diff --git a/layouts/_partials/custom/head-end.html b/layouts/_partials/custom/head-end.html
index 5c386c9..749e37f 100644
--- a/layouts/_partials/custom/head-end.html
+++ b/layouts/_partials/custom/head-end.html
@@ -1,4 +1,19 @@
 <!-- Custom fonts -->
-<link rel="preconnect" href="https://fonts.googleapis.com">
-<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-<link href="https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap" rel="stylesheet">
+<link rel="preconnect" href="https://fonts.googleapis.com" />
+<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+<link
+    href="https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap"
+    rel="stylesheet"
+/>
+
+<!-- Expand sidebar tree by default -->
+<script>
+    document.addEventListener("DOMContentLoaded", function () {
+        document
+            .querySelectorAll(".hextra-sidebar-collapsible-button")
+            .forEach(function (btn) {
+                var li = btn.closest("li");
+                if (li) li.classList.add("open");
+            });
+    });
+</script>