diff --git a/apps/web/src/components/models/post/editor/form/LetterBasicForm.tsx b/apps/web/src/components/models/post/editor/form/LetterBasicForm.tsx
index 3545a0d..1e70a51 100644
--- a/apps/web/src/components/models/post/editor/form/LetterBasicForm.tsx
+++ b/apps/web/src/components/models/post/editor/form/LetterBasicForm.tsx
@@ -182,7 +182,9 @@ export function LetterBasicForm() {
 							onClick={handleSubmit}
 							size="large"
 							icon={<SendOutlined />}
-							className="w-full sm:w-40">
+							style={{
+								width: 150,
+							}}>
 							发送信件
 						</Button>
 					</div>