diff --git a/src/zotero_kb/templates/index.html b/src/zotero_kb/templates/index.html
index ec6ac8b..4ac0629 100644
--- a/src/zotero_kb/templates/index.html
+++ b/src/zotero_kb/templates/index.html
@@ -461,7 +461,7 @@
         currentCards: [],
         collectionTree: [],
         isImportWindowOpen: false,
-        isImportModalOpen: false,
+        isImportWindowOpen: false,
         windowX: typeof windowSessionState.x === "number" ? windowSessionState.x : null,
         windowY: typeof windowSessionState.y === "number" ? windowSessionState.y : null,
         windowWidth: typeof windowSessionState.width === "number" ? windowSessionState.width : null,
@@ -562,6 +562,110 @@
         );
       }
 
+      function applyWindowPositionAndSize() {
+        const fw = elements.importWindow;
+        if (!fw) return;
+        fw.style.left = state.windowX !== null ? `${state.windowX}px` : "";
+        fw.style.top = state.windowY !== null ? `${state.windowY}px` : "";
+        fw.style.width = state.windowWidth !== null ? `${state.windowWidth}px` : "";
+        fw.style.height = state.windowHeight !== null ? `${state.windowHeight}px` : "";
+      }
+
+      function initWindowFromSession() {
+        const fw = elements.importWindow;
+        const bar = elements.importWindowMinimizedBar;
+        if (state.isWindowMinimized) {
+          fw.classList.add("minimized");
+          fw.classList.remove("maximized");
+          bar.hidden = false;
+        } else if (state.isWindowMaximized) {
+          fw.classList.add("maximized");
+          fw.classList.remove("minimized");
+          fw.style.width = "100vw";
+          fw.style.height = "100vh";
+          fw.style.left = "0";
+          fw.style.top = "0";
+          bar.hidden = true;
+        } else {
+          if (state.windowX !== null) {
+            applyWindowPositionAndSize();
+          }
+          fw.classList.remove("minimized", "maximized");
+          bar.hidden = true;
+        }
+      }
+
+      function startWindowDrag(event) {
+        const fw = elements.importWindow;
+        if (!fw || fw.classList.contains("maximized") || fw.classList.contains("minimized")) return;
+        event.preventDefault();
+        state.isWindowDragging = true;
+        state.windowDragStartX = event.clientX;
+        state.windowDragStartY = event.clientY;
+        state.windowDragStartLeft = parseFloat(fw.style.left) || 0;
+        state.windowDragStartTop = parseFloat(fw.style.top) || 0;
+        fw.style.transition = "none";
+      }
+
+      function moveWindowDrag(event) {
+        if (!state.isWindowDragging) return;
+        event.preventDefault();
+        const fw = elements.importWindow;
+        const dx = event.clientX - state.windowDragStartX;
+        const dy = event.clientY - state.windowDragStartY;
+        let newLeft = state.windowDragStartLeft + dx;
+        let newTop = state.windowDragStartTop + dy;
+        const maxLeft = window.innerWidth - (parseFloat(fw.style.width) || fw.offsetWidth);
+        const maxTop = window.innerHeight - (parseFloat(fw.style.height) || fw.offsetHeight);
+        newLeft = Math.max(0, Math.min(newLeft, maxLeft));
+        newTop = Math.max(0, Math.min(newTop, maxTop));
+        fw.style.left = `${newLeft}px`;
+        fw.style.top = `${newTop}px`;
+        state.windowX = newLeft;
+        state.windowY = newTop;
+      }
+
+      function endWindowDrag() {
+        if (!state.isWindowDragging) return;
+        state.isWindowDragging = false;
+        persistWindowSessionState();
+      }
+
+      function minimizeWindow() {
+        state.isWindowMinimized = true;
+        state.isWindowMaximized = false;
+        elements.importWindow.classList.add("minimized");
+        elements.importWindow.classList.remove("maximized");
+        elements.importWindowMinimizedBar.hidden = false;
+        persistWindowSessionState();
+      }
+
+      function maximizeWindow() {
+        state.isWindowMaximized = !state.isWindowMaximized;
+        if (state.isWindowMaximized) {
+          state.isWindowMinimized = false;
+          elements.importWindow.classList.add("maximized");
+          elements.importWindow.classList.remove("minimized");
+          elements.importWindowMinimizedBar.hidden = true;
+          elements.importWindow.style.width = "100vw";
+          elements.importWindow.style.height = "100vh";
+          elements.importWindow.style.left = "0";
+          elements.importWindow.style.top = "0";
+        } else {
+          elements.importWindow.classList.remove("maximized");
+          applyWindowPositionAndSize();
+        }
+        persistWindowSessionState();
+      }
+
+      function restoreWindow() {
+        state.isWindowMinimized = false;
+        elements.importWindow.classList.remove("minimized");
+        elements.importWindowMinimizedBar.hidden = true;
+        applyWindowPositionAndSize();
+        persistWindowSessionState();
+      }
+
       function setStatus(target, message, isError = false) {
         target.textContent = message || "";
         target.classList.toggle("error", Boolean(isError));
@@ -677,7 +781,7 @@
       }
 
       function renderSelectedCount() {
-        elements.selectedCount.textContent = `已选 ${state.selectedItemKeys.size} 篇`;
+        elements.windowSelectedCount.textContent = `已选 ${state.selectedItemKeys.size} 篇`;
       }
 
       function resetCollectionItemsLoadingState(clearItems = false) {
@@ -694,21 +798,20 @@
         if (currentProject) {
           const label = `当前项目：${currentProject.name}`;
           elements.currentProjectLabel.textContent = label;
-          elements.importModalProjectLabel.textContent = label;
+          elements.windowProjectLabel.textContent = label;
           return;
         }
         elements.currentProjectLabel.textContent = "当前未选择项目。";
-        elements.importModalProjectLabel.textContent = "未选择项目";
+        elements.windowProjectLabel.textContent = "未选择项目";
       }
 
       function updateImportActionState() {
         const hasProject = Boolean(state.currentProjectId);
         const hasSelection = state.selectedItemKeys.size > 0;
         syncCurrentProjectLabels();
-        elements.importSelectedItemsButton.disabled = !hasProject || !hasSelection;
-        elements.importSelectedItemsButton.title = !hasProject ? "请先选择项目" : (hasSelection ? "" : "请先选择文献");
-        elements.selectDescendantsButton.disabled = !state.collectionItemsLoaded || !state.visibleCollectionItems.length;
-        elements.clearSelectionButton.disabled = !state.selectedItemKeys.size;
+        elements.windowImportSelectedItemsButton.disabled = !hasProject || !hasSelection;
+        elements.windowImportSelectedItemsButton.title = !hasProject ? "请先选择项目" : (hasSelection ? "" : "请先选择文献");
+        elements.windowClearSelectionButton.disabled = !state.selectedItemKeys.size;
         renderSelectedCount();
       }
 
@@ -752,11 +855,11 @@
 
       function renderCollectionTree() {
         if (!state.collectionTree.length) {
-          elements.collectionTree.innerHTML = '<div class="empty">暂无 collection。</div>';
+          elements.windowCollectionTree.innerHTML = '<div class="empty">暂无 collection。</div>';
           return;
         }
 
-        elements.collectionTree.innerHTML = "";
+        elements.windowCollectionTree.innerHTML = "";
         const fragment = document.createDocumentFragment();
 
         function appendNode(node, depth) {
@@ -801,7 +904,7 @@
           `;
           button.addEventListener("click", () => {
             loadCollectionItems(node.collection_key).catch((error) => {
-              setStatus(elements.collectionStatus, error.message, true);
+              setStatus(elements.windowCollectionStatus, error.message, true);
             });
           });
           row.appendChild(button);
@@ -818,29 +921,29 @@
         for (const node of state.collectionTree) {
           appendNode(node, 0);
         }
-        elements.collectionTree.appendChild(fragment);
+        elements.windowCollectionTree.appendChild(fragment);
       }
 
       function renderCollectionItems() {
         if (!state.selectedCollectionKey) {
-          elements.collectionItems.innerHTML = '<div class="empty">先选择一个 collection。</div>';
+          elements.windowCollectionItems.innerHTML = '<div class="empty">先选择一个 collection。</div>';
           updateImportActionState();
           return;
         }
         if (!state.collectionItemsLoaded) {
-          elements.collectionItems.innerHTML = state.loadingCollectionKey === state.selectedCollectionKey
+          elements.windowCollectionItems.innerHTML = state.loadingCollectionKey === state.selectedCollectionKey
             ? '<div class="empty">正在加载当前 collection 文献。</div>'
             : '<div class="empty">当前 collection 文献尚未加载。</div>';
           updateImportActionState();
           return;
         }
         if (!state.visibleCollectionItems.length) {
-          elements.collectionItems.innerHTML = '<div class="empty">当前目录及子目录下没有可导入文献。</div>';
+          elements.windowCollectionItems.innerHTML = '<div class="empty">当前目录及子目录下没有可导入文献。</div>';
           updateImportActionState();
           return;
         }
 
-        elements.collectionItems.innerHTML = "";
+        elements.windowCollectionItems.innerHTML = "";
         for (const item of state.visibleCollectionItems) {
           const row = document.createElement("label");
           row.className = "project-item";
@@ -856,13 +959,13 @@
             </div>
           `;
           row.querySelector("input").addEventListener("change", () => toggleItemSelection(item.item_key));
-          elements.collectionItems.appendChild(row);
+          elements.windowCollectionItems.appendChild(row);
         }
         updateImportActionState();
       }
 
       async function loadCollectionTree() {
-        setStatus(elements.collectionStatus, "正在加载 collection...");
+        setStatus(elements.windowCollectionStatus, "正在加载 collection...");
         const payload = await api("/api/zotero/collections/tree");
         state.collectionTree = Array.isArray(payload.collections) ? payload.collections : [];
         normalizeSelectedCollectionKey();
@@ -876,7 +979,7 @@
         state.visibleCollectionItems = [];
         resetCollectionItemsLoadingState();
         renderCollectionItems();
-        setStatus(elements.collectionStatus, "");
+        setStatus(elements.windowCollectionStatus, "");
       }
 
       async function loadCollectionItems(collectionKey) {
@@ -888,7 +991,7 @@
           resetCollectionItemsLoadingState(true);
           renderCollectionTree();
           renderCollectionItems();
-          setStatus(elements.collectionStatus, state.selectedCollectionKey ? "已切换到可用 collection。" : "");
+          setStatus(elements.windowCollectionStatus, state.selectedCollectionKey ? "已切换到可用 collection。" : "");
           if (state.selectedCollectionKey) {
             await loadCollectionItems(state.selectedCollectionKey);
           }
@@ -903,7 +1006,7 @@
         state.nextCollectionItemsRequestToken = requestToken;
         state.activeCollectionItemsRequestToken = requestToken;
         renderCollectionItems();
-        setStatus(elements.collectionStatus, "正在加载文献...");
+        setStatus(elements.windowCollectionStatus, "正在加载文献...");
         try {
           const payload = await api(`/api/zotero/collections/${collectionKey}/items`);
           if (state.activeCollectionItemsRequestToken !== requestToken || state.selectedCollectionKey !== collectionKey) {
@@ -915,7 +1018,7 @@
           renderCollectionItems();
           const visibleCount = state.visibleCollectionItems.length;
           setStatus(
-            elements.collectionStatus,
+            elements.windowCollectionStatus,
             visibleCount ? `当前目录及子目录共 ${visibleCount} 篇文献。` : "当前目录及子目录下没有可导入文献。"
           );
         } catch (error) {
@@ -959,7 +1062,7 @@
           updateImportActionState();
           return;
         }
-        setStatus(elements.collectionStatus, "正在导入...");
+        setStatus(elements.windowCollectionStatus, "正在导入...");
         const payload = await api(`/api/projects/${state.currentProjectId}/imports/item-keys`, {
           method: "POST",
           body: JSON.stringify({ item_keys: Array.from(state.selectedItemKeys) }),
@@ -968,22 +1071,24 @@
         persistImportSessionState();
         renderCollectionItems();
         renderCards(payload.project_view?.cards || []);
-        setStatus(elements.collectionStatus, "导入完成。");
+        setStatus(elements.windowCollectionStatus, "导入完成。");
         updateImportActionState();
-        closeImportModal();
+        closeImportWindow();
       }
 
-      async function openImportModal() {
-        state.isImportModalOpen = true;
-        elements.importModal.hidden = false;
-        elements.importModal.setAttribute("aria-hidden", "false");
+      async function openImportWindow() {
+        state.isImportWindowOpen = true;
+        elements.importWindowShell.hidden = false;
+        elements.importWindowShell.setAttribute("aria-hidden", "false");
         document.body.classList.toggle("modal-open", true);
+        cancelAbstractPreview();
         updateImportActionState();
+        initWindowFromSession();
         if (!state.collectionTree.length) {
           try {
             await loadCollectionTree();
           } catch (error) {
-            setStatus(elements.collectionStatus, error.message, true);
+            setStatus(elements.windowCollectionStatus, error.message, true);
           }
         } else if (
           state.selectedCollectionKey &&
@@ -992,7 +1097,7 @@
           try {
             await loadCollectionItems(state.selectedCollectionKey);
           } catch (error) {
-            setStatus(elements.collectionStatus, error.message, true);
+            setStatus(elements.windowCollectionStatus, error.message, true);
           }
         } else {
           renderCollectionTree();
@@ -1000,11 +1105,12 @@
         }
       }
 
-      function closeImportModal() {
-        state.isImportModalOpen = false;
-        elements.importModal.hidden = true;
-        elements.importModal.setAttribute("aria-hidden", "true");
+      function closeImportWindow() {
+        state.isImportWindowOpen = false;
+        elements.importWindowShell.hidden = true;
+        elements.importWindowShell.setAttribute("aria-hidden", "true");
         document.body.classList.toggle("modal-open", false);
+        cancelAbstractPreview();
       }
 
       async function loadProjects() {
@@ -1071,20 +1177,28 @@
       elements.refreshProjectsButton.addEventListener("click", loadProjects);
 
       elements.openImportModalButton.addEventListener("click", () => {
-        openImportModal();
+        openImportWindow();
       });
-      elements.closeImportModalButton.addEventListener("click", closeImportModal);
-      elements.importModalOverlay.addEventListener("click", closeImportModal);
-      elements.selectDescendantsButton.addEventListener("click", selectVisibleItems);
-      elements.clearSelectionButton.addEventListener("click", clearSelectedItems);
-      elements.importSelectedItemsButton.addEventListener("click", () => {
+      elements.windowCloseButton.addEventListener("click", closeImportWindow);
+      elements.windowMinimizeButton.addEventListener("click", minimizeWindow);
+      elements.windowMaximizeButton.addEventListener("click", maximizeWindow);
+      elements.windowRestoreButton.addEventListener("click", restoreWindow);
+      elements.importWindowMinimizedBar.addEventListener("click", (e) => {
+        if (e.target === elements.windowRestoreButton) return;
+        restoreWindow();
+      });
+      elements.windowToolbar.addEventListener("pointerdown", startWindowDrag);
+      document.addEventListener("pointermove", moveWindowDrag);
+      document.addEventListener("pointerup", endWindowDrag);
+      elements.windowClearSelectionButton.addEventListener("click", clearSelectedItems);
+      elements.windowImportSelectedItemsButton.addEventListener("click", () => {
         importSelectedItems().catch((error) => {
-          setStatus(elements.collectionStatus, error.message, true);
+          setStatus(elements.windowCollectionStatus, error.message, true);
         });
       });
       document.addEventListener("keydown", (event) => {
-        if (event.key === "Escape" && state.isImportModalOpen) {
-          closeImportModal();
+        if (event.key === "Escape" && state.isImportWindowOpen) {
+          closeImportWindow();
         }
       });
 
@@ -1139,7 +1253,7 @@
       elements.recommendTab.addEventListener("click", () => activateTab("recommend"));
       elements.planTab.addEventListener("click", () => activateTab("plan"));
 
-      closeImportModal();
+      closeImportWindow();
       updateImportActionState();
       loadProjects().catch((error) => {
         setStatus(elements.projectStatus, error.message, true);