diff --git a/frontend/src/pages/Document/DocumentPage.css b/frontend/src/pages/Document/DocumentPage.css
index ffcf49d..ff425ea 100644
--- a/frontend/src/pages/Document/DocumentPage.css
+++ b/frontend/src/pages/Document/DocumentPage.css
@@ -178,6 +178,13 @@
   flex-direction: column;
 }
 
+.docs-toc-sider .ant-layout-sider-children {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  min-height: 0;
+}
+
 .toc-header {
   padding: 16px;
   border-bottom: 1px solid var(--border-color);
@@ -196,12 +203,15 @@
 
 .toc-content {
   flex: 1;
+  min-height: 0;
   overflow-y: auto;
   overflow-x: auto;
   padding: 16px;
 }
 
 .toc-content .ant-anchor {
+  display: block;
+  min-height: max-content;
   padding-left: 0;
   padding-bottom: 65px;
   /* 给Anchor组件添加底部内边距，避免最后一项被遮挡 */
diff --git a/frontend/src/pages/Preview/PreviewPage.css b/frontend/src/pages/Preview/PreviewPage.css
index 962a703..852169a 100644
--- a/frontend/src/pages/Preview/PreviewPage.css
+++ b/frontend/src/pages/Preview/PreviewPage.css
@@ -152,6 +152,13 @@
   flex-direction: column;
 }
 
+.preview-toc-sider .ant-layout-sider-children {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  min-height: 0;
+}
+
 .toc-header {
   padding: 16px;
   border-bottom: 1px solid var(--border-color);
@@ -170,13 +177,17 @@
 
 .toc-content {
   flex: 1;
+  min-height: 0;
   overflow-y: auto;
   overflow-x: auto;
   padding: 16px;
 }
 
 .toc-content .ant-anchor {
+  display: block;
+  min-height: max-content;
   padding-left: 0;
+  padding-bottom: 65px;
 }
 
 .toc-content .ant-anchor-link {