Vue navigation style

now is the help document for point navigation. Skip to the appropriate route, but when I switch on the side navigation, there is no border at the bottom of the navigation at the top. How to solve it?

Mar.14,2021

well, how does state control respond?

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1ec0807-2ada.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ec0807-2ada.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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