修改样式

src/styles/index.less

@@ -337,7 +337,11 @@ body {
   article, aside, canvas, details, embed, 
   figure, figcaption, footer, header, hgroup, 
   menu, nav, output, ruby, section, summary,
-  time, mark, audio, video, hr {
+  time, mark, audio, video {
     all: revert;
   }
+
+  hr {
+    border-top: 1px solid #D2D2D2;
+  }
 }