diff --git a/app/web/app.js b/app/web/app.js
index 530ce7c..c3da81f 100644
--- a/app/web/app.js
+++ b/app/web/app.js
@@ -1724,13 +1724,12 @@ const FIELD_META = {
 };
 
 const FIELD_GROUPS = [
-  { label: "Provider & Sprache",        keys: ["default_stt_provider","default_llm_provider","default_tts_provider","default_language"] },
-  { label: "OpenRouter-Modelle & Stimmen", keys: ["openrouter_llm_model","openrouter_tts_model","openrouter_tts_voice"] },
-  { label: "Piper TTS",                 keys: ["piper_voice"] },
-  { label: "Lokales LLM",              keys: ["local_llm_system_prompt","local_llm_temperature","local_llm_top_p","local_llm_max_tokens"] },
-  { label: "TTS-Verarbeitung",         keys: ["tts_normalize_level","audio_stream_default"] },
-  { label: "Gedächtnis",               keys: ["memory_extraction_enabled","memory_extraction_every_n_turns"] },
-  { label: "Limits",                    keys: ["daily_request_limit"] },
+  { label: "Sprache & Stimme", keys: ["default_language","default_tts_provider","openrouter_tts_voice","piper_voice"] },
+  { label: "Antwortverhalten", keys: ["memory_extraction_enabled","audio_stream_default","daily_request_limit"] },
+  { label: "Erweitert", advanced: true, keys: [
+      "default_stt_provider","default_llm_provider","openrouter_llm_model","openrouter_tts_model",
+      "tts_normalize_level","local_llm_system_prompt","local_llm_temperature","local_llm_top_p",
+      "local_llm_max_tokens","memory_extraction_every_n_turns" ] },
 ];
 
 let _settingsData = [];
@@ -1748,15 +1747,31 @@ async function loadSettings() {
     if (!items.length) return;
     const section = document.createElement("div");
     section.className = "bg-white dark:bg-slate-800 rounded-xl border border-slate-200 dark:border-slate-700 overflow-hidden";
-    const header = document.createElement("div");
-    header.className = "px-4 py-2.5 border-b border-slate-100 dark:border-slate-700 bg-slate-50/80 dark:bg-slate-800/60";
-    header.innerHTML = `<h4 class="text-xs font-semibold text-slate-500 dark:text-slate-400 uppercase tracking-wide">${escHtml(group.label)}</h4>`;
-    section.appendChild(header);
+
+    const body = document.createElement("div");
     items.forEach((item, idx) => {
       const row = buildSettingRow(item);
       if (idx > 0) row.classList.add("border-t", "border-slate-100", "dark:border-slate-700/60");
-      section.appendChild(row);
+      body.appendChild(row);
     });
+
+    const header = document.createElement(group.advanced ? "button" : "div");
+    header.className = "w-full text-left px-4 py-2.5 border-b border-slate-100 dark:border-slate-700 bg-slate-50/80 dark:bg-slate-800/60 flex items-center gap-2";
+    if (group.advanced) {
+      body.classList.add("hidden");
+      header.innerHTML = `<span class="adv-arrow text-slate-400">▶</span>` +
+        `<h4 class="text-xs font-semibold text-slate-500 dark:text-slate-400 uppercase tracking-wide flex-1">${escHtml(group.label)}</h4>` +
+        `<span class="text-xs text-slate-400">technische Optionen</span>`;
+      header.addEventListener("click", () => {
+        const open = !body.classList.contains("hidden");
+        body.classList.toggle("hidden", open);
+        header.querySelector(".adv-arrow").textContent = open ? "▶" : "▼";
+      });
+    } else {
+      header.innerHTML = `<h4 class="text-xs font-semibold text-slate-500 dark:text-slate-400 uppercase tracking-wide">${escHtml(group.label)}</h4>`;
+    }
+    section.appendChild(header);
+    section.appendChild(body);
     container.appendChild(section);
   });
 }
diff --git a/app/web/index.html b/app/web/index.html
index 8b1ae76..b5bc8a6 100644
--- a/app/web/index.html
+++ b/app/web/index.html
@@ -365,6 +365,6 @@
     <div id="status" class="w-full max-w-3xl mx-auto mt-1 min-h-[1rem] text-xs text-slate-500 dark:text-slate-400"></div>
   </footer>
 
-  <script src="/app.js?v=46"></script>
+  <script src="/app.js?v=47"></script>
 </body>
 </html>