.background{
    position: fixed;
    margin:auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background-color: #f5f5f5;
}

.img {
    position: fixed;
    margin: auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.l1_top{
    position: fixed;
    width: 100%;
    top: 0px;
}

.l1_bot{
    position: fixed;
    width: 100%;
    bottom: 0px;
    left: 0px;
}


.img img{
    position: absolute;
    width: 90%;
    left: 5%;
    bottom: 0px;
}

.kanzaki_box{
    text-align: center;
    position: absolute;
    z-index: 1;
    height: auto;
    width: 100px;
    /*background-color: crimson;*/
}

#snow{
    position: absolute;
    z-index: 1;
    opacity: 1;
    width: 100%;
    height: 120%;
    margin: auto;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
}

.kanzaki_box{
    opacity: 0.3;
    width: 100%;
    height: 100%;
}

.btn_box{
    position: fixed;
    z-index: 100;
    bottom: 7%;
    right: 4%;
    width: 7%;
    height: auto;
    /*border-style: dashed;*/
}

button{
    margin-top: 20px;
    width: 100%;
    height: auto;
    color: #FFF;
    font-size: 1rem;
    font-family: "Microsoft YaHei UI Light",Arial;
    border-radius: 10px;
    border-color: rgba(29, 11, 11, 0.63);
    background-color: #000;
    opacity: 0;
}

button:hover{
    /*border-color: #e25151;*/
    border-color: rgba(119, 42, 42, 0.63);
    background-color: rgba(29, 11, 11, 0.63);
    opacity: 1;
}

@media screen and (min-aspect-ratio:19/10) {
    .img img{
        margin: auto;
        left: 0;
        right: 0;
        width: auto;
        height: 90%;
    }

    .l1_top{
        margin: auto;
        left: 0;
        right: 0;
        width: auto;
        height: 95%;
    }

    .l1_bot_w{
        position: fixed;
        margin: auto;
        left: 0;
        right: 0;
        width: auto;
        height: 95%;
        bottom: 0;
    }

    .l1_bot{
        display: none;
    }

}

@media screen and (max-aspect-ratio:19/10){
    .l1_bot_w{
        display: none;
    }
}