diff --git a/index.html b/index.html
index 40edfc1..e3b90c6 100644
--- a/index.html
+++ b/index.html
@@ -1075,17 +1075,33 @@ function copyQuestionPrompt(qId) {
     }
   }
 
-  navigator.clipboard.writeText(prompt).then(() => {
-    const btn = document.querySelector(`[data-copy="${qId}"]`);
+  const btn = document.querySelector(`[data-copy="${qId}"]`);
+  const showCopied = () => {
     if (btn) {
       btn.textContent = '✅ 已复制';
       btn.classList.add('copied');
       setTimeout(() => { btn.textContent = '📋 复制题目'; btn.classList.remove('copied'); }, 1500);
     }
-  });
+  };
+
+  if (navigator.clipboard && navigator.clipboard.writeText) {
+    navigator.clipboard.writeText(prompt).then(showCopied).catch(() => fallbackCopy(prompt, showCopied));
+  } else {
+    fallbackCopy(prompt, showCopied);
+  }
 }
 
 // ─── Util ───
+function fallbackCopy(text, onSuccess) {
+  const ta = document.createElement('textarea');
+  ta.value = text;
+  ta.style.cssText = 'position:fixed;left:-9999px;opacity:0';
+  document.body.appendChild(ta);
+  ta.select();
+  try { document.execCommand('copy'); onSuccess(); } catch (_) {}
+  document.body.removeChild(ta);
+}
+
 function escapeHtml(s) {
   if (!s) return '';
   return s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');