/* About Pages - 通用样式 */
:root {
  --primary-color: #007bff;
  --secondary-color: #2c3e50;
  --accent-color: #3498db;
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --text-light: #95a5a6;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --border-color: #ecf0f1;
  --shadow-light: 0 2px 10px rgba(0,0,0,0.08);
  --shadow-medium: 0 4px 20px rgba(0,0,0,0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* About页面样式 */
.about-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* 页面标题区域 */
.page-header {
  background: linear-gradient(135deg, var(--primary-color), #0056b3);
  color: white;
  padding: 60px 0 40px;
  text-align: center;
}

.breadcrumb-nav {
  margin-bottom: 20px;
  font-size: 14px;
}

.breadcrumb-link {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: color 0.3s;
}

.breadcrumb-link:hover {
  color: white;
}

.breadcrumb-separator {
  margin: 0 8px;
  color: rgba(255,255,255,0.6);
}

.breadcrumb-current {
  color: white;
  font-weight: 500;
}

.page-title {
  font-size: 48px;
  font-weight: 700;
  margin: 0 0 16px 0;
  letter-spacing: -1px;
}

.page-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.9);
  margin: 0;
  font-weight: 400;
}

/* 主要内容区域 */
.about-content {
  padding: 60px 0;
}

.about-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}

.about-image {
  width: 100%;
  height: 300px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-color), #0056b3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.featured-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-body {
  padding: 40px;
}

.about-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 24px 0;
  line-height: 1.2;
}

.about-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.about-text h1,
.about-text h2,
.about-text h3,
.about-text h4,
.about-text h5,
.about-text h6 {
  color: var(--text-primary);
  margin: 24px 0 16px 0;
  font-weight: 600;
}

.about-text h1 { font-size: 28px; }
.about-text h2 { font-size: 24px; }
.about-text h3 { font-size: 20px; }
.about-text h4 { font-size: 18px; }
.about-text h5 { font-size: 16px; }
.about-text h6 { font-size: 14px; }

.about-text p {
  margin: 0 0 16px 0;
}

.about-text ul,
.about-text ol {
  margin: 16px 0;
  padding-left: 24px;
}

.about-text li {
  margin: 8px 0;
}

.about-text img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 16px 0;
  box-shadow: var(--shadow-light);
}

.about-text a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s;
}

.about-text a:hover {
  color: #0056b3;
  text-decoration: underline;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  max-width: 500px;
  margin: 0 auto;
}

.empty-icon {
  color: var(--text-light);
  margin-bottom: 24px;
}

.empty-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 12px 0;
}

.empty-desc {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .page-header {
    padding: 40px 0 30px;
  }
  
  .page-title {
    font-size: 36px;
  }
  
  .page-subtitle {
    font-size: 16px;
  }
  
  .about-content {
    padding: 40px 0;
  }
  
  .about-body {
    padding: 24px;
  }
  
  .about-title {
    font-size: 24px;
  }
  
  .about-image {
    height: 200px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .about-body {
    padding: 20px;
  }
  
  .empty-state {
    padding: 60px 20px;
  }
}