查看themes/print.css #menu-left { display: none; } 查看網頁原始檔 <section class="mt-5 min-vh-100" > <div class="container-fluid"> <div class="row flex-nowrap"> <div class="col-auto col-md-3 col-xl-2 px-sm-2 px-0 bg-white" > <div class="d-flex flex-column align-items-center align-items-sm-start px-3 pt-2 text-white "> <ul class="nav nav-pills flex-column mb-sm-auto mb-0 align-items-center align-items-sm-start" id="menu"> 比對其它網站網頁原始檔 第4行沒有給id,加入就可以了 <div class="col-auto col-md-3 col-xl-2 px-sm-2 px-0 bg-white" id="menu-left">