:root {
  --primary-color: #4CAF50;
  --primary-light: #81C784;
  --primary-dark: #388E3C;
  --text-primary: #333333;
  --text-secondary: #666666;
  --bg-color: #F5F7F5;
  --white: #FFFFFF;
  --border-color: #E0E0E0;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
}

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
}

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

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

.btn-outline {
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  background-color: transparent;
}

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

/* 输入框通用样式 */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 14px;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

/* 顶部导航栏 */
.navbar {
  background-color: var(--white);
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-item {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 500;
  padding: 10px 0;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
  color: var(--primary-color);
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--primary-color);
  transition: var(--transition);
  border-radius: 3px;
}

.nav-item.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.search-bar {
  display: flex;
  align-items: center;
  background-color: var(--bg-color);
  border-radius: 20px;
  padding: 5px 15px;
  width: 300px;
}

.search-bar input {
  border: none;
  background: transparent;
  padding: 8px;
  width: 100%;
  outline: none;
}

.search-btn {
  background: transparent;
  color: var(--text-secondary);
}

.user-actions {
  display: flex;
  align-items: center;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--primary-light);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  cursor: pointer;
}

/* 主内容区 */
.main-content {
  flex: 1;
  padding: 30px 40px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .navbar {
    padding: 0 20px;
  }
  
  .search-bar {
    display: none;
  }
}