<!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>Document</title> <style> /* 浮动的标签 顶对齐 */ /* 浮动: 在一行排列, 宽高生效 -- 浮动后的标签具备行内块特点 */ .one { width: 100px; height: 100px; background-color: pink; float: left; margin-top: 50px; } .two { width: 200px; height: 200px; background-color: skyblue; float: left; /* 因为有浮动, 不能生效 - 盒子无法水平居中 */ margin: 0 auto; } .three { width: 300px; height: 300px; background-color: orange; } </style> </head> <body> <div class="one">one</div> <div class="two">two</div> <div class="three">three</div> </body> </html>
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