如何居中对齐wordpress网站主页的标题？

I have a wordpress site , whose home page is a static page. I want to align the page heading centrally and make the font 48. I went to style.css and changed to :

.post-title {
    font-family: Oswald,arial,Georgia, serif;
    margin-bottom:10px;
    font-size: 48px;
    text-align:center;
}

As I changed this, heading of all the posts and pages changed to this new setting. How should I change the CSS, so that only the heading of static page will change?

Thanks in advance friends. (I am not a full time programmer, but I can understand code and do small customization if required.)

EDIT : To clarify, I want to make the changes only on the heading of static page not on all pages and posts. Currently it happens on all pages and posts.

Setting the margin for left/right to auto should do the trick:

.post-title {
    font-family: Oswald,arial,Georgia, serif;
    margin: 10px auto;
    font-size: 48px;
    text-align:center;
}

This will help put,

<div align="center">
// yr code here
</div>

this will make sure your content remains center on any resolution.

hope that helps

Look deeper into the HTML code, see if the heading is wrapped in a div with another class. To only set the heading you'll probably need to be a bit more specific when targeting it.

.header . heading > .post-title {
   font-family: Oswald,arial,Georgia, serif;
   margin: 10px auto;
   font-size: 48px;
   text-align:center;
}

Ofcoure, if .post-title already has the correct font-family, you won't need to repeat it again for the more specific CSS lines.

.post-title {
   font-family: Oswald,arial,Georgia, serif;
   font-size: 16px;
}

.header . heading > .post-title {
   font-family: Oswald,arial,Georgia, serif;
   font-size: 48px;
   text-align:center;
   margin: 10px auto;
}