:root{--bg: #FFFFFF;--surface: #F5F5F7;--surface2: #FAFAFA;--border: #E5E5EA;--border2: #D1D1D6;--text: #1D1D1F;--text2: #86868B;--text3: #AEAEB2;--accent: #007AFF;--accent-bg: rgba(0,122,255,.08);--err: #FF3B30;--ok: #34C759;--warn: #FF9500;--shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.04);--shadow-lg: 0 8px 32px rgba(0,0,0,.1), 0 2px 8px rgba(0,0,0,.06);--radius: 12px;--radius-sm: 8px;--radius-lg: 16px;--font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.app{display:flex;height:100dvh;overflow:hidden}.sidebar{width:210px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:18px 14px 14px;border-bottom:1px solid var(--border)}.app-brand{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.3px}.icon-btn{width:30px;height:30px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;box-shadow:var(--shadow-sm)}.icon-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}.chat-list{flex:1;overflow-y:auto;padding:8px}.chat-list::-webkit-scrollbar{width:3px}.chat-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.chat-item{display:flex;align-items:center;gap:8px;padding:8px 10px;font-size:13px;color:var(--text2);border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .12s,color .12s;margin-bottom:1px}.chat-item:hover{background:var(--bg);color:var(--text);box-shadow:var(--shadow-sm)}.chat-item.active{background:var(--bg);color:var(--accent);box-shadow:var(--shadow-sm)}.sidebar-foot{padding:10px 12px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.sidebar-action{display:flex;align-items:center;gap:6px;background:none;border:none;color:var(--text2);font-size:13px;font-family:var(--font);cursor:pointer;padding:5px 7px;border-radius:var(--radius-sm);transition:color .12s,background .12s}.sidebar-action:hover{color:var(--text);background:var(--bg)}.conn-badge{font-size:12px;padding:2px 8px;background:var(--bg);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-sm)}.main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}.topbar{padding:13px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:#ffffffd9;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);flex-shrink:0;-webkit-app-region:drag;position:relative;z-index:10}.topbar-left,.topbar-right{display:flex;align-items:center;gap:8px;-webkit-app-region:no-drag}.model-label{font-size:12px;font-family:SF Mono,Fira Code,monospace;color:var(--text2);background:var(--surface);padding:3px 10px;border-radius:10px;border:1px solid var(--border)}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--ok)}.status-dot.loading{background:var(--warn);animation:pulse 1.5s infinite}.status-dot.err{background:var(--err)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.status-label{font-size:12px;color:var(--text2)}.messages{flex:1;overflow-y:auto;padding:24px 28px;display:flex;flex-direction:column;gap:16px;background:var(--bg)}.messages::-webkit-scrollbar{width:5px}.messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding-bottom:60px;gap:6px}.empty-ico{margin-bottom:6px}.empty-title{font-size:18px;font-weight:600;color:var(--text)}.empty-sub{font-size:13px;color:var(--text2)}.msg-row{display:flex;flex-direction:column;max-width:68%;animation:appear .18s ease}@keyframes appear{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.msg-row.user{align-self:flex-end;align-items:flex-end}.msg-row.assistant{align-self:flex-start;align-items:flex-start}.msg{display:flex;gap:10px;align-items:flex-start}.msg-row.user .msg{flex-direction:row-reverse}.msg-avatar{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0;font-family:var(--font)}.msg-row.user .msg-avatar{background:var(--accent);color:#fff}.msg-row.assistant .msg-avatar{background:var(--surface);border:1px solid var(--border);color:var(--text2)}.msg-content{display:flex;flex-direction:column;gap:4px;min-width:0}.bubble{padding:11px 15px;border-radius:var(--radius);font-size:15px;line-height:1.55;word-break:break-word}.msg-row.user .bubble{background:var(--accent);color:#fff;border-bottom-right-radius:4px}.msg-row.assistant .bubble{background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}.err-bubble{background:#ff3b300f;border:1px solid rgba(255,59,48,.2);color:var(--err);display:flex;align-items:flex-start;gap:6px}.loading-bubble{display:flex;align-items:center;gap:5px;padding:12px 16px}.ldot{width:6px;height:6px;background:var(--text3);border-radius:50%;animation:bounce 1.3s infinite}.ldot:nth-child(2){animation-delay:.2s}.ldot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0);opacity:.35}30%{transform:translateY(-5px);opacity:1}}.research-status{display:flex;align-items:center;gap:6px;color:var(--text2);font-size:13px}.pulse-dot{width:7px;height:7px;background:var(--accent);border-radius:50%;animation:pulse-ring 1.4s ease-out infinite;flex-shrink:0}@keyframes pulse-ring{0%{box-shadow:0 0 #007aff66}70%{box-shadow:0 0 0 6px #007aff00}to{box-shadow:0 0 #007aff00}}.msg-meta{font-size:11px;color:var(--text3);padding:0 2px;display:flex;align-items:center;gap:6px}.searched-tag{background:var(--accent-bg);color:var(--accent);padding:1px 6px;border-radius:8px;font-size:10px}.research-block{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;max-width:600px;box-shadow:var(--shadow-sm)}.research-hdr{display:flex;align-items:center;gap:6px;padding:9px 14px;font-size:12px;color:var(--accent);background:var(--accent-bg);border-bottom:1px solid var(--border);font-weight:500}.research-q{color:var(--text2);font-style:italic;flex:1}.src-count{background:var(--accent);color:#fff;font-size:10px;padding:2px 7px;border-radius:9px;font-weight:600}.ctx-chars{color:var(--text2);font-size:11px}.kw-list{display:flex;flex-wrap:wrap;gap:4px;margin-left:4px}.kw-tag{background:#007aff14;color:var(--accent);font-size:10px;padding:1px 6px;border-radius:6px;font-weight:400}.rel-badge{background:#34c7591a;color:var(--ok);font-size:10px;padding:1px 5px;border-radius:6px;margin-left:6px;font-weight:500}.sr-item{padding:11px 14px;border-bottom:1px solid var(--border)}.sr-item:last-child{border-bottom:none}.sr-title a{font-size:13px;color:var(--accent);text-decoration:none;font-weight:500}.sr-title a:hover{text-decoration:underline}.sr-snippet{font-size:12px;color:var(--text2);margin-top:3px;line-height:1.4}.sr-content{margin-top:6px}.sr-content summary{font-size:11px;color:var(--text3);cursor:pointer;-webkit-user-select:none;user-select:none;padding:2px 0}.sr-content summary:hover{color:var(--accent)}.sr-content-text{margin-top:6px;font-size:11px;color:var(--text2);line-height:1.5;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;max-height:180px;overflow-y:auto;white-space:pre-wrap;word-break:break-word}.input-area{padding:14px 20px 18px;background:var(--bg);border-top:1px solid var(--border);flex-shrink:0}.input-card{max-width:720px;margin:0 auto}.input-row{display:flex;gap:10px;align-items:flex-end}#chat-input{flex:1;padding:11px 15px;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:15px;font-family:var(--font);resize:none;outline:none;max-height:120px;transition:border-color .15s,box-shadow .15s}#chat-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg);background:var(--bg)}#chat-input::placeholder{color:var(--text3)}#chat-input:disabled{opacity:.5}.send-btn{width:40px;height:40px;background:var(--accent);border:none;border-radius:var(--radius);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:opacity .15s,transform .1s;box-shadow:var(--shadow-sm)}.send-btn:not(:disabled):hover{opacity:.88}.send-btn:not(:disabled):active{transform:scale(.94)}.send-btn:disabled{opacity:.3;cursor:not-allowed}.spin{width:15px;height:15px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}.input-foot{font-size:11px;color:var(--text3);margin-top:7px;text-align:center}.sheet-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:flex-end;justify-content:center;z-index:200}.settings-sheet{background:var(--bg);border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;max-width:540px;max-height:88dvh;overflow-y:auto;animation:sheetUp .3s cubic-bezier(.32,.72,0,1);box-shadow:var(--shadow-lg)}@keyframes sheetUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sheet-handle{width:36px;height:4px;background:var(--border2);border-radius:2px;margin:10px auto 0}.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px 10px;border-bottom:1px solid var(--border)}.sheet-head h2{font-size:17px;font-weight:600;color:var(--text)}.sheet-body{padding:16px 20px 32px}.field{margin-bottom:18px}.field-label{font-size:13px;font-weight:500;color:var(--text);margin-bottom:7px}.field input,.field textarea{width:100%;padding:10px 13px;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:14px;font-family:var(--font);outline:none;transition:border-color .15s,box-shadow .15s}.field input:focus,.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.field textarea{resize:vertical;min-height:64px}.seg{display:flex;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:3px;gap:3px}.seg button{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;background:none;border:none;border-radius:6px;color:var(--text2);font-size:14px;font-family:var(--font);font-weight:500;cursor:pointer;transition:all .15s}.seg button.on{background:var(--bg);color:var(--accent);box-shadow:var(--shadow-sm)}.test-btn{width:100%;padding:12px;background:var(--accent);border:none;border-radius:var(--radius-sm);color:#fff;font-size:15px;font-family:var(--font);font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:7px;margin-top:8px;transition:opacity .15s;box-shadow:var(--shadow-sm)}.test-btn:not(:disabled):hover{opacity:.88}.test-btn:disabled{opacity:.45;cursor:not-allowed}.test-msg{margin-top:10px;padding:10px 13px;border-radius:var(--radius-sm);font-size:13px}.test-msg.ok{background:#34c75914;border:1px solid rgba(52,199,89,.2);color:var(--ok)}.test-msg.err{background:#ff3b300f;border:1px solid rgba(255,59,48,.2);color:var(--err)}@media (max-width: 600px){.sidebar{display:none}.msg-row,.search-block{max-width:94%}.messages{padding:16px 14px}}.thinking-bubble{background:var(--surface)!important;border:1px solid var(--border)!important;padding:12px 16px!important;min-width:220px}.thinking-hdr{font-size:12px;color:var(--text-dim);margin-bottom:10px;display:flex;align-items:center;gap:6px}.thinking-time{font-size:11px;color:var(--text-dim);opacity:.6;margin-left:4px}.thinking-steps{display:flex;flex-direction:column;gap:5px}.think-step{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);transition:color .2s}.think-step.active{color:var(--accent)}.think-step.done{color:var(--ok, #34c759)}.think-step.done .step-text{text-decoration:line-through;opacity:.6}.step-icon{font-size:14px;flex-shrink:0;width:20px;text-align:center}.step-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}:root{--bg-primary: #ffffff;--bg-secondary: #f7f7f8;--bg-tertiary: #ececf1;--bg-sidebar: #f0f0f0;--text-primary: #1a1a1a;--text-secondary: #666666;--text-muted: #999999;--accent: #10a37f;--accent-hover: #0d8a6a;--border: #e5e5e5;--shadow: rgba(0,0,0,.06);--radius: 12px;--radius-sm: 8px;--user-bubble: #10a37f;--user-text: #ffffff}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);height:100vh;overflow:hidden}#app{height:100vh;display:flex;flex-direction:column}.app-layout{display:flex;height:100vh}.sidebar{width:260px;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:16px;border-bottom:1px solid var(--border)}.sidebar-header h1{font-size:18px;font-weight:700;color:var(--text-primary)}.sidebar-header span{font-size:11px;color:var(--text-muted);display:block;margin-top:2px}.new-chat-btn{display:flex;align-items:center;gap:8px;width:100%;padding:12px 16px;background:transparent;border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;font-size:14px;color:var(--text-primary);margin:12px 0;transition:background .15s}.new-chat-btn:hover{background:var(--bg-tertiary)}.chat-history{flex:1;overflow-y:auto;padding:8px}.history-item{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:2px;transition:background .15s}.history-item:hover{background:var(--bg-tertiary)}.history-item.active{background:var(--bg-tertiary);font-weight:500;color:var(--text-primary)}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border);font-size:11px;color:var(--text-muted)}.main{flex:1;display:flex;flex-direction:column;min-width:0}.header{padding:14px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:var(--bg-primary)}.header-title{font-size:15px;font-weight:600;color:var(--text-primary)}.header-model{font-size:12px;color:var(--text-muted);background:var(--bg-secondary);padding:4px 10px;border-radius:999px;border:1px solid var(--border)}.settings-btn{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 12px;font-size:12px;cursor:pointer;color:var(--text-secondary);transition:background .15s}.settings-btn:hover{background:var(--bg-tertiary)}.chat-area{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:20px;background:var(--bg-primary)}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);font-size:14px;gap:8px}.chat-empty .logo{font-size:48px;margin-bottom:8px}.message{display:flex;gap:14px;max-width:800px;width:100%;margin:0 auto;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message.user{flex-direction:row-reverse}.message-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;font-weight:700}.message.user .message-avatar{background:var(--user-bubble);color:#fff}.message.assistant .message-avatar{background:var(--bg-tertiary);color:var(--text-secondary)}.message-content{flex:1;min-width:0;padding-top:4px}.message.user .message-content{text-align:right}.bubble{display:inline-block;padding:10px 14px;border-radius:var(--radius);line-height:1.6;font-size:14px;white-space:pre-wrap;word-break:break-word;text-align:left}.message.user .bubble{background:var(--user-bubble);color:var(--user-text);border-bottom-right-radius:4px}.message.assistant .bubble{background:var(--bg-secondary);color:var(--text-primary);border-bottom-left-radius:4px}.message.error .bubble{background:#fef2f2;color:#dc2626;border:1px solid #fecaca;border-bottom-left-radius:4px}.message .meta{font-size:11px;color:var(--text-muted);margin-top:4px;padding:0 4px}.message.user .meta{text-align:right}.input-area{padding:16px 24px 20px;background:var(--bg-primary);border-top:1px solid var(--border)}.input-wrapper{max-width:800px;margin:0 auto;position:relative}.input-row{display:flex;gap:8px;align-items:flex-end;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px;transition:border-color .15s,box-shadow .15s}.input-row:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #10a37f1a}#chat-input{flex:1;background:transparent;border:none;outline:none;resize:none;font-size:14px;line-height:1.5;color:var(--text-primary);max-height:120px;font-family:inherit}#chat-input::placeholder{color:var(--text-muted)}.send-btn{background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);width:34px;height:34px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,transform .1s;flex-shrink:0;font-size:16px}.send-btn:hover{background:var(--accent-hover)}.send-btn:active{transform:scale(.95)}.send-btn:disabled{background:var(--bg-tertiary);cursor:not-allowed;transform:none}.hint{text-align:center;font-size:11px;color:var(--text-muted);margin-top:8px}.settings-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:100}.settings-panel{background:#fff;border-radius:var(--radius);padding:24px;width:400px;max-width:90vw;box-shadow:0 20px 60px #0003}.settings-panel h2{font-size:16px;font-weight:600;margin-bottom:20px}.settings-panel label{display:block;font-size:12px;font-weight:500;color:var(--text-secondary);margin-bottom:6px;margin-top:14px}.settings-panel input,.settings-panel select{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;background:var(--bg-secondary);color:var(--text-primary);outline:none;transition:border-color .15s}.settings-panel input:focus,.settings-panel select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #10a37f1a}.settings-panel .close-btn{float:right;background:none;border:none;font-size:20px;cursor:pointer;color:var(--text-muted);line-height:1}.settings-panel .close-btn:hover{color:var(--text-primary)}.settings-hint{font-size:11px;color:var(--text-muted);margin-top:4px}.loading-dots{display:inline-flex;gap:4px;padding:4px 0}.loading-dots span{width:6px;height:6px;background:var(--text-muted);border-radius:50%;animation:bounce 1.2s infinite}.loading-dots span:nth-child(2){animation-delay:.2s}.loading-dots span:nth-child(3){animation-delay:.4s}.search-card{background:#f9fafb;border:1px solid #e5e5e5;border-radius:14px;padding:14px 18px;max-width:780px;width:100%;margin:0 auto;animation:fadeIn .2s ease}.search-header{font-size:12px;font-weight:600;color:#666;margin-bottom:12px;display:flex;align-items:center;gap:6px}.search-result{margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid #e5e5e5}.search-result:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.search-result a{font-size:13px;font-weight:600;color:#1a0dab;text-decoration:none;display:block;margin-bottom:3px}.search-result a:hover{text-decoration:underline}.search-result p{font-size:12px;color:#4a4a4a;line-height:1.5;margin:0}.loading-bubble{display:flex;gap:5px;align-items:center;padding:12px 16px;background:var(--bg-secondary);border-radius:14px}.loading-dot{width:8px;height:8px;background:#999;border-radius:50%;animation:bounce 1.2s infinite;display:inline-block}.loading-dot:nth-child(2){animation-delay:.2s}.loading-dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:scale(.8);opacity:.5}40%{transform:scale(1.2);opacity:1}}.spinner{width:16px;height:16px;border:2px solid #ffffff40;border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 640px){.sidebar{display:none}.chat-area{padding:16px}.input-area{padding:12px 16px}.message{max-width:100%}}