regex101 访问正常

The user wants me to generate a professional website introduction for regex101.com in Chinese, as an HTML snippet for a navigation site detail page. Let me follow the structure carefully: 1. h2 title: "regex101：...一句话说明" 2. Opening paragraph 3. Core functions (h3 + grid) 4. Main use cases (h3 + grid) 5. Technical features / website advantages regex101 is a well-known online regex tester and debugger. I know this tool well: - Real-time regex matching with highlighting - Detailed explanation of regex patterns - Support for multiple languages: PCRE2, JavaScript, Python, Go, Java, .NET, Rust, POSIX ERE/BRE - Substitution (replace) functionality - Unit tests - Benchmarking - Code generation - Regular expressions library (community patterns) - Quick reference Let me write this in Chinese, keeping it objective and not exaggerating. I shouldn't mention specific prices, company info, etc. Let me structure it: Title: regex101：在线正则表达式测试与调试工具 Opening: regex101 是一款面向开发者的在线正则表达式测试与调试工具，提供实时匹配高亮、模式解析、多语言代码生成等功能，适合需要编写、验证和维护正则表达式的程序员、数据分析师及技术学习者使用。 Core functions: - Real-time match highlighting - Detailed explanation - Multi-language support (PCRE2, JavaScript, Python, Go, Java, .NET, Rust, POSIX ERE/BRE) - Substitution / replace - Unit tests & benchmarking - Code generation Main use cases: - Debugging complex regex - Learning regex (explanation feature) - Data extraction from text - Code snippet generation for various languages - Testing regex compatibility across engines Website advantages: - No installation needed, browser-based - Visual debugging with step-by-step match info - Community pattern library (this I know exists - there is a "Library" section) - Quick reference Wait, the instruction says "如果该网站是 AI、工具、开发、设计、办公、资源类网站，请输出 h3 标题"技术特点"或"网站优势"." - since this is a tool/development site, I should output "网站优势" or "技术特点". Since I can verify some technical aspects from the SEO description (real-time highlighting, detailed explanations, substitutions, unit tests, benchmarking, code generation, multiple regex engine support), I can use "技术特点" actually. But the instruction says if uncertain, use "网站优势". I know regex101 well so I can describe its technical features. Let me use "技术特点". Actually let me re-read: "如果无法判断具体技术，请写"网站优势"，不要编造技术细节。" Since I do know the technical details (it's a well-known tool), I'll use "技术特点". But to be safe and conservative, maybe "网站优势" is safer? Hmm. The SEO description lists real-time match highlighting, detailed explanations, substitutions, unit tests, benchmarking, code generation, and engine support. That's verifiable from the given info. So "技术特点" is justified. Let me write the content: **Title:**

regex101：在线正则表达式测试、调试与学习工具

**Opening paragraph:**

regex101 是一款面向开发者的在线正则表达式测试与调试平台，提供实时匹配高亮、表达式释义、替换、单元测试与基准测试等完整功能。它支持 PCRE2、JavaScript、Python、Go、Java、.NET、Rust 及 POSIX 等多种正则引擎，适合需要编写、验证和维护正则表达式的程序员、数据分析师以及正在学习正则表达式的技术爱好者。

**Core functions:** Transition: 围绕正则表达式的全流程工作需求，regex101 提供了以下核心能力： 1. ✓ 实时匹配高亮：输入表达式与测试文本后，匹配结果即时高亮显示，反馈高效直观。 2. ✓ 表达式释义：逐步解析正则表达式的每一段含义，帮助理解复杂模式。 3. ✓ 多引擎支持：内置 PCRE2、JavaScript、Python、Go、Java、.NET、Rust 及 POSIX ERE/BRE 等主流正则引擎。 4. ✓ 替换与代码生成：支持替换测试，并可生成对应编程语言的代码片段。 5. ✓ 单元测试与基准测试：对自定义用例进行测试与执行时间对比，验证表达式的正确性和性能。 **Main use cases:** 1. ✓ 调试复杂正则：拆解长表达式，定位匹配逻辑中的问题。 2. ✓ 正则学习入门：借助逐步释义和实时反馈理解规则语法。 3. ✓ 多语言代码提取：为不同编程语言生成可直接使用的正则代码。 4. ✓ 数据清洗与校验：验证邮箱、手机号、URL 等文本格式。 5. ✓ 性能评估：通过基准与调试功能评估不同写法的执行效率。 **Technical features (技术特点):** 1. ✓ 全浏览器在线运行：无需安装即可使用，打开即测。 2. ✓ 多引擎切换对比：同一表达式可切换不同引擎检查兼容性差异。 3. ✓ 结构化解析信息：展示组、捕获、匹配位置等详细调试信息。 4. ✓ 可分享与存储：支持保存、分享表达式，便于团队协作与复盘。（Hmm, is this verified? regex101 does support saving patterns via account. I know this as a fact. But to be safe, I could phrase it as "支持将常用的表达式与用例保存，便于后续复用与分享。" It does have this feature - you can save regex patterns. Yes, regex101 has a "Save" feature with