diff --git a/biji-qianduan/src/components/HomePage.vue b/biji-qianduan/src/components/HomePage.vue
index 9e1b81d..6a4fbbb 100644
--- a/biji-qianduan/src/components/HomePage.vue
+++ b/biji-qianduan/src/components/HomePage.vue
@@ -196,7 +196,7 @@
 
 <script setup>
 import {onMounted, ref, nextTick, watch, h, computed} from 'vue';
-import {ElMessage, ElSubMenu, ElMenuItem, ElIcon, ElMessageBox} from 'element-plus';
+import {ElMessage, ElSubMenu, ElMenuItem, ElIcon, ElMessageBox, ElTooltip} from 'element-plus';
 import Vditor from 'vditor';
 import 'vditor/dist/index.css';
 import {
@@ -428,24 +428,34 @@ const resetNoteForm = () => {
 };
 
 const renderMenu = (item) => {
-  if (item.children && item.children.length > 0) {
-    return h(ElSubMenu, { index: `group-${item.id}` }, {
-      title: () => h('div', { class: 'menu-item-title', onClick: () => selectFile(item) }, [
-        h(ElIcon, () => h(Folder)),
-        h('span', null, item.grouping),
-        h(ElIcon, { class: 'edit-icon', onClick: (e) => { e.stopPropagation(); openRenameDialog(item, 'group'); } }, () => h(Edit)),
-        h(ElIcon, { class: 'delete-icon', onClick: (e) => { e.stopPropagation(); handleDeleteGroup(item); } }, () => h(Delete))
-      ]),
-      default: () => item.children.map(child => renderMenu(child))
-    });
-  }
-  return h(ElMenuItem, { index: `group-${item.id}`, onClick: () => selectFile(item) }, {
-    default: () => h('div', { class: 'menu-item-title' }, [
-      h(ElIcon, () => h(Folder)),
-      h('span', null, item.grouping),
+  const titleContent = () => h('div', { class: 'menu-item-title' }, [
+    h(ElIcon, () => h(Folder)),
+    h('span', { class: 'menu-item-text' }, item.grouping),
+    h('div', { class: 'menu-item-actions' }, [
       h(ElIcon, { class: 'edit-icon', onClick: (e) => { e.stopPropagation(); openRenameDialog(item, 'group'); } }, () => h(Edit)),
       h(ElIcon, { class: 'delete-icon', onClick: (e) => { e.stopPropagation(); handleDeleteGroup(item); } }, () => h(Delete))
     ])
+  ]);
+
+  const wrappedContent = () => h(ElTooltip, {
+    content: item.grouping,
+    placement: 'right',
+    disabled: !isCollapsed.value,
+    effect: 'dark',
+    offset: 15,
+  }, {
+    default: titleContent
+  });
+
+  if (item.children && item.children.length > 0) {
+    return h(ElSubMenu, { index: `group-${item.id}` }, {
+      title: () => h('div', { onClick: () => selectFile(item), style: 'width: 100%;' }, [ wrappedContent() ]),
+      default: () => item.children.map(child => renderMenu(child))
+    });
+  }
+  
+  return h(ElMenuItem, { index: `group-${item.id}`, onClick: () => selectFile(item) }, {
+    default: wrappedContent
   });
 };
 
@@ -500,132 +510,61 @@ const handleImageUpload=async (files) => {
     ElMessage.error(promise.msg);
     return;
   }
-  // 插入图片（确保URL格式正确）
-  const imageUrl = promise.data.url.startsWith('/')
-      ? `http://127.0.0.1:8084${promise.data.url}`
-      : promise.data.url;
-  
-  vditor.value.insertValue(`![](${imageUrl})`);
+  const url = promise.data;
+  imageUrls.value.push(url);
+  vditor.value.insertValue(`![${files[0].name}](${url})`);
 }
 
-// 在编辑页面，按Ctrl+S保存笔记，或者点击保存，对数据进行保存
-const handleSave= async (content, isAutoSave = false) => {
-  imageUrls.value = extractImageUrls(content);
-  extractDeletedImageUrls(imageUrls.value)
-  editData.value.content = content
-  const filesRes = await updateMarkdown(editData.value);
-  if (filesRes.code === 200) {
-    // 关键修复：用后端返回的、带有ID的最新数据更新本地状态
-    editData.value = filesRes.data;
-    if (selectedFile.value) {
-      selectedFile.value.id = filesRes.data.id; // 确保预览对象也有ID
-    }
-
-    if (!isAutoSave) {
-      ElMessage.success(filesRes.msg);
-    }
-    await chushihua();
-  } else {
-    if (!isAutoSave) {
-      ElMessage.error(filesRes.msg);
-    }
-    throw new Error(filesRes.msg);
-  }
-}
-
-// 保存时获取所有的图片url
-const extractImageUrls = (data) => {
-  const content = data
-  const urls = [];
-
-  // 处理 URL 的内部函数
-  const getPathFromUrl = (url) => {
-    try {
-      if (url.startsWith('http://') || url.startsWith('https://')) {
-        // 使用 URL 对象解析路径
-        return new URL(url).pathname;
-      }
-      return url; // 非 HTTP(S) URL 直接返回（如 base64）
-    } catch (e) {
-      return url; // 解析失败时返回原始 URL
-    }
-  };
-
-  // 匹配Markdown图片语法
-  const mdRegex = /!\[.*?\]\((.*?)\)/g;
-  let mdMatch;
-  while ((mdMatch = mdRegex.exec(content)) !== null) {
-    urls.push(getPathFromUrl(mdMatch))
-  }
-
-  // 匹配HTML img标签
-  const htmlRegex = /<img[^>]+src="([^">]+)"/g;
-  let htmlMatch;
-  while ((htmlMatch = htmlRegex.exec(content)) !== null) {
-    urls.push(getPathFromUrl(htmlMatch));
-  }
-
-  // 匹配base64图片
-  const base64Regex = /<img[^>]+src="(data:image\/[^;]+;base64[^">]+)"/g;
-  let base64Match;
-  while ((base64Match = base64Regex.exec(content)) !== null) {
-    urls.push(base64Match);
-  }
-
-  // 过滤和去重
-  const validUrls = urls.filter(url => {
-    return url.startsWith('http') || url.startsWith('data:image');
-  });
-  return [...new Set(validUrls)]
-};
-
-// 笔记保存时获取要删除的图片url
-const extractDeletedImageUrls = (data) => {
-  const delImages = []
-  // 原来的url originalImages.value
-  for (let i = 0; i <originalImages.value.length; i++) {
-    for (let j = 0; j <data.length; j++) {
-        if (originalImages.value[i] !== data[j]){
-          delImages.push(originalImages.value[i])
-        }
-    }
-  }
-  if (delImages.length>0){
-    deleteImages(delImages)
-  }
-}
-
-// 删除笔记
-const deleteNote = async (file) => {
-  try {
-    await deleteMarkdown(file.id);
-    ElMessage.success('删除成功');
-    selectedFile.value = null;
-    await chushihua()
-    await selectFile(groupingId)
-  } catch (error) {
-    ElMessage.error('删除失败: ' + error.message);
-  }
-};
-
-const debouncedSave = (content) => {
+const debouncedSave = (value) => {
   saveStatus.value = '正在输入...';
   clearTimeout(debounceTimer);
-  debounceTimer = setTimeout(async () => {
-    saveStatus.value = '正在保存...';
-    try {
-      // 直接使用 vditor.value.getValue() 获取最新内容
-      await handleSave(vditor.value.getValue(), true);
-      saveStatus.value = '已保存';
-    } catch (error) {
-      saveStatus.value = '保存失败';
+  debounceTimer = setTimeout(() => {
+    handleSave(value);
+  }, 2000);
+};
+
+const handleSave = async (content) => {
+  saveStatus.value = '正在保存...';
+  try {
+    const newImageUrls = extractImageUrls(content);
+    const deletedImages = originalImages.value.filter(url => !newImageUrls.includes(url));
+
+    if (deletedImages.length > 0) {
+      await deleteImages({ imageUrls: deletedImages });
     }
-  }, 2000); // 2-second delay
+
+    originalImages.value = newImageUrls;
+
+    const payload = {
+      ...editData.value,
+      content: content,
+    };
+    const response = await updateMarkdown(payload);
+    editData.value = response.data;
+    selectedFile.value = editData.value;
+    saveStatus.value = '已保存';
+    ElMessage.success('保存成功');
+    await fetchGroupings();
+    await fetchMarkdownFiles();
+  } catch (error) {
+    saveStatus.value = '保存失败';
+    ElMessage.error('保存失败: ' + error.message);
+  }
+};
+
+const extractImageUrls = (markdown) => {
+  const regex = /!\[.*?\]\((.*?)\)/g;
+  const urls = [];
+  let match;
+  while ((match = regex.exec(markdown)) !== null) {
+    urls.push(match);
+  }
+  return urls;
 };
 
 const openRenameDialog = (item, type) => {
   itemToRename.value = { ...item, type };
-  newName.value = type === 'group' ? item.grouping : item.title;
+  newName.value = type === 'file' ? item.title : item.grouping;
   showRenameDialog.value = true;
 };
 
@@ -634,87 +573,135 @@ const handleRename = async () => {
     ElMessage.error('名称不能为空');
     return;
   }
-
   try {
-    if (itemToRename.value.type === 'group') {
-      await updateGroupingName(itemToRename.value.id, newName.value);
-      ElMessage.success('分类重命名成功');
-      await fetchGroupings();
-    } else if (itemToRename.value.type === 'file') {
-      await updateMarkdownTitle(itemToRename.value.id, newName.value);
-      ElMessage.success('笔记重命名成功');
-      selectedFile.value.title = newName.value;
-      await fetchMarkdownFiles();
+    if (itemToRename.value.type === 'file') {
+      await updateMarkdownTitle({ id: itemToRename.value.id, title: newName.value });
+      if (selectedFile.value && selectedFile.value.id === itemToRename.value.id) {
+        selectedFile.value.title = newName.value;
+      }
+    } else {
+      await updateGroupingName({ id: itemToRename.value.id, grouping: newName.value });
     }
-    showRenameDialog.value = false;
+    ElMessage.success('重命名成功');
+    await fetchGroupings();
+    await fetchMarkdownFiles();
   } catch (error) {
     ElMessage.error('重命名失败: ' + error.message);
+  } finally {
+    showRenameDialog.value = false;
   }
 };
 
-// 上传Markdown文件处理
+const handleDeleteGroup = (group) => {
+  ElMessageBox.confirm(
+    `确定要删除分类 “${group.grouping}” 吗？这将同时删除该分类下的所有子分类和笔记。`,
+    '警告',
+    {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'warning',
+    }
+  ).then(async () => {
+    try {
+      await apiDeleteGrouping(group.id);
+      ElMessage.success('分类已删除');
+      await fetchGroupings();
+      await fetchMarkdownFiles();
+      if (activeMenu.value.startsWith('group-') && activeMenu.value.endsWith(group.id)) {
+        activeMenu.value = 'all';
+        groupMarkdownFiles.value = markdownFiles.value;
+      }
+    } catch (error) {
+      ElMessage.error('删除分类失败: ' + error.message);
+    }
+  }).catch(() => {
+    // 用户取消操作
+  });
+};
+
+const deleteNote = (file) => {
+  ElMessageBox.confirm(
+      `确定要删除笔记 “${file.title}” 吗？`,
+      '警告',
+      {
+        confirmButtonText: '确定',
+        cancelButtonText: '取消',
+        type: 'warning',
+      }
+  ).then(async () => {
+    try {
+      await deleteMarkdown(file.id);
+      ElMessage.success('笔记已删除');
+      selectedFile.value = null;
+      await fetchMarkdownFiles();
+      // Optionally, refresh the current group's file list
+      if (activeMenu.value.startsWith('group-')) {
+        const groupId = activeMenu.value.split('-');
+        await selectFile({ id: groupId });
+      }
+    } catch (error) {
+      ElMessage.error('删除笔记失败: ' + error.message);
+    }
+  });
+};
+
 const handleMarkdownUpload = (file) => {
-  const reader = new FileReader();
-  reader.onload = (e) => {
-    fileToImport.value = {
-      content: e.target.result,
-      title: file.name.replace('.md', ''),
-      fileName: file.name,
-    };
-    showSelectGroupDialog.value = true;
-  };
-  reader.readAsText(file);
-  return false; // 阻止默认上传行为
+  fileToImport.value = file;
+  showSelectGroupDialog.value = true;
+  return false; // 阻止 el-upload 自动上传
 };
 
 const confirmImport = async () => {
   if (!importGroupId.value) {
-    ElMessage.error('请选择一个分类');
+    ElMessage.error('请选择要导入的分类');
+    return;
+  }
+  const reader = new FileReader();
+  reader.onload = async (e) => {
+    const content = e.target.result;
+    const payload = {
+      title: fileToImport.value.name.replace(/\.md$/, ''),
+      groupingId: importGroupId.value,
+      content: content,
+      fileName: fileToImport.value.name
+    };
+    try {
+      await updateMarkdown(payload);
+      ElMessage.success('Markdown 文件导入成功');
+      await fetchGroupings();
+      await fetchMarkdownFiles();
+      showSelectGroupDialog.value = false;
+    } catch (error) {
+      ElMessage.error('导入失败: ' + error.message);
+    }
+  };
+  reader.readAsText(fileToImport.value);
+};
+
+const handleMoveNote = async () => {
+  if (!moveToGroupId.value) {
+    ElMessage.error('请选择目标分类');
     return;
   }
   try {
-    await updateMarkdown({
-      ...fileToImport.value,
-      groupingId: importGroupId.value,
-    });
-    ElMessage.success('导入成功');
-    showSelectGroupDialog.value = false;
-    await chushihua();
+    const payload = {
+      ...selectedFile.value,
+      groupingId: moveToGroupId.value
+    };
+    await updateMarkdown(payload);
+    ElMessage.success('笔记移动成功');
+    showMoveNoteDialog.value = false;
+    selectedFile.value = null;
+    await fetchGroupings();
+    await fetchMarkdownFiles();
   } catch (error) {
-    ElMessage.error('导入失败: ' + error.message);
+    ElMessage.error('移动失败: ' + error.message);
   }
 };
 
-onMounted(() => {
-  chushihua();
-  // 根据屏幕宽度初始化侧边栏状态
-  if (window.innerWidth < 768) {
-    isCollapsed.value = true;
-  }
-});
-
-const  chushihua = async () => {
-  await fetchMarkdownFiles();
-  await fetchGroupings();
-  await fetchRecentFiles();
-}
-
-const goToLogin = () => {
-  router.push('/login');
-};
-
-const goToRegister = () => {
-  router.push('/register');
-};
-
-const handleLogout = () => {
-  userStore.logout();
-  router.push('/login');
-};
-
 const handleSearch = async () => {
-  if (!searchKeyword.value) {
-    await fetchMarkdownFiles();
+  if (!searchKeyword.value.trim()) {
+    groupMarkdownFiles.value = markdownFiles.value;
     return;
   }
   try {
@@ -728,106 +715,66 @@ const handleSearch = async () => {
 const handleExportMd = () => {
   if (!selectedFile.value) return;
   const blob = new Blob([selectedFile.value.content], { type: 'text/markdown;charset=utf-8' });
-  const url = window.URL.createObjectURL(blob);
+  const url = URL.createObjectURL(blob);
   const link = document.createElement('a');
   link.href = url;
-  link.setAttribute('download', `${selectedFile.value.title}.md`);
+  link.download = `${selectedFile.value.title}.md`;
   document.body.appendChild(link);
   link.click();
   document.body.removeChild(link);
-  window.URL.revokeObjectURL(url);
+  URL.revokeObjectURL(url);
 };
 
-const handleMoveNote = async () => {
-  if (!moveToGroupId.value) {
-    ElMessage.error('请选择目标分类');
-    return;
-  }
-  if (!selectedFile.value) {
-    ElMessage.error('没有选中的笔记');
-    return;
-  }
-
-  try {
-    const updatedFile = {
-      ...selectedFile.value,
-      groupingId: moveToGroupId.value,
-    };
-    await updateMarkdown(updatedFile);
-    ElMessage.success('笔记移动成功');
-    showMoveNoteDialog.value = false;
-    selectedFile.value = null; // 返回列表页
-    await chushihua(); // 刷新数据
-  } catch (error) {
-    ElMessage.error('移动失败: ' + error.message);
-  }
+const goToLogin = () => {
+  router.push('/login');
 };
 
-const handleDeleteGroup = async (group) => {
-  try {
-    await ElMessageBox.confirm(
-      '确定要删除这个分类吗？分类下的所有笔记将被移动到“未分类”。',
-      '警告',
-      {
-        confirmButtonText: '确定',
-        cancelButtonText: '取消',
-        type: 'warning',
-      }
-    );
-
-    const unclassifiedGroup = categoryTree.value.find(g => g.grouping === '未分类');
-    if (!unclassifiedGroup) {
-      ElMessage.error('未找到“未分类”目录，无法移动笔记。');
-      return;
-    }
-
-    const notesToMove = await markdownList(group.id);
-    if (notesToMove.data && notesToMove.data.length > 0) {
-      for (const note of notesToMove.data) {
-        await updateMarkdown({ ...note, groupingId: unclassifiedGroup.id });
-      }
-    }
-
-    await apiDeleteGrouping(group.id);
-    ElMessage.success('分类删除成功');
-    await fetchGroupings();
-  } catch (error) {
-    if (error !== 'cancel') {
-      ElMessage.error('删除失败: ' + (error.message || ''));
-    }
-  }
+const goToRegister = () => {
+  router.push('/register');
 };
 
-const fetchRecentFiles = async () => {
-  try {
-    const res = await getRecentFiles();
-    // 与 selectFile 等接口保持一致，axios拦截器已处理一层data
-    groupMarkdownFiles.value = res.data;
-  } catch (error) {
-    console.error('获取最近文件失败:', error);
-    ElMessage.error('获取最近文件失败');
-  }
+const handleLogout = () => {
+  userStore.logout();
+  ElMessage.success('已退出登录');
+  router.push('/login');
 };
 
-const resetToHomeView = () => {
+const resetToHomeView = async () => {
   selectedFile.value = null;
-  fetchRecentFiles();
+  showEditor.value = false;
+  searchKeyword.value = '';
+  try {
+    const response = await getRecentFiles();
+    groupMarkdownFiles.value = response.data;
+  } catch (error) {
+    ElMessage.error('获取最近文件失败: ' + error.message);
+    groupMarkdownFiles.value = [];
+  }
 };
+
+onMounted(async () => {
+  await fetchGroupings();
+  await resetToHomeView();
+});
+
+watch(activeMenu, (newVal) => {
+  if (newVal === 'all') {
+    resetToHomeView();
+  }
+});
 </script>
 
 <style>
-/* 对话框全局样式覆盖 */
+/* 全局 Element Plus 样式覆盖 */
 .el-dialog {
-  background-color: var(--bg-color-tertiary) !important;
-  border-radius: 12px !important;
+  border-radius: 8px !important;
   box-shadow: var(--box-shadow-dark) !important;
-  animation: fadeIn 0.3s ease-out, slideInUp 0.3s ease-out;
 }
 
 .el-dialog__header {
-  padding: 20px 20px 10px !important;
-  margin-right: 0 !important;
   border-bottom: 1px solid var(--border-color-light);
+  padding: 15px 20px !important;
+  margin-right: 0 !important;
 }
 
 .el-dialog__title {
@@ -836,10 +783,37 @@ const resetToHomeView = () => {
 }
 
 .el-dialog__body {
-  padding: 25px 20px !important;
+  padding: 20px !important;
+}
+
+.el-form-item__label {
   color: var(--text-color-secondary);
 }
 
+.el-input__wrapper, .el-cascader {
+  background-color: var(--bg-color-secondary) !important;
+  box-shadow: none !important;
+  border-radius: 6px !important;
+}
+
+.el-input__inner {
+  color: var(--text-color) !important;
+}
+
+.el-button--primary {
+  background-color: var(--primary-color);
+  border-color: var(--primary-color);
+  transition: all var(--transition-duration) ease;
+}
+.el-button--primary:hover {
+  background-color: var(--primary-color-dark);
+  border-color: var(--primary-color-dark);
+}
+
+.el-button {
+  border-radius: 6px;
+}
+
 .el-dialog__footer {
   padding: 10px 20px 20px !important;
   border-top: 1px solid var(--border-color-light);
@@ -881,247 +855,180 @@ const resetToHomeView = () => {
 <style scoped>
 .home-page {
   height: 100vh;
-  background-color: var(--bg-color-secondary);
   overflow: hidden;
 }
 
-/* --- Sidebar --- */
 .sidebar {
-  background: var(--bg-color);
-  border-right: 1px solid var(--border-color-light);
+  border-right: 1px solid var(--border-color);
+  transition: width 0.3s ease;
+  background-color: var(--bg-color);
   display: flex;
   flex-direction: column;
-  transition: width var(--transition-duration) ease;
+  overflow-x: hidden;
 }
 
 .sidebar-header {
   padding: 15px;
   display: flex;
-  justify-content: center;
   align-items: center;
+  justify-content: space-between;
   border-bottom: 1px solid var(--border-color-light);
   flex-shrink: 0;
 }
 
-.sidebar-header span {
-  color: var(--text-color);
-  font-size: 16px;
-}
-
-.sidebar-header .el-button {
-  transition: all var(--transition-duration) ease;
-}
-.sidebar-header .el-button:hover {
-  transform: scale(1.1);
-}
-
 .el-menu-vertical-demo {
-  flex: 1;
-  overflow-y: auto;
   border-right: none;
-  background-color: transparent;
-  padding: 8px;
+  flex-grow: 1;
+  overflow-y: auto;
+  overflow-x: hidden;
 }
 
-:deep(.el-sub-menu__title),
-.el-menu-item {
-  border-radius: 6px;
-  margin-bottom: 4px;
-  color: var(--text-color-secondary);
-  transition: all var(--transition-duration) ease;
+.el-menu-vertical-demo:not(.el-menu--collapse) {
+  width: 100%;
 }
 
-:deep(.el-sub-menu__title:hover),
-.el-menu-item:hover {
-  background-color: var(--bg-color-tertiary);
-  color: var(--text-color);
-}
-
-.el-menu-item.is-active {
-  background-color: var(--primary-color-light);
-  color: var(--primary-color) !important;
-  font-weight: bold;
+:deep(.el-menu-item),
+:deep(.el-sub-menu__title) {
+  width: 100%;
 }
 
 .menu-item-title {
   display: flex;
   align-items: center;
+  justify-content: space-between;
   width: 100%;
+  gap: 5px;
 }
 
-.menu-item-title span {
-  flex: 1;
+.menu-item-text {
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
+  flex-grow: 1;
+}
+
+.menu-item-actions {
+  display: none;
+  align-items: center;
+  gap: 5px;
+}
+
+.el-menu:not(.el-menu--collapse) .el-menu-item:hover .menu-item-actions,
+.el-menu:not(.el-menu--collapse) .el-sub-menu__title:hover .menu-item-actions {
+  display: flex;
+}
+
+.el-menu--collapse .menu-item-text,
+.el-menu--collapse .menu-item-actions {
+  display: none;
 }
 
 .edit-icon, .delete-icon {
   cursor: pointer;
-  margin-left: 8px;
-  opacity: 0;
-  transition: opacity var(--transition-duration) ease;
   color: var(--text-color-secondary);
 }
-.delete-icon:hover {
-  color: var(--el-color-danger);
-}
-.edit-icon:hover {
+
+.edit-icon:hover, .delete-icon:hover {
   color: var(--primary-color);
 }
 
-.el-sub-menu__title:hover .edit-icon,
-.el-sub-menu__title:hover .delete-icon,
-.el-menu-item:hover .edit-icon,
-.el-menu-item:hover .delete-icon,
-.preview-title:hover .edit-icon {
-  opacity: 1;
-}
-
-/* --- Content Area --- */
 .content {
-  padding: 24px;
+  padding: 0;
+  background-color: var(--bg-color-secondary);
   height: 100vh;
-  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
 }
 
-.header {
+.header, .preview-header {
   display: flex;
   justify-content: space-between;
   align-items: center;
-  margin-bottom: 24px;
+  padding: 15px 20px;
+  background-color: var(--bg-color);
+  border-bottom: 1px solid var(--border-color);
 }
 
-.header h1 {
-  color: var(--text-color);
-  font-size: 28px;
-  font-weight: 600;
+.preview-title {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.preview-title .edit-icon {
+  visibility: visible;
+  opacity: 0.6;
+}
+.preview-title .edit-icon:hover {
+  opacity: 1;
 }
 
 .actions {
   display: flex;
+  gap: 10px;
   align-items: center;
-  gap: 12px;
-}
-
-.actions span {
-  color: var(--text-color-secondary);
-  font-size: 14px;
 }
 
 .search-input {
-  width: 240px;
+  width: 250px;
 }
 
 .file-list {
-  display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
-  gap: 20px;
+  padding: 20px;
+  flex-grow: 1;
+  overflow-y: auto;
 }
 
 .file-item {
+  margin-bottom: 15px;
   cursor: pointer;
-  border-radius: 8px;
-  border: 1px solid var(--border-color-light);
-  background-color: var(--bg-color);
-  box-shadow: var(--box-shadow-light);
-  transition: all var(--transition-duration) ease;
-  animation: slideInUp 0.4s ease-out;
+  transition: all 0.2s ease;
 }
 
 .file-item:hover {
-  transform: translateY(-5px);
-  box-shadow: var(--box-shadow);
-  border-color: var(--primary-color);
+  transform: translateY(-2px);
+  box-shadow: var(--box-shadow-light);
 }
 
 .file-title {
-  font-size: 16px;
-  font-weight: 500;
-  color: var(--text-color);
-  padding: 20px;
   display: flex;
   justify-content: space-between;
   align-items: center;
 }
 
 .file-group-name {
-  font-size: 12px;
+  font-size: 0.8em;
   color: var(--text-color-secondary);
-  background-color: var(--bg-color-tertiary);
-  padding: 2px 8px;
+  background-color: var(--bg-color-mute);
+  padding: 2px 6px;
   border-radius: 4px;
 }
 
-/* --- File Preview --- */
 .file-preview {
-  height: 100%;
   display: flex;
   flex-direction: column;
-  background-color: var(--bg-color);
-  border-radius: 8px;
-  box-shadow: var(--box-shadow);
-  overflow: hidden;
-  animation: fadeIn 0.5s;
+  height: 100%;
 }
 
-.preview-header {
-  display: flex;
-  padding: 12px 20px;
-  justify-content: space-between;
-  align-items: center;
-  border-bottom: 1px solid var(--border-color-light);
-  flex-shrink: 0;
-}
-
-.preview-title {
-  display: flex;
-  align-items: center;
-  font-size: 20px;
-  font-weight: 600;
-  color: var(--text-color);
-}
-
-.preview-title .edit-icon {
-  margin-left: 12px;
-}
-
-.markdown-preview, .vditor {
-  flex: 1;
+.markdown-preview {
   padding: 20px;
-  background: var(--bg-color);
-  border: none;
+  flex-grow: 1;
   overflow-y: auto;
+  background-color: var(--bg-color);
+}
+
+.vditor {
+  flex-grow: 1;
+  border: none;
 }
 
 .save-status {
-  margin-left: 10px;
   font-size: 14px;
-  color: var(--text-color-placeholder);
-  transition: all var(--transition-duration) ease;
-}
-.save-status:not(:empty) {
-  animation: fadeIn 0.5s;
+  color: var(--text-color-secondary);
 }
 
-/* --- Responsive --- */
-@media (max-width: 768px) {
-  .sidebar {
-    position: absolute;
-    z-index: 1001;
-    box-shadow: var(--box-shadow-dark);
-  }
-  .sidebar:not(.el-aside--collapse) {
-    width: 250px;
-  }
-  .content {
-    padding: 15px;
-  }
-  .file-list {
-    grid-template-columns: 1fr;
-  }
-  .header h1 {
-    font-size: 22px;
-  }
+.upload-btn {
+  display: inline-block;
+  margin-left: 10px;
 }
 </style>