0、初始化样式

初始化样式，非原创，仅供个人学习参考<link href="base.css">

/* CSS Document */html, body, div, span, object, iframe,h1, h2,h3, h4, h5, h6, p, blockquote, pre,abbr, address, cite, code,del, dfn,em, img, ins,kbd, q, samp,small, strong, sub, sup, var,b, i,dl, dt, dd,ol, ul, li,fieldset, form, label, legend,table, caption, tbody,tfoot,thead,tr, th, td,article, aside, canvas, details, figcaption,figure, footer, header, hgroup, menu, nav, section, summary,time, mark,audio, video {    margin:0;    padding:0;    border:0;    outline:0;    font-size:100%;    vertical-align:baseline;    background:transparent;    outline-style:none;/*FF*/}

body {    line-height:1;}

a{    margin:0;    padding:0;    border:0;    font-size:100%;    vertical-align:baseline;    background:transparent;

}a:hover,a:focus{    text-decoration:none;    bblr:expression(this.onFocus=this.blur());/*IE*/    outline-style:none;/*FF*/}table {    border-collapse:collapse;    border-spacing:0;}

input, select {    vertical-align:middle;}

/*css为clearfix，清除浮动*/.clearfix::before,.clearfix::after{    content: "";    height: 0;    line-height: 0;    display: block;    visibility: hidden;    clear: both;}.clearfix:after{clear:both;}.clearfix{    *zoom:1;/*IE/7/6*/}

原文地址：https://www.cnblogs.com/chwen1014/p/8777766.html