/* 关于我们页面样式 */

/* 页面标题 */
.page-header {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
  color: white;
  text-align: center;
}

.page-title {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

.page-description {
  font-size: 1.25rem;
  opacity: 0.95;
}

/* 公司介绍 */
.intro-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.intro-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.intro-description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.intro-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.stat-card {
  background: white;
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.stat-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 600;
}

/* 核心优势 */
.advantage-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all 0.3s ease;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.advantage-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
}

.advantage-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.advantage-description {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 发展历程 */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
  transform: translateX(-50%);
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
  position: relative;
}

.timeline-item:nth-child(even) {
  direction: rtl;
}

.timeline-item:nth-child(even) > * {
  direction: ltr;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 20px;
  width: 20px;
  height: 20px;
  background: white;
  border: 4px solid var(--primary-color);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.1);
  z-index: 1;
}

.timeline-year {
  text-align: right;
  padding-right: 2rem;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.5;
}

.timeline-item:nth-child(even) .timeline-year {
  text-align: left;
  padding-right: 0;
  padding-left: 2rem;
}

.timeline-content {
  background: white;
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.timeline-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.timeline-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 联系方式 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.contact-card {
  background: white;
  padding: 2.5rem 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all 0.3s ease;
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.contact-card-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
}

.contact-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.contact-card-content {
  font-size: 1.125rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.contact-card-time {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .intro-content {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .page-header {
    padding: 120px 0 60px;
  }

  .page-title {
    font-size: 2.25rem;
  }

  .intro-title {
    font-size: 2rem;
  }

  .intro-stats {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    padding-left: 60px;
    gap: 0;
  }

  .timeline-item:nth-child(even) {
    direction: ltr;
  }

  .timeline-item::before {
    left: 20px;
    transform: translateX(0);
  }

  .timeline-year {
    text-align: left;
    padding-right: 0;
    padding-left: 0;
    margin-bottom: 1rem;
  }

  .timeline-item:nth-child(even) .timeline-year {
    text-align: left;
    padding-left: 0;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .page-title {
    font-size: 1.875rem;
  }

  .intro-title {
    font-size: 1.75rem;
  }

  .stat-card {
    padding: 1.5rem;
  }

  .stat-value {
    font-size: 2rem;
  }

  .advantage-card,
  .contact-card {
    padding: 2rem 1.5rem;
  }
}