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;
}
