源码获取魏：RACXDX 支持要求定制文档编写
目录
[1. 主题总结](#1. 主题总结)
[2. 页面技术分析](#2. 页面技术分析)
[2.1 首页（index.html）](#2.1 首页（index.html）)
[2.2 登录页面（login.html）](#2.2 登录页面（login.html）)
[2.3 注册页面（register.html）](#2.3 注册页面（register.html）)
[2.4 商品详情页（product.html）](#2.4 商品详情页（product.html）)
[3. 通用技术亮点](#3. 通用技术亮点)
[3.1 响应式设计](#3.1 响应式设计)
[3.2 本地存储集成](#3.2 本地存储集成)
[3.3 模块化JavaScript](#3.3 模块化JavaScript)
[3.4 视觉设计](#3.4 视觉设计)
1. 主题总结
本项目是一个基于前端技术栈开发的京东商城模拟网站，包含完整的电商网站核心功能模块。项目采用现代化的前端开发技术和设计理念，打造了一个视觉效果精美、交互体验流畅、功能完善的电商平台前端界面。
项目以京东商城为参考，实现了首页展示、商品详情、用户登录注册等核心业务流程，同时注重代码结构的合理性和可维护性，为后续功能扩展提供了良好的基础。
2. 页面技术分析
2.1 首页（index.html）
**技术实现：**
HTML5语义化布局，使用header、nav、main、section、footer等标签
CSS3 Flexbox和Grid布局系统，实现响应式页面结构
自定义CSS动画效果和过渡，提升用户交互体验
模块化设计，将页面划分为多个功能区块
JavaScript实现的导航交互和购物车功能
**涵盖内容：**顶部导航栏与搜索功能
商品分类导航
促销活动卡片展示
轮播图展示
推荐模块区域（国家补贴、企业会员、京东直播等）
热门商品展示
登录/欢迎卡片
底部推荐标签
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" href="images/1.png" type="image/png">
<title>京东商城 - 首页</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<!-- 顶部导航栏 -->
<header class="header">
<div class="header-top-container">
<div class="logo">
<a href="index.html">京东商城</a>
</div>
<div class="search-bar">
<input type="text" placeholder="搜索商品/店铺" class="search-input">
<button class="search-button">搜索</button>
</div>
<div class="header-right">
<div class="jd-ai">
<button>京东AI</button>
</div>
<div class="sign-in">
<img src="images/1.png" alt="签到" class="sign-in-icon">
<span>天天签到<br>领京豆</span>
</div>
</div>
</div>
<!-- 主导航菜单，作为独立的第二行 -->
<nav class="main-nav-bottom">
<ul class="nav-list">
<li class="nav-item">
<a href="#" class="nav-link">首页</a>
</li>
<li class="nav-item has-submenu">
<a href="#" class="nav-link">商品分类</a>
<ul class="submenu">
<li><a href="#">手机数码</a></li>
<li><a href="#">电脑办公</a></li>
<li><a href="#">家用电器</a></li>
<li><a href="#">服装鞋包</a></li>
</ul>
</li>
<li class="nav-item">
<a href="#" class="nav-link">购物车</a>
</li>
<li class="nav-item">
<a href="login.html" class="nav-link">登录</a>
</li>
<li class="nav-item">
<a href="register.html" class="nav-link">注册</a>
</li>
</ul>
</nav>
</header>
<!-- 二级促销导航/热门搜索词 -->
<section class="secondary-nav">
<div class="secondary-nav-container">
<ul class="secondary-nav-list">
<li><a href="#">狂欢星期六</a></li>
<li><a href="#">下单即抽百万健康免单</a></li>
<li><a href="#">佛雷他定</a></li>
<li><a href="#">多功能沙发床</a></li>
<li><a href="#">脸部卸妆油</a></li>
<li><a href="#">户外露营</a></li>
</ul>
</div>
</section>
<!-- 顶部促销小卡片区域 -->
<section class="top-promo-cards">
<div class="top-promo-container">
<div class="promo-card-item">
<img src="images/9.png" alt="抢购" class="promo-card-img">
<p class="promo-card-title">限时抢好物</p>
</div>
<div class="promo-card-item">
<img src="images/4.png" alt="补贴" class="promo-card-img">
<p class="promo-card-title">国家补贴15%</p>
</div>
<div class="promo-card-item">
<img src="images/5.png" alt="满减" class="promo-card-img">
<p class="promo-card-title">满300减130</p>
</div>
<div class="promo-card-item">
<img src="images/6.png" alt="满减" class="promo-card-img">
<p class="promo-card-title">每满200减30</p>
</div>
<div class="promo-card-item">
<img src="images/2.png" alt="优惠" class="promo-card-img">
<p class="promo-card-title">抢1元玻璃水</p>
</div>
<div class="promo-card-item">
<img src="images/14.png" alt="爆款" class="promo-card-img">
<p class="promo-card-title">爆款直降</p>
</div>
</div>
</section>
<!-- 主要内容区域 -->
<main class="main-content">
<div class="main-layout">
<!-- 左侧商品分类导航 -->
<aside class="category-sidebar">
<ul class="category-list">
<li><a href="#">家用电器</a></li>
<li><a href="#">手机 / 运营商 / 数码</a></li>
<li><a href="#">电脑 / 办公 / 文具用品</a></li>
<li><a href="#">家居 / 家具 / 家装 / 厨具</a></li>
<li><a href="#">男装 / 女装 / 童装 / 内衣</a></li>
<li><a href="#">美妆 / 个护清洁 / 宠物</a></li>
<li><a href="#">女鞋 / 箱包 / 钟表 / 珠宝</a></li>
<li><a href="#">男鞋 / 运动 / 户外</a></li>
<li><a href="#">房产 / 汽车 / 汽车用品</a></li>
<li><a href="#">母婴 / 玩具乐器</a></li>
<li><a href="#">食品 / 酒类 / 生鲜 / 特产</a></li>
</ul>
</aside>
<!-- 右侧主内容区 -->
<div class="main-section">
<!-- 轮播图区域 (保持不变或移动到此处) -->
<section class="banner">
<div class="banner-container">
<img src="images/13.png" alt="banner" class="banner-img">
</div>
</section>
<!-- 推荐模块区域 -->
<section class="recommend-modules">
<div class="module-grid">
<!-- 例如: 国家补贴 x 百亿补贴 -->
<div class="module-card large">
<h3 class="module-title">国家补贴 x 百亿补贴</h3>
<div class="module-content">
<div class="product-item">
<img src="images/10.png" alt="商品" class="product-img">
<p class="price">¥6333</p>
</div>
<div class="product-item">
<img src="images/11.png" alt="商品" class="product-img">
<p class="price">¥3428</p>
</div>
<div class="product-item">
<img src="images/12.png" alt="商品" class="product-img">
<p class="price">¥1800</p>
</div>
</div>
</div>
<!-- 京东助力企业 -->
<div class="module-card medium">
<h3 class="module-title">京东助力企业</h3>
<p class="subtitle">出口转内销</p>
<p class="sub-subtitle">又好又便宜</p>
<img src="images/16.png" alt="推广图" class="promo-image">
</div>
<!-- 企业会员 -->
<div class="module-card small">
<h3 class="module-title">企业会员</h3>
<ul class="feature-list">
<li>多买优惠</li>
<li>41天账期</li>
<li>多档补贴</li>
</ul>
<img src="images/15.png" alt="商品" class="product-img">
<p class="price">¥13999</p>
</div>
<!-- 京东直播 -->
<div class="module-card small">
<h3 class="module-title">京东直播</h3>
<img src="images/17.png" alt="直播" class="product-img">
<p class="product-name">剑南春</p>
</div>
<!-- 京东秒杀 -->
<div class="module-card small">
<h3 class="module-title">京东秒杀</h3>
<div class="module-content">
<div class="product-item">
<img src="images/18.png" alt="商品" class="product-img">
<p class="price">¥33.89</p>
</div>
<div class="product-item">
<img src="images/19.png" alt="商品" class="product-img">
<p class="price">¥4.98</p>
</div>
</div>
</div>
<!-- 9.9包邮 -->
<div class="module-card small">
<h3 class="module-title">9.9包邮</h3>
<img src="images/20.png" alt="商品" class="product-img">
<p class="price">¥6.9</p>
</div>
</div>
</section>
<!-- 登录/欢迎卡片 -->
<aside class="welcome-card">
<div class="card-header">
<img src="images/3.png" alt="头像" class="avatar">
<span>Hi~晚上好</span>
</div>
<p>登录京东后享更多优惠</p>
<button class="login-btn">立即登录</button>
<a href="register.html" class="register-link">注册 ></a>
<div class="utility-links">
<a href="#">享优惠</a>
<a href="#">赚京豆</a>
<a href="#">抽¥50</a>
<a href="#">购卡返</a>
</div>
<div class="icon-links">
<div class="icon-item"><img src="images/30.png" alt="" class="icon"><span>生鲜馆</span></div>
<div class="icon-item"><img src="images/32.png" alt="" class="icon"><span>加油卡</span></div>
<div class="icon-item"><img src="images/31.png" alt="" class="icon"><span>游戏电竞</span></div>
<div class="icon-item"><img src="images/29.png" alt="" class="icon"><span>京东奢品</span></div>
</div>
</aside>
</div>
</div>
<!-- 商品展示区域 (原有部分，可保留或调整) -->
<section class="products">
<h2 class="section-title">热门商品</h2>
<div class="product-grid">
<div class="product-card">
<a href="product.html">
<img src="images/22.png" alt="商品图片" class="product-img">
<h3 class="product-title">商品名称</h3>
<p class="product-price">¥299.00</p>
</a>
</div>
<div class="product-card">
<a href="product.html">
<img src="images/26.png" alt="商品图片" class="product-img">
<h3 class="product-title">商品名称</h3>
<p class="product-price">¥199.00</p>
</a>
</div>
<div class="product-card">
<a href="product.html">
<img src="images/27.png" alt="商品图片" class="product-img">
<h3 class="product-title">商品名称</h3>
<p class="product-price">¥399.00</p>
</a>
</div>
<div class="product-card">
<a href="product.html">
<img src="images/28.png" alt="商品图片" class="product-img">
<h3 class="product-title">商品名称</h3>
<p class="product-price">¥499.00</p>
</a>
</div>
</div>
</section>
</main>
<!-- 底部推荐标签 -->
<section class="bottom-tags">
<div class="tags-container">
<a href="#" class="tag-item active">为你推荐</a>
<a href="#" class="tag-item">潮电好物</a>
<a href="#" class="tag-item">居家优品</a>
<a href="#" class="tag-item">百货生鲜</a>
<a href="#" class="tag-item">服饰美妆</a>
<a href="#" class="tag-item">进口好物</a>
</div>
</section>
<!-- 页脚 -->
<footer class="footer">
<div class="footer-container">
<p>©京东商城. All rights reserved.</p>
</div>
</footer>
<script src="js/main.js"></script>
</body>
</html> 2.2 登录页面（login.html）
**技术实现：**
表单设计与验证
内嵌CSS样式，实现表单的美观布局
JavaScript表单提交处理
响应式表单设计，适配移动端
**涵盖内容：**用户名和密码输入表单
表单验证功能
登录按钮与事件处理
注册账号和忘记密码链接
成功登录后的页面跳转逻辑
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" href="images/1.png" type="image/png">
<title>京东商城 - 登录</title>
<link rel="stylesheet" href="css/style.css">
<style>
.login-container {
max-width: 400px;
margin: 100px auto;
padding: 20px;
background: #fff;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.login-title {
text-align: center;
margin-bottom: 30px;
color: #333;
}
.form-group {
margin-bottom: 20px;
}
.form-group label {
display: block;
margin-bottom: 5px;
color: #666;
}
.form-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
}
.form-group input:focus {
outline: none;
border-color: #e1251b;
}
.login-btn {
width: 100%;
padding: 12px;
background-color: #e1251b;
color: #fff;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s;
}
.login-btn:hover {
background-color: #c81c16;
}
.login-links {
margin-top: 20px;
text-align: center;
}
.login-links a {
color: #666;
margin: 0 10px;
}
.login-links a:hover {
color: #e1251b;
}
</style>
</head>
<body>
<header class="header">
<div class="header-top-container">
<div class="logo">
<a href="index.html">京东商城</a>
</div>
<div class="search-bar">
<input type="text" class="search-input" placeholder="搜索商品">
<button class="search-btn">搜索</button>
</div>
<div class="header-right">
<a href="register.html" class="register-link">注册</a>
</div>
</div>
<nav class="main-nav-bottom">
<ul class="nav-list">
<li class="nav-item"><a href="index.html">首页</a></li>
<li class="nav-item"><a href="#">购物车</a></li>
<li class="nav-item"><a href="#">我的京东</a></li>
<li class="nav-item"><a href="#">客户服务</a></li>
</ul>
</nav>
</header>
<main class="main-content">
<div class="login-container">
<h2 class="login-title">用户登录</h2>
<form id="loginForm" onsubmit="return handleLogin(event)">
<div class="form-group">
<label for="username">用户名</label>
<input type="text" id="username" name="username" required>
</div>
<div class="form-group">
<label for="password">密码</label>
<input type="password" id="password" name="password" required>
</div>
<button type="submit" class="login-btn">登录</button>
<div class="login-links">
<a href="register.html">注册账号</a>
<a href="#">忘记密码？</a>
</div>
</form>
</div>
</main>
<footer class="footer">
<div class="footer-container">
<p>©京东商城. All rights reserved.</p>
</div>
</footer>
<script>
function handleLogin(event) {
event.preventDefault();
const username = document.getElementById('username').value;
const password = document.getElementById('password').value;
// 这里可以添加实际的登录逻辑
console.log('登录信息：', { username, password });
alert('登录成功！');
window.location.href = 'index.html';
}
</script>
</body>
</html> 2.3 注册页面（register.html）
**技术实现：**
复杂表单设计与多字段验证
实时表单验证反馈
正则表达式验证邮箱格式
密码一致性检查
错误提示信息展示
**涵盖内容：**用户信息注册表单（用户名、邮箱、密码、确认密码）
详细的表单验证规则
动态错误提示
注册成功后的处理逻辑
已有账号快速登录入口
注册页面实现了全面的表单验证机制，确保用户输入的数据符合规范，同时提供清晰的错误提示，帮助用户完成注册流程。
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" href="images/1.png" type="image/png">
<title>京东商城 - 注册</title>
<link rel="stylesheet" href="css/style.css">
<style>
.register-container {
max-width: 400px;
margin: 100px auto;
padding: 20px;
background: #fff;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.register-title {
text-align: center;
margin-bottom: 30px;
color: #333;
}
.form-group {
margin-bottom: 20px;
}
.form-group label {
display: block;
margin-bottom: 5px;
color: #666;
}
.form-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
}
.form-group input:focus {
outline: none;
border-color: #e1251b;
}
.register-btn {
width: 100%;
padding: 12px;
background-color: #e1251b;
color: #fff;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s;
}
.register-btn:hover {
background-color: #c81c16;
}
.register-links {
margin-top: 20px;
text-align: center;
}
.register-links a {
color: #666;
}
.register-links a:hover {
color: #e1251b;
}
.error-message {
color: #e1251b;
font-size: 14px;
margin-top: 5px;
display: none;
}
</style>
</head>
<body>
<header class="header">
<div class="header-top-container">
<div class="logo">
<a href="index.html">京东商城</a>
</div>
<div class="search-bar">
<input type="text" class="search-input" placeholder="搜索商品">
<button class="search-btn">搜索</button>
</div>
<div class="header-right">
<a href="login.html" class="login-link">登录</a>
</div>
</div>
<nav class="main-nav-bottom">
<ul class="nav-list">
<li class="nav-item"><a href="index.html">首页</a></li>
<li class="nav-item"><a href="#">购物车</a></li>
<li class="nav-item"><a href="#">我的京东</a></li>
<li class="nav-item"><a href="#">客户服务</a></li>
</ul>
</nav>
</header>
<main class="main-content">
<div class="register-container">
<h2 class="register-title">用户注册</h2>
<form id="registerForm" onsubmit="return handleRegister(event)">
<div class="form-group">
<label for="username">用户名</label>
<input type="text" id="username" name="username" required>
<div class="error-message" id="username-error"></div>
</div>
<div class="form-group">
<label for="email">电子邮箱</label>
<input type="email" id="email" name="email" required>
<div class="error-message" id="email-error"></div>
</div>
<div class="form-group">
<label for="password">密码</label>
<input type="password" id="password" name="password" required>
<div class="error-message" id="password-error"></div>
</div>
<div class="form-group">
<label for="confirm-password">确认密码</label>
<input type="password" id="confirm-password" name="confirm-password" required>
<div class="error-message" id="confirm-password-error"></div>
</div>
<button type="submit" class="register-btn">注册</button>
<div class="register-links">
<p>已有账号？<a href="login.html">立即登录</a></p>
</div>
</form>
</div>
</main>
<footer class="footer">
<div class="footer-container">
<p>©京东商城. All rights reserved.</p>
</div>
</footer>
<script>
function validateForm() {
let isValid = true;
const username = document.getElementById('username').value;
const email = document.getElementById('email').value;
const password = document.getElementById('password').value;
const confirmPassword = document.getElementById('confirm-password').value;
// 重置错误信息
document.querySelectorAll('.error-message').forEach(el => el.style.display = 'none');
// 验证用户名
if (username.length < 3) {
document.getElementById('username-error').textContent = '用户名至少需要3个字符';
document.getElementById('username-error').style.display = 'block';
isValid = false;
}
// 验证邮箱
const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
if (!emailRegex.test(email)) {
document.getElementById('email-error').textContent = '请输入有效的电子邮箱地址';
document.getElementById('email-error').style.display = 'block';
isValid = false;
}
// 验证密码
if (password.length < 6) {
document.getElementById('password-error').textContent = '密码至少需要6个字符';
document.getElementById('password-error').style.display = 'block';
isValid = false;
}
// 验证确认密码
if (password !== confirmPassword) {
document.getElementById('confirm-password-error').textContent = '两次输入的密码不一致';
document.getElementById('confirm-password-error').style.display = 'block';
isValid = false;
}
return isValid;
}
function handleRegister(event) {
event.preventDefault();
if (validateForm()) {
const formData = {
username: document.getElementById('username').value,
email: document.getElementById('email').value,
password: document.getElementById('password').value
};
// 这里可以添加实际的注册逻辑
console.log('注册信息：', formData);
alert('注册成功！');
window.location.href = 'login.html';
}
}
</script>
</body>
</html> 2.4 商品详情页（product.html）
**技术实现：**
产品图片画廊与缩略图切换
数量选择器组件
添加到购物车功能
响应式布局，适配不同屏幕尺寸
JavaScript交互功能实现
**涵盖内容：**商品主图与缩略图展示
商品名称、价格、描述信息
商品数量选择器
加入购物车功能
商品详细信息展示（商品编号、分类、品牌等）
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" href="images/1.png" type="image/png">
<title>京东商城 - 商品详情</title>
<link rel="stylesheet" href="css/style.css">
<style>
.product-detail {
max-width: 1200px;
margin: 80px auto 20px;
padding: 20px;
display: grid;
grid-template-columns: 1fr 1fr;
gap: 40px;
}
.product-gallery {
position: relative;
}
.main-image {
width: 100%;
height: 400px;
object-fit: cover;
border-radius: 8px;
margin-bottom: 20px;
}
.thumbnail-list {
display: flex;
gap: 10px;
}
.thumbnail {
width: 80px;
height: 80px;
object-fit: cover;
border-radius: 4px;
cursor: pointer;
border: 2px solid transparent;
transition: border-color 0.3s;
}
.thumbnail:hover,
.thumbnail.active {
border-color: #e1251b;
}
.product-info {
padding: 20px;
}
.product-name {
font-size: 24px;
margin-bottom: 20px;
color: #333;
}
.product-price {
font-size: 28px;
color: #e1251b;
margin-bottom: 20px;
}
.product-description {
color: #666;
margin-bottom: 30px;
line-height: 1.6;
}
.product-actions {
display: flex;
gap: 20px;
margin-bottom: 30px;
}
.quantity-selector {
display: flex;
align-items: center;
gap: 10px;
}
.quantity-btn {
width: 30px;
height: 30px;
border: 1px solid #ddd;
background: #fff;
cursor: pointer;
font-size: 18px;
display: flex;
align-items: center;
justify-content: center;
}
.quantity-input {
width: 50px;
height: 30px;
text-align: center;
border: 1px solid #ddd;
}
.add-to-cart {
padding: 12px 30px;
background-color: #e1251b;
color: #fff;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s;
}
.add-to-cart:hover {
background-color: #c81c16;
}
.product-meta {
border-top: 1px solid #eee;
padding-top: 20px;
}
.meta-item {
display: flex;
margin-bottom: 10px;
color: #666;
}
.meta-label {
width: 100px;
color: #999;
}
@media (max-width: 768px) {
.product-detail {
grid-template-columns: 1fr;
gap: 20px;
}
.main-image {
height: 300px;
}
.product-actions {
flex-direction: column;
}
.add-to-cart {
width: 100%;
}
}
</style>
</head>
<body>
<header class="header">
<div class="header-top-container">
<div class="logo">
<a href="index.html">京东商城</a>
</div>
<div class="search-bar">
<input type="text" class="search-input" placeholder="搜索商品">
<button class="search-btn">搜索</button>
</div>
<div class="header-right">
<a href="#" class="header-link">京东AI</a>
<a href="#" class="header-link">签到领京豆</a>
<a href="login.html" class="login-link">登录</a>
<a href="register.html" class="register-link">注册</a>
</div>
</div>
<nav class="main-nav-bottom">
<ul class="nav-list">
<li class="nav-item"><a href="index.html">首页</a></li>
<li class="nav-item"><a href="#">购物车</a></li>
<li class="nav-item"><a href="#">我的京东</a></li>
<li class="nav-item"><a href="#">客户服务</a></li>
<li class="nav-item"><a href="#">企业采购</a></li>
<li class="nav-item"><a href="#">企业服务</a></li>
</ul>
</nav>
</header>
<main class="main-content">
<div class="product-detail">
<div class="product-gallery">
<img src="images/22.png" alt="商品主图" class="main-image" id="mainImage">
<div class="thumbnail-list">
<img src="images/21.png" alt="缩略图1" class="thumbnail active" onclick="changeImage(this)">
<img src="images/23.png" alt="缩略图2" class="thumbnail" onclick="changeImage(this)">
<img src="images/24.png" alt="缩略图3" class="thumbnail" onclick="changeImage(this)">
<img src="images/25.png" alt="缩略图4" class="thumbnail" onclick="changeImage(this)">
</div>
</div>
<div class="product-info">
<h1 class="product-name">商品名称</h1>
<div class="product-price">¥299.00</div>
<p class="product-description">
这是一段商品描述文字，详细介绍商品的特点、规格、材质等信息。
商品描述应该包含足够的信息，帮助用户了解商品的具体情况。
</p>
<div class="product-actions">
<div class="quantity-selector">
<button class="quantity-btn" onclick="updateQuantity(-1)">-</button>
<input type="number" class="quantity-input" value="1" min="1" id="quantity">
<button class="quantity-btn" onclick="updateQuantity(1)">+</button>
</div>
<button class="add-to-cart" onclick="addToCart()">加入购物车</button>
</div>
<div class="product-meta">
<div class="meta-item">
<span class="meta-label">商品编号：</span>
<span>123456789</span>
</div>
<div class="meta-item">
<span class="meta-label">商品分类：</span>
<span>电子产品</span>
</div>
<div class="meta-item">
<span class="meta-label">商品品牌：</span>
<span>示例品牌</span>
</div>
</div>
</div>
</div>
</main>
<footer class="footer">
<div class="footer-container">
<p>©京东商城. All rights reserved.</p>
</div>
</footer>
<script>
function changeImage(thumbnail) {
// 更新主图
document.getElementById('mainImage').src = thumbnail.src;
// 更新缩略图选中状态
document.querySelectorAll('.thumbnail').forEach(thumb => {
thumb.classList.remove('active');
});
thumbnail.classList.add('active');
}
function updateQuantity(change) {
const input = document.getElementById('quantity');
const newValue = parseInt(input.value) + change;
if (newValue >= 1) {
input.value = newValue;
}
}
function addToCart() {
const quantity = document.getElementById('quantity').value;
alert(`已添加 ${quantity} 件商品到购物车！`);
}
</script>
</body>
</html> 3. 通用技术亮点
3.1 响应式设计
项目采用了响应式设计原则，通过媒体查询和弹性布局，确保网站在不同屏幕尺寸下都能提供良好的用户体验。特别是在移动端，导航菜单、商品布局等元素都会自动调整以适应小屏幕。
3.2 本地存储集成
项目利用localStorage实现了购物车数据的本地存储，用户可以在不刷新页面的情况下添加和管理商品，提升了交互体验。
3.3 模块化JavaScript
JavaScript代码采用了模块化的设计思想，将不同功能封装为独立函数，如导航初始化、购物车管理、表单验证等，提高了代码的可维护性和复用性。
3.4 视觉设计
项目在视觉设计上参考了京东商城的品牌风格，采用了红色为主色调，搭配白色和灰色作为辅助色，营造出专业、现代的电商氛围。同时，通过阴影、圆角、过渡动画等效果，增强了界面的层次感和交互反馈。