diff --git a/argontheme.js b/argontheme.js
index b1956d0..62d3114 100644
--- a/argontheme.js
+++ b/argontheme.js
@@ -524,8 +524,35 @@ $(document).on("change" , ".search-filter" , function(e){
 			leftbarPart2.classList.add('sticky');
 			if (leftbarPart3) {
 				leftbarPart3.classList.add('sticky');
-				// 动态设置 part2 高度变量
+				// 计算可用空间并分配给 part2 和 part3
+				let viewportHeight = window.innerHeight;
+				let topOffset = argonConfig.headroom !== 'absolute' ? 90 : 20;
+				let availableHeight = viewportHeight - topOffset - 20; // 20px 底部边距
+				
+				// 获取 part3 的自然高度（不受限制时的高度）
+				leftbarPart3.style.maxHeight = 'none';
+				let part3NaturalHeight = leftbarPart3.scrollHeight;
+				leftbarPart3.style.maxHeight = '';
+				
+				// 最小高度限制
+				let minPart2Height = 150;
+				let minPart3Height = 100;
+				
+				// 计算分配
+				let part2Height, part3MaxHeight;
+				if (part3NaturalHeight + minPart2Height <= availableHeight) {
+					// part3 可以完全显示
+					part3MaxHeight = part3NaturalHeight;
+					part2Height = availableHeight - part3NaturalHeight - 10;
+				} else {
+					// 需要按比例分配，part2 占 60%，part3 占 40%
+					part2Height = Math.max(minPart2Height, availableHeight * 0.6);
+					part3MaxHeight = Math.max(minPart3Height, availableHeight - part2Height - 10);
+				}
+				
 				document.documentElement.style.setProperty('--leftbar-part2-height', leftbarPart2.offsetHeight + 10 + 'px');
+				document.documentElement.style.setProperty('--leftbar-part3-height', part3MaxHeight + 'px');
+				document.documentElement.style.setProperty('--leftbar-part3-max-height', part3MaxHeight + 'px');
 			}
 		}else{
 			//滚动条在顶部 不浮动状态
diff --git a/sidebar.php b/sidebar.php
index 91345d3..d792376 100644
--- a/sidebar.php
+++ b/sidebar.php
@@ -558,9 +558,9 @@ $author_desc = get_option('argon_sidebar_author_description');
 												return;
 											}
 											
-											// 检测是否有标题已经带序号（如 "1. xxx" 或 "1.1 xxx"）
-											var numberPattern = /^[\d一二三四五六七八九十]+[.、．]\s*/;
-											var hasNumberedHeadings = false;
+											// 检测是否有标题已经带序号
+											// 支持格式：1. 1.1 一、二、第一、第二、(1) (一) [1] 等
+											var numberPattern = /^([\d一二三四五六七八九十百千]+[.、．:：]\s*|第[一二三四五六七八九十百千\d]+[章节部分条款、]\s*|[（\(【\[]\s*[\d一二三四五六七八九十]+\s*[）\)】\]]\s*|[IVXLCDM]+[.、．]\s*)/;
 											var numberedCount = 0;
 											
 											items.forEach(function(item) {
@@ -571,7 +571,7 @@ $author_desc = get_option('argon_sidebar_author_description');
 											});
 											
 											// 如果超过一半的标题已有序号，认为文章自带编号
-											hasNumberedHeadings = numberedCount > items.length / 2;
+											var hasNumberedHeadings = numberedCount > items.length / 2;
 											
 											if (!hasNumberedHeadings) {
 												// 添加 CSS 计数器样式
diff --git a/style.css b/style.css
index 6847290..3c71da6 100644
--- a/style.css
+++ b/style.css
@@ -2531,13 +2531,9 @@ html.navbar-absolute #leftbar_part2.sticky {
 }
 
 #leftbar_part2_inner {
-
-	max-height: calc(100vh - 110px);
-
+	max-height: calc(100vh - 110px - var(--leftbar-part3-height, 0px));
 	overflow-y: auto;
-
 	padding: 10px;
-
 }
 
 #leftbar_part2_inner::-webkit-scrollbar {
@@ -12607,6 +12603,16 @@ article .post-content .huhua a:before {
 	position: fixed;
 	top: calc(80px + var(--leftbar-part2-height, 300px));
 	width: 240px;
+	max-height: var(--leftbar-part3-max-height, 50vh);
+	overflow: hidden;
+	display: flex;
+	flex-direction: column;
+}
+
+#leftbar_part3.sticky .card-body {
+	overflow-y: auto;
+	flex: 1;
+	min-height: 0;
 }
 
 body.leftbar-can-headroom.headroom---unpinned #leftbar_part3.sticky {
@@ -12706,7 +12712,7 @@ html.navbar-absolute #leftbar_part3.sticky {
 }
 
 .todo-list-scroll {
-	max-height: 240px;
+	max-height: none;
 	overflow-y: auto;
 	padding-right: 5px;
 }