.sideBar { position:fixed; right:-182px; top:50px; background-color:#ffffff; border:#eea236 solid 1px; transition:right 0.5s; border:solid 1px red; } .sideBar:hover { right:0; } .sideBar>div { position:relative; } .sideBar .tips { position:absolute; height:120px; line-height:25px; background-color:#eea236; width:40px; left:-40px; top:50px; text-align:center; box-sizing:border-box; padding:10px 10px; border-top-left-radius:5px; border-bottom-left-radius:5px; font-weight:bold; color:#ffffff; } .sideBar .list { padding:0; list-style:none; width:180px; margin:0; } .sideBar .list>li { padding:15px; border-top:#eea236 dashed 1px; } .sideBar .list>li:hover { background-color:#f0ad4e; color:#ffffff; } .sideBar .list>li:first-child { border-top:none; }