:root{--primary: #2f6bff;--primary-dark: #1f55e0;--primary-light: #eaf1ff;--bg: #f5f7fb;--panel: #ffffff;--border: #e4e8f0;--text: #1f2937;--text-2: #6b7280;--text-3: #9ca3af;--green: #10b981;--green-light: #ecfdf5;--red: #ef4444;--red-light: #fef2f2;--orange: #f59e0b;--orange-light: #fffbeb;--radius: 10px;--shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 1px 2px rgba(16, 24, 40, .04);--shadow-lg: 0 10px 30px rgba(16, 24, 40, .1);--side-w: 240px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,PingFang SC,sans-serif;background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:14px}a{color:var(--primary);text-decoration:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;border-radius:8px;padding:8px 14px;font-size:14px;font-weight:500;transition:all .18s ease;white-space:nowrap}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-ghost{background:#fff;color:var(--text);border-color:var(--border)}.btn-ghost:hover{background:var(--bg)}.btn-danger{background:#fff;color:var(--red);border-color:#fecaca}.btn-danger:hover{background:var(--red-light)}.btn-sm{padding:5px 10px;font-size:13px;border-radius:6px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:disabled:hover{background:inherit}.input,.select,.textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:9px 12px;background:#fff;color:var(--text);outline:none;transition:border .18s ease,box-shadow .18s ease}.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.textarea{resize:vertical;min-height:80px}.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:20px;font-size:12px;font-weight:500}.badge-blue{background:var(--primary-light);color:var(--primary-dark)}.badge-green{background:var(--green-light);color:#047857}.badge-red{background:var(--red-light);color:#b91c1c}.badge-orange{background:var(--orange-light);color:#b45309}.badge-gray{background:#f3f4f6;color:var(--text-2)}.app-shell{display:flex;height:100%}.sidebar{width:var(--side-w);flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:18px 18px 14px;border-bottom:1px solid var(--border)}.sidebar-brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#7aa2ff);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}.sidebar-brand .t{font-weight:700;font-size:15px}.sidebar-brand .s{font-size:12px;color:var(--text-3)}.side-nav{flex:1;padding:10px 12px;overflow-y:auto}.side-group-title{font-size:12px;color:var(--text-3);padding:14px 8px 6px;font-weight:600;text-transform:uppercase;letter-spacing:.3px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--text-2);font-size:14px;cursor:pointer;transition:all .15s ease;margin-bottom:2px}.nav-item:hover{background:var(--bg);color:var(--text)}.nav-item.active{background:var(--primary-light);color:var(--primary-dark);font-weight:600}.nav-item .ic{width:18px;text-align:center}.side-foot{border-top:1px solid var(--border);padding:12px 16px;display:flex;align-items:center;justify-content:space-between}.user-chip{display:flex;align-items:center;gap:8px;min-width:0}.avatar{width:30px;height:30px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0}.user-chip .t{font-weight:500;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-chip .s{font-size:11px;color:var(--text-3)}.logout-btn{background:none;border:none;color:var(--text-3);font-size:18px;padding:4px;border-radius:6px}.logout-btn:hover{background:var(--bg);color:var(--red)}.chat-header-right{display:flex;align-items:center;gap:10px}.main{flex:1;overflow:hidden;display:flex;flex-direction:column}.page{padding:22px 26px;overflow-y:auto;height:100%}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.page-title{font-size:19px;font-weight:700}.page-sub{font-size:13px;color:var(--text-2);margin-top:3px}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.card-pad{padding:18px}.table-wrap{overflow-x:auto}.table{width:100%;border-collapse:collapse;font-size:14px}.table th{text-align:left;padding:11px 14px;background:#f9fafb;color:var(--text-2);font-weight:600;font-size:13px;border-bottom:1px solid var(--border);white-space:nowrap}.table td{padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:middle}.table tr:last-child td{border-bottom:none}.table tr:hover td{background:#fafbfe}.table .name{font-weight:500}.table .dim{color:var(--text-3);font-size:12px}.row-actions{display:flex;gap:6px}.empty{text-align:center;color:var(--text-3);padding:48px 20px}.empty .big{font-size:40px;margin-bottom:10px;opacity:.6}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}.modal{background:var(--panel);border-radius:14px;box-shadow:var(--shadow-lg);width:100%;max-width:460px;overflow:hidden;animation:pop .18s ease}.modal-lg{max-width:640px}@keyframes pop{0%{transform:scale(.96);opacity:0}to{transform:scale(1);opacity:1}}.modal-head{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:16px;font-weight:700}.modal-close{background:none;border:none;font-size:20px;color:var(--text-3)}.modal-body{padding:20px;max-height:70vh;overflow-y:auto}.modal-foot{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px}.form-item{margin-bottom:15px}.form-label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;font-weight:500}.check-group{display:flex;flex-wrap:wrap;gap:8px}.check-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:20px;padding:5px 12px;font-size:13px;cursor:pointer;-webkit-user-select:none;user-select:none;transition:all .15s ease}.check-chip.on{background:var(--primary-light);border-color:var(--primary);color:var(--primary-dark)}.check-chip input{display:none}.toast-wrap{position:fixed;top:20px;left:50%;transform:translate(-50%);z-index:200;display:flex;flex-direction:column;gap:8px}.toast{background:#111827;color:#fff;padding:10px 18px;border-radius:9px;font-size:14px;box-shadow:var(--shadow-lg);animation:slideDown .2s ease}.toast.ok{background:#065f46}.toast.err{background:#991b1b}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.spinner{width:20px;height:20px;border:2px solid var(--primary-light);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.conv-item{display:flex;flex-direction:column;gap:2px;padding:9px 12px;border-radius:8px;cursor:pointer;margin-bottom:2px}.conv-item:hover{background:var(--bg)}.conv-item.active{background:var(--primary-light)}.conv-item .ct{font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-item .cs{font-size:11px;color:var(--text-3)}.chat-screen{display:flex;height:100%}.chat-list{width:260px;flex-shrink:0;border-right:1px solid var(--border);background:var(--panel);display:flex;flex-direction:column}.chat-list-head{padding:14px 16px;border-bottom:1px solid var(--border)}.chat-main{flex:1;display:flex;flex-direction:column;background:var(--bg)}.chat-header{padding:14px 22px;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.chat-body{flex:1;overflow-y:auto;padding:24px 22px}.msg{max-width:76%;margin-bottom:18px;display:flex}.msg.user{margin-left:auto;justify-content:flex-end}.msg-bubble{padding:11px 15px;border-radius:13px;font-size:14px;line-height:1.65;white-space:pre-wrap;word-break:break-word}.msg.user .msg-bubble{background:var(--primary);color:#fff;border-bottom-right-radius:4px}.msg.assistant .msg-bubble{background:var(--panel);border:1px solid var(--border);border-bottom-left-radius:4px;box-shadow:var(--shadow)}.msg-role{font-size:11px;color:var(--text-3);margin-bottom:4px;display:flex;align-items:center;gap:5px}.msg.user .msg-role{justify-content:flex-end}.sources{margin-top:9px;background:var(--primary-light);border-radius:9px;padding:10px 12px}.sources-title{font-size:12px;color:var(--primary-dark);font-weight:600;margin-bottom:6px}.source-item{font-size:13px;color:var(--text);padding:5px 0;border-top:1px dashed #d4e2ff}.source-item:first-of-type{border-top:none}.source-item .fn{font-weight:500}.chat-input{padding:14px 22px;background:var(--panel);border-top:1px solid var(--border)}.chat-input-box{display:flex;gap:10px;align-items:flex-end}.chat-input textarea{flex:1;border:1px solid var(--border);border-radius:10px;padding:11px 14px;resize:none;font-size:14px;outline:none;background:#fff;max-height:140px}.chat-input textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.chat-input .send{width:44px;height:44px;border-radius:10px;background:var(--primary);color:#fff;border:none;font-size:16px;flex-shrink:0;display:flex;align-items:center;justify-content:center}.chat-input .send:hover{background:var(--primary-dark)}.chat-input .send:disabled{opacity:.5}.login-wrap{min-height:100%;display:flex}.login-left{flex:1.1;background:linear-gradient(150deg,var(--primary),#4a8bff 60%,#6aa4ff);color:#fff;display:flex;flex-direction:column;justify-content:center;padding:60px 70px}.login-left h1{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:16px}.login-left .sub{font-size:15px;opacity:.9;line-height:1.7;margin-bottom:36px;max-width:420px}.login-feats{display:flex;flex-direction:column;gap:14px}.login-feat{display:flex;align-items:center;gap:10px;font-size:14px;opacity:.95}.login-feat .dot{width:24px;height:24px;border-radius:7px;background:#fff3;display:flex;align-items:center;justify-content:center}.login-right{flex:1;display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-card{width:100%;max-width:380px;background:var(--panel);border-radius:16px;box-shadow:var(--shadow-lg);padding:34px 32px}.login-card h2{font-size:22px;font-weight:700;margin-bottom:6px}.login-card .tip{font-size:13px;color:var(--text-2);margin-bottom:24px}.tab-switch{display:flex;background:var(--bg);border-radius:9px;padding:4px;margin-bottom:20px}.tab-btn{flex:1;border:none;background:transparent;padding:8px;border-radius:7px;font-size:14px;color:var(--text-2);font-weight:500}.tab-btn.active{background:#fff;color:var(--primary-dark);box-shadow:var(--shadow);font-weight:600}.kb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}.kb-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);cursor:pointer;transition:all .16s ease}.kb-card:hover{border-color:var(--primary);box-shadow:0 4px 14px #2f6bff1f}.kb-card.active{border-color:var(--primary);background:var(--primary-light)}.kb-card-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:8px}.kb-card-name{font-weight:600;font-size:15px}.kb-fmt-tag{margin-left:8px;font-size:11px;font-weight:500;vertical-align:2px}.kb-card-desc{font-size:12px;color:var(--text-2);margin-bottom:12px;min-height:30px}.kb-card-foot{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-3)}.kb-card-ops{display:inline-flex;align-items:center;gap:6px}.kb-card-ops .btn{opacity:0;transition:opacity .15s ease;padding:1px 8px}.kb-card:hover .kb-card-ops .btn,.kb-card.active .kb-card-ops .btn{opacity:1}.kb-card-more{color:var(--text-3);font-size:15px;line-height:1}.upload-drop{border:2px dashed var(--border);border-radius:12px;padding:30px;text-align:center;color:var(--text-2);cursor:pointer;transition:all .18s ease}.upload-drop:hover,.upload-drop.over{border-color:var(--primary);background:var(--primary-light)}.flex{display:flex;align-items:center;gap:8px}.between{justify-content:space-between}.grow{flex:1}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.text-2{color:var(--text-2)}.text-3{color:var(--text-3)}.small{font-size:12px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:#d5d9e3;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#bcc3d2}