:root{--bg:#ffffff;--bg-subtle:#f6f7f9;--fg:#111114;--fg-muted:#5d5d6b;--border:#e3e4e9;--accent:#1f5fd8;--accent-fg:#ffffff;--accent-hover:#1a51b8;--ring:#a8c3f2;--font-sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans TC","PingFang TC","Microsoft JhengHei","Helvetica Neue",sans-serif;--step--1:0.875rem;--step-0:1rem;--step-1:1.125rem;--step-2:1.375rem;--step-3:1.875rem;--step-4:clamp(2.25rem,1.55rem + 2.8vw,3.25rem);--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-6:1.5rem;--space-8:2rem;--space-12:3rem;--space-16:4rem;--radius:10px;--radius-lg:16px;--container:64rem;--measure:66ch;--ease-out:cubic-bezier(0.23,1,0.32,1);--ease-in-out:cubic-bezier(0.77,0,0.175,1);--dur-press:160ms;--dur-reveal:300ms}