@media(max-width:767px){
 .overview-details .el-date-editor--daterange .el-range-separator{flex:0 0 20px;padding:0;width:20px}
 .overview-details .el-date-editor--daterange .el-range-input{flex:1 1 0;width:0;min-width:0;font-size:12px}
}