样式重置 移动端适配

css默认样式重置

 1 @charset "utf-8";
 2 img {border:none; display:block;}
 3 em,i{ font-style:normal;}
 4 body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, textarea, p, blockquote, th, td, font { padding: 0; margin: 0; font-family:"微软雅黑"; }
 5 table { border-collapse: collapse; border-spacing: 0;}
 6 h1, h2, h3, h4, h5, h6 { font-weight: normal; font-size: 100%; }
 7 ol, ul, li, dl, dt, dd { list-style: none; }
 8 input, button, textarea, checkbox, select, radio, form { vertical-align: top; }
 9 a{ color: #000; text-decoration: none; }
10 a:link, a:visited { text-decoration: none; }
11 a:hover{color:#cd0200;text-decoration:underline}
12 .hongred{ color:#f00;}
13 .blank { height: 0.5rem; font-size: 0; line-height: 0; clear: both; overflow: hidden; }
14 input[type="submit"],  input[type="reset"],  input[type="button"],  button {
15     -webkit-appearance: none;
16 }

移动端适配  rem.js

/**
 * ydui 可伸缩布局方案
 * rem计算方式：设计图尺寸px / 100 = 实际rem  例: 100px = 1rem
 */
!function (window) {

    /* 设计图文档宽度 */
    var docwidth = 750;

    var doc = window.document,
        docel = doc.documentelement,
        resizeevt = 'orientationchange' in window ? 'orientationchange' : 'resize';

    var recalc = (function refreshrem () {
        var clientwidth = docel.getboundingclientrect().width;

        /* 8.55：小于320px不再缩小，11.2：大于420px不再放大 */
        docel.style.fontsize = math.max(math.min(20 * (clientwidth / docwidth), 11.2), 8.55) * 5 + 'px';

        return refreshrem;
    })();

    /* 添加倍屏标识，安卓为1 */
    docel.setattribute('data-dpr', window.navigator.appversion.match(/iphone/gi) ? window.devicepixelratio : 1);

    if (/ip(hone|od|ad)/.test(window.navigator.useragent)) {
        /* 添加ios标识 */
        doc.documentelement.classlist.add('ios');
        /* ios8以上给html添加hairline样式，以便特殊处理 */
        if (parseint(window.navigator.appversion.match(/os (\d+)_(\d+)_?(\d+)?/)[1], 10) >= 8)
            doc.documentelement.classlist.add('hairline');
    }

    if (!doc.addeventlistener) return;
    window.addeventlistener(resizeevt, recalc, false);
    doc.addeventlistener('domcontentloaded', recalc, false);

}(window);

　　附：一个比较全面的css样式重置