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    background-image:url('https://www.cntech.co.uk/assets/images/m/home-5ktn82nj4rxvzds.jpg');
    background-repeat:no-repeat;
    background-position:center center;
    width:100%;
    background-size: cover;
    height:580px;
}
@media screen and (min-width:700px){
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        background-image:url('https://www.cntech.co.uk/assets/images/1/home-8jyzvfxfyfsyb0y.jpg');
        height:465px;
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}
@media screen and (min-width:980px){
    #resImage_273 {
        background-image:url('https://www.cntech.co.uk/assets/images/8/home-hway8swnnj5edqy.jpg');
        height:465px;
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}
@media screen and (min-width:1400px){
    #resImage_273 {
        background-image:url('https://www.cntech.co.uk/assets/images/8/home-hway8swnnj5edqy.jpg');
        height:465px;
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}