重置element-ui 表格样式

有时候需要用element-ui的表格，但又要改变样式，所以就需要重置el-table样式。
我项目是用less写的，这个是css重置的样式

  .alarm-config /deep/ .el-table{
        background-color: #111C29;
        td,th{            
            border: 1px solid rgba(96, 101, 105, 0.5);
        }
         thead {
            tr, td,th  {
            padding: 0;
            height: 60px;
            background-color: #1C2733;
            .cell {
                background: #1C2733;
                min-height: 30px;
                padding: 0;
                display: flex;
                align-items: center;
                justify-content: center;
                width: auto;
                white-space: nowrap;
                border-right: unset;
                 }
            }
        }
        tbody {     
            .cell {
            padding: 0;
            height: auto;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 50px;
            }

            td, tr {
            height: unset;
            padding: 0;
            background:#111C29;
            }
        }
        }

模板样式，用的是vue框架

 <el-table
             ref="multipleTable"
             :data="alarmData"
             tooltip-effect="dark"
             style="width: 100%"
             @selection-change="handleSelectionChange">

             <el-table-column
             label="监测报警名称"
             prop="alarmName"
             >
             </el-table-column>

             <el-table-column
             width="500">
              <template slot="header" slot-scope="scope">
                 <el-checkbox v-model="voiceAlarmCheck" @change="allAlarmCheck('voice')">语音提示</el-checkbox>
             </template>
             
             <template slot-scope="scope">
                 <el-checkbox v-model="scope.row.checked" ></el-checkbox>
                 <span class="lab">提示次数：</span><el-input-number v-model="scope.row.date" controls-position="right"></el-input-number>
                 <span class="lab">每次间隔（s）：</span><el-input-number v-model="scope.row.voice" controls-position="right"></el-input-number>                       
             </template>                
             </el-table-column>

             <el-table-column
             >
              <template slot="header" slot-scope="scope">
                 <el-checkbox v-model="dialogAlarmCheck" @change="allAlarmCheck('dialog')">弹窗提示</el-checkbox>
             </template>
             <template slot-scope="scope">
                 <el-checkbox v-model="scope.row.checked1" >弹窗提示</el-checkbox>
             </template>
             </el-table-column>
       </el-table>