:root{color-scheme:light;--font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans TC",sans-serif;--bg-app:#f6f8fa;--bg-panel:#ffffff;--bg-sidebar:#ffffff;--text-main:#1e293b;--text-muted:#64748b;--border-color:#e2e8f0;--accent:#6366f1;--accent-hover:#4f46e5;--accent-light:#e0e7ff;--success:#10b981;--success-light:#d1fae5;--grad-drinks:linear-gradient(135deg,#38bdf8,#0284c7);--grad-cakes:linear-gradient(135deg,#fb923c,#ea580c);--grad-japanese:linear-gradient(135deg,#34d399,#059669);--grad-default:linear-gradient(135deg,#94a3b8,#475569)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-app);color:var(--text-main);font-family:var(--font-sans);overflow-x:hidden;-webkit-font-smoothing:antialiased}.pos-app{min-height:100vh;display:flex;flex-direction:column}.pos-header{background:#0f172a;color:#ffffff;padding:16px 24px;justify-content:space-between;flex-wrap:wrap;gap:16px;box-shadow:0 4px 20px 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