I now have all files read. Based on the pasted text instructions, I need to make a comprehensive visual overhaul. Let me apply all the changes systematically:

1. globals.css - Neutral palette (#F5F5F7 background, #1D1D1F text), premium font stack, rounded-[40px]
2. layout.tsx - Switch to Inter font (premium sans-serif)
3. All components - White cards with diffused shadows, no borders, massive whitespace, clean Cuberto feel

Let me start:

Now update all components with the clean Cuberto aesthetic:

Now update the SectionHeader to match the cleaner style (though it's only used in hardware section now, let me keep it updated):

整套视觉系统已按照 Cuberto 美学和你的修改指南全面重构。主要变更包括：背景改为苹果风格的 #F5F5F7 浅灰白，文字统一为 #1D1D1F 深炭色，字体切换为 Inter（高端无衬线）+ Playfair Display（仅用于 italic 装饰强调），所有卡片改为纯白底+圆角 40px+大面积漫射阴影（无边框），Pudding Yellow 仅用于小徽章、图标和主按钮等点缀位置，CTA 按钮加入磁力跟随光标效果，全站间距翻倍营造"呼吸感"。

Now I have a clear picture of all italic and background color locations. Let me fix them all:

Now fix the themeColor in layout:

Now remove all italic/font-serif spans across components. Let me read and fix each one:

Good, now I have all files read. Let me fix all italic/font-serif instances across all 6 components:

已完成两项修改：1) 将全站背景色从 #F5F5F7 改为纯白 #FFFFFF，secondary 改为更淡的 #F8F8FA，themeColor 同步更新；2) 移除了所有 6 个组件中的 font-serif italic 斜体样式，改为统一使用 Inter 无衬线字体，保留了颜色层级区分但去掉了装饰性斜体，整体更干净利落。