header{
    position: static;
    /*background-color: rgba(31,33,44,0.6);*/
}
.myNav{
    z-index: 10;
    background-color: rgba(31,33,44,0.6);
}
main{
    margin: 20px 0;
}
.mainTop{
    position: relative;
}
.mainTop img{
    width: 100%;
    height: 400px;
    object-fit: cover;
}
main .content img{
    max-width: 100%;
}
.title{
    text-align: center;
    border-bottom: 1px dotted #dbdbdb;
    padding-bottom: 1px;
    margin-bottom: 20px;
}
.title h3{
    margin-bottom: 20px;
}
.content{
    text-indent:2em;
    font-size: 15px;
    line-height: 26px;
}
@media (max-width: 768px){
    img{
        width: 100%;
    }
}