:root{--bg:#fff;--surface:#f7f8fa;--fg:#111;--muted:#6b7280;--border:#d9dee7;--accent:#1677ff;--maxw:1440px;--gutter:clamp(20px, 5vw, 64px);--t:.2s cubic-bezier(.2, 0, .2, 1)}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased;margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;font-size:17px;line-height:1.6}a{color:inherit}img{max-width:100%;display:block}.container{max-width:var(--maxw);padding-inline:var(--gutter);margin:auto}@media (width<=600px){body{font-size:16px}}