Secure password generator with multiple character sets and strength analysis. Use when: (1) generating strong passwords, (2) creating memorable passphrases, (3) analyzing password strength, or (4) any password-related security needs. Supports random passwords, passphrases, and detailed strength analysis.

安全密码生成器，支持多种字符集和强度分析。适用于：(1) 生成强密码，(2) 创建易记的密码短语，(3) 分析密码强度，或 (4) 任何与密码相关的安全需求。支持随机密码、密码短语及详细强度分析。