fix: component style should not depend on reset.css

packages/vant-css/src/base.css

@@ -6,4 +6,3 @@
 @import "./common/normalize.css";
 @import "./common/hairline.css";
 @import "./common/animation.css";
-

packages/vant-css/src/common/normalize.css

@@ -6,6 +6,10 @@ html {
   -webkit-tap-highlight-color: transparent;
 }
 
+body {
+  margin: 0;
+}
+
 a {
   text-decoration: none;
 }

packages/vant-css/src/goods-action.css

@@ -17,6 +17,7 @@
     height: 50px;
     font-size: 10px;
     min-width: 15%;
+    line-height: 1;    
     text-align: center;
     background-color: $white;
     flex-direction: column;