vue-vben-admin/docs/.vitepress/theme/styles/base.css

html.dark {
  color-scheme: dark;
}

.dark .VPContent {
  /* background-color: #14161a; */
}

.form-valid-error p {
  margin: 0;
}

/* 顶部导航栏选中项样式 */
.VPNavBarMenuLink,
.VPNavBarMenuGroup {
  border-bottom: 1px solid transparent;
}

.VPNavBarMenuLink.active,
.VPNavBarMenuGroup.active {
  border-bottom-color: var(--vp-c-brand-1);
}