:root{--brand:#4f46e5;--bg:#f7f7f9;--card:#fff;--text:#16181d;--muted:#646b78;--line:#e3e5ea;--err:#c0262d;--radius:12px;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--bg:#111317;--card:#1a1d23;--text:#eceef2;--muted:#9aa1ae;--line:#2b2f38;--err:#ff7b7b}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}h1{text-wrap:balance;margin:0 0 .5rem;font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.2}h2{margin:2.5rem 0 .75rem;font-size:1.25rem}.wrap{max-width:880px;margin:0 auto;padding:0 16px}.muted{color:var(--muted);font-size:.9rem}.err{color:var(--err)}.lead{color:var(--muted);max-width:60ch;margin:0 0 1.5rem}.top{border-bottom:1px solid var(--line);background:var(--card)}.top 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10px;font-size:.85rem;font-weight:500}.actions{flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;display:flex}[hidden]{display:none!important}.list{margin:14px 0 0;padding:0;list-style:none}.row{border-top:1px solid var(--line);align-items:center;gap:10px;padding:8px 0;font-size:.92rem;display:flex}.row .grow{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.status{min-height:1.5em;color:var(--muted);font-size:.9rem}.note{color:var(--muted);margin:12px 0 0;font-size:.85rem}.result{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:18px 0 4px;font-size:clamp(1.3rem,4vw,1.9rem);font-weight:700}.bigip{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:2px 0 12px;font-size:clamp(1.4rem,5vw,2.4rem);font-weight:700}table.kv{border-collapse:collapse;width:100%;font-size:.95rem}table.kv th,table.kv td{text-align:left;border-top:1px solid var(--line);padding:8px 4px}table.kv th{color:var(--muted);width:40%;font-weight:500}.inline-form{gap:8px;margin-top:16px;display:flex}.inline-form input{flex:1}.pairs{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.pairs a{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:999px;padding:4px 12px;font-size:.88rem;display:block}.steps{margin:0;padding-left:1.3rem}.steps li{margin:.35rem 0}details{border:1px solid var(--line);background:var(--card);border-radius:10px;margin:8px 0;padding:12px 16px}summary{cursor:pointer;font-weight:600}details p{color:var(--muted);margin:.6rem 0 0}.prose p,.prose li{max-width:68ch}.ad{text-align:center;min-height:100px;margin:20px 0}.ad .ph{border:1px dashed var(--line);min-height:100px;color:var(--muted);border-radius:8px;place-items:center;font-size:.8rem;display:grid}html.pro .ad,html.pro .pro-link{display:none}.perks{padding-left:1.2rem}.only-pro{display:none}html.pro .only-pro{display:block}html.pro 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