适配移动端基础

方式一：

<meta name="viewport" content="initial-scale=1, user-scalable=0, minimal-ui"/>

文字大小适配 7.5 就是750px的稿纸

<script type="text/javascript">
        document.documentElement.style.fontSize = document.documentElement.clientWidth / 7.5 + 'px';
    </script>

方式二:
创建rem.js引入

(function (doc, win) {
    var docEl = doc.documentElement,
    resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
    recalc = function () {
    var clientWidth = docEl.clientWidth;
    if (!clientWidth) return;
    // 默认设计图为850的情况下1rem=100px；根据自己需求修改
    if(clientWidth>=850){
    docEl.style.fontSize = '100px';
    }else{
    docEl.style.fontSize = 100 * (clientWidth / 850) + 'px';
    }
    };
     
    if (!doc.addEventListener) return;
    win.addEventListener(resizeEvt, recalc, false);
    doc.addEventListener('DOMContentLoaded', recalc, false);
    })(document, window);

css防止字体忽大忽小

@media (min-width: 320px){html{font-size: 37.6471px;} }
@media (min-width: 360px){html{font-size: 42.3529px;} }
@media (min-width: 375px){html{font-size: 44.1176px;} }
@media (min-width: 384px){html{font-size: 45.1765px;} }
@media (min-width: 414px){html{font-size: 48.7059px;} }
@media (min-width: 448px){html{font-size: 52.7059px;} }
@media (min-width: 480px){html{font-size: 56.4706px;} }
@media (min-width: 512px){html{font-size: 60.2353px;} }
@media (min-width: 544px){html{font-size: 64px;} }
@media (min-width: 576px){html{font-size: 67.7647px;} }
@media (min-width: 608px){html{font-size: 71.5294px;} }
@media (min-width: 640px){html{font-size: 75.2941px;} }
@media (min-width: 750px){html{font-size: 88.2353px;} }