/* 主要样式文件 */

/* 自定义CSS变量 */
:root {
  --primary-color: #2563eb;
  --secondary-color: #7c3aed;
  --accent-color: #059669;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
}

/* 基础样式重置 */
* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* 链接样式 */
a {
  text-decoration: none;
  transition: color 0.3s ease;
}

/* 按钮基础样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: #1d4ed8;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
}

/* 卡片样式 */
.card {
  background: var(--bg-primary);
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  transform: translateY(-2px);
}

/* 渐变背景 */
.gradient-bg {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

/* 响应式图片 */
.responsive-img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 淡入动画 */
.fade-in {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 移动端优化 */
@media (max-width: 768px) {
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
  
  .card {
    margin: 0 1rem;
  }
}

/* 打印样式 */
@media print {
  .no-print {
    display: none !important;
  }
}