feat(article): add style to <kbd> tag (#862)

* fix: set `unsafe` to true for exampleSite

To display `<kbd>` tag correctly

* feat(article): add style to `kbd` tag

* feat: improve `<kbd>` style

assets/scss/partials/layout/article.scss

@@ -423,4 +423,14 @@
         overflow-x: auto;
         overflow-y: hidden;
     }
+
+    kbd {
+        border: 1px solid var(--kbd-border-color);
+        font-weight: bold;
+        font-size: 0.9em;
+        line-height: 1;
+        padding: 2px 4px;
+        border-radius: 4px;
+        display: inline-block;
+    }
 }

assets/scss/variables.scss

@@ -123,6 +123,8 @@ $defaultTagColors: #fff, #fff, #fff, #fff, #fff;
     --table-border-color: #dadada;
     --tr-even-background-color: #efefee;
 
+    --kbd-border-color: #dadada;
+
     &[data-scheme="dark"] {
         --code-background-color: #272822;
         --code-text-color: rgba(255, 255, 255, 0.9);