fix: 修复登录页面文案居中问题

xinkeaboard-admin/src/pages/User/Login.js

@@ -193,7 +193,7 @@ export default class LoginPage extends Component {
                   </div> */}
                   <Button 
                    type='primary' 
-                   className={`${styles.sld_login_btn} ${global.flex_row_center_center}`} 
+                   className={`${styles.sld_login_btn}`} 
                    loading={loading} 
                    onClick={() => this.props.form.submit(this.handleSubmits)}
                   >

xinkeaboard-admin/src/pages/User/Login.less

@@ -93,10 +93,10 @@
       justify-content: center;
       margin-top: 65px;
       .sld_login_btn{
-        cursor: pointer;
         width: 300px;
         height: 40px;
-        background: @theme-color;
+        line-height: 40px;
+        // background: @theme-color;
         border-radius: 5px;
         color: #fff;
         font-size: 19px;