hugo-theme-next/layouts/partials/head/style.html

<!-- Plugin style files -->
{{- $cssRes := .Site.Data.resources.css }}
{{- $vendor := .Site.Params.vendors.plugins }}
{{- $router := .Scratch.Get "router" }}

{{- range $css := $cssRes }}
  {{ $pluginCss := partial "_funs/get_res.html" (dict "res" . "vendor" $vendor "router" $router) }}
  <link type="text/css" rel="stylesheet" href="{{ $pluginCss }}" /> 
{{- end }}

<!-- Main Style file -->
{{- $scss := resources.Get "css/main.scss" }}
{{- $scss = $scss | resources.ExecuteAsTemplate "main.scss" .  }}
{{- $css := $scss | toCSS (dict "targetPath" "/css/main.css" "outputStyle" "expanded") }}
{{- if hugo.IsProduction }}
{{- $css = $css | minify | fingerprint }}
{{- end }}
<link rel="stylesheet" href="{{ $css.RelPermalink }}">
{{- if .IsPage }}
  <style type="text/css">
    .post-footer, .flinks-list-footer hr:after {
      content: "{{ .Site.Params.postFooter.endLineTip }}";
    }
  </style>
{{- end }}

{{- $custom := .Scratch.Get "style" }}
{{- if $custom }}
<link rel="stylesheet" type="text/css" href="{{ $custom }}">
{{- end }}