/* ===== 品牌故事页 · 专属样式 ===== */
.page-about {
  --about-bg: var(--dark-bg);
  --about-card-bg: var(--deep-sea-blue);
  --about-glass: var(--glass-white);
  --about-gold: var(--gold-highlight);
  --about-orange: var(--vibrant-orange);
  --about-text-light: var(--text-primary);
  --about-text-muted: var(--text-secondary);
  --about-radius: 12px;
  --about-spacing: 2.5rem;
  background: var(--about-bg);
  color: var(--about-text-light);
  font-family: var(--font-body);
  line-height: 1.6;
  padding: 0 1rem 3rem;
  min-height: 70vh;
}

.page-about .page-about-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-top: 1.5rem;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  padding: 0.5rem 0 1.5rem;
  color: var(--about-text-muted);
  letter-spacing: 0.02em;
}
.page-about .breadcrumb-link {
  color: var(--about-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--about-gold);
}
.page-about .breadcrumb-sep {
  color: var(--about-text-muted);
  opacity: 0.5;
}
.page-about .breadcrumb-current {
  color: var(--about-gold);
  font-weight: 600;
}

/* ===== 首屏英雄区 ===== */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 1rem 0 2.5rem;
}
.page-about .hero-text-block {
  order: 2;
}
.page-about .hero-kicker {
  display: inline-block;
  font-family: var(--font-caption);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--about-gold);
  text-transform: uppercase;
  border-left: 3px solid var(--about-gold);
  padding-left: 0.75rem;
  margin-bottom: 0.75rem;
}
.page-about .hero-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 2.8rem;
  letter-spacing: 0.03em;
  line-height: 1.15;
  margin: 0 0 0.6rem;
  color: var(--about-text-light);
}
.page-about .hero-subtitle {
  font-size: 1.2rem;
  color: var(--about-orange);
  font-weight: 600;
  margin-bottom: 1.2rem;
}
.page-about .hero-summary {
  font-size: 1rem;
  color: var(--about-text-muted);
  max-width: 580px;
  line-height: 1.7;
}
.page-about .hero-visual {
  order: 1;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--about-card-bg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.page-about .hero-image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 800 / 500;
}
.page-about .hero-stats-grid {
  order: 3;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-top: 0.5rem;
}
.page-about .stat-item {
  background: var(--about-glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--about-radius);
  padding: 1rem 0.75rem;
  text-align: center;
  border: 1px solid rgba(212, 175, 55, 0.15);
}
.page-about .stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: bold;
  color: var(--about-gold);
  line-height: 1.2;
}
.page-about .stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--about-text-muted);
  margin-top: 0.25rem;
  letter-spacing: 0.03em;
}

/* 金色分割 */
.page-about .gold-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--about-gold), transparent);
  margin: 2rem 0;
  opacity: 0.5;
}

/* ===== 章节头部 ===== */
.page-about .section-header {
  margin-bottom: 2rem;
}
.page-about .section-number {
  display: inline-block;
  font-family: var(--font-caption);
  font-size: 0.9rem;
  font-weight: bold;
  color: var(--about-gold);
  letter-spacing: 0.1em;
  border-bottom: 2px solid var(--about-gold);
  padding-bottom: 0.2rem;
  margin-bottom: 0.6rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 2rem;
  letter-spacing: 0.02em;
  margin: 0.3rem 0 0.6rem;
  color: var(--about-text-light);
}
.page-about .section-desc {
  font-size: 1.05rem;
  color: var(--about-text-muted);
  max-width: 600px;
  line-height: 1.6;
}

/* ===== 时间线区 ===== */
.page-about .about-timeline {
  padding: 1.5rem 0 2.5rem;
}
.page-about .timeline-track {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
  position: relative;
  padding-left: 1rem;
}
.page-about .timeline-track::before {
  content: '';
  position: absolute;
  left: 0.6rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--about-gold), var(--about-orange), var(--about-gold));
  opacity: 0.3;
}
.page-about .timeline-node {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  position: relative;
  padding-left: 2.2rem;
  cursor: default;
  transition: transform var(--transition);
}
.page-about .timeline-node:hover,
.page-about .timeline-node:focus-within {
  transform: translateX(4px);
}
.page-about .node-marker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.page-about .node-dot {
  display: block;
  width: 12px;
  height: 12px;
  background: var(--about-gold);
  border-radius: 50%;
  border: 2px solid var(--about-card-bg);
  box-shadow: 0 0 0 2px var(--about-gold);
  flex-shrink: 0;
}
.page-about .node-year {
  font-family: var(--font-caption);
  font-size: 0.85rem;
  font-weight: bold;
  color: var(--about-gold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.page-about .node-content {
  padding: 1rem 1.25rem;
  border-radius: var(--about-radius);
  background: var(--about-glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(212, 175, 55, 0.1);
  transition: background var(--transition), box-shadow var(--transition);
}
.page-about .timeline-node:hover .node-content,
.page-about .timeline-node:focus-within .node-content {
  background: rgba(0, 40, 69, 0.7);
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.08);
}
.page-about .node-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 1.15rem;
  margin: 0 0 0.3rem;
  color: var(--about-text-light);
}
.page-about .node-text {
  font-size: 0.92rem;
  color: var(--about-text-muted);
  margin: 0;
  line-height: 1.6;
}
.page-about .timeline-visual {
  margin-top: 1.5rem;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--about-card-bg);
}
.page-about .timeline-image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 600 / 400;
}

/* ===== 宽窄交替故事区 ===== */
.page-about .about-story-alt {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 2rem 0;
}
.page-about .alt-text-panel {
  order: 2;
}
.page-about .alt-text-panel .section-number {
  margin-bottom: 0.4rem;
}
.page-about .alt-paragraph {
  font-size: 1rem;
  color: var(--about-text-muted);
  line-height: 1.7;
  margin: 0 0 1rem;
}
.page-about .alt-image-panel {
  order: 1;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--about-card-bg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.page-about .alt-image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 600 / 400;
}
.page-about .btn-primary {
  display: inline-block;
  background: var(--about-orange);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.8rem;
  border-radius: var(--about-radius);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
  border: none;
  cursor: pointer;
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: #e64a19;
  transform: translateY(-2px);
}
.page-about .btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--about-gold);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.8rem;
  border-radius: var(--about-radius);
  text-decoration: none;
  transition: background var(--transition), border var(--transition);
  border: 1px solid var(--about-gold);
  cursor: pointer;
  margin-left: 0.75rem;
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: rgba(212, 175, 55, 0.1);
  border-color: var(--about-orange);
  color: var(--about-orange);
}

/* ===== 创新革新区 ===== */
.page-about .about-innovation {
  padding: 1.5rem 0 2.5rem;
}
.page-about .innovation-grid {
  margin: 2rem 0;
}
.page-about .innovation-card {
  padding: 1.5rem;
  border-radius: var(--about-radius);
  background: var(--about-card-bg);
  border: 1px solid rgba(212, 175, 55, 0.08);
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .innovation-card:hover,
.page-about .innovation-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(212, 175, 55, 0.06);
}
.page-about .card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}
.page-about .card-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
  color: var(--about-text-light);
}
.page-about .card-text {
  font-size: 0.92rem;
  color: var(--about-text-muted);
  line-height: 1.6;
  margin: 0;
}
.page-about .innovation-cta {
  margin-top: 2.5rem;
  padding: 1.5rem;
  text-align: center;
  background: var(--about-glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--about-radius);
  border: 1px solid rgba(212, 175, 55, 0.1);
}
.page-about .cta-text {
  font-size: 1.1rem;
  color: var(--about-text-light);
  margin-bottom: 1.2rem;
  font-weight: 600;
}

/* ===== 结尾重申 ===== */
.page-about .about-coda {
  padding: 2.5rem 0 1rem;
  text-align: center;
}
.page-about .coda-content {
  max-width: 650px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}
.page-about .coda-quote {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--about-gold);
  line-height: 1.5;
  margin: 0 0 0.6rem;
  letter-spacing: 0.02em;
}
.page-about .coda-meta {
  font-size: 0.9rem;
  color: var(--about-text-muted);
  margin: 0;
  letter-spacing: 0.05em;
}

/* ===== 网格 ===== */
.page-about .grid {
  display: grid;
  gap: 1.5rem;
}
.page-about .grid-2 {
  grid-template-columns: 1fr;
}

/* ===== 响应式（移动端优先） ===== */
@media (max-width: 640px) {
  .page-about {
    padding: 0 0.75rem 2rem;
  }
  .page-about .hero-title {
    font-size: 2rem;
  }
  .page-about .hero-subtitle {
    font-size: 1rem;
  }
  .page-about .hero-stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
  }
  .page-about .stat-number {
    font-size: 1.5rem;
  }
  .page-about .stat-label {
    font-size: 0.7rem;
  }
  .page-about .section-title {
    font-size: 1.5rem;
  }
  .page-about .timeline-track {
    padding-left: 0.5rem;
  }
  .page-about .timeline-node {
    padding-left: 1.6rem;
  }
  .page-about .innovation-cta .btn-outline {
    margin-left: 0;
    margin-top: 0.6rem;
    display: block;
  }
  .page-about .coda-quote {
    font-size: 1.15rem;
  }
}

/* ===== 桌面增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }
  .page-about .hero-text-block {
    order: 1;
  }
  .page-about .hero-visual {
    order: 2;
  }
  .page-about .hero-stats-grid {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, 1fr);
    max-width: 80%;
    margin: 0 auto;
  }
  .page-about .timeline-track {
    flex-direction: row;
    gap: 1.5rem;
    padding-left: 0;
    justify-content: space-between;
  }
  .page-about .timeline-track::before {
    left: 0;
    right: 0;
    top: 0.6rem;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--about-gold), var(--about-orange), var(--about-gold));
    opacity: 0.25;
  }
  .page-about .timeline-node {
    flex: 1;
    padding-left: 0;
    padding-top: 2rem;
    align-items: flex-start;
  }
  .page-about .node-marker {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .page-about .node-dot {
    width: 14px;
    height: 14px;
  }
  .page-about .node-content {
    width: 100%;
    min-height: 120px;
  }
  .page-about .about-story-alt {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .page-about .alt-text-panel {
    order: 1;
  }
  .page-about .alt-image-panel {
    order: 2;
  }
  .page-about .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding: 0 2rem 4rem;
  }
  .page-about .hero-title {
    font-size: 3.2rem;
  }
  .page-about .hero-stats-grid {
    max-width: 70%;
  }
  .page-about .innovation-grid {
    gap: 2rem;
  }
}