diff --git a/src/project/qianxinan/AppSignIn/AppSignIn.vue b/src/project/qianxinan/AppSignIn/AppSignIn.vue
index 1befe80b..019e6528 100644
--- a/src/project/qianxinan/AppSignIn/AppSignIn.vue
+++ b/src/project/qianxinan/AppSignIn/AppSignIn.vue
@@ -106,7 +106,7 @@ export default {
 <style lang="scss" scoped>
 .AppSignIn {
   background: url('./img/bg.png') no-repeat;
-  background-size: contain;
+  background-size: 100% auto;
   padding: 32px 32px;
   box-sizing: border-box;
   height: 100vh;