.mainsection{
    background-color: #250D0F;
    width:100%;
}

.mainsection > div {
    width:100%;
    text-align: center;
}

.silder {
    position: relative;
    width:100%;
    height: 360px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 15px;
}

.silder img {
    position: absolute;
    width:100%;
    max-width:600px;
    left:auto;
    right: auto;
    opacity: 0;
}

.intro {
    width:100%;
    padding: 10px 15px 15px 15px;
    box-sizing: border-box;
}

.intro p {
    width:100%;
    font-size: 16px;
    line-height: 2em;
    letter-spacing: 2px;
    text-align: justify;
}

.intro p:last-child{
    padding-top: 1em;
}


@media (min-width:786px){
    .intro {
        padding: 10px 30px 15px 30px;
    }

    .intro p {
        font-size: 18px;
        letter-spacing: 1px;
    }
}

@media (min-width:990px){

    .mainsection {
        display: flex;
        flex-direction: row;
        justify-content: center;
        width:100%;
        padding:3% 5%;
        box-sizing: border-box;
    }

    .intro{
        padding: 10px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .silder{
        height: 380px;
        padding: 0px;
        order:1;
    }

}