layout样式优化

src/components/layout/index.tsx

@@ -14,7 +14,6 @@ const headerStyle: React.CSSProperties = {
 };
 
 const contentStyle: React.CSSProperties = {
-  textAlign: 'center',
   minHeight: 120,
   lineHeight: '1',
   color: '',
@@ -22,7 +21,6 @@ const contentStyle: React.CSSProperties = {
 };
 
 const footerStyle: React.CSSProperties = {
-  textAlign: 'center',
   color: '',
   backgroundColor: '',
   lineHeight: '1',