Improve description for twitter cards and posts

assets/scss/_single.scss

@@ -52,6 +52,11 @@
     }
   }
 
+  &-excerpt {
+    color: grey;
+    font-style: italic;
+  }
+
   &-info {
     margin-top: 30px;
     font-size: 0.8rem;

layouts/partials/head.html

@@ -2,7 +2,7 @@
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 <meta name="author" content="{{ if .Params.author }}{{ .Params.author }}{{ else }}{{ range .Site.Author }}{{ . }} {{ end }}{{ end }}">
-<meta name="description" content="{{ if .IsHome }}{{ .Site.Params.homeSubtitle }}{{ else }}{{ .Summary | plainify }}{{ end }}" />
+<meta name="description" content="{{ if .IsHome }}{{ .Site.Params.homeSubtitle }}{{ else }}{{ if .Params.Description }}{{ .Params.Description }}{{ else }}{{ .Summary | plainify }}{{ end }}{{ end }}" />
 <meta name="keywords" content="{{ .Site.Params.keywords }}{{ if .Params.tags }}{{ range .Params.tags }}, {{ . }}{{ end }}{{ end }}" />
 <meta name="robots" content="noodp" />
 <meta name="theme-color" content="{{ .Site.Params.themeColor }}" />
@@ -37,6 +37,7 @@
 
 {{ template "_internal/schema.html" . }}
 {{ template "_internal/twitter_cards.html" . }}
+{{ template "_internal/google_news.html" . }}
 
 {{ if isset .Site.Taxonomies "series" }}
     {{ template "_internal/opengraph.html" . }}

layouts/posts/single.html

@@ -22,6 +22,14 @@
         <a href="{{ .Permalink }}">{{ .Title | markdownify }}</a>
       </h1>
 
+      {{ with .Params.Description }}
+        <div class="post-excerpt">{{ . }}</div>
+      {{ end }}
+
+      {{ with .Params.Cover }}
+        <img src="/{{ . }}" class="post-cover" />
+      {{ end }}
+
       {{- if .Params.toc }}
         <hr />
         <aside id="toc">
@@ -31,10 +39,6 @@
         <hr />
       {{- end }}
 
-      {{ with .Params.Cover }}
-        <img src="/{{ . }}" class="post-cover" />
-      {{ end }}
-
       <div class="post-content">
         {{ .Content }}
       </div>