Align funds to OKX funding/trading only; fold rules; match settings width.

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

frontend/src/styles/app.css

@@ -1118,18 +1118,19 @@ input {
   border-color: rgba(240, 185, 11, 0.55);
 }
 
-/* Settings: ultrawide + tablet */
+/* Settings: 与顶栏资金卡同宽（由 .app-container 约束） */
 .settings-page {
   width: 100%;
-  max-width: 1200px;
+  max-width: none;
 }
 
 .settings-card {
   width: 100%;
+  max-width: none;
 }
 
 .settings-card-narrow {
-  max-width: 640px;
+  max-width: none;
 }
 
 .settings-lead {
@@ -1280,15 +1281,39 @@ input {
 }
 
 @media (min-width: 1100px) {
-  .settings-page {
-    max-width: 1320px;
-  }
-
   .settings-fields {
     grid-template-columns: repeat(3, minmax(0, 1fr));
   }
 }
 
+.settings-xfer-row {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
+  gap: 12px 14px;
+  align-items: end;
+}
+
+.settings-xfer-row .field {
+  margin-bottom: 0;
+  min-width: 0;
+}
+
+.settings-xfer-action {
+  display: flex;
+  align-items: flex-end;
+  padding-bottom: 1px;
+}
+
+@media (max-width: 900px) {
+  .settings-xfer-row {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
+  .settings-xfer-action {
+    grid-column: 1 / -1;
+  }
+}
+
 @media (max-width: 699px) {
   .settings-fields .field {
     margin-bottom: 14px;