1. 三种布局方式
1.1 标准流
1.2 浮动的使用
1.3 简述浮动
1.3.1 浮动三大特性
<style>.out {border: 1px red solid;width: 1000px;height: 500px;}.one {background-color: aquamarine;width: 200px;height: 100px;}.two {background-color: blueviolet;width: 200px;height: 100px;}.add {width: 300px;height: 200px;background-color: blue;}</style>
</head>
<body><div class="out"><div class="one">1111</div><div class="two">2222</div><div class="add">AAAAA</div></div>
</body>
1.3.2 浮动的常规使用
1.4 浮动案例
案例 1 ：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>* {padding: 0;margin: 0;}.out {border: 1px red solid;width: 1000px;height: 500px;margin: 10px auto;background-color: bisque;}.left {background-color: aquamarine;width: 300px;height: 500px;float: left;}.right {background-color: blueviolet;width: 700px;height: 500px;float: right;}</style>
</head>
<body><div class="out"><div class="left"></div><div class="right"></div></div>
</body>
</html>
案例 2 ：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>* {margin: 0;padding: 0;}.out {width: 880px;height: 170px;margin: 10px auto;background-color: aquamarine;}.one,.two,.three,.four {height: 150px;width: 200px;margin: 10px ;}.one {background-color: burlywood;float: left;}.two {background-color: cadetblue;float: left;}.three {background-color: chocolate;float: left;}.four {background-color: darkorange;float: left;}</style>
</head>
<body><div class="out"><div class="one">甲</div><div class="two">乙</div><div class="three">丙</div><div class="four">丁</div></div>
</body>
</html>
第二种方式：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>/* 在实际生活中，布局的宽高等都是有精确要求的 */* {margin: 0;padding: 0;}div {border: 1px red solid;width: 850px;height: 300px;margin: 10px auto;}.test {list-style: none;}/* 必须对 li 设置宽高，背景颜色等 */.test li {float: left;width: 150px;height: 200px;background-color: bisque;margin: 10px;}</style>
</head>
<body><div><ul class="test"><li>111</li><li>222</li><li>333</li><li>444</li><li>555</li></ul></div>
</body>
</html>
案例 3 ：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>* {margin: 0;padding: 0;}.out {width: 1200px;height: 600px;margin: 10px auto;background-color: aquamarine;}.left {width: 350px;height: 600px;background-color: bisque;float: left;}.right {width: 850px;height: 00px;background-color: blueviolet;float: right;}.right ul {list-style: none;}.right ul li {float: left;width: 190px;height: 280px;background-color: brown;margin: 10px;}</style>
</head>
<body><div class="out"><div class="left"></div><div class="right"><ul><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li></ul></div></div>
</body>
</html>
案例 4 ：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>* {margin: 0;padding: 0;}.top {height: 100px;background-color: aquamarine;}.banner {margin: 10px auto;height: 100px;width: 1000px;background-color: bisque;}.up {width: 1000px;margin: 10px auto;background-color: burlywood;}.up ul {list-style: none;}.up ul li {width: 230px;height: 100px;float: left;margin: 10px 10px;background-color: blueviolet;}.down {width: 1000px;margin: 10px auto;background-color: burlywood;}.down ul {list-style: none;}.down ul li {width: 230px;height: 300px;float: left;margin: 10px 10px;background-color:burlywood;}.footer {height: 300px;background-color:cornflowerblue;margin-top: 460px;}</style>
</head>
<body><div class="top"></div><div class="banner"></div><div class="up"><ul><li></li><li></li><li></li><li></li></ul></div><div class="down"><ul><li></li><li></li><li></li><li></li></ul></div><div class="footer"></div>
</body>
</html>
1.5 案例总结
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>* {padding: 0;margin: 0;}div {width: 200px;height: 200px;margin-top: 10px;margin-left: 10px;}.one {background-color: aquamarine;}.two {background-color: bisque;}.three {background-color: blueviolet;}</style>
</head>
<body><div class="one">111</div><div class="two">222</div><div class="three">333</div>
</body>
</html>
