html,body{
    margin:0;padding:0;
    font-size:12px;
    font-family: 'Arial';
}
.top{
    background-image: url(../pc/top.png);
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    /*display: flex;*/
    /*justify-content: center;*/
}