@media screen and (min-width: 1260px) { .nav-back{ display:none; } .nav-next{ display:none; } } .nav-back{ position: absolute; left: 0px; top: 50%; width: 43px; height: 66px; z-index: 99; background-image: url(/img/right_fanye.png); background-size: 100% 100%; } .nav-next{ position: absolute; right: 0px; top: 50%; width: 43px; height: 66px; background-image: url(/img/right_fanye.png); background-size: 100% 100%; z-index: 99; }