:root{--brand: #2563eb;--brand-dark: #1d4ed8;--brand-soft: #eff6ff;--bg: #f4f6fb;--surface: #ffffff;--line: #e5e9f0;--text: #1f2937;--muted: #6b7280;--ok: #16a34a;--warn: #d97706;--radius: 14px;font-family:PingFang SC,Microsoft YaHei,Inter,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}button{font:inherit;cursor:pointer}input,textarea{font:inherit}.app{display:flex;flex-direction:column;height:100vh;background:radial-gradient(circle at 15% 0%,rgba(37,99,235,.08),transparent 32%),radial-gradient(circle at 85% 10%,rgba(16,185,129,.07),transparent 28%),var(--bg)}.topbar{display:flex;align-items:center;justify-content:space-between;min-height:64px;height:auto;flex-wrap:wrap;gap:8px 12px;padding:10px 24px;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:0 1px 2px #0f172a0a}.brand{display:flex;align-items:center;gap:10px;min-width:0;flex:1 1 auto}.brand-text{min-width:0}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#38bdf8);color:#fff;font-weight:700;letter-spacing:.5px;flex-shrink:0}.brand-text h1{margin:0;font-size:17px;line-height:1.2;white-space:nowrap}.brand-text p{margin:2px 0 0;font-size:12px;color:var(--muted);line-height:1.4}.topbar-actions{display:flex;align-items:center;gap:10px}.ghost-btn{padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--text);text-decoration:none;font-size:14px;transition:all .15s}.ghost-btn:hover{border-color:var(--brand);color:var(--brand)}.layout{display:flex;flex:1;min-height:0}.chat-area{flex:1;min-width:0;display:flex;flex-direction:column}.messages{flex:1;overflow-y:auto;padding:24px 24px 8px}.messages::-webkit-scrollbar{width:8px}.messages::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}.message{display:flex;flex-direction:column;max-width:720px;margin:0 auto 16px}.message.user{align-items:flex-end}.message.assistant{align-items:flex-start}.bubble{padding:12px 16px;border-radius:var(--radius);max-width:100%;line-height:1.7;word-break:break-word}.message.user .bubble{background:var(--brand);color:#fff;border-bottom-right-radius:4px}.message.assistant .bubble{background:var(--surface);border:1px solid var(--line);box-shadow:0 1px 3px #0f172a0d;border-bottom-left-radius:4px}.message.user .bubble .content{white-space:pre-wrap;margin:0}.bubble .content.markdown{white-space:normal}.bubble .content.markdown>:first-child{margin-top:0}.bubble .content.markdown>:last-child{margin-bottom:0}.bubble .content.markdown p{margin:0 0 8px}.bubble .content.markdown p:last-child{margin-bottom:0}.bubble .content.markdown ul,.bubble .content.markdown ol{margin:4px 0 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p{color:var(--muted);max-width:520px;margin:0 auto 22px;line-height:1.7}.suggestions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.suggestions button{padding:9px 16px;border:1px solid #bfdbfe;border-radius:999px;background:var(--brand-soft);color:var(--brand-dark);font-size:14px;transition:all .15s}.suggestions button:hover{background:var(--brand);color:#fff;border-color:var(--brand)}.typing-bubble{display:inline-flex;align-items:center;gap:5px;padding:14px 18px;background:var(--surface);border:1px solid var(--line);border-bottom-left-radius:4px;box-shadow:0 1px 3px #0f172a0d}.typing-bubble span{width:8px;height:8px;border-radius:50%;background:#94a3b8;animation:bounce 1.2s infinite}.typing-bubble span:nth-child(2){animation-delay:.15s}.typing-bubble span:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-6px)}}.composer{display:flex;gap:10px;align-items:flex-end;max-width:760px;margin:0 auto;width:100%;padding:12px 24px 20px}.composer textarea{flex:1;resize:none;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);font-size:15px;outline:none;transition:border-color .15s}.composer textarea:focus{border-color:var(--brand)}.composer button{padding:12px 22px;border:none;border-radius:var(--radius);background:var(--brand);color:#fff;font-size:15px;transition:background .15s}.composer button:hover:not(:disabled){background:var(--brand-dark)}.composer button:disabled{background:#93c5fd;cursor:not-allowed}.panel{width:0;overflow:hidden;background:var(--surface);border-left:1px solid var(--line);transition:width .22s ease}.panel.open{width:340px;overflow-y:auto}.panel-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px 12px;position:sticky;top:0;background:var(--surface);border-bottom:1px solid var(--line)}.panel-head h2{margin:0;font-size:15px}.icon-btn{border:none;background:none;font-size:14px;color:var(--muted);padding:4px 8px;border-radius:6px}.icon-btn:hover{background:#f1f5f9;color:var(--text)}.panel-sec{padding:14px 18px;border-bottom:1px solid var(--line)}.panel-sec h3{margin:0 0 8px;font-size:13px;color:var(--muted)}.panel-sec input,.panel-sec textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:8px;margin-bottom:8px;font-size:13px;outline:none;background:#fff}.panel-sec input:focus,.panel-sec textarea:focus{border-color:var(--brand)}.stat{margin:0 0 8px;font-size:13px;color:var(--muted)}.stat strong{color:var(--text)}.stat .ok{color:var(--ok)}.stat .muted{color:var(--muted)}.inline{display:flex;gap:8px}.inline input{flex:1;margin-bottom:0}.inline button{padding:8px 14px;border:none;border-radius:8px;background:var(--brand);color:#fff;font-size:13px;white-space:nowrap}.inline 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var(--line);border-radius:8px;font-size:11px;white-space:pre-wrap;word-break:break-all;max-height:200px;overflow:auto}@media(max-width:900px){.panel{position:fixed;top:64px;right:0;bottom:0;width:0;border-left:1px solid var(--line);box-shadow:-8px 0 24px #0f172a1f;z-index:20}.panel.open{width:300px}.topbar{padding:10px 14px}.brand-mark{width:34px;height:34px}.brand-text h1{font-size:15px}.brand-text p{font-size:11px}.topbar-actions{gap:8px}.ghost-btn{padding:6px 10px;font-size:13px}.composer{padding:10px 14px 16px}}