.page-about {
  --about-goal: rgba(255, 107, 53, 0.2);
  --about-ink-soft: rgba(244, 251, 247, 0.78);
  display: block;
  padding-bottom: 1rem;
}

.page-about .breadcrumbs {
  padding-top: 1.5rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 2.25rem 0 2.5rem;
  overflow: hidden;
}

.page-about .hero-mark {
  position: absolute;
  top: -1.4rem;
  right: -0.75rem;
  font-family: var(--font-num);
  font-size: clamp(6rem, 24vw, 15rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(183, 247, 208, 0.045);
  -webkit-text-stroke: 1px rgba(183, 247, 208, 0.16);
  pointer-events: none;
  user-select: none;
}

.page-about .about-kicker {
  position: relative;
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  font-size: var(--fs-caption);
  letter-spacing: 0.18em;
  color: var(--warm-yellow);
}

.page-about .about-kicker::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 2px;
  background: var(--highland-orange);
}

.page-about .about-hero h1 {
  position: relative;
  margin: 0 0 1.2rem;
  max-width: 20ch;
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--cool-white);
}

.page-about .about-lead {
  position: relative;
  max-width: 60ch;
  margin: 0 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line-soft);
}

.page-about .about-stats .stat {
  padding: 1rem 1.1rem 1.1rem;
  background: linear-gradient(180deg, rgba(20, 90, 58, 0.55), rgba(11, 44, 30, 0.85));
}

.page-about .stat dt {
  margin-bottom: 0.4rem;
  font-size: var(--fs-caption);
  color: var(--sage-mist);
  letter-spacing: 0.04em;
}

.page-about .stat dd {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--score-yellow);
}

.page-about .stat-num {
  font-family: var(--font-num);
}

/* ---------- 目录条 ---------- */
.page-about .about-jump {
  display: flex;
  gap: 0.5rem;
  padding: 1.25rem 0 1.1rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-jump a {
  flex: 0 0 auto;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: var(--fs-caption);
  color: var(--sage-mist);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--score-yellow);
  border-color: var(--score-yellow);
  background: rgba(244, 255, 74, 0.06);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .sec-grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .sec-side {
  position: relative;
}

.page-about .sec-no {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-num);
  font-size: clamp(2.1rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.02em;
  font-feature-settings: "tnum" 1;
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .sec-no {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--highland-orange);
  }
}

@supports not (-webkit-text-stroke: 1px #000) {
  .page-about .sec-no {
    color: var(--highland-orange);
  }
}

.page-about .sec-side h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.8vw, 1.55rem);
  font-weight: 800;
  line-height: 1.4;
  color: var(--cool-white);
}

.page-about .sec-main {
  min-width: 0;
}

.page-about .sec-main p {
  max-width: 64ch;
  margin: 0 0 1.1rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .sec-main p:last-of-type {
  margin-bottom: 0;
}

/* ---------- 要点胶囊 ---------- */
.page-about .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .chips li {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 90, 58, 0.4);
  font-size: var(--fs-caption);
  color: var(--cool-white);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 1.75rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(20, 90, 58, 0.5), rgba(6, 26, 18, 0.92));
  box-shadow: 0 20px 44px -30px rgba(0, 0, 0, 0.95);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-figure figcaption {
  padding: 0.7rem 1rem 0.8rem;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-caption);
  color: var(--sage-mist);
}

/* ---------- 版本时间线 ---------- */
.page-about .v-timeline {
  position: relative;
  margin: 1.75rem 0 0;
  padding: 0 0 0 2.25rem;
  list-style: none;
}

.page-about .v-timeline::before {
  content: "";
  position: absolute;
  left: calc(0.8rem - 0.5px);
  top: 0.7rem;
  bottom: 0.7rem;
  width: 1px;
  background: linear-gradient(180deg, var(--highland-orange) 0%, rgba(183, 247, 208, 0.2) 100%);
}

.page-about .v-node {
  position: relative;
  margin: 0 0 0.7rem;
}

.page-about .v-node:last-child {
  margin-bottom: 0;
}

.page-about .v-node::before {
  content: "";
  position: absolute;
  left: -1.7rem;
  top: 1.15rem;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--score-yellow);
  box-shadow: 0 0 10px rgba(244, 255, 74, 0.5);
}

.page-about .v-drawer {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 90, 58, 0.5), rgba(11, 44, 30, 0.78));
  overflow: hidden;
  transition: border-color 180ms ease;
}

.page-about .v-drawer[open] {
  border-color: rgba(244, 255, 74, 0.4);
}

.page-about .v-drawer summary {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--cool-white);
}

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

.page-about .v-drawer summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--highland-orange);
  transition: transform 220ms ease;
}

.page-about .v-drawer[open] summary::after {
  content: "−";
}

.page-about .v-drawer[open] summary {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .v-tag {
  flex: 0 0 auto;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  background: var(--score-yellow);
  color: var(--ink-night);
  font-family: var(--font-num);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .v-title {
  font-size: 0.9375rem;
}

.page-about .v-desc {
  margin: 0;
  padding: 0.85rem 1rem 1rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--sage-mist);
}

/* ---------- 区域服务 ---------- */
.page-about .sunrise-card {
  padding: 1.5rem 1.25rem 1.25rem;
  border: 1px solid rgba(255, 107, 53, 0.35);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 130% at 100% 0%, var(--about-goal), transparent 58%),
    linear-gradient(180deg, rgba(20, 90, 58, 0.55), rgba(6, 26, 18, 0.9));
}

.page-about .fact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin: 1.4rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid rgba(255, 107, 53, 0.28);
  list-style: none;
}

.page-about .fact-row li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.page-about .fact-num {
  font-family: var(--font-num);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--warm-yellow);
}

.page-about .fact-label {
  font-size: var(--fs-caption);
  color: var(--sage-mist);
}

/* ---------- 合作与认可 ---------- */
.page-about .award-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .award-list li {
  position: relative;
  padding: 0.85rem 0 0.85rem 1.35rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.9375rem;
  color: var(--cool-white);
}

.page-about .award-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.35rem;
  width: 0.55rem;
  height: 2px;
  background: var(--highland-orange);
}

/* ---------- 团队标签页 ---------- */
.page-about .team-tabs {
  margin-top: 1.5rem;
}

.page-about .team-tabs .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.page-about .team-tabs .tab {
  padding: 0.5rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 44, 30, 0.7);
  color: var(--sage-mist);
  font-family: inherit;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-about .team-tabs .tab:hover {
  color: var(--cool-white);
  border-color: var(--border-glow);
}

.page-about .team-tabs .tab[aria-selected="true"] {
  background: var(--score-yellow);
  border-color: var(--score-yellow);
  color: var(--ink-night);
  font-weight: 700;
}

.page-about .team-tabs .tab:focus-visible {
  outline: 2px solid var(--border-glow);
  outline-offset: 2px;
}

.page-about .team-tabs .tab-panel {
  padding: 1.25rem 1.25rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--highland-orange);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 90, 58, 0.5), rgba(11, 44, 30, 0.82));
}

.page-about .team-tabs .tab-panel:focus-visible {
  outline: 2px solid var(--border-glow);
  outline-offset: 2px;
}

.page-about .team-count {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin: 0 0 0.7rem;
  font-size: var(--fs-caption);
  letter-spacing: 0.08em;
  color: var(--sage-mist);
}

.page-about .team-num {
  font-family: var(--font-num);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--score-yellow);
}

.page-about .team-desc {
  max-width: 60ch;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  margin: 2.5rem 0 3rem;
  padding: 2rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 107, 53, 0.24), transparent 55%),
    linear-gradient(180deg, rgba(20, 90, 58, 0.6), rgba(6, 26, 18, 0.94));
}

.page-about .about-cta h2 {
  margin: 0 0 0.8rem;
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.25;
  color: var(--cool-white);
}

.page-about .about-cta > p {
  max-width: 58ch;
  margin: 0 0 1.5rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .cta-fine {
  margin: 1.4rem 0 0;
  font-size: var(--fs-caption);
  color: var(--sage-mist);
}

.page-about .cta-fine a {
  color: var(--warm-yellow);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .cta-fine a:hover {
  color: var(--score-yellow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding-top: 2.75rem;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .fact-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }

  .page-about .fact-row li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .page-about .about-cta {
    padding: 2.5rem 2.25rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 3.25rem 0 3rem;
  }

  .page-about .about-lead {
    font-size: 1.125rem;
  }

  .page-about .sec-grid {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-about .sec-side {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

  .page-about .about-sec {
    padding: 3.5rem 0;
  }

  .page-about .sec-main p {
    font-size: 1.03125rem;
  }

  .page-about .v-timeline {
    padding-left: 2.5rem;
  }

  .page-about .v-timeline::before {
    left: calc(1.05rem - 0.5px);
  }

  .page-about .v-node::before {
    left: -1.95rem;
  }

  .page-about .fact-num {
    font-size: 2rem;
  }
}

@media (min-width: 1100px) {
  .page-about .sec-grid {
    grid-template-columns: 290px minmax(0, 1fr);
    gap: 4.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump a,
  .page-about .v-drawer summary::after,
  .page-about .team-tabs .tab {
    transition: none;
  }
}