diff --git a/static/src/styles/components/chat/_chat-area.scss b/static/src/styles/components/chat/_chat-area.scss
index 872fa93..0e4d328 100644
--- a/static/src/styles/components/chat/_chat-area.scss
+++ b/static/src/styles/components/chat/_chat-area.scss
@@ -1429,7 +1429,7 @@ show-html:not([data-rendered='1'])[ratio='3:4'] {
 
 .code-block-wrapper pre {
   background: var(--theme-surface-strong) !important;
-  padding: 24px 28px 28px !important;
+  padding: 18px 20px 22px !important;
   margin: 0 !important;
   border-radius: 0 !important;
   border: none !important;
@@ -1451,6 +1451,8 @@ show-html:not([data-rendered='1'])[ratio='3:4'] {
 .code-block-wrapper pre code {
   background: transparent !important;
   padding: 0 !important;
+  border: 0 !important;
+  box-shadow: none !important;
   color: var(--claude-text);
   font-family:
     'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', 'Menlo', 'Monaco', 'Courier New',
@@ -1464,6 +1466,20 @@ show-html:not([data-rendered='1'])[ratio='3:4'] {
   animation: none !important; /* 避免被其他动画样式污染导致行距抖动 */
 }
 
+:root[data-theme='dark'] .code-block-wrapper pre,
+:root[data-theme='dark'] .code-block-wrapper pre code,
+:root[data-theme='dark'] .code-block-wrapper pre code span {
+  background: transparent !important;
+  border: 0 !important;
+  box-shadow: none !important;
+  outline: 0 !important;
+  text-shadow: none !important;
+}
+
+:root[data-theme='dark'] .code-block-wrapper pre {
+  background: var(--theme-surface-strong) !important;
+}
+
 .streaming-text {
   display: block;
 }