diff --git a/frontend/index.html b/frontend/index.html
index 4f22ce4..93d33f7 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -214,7 +214,7 @@
             const checked = selectedTags[tag.id] !== undefined;
             const optionsHtml = tag.options.map(o => `
                 <label class="radio-label">
-                    <input type="radio" name="tag_${tag.id}" value="${o.id}" ${selectedTags[tag.id] === o.id ? 'checked' : ''} onchange="selectTagOption(${tag.id}, ${o.id})">
+                    <input type="radio" name="tag_${tag.id}" value="${o.id}" ${selectedTags[tag.id] === o.id ? 'checked' : ''} onclick="selectTagOption(${tag.id}, ${o.id})">
                     <span class="text-sm">${escapeHtml(o.label)}</span>
                 </label>
             `).join('');
@@ -255,7 +255,18 @@
         }
 
         function selectTagOption(tagId, optionId) {
-            selectedTags[tagId] = optionId;
+            if (selectedTags[tagId] === optionId) {
+                // 再次点击已选中的选项 → 取消选择（需要 renderTags 重建 DOM 以取消 radio 的 checked 状态）
+                delete selectedTags[tagId];
+                renderTags();
+            } else {
+                selectedTags[tagId] = optionId;
+                // 同步勾选父标签复选框
+                const checkbox = document.querySelector(`#tag-options-${tagId}`)
+                    ?.closest('.mb-2')
+                    ?.querySelector('input[type="checkbox"]');
+                if (checkbox) checkbox.checked = true;
+            }
             updatePreview();
         }