#focus_Box {
    position: relative;
    width: 80%;
    height: 500px;
    margin: 0 auto 100px;
}

    #focus_Box ul {
        position: relative;
        width: 900px;
        margin: 0 auto;
        height: 500px;
    }

    #focus_Box li {
        z-index: 0;
        position: absolute;
        width: 0px;
        height: 0px;
        top: 146px;
        cursor: pointer;
        left: 350px;
        border-radius: 4px;
        box-shadow: 1px 1px 32px rgba(0, 0, 0, 1);
    }

        #focus_Box li img {
            width: 100%;
            background: url(/images/loading.gif) no-repeat center 100%;
            height: 100%;
            vertical-align: top;
        }

    #focus_Box .prev, #focus_Box .next {
        display: block;
        z-index: 100;
        overflow: hidden;
        cursor: pointer;
        position: absolute;
        width: 60px;
        height: 114px;
        top: 195px;
    }

    #focus_Box .prev {
        background: url(/images/btns.png) left bottom no-repeat;
        left: 0px;
    }

    #focus_Box .next {
        background: url(/images/btns.png) right bottom no-repeat;
        right: 0px;
    }

    #focus_Box .prev:hover {
        background-position: left top;
    }

    #focus_Box .next:hover {
        background-position: right top;
    }