Apply CSS to a single node

Hi all,

This works ok to push down my second sidebar but can anyone please tell me how I can I apply this to just the home page?

.region-sidebar-second {
margin-top: 405px !important;
}

This works (but only for the bottom of the page = below the blocks) = http://jurim.info

#node-1 {
border: 9px dotted orange;
}

Can I select the .region-sidebar-second for just the home page with something like this?

#node-1 .region-sidebar-second {
margin-top: 405px !important;
}

Any suggestions please?

Thank you