body {
    margin: 0;
    padding: 0;
    width: 100%;
}

.banner {
    width: 100%;
    overflow-x: hidden;
}

.banner img {
    width: 100%;
    display: block;
}


.content {
    width: 1200px;
    overflow-x: hidden;
    margin: 0 auto;
}

.content img {
    width: 100%;
}

@media screen and (max-width: 960px) {
    .banner {
        overflow: auto;
    }

    .content {
        width: 100%;
    }
}