Попробуйте этот CSS для градиентного фона.
background-image: linear-gradient(top, rgb(240,240,240) 10%, rgb(255,255,255) 58%);
background-image: -o-linear-gradient(top, rgb(240,240,240) 10%, rgb(255,255,255) 58%);
background-image: -moz-linear-gradient(top, rgb(240,240,240) 10%, rgb(255,255,255) 58%);
background-image: -webkit-linear-gradient(top, rgb(240,240,240) 10%, rgb(255,255,255) 58%);
background-image: -ms-linear-gradient(top, rgb(240,240,240) 10%, rgb(255,255,255) 58%);
background-image: -webkit-gradient(
linear,
right top,
right bottom,
color-stop(0.1, rgb(240,240,240)),
color-stop(0.58, rgb(255,255,255))
);