fix(style): fix summary font-size and padding style

assets/css/_page/_posts.scss

@@ -74,17 +74,14 @@
     h5,
     h6,
     p {
+      font-size: 1rem;
       margin: 0;
-      padding: .3rem 0;
+      padding: .2rem 0;
       overflow: hidden;
       overflow-wrap: break-word;
       text-overflow: ellipsis;
     }
 
-    p {
-      padding: 0;
-    }
-
     a {
       word-break: break-all;
     }