.shouye .z-nav-conter > li > a{border-left-width: 1px; border-left-style: solid; border-left-color: #EEEEEE; padding-left: 32px; padding-right: 22px;} .shouye .z-nav a:before{content: ""; width: 30px; margin-left: -10px; height: 2px; background: #86c14b; display: block; position: absolute; left: 1px; bottom: 0; opacity: 0; -webkit-transition: opacity 0.4s ease-in-out, left 0.4s ease-in-out; transition: opacity 0.4s ease-in-out, left 0.4s ease-in-out;} .shouye .z-nav ul li a:hover::before{left: 50%; opacity: 1;}