html,body{
    padding: 0;
    margin: 0;
    font-size: 20px;
}

#box{
    box-sizing: border-box;
}
.bgImg{
    width: 100%;
    max-height: 100%;
    position: fixed;
    object-fit: cover;
    margin: auto;
}
.main{
    max-width: 50%;
    position: absolute;
    top: 70%;
    left: 50%;
    transform: translate(-50%,-50%);
}

.imgPad{
    padding-top: 5rem;
}
.btnPad{
    padding: 2rem 0;
}
.imgBox,.btn{
    width: 100%;
    margin: auto;
    display: flex;
    justify-content: center;
}
.footer{
    text-align: center;
    font-family: sans-serif;
    white-space: nowrap;
    position: absolute; 
    bottom: 5px; 
    left: 50%; 
    transform: translate(-50%); 
    font-size: 10px; 
    color: #666; 
    /* font-size: 2rem; */
}

.footer a:visited,.footer a:link 
{
    color: #666; 
}

.bot{
    display: flex;
    justify-content: center;
}
#beianGovIcon{
    margin-right: 0.5rem;
}
.btn{
    display: flex;
    justify-content: center;
}
@media screen and (min-width: 330px) and (max-width: 800px) {
    .bgImg{
        width: 100%;
        height: 100%;
        position: fixed;
        object-fit: cover;
        z-index: -1;
    }
    .main{
        width: 80%;
        max-width: 75%;
        position: absolute;
        top: 70%;
        left: 50%;
        transform: translate(-50%,-50%);
    }
}