/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: #333;
  background-color: #f5f7fa;
}

/* 登录页面样式 */
.login-container {
  max-width: 400px;
  margin: 100px auto;
  padding: 30px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
}

.login-container h2 {
  text-align: center;
  margin-bottom: 30px;
  color: #333;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #666;
}

.form-control {
  width: 100%;
  padding: 10px 15px;
  border: 1px solid #dcdfe6;
  border-radius: 4px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: #409eff;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
}

.btn-primary {
  background-color: #409eff;
  color: #fff;
}

.btn-primary:hover {
  background-color: #66b1ff;
}

.btn-success {
  background-color: #67c23a;
  color: #fff;
}

.btn-success:hover {
  background-color: #85ce61;
}

.btn-warning {
  background-color: #e6a23c;
  color: #fff;
}

.btn-warning:hover {
  background-color: #ebb563;
}

.btn-danger {
  background-color: #f56c6c;
  color: #fff;
}

.btn-danger:hover {
  background-color: #f78989;
}

.btn-block {
  width: 100%;
}

/* 后台主页面样式 */
.admin-container {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
  width: 200px;
  background-color: #304156;
  color: #fff;
  padding: 20px 0;
}

.sidebar h3 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 18px;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  margin-bottom: 10px;
}

.sidebar a {
  display: block;
  padding: 12px 20px;
  color: #bfcbd9;
  text-decoration: none;
  transition: all 0.3s;
}

.sidebar a:hover {
  background-color: #409eff;
  color: #fff;
}

.sidebar a.active {
  background-color: #409eff;
  color: #fff;
}

/* 主内容区域 */
.main-content {
  flex: 1;
  padding: 20px;
  background-color: #f5f7fa;
}

/* 顶部导航栏 */
.top-nav {
  background-color: #fff;
  padding: 10px 20px;
  border-bottom: 1px solid #dcdfe6;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-nav h1 {
  font-size: 20px;
  color: #333;
}

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

.user-info span {
  margin-right: 15px;
  color: #666;
}

/* 卡片样式 */
.card {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  border-bottom: 1px solid #ebeef5;
  padding-bottom: 15px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h2 {
  font-size: 18px;
  color: #333;
  margin: 0;
}

/* 数据统计卡片 */
.stats-cards {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.stat-card {
  flex: 1;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  padding: 20px;
  text-align: center;
}

.stat-card h3 {
  font-size: 14px;
  color: #606266;
  margin-bottom: 10px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: bold;
  color: #409eff;
}

/* 表格样式 */
.table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

.table th,
.table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #ebeef5;
}

.table th {
  background-color: #f5f7fa;
  font-weight: 500;
  color: #606266;
}

.table tr:hover {
  background-color: #f5f7fa;
}

/* 表单样式 */
.form-container {
  max-width: 600px;
  margin: 0 auto;
}

.form-row {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.form-col {
  flex: 1;
}

/* 消息提示 */
.alert {
  padding: 12px 20px;
  border-radius: 4px;
  margin-bottom: 20px;
}

.alert-success {
  background-color: #f0f9eb;
  color: #67c23a;
  border: 1px solid #e1f3d8;
}

.alert-error {
  background-color: #fef0f0;
  color: #f56c6c;
  border: 1px solid #fbc4c4;
}

/* 图片预览 */
.img-preview {
  max-width: 200px;
  max-height: 200px;
  margin-bottom: 10px;
  border: 1px solid #dcdfe6;
  border-radius: 4px;
  padding: 5px;
}

/* 操作按钮组 */
.action-buttons {
  display: flex;
  gap: 10px;
}

/* 状态标签 */
.status-label {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 500;
}

.status-pending {
  background-color: #f0f9eb;
  color: #e6a23c;
}

.status-approved {
  background-color: #f0f9eb;
  color: #67c23a;
}

.status-rejected {
  background-color: #fef0f0;
  color: #f56c6c;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .admin-container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
  }
  
  .stats-cards {
    flex-direction: column;
  }
  
  .form-row {
    flex-direction: column;
  }
}