*{
    margin: 0;
    padding: 0;
    list-style: none;
}
html,body,.wrapper{
    width: 100%;
    height: 100%;
}
.wrapper{
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
}
.wrapper .content{
    position: relative;
    width: 80%;
    height: 80%;
    /* font-size: 0; */
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.wrapper .content .item{
    position: relative;
    width: 19%;
    height: 100%;
    /* margin:0 1%; */
    /* border: 1px solid white; */
    background-color: #999;
    border-radius: 20px;
    transition: width 0.5s,height 0.5s 0.5s;
}
.wrapper .content .item .inner{
    position: relative;
    width: 100%;
    height: 100%;
}
.wrapper .active .item:not(.choosed){
    height: 0;
    width: 0;
    transition: height 0.5s,width 0.5s 0.5s;
}
.wrapper .active .choosed{
    width: 100%;
    transition: width 0.5s 0.5s;
}
.wrapper .content .item:nth-of-type(1) .inner{
    transition: transform 0.7s;
}
.wrapper .content .item:nth-of-type(2) .inner{
    transition: transform 0.7s 0.1s;
}
.wrapper .content .item:nth-of-type(3) .inner{
    transition: transform 0.7s 0.2s;
}
.wrapper .content .item:nth-of-type(4) .inner{
    transition: transform 0.7s 0.3s;
}
.wrapper .content .item:nth-of-type(5) .inner{
    transition: transform 0.7s 0.4s;
}
.init .content .item .inner{
    transform: translate3d(0,100%,0);
}
.wrapper .content .item .inner .title{
    position: absolute;
    font-size: 40px;
    line-height: 100%;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%,-50%,0)
}
.wrapper .active .item .inner .title{
    display: none;
}
.wrapper .content .item .inner .bg{
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background-size: cover;
    background-repeat: no-repeat;
    background-position:center;
    opacity: 0.7;
}
.wrapper .content .choosed .inner .bg{
    opacity: 1;
}
.wrapper .content .item .inner .bg:hover{
    opacity: 1;
}
.item:nth-of-type(1) .inner .bg{
    background-image: url('Dota_bg.jpg');
    transition: transform 0.5s;
}
.item:nth-of-type(2) .inner .bg{
    background-image: url('SF.jpg');
    transition: transform 0.5s;
}
.item:nth-of-type(3) .inner .bg{
    background-image: url('huska.jpg');
    transition: transform 0.5s;
}
.item:nth-of-type(4) .inner .bg{
    background-image: url('axe.jpg');
    transition: transform 0.5s;
}
.item:nth-of-type(5) .inner .bg{
    background-image: url('黑鸟.jpg');
    transition: transform 0.5s;
}
.wrapper .active .choosed .inner .dir{
    position: absolute;
    width: 100%;
    height: 40px;
    font-size: 30px;
    line-height: 40px;
    top: 0;
    color: #fff;
    display: block;
}
.wrapper .active .choosed .inner .dir .header{
    position: absolute;
    left: 15px;
    font-weight: 600;
}
.wrapper .active .choosed .inner .dir .close{
    position: absolute;
    top: 5px;
    right: 15px;
}
.wrapper .active .choosed .inner .dir .close:hover{
    transform: rotateZ(360deg);
    transition: transform 0.5s;
}