【vue】iview如何把input输入框和点击输入框之后的边框去掉

 <i-input class="txtput" :maxlength="20" v-model="meetingDate.meetingTitle" placeholder="请输入..." ></i-input>

/* 穿透进iview的input框 */
.txtput >>> .ivu-input{
    width: 85%;
    border: none;
    outline:none;
    font-size: 20px;
    margin-left: 0%;
    border-bottom: 1.3px solid gainsboro;
  }

/* 去除点击之后的input框 */
.txtput >>> .ivu-input:focus{
    outline:none;
    border:none;
    box-shadow: 0 0 0 2px transparent; 
    border-bottom: 1.3px solid gainsboro;
}