:root{--canvas:#f7f7f4;--surface-soft:#f0f0ec;--surface-card:#fff;--ink:#171817;--body:#424441;--muted:#6e716d;--hairline:#d9dcd7;--surface-dark:#151716;--surface-dark-elevated:#202321;--on-dark:#f7f7f4;--on-dark-muted:#a7aca6;--accent:#0f766e;--accent-hover:#115e59;--accent-soft:#d8eeea;--success:#167a3d;--warning:#9a5b00;--error:#b42318;--font-sans:Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono:"JetBrains Mono", "SFMono-Regular", Consolas, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--canvas);color:var(--ink);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}::selection{background:var(--accent-soft);color:var(--ink)}