Add CSS partial for combined styles and custom font settings

layouts/partials/head/css.html

@@ -0,0 +1,28 @@
+{{
+  $CSS := slice
+    (resources.Get "css/reset.css")
+    (resources.Get "css/vars.css")
+    (resources.Get "css/utils.css")
+    (resources.Get "css/fonts.css")
+    (resources.Get "css/lxgw/lxgwwenkaigbscreen.css")
+    (resources.Get "css/lxgw/lxgwwenkaigbscreenr.css")
+    (resources.Get "css/lxgw/lxgwwenkaiscreen.css")
+    (resources.Get "css/lxgw/lxgwwenkaiscreenr.css")
+    (resources.Get "css/main.css")
+    (resources.Get "css/custom.css")
+    (resources.Get "css/colors/default.css")
+}}
+
+{{ with .Site.Params.colorPalette }}
+  {{ $path := printf "css/colors/%s.css" . }}
+  {{ $CSS = $CSS | append (resources.Get $path) }}
+{{ end }}
+
+{{
+  $combined := $CSS
+    | resources.Concat "assets/combined.css"
+    | minify
+    | fingerprint
+}}
+
+<link rel="stylesheet" href="{{ $combined.RelPermalink }}" media="all">