.bill_header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  background-color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  border-top: 1rpx solid #eee;
  z-index: 100;
  padding: 30rpx;
  color: #333333;
  font-size: 28rpx;
}