fix

src/assets/css/style.css

@@ -10,6 +10,9 @@ p {
   margin: 0;
   padding: 0;
 }
+* {
+  box-sizing: border-box;
+}
 html,
 body,
 #app {
@@ -25,28 +28,3 @@ body,
     transform: rotate(360deg);
   }
 }
-.flex {
-  display: flex;
-}
-.flex-col {
-  flex-direction: column;
-}
-.flex-1 {
-  flex: 1;
-}
-.flex-center {
-  align-items: center;
-  justify-content: center;
-}
-.flex-between {
-  justify-content: space-between;
-}
-.align-center {
-  align-items: center;
-}
-.relative {
-  position: relative;
-}
-.absolute {
-  position: absolute;
-}

src/assets/css/style.less

@@ -11,6 +11,10 @@ p {
   padding: 0;
 }
 
+*{
+	box-sizing: border-box;
+}
+
 html,
 body,
 #app {