:root{color-scheme:light;--color-white:#fff;--color-paper:#f3f6f8;--color-ink:#0b2433;--color-navy:#0b2433;--color-blue:#315f73;--color-steel:#52656e;--color-line:#d6e0e5;--color-line-dark:#365160;--color-signal:#c4431d;--color-signal-light:#c4d9e3;--color-work-line:#c4431d;--container:1280px;--gutter:clamp(20px, 5.5vw, 80px);--font-display:"Aptos Display", "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;--font-body:Aptos, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;--font-utility:"SFMono-Regular", Consolas, "Liberation Mono", monospace;--size-hero:clamp(2.5rem, 4.2vw, 3.5rem);--size-section:clamp(1.875rem, 3vw, 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