AWS 採用「共同責任模型」 助客戶在雲端系統上構建高韌性方案

整理文章主題及內容脈絡，撰寫適合商業及一般讀者閱讀的中文文案。

I structured the topic and wrote Chinese copy for business and general readers.

解釋 AWS「共同責任模型」，梳理基礎設施、網絡及應用層面的安全分工。文章以責任如何劃分為核心，協助讀者理解供應商與客戶各自需要處理的部分。

An explainer on AWS’s shared-responsibility model and the division of security responsibilities across infrastructure, networks and applications. It focuses on who is responsible for what, helping readers understand the respective roles of provider and customer.