diff --git a/04_Tablet-Quiz/app/index.html b/04_Tablet-Quiz/app/index.html
index 3253a08..9aa465c 100644
--- a/04_Tablet-Quiz/app/index.html
+++ b/04_Tablet-Quiz/app/index.html
@@ -1199,6 +1199,7 @@ function draw(){
   if(S.view!=="run"){ document.body.classList.remove("navOpen","akteOpen","rollenOpen"); }
   renderCardBadge();
   if(S.view==="deck")      return renderDeck();
+  if(S.view==="mainIntro") return renderMainIntro();
   if(S.view==="classify")  return renderClassify();
   if(S.view==="freigabe")  return renderFreigabe();
   if(S.view==="entry")     return renderEntry();
@@ -1234,13 +1235,41 @@ function renderDeck(){
     <div class="deck"><div class="deckRow mainRow">${cards}</div></div>`;
   $("#panel").querySelectorAll(".deckCard").forEach(el=>{
     el.onclick=()=>{ S.service=+el.dataset.s; S.change=0; S.mode="main";
-      S.classifyDone=false; S.classifyWrong=null;
-      S.freigabeDone=false; S.freigabeWrong=null;
-      S.entryDone=false; S.entryWrong=null; S.bonusDone={};
-      S.view="classify"; save(); draw(); };
+      S.classifyDone=true; S.classifyWrong=null;
+      S.freigabeDone=true; S.freigabeWrong=null;
+      S.entryDone=true; S.entryWrong=null; S.bonusDone={};
+      S.view="mainIntro"; save(); draw(); };
   });
 }
 
+/* ---------- Main-Intro: Major Change — Service wird neu eingeführt ------- */
+function renderMainIntro(){
+  const u = USE_CASES[S.service];
+  const card = acard(S.service, 0);
+  const rec = START_EMPFEHLUNG[0];
+  const recIndex = STATIONEN.findIndex(s=>s.id===rec.id);
+  const cardBig = `<img class="classifyCard" src="cards/s${S.service}-c0.png" alt="${card.titel}">`;
+  $("#panel").innerHTML = `
+    <div class="setupHead">Main · ${u.service}</div>
+    <div class="classifyTop">
+      ${cardBig}
+      <div class="classifyMain">
+        <div class="hint ok">Major Change</div>
+        <h2 class="setupTitle" style="margin-top:8px">${card.titel}</h2>
+        <div class="recBox"><h4>Worum geht's</h4>
+          <p style="margin:0 0 8px">${card.text}</p>
+          <p style="margin:0;color:var(--muted)">Als <b>Major Change</b> wird der Service <b>neu eingeführt</b> und durchläuft den <b>kompletten Lifecycle ab Design</b>. Die Freigaben fallen unterwegs an den <b>Gates</b> (SOR bzw. Service Owner) an — hier müsst ihr nichts einordnen. Das Einordnen (Change-Art · Freigabe · Einstieg) kommt danach bei den <b>Bonus-Varianten</b>.</p></div>
+      </div>
+    </div>
+    <div class="actions">
+      <button class="ghost" id="mainBackDeck">← Service-Deck</button>
+      <div class="spacer"></div>
+      <button class="primary" id="startRun">Los geht's → voller Durchlauf</button>
+    </div>`;
+  $("#mainBackDeck").onclick=()=>{ S.view="deck"; save(); draw(); };
+  $("#startRun").onclick=()=>{ seedAkte(recIndex); enterStation(recIndex); S.view="run"; save(); draw(); };
+}
+
 /* ---------- Schritt 2+3: Change-Art bestimmen (retry bis richtig) -------- */
 function renderClassify(){
   const correct = S.change;
@@ -1265,13 +1294,13 @@ function renderClassify(){
           <div class="choiceGrid grid2">${choices}</div>
         </div>
       </div>
-      <div class="actions"><button class="ghost" id="backDeck">← Andere Karte</button></div>`;
+      <div class="actions"><button class="ghost" id="backDeck">← Varianten</button></div>`;
     $("#panel").querySelectorAll(".choice").forEach(el=>{
       el.onclick=()=>{ const i=+el.dataset.i;
         if(i===correct){ S.classifyWrong=null; S.classifyDone=true; } else { S.classifyWrong=i; }
         save(); renderClassify(); };
     });
-    $("#backDeck").onclick=()=>{ S.view="deck"; save(); draw(); };
+    $("#backDeck").onclick=()=>{ S.view="bonusPick"; save(); draw(); };
   } else {
     $("#panel").innerHTML = `
       <div class="setupHead">Aufgabe 1 · Change-Art ✓</div>
@@ -1286,11 +1315,11 @@ function renderClassify(){
         </div>
       </div>
       <div class="actions">
-        <button class="ghost" id="backDeck">← Andere Karte</button>
+        <button class="ghost" id="backDeck">← Varianten</button>
         <div class="spacer"></div>
         <button class="primary" id="toFreigabe">Weiter → Freigabe bestimmen</button>
       </div>`;
-    $("#backDeck").onclick=()=>{ S.view="deck"; save(); draw(); };
+    $("#backDeck").onclick=()=>{ S.view="bonusPick"; save(); draw(); };
     $("#toFreigabe").onclick=()=>{ S.view="freigabe"; S.freigabeDone=false; S.freigabeWrong=null; save(); draw(); };
   }
 }
diff --git a/04_Tablet-Quiz/app/sw.js b/04_Tablet-Quiz/app/sw.js
index c818a76..3a0baba 100644
--- a/04_Tablet-Quiz/app/sw.js
+++ b/04_Tablet-Quiz/app/sw.js
@@ -1,5 +1,5 @@
 /* Service Worker — SLC-Workshop Companion (App-Shell, offline-first) */
-const CACHE = "slc-companion-v19";
+const CACHE = "slc-companion-v20";
 const SHELL = ["./", "index.html", "manifest.webmanifest", "icon.svg"];
 // Action-Card-Grafiken (cards/s<service>-c<change>.png) fuer Offline vorab cachen (alle 30).
 const CARDS = [];