Fix style regressions on landing page (mastodon#10030)

Author: Gargron

app/javascript/styles/mastodon/about.scss

@@ -49,15 +49,9 @@ $small-breakpoint: 960px;
     }
   }
 
+  strong,
   em {
-    display: inline;
-    margin: 0;
-    padding: 0;
     font-weight: 700;
-    background: transparent;
-    font-family: inherit;
-    font-size: inherit;
-    line-height: inherit;
     color: lighten($darker-text-color, 10%);
   }
 
@@ -796,7 +790,7 @@ $small-breakpoint: 960px;
       width: 100%;
       display: flex;
       flex-direction: row-reverse;
-      flex-wrap: wrap;
+      flex-wrap: nowrap;
       justify-content: space-between;
       align-items: center;
     }
@@ -846,14 +840,7 @@ $small-breakpoint: 960px;
     }
 
     strong {
-      display: inline;
-      margin: 0;
-      padding: 0;
-      font-weight: 700;
-      background: transparent;
-      font-family: inherit;
-      font-size: inherit;
-      line-height: inherit;
+      font-weight: 500;
       color: lighten($darker-text-color, 10%);
     }