:root{color-scheme:light dark;--bg:#f7f7f3;--card:#fff;--ink:#1d242b;--muted:#566271;--line:#dbe0e5;--accent:#244bb7}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.85 system-ui,"Microsoft YaHei",sans-serif}header,main,footer{max-width:1120px;margin:auto;padding:28px}header{display:flex;justify-content:space-between;gap:24px;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:800;text-decoration:none;color:var(--ink)}.brand img{width:40px;height:40px;object-fit:contain;background:white;border-radius:8px}nav{display:flex;gap:22px;flex-wrap:wrap}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}h1{font-size:clamp(32px,4.8vw,54px);line-height:1.35;letter-spacing:-1.2px;margin:18px 0 24px}h2{font-size:26px;line-height:1.45}h3{font-size:20px}.eyebrow{font-size:13px;letter-spacing:2px;color:var(--accent);margin-top:48px}.intro{font-size:20px;max-width:850px;color:var(--muted)}section{padding:24px 0;border-top:1px solid var(--line);margin-top:32px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}article{padding:22px;background:var(--card);border:1px solid var(--line);border-radius:12px}article h3{margin-top:0}.button{display:inline-block;background:var(--accent);color:white;padding:12px 20px;border-radius:8px;text-decoration:none}.actions{display:flex;gap:24px;align-items:center;flex-wrap:wrap}.note,figcaption{color:var(--muted);font-size:14px}figure{margin:24px 0}figure img{width:100%;max-height:540px;object-fit:contain;background:var(--card);border:1px solid var(--line);border-radius:12px}code{overflow-wrap:anywhere;font-size:.93em}li{margin:12px 0}footer{border-top:1px solid var(--line);font-size:14px;color:var(--muted);padding-bottom:50px}@media(prefers-color-scheme:dark){:root{--bg:#111820;--card:#19232e;--ink:#edf2f7;--muted:#adbbcd;--line:#344252;--accent:#9fbcff}.button{background:#2c51be;color:white}}@media(max-width:650px){header{align-items:flex-start;flex-direction:column}header,main,footer{padding:22px}nav{gap:12px 20px;font-size:14px}.eyebrow{margin-top:24px}}
