/* ============================================
   关于我们 - 页面样式
   ============================================ */

/* ---- 页面Banner ---- */
.page-banner {
  position: relative;
  padding: 140px 0 60px;
  margin-top: 64px;
  text-align: center;
  overflow: hidden;
}

.page-banner-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--bg-dark), var(--primary));
}

.page-banner-content {
  position: relative;
  z-index: 2;
  color: #fff;
}

.page-banner-content h1 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-banner-content p {
  font-size: 16px;
  opacity: 0.8;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 14px;
  opacity: 0.7;
}

.breadcrumb a {
  transition: var(--transition);
}

.breadcrumb a:hover {
  opacity: 1;
  color: var(--accent-light);
}

.breadcrumb i {
  font-size: 10px;
}

/* ---- 公司简介 ---- */
.about-intro-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 60px;
  align-items: center;
}

.about-intro-text .section-tag {
  text-align: left;
}

.about-intro-text h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--bg-dark);
  margin-bottom: 24px;
}

.about-intro-text p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-intro-text p strong {
  color: var(--primary);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.about-stat-item {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.about-stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.stat-number {
  display: block;
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.stat-number span {
  font-size: 24px;
}

.stat-label {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ---- 集团背景 时间线 ---- */
.about-group {
  background: var(--bg-light);
}

.group-timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.group-timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg-light);
  box-shadow: 0 0 0 3px var(--primary);
}

.timeline-content {
  background: var(--bg);
  padding: 24px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--accent);
}

.timeline-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- 企业理念 ---- */
.about-philosophy {
  background: var(--bg);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.philosophy-card {
  text-align: center;
  padding: 48px 32px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.philosophy-heart {
  background: linear-gradient(135deg, #ffebee, #fff);
  border: 1px solid #ffcdd2;
}

.philosophy-brain {
  background: linear-gradient(135deg, #e3f2fd, #fff);
  border: 1px solid #bbdefb;
}

.philosophy-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.philosophy-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.philosophy-heart .philosophy-icon {
  color: #c62828;
}

.philosophy-brain .philosophy-icon {
  color: #1565c0;
}

.philosophy-card h3 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 8px;
}

.philosophy-heart h3 {
  color: #c62828;
}

.philosophy-brain h3 {
  color: #1565c0;
}

.philosophy-meaning {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.philosophy-meaning strong {
  font-size: 22px;
}

.philosophy-card p:last-child {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

.philosophy-mission {
  text-align: center;
  background: var(--bg-light);
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.philosophy-mission h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
}

.philosophy-mission p {
  font-size: 15px;
  color: var(--text-light);
}

/* ---- 中山优势 ---- */
.about-advantage {
  background: var(--bg-light);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  margin: 0 auto 16px;
}

.advantage-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--bg-dark);
  margin-bottom: 8px;
}

.advantage-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .page-banner {
    padding: 120px 0 40px;
  }
  
  .page-banner-content h1 {
    font-size: 28px;
  }
  
  .about-intro-text h2 {
    font-size: 24px;
  }
  
  .about-stats {
    grid-template-columns: 1fr 1fr;
  }
  
  .philosophy-grid {
    grid-template-columns: 1fr;
  }
  
  .advantage-grid {
    grid-template-columns: 1fr;
  }
  
  .stat-number {
    font-size: 36px;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }
}