<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>第2章 用HTML+CSS实现最简单的网页布局效果：一列布局</title> <style> body{ margin: 0; padding: 0; } .top{ height: 100px; background-color: blue; } .main{ width: 800px; height: 300px; background-color: #ccc; margin: auto; } .foot{ height: 100px; width: 800px; background-color: #900; margin: 0 auto; } </style> </head> <body> <div class="top"></div> <div class="main"></div> <div class="foot"></div> </body> </html>
