chore: update demo

Author: Justineo

src/demo/Demo.vue

@@ -152,6 +152,7 @@ h2 {
 
   small {
     font-weight: 300;
+    opacity: 0.7;
   }
 
   button {
@@ -169,17 +170,20 @@ h2 {
   }
 }
 
-h2 small {
-  opacity: 0.7;
-}
-
 p small {
   font-size: 0.8em;
   color: #7f8c8d;
 }
 
 p {
   line-height: 1.5;
+
+  button + button,
+  button + select,
+  select + button,
+  select + select {
+    margin-left: 0.5em;
+  }
 }
 
 pre {
@@ -252,15 +256,6 @@ label {
   justify-content: center;
 }
 
-p {
-  button + button,
-  button + select,
-  select + button,
-  select + select {
-    margin-left: 0.5em;
-  }
-}
-
 button,
 input,
 label,