-indigo-soft);
}
.page-about .about-leadtime-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-leadtime-grid li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-grid);
}
.page-about .about-lt-code {
  flex: 0 0 auto;
  min-width: 76px;
  font-size: 14px;
  font-weight: 700;
  color: var(--c-orange-text);
}
.page-about .about-lt-text {
  font-size: 14.5px;
  line-height: 1.7;
  color: #39424F;
}
.page-about .about-leadtime-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-indigo-soft);
}
.page-about .about-leadtime-note a {
  color: var(--c-orange-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-ecosystem {
  padding: var(--about-pad) 0;
  background: var(--c-indigo);
  color: var(--c-text-dark);
}
.page-about .about-ecosystem .about-kicker {
  color: var(--c-orange);
}
.page-about .about-eco-intro {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}
.page-about .about-eco-grid {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(233, 238, 247, 0.16);
  border: 1px solid rgba(233, 238, 247, 0.16);
}
.page-about .about-eco-item {
  background: var(--c-indigo);
  padding: clamp(20px, 3vw, 30px) clamp(16px, 2.4vw, 24px);
}
.page-about .about-eco-num {
  display: block;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1;
  color: var(--c-orange);
  letter-spacing: -0.03em;
}
.page-about .about-eco-label {
  display: block;
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(233, 238, 247, 0.76);
}
.page-about .about-eco-note {
  max-width: 70ch;
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 6vw, 76px) 0;
  background: var(--c-ink);
  color: var(--c-text-dark);
  border-top: 1px solid rgba(0, 229, 199, 0.28);
}
.page-about .about-cta-inner {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.page-about .about-cta-text h2 {
  font-size: clamp(24px, 3.6vw, 36px);
  color: #fff;
}
.page-about .about-cta-text p {
  max-width: 58ch;
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-about .about-warehouse-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-leadtime-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-scope-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }
  .page-about .about-cta-text {
    max-width: 62%;
  }
  .page-about .about-cta .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  }
  .page-about .about-timeline-layout {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-years {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
  .page-about .about-years ul {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
  }
  .page-about .about-years a {
    border-bottom: 0;
    border-left: 2px solid rgba(233, 238, 247, 0.14);
  }
  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
    align-items: start;
  }
  .page-about .about-team-note {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
  .page-about .about-quality-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-scope-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-eco-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role-bar > span,
  .page-about .about-scope-card,
  .page-about .about-node,
  .page-about .about-years a {
    transition: none;
  }
}

.page-about {
  --bar: 1rem;
}