def block_website(url: str) -> bool:
        """
        屏蔽网站
        :param url: 要屏蔽的网站域名
        :return: 是否成功
        """
        hosts_path = r"C:\Windows\System32\drivers\etc\hosts"
        try:
            # 验证URL格式
            if not url or '.' not in url:
                raise ValueError("无效的URL格式")

            with open(hosts_path, 'a+', encoding='utf-8') as f:
                f.seek(0)
                content = f.read()

                # 检查是否已存在
                if url in content:
                    messagebox.showwarning("提示", "该网站已被屏蔽")
                    return False

                # 添加屏蔽条目
                f.write(f"\n127.0.0.1 {url}\n127.0.0.1 www.{url}\n")
            return True

        except PermissionError:
            messagebox.showerror("权限错误", "需要管理员权限运行程序")
            return False
        except Exception as e:
            messagebox.showerror("错误", f"屏蔽失败: {str(e)}")
            return False