@media (max-width:1280px) {
    .wrapper-main {
        width: 960px;
    }

    .banner {
        height: 360px;
        display: flex;
        justify-content: center;
        overflow: hidden;
    }

    .banner img {
        height: 100%;
        width: auto;
        max-width: none;
    }
}

@media (max-width:960px) {
    .wrapper-main {
        width: 750px;
    }
}

@media (max-width:750px) {
    .wrapper-main {
        width: 100%;
        padding-left: 10px;
        padding-right: 10px;
        box-sizing: border-box;
    }

    .banner {
        height: 360px;
        display: flex;
        justify-content: center;
        overflow: hidden;
    }

    .banner a img {
        height: 100%;
        width: auto;
        max-width: none;
    }

    .text-list {
        flex-direction: column;
        padding-top: 50px;
    }

    .text-item {
        margin: 10px 0;
    }

    .flag-title{
        margin-top: 50px;
    }

    .img-item{
        flex: auto;
        width: 100%;
    }

    .img-item img{
        width: 100%;
        height: auto;
    }

}