/* 以下是演示代码 */ body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, button, textarea, p, blockquote, th, td { margin: 0; padding: 0; } fieldset, img { border: 0; } /* remember to define focus styles! */ :focus { outline: 0; }

美化 净化 整理 压缩