Element-UI el-table 树形结构子节点无法打勾如何解决？

::v-deep .indeterminate .el-table-column--selection .cell .el-checkbox {
    display: block !important;
}

::v-deep .indeterminate .el-checkbox__input .el-checkbox__inner {
    background-color: #4a97eb !important;
    border-color: #4a97eb !important;
    color: #fff !important;
}

::v-deep .indeterminate .el-checkbox__input.is-checked .el-checkbox__inner::after {
    transform: scale(0.5);
}

::v-deep .indeterminate .el-checkbox__input .el-checkbox__inner::after {
    border-color: #c0c4cc !important;
    background-color: #c0c4cc;
}

::v-deep .indeterminate .el-checkbox__input .el-checkbox__inner::after {
    content: "";
    position: absolute;
    display: block;
    background-color: #fff;
    height: 2px;
    transform: scale(0.5);
    left: 0;
    right: 0;
    top: 5px;
    width: auto !important;
}

::v-deep .indeterminate {
    background-color: #f5f5f5;
}