记录el-radio单选框样式修改，小圆圈改为方框，css预处理用的less

样式图：

``

<el-radio-group v-model="radio">
                <el-radio :label="1">全部</el-radio>
                <el-radio :label="2">机关养老</el-radio>
                <el-radio :label="3">企业养老</el-radio>
                <el-radio :label="4">基本医疗</el-radio>
                <el-radio :label="5">失业</el-radio>
                <el-radio :label="6">工伤</el-radio>
                <el-radio :label="7">生育</el-radio>
</el-radio-group>

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

/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;
  }

``