CSS3实现菜单悬停效果

 @import url(https://fonts.googleapis.com/css?family=Raleway); body { margin: 0px; } nav { margin-top: 40px; padding: 24px; text-align: center; font-family: Raleway; box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5); } #nav-1 { background: #3fa46a; } #nav-2 { background: #5175C0; } #nav-3 { background: #EEA200; } .link-1 { transition: 0.3s ease; background: #3fa46a; color: #ffffff; font-size: 20px; text-decoration: none; border-top: 4px solid #3fa46a; border-bottom: 4px solid #3fa46a; padding: 20px 0; margin: 0 20px; } .link-1:hover { border-top: 4px solid #ffffff; border-bottom: 4px solid #ffffff; padding: 6px 0; } .link-2 { transition: 0.6s; color: #ffffff; font-size: 20px; text-decoration: none; border-right: 2px dotted transparent; padding: 30px 8px 0 10px; margin: 0 10px; } .link-2:hover { border-right: 2px dotted #ffffff; padding-bottom: 24px; } .link-3 { transition: 0.4s; color: #ffffff; font-size: 20px; text-decoration: none; padding: 0 10px; margin: 0 10px; } .link-3:hover { background-color: #ffffff; color: #EEA200; padding: 24px 10px; }