div.box {
    width: 550px;
    height: 413px;
}

div.box a.phone-display {
    display: block;
    position: relative;
    height: 100%;
}


div.bottom-nav{
    margin-top: 20px;
}

div.bottom-nav div.tab-btn{
    position: relative;
    width: 40px;
    height: 60px;
    cursor: pointer;
}

div.tab-btn:hover{
    opacity: .6;
}

div.tab-btn.btn-left{
    float: left;
}

div.tab-btn.btn-right{
    float: right;
}

i.shift-icon {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    width: 26px;
    height: 26px;
    border: 1px solid #999;
    border-radius: 50%;
}

i.shift-icon>span {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 10px;
    height: 10px;
    border-bottom: 1.5px solid #999;
}

div.btn-left i.shift-icon>span {
    border-left: 1.5px solid #999;
    transform: translate(-30%, -50%) rotate(45deg);
}
div.btn-right i.shift-icon>span {
    border-right: 1.5px solid #999;
    transform: translate(-70%, -50%) rotate(-45deg);
}


div.bottom-nav div.bottom-center-nav{
    position: relative;
    height: 60px;
    margin: 0 50px;
    overflow: hidden;
}
div.bottom-center-nav ul.small-img-ul {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
}
ul.small-img-ul li.img{
    float: left;
    width: 60px;
    height: 100%;
    border:1px solid transparent;
    background-size: 100% 100%;
    cursor: pointer;
}
ul.small-img-ul li.img.active{
    border-color: rgb(160, 27, 27);
}