:root{--ink:#142b36;--muted:#657985;--nav:#152932;--blue:#286786;--gold:#bf8927;--line:#dce5e7;--bg:#f2f5f4;--card:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Microsoft YaHei",system-ui,sans-serif}.chat-shell{width:min(1180px,calc(100% - 32px));min-height:100vh;margin:auto;padding:28px 0 18px;display:grid;grid-template-rows:auto 1fr auto auto;gap:16px}.chat-shell>header{display:flex;justify-content:space-between;gap:24px;align-items:flex-start}.eyebrow{color:var(--blue);font-weight:700;letter-spacing:.15em;font-size:12px}h1{font-size:34px;margin:8px 0 4px}p{margin:0;color:var(--muted)}.controls{display:flex;gap:10px}.controls select,.controls a{border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px 14px;color:var(--ink);text-decoration:none}.messages{overflow:auto;padding:8px 2px;display:flex;flex-direction:column;gap:14px}.message{max-width:88%;border:1px solid var(--line);border-radius:14px;padding:18px 20px;background:var(--card);box-shadow:0 5px 18px #1e3b4610}.message.user{align-self:flex-end;background:var(--nav);color:white;border-color:var(--nav)}.message h2{font-size:17px;margin:0 0 12px}.chips{display:flex;gap:8px;flex-wrap:wrap}.chips button{border:1px solid #cbdadd;border-radius:999px;background:#f7faf9;padding:8px 12px;color:var(--blue);cursor:pointer}.result-table{width:100%;border-collapse:collapse;margin-top:12px;font-size:14px}.result-table th{background:#edf3f3;color:#536a74;text-align:left}.result-table th,.result-table td{padding:10px;border-bottom:1px solid var(--line)}.meta{font-size:12px;color:var(--muted);margin-top:12px}.warning{color:#996a10;background:#fff4dc;padding:8px 10px;border-radius:8px;margin-top:8px}.composer{display:grid;grid-template-columns:1fr auto;gap:10px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px}.composer textarea{resize:none;border:0;outline:0;font:inherit;padding:10px}.composer>button{border:0;border-radius:10px;background:var(--blue);color:#fff;font-weight:700;padding:0 24px;cursor:pointer}.sql-detail{margin-top:12px;color:var(--muted);font-size:12px}.sql-detail summary{cursor:pointer}.sql-detail pre{white-space:pre-wrap;overflow:auto;background:#f4f7f7;padding:12px;border-radius:8px;color:#405761}footer{font-size:12px;color:var(--muted)}@media(max-width:720px){.chat-shell>header{display:block}.controls{margin-top:12px}.message{max-width:100%}.composer{grid-template-columns:1fr}.composer>button{height:42px}}