SaaS 付费升级拦截页

生成一张 1024x1280 像素、4:5 竖版 SaaS 升级付费页面截图。顶部大标题「解锁完整能力」，副标题「按需选择，随时取消」。三列套餐卡：「入门版 ￥29/月」「专业版 ￥99/月」「企业版 联系我们」，中间卡高亮并带徽章「最受欢迎」。按钮分别写「开始使用」「立即升级」「预约演示」。顶部角落写「Unlock the full power」。底部小字「30天退款保障」。所有用户可见文字为简体中文和人民币价格；SaaS 可作为行业缩写；不出现英文套餐、英文按钮、美元符号、真实品牌、水印或乱码。

A desktop browser mockup of a SaaS paywall and plan-upgrade screen at 1280 px, using a clean light-mode layout with subtle glassmorphism accents. Center content: a modal or full-section layout with the headline "Unlock the full power" in bold 40 px sans-serif. Three pricing tier cards arranged side by side: "Starter" ($0/mo, gray border), "Pro" ($29/mo, highlighted with a violet gradient border and a "Most Popular" ribbon badge), "Enterprise" ($99/mo, dark border). Each card lists 5 feature bullet points with checkmark icons; Pro and Enterprise bullets use filled violet icons, Starter uses gray. The Pro card has a "Upgrade Now" button in solid violet; others have outlined buttons. Below the cards, a feature comparison toggle "Monthly / Annually" with annual showing "Save 20%" in green. A trust row at the bottom shows logos of payment providers and text "30-day money-back guarantee". Frosted glass background panel behind cards. Color palette: white page, violet #7C3AED Pro accent, green saving badge, soft shadow on cards.