1. Overview
1. 概述
Hanyu ABC (chineseabc.org) is a free Chinese-learning website. This policy explains what data we collect, why we collect it, and the choices you have.
Hanyu ABC（chineseabc.org）是一个免费的中文学习网站。本政策说明我们收集哪些数据、为什么收集，以及你拥有哪些选择权。
2. What We Collect
2. 我们收集的数据
Account data: when you register, we store your email address and a securely hashed password. Authentication is hosted by Supabase — we never see or store your plaintext password.
账号数据：注册时我们保存你的邮箱和加密哈希后的密码；认证由 Supabase 托管，我们永远看不到你的明文密码。
Learning data: your progress records (completed lessons, quiz results, practice streaks) are stored with your account so they can sync across your phone, tablet and computer.
学习数据：学习进度（已完成课程、测验成绩、连续练习天数）随账号保存，用于手机、平板、电脑等多设备同步。
Usage statistics: with your consent, we use Google Analytics to collect anonymous page-view and interaction data. The analytics script loads only after you click "Accept" on the cookie banner.
访问统计：经你同意后，我们通过 Google Analytics 收集匿名页面访问与互动数据；只有你在横幅上点击「接受」后统计脚本才会加载。
If you only browse without an account and decline cookies, we collect nothing that identifies you.
如果你只是浏览、不注册并拒绝 cookie，我们不会收集任何可识别你身份的数据。
3. How We Use Data
3. 数据用途
We use your data only to: sign you in, sync your learning progress across devices, and understand which lessons are useful so we can improve them. We never sell your data and never send spam.
数据仅用于：登录认证、多设备进度同步、了解课程内容的使用情况以改进网站。我们绝不出售你的数据，也不发送垃圾邮件。
4. Cookies & Consent
4. Cookie 与同意
Google Analytics uses cookies (such as _ga) to distinguish anonymous visitors. On your first visit, a banner lets you Accept or Decline; your choice is saved in your browser's local storage (key pylearn_consent_v1). If you decline, no analytics script is loaded and every learning tool keeps working. To change your choice, clear this site's data in your browser and the banner will appear again.
Google Analytics 使用 _ga 等 cookie 区分匿名访客。首次访问时横幅让你选择「接受」或「拒绝」，选择保存在浏览器本地存储中（键名 pylearn_consent_v1）。拒绝则不加载任何统计脚本，学习功能完全不受影响。如需更改选择，清除本站数据后横幅会再次出现。
5. Third-Party Processors
5. 第三方处理方
We rely on two service providers: Supabase (hosting, authentication and database — see supabase.com/privacy) and Google Analytics (anonymous usage statistics — see policies.google.com/privacy). Both process data under their own privacy terms.
我们依赖两家服务方：Supabase（托管、认证与数据库，见其官网隐私政策）和 Google Analytics（匿名统计，见 Google 隐私政策），二者按各自隐私政策处理数据。
6. Data Retention
6. 数据保留
Account and progress data are kept while your account is active. If you ask us to delete your account, we remove your email, credentials and synced progress within 30 days. Anonymous analytics data is retained by Google under its standard settings.
账号存续期间我们保留账号与进度数据；你申请注销后，邮箱、凭据与同步进度将在 30 天内删除。匿名统计数据由 Google 按其默认设置保留。
7. Your Rights (GDPR)
7. 你的权利（GDPR）
You have the right to access, correct, export and delete your personal data, and to withdraw consent at any time. Email us at the address below and we will respond within 30 days.
你有权访问、更正、导出和删除你的个人数据，并可随时撤回同意。发送邮件至下方地址即可，我们会在 30 天内回复。
8. Children
8. 未成年人
This site is not directed at children under 13. Children under 13 may use it only through an account registered and supervised by a parent or legal guardian — see our Terms of Service.
本站不面向 13 岁以下儿童；13 岁以下儿童须由家长或监护人代为注册并陪同使用，详见服务条款。
9. Changes to This Policy
9. 政策变更
If we change this policy, we will update this page and the effective date above. Significant changes will be announced on the homepage.
如有变更，我们会更新本页与上方生效日期；重大变更会在首页公告。
10. Contact
10. 联系我们
Questions or requests about your data: [email protected].
任何关于个人数据的问题或请求，请联系 [email protected]。