.page-about {
  --about-blue: var(--color-global-blue, #0a3c6b);
  --about-accent: var(--color-accent, #ff6b1a);
  --about-steel: var(--color-steel, #607d8b);
  --about-deep: var(--color-deep, #0a1c2e);
  --about-line: rgba(96, 125, 139, 0.18);
  --about-tint: var(--color-blue-tint, #eaf1f8);
  --about-orange-tint: var(--color-orange-tint, #fff1e8);
  --about-glass: rgba(255, 255, 255, 0.85);
  position: relative;
  overflow: clip;
  min-height: 72vh;
  background: linear-gradient(180deg, var(--color-mist, #f5f7fa) 0%, #eaf1f8 100%);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(96, 125, 139, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 125, 139, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
}

.page-about .about-wrap {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin-inline: auto;
  padding: 32px 20px 88px;
}

.page-about .about-shell {
  display: block;
}

/* 移动端：横向索引条 */
.page-about .about-rail {
  display: block;
  margin-bottom: 32px;
  padding: 16px;
  background: var(--about-glass);
  border: 1px solid var(--about-line);
  border-radius: 18px;
  box-shadow: var(--shadow-card, 0 1px 2px rgba(10, 28, 46, 0.05));
}

.page-about .about-rail__label {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--about-steel);
}

.page-about .about-rail__nav {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--color-white, #ffffff);
  border: 1px solid var(--about-line);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-charcoal, #212121);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about .about-rail__link:hover {
  border-color: var(--about-blue);
  color: var(--about-blue);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--about-accent);
}

.page-about .about-rail__foot {
  display: none;
}

/* 右侧内容 */
.page-about .about-content {
  min-width: 0;
}

.page-about .breadcrumbs {
  margin-bottom: 28px;
}

.page-about .about-hero {
  position: relative;
  margin-bottom: 64px;
  padding: 24px 20px 22px;
  border-left: 4px solid var(--about-accent);
  border-radius: 0 18px 18px 0;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.72));
  box-shadow: var(--shadow-card);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 16px;
  width: 72px;
  height: 72px;
  border: 14px solid rgba(10, 60, 107, 0.05);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-hero h1 {
  position: relative;
  margin: 10px 0 8px;
  font-family: var(--font-heading);
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
}

.page-about .about-hero__lead {
  position: relative;
  max-width: 600px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-steel);
}

/* 章节通用 */
.page-about .about-section {
  position: relative;
  margin-bottom: 72px;
  padding-left: 16px;
  border-left: 1px solid rgba(10, 60, 107, 0.12);
}

.page-about .about-section::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--about-accent);
}

.page-about .about-section__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
  padding: 12px 18px;
  border-radius: 14px;
  background: linear-gradient(90deg, rgba(10, 60, 107, 0.06), rgba(10, 60, 107, 0.02));
  border-left: 3px solid var(--about-blue);
}

.page-about .about-section__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--about-blue);
  background: var(--about-tint);
  padding: 6px 10px;
  border-radius: 8px;
}

.page-about .about-section__head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
}

.page-about .about-section__head .meta-index {
  display: none;
}

.page-about .about-section__body {
  font-size: 15px;
  line-height: 1.85;
  color: #3a3f45;
}

.page-about .about-section__body > p {
  margin: 0 0 16px;
}

/* 品牌档案面板 */
.page-about .about-intro-panel {
  display: grid;
  gap: 20px;
  padding: 24px 20px;
  background:
    radial-gradient(circle at 8% 12%, rgba(10, 60, 107, 0.05), transparent 160px),
    linear-gradient(135deg, var(--about-tint), var(--about-glass));
  border: 1px solid var(--about-line);
  border-radius: var(--radius, 22px);
  box-shadow: var(--shadow-card);
}

.page-about .about-intro-panel__title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--about-blue);
}

.page-about .about-intro-panel__text p {
  margin-bottom: 12px;
}

/* 图片 */
.page-about .about-media {
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--color-white, #ffffff);
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 成长轨迹 */
.page-about .about-growth-wrap {
  display: grid;
  gap: 28px;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 8px 20px;
  border-left: 2px solid rgba(10, 60, 107, 0.15);
  display: grid;
  gap: 28px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 24px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-white, #ffffff);
  border: 3px solid var(--about-blue);
}

.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-accent);
  background: var(--about-orange-tint);
  border-radius: 6px;
}

.page-about .about-timeline__card {
  background: var(--about-glass);
  border: 1px solid var(--about-line);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: var(--shadow-card);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-charcoal);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #4a4f55;
}

.page-about .about-media--chart img {
  aspect-ratio: 4 / 3;
}

/* 质量管理 */
.page-about .about-quality-panel {
  display: grid;
  gap: 24px;
  padding: 24px 20px;
  background:
    radial-gradient(circle at 10% 20%, rgba(10, 60, 107, 0.06), transparent 160px),
    linear-gradient(145deg, #ffffff, var(--about-tint));
  border: 1px solid var(--about-line);
  border-radius: var(--radius, 22px);
  box-shadow: var(--shadow-card);
}

.page-about .about-quality-panel__badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  padding: 20px 14px 18px;
  border: 1px solid var(--about-line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.8);
}

.page-about .about-badge__mark {
  width: 42px;
  height: 42px;
  margin-bottom: 8px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--about-blue), #1b5f9a);
  color: #ffffff;
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-about .about-badge__mark::after {
  content: "✓";
  font-size: 20px;
  color: #ffffff;
}

.page-about .about-badge__code {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--about-blue);
}

.page-about .about-badge__note {
  font-size: 13px;
  color: var(--about-steel);
}

.page-about .about-quality-panel__text h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--about-blue);
}

.page-about .about-quality-panel__text p {
  margin-bottom: 12px;
}

/* 服务生态 */
.page-about .about-ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 24px 0;
}

.page-about .about-sector-card {
  background: var(--about-glass);
  border: 1px solid var(--about-line);
  border-radius: 18px;
  padding: 22px 20px;
  box-shadow: var(--shadow-card);
}

.page-about .about-sector-card h3 {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 700;
  color: var(--about-blue);
}

.page-about .about-sector-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-sector-list li {
  padding: 6px 12px;
  background: var(--about-tint);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--about-blue);
}

.page-about .about-sector-card__stat {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--about-accent);
}

.page-about .about-sector-card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--about-steel);
}

.page-about .about-service-note {
  margin-top: 20px;
  padding: 24px;
  border-left: 4px solid var(--about-accent);
  border-radius: 0 16px 16px 0;
  background: var(--about-orange-tint);
}

.page-about .about-service-note h3 {
  margin: 6px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-charcoal);
}

.page-about .about-service-note p {
  margin: 0;
  color: #4a4f55;
}

.page-about .about-service-note a {
  color: var(--about-blue);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 团队文化 */
.page-about .about-media--panorama {
  margin-bottom: 24px;
}

.page-about .about-media--panorama img {
  aspect-ratio: 2 / 1;
}

.page-about .about-culture-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 24px 0;
}

.page-about .about-culture-card {
  border: 1px solid var(--about-line);
  border-radius: 18px;
  padding: 22px 20px;
  background: var(--color-white, #ffffff);
}

.page-about .about-culture-card__stat {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--about-blue);
}

.page-about .about-culture-card p:last-child {
  margin: 0;
  line-height: 1.75;
}

.page-about .about-values {
  margin-top: 24px;
  padding: 24px 20px;
  border-radius: 18px;
  background: var(--about-deep);
  text-align: center;
}

.page-about .about-values .meta-index {
  color: rgba(255, 255, 255, 0.55);
}

.page-about .about-values h3 {
  margin: 8px 0 8px;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: #ffffff;
}

.page-about .about-values p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

/* 收尾 CTA */
.page-about .about-outro {
  margin-top: 48px;
  padding: 36px 24px;
  border-radius: var(--radius, 22px);
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 107, 26, 0.18), transparent 260px),
    linear-gradient(135deg, var(--about-deep), #123a5f);
  color: #ffffff;
}

.page-about .about-outro .meta-index {
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-outro h2 {
  margin: 8px 0 12px;
  font-size: clamp(24px, 4vw, 32px);
  color: #ffffff;
}

.page-about .about-outro p {
  max-width: 560px;
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

@media (min-width: 768px) {
  .page-about .about-wrap {
    padding: 40px 28px 96px;
  }

  .page-about .about-intro-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: center;
    gap: 28px;
    padding: 28px;
  }

  .page-about .about-ecosystem-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-culture-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-quality-panel {
    grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
    align-items: center;
    gap: 28px;
    padding: 28px;
  }

  .page-about .about-section__head .meta-index {
    display: block;
    margin-left: auto;
    font-size: 12px;
    color: var(--about-steel);
  }
}

@media (min-width: 992px) {
  .page-about .about-wrap {
    padding: 48px 40px 110px;
  }

  .page-about .about-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-height, 84px) + 24px);
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 0;
    padding: 24px 18px;
    border-radius: 20px;
    box-shadow: var(--shadow-glass, 0 8px 30px rgba(10, 28, 46, 0.08));
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    justify-content: flex-start;
    border: none;
    background: transparent;
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 15px;
  }

  .page-about .about-rail__link:hover {
    background: var(--about-tint);
  }

  .page-about .about-rail__foot {
    display: block;
    border-top: 1px solid var(--about-line);
    padding-top: 18px;
  }

  .page-about .about-rail__note {
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--about-steel);
  }

  .page-about .about-growth-wrap {
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .about-media--chart {
    position: sticky;
    top: calc(var(--header-height, 84px) + 32px);
  }
}