移动端适配-rem练习

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html部分

     <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width,maximum-scale=1.0,minimum-scale=1.0,user-scalable=0 ,initial-scale=1.0" id="view"/>
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>rem适配练习</title>
        <link rel="stylesheet" href="./index.css">
        <script> 
                (function(doc,win,designWidth){
                    var html=doc.documentElement;
                    function refreshRem(){
                        var clientWidth=html.clientWidth;
                        if(clientWidth>=designWidth){
                            html.style.fontSize="100px";//给宽度一个最大值,如果设备的宽度已经超过设计稿的尺寸了,统一按一个值去算。

                        }else{
                            // html.style.fontSize=16*clientWidth/375+'px';//以iphone6字体大小为16px为基准
                            html.style.fontSize=100*(clientWidth/designWidth)+'px';//
                        }
                    };
                    doc.addEventListener('DOMContentLoaded',refreshRem);//dom加载完执行事件
                })(document,window,750);

        </script>
        
        
    </head>
    <body>
        <header id="header">
            <a href="#">北京市</a>
            <div>
                <input type="text" placeholder="输入店铺,商品等">
            </div>
            <a href="#">我的</a>
        </header>
        <section class="banner">
            <a href="#"><img src="images/banner.jpg" alt=""></a>
        </section>
        <nav class="nav">
            <ul>
                <li>
                    <a href="#">
                        <img src="images/circle_01.png" alt="">
                        <span>餐饮住宿</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_02.png" alt="">
                        <span>汽车美容</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_03.png" alt="">
                        <span>生活服务</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_04.png" alt="">
                        <span>休闲娱乐</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_05.png" alt="">
                        <span>教育培训</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_06.png" alt="">
                        <span>家居建材</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_07.png" alt="">
                        <span>酒水饮料</span>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="images/circle_08.png" alt="">
                        <span>婚纱婚庆</span>
                    </a>
                </li>
            </ul>
        </nav>

        <section id="ad1" class="clearfix">
            <a href="#"><img src="images/img_01.jpg" alt=""></a>
            <a href="#"><img src="images/img_02.jpg" alt=""></a>
            <a href="#"><img src="images/img_03.jpg" alt=""></a>
        </section>
        <section id="ad2">
                <a href="#"><img src="images/img_04.jpg" alt=""></a>
        </section>

        <section id="list">
            <h3><span>综合推荐</span></h3>
            <article>
                <a href="#">
                    <div class="img">
                        <img src="images/img_05.jpg" alt="">
                    </div>
                    <div class="text">
                        <h4>悠悠奶茶</h4>
                        <p>销售各类散茶、品牌茶叶、茶具。全品一展示茶叶茶具批牌茶叶、茶具。全品一展示茶叶茶具发商</p>
                        <div>
                            剩余领取<strong>0</strong><span class="discount">8.0</span>
                            <span class="red">幸运红包</span>
                        </div>
                    </div>
                </a>
            </article>
            <article>
                    <a href="#">
                        <div class="img">
                            <img src="images/img_05.jpg" alt="">
                        </div>
                        <div class="text">
                            <h4>悠悠奶茶</h4>
                            <p>销售各类散茶、品牌茶叶、茶具。全品一展示茶叶茶具批牌茶叶、茶具。全品一展示茶叶茶具发商</p>
                            <div>
                                剩余领取<strong>0</strong><span class="discount">8.0</span>
                                <span class="red">幸运红包</span>
                            </div>
                        </div>
                    </a>
            </article>
            <article>
                    <a href="#">
                        <div class="img">
                            <img src="images/img_05.jpg" alt="">
                        </div>
                        <div class="text">
                            <h4>悠悠奶茶</h4>
                            <p>销售各类散茶、品牌茶叶、茶具。全品一展示茶叶茶具批牌茶叶、茶具。全品一展示茶叶茶具发商</p>
                            <div>
                                剩余领取<strong>0</strong><span class="discount">8.0</span>
                                <span class="red">幸运红包</span>
                            </div>
                        </div>
                    </a>
            </article>
            <article>
                    <a href="#">
                        <div class="img">
                            <img src="images/img_05.jpg" alt="">
                        </div>
                        <div class="text">
                            <h4>悠悠奶茶</h4>
                            <p>销售各类散茶、品牌茶叶、茶具。全品一展示茶叶茶具批牌茶叶、茶具。全品一展示茶叶茶具发商</p>
                            <div>
                                剩余领取<strong>0</strong><span class="discount">8.0</span>
                                <span class="red">幸运红包</span>
                            </div>
                        </div>
                    </a>
            </article>
        </section>
    </body>
    </html> 

    

css部分:

 
/* 样式重置 */
body {
	font-family: helvetica;
	margin: 0 auto;

	/* max-width: 750px; */
}
@media screen and (min-width: 750px){
	body{
		width: 750px;
	}
}

body * {
	-webkit-user-select: none;
	-webkit-touch-callout: none;
	-webkit-text-size-adjust: 100%;
}
a,button,input {
	-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
button,input {
	-webkit-appearance: none;
	border-radius: 0;
}
a {
	text-decoration: none;
}
input {
	outline: none;
	vertical-align: middle;
	padding: 0;
}
ul{
	margin: 0;
	padding: 0;
	list-style: none;
}
img{
	vertical-align: middle;
}
h3,h4,p{
	margin: 0;
}
.left {
	float: left;
}
.right {
	float: right;
}
.clearfix:after {
	content: '';
	display: block;
	clear: both;
}

*{
    margin:0;
    padding:0;
    list-style: none;
    text-decoration: none;
}
/* heaader */
#header{
    display: flex;
    align-items: center;
    height:50px;
    line-height: 50px;
    background-color:#d22147;
    font-size:14px;
    color:#fff;
}
#header a{
    color:#fff;
   
    
}

#header a:nth-of-type(1){
    text-align: center;
    flex:0 0 80px;
}

#header a:nth-of-type(1):after{
   content: "";
   display: inline-block;
   width: 12.5px;
   height:7px;
   background: url(images/ico_01.png) no-repeat center/cover ;
   /* background-size: cover; */
   margin-left: 4px;
}
#header div{
    flex:1;
}
#header div input{
    text-indent: 34px;
    /* padding-left:34px; */
    width:100%;
    height:32px;
    border-radius: 8px;
    border:none;
    color:#e2c2c9;
    background: #ae3e56 url(images/ico_02.png) no-repeat 8px 5px/21px 22px;
}

#header a:nth-of-type(2){
    text-align: center;
    flex:0 0 69px;
}
#header a:nth-of-type(2):before{
    content: "";
    display: inline-block;
    width: 13px;
    height:13px;
    background: url(images/ico_03.png) no-repeat center/cover ;
    /* background-size: cover; */
    margin-right: 5px;
}

/* banner */
.banner{
    text-align: center;
}
.banner a img{
    width:7.5rem;
    /* width:100%; */

} 
.nav {
    font-size: 0px;
}

.nav ul{
    background-color:#f2f0f0;
}
.nav li{
    width:25%;
    display:inline-block;
    text-align: center;
    margin:0.2rem 0;
}

nav li a{
    font-size:0.28rem;
    color:#525252;
}
nav li img{
    display:block;
    margin:0 auto 0.1rem auto;
    width:0.75rem;
    height:0.75rem;
}
/* ad1 */
#ad1 a{
   
    float:left;
    /* display: inline-block; */

}
#ad1 a img{
    width:2.5rem;
    height:2.5rem;
}
/* ad2 */
#ad2{
    background-color: #f2f0f0;
    padding: 0.3rem 0;
}
#ad2 img{
    width:100%;
}

#list h3{
    font-size: 16px;
    color:#131313;
    height:40px;
    line-height: 40px;
    padding-left:10px;
    font-weight:normal;
    /* border-bottom:1px solid #d2d2d4; */
    position: relative;

}

/* 解决1px的问题 */
@media screen and (-webkit-min-device-pixel-ratio: 2) {
    #list h3:after {
        content: " ";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 1px;
        border-bottom: 1px solid #c1c0c5;
        color: #c1c0c5;
        transform-origin: 0 0;
        transform: scaleY(0.5);
    }
}
#list h3::before{
    content:"";
    display:inline-block;
    width:0.08rem;
    height:0.32rem;
    background-color:#cc0530;
    border-radius:0.05rem;
    margin-right:0.2rem;
    vertical-align: middle;

}
#list h3 span{
    vertical-align: middle;
    
}
#list article{
    position: relative;
    /* border-bottom:1px solid #c1c0c5; */
    
}
@media screen and (-webkit-min-device-pixel-ratio: 2) {
    #list article:after {
        content: " ";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 1px;
        border-bottom: 1px solid #c1c0c5;
        color: #c1c0c5;
        transform-origin: 0 0;
        transform: scaleY(0.5);
    }
}
#list article a{
    padding:0.2rem;
    display:flex;

}
#list article .img{
    flex :0 0 auto;
    padding-right:0.3rem;
}
#list article .img img{
    width:2.14rem;
    height:1.94rem;

} 
#list article .text{
    flex:2 2 auto;
}
#list article .text h4{
    font-size: 0.28rem;
    color:#181818;
    line-height: 0.6rem;
    margin-bottom:0.05rem;
}
#list article .text p{
    font-size: 0.24rem;
    color:#979797;
    line-height: 0.36rem;
    margin-bottom:0.19rem;
     /*...表示  */
    display:-webkit-box;
    -webkit-line-clamp:2;/*设置文本显示行数*/
    -webkit-box-orient:vertical;
    overflow: hidden;
}
#list article .text div{
    height:0.34rem;
    font-size: 0.24rem;
    line-height: 0.34rem;
    color:#525252;

}
#list article .text div strong{
    color:#cc0530;
    margin:0 0.09rem;

}
.text .discount{
    display:inline-block;
    width:0.84rem;
    height:0.33rem;
    color:#fff;
    background:url(images/ico_04.gif) no-repeat ;
    background-size: cover;
    padding-left:0.15rem;
    margin-left: 0.15rem;
    box-sizing: border-box;


}
.text  .red{
    float:right;
    background:url(images/ico_05.png) no-repeat left center ;
    background-size:0.24rem 0.22rem;
    padding-left:0.28rem; 
}
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