粗暴初始化: * {margin:0;padding:0;border:0px none;} 优化初始化: /*css reset code */ /**** 文字大小初始化,使1em=10px *****/body {font-size:62.5%;} /* for IE/Win */html>body {font-size:10px;} /* for everything else */ /*字体边框等初始化*/body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h