CSS：

.slide{
    height:568px;
    overflow: hidden;
}
.staff{
    -webkit-user-select: none;
    -webkit-user-drag: none;
    -webkit-tap-highlight-color: rgba(0,0);
    touch-action: none;
    -webkit-transform-origin: 0px 0px 0px;
    opacity: 1;
    -webkit-transform: scale(1,1);
    width:33%;
    height:568px;
    background:red;
    float: left;
}
.staff-matt{
    background:red;
    Box-shadow: rgba(0,0.298039) 4px 4px 10px 0px;
}
.staff-shail{
    background:white;
    Box-shadow: rgba(0,0.298039) 4px 4px 10px 0px;
}
.staff-leah{
    background:red;
    Box-shadow: rgba(0,0.298039) 4px 4px 10px 0px;
}

#text1,#text3{
    position:relative;
    background-color:white;
    width:50%;
}

JS：

$('.staff').click(function(){
    if($(this).hasClass('clicked')){
        $('.staff').animate({width:'33%'});
    } else {
        $('.staff').not(this).animate({width:'0%'});
        $(this).animate({width:'100%'});
    }
    $(this).toggleClass('clicked');
});