ch01.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>仿天猫</title>
<meta name="viewport" content="maximum-scale=1.0,minimum-scale=1.0,user-scalable=no,width=device-width,initial-scale=1.0"/>
<link rel="stylesheet" type="text/css" href="./buy.css"/>
</head>
<body>
<header id="header" class="home">
<figure class="fl ff">
<img src="" alt="" class="flp">
<figcaption>分 类</figcaption>
</figure>
<input type="text" class="ss" name="ss"