如何在ng-select中更改ng-dropdown-panel样式？

Question

我想更改ng-dropdown-panel样式，但是它只是样式容器。

components.css

.ng-select.dropdown ::ng-deep .ng-select-container  {            
    min-height: 0px;
    border-radius: 10;
    background-color: #343A40;
    color: white;    
}
.ng-select.dropdown ::ng-deep .ng-dropdown-panel  {            
    background-color: #343A40;
    color: white;    
}

component.html

<ng-select class="dropdown" [items]="data" bindLabel="data" bindValue="dbValue"></ng-select>

https://stackblitz.com/edit/angular-stq6ew