schoolwisdoms-student-mp/pages/targetList/targetList.wxss

.submit-btn{
  width: 400rpx;
  font-size: 32rpx;
  height: 80rpx;
  line-height: 80rpx;
  color: #FFF;
  text-align: center;
  position: fixed;
  bottom: 40rpx;
  left: 50%;
  background: #005033;
  margin-left: -200rpx;
  border-radius: 50rpx;
}