这是有效的CSS吗？为什么或者为什么不？

Question

.9-bucks {
    font-size:  60px;
}

当我将我的应用程序推送到Heroku时,这是我得到的错误:

ActionView::Template::Error (Invalid CSS after ".": expected class name, was "9-bucks {"
2012-06-07T11:42:45+00:00 app[web.1]:   (in /app/app/assets/stylesheets/application.css)):

Answer 1

CSS选择器名称(ID或类名称)不能以数字开头... http://css-tricks.com/ids-cannot-start-with-a-number/

尝试替换 .nine-bucks { }