修复bug

lottery/registrationActivity.html

@@ -184,11 +184,10 @@
 
   .signup_page {
     width: 100vw;
-    height: 100%;
+    min-height: 100vh;
     background: url('./img/sign_up.png') no-repeat center;
-    background-size: 100vw 100%;
-    background-repeat: no-repeat;
-    overflow-y: auto;
+    /* background-size: 100vw 100%; */
+    background-size: cover;
   }
 
   .signupSucc_page {
@@ -223,7 +222,7 @@
   }
   .signup_box {
     margin: 30px 20px 0;
-    height: 469px;
+    height: auto;
     background: linear-gradient(#D5E6FF 50%, #FFFFFF 100%);
     border-radius: 20px;
     box-sizing: border-box;