例如：小米官网综合案例（一个标准流四个浮动，盒子与盒子之间的距离通过margin来控制。）
<!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2</title> <style> * { margin: 0; padding: 0; } li { list-style: none; } .box { width: 1226px; height: 285px; background-color: pink; margin: 0 auto; } .box li { width: 296px; height: 285px; background-color: purple; float: left; margin-right: 14px; } /* 这里必须写 .box .last 要注意权重的问题 20 */ .box .last { margin-right: 0; } </style> </head> <body> <ul class="box"> <li>1</li> <li>2</li> <li>3</li> <li class="last">4</li> </ul> </body> </html>
例题：手机模块，上侧两类的结合体
注意：网页布局第二准则
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>手机模型</title> <style> .box { width: 1226px; height: 615px; background-color: pink; margin: 0 auto; } .left { float: left; width: 234px; height: 615px; background-color: purple; } .right { float: left; width: 992px; height: 615px; background-color: skyblue; } /* 表示的是只找right的儿子div，找最近的 */ .right>div { float: left; width: 234px; height: 300px; background-color: pink; 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>
5. 网页布局
做一个基本的网页布局（首先清除内外边距，取消系统自带的默认边距）
<!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>常见网页布局</title> <style> * { margin: 0; padding: 0; } li { list-style: none; } .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; } .box li { float: left; width: 237px; height: 300px; background-color: gray; margin-right: 10px; } .box .last { margin-right: 0; } /* 只要是通栏的盒子(和浏览器一样宽) 不需要指定宽度 */ .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>
浮动布局注意点：
