:root{--bg:#f5f6f8;--card:#fff;--line:#e8eaed;--text:#1f2329;--sub:#8a9099;--brand:#3370ff;--soft:#eaf1ff;--ok:#20a66a;--warn:#d98716;--danger:#d64242}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font:14px -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}button,input,textarea{font:inherit}button{cursor:pointer}.app{height:100dvh;display:flex;flex-direction:column;overflow:hidden}header{height:56px;flex:none;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 16px;gap:10px}.logo{width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;flex:none}.title{font-size:15px;font-weight:600;min-width:0}.title small{display:block;color:var(--sub);font-size:11px;font-weight:400;margin-top:2px}.spacer{flex:1}.btn{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 11px;color:var(--text);white-space:nowrap}.btn:hover{background:#f5f7fa}.btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}.btn.primary:hover{background:#245edb}.btn:disabled{opacity:.55;cursor:default}.icon-btn{width:34px;height:34px;padding:0;display:grid;place-items:center}.layout{flex:1;display:flex;min-height:0}.chat{flex:1;display:flex;flex-direction:column;min-width:0}.messages{flex:1;overflow-y:auto;padding:18px 18px 10px}.msg{display:flex;gap:8px;margin-bottom:14px;align-items:flex-start}.msg.highlight{background:#fff7d6;border-radius:8px;padding:8px;margin-left:-8px}.avatar{width:32px;height:32px;flex:none;border-radius:9px;color:#fff;background:#3370ff;display:grid;place-items:center;font-weight:600}.msg:nth-child(4n+2) .avatar{background:#16a371}.msg:nth-child(4n+3) .avatar{background:#df8b28}.msg:nth-child(4n+4) .avatar{background:#9261aa}.bubble-wrap{max-width:min(80%,680px)}.name{font-size:12px;color:var(--sub);margin-bottom:4px}.bubble{background:#fff;border-radius:2px 12px 12px 12px;padding:9px 12px;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere;box-shadow:0 1px 2px #00000009}.msg.me{flex-direction:row-reverse}.me .name{text-align:right}.me .bubble{background:var(--brand);color:#fff;border-radius:12px 2px 12px 12px}.composer{background:#fff;border-top:1px solid var(--line);display:flex;align-items:end;gap:8px;padding:9px 12px}.composer textarea{height:42px;max-height:110px;resize:vertical;flex:1;border:1px solid var(--line);border-radius:9px;padding:10px 12px;outline:none}.composer textarea:focus,.field:focus{border-color:var(--brand)}.panel{width:350px;flex:none;display:flex;flex-direction:column;background:#fff;border-left:1px solid var(--line);min-height:0}.tabs{display:flex;border-bottom:1px solid var(--line);flex:none}.tab{flex:1;text-align:center;padding:13px 0;color:var(--sub);cursor:pointer;border-bottom:2px solid transparent}.tab.on{color:var(--brand);border-color:var(--brand)}.panel-body{padding:14px;overflow-y:auto;flex:1}.card{border:1px solid var(--line);border-radius:8px;padding:12px;margin-bottom:10px;background:#fff;line-height:1.55}.card .card-title{font-weight:600;margin-bottom:5px}.card .small{font-size:12px;color:var(--sub);margin-top:6px}.src{color:var(--brand);border:0;background:transparent;padding:0;margin:0 6px 0 0;font-size:12px}.tag{display:inline-block;color:#54606e;background:#f0f2f5;padding:2px 7px;border-radius:5px;font-size:11px;margin:4px 5px 0 0}.tag.warn{background:#fff3df;color:var(--warn)}.tag.ok{background:#e5f6ee;color:var(--ok)}.empty{color:var(--sub);text-align:center;padding:42px 10px}.muted{color:var(--sub)}.section-title{font-size:12px;font-weight:600;color:#5c6673;margin:14px 0 9px}.section-title:first-child{margin-top:2px}.auth-page{height:100dvh;display:grid;place-items:center;padding:16px}.auth-box{width:min(390px,100%);background:#fff;border:1px solid var(--line);padding:26px;border-radius:8px}.auth-box h1{font-size:20px;margin:15px 0 4px}.auth-box p{margin:0 0 18px;color:var(--sub)}.field{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px;margin-bottom:10px;outline:none}.full{width:100%}.link{border:0;background:none;color:var(--brand);padding:0;cursor:pointer}.auth-switch{display:block;margin:18px auto 0}.overlay{position:fixed;inset:0;background:#1d263566;display:grid;place-items:center;padding:14px;z-index:20}.dialog{width:min(700px,100%);max-height:min(85dvh,800px);overflow:auto;background:#fff;border-radius:8px;padding:20px}.dialog-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}.dialog-head h2{font-size:17px;margin:0}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}.list-row{padding:12px 2px;border-bottom:1px solid var(--line);cursor:pointer}.list-row:hover{background:#f8faff}.list-row b{display:block;margin-bottom:4px}.draft-editor{width:100%;height:240px;border:1px solid var(--line);border-radius:8px;padding:10px;resize:vertical;font-family:monospace;font-size:12px}.alert{color:var(--danger);font-size:12px;margin:8px 0}.mobile-toggle{display:none}@media(max-width:760px){header{padding:0 10px;gap:7px}.title{font-size:13px;max-width:38vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.title small{overflow:hidden;text-overflow:ellipsis}.desktop-label{display:none}.mobile-toggle{display:grid}.panel{position:fixed;left:0;right:0;bottom:0;width:auto;height:69dvh;border:0;border-top:1px solid var(--line);border-radius:12px 12px 0 0;box-shadow:0 -7px 25px #0002;transform:translateY(calc(100% - 52px));transition:transform .25s;z-index:5}.panel.open{transform:translateY(0)}.panel:before{content:"";width:36px;height:4px;border-radius:4px;background:#cfd5df;margin:7px auto 0}.tabs .tab{padding:9px 0}.messages{padding:14px 12px 60px}.bubble-wrap{max-width:82%}.composer{padding-bottom:calc(9px + env(safe-area-inset-bottom))}}