Option Visualization Tool (European Options) / 期权可视化分析工具（欧式期权）
Web tool based on the Black–Scholes model for European options. Supports theoretical option pricing, implied volatility (IV) inference,
and 2D/3D visualization of Delta and Gamma over underlying price and time-to-expiry. Please enable JavaScript for full functionality.
基于 Black-Scholes 模型的欧式期权在线工具，支持看涨/看跌期权理论定价、隐含波动率 IV 反推，
以及 Delta、Gamma 随标的价格与到期时间的 2D/3D 可视化分析。请启用 JavaScript 以使用完整功能。