因为项目中有一个font-weight:400,让font-weight:bold失效了。
解决方案：
在common.css里加上 font-weight: revert!important; //意思就是font-weight还原
a, abbr, acronym, address, applet, article, aside, audio, b, big, blockquote, body, canvas, caption, center, cite, code, dd, del, details, dfn, div, dl, dt, em, embed, fieldset, figcaption, figure, footer, form, h1, h2, h3, h4, h5, h6, header, html, i, iframe, img, input, ins, kbd, label, legend, li, mark, menu, nav, object, ol, output, p, pre, q, ruby, s, samp, section, small, span, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, time, tr, tt, u, ul, var, video{
font-weight: revert!important;
}
其实就是把font-weight的属性都去掉了