/* 全局样式 */
:root {
  --primary-color: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary-color: #64748b;
  --secondary-light: #94a3b8;
  --secondary-dark: #475569;
  --background-color: #f8fafc;
  --surface-color: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

/* 容器样式 */
.about-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 英雄区域 */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  padding: 80px 0;
  text-align: center;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  margin-bottom: 40px;
}

.hero-content h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  font-weight: 700;
}

.subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
}

/* 通用部分样式 */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header h2 {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.divider {
  width: 80px;
  height: 4px;
  background-color: var(--primary-color);
  margin: 0 auto;
  border-radius: 2px;
}

/* 关于部分 */
.about-content {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
  margin-bottom: 60px;
}

.about-text {
  flex: 1;
  min-width: 300px;
}

.about-text p {
  margin-bottom: 20px;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.about-image {
  flex: 1;
  min-width: 300px;
}

/* 时间线 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto 60px;
  padding-left: 50px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--primary-light);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-date {
  position: absolute;
  left: -50px;
  top: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.timeline-content {
  background-color: var(--surface-color);
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.timeline-content h3 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

/* 团队部分 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.team-member {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.team-member:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.member-image {
  height: 200px;
  overflow: hidden;
}

.member-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.team-member:hover .member-image img {
  transform: scale(1.05);
}

.member-info {
  padding: 20px;
}

.member-info h3 {
  margin-bottom: 5px;
  color: var(--text-primary);
}

.position {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 10px;
}

.bio {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* 价值观部分 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.value-card {
  background-color: var(--surface-color);
  padding: 30px;
  border-radius: var(--border-radius);
  text-align: center;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-5px);
}

.value-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.value-card h3 {
  margin-bottom: 15px;
  color: var(--text-primary);
}

.value-card p {
  color: var(--text-secondary);
}

/* 使命部分 */
.mission-section {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 60px 0;
  text-align: center;
  border-radius: var(--border-radius);
  margin-bottom: 60px;
}

.mission-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.mission-content h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.mission-statement {
  font-size: 1.25rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  background-color: white;
  color: var(--primary-color);
  padding: 12px 24px;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
}

.cta-button:hover {
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.cta-button i {
  margin-left: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1.1rem;
  }
  
  .about-content {
    flex-direction: column;
  }
  
  .timeline {
    padding-left: 30px;
  }
  
  .timeline::before {
    left: 10px;
  }
  
  .timeline-date {
    left: -30px;
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding: 60px 0;
  }
  
  .section-header h2 {
    font-size: 1.5rem;
  }
  
  .team-grid {
    grid-template-columns: 1fr;
  }
  
  .values-grid {
    grid-template-columns: 1fr;
  }
}