fix(mini-user): H5 pay use USER_H5; center login phone input

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/mini-user/src/styles/login.css

@@ -102,11 +102,13 @@
   border-bottom: 1px solid var(--color-surface-variant, #e8e4de);
   padding-bottom: 8px;
   margin-bottom: 16px;
+  min-height: 40px;
 }
 
 .login-field-prefix {
   font-size: 16px;
   font-weight: 500;
+  line-height: 32px;
   color: var(--color-on-surface);
   margin-right: 12px;
   flex-shrink: 0;
@@ -119,9 +121,28 @@
   padding: 0;
   height: 32px;
   font-size: 16px;
-  line-height: 24px;
+  line-height: 32px;
   color: var(--color-on-surface);
   min-width: 0;
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+}
+
+.login-field-input input,
+.login-field-input .taro-input,
+.login-field-input .weui-input {
+  width: 100% !important;
+  height: 100% !important;
+  min-height: 0 !important;
+  padding: 0 !important;
+  margin: 0 !important;
+  border: none !important;
+  background: transparent !important;
+  box-sizing: border-box !important;
+  font-size: 16px !important;
+  line-height: normal !important;
+  color: inherit;
 }
 
 .login-get-code {