<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>浮动元素搭配标准流父盒子</title>
    <style>
        .box{
            width: 1200px;
            height: 460px;
            background-color: pink;
            margin: 0 auto;
        }
        .left{
            float: left;
            width: 230px;
            height: 460px;
            background-color: purple;
        }
        .right{
            float: left;
            width: 970px;
            height: 460px;
            background-color: skyblue;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="left">左侧</div>
        <div class="right">右侧</div>
    </div>
</body>
</html>

先创建有个大盒子，然后再在这个盒子里创建两个小盒子，让盒子都左浮动。
浮动案例--常用的网页布局_html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>浮动练习2</title>
</head>
<style>
    /* 清除所有的间距，div是没有间距的，ul是有间距的 */
    *{
        margin: 0;
        padding: 0;
    }
    /* 清除li前面的小圆点 */
    li{
        list-style: none;
    }
    .box{
        width: 1226px;
        height: 285px;
        background-color: pink;
        margin: 0 auto;
    }
    .box li{
        width: 296px;
        height: 285px;
        background-color: purple;
        margin-right: 14px;
        float: left;
    }
    /* 最后一个小li不需要外边距，否则会撑出来 */
    .box .last{
        margin-right: 0;

    }

</style>
<body>
    <ul class="box">
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li class="last">4</li>
    </ul>
</body>
</html>

浮动案例--常用的网页布局_网页布局_02

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>浮动页面布局3</title>
    <style>
        .box{
            width: 1226px;
            height: 615px;
            background-color: pink;
            margin: 0 auto;
        }
        .left{
            width: 234px;
            height: 615px;
            background-color: purple;
            float: left;
        }
        .right{
            width: 992px;
            height: 615px;
            background-color: skyblue;
            float: left;
        }
        .right>div{
            width: 234px;
            height: 300px;
            background-color: pink;
            float: left;
            margin-left: 14px;
            margin-bottom: 14px;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="left">左盒子</div>
        <div class="right">
            <div>1</div>
            <div>2</div>
            <div>3</div>
            <div>4</div>
            <div>5</div>
            <div>6</div>
            <div>7</div>
            <div>8</div>
        </div>
    </div>
</body>
</html>

浮动案例--常用的网页布局_qt_03
常用的网页布局：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>常用的网页布局</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .top{
            height: 50px;
            background-color: gray;
        }
        .banner{
            width: 980px;
            height: 150px;
            background-color: gray;
            margin: 10px auto;
        }
        .box{
            width: 980px;
            margin: 0 auto;
            height: 300px;
            background-color: pink;
        }
        li{
            list-style: none;
        }
        .box li{
            width: 237px;
            height: 300px;
            background-color: gray;
            float: left;
            margin-right: 10px;
        }
        .box .last{
            margin-right: 0;
        }
        .footer{
            height: 200px;
            background-color: gray;
            margin-top: 10px;
        }

    </style>
</head>
<body>
    <div class="top">top</div>
    <div class="banner">banner</div>
    <div class="box">
        <ul>
            <li>1</li>
            <li>2</li>
            <li>3</li>
            <li class="last">4</li>
        </ul>
        
    </div>
    <div class="footer">footer</div>
</body>
</html>

浮动案例--常用的网页布局_qt_04