diff --git a/src/pages/chat/utils/format.ts b/src/pages/chat/utils/format.ts
index 45e6d22..3baed1b 100644
--- a/src/pages/chat/utils/format.ts
+++ b/src/pages/chat/utils/format.ts
@@ -8,11 +8,5 @@ export function formatMessageContent(content: string): string {
 
   return content
     // 将 3 个及以上的换行替换为 2 个
-    .replace(/\n{3,}/g, '\n\n')
-    // 针对 Markdown 块元素，将双换行缩小为单换行
-    // 匹配 \n\n 后面跟着 #, -, *, >, --- 等
-    .replace(/\n\n(?=[#\-*>]|---)/g, '\n')
-    // 匹配 #, -, *, >, --- 后面跟着 \n\n
-    // 由于 JavaScript 不支持所有环境下的 lookbehind，我们先处理上面的
-    .replace(/([#\-*>]|---)\n\n/g, '$1\n');
+    .replace(/\n{3,}/g, '\n\n');
 }
diff --git a/src/styles.css b/src/styles.css
index 84c9e51..93a96fd 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -762,7 +762,7 @@ body {
   display: inline-block;
   padding: 8px;
   border-radius: 14px;
-  white-space: pre-wrap;
+  white-space: pre-line;
   word-wrap: break-word;
   line-height: 1.5;
   font-size: 14.5px;
@@ -785,61 +785,47 @@ body {
   border: 0;
   border-bottom-left-radius: 5px;
   box-shadow: none;
-  white-space: normal;
-}
-
-.bubble.assistant p {
-  margin: 0 0 5px;
-}
-
-.bubble.assistant p:last-child {
-  margin-bottom: 0;
 }
 
+.bubble.assistant p,
 .bubble.assistant h1,
 .bubble.assistant h2,
 .bubble.assistant h3,
 .bubble.assistant h4,
 .bubble.assistant h5,
-.bubble.assistant h6 {
-  margin: 0.2em 0 0.1em;
-  line-height: 1.3;
-}
-
+.bubble.assistant h6,
 .bubble.assistant ol,
 .bubble.assistant ul {
-  margin: 0.15em 0;
-  padding-left: 1.25em;
+  margin: 0;
+  padding-left: 1.5em;
 }
 
 .bubble.assistant li {
-  margin: 0.05em 0;
+  margin: 0;
 }
 
 .bubble.assistant hr {
-  margin: 0.4em 0;
-}
-
-.bubble.assistant li > p {
-  margin: 0.15em 0;
+  margin: 12px 0;
+  border: 0;
+  border-top: 1px solid rgba(0, 0, 0, 0.1);
 }
 
 .bubble.assistant blockquote {
-  margin: 0.2em 0;
-  padding: 0.2em 0.6em;
+  margin: 8px 0;
+  padding: 4px 12px;
   border-left: 3px solid var(--color-border);
   background: rgba(15, 23, 42, 0.03);
-  border-radius: 8px;
+  border-radius: 4px;
 }
 
 .bubble.assistant blockquote p {
-  margin: 0.2em 0;
+  margin: 0;
 }
 
 .bubble.assistant table {
   border-collapse: collapse;
   width: 100%;
-  margin: 0.35em 0;
+  margin: 12px 0;
   font-size: 13.5px;
 }