fix: under checked multi-tab

Author: sendya

src/layouts/BasicLayout.vue

@@ -40,7 +40,7 @@
       />
 
       <!-- layout content -->
-      <a-layout-content :style="{ height: '100%', margin: multiTab ? '24px 24px 0' : '24px 24px 0', paddingTop: fixedHeader ? '64px' : '0' }">
+      <a-layout-content :style="{ height: '100%', margin: '24px 24px 0', paddingTop: fixedHeader ? '64px' : '0' }">
         <multi-tab v-if="multiTab"></multi-tab>
         <transition name="page-transition">
           <route-view />