字体为18px和行间距为2.0 window.onload = function() { var contentParagraphs = document.querySelectorAll('.article-table .content-cell p'); contentParagraphs.forEach(function(p) { p.style.fontSize = '18px'; // 覆盖内联样式 p.style.lineHeight = '2.0'; // 覆盖内联行间距 }); };