html和css扁平化

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html部分:

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Document</title>    <link rel="stylesheet" href="fontawesome-4.2.0/css/font-awesome.min.css">    <link rel="stylesheet" href="css/normalize.css">    <link rel="stylesheet" href="css/main.css"></head><body><div class="main-wrapper">    <header><!--页头开始-->        <nav>            <div class="logo"><a href="">王小窝</a></li></div>                <ul>                    <li><a href="" class="active">首页</a></li>                    <li><a href="">链接3</a></li>                    <li><a href="">链接4</a></li>                </ul>        </nav>        <div id="banner">            <div class="inner">                <h1>王小窝</h1>                <p class="sub-heading">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Veniam numquam in, qui. Ex, tempora velit dolor molestias rerum, ipsum praesentium. Excepturi, commodi. Accusantium praesentium provident, assumenda commodi odit, delectus facilis!              </p>                <button>了解我</button>                <div class="more">                    更多                </div>            </div>        </div>    </header><!--页头结束-->    <div class="content"><!--内容开始-->        <section class="green-section">            <div class="wrapper">                <div>                    <h2>标题</h2>                    <div class="hr"></div>                    <p class="sub-heading">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Assumenda dolorum culpa rerum doloremque beatae, molestiae totam, ea atque rem corporis sed fuga nesciunt, impedit ab et, fugiat ipsa! Id, autem?</p>                </div>                <div class="icon-grop">                <span class="icon">items2</span>                    <span class="icon">items2</span>                    <span class="icon">items3</span>                </div>            </div>        </section>        <section class="gray-section">            <div class="article-preview clearfix">                <div class="text-section">                    <h2>又一个标题</h2>                    <div class="sub-heading">我是副标题</div>                    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quaerat sunt praesentium, magni, architecto numquam nam id quis eaque quidem, adipisci porro hic beatae reprehenderit! Ab eum natus, similique in ut.</p>                </div>                <div class="img-section">                    <img src="img/pic01.jpg" alt="">                </div>            </div>            <div class="article-preview clearfix">                <div class="img-section">                    <img src="img/pic02.jpg" alt="">                </div>                <div class="text-section">                    <h2>又一个标题</h2>                    <div class="sub-heading">我是副标题</div>                    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio nam, rem sed fugiat quia impedit reprehenderit dolorem voluptate aperiam alias harum saepe! Molestiae, repellendus! Magni mollitia neque, dicta similique amet.</p>                </div>            </div>            <div class="article-preview clearfix">                <div class="text-section">                    <h2>又一个标题</h2>                    <div class="sub-heading">我是副标题</div>                    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reiciendis illum blanditiis possimus unde aperiam at praesentium sapiente, nemo iste? Placeat quidem libero similique architecto cupiditate dolorum expedita temporibus harum asperiores.</p>                </div>                <div class="img-section">                    <img src="img/pic03.jpg" alt="">                </div>            </div>        </section>        <section class="purple-section">            <div class="wrapper">                <div class="heading-wrapper">                    <h2>又一个标题</h2>                    <div class="hr"></div>                    <div class="sub-heading">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Magnam tenetur corporis iste sit nesciunt reprehenderit sed neque recusandae ducimus, laudantium, assumenda totam architecto, blanditiis est veritatis aspernatur perferendis nulla qui.</div>                </div>                <div class="card-group clearfix">                    <div class="card">                        <h3>标题</h3>                        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Enim fugiat repellendus, harum aliquam provident aut commodi. Nam, cumque veritatis magni sapiente earum! Excepturi necessitatibus soluta modi. Ut rerum eveniet veniam.</p>                    </div>                    <div class="card">                        <h3>标题</h3>                        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Porro ratione atque, dolores odio, eligendi totam eveniet quo minus fugiat obcaecati, labore delectus? Officiis vitae aliquid sequi culpa, sunt rem odio.</p>                    </div>                    <div class="card">                        <h3>标题</h3>                        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Hic at, vitae veniam labore, quis fugit, sequi enim error tempora, nulla ipsam quae harum praesentium fuga tenetur tempore. Dolore, molestiae, repellat?</p>                    </div>                    <div class="card">                        <h3>标题</h3>                        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quasi deleniti nobis perferendis nostrum. Natus molestiae magnam eligendi totam, aperiam fugiat earum quisquam ratione, tempore expedita aliquam sequi culpa delectus doloremque.</p>                    </div>                    <div class="card">                        <h3>标题</h3>                        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Asperiores ad consectetur voluptatem explicabo rerum perferendis quae alias, dicta tenetur. Quis, eius, voluptates. Incidunt molestiae saepe voluptates odio alias et quam.</p>                    </div>                    <div class="card">                        <h3>标题</h3>                        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Labore harum dolorum at molestiae iure, quisquam officiis suscipit laudantium voluptatum inventore similique, consectetur nobis totam, dicta veritatis tenetur quasi expedita ad.</p>                    </div>                </div>            </div>        </section>    </div><!--内容结束-->    <footer><!--页脚开始-->        <ul class="share-group">            <li>item1</li>            <li>item2</li>            <li>item3</li>            <li>item4</li>            <li>item5</li>        </ul>        <div class="copy">            &copy 王小窝 - 2017        </div>    </footer><!--页脚结束--></div></body></html>


css部分:

.clearfix:after { content: ''; display: block; clear: both; }ul {    margin: 0;}nav {    background-color: transparent;    height: 50px;}a {    text-decoration: none;}header {    background-color: rgba(0,0,0,0.4);}#banner {    background-color: rgba(0,0,0,0.2);    height: 700px;}nav ul {    list-style: none;    margin:0;    float: right;}nav ul li,nav .logo {    display: inline-block;    line-height: 50px;    margin-right: 20px;}nav ul li a {    line-height: inherit;    text-decoration: none;    display: inline-block;    height: inherit;    color: #fff;}nav ul li.logo {    float: left;    padding: 10px;}#banner .inner {    max-width: 300px;    text-align: center;    margin: 0 auto;    position: relative;    top:160px;}#banner .inner h1{    margin: 0;}button {    border: none;    background-color: #333;    color: #eee;    padding: 10px;    border-radius: 5px;}#banner button {    padding: 14px 60px;}#banner .inner .more {    margin-top: 280px;    color: #fff;    font-size: 12px;}.sub-heading{    line-height: 30px;    margin: 30px 0;    /*font-size: 18px;*/}.logo {    font-size: 20px;    font-weight: 700;    letter-spacing: 1px;}.logo a{    color: #fff;}h1 {    padding: 12px;    border-top: 2px solid #fff;    border-bottom: 2px solid #fff;}h2{    font-size: 30px;}h3 {    font-size: 24px;}p {    font-size: 18px;    letter-spacing: 1px;}.hr{    width: 100px;    height: 2px;    margin: 20px auto;}.green-section {    background-color: #089DB0;    text-align: center;    color: #fff;    padding: 100px 0;}.green-section .hr {    background-color: #028e94;    width: 60%;}.green-section .icon-grop .icon{    display: inline-block;width: 80px;    height: 80px;    border: 1px solid #0D6F74;    transform: rotate(45deg);    margin: 20px;}.icon-grop {    margin-top: 60px;}.wrapper {    max-width: 1080px;    margin: 0 auto;}.gray-section {    background-color: #252F34;}.gray-section .img-section{    width: 45%;}.img-section img {    width: 100%}.gray-section .text-section{    width: 55%;}.article-preview > div {    float: left;    font-size: 0;}.article-preview:nth-child(odd){    background-color:rgba(255,25,255,0.05);}.text-section{   position: relative;    top:68px;    left:50px;}.text-section > * {    max-width: 90%;    color: #fff;}.text-section h2    {    margin-bottom: 20px;}.text-section .sub-heading {    font-size: 22px;}.text-section p {    font-size: 18px;    letter-spacing: 1px;}.purple-section {    padding: 80px;    background-color: #3F3965;    color: #fff;}.purple-section .heading-wrapper {    text-align: center;}.purple-section .hr {    background: #373259;    width: 60%;}.card{    float: left;    width: 50%;    min-height: 300px;    padding: 50px;    -webkit-box-sizing: border-box;    -moz-box-sizing: border-box;    box-sizing: border-box;}.card:first-child{    background: rgba(0,0,0,0.04);}.card:nth-child(2){    background: rgba(0,0,0,0.08);}.card:nth-child(3){    background: rgba(0,0,0,0.12);}.card:nth-child(4){    background: rgba(0,0,0,0.16);}.card:nth-child(5){    background: rgba(0,0,0,0.20);}.card:nth-child(6){    background: rgba(0,0,0,0.24);}footer{    background: #333;    color: #fff;    min-height: 200px;    text-align: center;}ul.share-group {    display: block;    width: 1080px;    margin: 0 auto;    padding: 50px;}.share-group li {    display: inline-block;    padding: 10px;}.copy{    padding: 20px;}.main-wrapper {    background: #444 url(../img/banner.jpg);    background-attachment: fixed;    background-repeat: no-repeat;    background-size: cover;    background-position: center;}



浏览器默认设置reset.css,一开始我用的是它,但使用后h1的标题大小失效,有点暴力。用normalize.css还是比较温和的,如果前端了解很深的可以,自己写默认设置。

选择器:nth-child()和nth-of-type()选择器匹配属于其父元素的第n个元素,n可以是数字和关键字或公式。odd和even是比较常见的。

本人初学者,如有错误请勿怪。