/* ===== 品牌介绍页 专属样式 ===== */
.page-about {
  --about-accent: var(--color-red, #E63946);
  --about-timeline-w: 2px;
  --about-card-border: var(--color-blue, #1D3557);
  --about-bg-alt: var(--color-cream, #F1FAEE);
  --about-hero-bg: var(--color-blue, #1D3557);
  --about-hero-text: var(--color-light, #F1FAEE);
  --about-map-bg: var(--color-gold, #F4A261);
  background: var(--color-cream, #F1FAEE);
  padding-bottom: 4rem;
}

/* 容器 */
.page-about .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 0 1rem;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-sm, 14px);
  color: var(--color-dark, #0B1D2A);
  border-bottom: var(--border-w, 1px) solid var(--color-grid, #A8DADC);
  margin-bottom: 2rem;
}
.page-about .breadcrumb a {
  color: var(--color-blue, #1D3557);
  text-decoration: none;
  transition: color var(--transition, 0.2s ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus {
  color: var(--color-red, #E63946);
  text-decoration: underline;
}
.page-about .breadcrumb-sep {
  color: var(--color-grid, #A8DADC);
}
.page-about .breadcrumb [aria-current="page"] {
  font-weight: var(--weight-data, 700);
  color: var(--color-dark, #0B1D2A);
}

/* 品牌强调 */
.page-about .about-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 1rem;
  background: var(--about-hero-bg);
  border: var(--border-w, 1px) solid var(--color-blue, #1D3557);
  margin-bottom: 3rem;
  text-align: center;
}
@media (min-width: 640px) {
  .page-about .about-hero {
    flex-direction: row;
    text-align: left;
    padding: 3rem 2rem;
  }
}
.page-about .hero-visual {
  flex-shrink: 0;
}
.page-about .hero-logo {
  display: block;
  max-width: 100%;
  height: auto;
  border: var(--border-w, 1px) solid var(--color-gold, #F4A261);
}
.page-about .hero-text {
  flex: 1;
}
.page-about .hero-text h1 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-2xl, 48px);
  color: var(--about-hero-text);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}
@media (min-width: 768px) {
  .page-about .hero-text h1 {
    font-size: var(--size-3xl, 64px);
  }
}
.page-about .hero-tagline {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-md, 20px);
  color: var(--color-gold, #F4A261);
  font-weight: var(--weight-body, 400);
  margin: 0;
}

/* 品牌动态：时间轴+地图 */
.page-about .about-timeline-section {
  margin-bottom: 3rem;
  padding: 2rem 0;
  border-top: var(--border-w, 1px) solid var(--color-grid, #A8DADC);
  border-bottom: var(--border-w, 1px) solid var(--color-grid, #A8DADC);
}
.page-about .about-timeline-section h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-xl, 32px);
  color: var(--color-dark, #0B1D2A);
  margin: 0 0 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--about-accent);
  display: inline-block;
}
.page-about .timeline-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
@media (min-width: 768px) {
  .page-about .timeline-layout {
    flex-direction: row;
    gap: 3rem;
  }
}
.page-about .timeline-col {
  flex: 2;
}
.page-about .map-col {
  flex: 1;
}
.page-about .timeline-track {
  position: relative;
  padding-left: 2rem;
  border-left: var(--about-timeline-w) solid var(--color-blue, #1D3557);
}
.page-about .timeline-node {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 1rem;
}
.page-about .timeline-node:last-child {
  margin-bottom: 0;
}
.page-about .node-marker {
  position: absolute;
  left: calc(-2rem - var(--about-timeline-w) - 12px);
  top: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--about-accent);
  color: var(--color-light, #F1FAEE);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: var(--size-xs, 12px);
  font-weight: var(--weight-data, 700);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition, 0.2s ease);
  border: 2px solid var(--color-blue, #1D3557);
}
.page-about .node-marker:hover,
.page-about .node-marker:focus-visible {
  transform: scale(1.15);
  background: var(--color-gold, #F4A261);
}
.page-about .node-content {
  padding: 0.5rem 0;
}
.page-about .node-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-lg, 24px);
  color: var(--color-dark, #0B1D2A);
  margin: 0 0 0.25rem;
}
.page-about .node-detail {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-sm, 14px);
  color: var(--color-dark, #0B1D2A);
  line-height: 1.6;
  margin-top: 0.5rem;
  padding: 0.75rem;
  background: var(--color-cream, #F1FAEE);
  border-left: 3px solid var(--about-accent);
}
.page-about .map-container {
  background: var(--about-map-bg);
  padding: 1.5rem;
  text-align: center;
  border: var(--border-w, 1px) solid var(--color-dark, #0B1D2A);
  position: relative;
}
.page-about .map-img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}
.page-about .map-caption {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-sm, 14px);
  color: var(--color-dark, #0B1D2A);
  font-weight: var(--weight-data, 700);
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: var(--border-w, 1px) solid var(--color-dark, #0B1D2A);
}

/* 核心优势 */
.page-about .about-advantages {
  margin-bottom: 3rem;
  padding: 2rem 0;
}
.page-about .about-advantages h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-xl, 32px);
  color: var(--color-dark, #0B1D2A);
  margin: 0 0 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--about-accent);
  display: inline-block;
}
.page-about .advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 640px) {
  .page-about .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .page-about .advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.page-about .advantage-card {
  background: var(--color-cream, #F1FAEE);
  border: var(--border-w, 1px) solid var(--about-card-border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: box-shadow var(--transition, 0.2s ease), transform var(--transition, 0.2s ease);
}
.page-about .advantage-card:hover,
.page-about .advantage-card:focus-within {
  box-shadow: 4px 4px 0 var(--about-accent);
  transform: translate(-2px, -2px);
}
.page-about .card-icon {
  flex-shrink: 0;
}
.page-about .card-icon svg {
  display: block;
}
.page-about .card-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-md, 20px);
  color: var(--color-dark, #0B1D2A);
  margin: 0;
}
.page-about .card-desc {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-sm, 14px);
  color: var(--color-dark, #0B1D2A);
  line-height: 1.6;
  margin: 0;
}

/* 数据承诺 */
.page-about .about-commitment {
  margin-bottom: 3rem;
  padding: 2rem 0;
  border-top: var(--border-w, 1px) solid var(--color-grid, #A8DADC);
  border-bottom: var(--border-w, 1px) solid var(--color-grid, #A8DADC);
}
.page-about .about-commitment h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-xl, 32px);
  color: var(--color-dark, #0B1D2A);
  margin: 0 0 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--about-accent);
  display: inline-block;
}
.page-about .commitment-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
@media (min-width: 768px) {
  .page-about .commitment-layout {
    flex-direction: row;
    gap: 3rem;
  }
}
.page-about .commitment-visual {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .data-chart {
  background: var(--color-cream, #F1FAEE);
  border: var(--border-w, 1px) solid var(--color-blue, #1D3557);
  padding: 1.5rem;
}
.page-about .chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  height: 150px;
  padding-bottom: 2rem;
  border-bottom: var(--border-w, 1px) solid var(--color-dark, #0B1D2A);
}
.page-about .bar-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}
.page-about .bar {
  width: 100%;
  min-width: 30px;
  max-width: 80px;
  background: var(--about-accent);
  border: var(--border-w, 1px) solid var(--color-blue, #1D3557);
  cursor: pointer;
  transition: opacity var(--transition, 0.2s ease), transform var(--transition, 0.2s ease);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 0.25rem;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: var(--size-xs, 12px);
  color: var(--color-light, #F1FAEE);
  font-weight: var(--weight-data, 700);
}
.page-about .bar:hover,
.page-about .bar:focus-visible {
  opacity: 0.85;
  transform: scaleX(1.05);
  background: var(--color-gold, #F4A261);
}
.page-about .bar-label {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-xs, 12px);
  color: var(--color-dark, #0B1D2A);
}
.page-about .chart-detail {
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--color-cream, #F1FAEE);
  border-left: 3px solid var(--about-accent);
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-sm, 14px);
  color: var(--color-dark, #0B1D2A);
  line-height: 1.6;
}
.page-about .data-flow {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-about .data-flow svg {
  flex-shrink: 0;
}
.page-about .flow-text {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: var(--size-xs, 12px);
  color: var(--color-blue, #1D3557);
  margin: 0;
}
.page-about .commitment-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .commitment-text p {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-base, 16px);
  color: var(--color-dark, #0B1D2A);
  line-height: 1.7;
  margin: 0;
}
.page-about .commitment-img {
  display: block;
  max-width: 100%;
  height: auto;
  border: var(--border-w, 1px) solid var(--color-blue, #1D3557);
  margin-top: 0.5rem;
}

/* 品牌价值 */
.page-about .about-values {
  padding: 2rem 0;
  text-align: center;
}
.page-about .about-values h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--size-xl, 32px);
  color: var(--color-dark, #0B1D2A);
  margin: 0 0 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--about-accent);
  display: inline-block;
}
.page-about .value-quote {
  max-width: 700px;
  margin: 0 auto 2rem;
  padding: 1.5rem 2rem;
  background: var(--color-cream, #F1FAEE);
  border-left: 4px solid var(--about-accent);
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--size-md, 20px);
  color: var(--color-dark, #0B1D2A);
  font-style: normal;
  line-height: 1.6;
}
.page-about .value-quote footer {
  margin-top: 1rem;
  font-size: var(--size-sm, 14px);
  color: var(--color-blue, #1D3557);
  font-weight: var(--weight-data, 700);
}
.page-about .value-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}
.page-about .btn-primary {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--color-red, #E63946);
  color: var(--color-light, #F1FAEE);
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-data, 700);
  font-size: var(--size-base, 16px);
  text-decoration: none;
  border: var(--border-w, 1px) solid var(--color-red, #E63946);
  transition: background var(--transition, 0.2s ease), color var(--transition, 0.2s ease);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: var(--color-gold, #F4A261);
  color: var(--color-dark, #0B1D2A);
  border-color: var(--color-gold, #F4A261);
}
.page-about .btn-secondary {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: transparent;
  color: var(--color-blue, #1D3557);
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--weight-data, 700);
  font-size: var(--size-base, 16px);
  text-decoration: none;
  border: var(--border-w, 1px) solid var(--color-blue, #1D3557);
  transition: background var(--transition, 0.2s ease), color var(--transition, 0.2s ease);
}
.page-about .btn-secondary:hover,
.page-about .btn-secondary:focus-visible {
  background: var(--color-blue, #1D3557);
  color: var(--color-light, #F1FAEE);
}

/* 通用辅助 */
.page-about [hidden] {
  display: none;
}

/* 移动端优先，窄屏横向溢出保护 */
.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .container {
  overflow: hidden;
}
@media (max-width: 639px) {
  .page-about .hero-text h1 {
    font-size: var(--size-xl, 32px);
  }
  .page-about .timeline-track {
    padding-left: 1.5rem;
  }
  .page-about .node-marker {
    left: calc(-1.5rem - var(--about-timeline-w) - 10px);
    width: 20px;
    height: 20px;
    font-size: var(--size-xs, 12px);
  }
  .page-about .chart-bars {
    height: 100px;
  }
  .page-about .bar {
    min-width: 24px;
  }
  .page-about .value-quote {
    padding: 1rem;
    font-size: var(--size-base, 16px);
  }
}