feature:

样式调整；
顶部菜单调整

components/BlogAround.js

@@ -8,6 +8,9 @@ import { faAngleDoubleLeft, faAngleDoubleRight } from '@fortawesome/free-solid-s
  * @returns
  */
 export default function BlogAround ({ prev, next }) {
+  if (!prev || !next) {
+    return <></>
+  }
   return <section className='text-gray-800 mb-8 lg:mb-32 border-t dark:text-gray-300 px-5 flex flex-wrap lg:flex-nowrap lg:space-x-10 justify-between py-2'>
     <Link href={`/article/${prev.slug}`} passHref>
       <a className='text-sm py-3 text-blue-500 hover:underline cursor-pointer'>