el-radio单选框样式修改，小圆圈改为方框

 /deep/ .el-radio__inner {
  border-radius: 2px !important;
}

 /deep/ .el-radio__input.is-checked .el-radio__inner::after {
  content: '';
  width: 8px;
  height: 3px;
  border: 1px solid white;
  border-top: transparent;
  border-right: transparent;
  text-align: center;
  display: block;
  position: absolute;
  top: 3px;
  left: 2px;
  transform: rotate(-45deg);
  border-radius: 0px;
  background: none;
}