Hello,
You have some incorrect css such as:
background-color:url(http://images.yuku.com/image/png/f34...0baefe1fab.png);
You can't use a URL of an image with background-color. To have an image as the background you need to use:
background: url (http etc etc);
When using background-color you have to a color only.
For example:
background-color: #000000;
or
background-color: black;
To change the color of the border of the google search box, you'd need to set the background-color property for CellA to whatever color you'd like that border to be (because google places padding around the search box).
It was defaulting to black because you had that incorrect css code (background-color:url(http://images.yuku.com/image/png/f34...0baefe1fab.png); )
I changed that for you and right now it is defaulting to white because there is no background-color property set for CellA
Hope that helps.