:root{--bg: #0f1419;--surface: #1a2332;--border: #2d3a4d;--text: #e8edf4;--muted: #8b9bb4;--accent: #3b82f6;--accent-dim: #2563eb;--danger: #ef4444;--radius: 12px;--font: "DM Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);background:radial-gradient(1200px 600px at 10% -10%,#1e3a5f 0%,transparent 55%),radial-gradient(800px 400px at 90% 0%,#312e81 0%,transparent 50%),var(--bg);color:var(--text);line-height:1.5}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.layout{min-height:100%;display:flex;flex-direction:column;max-width:960px;margin:0 auto;padding:1.25rem 1rem 2rem}nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}.brand{font-weight:700;font-size:1.15rem;letter-spacing:-.02em}.nav-links{display:flex;gap:1rem;font-size:.95rem}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;box-shadow:0 12px 40px #00000040}.messages{flex:1;min-height:320px;max-height:min(60vh,520px);overflow-y:auto;padding:.5rem 0;display:flex;flex-direction:column;gap:.75rem}.msg{max-width:92%;padding:.65rem .9rem;border-radius:10px;font-size:.95rem;white-space:pre-wrap;word-break:break-word}.msg.user{align-self:flex-end;background:#1d4ed8;color:#f8fafc}.msg.assistant{align-self:flex-start;background:#243044;border:1px solid var(--border)}.msg.error{align-self:stretch;background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.35);color:#fecaca}.input-row{display:flex;gap:.5rem;margin-top:1rem}input[type=text],input[type=password],textarea{flex:1;background:#0c1118;border:1px solid var(--border);border-radius:10px;color:var(--text);padding:.65rem .85rem;font:inherit}textarea{min-height:44px;resize:vertical;max-height:160px}button{font:inherit;cursor:pointer;border:none;border-radius:10px;padding:.55rem 1.1rem;background:var(--accent);color:#fff;font-weight:600}button:hover:not(:disabled){background:var(--accent-dim)}button:disabled{opacity:.55;cursor:not-allowed}button.secondary{background:#334155}button.danger{background:var(--danger)}.hint{font-size:.8rem;color:var(--muted);margin-top:.5rem}.table-wrap{overflow-x:auto;margin-top:.75rem}table{width:100%;border-collapse:collapse;font-size:.88rem}th,td{text-align:left;padding:.45rem .5rem;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600}.row-active{background:rgba(59,130,246,.12)}.upload-zone{margin-top:.75rem;padding:1rem;border:1px dashed var(--border);border-radius:10px;font-size:.9rem;color:var(--muted)}