diff --git a/index.html b/index.html
index be2c86c..a0a3e3d 100644
--- a/index.html
+++ b/index.html
@@ -134,7 +134,7 @@
 <div class="wrap">
   <header>
     <div class="eyebrow">Position Sizer · 逐仓</div>
-    <h1>合约仓位计算器 <span class="sym">/ DOGE-USDT</span></h1>
+    <h1>合约仓位计算器 <span class="sym">/ 通用合约</span></h1>
     <div class="sub">先定亏损上限，再反推仓位。杠杆只决定爆仓距离，不决定你亏多少。</div>
   </header>
 
@@ -193,7 +193,7 @@
         <span class="risk" id="slShow"></span>
       </div>
       <div class="big">
-        <div class="lbl">建议仓位 · DOGE 数量</div>
+        <div class="lbl">建议仓位 · 合约数量</div>
         <div class="val" id="qty">—</div>
       </div>
       <div class="pair">
@@ -291,6 +291,12 @@
 
   const fmtN=(n,d=2)=>isFinite(n)?n.toLocaleString('en-US',{minimumFractionDigits:d,maximumFractionDigits:d}):'—';
   const fmtP=n=>isFinite(n)?n.toLocaleString('en-US',{minimumFractionDigits:5,maximumFractionDigits:5}):'—';
+  // 仓位数量：按量级自适应小数位（大币种如 BTC 量很小，小币种如 DOGE 量上千）
+  const fmtQty=n=>{
+    if(!isFinite(n)) return '—';
+    const d = n>=1000?0 : n>=100?1 : n>=1?2 : n>=0.01?4 : 6;
+    return n.toLocaleString('en-US',{minimumFractionDigits:0,maximumFractionDigits:d});
+  };
 
   function calc(){
     const bal=+$('balance').value, riskPct=+$('riskPct').value, entry=+$('entry').value;
@@ -313,10 +319,10 @@
     const dist=Math.abs(entry-slPrice);
     if(!(dist>0)){ clearOut(); return; }
 
-    const qty = risk/dist;              // DOGE 数量
+    const qty = risk/dist;              // 合约数量
     const notional = qty*entry;         // 名义价值 U
 
-    $('qty').innerHTML = fmtN(qty,0)+' <span class="u">DOGE</span>';
+    $('qty').innerHTML = fmtQty(qty)+' <span class="u">币</span>';
     $('notional').innerHTML = fmtN(notional)+' <span class="u">U</span>';
     $('slPriceShow').textContent = fmtP(slPrice);
     $('slShow').textContent = '止损 '+fmtN(slPctVal)+'%';