如何调整olark的边距

Olark是一款比较方便的Live chat软件，手机上面也能实时在线支持。现在的问题是聊天的浮动窗口在底部右边，挡住了一件返回顶部的这个按键。 因为免费版本无法设置窗口靠右，所以想请问大神@Hunk ，有没有办法在css里面调整窗口的边距，这样只要距离右边稍微远一些，让一件返回顶部的这个按钮显示出来就行。
下面是olark提供的添加代码，已经放入网页当中。
{{{
<!-- begin olark code -->
<script data-cfasync="false" type='text/javascript'>/*<![CDATA[*/window.olark||(function(c){var f=window,d=document,l=f.location.protocol=="https:"?"https:":"http:",z=c.name,r="load";var nt=function(){
f[z]=function(){
(a.s=a.s||[]).push(arguments)};var a=f[z]._={
},q=c.methods.length;while(q--){(function(n){f[z][n]=function(){
f[z]("call",n,arguments)}})(c.methods[q])}a.l=c.loader;a.i=nt;a.p={
0:+new Date};a.P=function(u){
a.p[u]=new Date-a.p[0]};function s(){
a.P(r);f[z](r)}f.addEventListener?f.addEventListener(r,s,false):f.attachEvent("on"+r,s);var ld=function(){function p(hd){
hd="head";return["<",hd,"></",hd,"><",i,' onl' + 'oad="var d=',g,";d.getElementsByTagName('head')[0].",j,"(d.",h,"('script')).",k,"='",l,"//",a.l,"'",'"',"></",i,">"].join("")}var i="body",m=d[i];if(!m){
return setTimeout(ld,100)}a.P(1);var j="appendChild",h="createElement",k="src",n=d[h]("div"),v=n[j](d[h](z)),b=d[h]("iframe"),g="document",e="domain",o;n.style.display="none";m.insertBefore(n,m.firstChild).id=z;b.frameBorder="0";b.id=z+"-loader";if(/MSIE[ ]+6/.test(navigator.userAgent)){
b.src="javascript:false"}b.allowTransparency="true";v[j](b);try{
b.contentWindow[g].open()}catch(w){
c[e]=d[e];o="javascript:var d="+g+".open();d.domain='"+d.domain+"';";b[k]=o+"void(0);"}try{
var t=b.contentWindow[g];t.write(p());t.close()}catch(x){
b[k]=o+'d.write("'+p().replace(/"/g,String.fromCharCode(92)+'"')+'");d.close();'}a.P(2)};ld()};nt()})({
loader: "static.olark.com/jsclient/loader0.js",name:"olark",methods:["configure","extend","declare","identify"]});
/* custom configuration goes here (www.olark.com/documentation) */
olark.identify('6365-627-10-1782');/*]]>*/</script><noscript><a href="https://www.olark.com/site/6365-627-10-1782/contact" title="Contact us" target="_blank">Questions? Feedback?</a> powered by <a href="http://www.olark.com?welcome" title="Olark live chat software">Olark live chat software</a></noscript>
<!-- end olark code -->
}}}