:root{color-scheme:light;--bg:#f4f7fb;--card:#fff;--ink:#172033;--muted:#64748b;--line:#dce4ef;--accent:#2457d6;--accent-soft:#e9efff;--code:#111827;--code-bg:#eef2f7;--shadow:0 14px 36px #20304d12}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}header{background:linear-gradient(135deg,#172b58,#2457d6 65%,#4c7df0);color:#fff}.wrap{max-width:1120px;margin:auto;padding:28px 22px}header .wrap{padding-top:38px;padding-bottom:38px}nav{max-width:1120px;margin:auto;padding:14px 22px;display:flex;gap:14px;flex-wrap:wrap}nav a{color:#dce7ff;text-decoration:none;font-weight:700}h1{margin:5px 0 8px;font-size:clamp(28px,4vw,46px);line-height:1.12}h2{margin-top:32px;border-bottom:1px solid var(--line);padding-bottom:7px}h3{margin-top:24px}.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:800;opacity:.8}.lead{margin:0;color:#e8efff;font-size:18px}.meta{color:#d4e0ff;font-size:14px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:26px;margin:28px auto}.content{max-width:900px}.content a{color:var(--accent)}.content code{background:var(--code-bg);border-radius:5px;padding:2px 5px}.content pre{background:var(--code);color:#e5edf9;overflow:auto;border-radius:12px;padding:18px}.content blockquote{border-left:4px solid var(--accent);margin-left:0;padding-left:16px;color:var(--muted)}.content table{width:100%;border-collapse:collapse;display:block;overflow:auto}.content th,.content td{text-align:left;border:1px solid var(--line);padding:9px 11px;vertical-align:top}.content th{background:var(--accent-soft)}.content ul,.content ol{padding-left:25px}.back{display:inline-block;margin-top:18px;font-weight:800;text-decoration:none}.error{border-left:5px solid #b42318;color:#8b1e17;background:#fff1f0;padding:14px;border-radius:8px}.footer{max-width:1120px;margin:35px auto;padding:0 22px 40px;color:var(--muted);font-size:13px}@media(max-width:700px){.wrap{padding-left:15px;padding-right:15px}.card{padding:18px}}
 .content pre,.content pre code{background:#111827;color:#fff;-webkit-text-fill-color:#fff}.content pre code{padding:0;border-radius:0}