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  • 通过js 来计算根元素px 实现响应式

    <!DOCTYPE html>
    <html lang="zh-CN">
    <head>
        <meta charset="UTF-8">
        <title>单屏布局</title>
        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
        <meta name="keywords" content="123">
        <meta name="description" content="321">
        <meta name="robots" content="all">
        <meta name="baiduspider" content="all">
        <meta name="googlebot" content="all">
        <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
        <meta name="renderer" content="webkit">
        <meta name="format-detection" content="telephone=no" />
        <script>
            /* 根据窗口宽度自动计算html基准字体大小,用于移动端弹性布局 */
            (function (){
                var docEl = document.documentElement,
                    docBody = document.body,
                    baseFontSize = 100,
                    pageMaxWidth = 750,
                    rootHtml = document.getElementsByTagName('html')[0],
                    resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
                    recalc = function () {
                        var clientWidth = Math.min(
                            docEl.clientWidth || docBody.clientWidth,
                            window.innerWidth,
                            pageMaxWidth
                        );
                        
                        var resFont = baseFontSize * (clientWidth / pageMaxWidth);
                        
                        rootHtml.style.fontSize = resFont + 'px';
                    };
                if (!window.addEventListener) return;
     
                window.addEventListener(resizeEvt, recalc, false);
     
                recalc();
            })();
        </script>
        <style type="text/css">
        *{
            margin: 0px;
            padding: 0px;
        }
     
        body{
            background-color: #000;
            color: #fff;
            font-size: 0.32rem;
        }
     
        a{
            text-decoration: none;
        }
     
        .full-screen{
            position: fixed;
            left: 0px;
            right: 0px;
            top: 0px;
            bottom: 0px;
            z-index: 1;
        }
     
        .wrapper{
            position: absolute;
            text-align: center;
        }
     
        .wrapper-top,.wrapper-middle,.wrapper-bottom{
            position: absolute;
            left: 0px;
             100%;
            font-size: 0.16rem;
        }
     
        .wrapper-middle{
            top: 50%;
            transform: translateY(-50%);
            font-size: 0px;
        }
     
        .wrapper-top{
            position: absolute;
            left: 0px;
             100%;
            bottom: 58%;
            z-index: 3;
        }
     
        .wrapper-bottom{
            position: absolute;
            left: 0px;
             100%;
            top: 58%;
            bottom: 0px;
            z-index: 2;
        }
     
        .wrapper-middle .dotted{
             0.24rem;
            height: 0.24rem;
            border: 0.04rem solid #ff7019;
            -webkit-border-radius: 50%;
            -moz-border-radius: 50%;
            border-radius: 50%;
            font-size: 0px;
            margin-right: 0.16rem;
            display: inline-block;
        }
        .wrapper-middle .dotted:last-child{
            margin-right: 0px;
        }
     
        .wrapper-top .wait-wrapper{
            font-size: 1.5em;
        }
     
        .wrapper-top .title {
            letter-spacing: 1px;
        }
     
        .wrapper-top .wait-times {
            margin-top: 0.32rem;
            text-align: center;
        }
     
        .wrapper-top .wait-times>li {
            display: inline-block;
            padding: 0.3rem 0.24rem 0;
            position: relative;
             17%;
        }
     
        .wrapper-top .wait-times p.units {
            position: absolute;
            top: 0px;
            left: 50%;
            -webkit-transform: translateX(-50%);
            -moz-transform: translateX(-50%);
            -o-transform: translateX(-50%);
            transform: translateX(-50%);
        }
        @font-face {
          font-family: 'Condensed';
          src: url("//qidian.gtimg.com/activity/2018/20180316/fonts/Condensed-21c5e01496.woff2") format("woff2"), url("//qidian.gtimg.com/activity/2018/20180316/fonts/Condensed-6d6551d03e.woff") format("woff"), url("//qidian.gtimg.com/activity/2018/20180316/fonts/Condensed-69450615f7.ttf") format("truetype"), url("//qidian.gtimg.com/activity/2018/20180316/fonts/Condensed-4c6dea1ea0.svg") format("svg");
          font-weight: normal;
          font-style: normal; 
        }
     
        .wrapper-top .wait-times .gradient-time {
            font-size: 1rem;
            font-weight: bold;
            line-height: 1.1;
            font-family: "Condensed";
            padding-top: 0.2rem;
        }
        .wrapper-top .title1{
            padding: 0 1%;
            font-size: 0.32rem;
            margin-bottom: 0.2rem;
        }
     
        @font-face {
          font-family: 'main3161';
          src: url("//qidian.gtimg.com/activity/2018/20180316/fonts/main3161-3fd57dd20d.woff2") format("woff2"), url("//qidian.gtimg.com/activity/2018/20180316/fonts/main3161-b91191f345.woff") format("woff"), url("//qidian.gtimg.com/activity/2018/20180316/fonts/main3161.ttf") format("truetype"), url("//qidian.gtimg.com/activity/2018/20180316/fonts/main3161-ae9661d96e.svg") format("svg");
          font-weight: normal;
          font-style: normal; }
     
        .wrapper-top .descs{
            padding: 0 1%;
            font-size: 1.12rem;
            margin-bottom: 0.1rem;
            line-height: 1.2;
            font-family: 'main3161';
        }
        
        .wrapper-bottom{
            font-size: 0.24rem;
            line-height: 2;
        }
     
        .wrapper-bottom .title{
            color: #ff7019;
            font-size: 0.32rem;
        }
     
        .wrapper-bottom .desc{
     
        }
     
        .wrapper-bottom .answer-btn{
            margin: 0.32rem auto;
             3.6rem;
            line-height: 0.88rem;
            background-color: #ff7019;
            color: #fff;
            display: block;
            font-size: 0.32rem;
            letter-spacing: 2px;
            font-family: 'main316';
        }
     
        .wrapper-bottom .array-btn{
            color: #ff7019;
            border-bottom: 1px solid currentColor;
            font-size: 0.32rem;
        }
     
        .wrapper-bottom .design{
            position: absolute;
            left: 50%;
            -webkit-transform: translateX(-50%);
            -moz-transform: translateX(-50%);
            -o-transform: translateX(-50%);
            transform: translateX(-50%);
            bottom: 0.48rem;
            opacity: 0.25;
            white-space: nowrap;
        }
        
     
        </style>
    </head>
    <body class = "full-screen">
    <div class="wrapper full-screen">
        <div class = "wrapper-top">
            <div class = "title1">第三届 | 2018.03.16</div>
            <div class = "descs">
                再出发
            </div>
            <div class="wait-wrapper">
                <h3 class="title">距离开始还有</h3>
                <ul class="wait-times"><li>
                    <p class="units">DAYS</p>
                    <p class="gradient-time">01</p>
                </li><li>
                    <p class="units">HOURS</p>
                    <p class="gradient-time">02</p>
                </li><li>
                    <p class="units">MINUTES</p>
                    <p class="gradient-time">44</p>
                </li><li>
                    <p class="units">SECONDS</p>
                    <p class="gradient-time">00</p>
                </li></ul>
            </div>
        </div>
        <div class = "wrapper-middle"><span class = "dotted"></span><span class = "dotted"></span><span class = "dotted"></span></div>
        <div class = "wrapper-bottom">
            <p class="title">【请大声说出】你心目中的“进取”?</p>
            <p class="desc">参与互动留言,随机赠送专属定制礼品!<br>更有机会现场上墙,“对话”CEO~</p>
            <a class="answer-btn" href="javascript:;" title="我来回答">我来回答</a>
            <a class="array-btn" href="javascript:;" title="查看会议日程">查看会议日程</a>
            <p class="design">- DESIGN BY YUX -</p>
        </div>
    </div>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/objectjj/p/11475758.html
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