refactor: 样式优化

Former-commit-id: e9e3e1779f71fc354323c0a2037cf701da893fbf

src/styles/reset.scss

@@ -51,7 +51,10 @@ svg {
 }
 
 
-
+ul,li{
+  margin: 0;
+  padding: 0;
+}
 
 
 *,
@@ -61,7 +64,9 @@ svg {
 }
 
 a:focus,
-a:active {
+a:active ,
+div:focus
+{
   outline: none;
 }
 
@@ -73,18 +78,3 @@ a:hover {
   text-decoration: none;
 }
 
-div:focus {
-  outline: none;
-}
-
-.clearfix {
-  &::after {
-    visibility: hidden;
-    display: block;
-    font-size: 0;
-    content: " ";
-    clear: both;
-    height: 0;
-  }
-}
-