diff --git a/.unipi/docs/fix/2026-06-03-mobile-menu-drawer-stacking-fix.md b/.unipi/docs/fix/2026-06-03-mobile-menu-drawer-stacking-fix.md
new file mode 100644
index 0000000..1d852ec
--- /dev/null
+++ b/.unipi/docs/fix/2026-06-03-mobile-menu-drawer-stacking-fix.md
@@ -0,0 +1,29 @@
+---
+title: "Mobile menu drawer invisible — Quick Fix"
+type: quick-fix
+date: 2026-06-03
+---
+
+# Mobile menu drawer invisible — Quick Fix
+
+## Bug
+After redesigning the mobile menu to the full-screen Figma drawer (`4164-5336` → `ARK V2 - 導航菜單`), tapping the hamburger toggled the icon to `X` but the drawer overlay never appeared on screen. Page content stayed fully visible and the bottom nav stayed on top.
+
+## Root Cause
+The drawer was rendered as a child of `<header className="sticky top-0 z-40 …">`. A `position: sticky` element with a `z-index` creates its own stacking context, which traps the drawer's `position: fixed; z-50` inside that context. Globally, the drawer ends up bound to the header's `z-40` layer, while the unrelated bottom navigation (`<nav className="fixed inset-x-0 bottom-0 z-40 …">`) lives in the root stacking context at `z-40`. With equal global `z`, source order wins — the bottom nav paints later and the drawer never reaches the foreground.
+
+## Fix
+Move the drawer JSX out of `<header>` and render it as a sibling at the layout root, so its `fixed`/`z-50` positioning lives in the root stacking context and stacks above both the header and the bottom nav.
+
+### Files Modified
+- `src/layouts/PublicLayout.tsx` — relocated the `{open ? (…) : null}` mobile drawer block from inside `<header>` to immediately after `</header>`. Logic unchanged; the `menuRef`, click-outside handler, body scroll lock, and inner nav/CTA structure all keep working because they reference the element by ref/state, not by DOM position.
+
+## Verification
+- `npx tsc --noEmit` — clean.
+- `npm run format` then `npm run format:check` — clean.
+- `npm test` — 49/49 passing.
+- Expected on device: tapping the hamburger now reveals the dark full-screen drawer with the 5 nav items, active item in gold, and the bottom `链接钱包` CTA (or the connected-wallet pill).
+
+## Notes
+- This is the same class of issue any future fullscreen overlay should avoid: do not nest `position: fixed` overlays inside a `position: sticky + z-index` ancestor. Either render them at the layout root or use a React Portal.
+- `position: sticky` *without* `z-index` does not create a stacking context, but adding any `z-index` to it does. The header here uses both because it needs to sit above the content while scrolled.
diff --git a/src/layouts/PublicLayout.tsx b/src/layouts/PublicLayout.tsx
index 6f413c2..e57a3eb 100644
--- a/src/layouts/PublicLayout.tsx
+++ b/src/layouts/PublicLayout.tsx
@@ -1,10 +1,4 @@
-import {
-  ChevronDown,
-  Heart,
-  Menu,
-  Search as SearchIcon,
-  X,
-} from "lucide-react";
+import { ChevronDown, Menu, Search as SearchIcon, X } from "lucide-react";
 import { AnimatePresence, m } from "framer-motion";
 import { useEffect, useRef, useState } from "react";
 import { Link, useLocation, useNavigate, useOutlet } from "react-router-dom";
@@ -82,10 +76,6 @@ function navClassName(active: boolean) {
   ].join(" ");
 }
 
-function mobileMenuNavClassName(active: boolean) {
-  return `${navClassName(active)} w-fit justify-self-start`;
-}
-
 const dropdownAnimationClass = "ark-header-popover-enter";
 const headerMenuAnimationClass = "ark-header-menu-enter";
 
@@ -493,6 +483,33 @@ export function PublicLayout() {
     };
   }, [mobileSearchOpen]);
 
+  // Lock background scroll while the full-screen mobile menu drawer is open.
+  useEffect(() => {
+    if (!open) return;
+    const scrollY = window.scrollY;
+    const body = document.body;
+    const prev = {
+      position: body.style.position,
+      top: body.style.top,
+      left: body.style.left,
+      right: body.style.right,
+      width: body.style.width,
+    };
+    body.style.position = "fixed";
+    body.style.top = `-${scrollY}px`;
+    body.style.left = "0";
+    body.style.right = "0";
+    body.style.width = "100%";
+    return () => {
+      body.style.position = prev.position;
+      body.style.top = prev.top;
+      body.style.left = prev.left;
+      body.style.right = prev.right;
+      body.style.width = prev.width;
+      window.scrollTo(0, scrollY);
+    };
+  }, [open]);
+
   return (
     <div className="flex min-h-[100dvh] flex-col bg-ark-bg">
       <DocumentMeta />
@@ -691,68 +708,64 @@ export function PublicLayout() {
             </div>
           </div>
         </div>
-
-        {open ? (
-          <div
-            ref={menuRef}
-            className={`${headerMenuAnimationClass} fixed inset-x-0 top-[64px] z-50 grid gap-2 bg-[#08070c] px-4 py-3 shadow-2xl shadow-black/50 min-[440px]:px-5 sm:px-6 md:top-[70px] md:px-9 min-[1000px]:hidden`}
-          >
-            <Link
-              to={lp("/browse")}
-              className={mobileMenuNavClassName(na("browseAll"))}
-              aria-current={na("browseAll") ? "page" : undefined}
-              onClick={() => setOpen(false)}
-            >
-              {t("all")}
-            </Link>
-            <Link
-              to={lp("/categories")}
-              className={mobileMenuNavClassName(na("categories"))}
-              aria-current={na("categories") ? "page" : undefined}
-              onClick={() => setOpen(false)}
-            >
-              {t("categories")}
-            </Link>
-            <Link
-              to={lp("/official-recommendations")}
-              className={mobileMenuNavClassName(na("browseRecommended"))}
-              aria-current={na("browseRecommended") ? "page" : undefined}
-              onClick={() => setOpen(false)}
-            >
-              {t("official")}
-            </Link>
-            <Link
-              to={lp("/browse?sort=latest")}
-              className={mobileMenuNavClassName(na("browseLatest"))}
-              aria-current={na("browseLatest") ? "page" : undefined}
-              onClick={() => setOpen(false)}
-            >
-              {t("latest")}
-            </Link>
-            <Link
-              to={popularHref}
-              className={mobileMenuNavClassName(na("browsePopular"))}
-              aria-current={na("browsePopular") ? "page" : undefined}
-              onClick={() => setOpen(false)}
-            >
-              {t("popular")}
-            </Link>
-            <Link
-              to={lp("/favorites")}
-              className={`${mobileMenuNavClassName(na("favorites"))} flex items-center gap-2`}
-              aria-current={na("favorites") ? "page" : undefined}
-              onClick={() => setOpen(false)}
-            >
-              <Heart size={16} strokeWidth={2} />
-              {t("favorites")}
-            </Link>
-            <div className="mt-2 w-full max-w-xs">
-              <WalletButton compact onOpenLogin={() => setOpen(false)} />
-            </div>
-          </div>
-        ) : null}
       </header>
 
+      {open ? (
+        <div
+          ref={menuRef}
+          className={`${headerMenuAnimationClass} fixed inset-x-0 bottom-0 top-[64px] z-50 flex flex-col bg-ark-bg md:top-[70px] min-[1000px]:hidden`}
+        >
+          <nav className="flex-1 overflow-y-auto px-5 pt-2">
+            {(
+              [
+                {
+                  to: lp("/browse"),
+                  label: t("all"),
+                  active: na("browseAll"),
+                },
+                {
+                  to: lp("/categories"),
+                  label: t("categories"),
+                  active: na("categories"),
+                },
+                {
+                  to: lp("/official-recommendations"),
+                  label: t("official"),
+                  active: na("browseRecommended"),
+                },
+                {
+                  to: lp("/browse?sort=latest"),
+                  label: t("latest"),
+                  active: na("browseLatest"),
+                },
+                {
+                  to: popularHref,
+                  label: t("popular"),
+                  active: na("browsePopular"),
+                },
+              ] as const
+            ).map((item) => (
+              <Link
+                key={item.to}
+                to={item.to}
+                aria-current={item.active ? "page" : undefined}
+                onClick={() => setOpen(false)}
+                className={`flex h-[68px] items-center border-b border-[#2B2B37] text-[15px] font-medium leading-[20px] outline-none transition-colors focus-visible:text-ark-gold ${
+                  item.active
+                    ? "text-ark-gold"
+                    : "text-[#A8A9AE] [@media(hover:hover)]:hover:text-ark-gold"
+                }`}
+              >
+                {item.label}
+              </Link>
+            ))}
+          </nav>
+          <div className="px-5 pb-[max(env(safe-area-inset-bottom),20px)] pt-4">
+            <WalletButton compact onOpenLogin={() => setOpen(false)} />
+          </div>
+        </div>
+      ) : null}
+
       {mobileSearchOpen ? (
         <SearchPanel
           lang={lang}