body {font-family:sans-serif
}
.csDiv{width:100%;}img{float:left;}

@media(max-width:620px) {
    .csDiv {
        width: 100%
    }

    img {
        width: 100%;
        height: auto;
    }
}
h2 {
    color: #6495ed
}

h3 {
    color: #008b8b
}

h4 {
    color: #8a2be2
}