:root{color-scheme:light;--ink:#172016;--paper:#faf7ef;--leaf:#23613e;--line:#d9d0bf;--muted:#5f675b}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Georgia,'Noto Serif SC','Noto Serif TC','Noto Serif JP',serif;line-height:1.7}header,footer{display:flex;gap:1rem;justify-content:space-between;align-items:center;padding:1rem max(1.25rem,calc((100vw - 70rem)/2));border-bottom:1px solid var(--line);font-family:system-ui,sans-serif}footer{border-top:1px solid var(--line);border-bottom:0;color:var(--muted);font-size:.85rem}.brand,header a{color:var(--ink);text-decoration:none}.brand{font-weight:800}.shell{max-width:70rem;margin:auto;padding:4rem 1.25rem}.guide{max-width:54rem}.eyebrow{color:var(--leaf);font:700 .8rem/1.2 system-ui,sans-serif;letter-spacing:.12em;text-transform:uppercase}.lead{font-size:1.2rem;color:var(--muted)}h1{font-size:clamp(2.25rem,6vw,4.4rem);line-height:1.05;margin:.3rem 0 1.5rem}h2{line-height:1.2;margin-top:2.25rem}.guide section{border-top:1px solid var(--line);padding-top:1rem;margin-top:2rem}.boundary{background:#eaf0e5;padding:1.25rem}.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1rem;margin-top:2rem}.guide-grid article{background:#fffdf8;border:1px solid var(--line);padding:1.25rem}.guide-grid h2{margin:.2rem 0 .75rem;font-size:1.3rem}.guide-grid a{color:var(--leaf)}