/* 基础样式 */
:root {
  --primary-color: #4CAF50;
  --secondary-color: #8BC34A;
  --dark-color: #2E7D32;
  --light-color: #C8E6C9;
  --text-color: #333;
  --background-color: #f5f5f5;
}

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  text-align: center;
  transition: all 0.3s ease;
}

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

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

/* 卡片样式 */
.card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  padding: 20px;
  margin-bottom: 20px;
}

/* 头部样式 */
.main-header {
  background-color: #2E7D32;
  color: white;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: white;
  font-size: 24px;
  font-weight: bold;
}

.logo img {
  height: 40px;
  margin-right: 10px;
}

.main-nav ul {
  display: flex;
  list-style: none;
}

.main-nav li {
  margin: 0 15px;
}

.main-nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s;
}

.main-nav a:hover {
  opacity: 0.8;
}

/* 页脚样式 */
.main-footer {
  background-color: #1B5E20;
  color: white;
  padding: 40px 0 20px;
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-section h3 {
  margin-bottom: 20px;
  font-size: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding-bottom: 10px;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
  }
  
  .main-nav {
    margin: 15px 0;
  }
  
  .header-actions {
    width: 100%;
    display: flex;
    justify-content: center;
  }
}