.page-about {
  --page-gold-glow: rgba(212, 175, 55, 0.16);
  --page-space-soft: rgba(45, 95, 138, 0.18);
  --page-cream-soft: rgba(245, 240, 230, 0.05);
  background-color: var(--deep-black);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
}

.page-about section[id] {
  scroll-margin-top: 24px;
}

/* 面包屑 */
.page-about .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 28px;
  font-size: 13px;
  color: var(--text-muted);
}
.page-about .crumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 200ms ease;
}
.page-about .crumb a:hover {
  color: var(--gold);
}
.page-about .crumb-sep {
  opacity: 0.5;
}

/* 超大章节编号 */
.page-about .section-no {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  user-select: none;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
}
.page-about .hero-no {
  top: 10px;
  right: -10px;
  font-size: clamp(110px, 30vw, 250px);
  color: rgba(45, 95, 138, 0.20);
}
.page-about .section-head .section-no {
  top: -72px;
  right: -12px;
  font-size: clamp(96px, 18vw, 220px);
  color: rgba(212, 175, 55, 0.10);
}

/* 故事首屏 */
.page-about .story-hero {
  position: relative;
  padding-top: 28px;
}
.page-about .story-hero-inner {
  display: grid;
  gap: 32px;
  align-items: center;
}
.page-about .hero-copy {
  position: relative;
  z-index: 1;
}
.page-about .page-kicker {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 999px;
  padding: 6px 14px;
  background: rgba(212, 175, 55, 0.06);
}
.page-about .hero-title {
  position: relative;
  z-index: 1;
  margin: 20px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(34px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  text-shadow: 0 0 24px var(--page-gold-glow);
}
.page-about .h1-main {
  display: block;
  color: var(--gold);
}
.page-about .h1-sub {
  display: block;
  margin-top: 10px;
  font-size: 0.62em;
  font-weight: 600;
  color: var(--text-secondary);
}
.page-about .hero-lead {
  position: relative;
  z-index: 1;
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
}
.page-about .hero-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .hero-figure {
  position: relative;
  z-index: 1;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--gray-line);
  border-radius: 22px;
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  aspect-ratio: 16 / 9;
  transform: rotate(1.2deg);
}
.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 首屏数据快照 */
.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 40px;
  padding-block: 24px;
  border-top: 1px solid var(--gray-line);
  border-bottom: 1px solid var(--gray-line);
}
.page-about .hero-fact {
  text-align: center;
  padding-inline: 6px;
}
.page-about .fact-value {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  color: var(--gold);
}
.page-about .fact-label {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

/* 章节索引 */
.page-about .chapter-index {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  padding-top: 44px;
  font-size: 14px;
}
.page-about .chapter-index a {
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 4px;
  transition: color 260ms ease, border-color 260ms ease;
}
.page-about .chapter-index a span {
  font-family: var(--font-data);
  color: var(--gold);
  margin-right: 4px;
}
.page-about .chapter-index a:hover {
  color: var(--gold);
  border-bottom-color: rgba(212, 175, 55, 0.4);
}

/* 区块通用 */
.page-about .section-head {
  position: relative;
  padding-top: 8px;
}
.page-about .section-title {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(28px, 4.5vw, 46px);
  line-height: 1.2;
}
.page-about .section-desc {
  position: relative;
  z-index: 1;
  max-width: 62ch;
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--text-secondary);
}

/* 发展历程 */
.page-about .journey {
  padding-top: 72px;
}
.page-about .journey-wrap {
  display: grid;
  gap: 32px;
  margin-top: 36px;
}
.page-about .journey-figure {
  align-self: start;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--gray-line);
  border-radius: 18px;
  background: var(--bg-card);
  aspect-ratio: 4 / 3;
}
.page-about .journey-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold), var(--space-blue) 70%, transparent);
}
.page-about .timeline-item {
  position: relative;
  padding-left: 38px;
  margin-bottom: 22px;
}
.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.16);
}
.page-about .timeline-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 4px 0;
  background: none;
  border: 0;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}
.page-about .tl-year {
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--gold);
  white-space: nowrap;
}
.page-about .tl-arrow {
  margin-left: auto;
  font-family: var(--font-data);
  color: var(--text-muted);
  transition: transform 300ms var(--ease-swift);
}
.page-about .timeline-item.is-open .tl-arrow,
.page-about .timeline-toggle[aria-expanded="true"] .tl-arrow {
  transform: rotate(45deg);
}
.page-about .timeline-panel-inner {
  overflow: hidden;
  padding-bottom: 6px;
  font-size: 15px;
  color: var(--text-secondary);
}
.page-about .timeline-panel-inner p {
  margin: 2px 0 6px;
}
.page-about .timeline-panel-inner a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
  transition: border-color 220ms ease;
}
.page-about .timeline-panel-inner a:hover {
  border-bottom-color: var(--gold);
}

/* 星轨 SVG */
.page-about .journey-orbit {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 28px;
}
.page-about .orbit-line-bg {
  fill: none;
  stroke: var(--space-blue);
  stroke-width: 10;
  opacity: 0.12;
}
.page-about .orbit-line-fg {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.6;
  stroke-dasharray: 6 12;
  opacity: 0.4;
}
.page-about .orbit-star-gold {
  fill: var(--gold);
}
.page-about .orbit-star-blue {
  fill: var(--space-blue-light);
}

/* 核心能力 */
.page-about .capabilities {
  padding-top: 72px;
}
.page-about .cap-accordion {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}
.page-about .cap-acc-item {
  border: 1px solid var(--gray-line);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(45, 95, 138, 0.10), rgba(11, 13, 23, 0.4));
  padding: 0 22px;
  transition: border-color 280ms ease, background 280ms ease;
}
.page-about .cap-acc-item:hover {
  border-color: rgba(212, 175, 55, 0.35);
  background: linear-gradient(135deg, rgba(45, 95, 138, 0.16), rgba(11, 13, 23, 0.5));
}
.page-about .cap-accordion .accordion-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 18px 0;
  border: 0;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}
.page-about .acc-index {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--gold);
}
.page-about .acc-title {
  flex: 1;
}
.page-about .cap-accordion .accordion-panel-inner {
  max-width: 78ch;
  padding-bottom: 20px;
  color: var(--text-secondary);
  font-size: 15px;
}
.page-about .acc-metric {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 14px;
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--text-muted);
}
.page-about .cap-note {
  margin: 40px auto 0;
  max-width: 680px;
  border-left: 3px solid var(--gold);
  border-radius: 0 14px 14px 0;
  padding: 20px 26px;
  background: var(--page-cream-soft);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 16px;
  line-height: 1.8;
}
.page-about .cap-note p {
  margin: 0;
}

/* 荣誉与认可 */
.page-about .honors {
  padding-top: 72px;
}
.page-about .honor-grid {
  display: grid;
  gap: 22px;
  margin-top: 40px;
}
.page-about .honor-card {
  position: relative;
  overflow: hidden;
  padding: 24px 24px 18px;
  border: 1px solid var(--gray-line);
  border-radius: 20px;
  background: var(--bg-card-solid);
  transition: border-color 300ms ease, transform 300ms var(--ease-swift);
}
.page-about .honor-card:hover {
  border-color: rgba(212, 175, 55, 0.35);
  transform: translateY(-4px);
}
.page-about .honor-medal {
  display: block;
  width: 64px;
  height: 64px;
  margin-bottom: 12px;
  color: var(--gold);
}
.page-about .honor-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1.4;
}
.page-about .honor-card p {
  margin: 0;
  font-size: 15px;
  color: var(--text-secondary);
}
.page-about .honor-detail {
  display: block;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  padding-top: 0;
  border-top: 1px solid transparent;
  font-size: 14px;
  color: var(--text-muted);
  transition: max-height 400ms ease, opacity 400ms ease, margin-top 400ms ease, padding-top 400ms ease;
}
.page-about .honor-card:hover .honor-detail,
.page-about .honor-card:focus-within .honor-detail {
  max-height: 120px;
  opacity: 1;
  margin-top: 12px;
  padding-top: 10px;
  border-top-color: var(--gray-line);
}
.page-about .honor-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--gray-line);
  border-radius: 20px;
  aspect-ratio: 1 / 1;
}
.page-about .honor-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 生态与合规 */
.page-about .ecosystem {
  display: grid;
  gap: 18px;
  margin-top: 32px;
  padding: 24px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--page-space-soft), transparent);
}
.page-about .eco-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--gold);
}
.page-about .eco-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* 服务承诺 */
.page-about .commitments {
  padding-top: 72px;
  padding-bottom: 64px;
}
.page-about .promise-grid {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}
.page-about .promise-item {
  padding: 22px;
  border: 1px solid var(--gray-line);
  border-radius: 18px;
  background: rgba(45, 95, 138, 0.06);
  transition: border-color 280ms ease, background 280ms ease;
}
.page-about .promise-item:hover {
  border-color: rgba(212, 175, 55, 0.3);
  background: rgba(45, 95, 138, 0.12);
}
.page-about .promise-no {
  font-family: var(--font-data);
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.page-about .promise-title {
  margin: 8px 0 6px;
  font-family: var(--font-heading);
  font-size: 18px;
}
.page-about .promise-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-secondary);
}
.page-about .promise-cta {
  margin-top: 44px;
  padding: 36px 28px;
  border: 1px solid var(--gray-line);
  border-radius: 22px;
  text-align: center;
  background:
    radial-gradient(circle at 30% 20%, rgba(45, 95, 138, 0.3), transparent 55%),
    radial-gradient(circle at 80% 70%, rgba(212, 175, 55, 0.12), transparent 48%),
    var(--bg-card-solid);
}
.page-about .promise-cta-text {
  max-width: 42ch;
  margin: 0 auto 22px;
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1.7;
  color: var(--text-primary);
}
.page-about .promise-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* 滚动显现动画 */
.page-about .reveal[data-reveal] {
  transition: transform 700ms var(--ease-swift), opacity 700ms ease;
}
.page-about .reveal[data-reveal]:not(.is-visible) {
  transform: translateX(-36px);
  opacity: 0.35;
}
.page-about .hero-figure.reveal[data-reveal]:not(.is-visible) {
  transform: translateX(36px) rotate(1.2deg);
  opacity: 0.3;
}

/* 无脚本时内容完整可见 */
.page-about .accordion-panel,
.page-about .timeline-panel {
  display: block;
  opacity: 1;
}
@media (scripting: enabled) {
  .page-about .accordion-panel,
  .page-about .timeline-panel {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
  }
  .page-about .accordion-item.is-open .accordion-panel,
  .page-about .accordion-panel[data-open],
  .page-about .timeline-item.is-open .timeline-panel,
  .page-about .timeline-panel[data-open] {
    grid-template-rows: 1fr;
    opacity: 1;
  }
}

/* 断点：平板及以上 */
@media (min-width: 720px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .page-about .promise-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .honor-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .ecosystem {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .story-hero-inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }
  .page-about .journey-wrap {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
  }
  .page-about .journey-figure {
    position: sticky;
    top: 24px;
  }
  .page-about .hero-no {
    top: 0;
    right: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .promise-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .honor-grid {
    grid-template-columns: repeat(2, 1fr) 0.85fr;
    align-items: stretch;
  }
  .page-about .section-head .section-no {
    top: -90px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about :where(.reveal, .cap-acc-item, .promise-item, .honor-card) {
    transition: none;
  }
}