css

1, index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>头部导航</title>
    <link rel="stylesheet" href="./style.css">
</head>
<body>
    <div class="header">
        <div class="main">
            <ul class="nav">
                <li><a href="" class="active">首页</a></li>
                <li><a href="">服务</a></li>
                <li><a href="">产品</a></li>
                <li><a href="">活动</a></li>
                <li><a href="">新闻</a></li>
                <li class="right"><a href="">联系</a></li>
            </ul>
        </div>
    </div>
</body>
</html>

2 ,  样式重置文件 reset.css

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}

a{
    text-decoration: none;
}

3, 页面样式文件

@import url(./reset.css);

body{
    min- 1200px;
}
.main{
     1200px;
    margin: 0 auto;
}
.header{
    background: skyblue;
    height: 60px;  /* 定义高度,否则 ul 下方会有白边 */
}

ul.nav>li{
    float: left;
    line-height: 60px;
    text-align: center;
}
ul.nav>li.right{
    float: right;
}
ul.nav>li>a{
    padding: 0 20px;
    /* 块显示才可以撑开 */
    display: inline-block; 
}

a.active{
    font-weight: 600;
}

a:hover{
    background-color: #282828;
    color: skyblue;
}

a{
    color: #282828;
}
原文地址:https://www.cnblogs.com/500m/p/13924588.html