iOS 订阅付费墙界面

生成一张 1024x1280 像素、4:5 竖版无品牌手机年度订阅付费页。顶部标题「升级专业版」，副标题「解锁全部功能，无广告，可随时取消」。功能列表：「AI 写作助手」「无限同步」「优先支持」。价格卡：「月付 ￥8.99」「年付 ￥59.99」，年付卡高亮徽章「最划算」。底部按钮「继续升级」，链接「暂不升级」。所有可见文字为简体中文和人民币价格；AI 可保留；不出现英文套餐、美元符号、真实支付品牌、水印或乱码。

A pixel-perfect iOS paywall screen for a premium productivity app in dark mode. The background is deep dark purple-black. The top third features a glowing orb illustration in electric violet and gold, radiating soft light rays. Below the orb: heading "Go Premium" in 28px bold white, followed by a subtitle "Unlock everything. No ads. Cancel anytime." in 15px muted lilac. Three feature rows each have a gold checkmark icon, a feature title in white 16px semibold, and a one-line description in 13px gray. Features listed: "AI Writing Assistant", "Unlimited Sync", "Priority Support". Below the feature rows, two pricing plan cards: the left card "Monthly" shows "$8.99/mo" in white on a dark surface, the right card "Yearly" shows "$59.99/yr" ($4.99/mo equivalent) in white with a "Best Value" badge in gold — this card has a glowing violet border. A full-width rounded "Start Free Trial" CTA button in gold gradient sits at the bottom, followed by tiny 11px gray legal text: "7-day free trial, then billed annually." and "Restore Purchase" link.