:root{--color-red:red;--color-yellow:#ffc300;--color-green:#00aa2d;--color-blue:#005fff;--color-orange:#ff8c00;--color-purple:purple;--color-bg:#f5f7fa;--color-surface:#fff;--color-text-primary:#1a1a1a;--color-text-secondary:#666;--color-border:#e2e8f0;--shadow-sm:0 2px 4px #0000000a;--shadow-md:0 8px 16px #00000014;--shadow-lg:0 12px 24px #0000001f;--radius-sm:8px;--radius-md:16px;--radius-lg:24px;--radius-full:9999px;--transition-fast:.2s ease-in-out;--transition-smooth:.3s cubic-bezier(.4, 0, .2, 1)}body{background-color:var(--color-bg);color:var(--color-text-primary);-webkit-font-smoothing:antialiased;margin:0;font-family:Yu Gothic,YuGothic,Hiragino Kaku Gothic ProN,sans-serif;line-height:1.6}*,:before,:after{box-sizing:border-box}.lit-header{background:var(--color-surface);box-shadow:var(--shadow-sm);z-index:100;position:sticky;top:0}.lit-container{max-width:1024px;margin:0 auto;padding:0 16px}