.video iframe {
    height: 520px;
    width: 100%;
}

.big-thanks {
    padding: 80px 15px;
}

.section-about h2 {
    text-transform: uppercase;
}

.big-thanks .noi-dung {
    max-width: 1300px;
    margin: 0 auto;
    text-align: center;
}

.big-thanks .noi-dung p {
    text-align: center;
}

.introduce-item .wrap-img {
    padding-bottom: 62.5%;
}

.introduce {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.introduce-item .noi-dung {
    max-width: 400px;
    margin: 0 auto;
    
}

.introduce:nth-child(odd) .item-left {
    order: 1;
}

.introduce:nth-child(1) .item-right {
    background-color: #daefda;
}

.introduce:nth-child(2) .item-right {
    background-color: #f9ebe0;
}

.introduce:nth-child(3) .item-right {
    background-color: #fcebee;
}

.introduce .item-right {
    height: 100%;
    display: flex;
    align-items: center;
    padding: 24px;
}

.gg-map iframe {
    height: 600px;
    width: 100%;
}

@media (max-width: 992px) { 
    .introduce {
        grid-template-columns: repeat(1, 1fr);
    }

    .introduce:nth-child(odd) .item-left {
        order: unset;
    }

    .introduce-item .noi-dung {
        max-width: 100%;
    }

}

@media (max-width: 768px) {
    .video iframe {
        height: 340px;
    }

    .big-thanks  {
        padding: 40px 15px;
    }

    .gg-map iframe {
        height: 300px;
    }
}