.container {
    background: #e4eff3;
}

.yugaoBox {
    width: 1000px;
    margin: 0 auto 30px;
}

.yugaoBox img {
    width: 100%;
}

@media screen and (min-width:320px) and (max-width: 768px) {
    .container {
        width: 1000px;
        min-width: 1000px;
    }
}