:root{--bg:#ffffff;--bg-alt:#f6f8fa;--ink:#0f172a;--ink-soft:#334155;--ink-mid:#64748b;--line:#e2e8f0;--line-strong:#cbd5e1;--accent:#1f3d63;--accent-deep:#16293f;--accent-soft:#eef2f7;--sans:"Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;--disp:"Inter", "Noto Sans JP", system-ui, sans-serif;--mono:"IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.9;letter-spacing:.01em;-webkit-font-smoothing:antialiased}a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.wrap{max-width:760px;margin:0 auto;padding:0 32px}.topbar{display:flex;justify-content:space-between;align-items:baseline;padding:26px 0;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--ink-mid);text-transform:uppercase}.hero{padding:80px 0 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