diff --git a/posimai-sc/index.html b/posimai-sc/index.html
index e2c59a89..54c6769e 100644
--- a/posimai-sc/index.html
+++ b/posimai-sc/index.html
@@ -217,9 +217,9 @@ header{display:flex;align-items:center;justify-content:space-between;padding:0 1
 .q-card.correct{border-color:rgba(74,222,128,.35);background:rgba(74,222,128,.04)}
 .q-card.wrong{border-color:rgba(248,113,113,.30);background:rgba(248,113,113,.03)}
 .q-num{font-size:10px;font-weight:600;color:var(--text3);letter-spacing:.08em;text-transform:uppercase;margin-bottom:7px;display:flex;align-items:center;gap:5px}
-.q-text{font-size:13px;color:var(--text);line-height:1.7;margin-bottom:12px}
+.q-text{font-size:13px;color:var(--text);line-height:1.7;margin-bottom:12px;word-break:break-word;overflow-wrap:anywhere;line-break:auto}
 .q-choices{display:flex;flex-direction:column;gap:6px}
-.q-choice{display:flex;align-items:flex-start;gap:9px;padding:8px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);cursor:pointer;font-size:12px;color:var(--text2);transition:all .15s;text-align:left;font-family:'Geist',sans-serif;line-height:1.5;width:100%}
+.q-choice{display:flex;align-items:flex-start;gap:9px;padding:8px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);cursor:pointer;font-size:12px;color:var(--text2);transition:all .15s;text-align:left;font-family:'Geist',sans-serif;line-height:1.5;width:100%;word-break:break-word;overflow-wrap:anywhere;line-break:auto}
 .q-choice:hover:not(:disabled){border-color:var(--accent-border);color:var(--text);background:var(--accent-dim)}
 .q-choice:disabled{cursor:default}
 .q-choice.sel-ok{border-color:rgba(74,222,128,.45);background:rgba(74,222,128,.09);color:var(--ok)}
@@ -253,8 +253,8 @@ header{display:flex;align-items:center;justify-content:space-between;padding:0 1
   .unit-nav{padding-bottom:20px}
   .home-cats{grid-template-columns:1fr}
   .q-card{padding:12px;margin-bottom:8px}
-  .q-text{font-size:12.5px;word-break:keep-all;line-break:strict}
-  .q-choice{padding:8px 10px;font-size:11.5px;line-height:1.55;word-break:keep-all;line-break:strict}
+  .q-text{font-size:12.5px;word-break:break-word;overflow-wrap:anywhere;line-break:auto}
+  .q-choice{padding:8px 10px;font-size:11.5px;line-height:1.55;word-break:break-word;overflow-wrap:anywhere;line-break:auto}
   .q-exp{font-size:11.5px}
 }
 ::-webkit-scrollbar{width:4px}
diff --git a/posimai-sc/js/app.js b/posimai-sc/js/app.js
index da2d0726..06478fd0 100644
--- a/posimai-sc/js/app.js
+++ b/posimai-sc/js/app.js
@@ -831,7 +831,10 @@ document.addEventListener('alpine:init', () => {
       this.$nextTick(()=>{
         if(window.lucide) lucide.createIcons();
         requestAnimationFrame(()=>{
-          requestAnimationFrame(()=>{ this.scrollMainToComprehension(); });
+          requestAnimationFrame(()=>{
+            this.scrollMainToComprehension('auto');
+            setTimeout(()=>{ this.scrollMainToComprehension('auto'); }, 140);
+          });
         });
       });
     },
@@ -841,20 +844,25 @@ document.addEventListener('alpine:init', () => {
       }
       this.$nextTick(()=>{
         requestAnimationFrame(()=>{
-          requestAnimationFrame(()=>{ this.scrollMainToComprehension(); });
+          requestAnimationFrame(()=>{
+            this.scrollMainToComprehension('auto');
+            setTimeout(()=>{ this.scrollMainToComprehension('auto'); }, 140);
+          });
         });
         if(window.lucide) lucide.createIcons();
       });
     },
-    scrollMainToComprehension(){
+    scrollMainToComprehension(behavior='auto'){
       const m=document.getElementById('main');
       const el=document.getElementById('comprehension-quiz');
       if(!m||!el) return;
       try{ el.focus({ preventScroll:true }); }catch(e){}
-      // main内の実座標で算出して、カード先頭へ安定して合わせる
+      const firstQ=el.querySelector('.q-card');
+      const target=firstQ||el;
+      // main内の実座標で算出して、カード先頭（Q1）へ安定して合わせる
       const offset=8;
-      const top=(el.getBoundingClientRect().top - m.getBoundingClientRect().top) + m.scrollTop - offset;
-      m.scrollTo({ top:Math.max(0,top), behavior:'smooth' });
+      const top=(target.getBoundingClientRect().top - m.getBoundingClientRect().top) + m.scrollTop - offset;
+      m.scrollTo({ top:Math.max(0,top), behavior });
     },
     stepGoBack(){
       if(!this.stepMode) return;
diff --git a/posimai-sc/sw.js b/posimai-sc/sw.js
index 6b56992c..18154280 100644
--- a/posimai-sc/sw.js
+++ b/posimai-sc/sw.js
@@ -1,5 +1,5 @@
 // posimai-sc SW — same-origin の静的資産のみキャッシュ（CDN は対象外）
-const CACHE = 'posimai-sc-v5';
+const CACHE = 'posimai-sc-v6';
 const STATIC = [
   '/',
   '/index.html',