body {
  margin: 0;
  padding: 0;
  background-color: #f5f7fa;
  font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
}
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 2px 12px rgba(0,0,0,.15);
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
}
.header h1 {
  margin: 0;
  font-size: 24px;
  font-weight: 600;
}
.main-content {
  margin-top: 80px;
  padding: 20px;
}
.card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px 0 rgba(0,0,0,.08);
  padding: 20px;
  margin-bottom: 20px;
}
.card h3 {
  margin-top: 0;
  color: #303133;
  border-bottom: 2px solid #409eff;
  padding-bottom: 10px;
}
.subtitle {
  color: #909399;
  font-size: 14px;
  margin-top: 5px;
}
.stats-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}
.stats-number {
  font-size: 32px;
  font-weight: bold;
  margin: 10px 0;
}
.drag-item {
  display: inline-block;
  padding: 8px 16px;
  margin: 5px;
  border: 1px solid #dcdfe6;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
  background: #fff;
  transition: all 0.3s;
}
.drag-item:hover {
  background-color: #ecf5ff;
  border-color: #409eff;
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
}
.qr-canvas {
  display: block;
  margin: 0 auto;
}
@media (max-width: 768px) {
  .header h1 {
    font-size: 18px;
  }
  .main-content {
    padding: 10px;
  }
  .stats-card {
    padding: 15px;
    margin-bottom: 10px;
  }
  .stats-number {
    font-size: 24px;
  }
  .card {
    padding: 15px;
  }
  /* 移动端优化表格 */
  .el-table {
    font-size: 12px;
  }
  /* 移动端优化表单 */
  .el-form-item__label {
    font-size: 14px;
  }
}