css3滑动门

* {
            padding: 0;
            margin: 0;
        }
 
        #subject {
            position: relative;
            width: 80%;
            height: 165px;
            background: skyblue;
            margin: 200px auto;
            overflow: hidden;
        }
 
        #subject > ul > li {
            position: absolute;
            float: left;
            list-style: none;
            width: 40%;
            height: 165px;
            font-size: 48px;
            text-align: center;
            color: #fff;
            line-height: 165px;
            transition: 0.5s;
        }
 
        .item1 {
            background: orange;
            left: 0;
            z-index: 1;
        }
 
        /*hover:item1*/
        #subject.state-1 .item2,
        .item2 {
            background: deepskyblue;
            left: 40%;
            z-index: 2;
        }
 
        /*hover:item2*/
        #subject.state-4 .item2,
        #subject.state-3 .item2,
        #subject.state-2 .item2 {
            left: 20%;
        }
 
        /*hover:item3*/
        #subject.state-4 .item3,
        #subject.state-3 .item3 {
            left: 40%;
        }
        /*hover:item4*/
        #subject.state-4 .item4{
            left: 60%;
        }
 
        #subject.state-1 .item3,
        .item3 {
            background: mediumseagreen;
            left: 60%;
            z-index: 3;
        }
 
        #subject.state-3 .item4,
        #subject.state-2 .item4,
        #subject.state-1 .item4,
        .item4 {
            background: pink;
            left: 80%;
            z-index: 4;
        }

<div id="subject" class="wrapper">
    <ul>
        <li class="item item1">1</li>
        <li class="item item2">2</li>
        <li class="item item3">3</li>
        <li class="item item4">4</li>
    </ul>
</div>

$(function () {
        $(‘.item‘).hover(function () {
            if ($(this).hasClass(‘item1‘)) {
                $(‘#subject‘).removeClass().addClass(‘state-1‘);
 
            }
            if ($(this).hasClass(‘item2‘)) {
                $(‘#subject‘).removeClass().addClass(‘state-2‘);
            }
            if ($(this).hasClass(‘item3‘)) {
                $(‘#subject‘).removeClass().addClass(‘state-3‘);
            }
            if ($(this).hasClass(‘item4‘)) {
                $(‘#subject‘).removeClass().addClass(‘state-4‘);
            }
 
        });
 
        $(‘#subject‘).mouseleave(function () {
            $(‘#subject‘).removeClass();
        });
 
    });