Add description

src/style.less

@@ -1,4 +1,5 @@
-// This part add to "Design system" component
+// Lower code add to "Design system" component
+// ---
 @keyframes idm-skeleton-loading {
   to {
     background-position-x: -200%;
@@ -18,14 +19,14 @@
     animation: 1.5s idm-skeleton-loading linear infinite;
     width: @width;
     height: @height;
-
-    // Mobile adaptation
+    
     @media (max-width: 756px) {
       width: @mobileWidth;
       height: @mobileHeight;
     }
   }
 }
+// ---
 
 // Example of use
 .wrapper {