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@@ -0,0 +1,94 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <meta charset="UTF-8" />
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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+ <title>Document</title>
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+ <style>
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+ * {
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+ margin: 0;
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+ padding: 0;
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+ list-style: none;
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+ text-decoration: none;
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+ box-sizing: border-box;
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+ }
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+ .box {
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+ /* width: 1500px; */
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+ }
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+ .header {
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+ width: 100%;
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+ height: 75px;
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+ background: #00f;
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+ }
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+ .header .nav {
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+ width: 1200px;
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+ height: 100%;
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+ background: #ff0;
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+ /* 已知宽高的盒子水平居中
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+ auto 自适应
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+ */
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+ margin: 0 auto;
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+ }
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+ .header .nav ul li {
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+ float: left;
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+ }
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+ .main div {
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+ width: 200px;
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+ height: 200px;
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+ /* float: left; */
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+ }
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+ .main .one {
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+ background: #f00;
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+ }
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+ .main .two {
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+ background: #0ff;
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+ float: left;
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+ }
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+ .main .three {
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+ width: 400px;
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+ height: 400px;
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+ float: left;
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+ background: #f0f;
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+ }
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+ .main .four {
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+ height: 300px;
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+ background: #0f0;
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+ }
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+ </style>
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+ </head>
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+ <body>
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+ <!--
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+ 为什么要语义化？
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+ 1.高效、便携开发
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+ 2.搜索引擎寻找信息
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+
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+ 想让标签在一行展示？
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+ 浮动：让元素在一行展示
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+ float:left/right/none
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+ 特点：脱离文档流 不占位
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+ -->
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+ <div class="box">
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+ <!-- 头部样式 -->
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+ <div class="header">
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+ <div class="nav">
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+ <ul>
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+ <li><a href="">内容1</a></li>
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+ <li><a href="">内容2</a></li>
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+ <li><a href="">内容3</a></li>
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+ <li><a href="">内容4</a></li>
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+ <li><a href="">内容5</a></li>
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+ </ul>
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+ </div>
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+ </div>
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+ <!-- 主体样式 -->
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+ <div class="main">
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+ <div class="one"></div>
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+ <div class="two"></div>
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+ <div class="three"></div>
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+ <div class="four"></div>
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+ </div>
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+ <!-- 尾部样式 -->
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+ <div class="footer"></div>
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+ </div>
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+ </body>
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+</html>
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