diff --git a/index.html b/index.html
index 22722ea..abd2571 100644
--- a/index.html
+++ b/index.html
@@ -956,13 +956,14 @@ function examCli(j){
   if(kor)examScore++;examIdx++;setTimeout(showExamQ,400);
 }
 function examCfil(){
-  let q=Q.find(x=>x.id===examQid[examIdx]);if(!q)return;
-  let v=$('eip')?$('eip').value.trim():'';if(!v)return;
-  let kor=v===q.ans;
-  let inp=$('eip');inp.disabled=true;inp.className='inp '+(kor?'ok':'no');
+  let q=Q.find(function(x){return x.id===examQid[examIdx];});if(!q)return;
+  let v=$(('eip'))?$(('eip')).value.trim():'';if(!v)return;
+  function n(s){return s.replace(/[\s,，、;；。．.]+/g,",").replace(/^,+|,+$/g,"").replace(/,+/g,",").replace(/\s+/g,"").toLowerCase();}
+  var kor=n(v)===n(q.ans);
+  if(!kor){var nv=parseFloat(v);var na=parseFloat(q.ans);if(!isNaN(nv)&&!isNaN(na)&&Math.abs(nv-na)<0.001)kor=true;}
+  var inp=$(('eip'));inp.disabled=true;inp.className='inp '+(kor?'ok':'no');
   if(kor)examScore++;examIdx++;setTimeout(showExamQ,600);
-}
-function finishExam(){
+}function finishExam(){
   if(examTimer){clearInterval(examTimer);examTimer=null;}
   $('eh').className='exam-hdr';
   let pct=examQid.length?Math.round(examScore/examQid.length*100):0;
@@ -1103,42 +1104,68 @@ function showFullExp(id){
   cd.appendChild(fb);upd();
 }
 function cfil(id){
-  let q=Q.find(x=>x.id===id);if(!q)return;
+  let q=Q.find(function(x){return x.id===id;});if(!q)return;
   let v=$('ip'+id)?$('ip'+id).value.trim():'';if(!v)return;
-  let kor=(v===q.ans);
+  // Normalize both input and answer for flexible comparison
+  function normalize(s){
+    return s.replace(/[\s，,、；;。．.]+/g,",").replace(/^,+|,+$/g,"").replace(/,+/g,",").replace(/\s+/g,"").toLowerCase();
+  }
+  let userNorm=normalize(v);
+  let ansNorm=normalize(q.ans);
+  // Support partial match for comma-separated answers
+  let kor=(userNorm===ansNorm);
+  if(!kor&&ansNorm.indexOf(",")>0){
+    let userParts=userNorm.split(",").filter(function(p){return p.length>0;});
+    let ansParts=ansNorm.split(",").filter(function(p){return p.length>0;});
+    if(userParts.length===ansParts.length){
+      var allMatch=true;
+      for(var pi=0;pi<ansParts.length;pi++){
+        if(userParts[pi]!==ansParts[pi]){allMatch=false;break;}
+      }
+      kor=allMatch;
+    }
+  }
+  // Also support mathematical equivalence for fraction/decimal
+  if(!kor){
+    var numV=parseFloat(v);
+    var numAns=parseFloat(q.ans);
+    if(!isNaN(numV)&&!isNaN(numAns)&&Math.abs(numV-numAns)<0.001)kor=true;
+  }
   conv[id]=kor?q.ans:'__w__';recAns(id,kor);if(kor)AUDIO.correct();else AUDIO.wrong();
   let inp=$('ip'+id);inp.disabled=true;inp.className='inp '+(kor?'ok':'no');
   let br=inp.parentElement.querySelector('.br');if(br)br.remove();
-  if(!kor){
-    let m=meta[id];
-    if(m&&m.h===0){
-      m.h=1;let cd=inp.closest('.cd');
-      let ht=document.createElement('div');ht.className='ht sh';
-      ht.innerHTML='💡 提示: '+getHintText(q)+'<br><span class="rt" onclick="retryFill(\''+id+'\')">🔄 再试一次</span><span style="margin-left:8px" class="rt" onclick="showFullExp(\''+id+'\')">👀 看解析</span>';
-      cd.appendChild(ht);return;
-    }
-  }
+  // Always show explanation immediately (remove hint-first flow)
+  let cd=inp.closest('.cd');
+  let existingFB=cd?cd.querySelector('.fb'):null;
+  if(existingFB)existingFB.remove();
   let fb=document.createElement('div');
   fb.className='fb sh '+(kor?'go':'bd');
-  fb.innerHTML=(kor?'✅ PERFECT! 完美通过！':'❌ MISS! 再练练！')+'<br><strong>🔧 维修站解析：</strong>'+q.exp;
-  if(!kor)fb.innerHTML+='<br><strong>正确赛道路线：</strong>'+q.ans;
-  inp.parentElement.appendChild(fb);
-  if(!kor){
-    let sims=getSimQuestions(q,3);
+  if(kor){
+    fb.innerHTML='✅ PERFECT! 完美通过！<br><strong>🔧 维修站解析：</strong>'+q.exp;
+  }else{
+    fb.innerHTML='❌ MISS! 再练练！<br><strong>🔧 维修站解析：</strong>'+q.exp+'<br><strong>✅ 正确答案：</strong>'+q.ans;
+    if(v!==q.ans)fb.innerHTML+='<br><small style="color:#888;">你的答案: '+v+'</small>';
+    // Show similar questions for practice
+    let sims=getSimQuestions(q,2);
     if(sims.length){
-      let cd=inp.closest('.cd');let sdiv=document.createElement('div');sdiv.className='sim sh';
+      let sdiv=document.createElement('div');sdiv.className='sim sh';
       let shtml='<span class="tp2">🏎 关联练习（同题型巩固）</span>';
-      sims.forEach((sq,si)=>{
+      sims.forEach(function(sq,si){
         shtml+='<div class="st">'+(si+1)+'. '+sq.stem.replace(/\n/g,'<br>')+'</div>';
-        if(sq.type==='choice'){shtml+='<div class="opts">';sq.opts.forEach((o,j)=>{let c='op';shtml+='<button class="'+c+'" onclick="cli(\''+sq.id+'\','+j+')" id="oc'+sq.id+'_'+j+'">'+o+'</button>';});shtml+='</div>';}
-        else{shtml+='<input class="inp" id="ip'+sq.id+'" placeholder="输入答案..."><div class="br"><button class="cf" onclick="cfil(\''+sq.id+'\')">🏎 确认</button><button class="sh" onclick="skip(\''+sq.id+'\')">👀 解析</button></div>';}
+        if(sq.type==='choice'){
+          shtml+='<div class="opts">';
+          sq.opts.forEach(function(o,j2){shtml+='<button class="op" onclick="cli(\''+sq.id+'\','+j2+')" id="oc'+sq.id+'_'+j2+'">'+o+'</button>';});
+          shtml+='</div>';
+        }else{
+          shtml+='<input class="inp" id="ip'+sq.id+'" placeholder="输入答案..."><div class="br"><button class="cf" onclick="cfil(\''+sq.id+'\')">🏎 确认</button><button class="sh" onclick="skip(\''+sq.id+'\')">👀 解析</button></div>';
+        }
       });
       sdiv.innerHTML=shtml;cd.appendChild(sdiv);
     }
   }
+  if(cd)cd.appendChild(fb);
   upd();
-}
-function retryFill(id){
+}function retryFill(id){
   delete conv[id];let el=document.querySelector('.cd:has(.ht)');
   if(el){let q=Q.find(x=>x.id===id);if(q)el.outerHTML=renderCard(q,0,true);}
   upd();