feat：更新

postcss.config.js

@@ -12,7 +12,7 @@ module.exports = {
     "postcss-design-convert": {
       multiple: 2,
       units: ["vw"],
-      selector: /^\.yzy-/
+      selector: /^\.van-/
     },
     "postcss-write-svg": {
       utf8: false