<el-radio-group v-model="form.radio">
        <el-radio-button label="0">指定</el-radio-button>
        <el-radio-button label="1">認(rèn)領(lǐng)</el-radio-button>
        <el-radio-button label="2">自薦</el-radio-button>
</el-radio-group>

::v-deep .el-radio-button__inner {
  width: 100px;
  height: 36px;
  border: 0 !important;
  font-size: 14px;
  font-weight: 400;
  color: #696969;
  line-height: 14px;
  outline: none;
  box-shadow: none;
}
// 修改激活后的樣式
::v-deep .el-radio-button__orig-radio:checked + .el-radio-button__inner {
  background: #f2f2f2;
  border: 0 !important;
  color: #696969;
  line-height: 14px;
  outline: none;
  box-shadow: none;
}

data () {
    return {
      taskForm: {
        taskTypeRadio: 0
        },
    }
}

<el-radio-group v-model="staffInfo.sex">
     <el-radio-button label="1">男</el-radio-button>
     <el-radio-button label="2">女</el-radio-button>
</el-radio-group>

::v-deep.el-radio-button{
  margin-right: 15px;
  border-radius:4px;
  .el-radio-button__inner {//修改按鈕樣式
    width: 120px;
    height: 42px;
    background: #F7F8FA;
    color:#333;
    border: 0 !important;
  }
  .el-radio-button__orig-radio:checked + .el-radio-button__inner {// 修改按鈕激活樣式
      color: #fff;
      background-color: #f63;
      border-color: #f63;
      box-shadow: -1px 0 0 0 #f63;
  }
}