.page-about {
  --color-primary: #FF6B35;
  --color-secondary: #003F5C;
  --color-accent: #00E676;
  --color-background: #FDF6E3;
  --color-text: #2C1E16;
  --color-red: #D94A3D;
  --color-gray: #607D8B;
  --color-shadow: rgba(44,30,22,0.8);
  --color-white: #FDF6E3;
  --font-primary: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-heading: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  --border-width: 4px;
  --border-radius: 4px;
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-lg: 0 6px 24px var(--color-shadow);
  --transition: 0.2s ease;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: min(92%, 1200px);
  margin: 0 auto;
  padding: 1.25rem 0 0.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem 0.5rem;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  color: var(--color-gray);
}

.page-about .breadcrumb-link {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity var(--transition);
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  opacity: 0.7;
}

.page-about .breadcrumb-sep {
  color: var(--color-gray);
  font-weight: 300;
}

.page-about .breadcrumb-current {
  color: var(--color-text);
  font-weight: 600;
}

/* 通用容器 */
.page-about .container {
  max-width: min(92%, 1200px);
  margin: 0 auto;
  padding: 0;
}

/* 节标题 */
.page-about .section-label {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  font-style: italic;
  color: var(--color-secondary);
  margin: 0 0 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: var(--border-width) solid var(--color-primary);
  padding-bottom: 0.5rem;
}

.page-about .section-label .nav-index {
  font-family: var(--font-mono);
  font-size: 0.75em;
  color: var(--color-primary);
  font-style: normal;
}

/* 按钮 */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  border: var(--border-width) solid var(--color-primary);
  border-radius: var(--border-radius);
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.page-about .btn:hover,
.page-about .btn:focus-visible {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
}

.page-about .btn-outline {
  background: transparent;
  color: var(--color-primary);
}

.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  padding: 2.5rem 0 3rem;
}

.page-about .hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

.page-about .hero-text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about .hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.page-about .hero-kicker[data-nav-index]::before {
  content: attr(data-nav-index);
  font-weight: 700;
}

.page-about .hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800;
  font-style: italic;
  color: var(--color-secondary);
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-about .hero-declaration {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 400;
  color: var(--color-text);
  max-width: 32em;
  line-height: 1.6;
  margin: 0;
}

.page-about .hero-mission {
  font-size: 1rem;
  color: var(--color-gray);
  max-width: 28em;
  line-height: 1.6;
  margin: 0;
}

.page-about .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-secondary);
  color: var(--color-white);
  padding: 0.375rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  align-self: flex-start;
  box-shadow: var(--shadow-sm);
}

.page-about .live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
  flex-shrink: 0;
}

.page-about .hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-about .hero-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--border-width) solid var(--color-secondary);
  box-shadow: var(--shadow-lg);
  border-radius: var(--border-radius);
}

/* ===== 核心能力卡片区 ===== */
.page-about .about-core {
  padding: 2rem 0 3rem;
}

.page-about .core-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .core-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: var(--border-width) solid var(--color-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.page-about .core-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.page-about .core-card-visual {
  flex-shrink: 0;
  background: var(--color-background);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-bottom: 2px solid var(--color-gray);
}

.page-about .core-card-img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  border-radius: calc(var(--border-radius) / 2);
}

.page-about .core-card-body {
  padding: 1.25rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  flex: 1;
}

.page-about .core-card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-secondary);
  margin: 0;
}

.page-about .core-card-desc {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.6;
  margin: 0;
}

.page-about .core-card-detail[data-detail] {
  font-size: 0.875rem;
  color: var(--color-gray);
  line-height: 1.7;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  opacity: 0;
}

.page-about .core-card-detail[data-detail][aria-hidden="false"] {
  max-height: 300px;
  opacity: 1;
}

.page-about .core-card-toggle {
  align-self: flex-start;
  margin-top: auto;
  font-size: 0.8125rem;
  padding: 0.375rem 1rem;
}

/* ===== 本地特色区 ===== */
.page-about .about-local {
  padding: 2rem 0 3rem;
  background: var(--color-background);
}

.page-about .local-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about .local-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about .local-slogan {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  font-style: italic;
  color: var(--color-accent);
  background: var(--color-secondary);
  display: inline-block;
  padding: 0.25rem 1.25rem;
  border-radius: var(--border-radius);
  align-self: flex-start;
  box-shadow: var(--shadow-sm);
  line-height: 1.3;
}

.page-about .accent-text {
  color: var(--color-accent);
}

.page-about .local-desc {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
  max-width: 34em;
  margin: 0;
}

.page-about .local-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-about .local-list li {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.5;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.page-about .local-list-icon {
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.page-about .local-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-about .local-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--border-width) solid var(--color-secondary);
  box-shadow: var(--shadow-lg);
  border-radius: var(--border-radius);
}

.page-about .local-caption {
  font-size: 0.8125rem;
  color: var(--color-gray);
  font-family: var(--font-mono);
  text-align: center;
}

/* ===== CTA 区 ===== */
.page-about .about-cta {
  padding: 2.5rem 0 3.5rem;
}

.page-about .cta-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  font-style: italic;
  color: var(--color-secondary);
  text-align: center;
  margin: 0 0 1.5rem;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* ===== 响应式：平板以上 ===== */
@media (min-width: 640px) {
  .page-about .hero-layout {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .hero-visual {
    justify-content: flex-end;
  }

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

  .page-about .core-card {
    flex-direction: row;
  }

  .page-about .core-card-visual {
    width: 150px;
    flex-shrink: 0;
    border-bottom: none;
    border-right: 2px solid var(--color-gray);
    padding: 0.75rem;
  }

  .page-about .local-layout {
    grid-template-columns: 2fr 1fr;
    align-items: center;
  }

  .page-about .local-figure {
    align-items: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 3.5rem 0 4rem;
  }

  .page-about .core-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

  .page-about .about-core {
    padding: 3rem 0 4rem;
  }

  .page-about .about-local {
    padding: 3rem 0 4rem;
  }

  .page-about .hero-title {
    font-size: 4.5rem;
  }

  .page-about .cta-links {
    gap: 1.5rem;
  }
}

/* ===== 移动端额外优化 ===== */
@media (max-width: 639px) {
  .page-about .hero-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
  }

  .page-about .core-card-toggle {
    width: 100%;
  }

  .page-about .local-slogan {
    font-size: 1.5rem;
  }

  .page-about .cta-links .btn {
    width: 100%;
  }
}