.page-about {
  --about-rail-w: 84px;
  --about-body-w: 780px;
  padding-bottom: 104px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 26px 0 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}
.page-about .breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold-500);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-100);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 52px 0 68px;
  overflow: hidden;
}
.page-about .about-hero::before,
.page-about .about-hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(12px);
}
.page-about .about-hero::before {
  width: 620px;
  height: 620px;
  top: -280px;
  left: -180px;
  background: radial-gradient(closest-side, rgba(232, 180, 74, 0.22), transparent 72%);
}
.page-about .about-hero::after {
  width: 480px;
  height: 480px;
  right: -160px;
  bottom: -240px;
  background: radial-gradient(closest-side, rgba(35, 192, 138, 0.16), transparent 72%);
}
.page-about .about-hero-in {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
@media (min-width: 1000px) {
  .page-about .about-hero-in {
    grid-template-columns: minmax(0, 1.55fr) minmax(250px, 0.85fr);
    gap: 56px;
    align-items: end;
  }
}

.page-about .about-kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--jade-500);
}
.page-about .about-title {
  margin: 0 0 24px;
  max-width: 15ch;
  font-size: clamp(34px, 6.4vw, 62px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--text-100);
}
.page-about .about-hero-lead {
  margin: 0 0 30px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-muted);
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-aside {
  padding: 26px 24px;
  border-radius: 18px;
}
.page-about .aside-title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold-500);
}
.page-about .aside-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-about .aside-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink-700);
}
.page-about .aside-facts li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .aside-key {
  font-size: 13px;
  color: var(--text-muted);
}
.page-about .aside-val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--gold-200);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 54px 0;
  border-top: 1px solid var(--ink-700);
}
.page-about .about-block--last {
  padding-bottom: 0;
}
@media (min-width: 1000px) {
  .page-about .about-block {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 40px;
    padding: 72px 0;
  }
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 14px;
}
.page-about .about-rail::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--gold-500), transparent);
}
.page-about .about-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-500);
  transform: rotate(-8deg);
}
@media (min-width: 1000px) {
  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
    align-self: stretch;
  }
  .page-about .about-rail::after {
    width: 1px;
    height: auto;
    flex: 1;
    background: linear-gradient(180deg, var(--gold-500), rgba(232, 180, 74, 0));
  }
  .page-about .about-num {
    font-size: 28px;
  }
}

.page-about .about-body {
  max-width: var(--about-body-w);
}
.page-about .about-body--wide {
  max-width: 100%;
}

.page-about .about-h2 {
  margin: 0 0 20px;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.28;
  letter-spacing: 0.01em;
  color: var(--text-100);
}
.page-about .about-lead {
  margin: 0 0 20px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--gold-200);
}
.page-about .about-body > p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-muted);
}
.page-about .about-body a {
  color: var(--gold-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 180, 74, 0.4);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.page-about .about-body a:hover,
.page-about .about-body a:focus-visible {
  color: var(--gold-200);
  border-bottom-color: var(--gold-200);
}

/* ---------- 使用场景 ---------- */
.page-about .about-uses {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-about .use-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 22px;
  border-radius: 16px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  transition: border-color 0.35s var(--ease);
}
.page-about .use-item:hover {
  border-color: rgba(232, 180, 74, 0.45);
}
.page-about .use-idx {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--jade-500);
  padding-top: 3px;
}
.page-about .use-text h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-100);
}
.page-about .use-text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 标签切换 ---------- */
.page-about .about-tabs {
  margin-top: 28px;
}
.page-about .tab-list {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 5px;
  margin-bottom: 32px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-line);
}
.page-about .tab {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 10px 20px;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}
.page-about .tab:hover,
.page-about .tab:focus-visible {
  color: var(--text-100);
}
.page-about .tab[aria-selected="true"] {
  background: var(--gold-500);
  color: var(--ink-950);
}
.page-about .tab:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 2px;
}
.page-about .tab-panel[hidden] {
  display: none;
}
.page-about .tab-panel:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 6px;
  border-radius: 12px;
}

/* ---------- 栏目版图 ---------- */
.page-about .map-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}
@media (min-width: 1024px) {
  .page-about .map-layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}
.page-about .map-list {
  display: grid;
  gap: 14px;
}
.page-about .map-item {
  position: relative;
  display: block;
  padding: 22px 24px 22px 62px;
  border-radius: 16px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  text-decoration: none;
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease), background 0.35s var(--ease);
}
.page-about .map-item:hover,
.page-about .map-item:focus-visible {
  border-color: rgba(232, 180, 74, 0.55);
  background: #0C1938;
  transform: translateX(4px);
}
.page-about .map-idx {
  position: absolute;
  left: 22px;
  top: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold-500);
}
.page-about .map-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-100);
}
.page-about .map-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-about .figure {
  margin: 0;
}
.page-about .figure-media {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--ink-700);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
}
.page-about .figure-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .figure-caption {
  margin: 12px 2px 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ---------- 团队分工 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}
@media (min-width: 1024px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 40px;
    align-items: start;
  }
}
.page-about .team-list {
  display: grid;
  gap: 18px;
  padding-left: 22px;
  border-left: 1px solid var(--ink-700);
}
.page-about .team-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-100);
}
.page-about .team-item h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 2px;
  background: var(--jade-500);
  vertical-align: middle;
  transform: translateY(-1px);
}
.page-about .team-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-about .team-stats {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px dashed var(--ink-700);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
}
@media (min-width: 760px) {
  .page-about .team-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .team-stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
}
.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-500);
}
.page-about .stat-unit {
  font-size: 13px;
  color: var(--gold-200);
}
.page-about .stat-label {
  flex: 0 0 100%;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ---------- 发展节奏 ---------- */
.page-about .about-timeline {
  margin: 30px 0 0;
  padding: 0 0 0 28px;
  list-style: none;
  border-left: 1px solid var(--ink-700);
  display: grid;
  gap: 30px;
}
.page-about .timeline-node {
  position: relative;
}
.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(232, 180, 74, 0.14);
}
.page-about .timeline-node--now::before {
  background: var(--magenta-500);
  box-shadow: 0 0 0 4px rgba(255, 61, 139, 0.16);
}
.page-about .timeline-year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold-200);
}
.page-about .timeline-node--now .timeline-year {
  color: var(--magenta-500);
}
.page-about .timeline-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-100);
}
.page-about .timeline-card p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 820px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .partner-card {
  padding: 24px 22px;
  border-radius: 16px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  transition: border-color 0.35s var(--ease);
}
.page-about .partner-card:hover {
  border-color: rgba(35, 192, 138, 0.5);
}
.page-about .partner-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--jade-500);
  border: 1px solid rgba(35, 192, 138, 0.35);
  background: rgba(35, 192, 138, 0.08);
}
.page-about .partner-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-100);
}
.page-about .partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}
.page-about .partner-note {
  margin-top: 24px;
  font-size: 15px;
  color: var(--text-muted);
}

/* ---------- 服务地区 ---------- */
.page-about .region-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 1024px) {
  .page-about .region-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: start;
  }
}
.page-about .region-facts {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ink-700);
}
.page-about .region-fact {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ink-700);
}
.page-about .region-fact dt {
  font-size: 13px;
  color: var(--text-muted);
}
.page-about .region-fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-100);
  word-break: break-word;
}
.page-about .region-fact dd a {
  color: var(--gold-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 180, 74, 0.4);
}
.page-about .region-fact dd a:hover,
.page-about .region-fact dd a:focus-visible {
  color: var(--gold-200);
  border-bottom-color: var(--gold-200);
}
.page-about .region-cta {
  font-size: 15px;
}
.page-about .region-figure .figure-media {
  border-color: rgba(232, 180, 74, 0.22);
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .map-item,
  .page-about .use-item,
  .page-about .partner-card,
  .page-about .about-num,
  .page-about .tab {
    transition: none;
  }
  .page-about .map-item:hover,
  .page-about .map-item:focus-visible {
    transform: none;
  }
}