Change default Bg image on Archive page

1, Change default background image on Category page:

.nc-PageArchive > .w-full.px-2.xl\:max-w-screen-2xl.mx-auto > .rounded-3xl.relative.aspect-w-16.aspect-h-12 > .nc-NcImage {
    background-image: url('YourImageUrl');
    background-size: cover;
}

.nc-PageArchive > .w-full.px-2.xl\:max-w-screen-2xl.mx-auto > .rounded-3xl.relative.aspect-w-16.aspect-h-12 > .nc-NcImage img {
    display: none;
}

2, Change default background image on Author page:

.nc-PageArchiveAuthor > .w-screen.px-2.max-w-full.\32 xl\:max-w-screen-2xl.mx-auto > .rounded-3xl.relative.aspect-w-16.aspect-h-12 > .nc-NcImage {
    background-image: url('YourImageUrl');
    background-size: cover;
}

.nc-PageArchiveAuthor > .w-screen.px-2.max-w-full.\32 xl\:max-w-screen-2xl.mx-auto > .rounded-3xl.relative.aspect-w-16.aspect-h-12 > .nc-NcImage img {
    display: none;
}