@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap";:root{--primary-gradient:linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 40%, #3b82f6 100%);--brand-blue-deep:#1e3a8a;--brand-blue:#1d4ed8;--brand-blue-light:#3b82f6;--accent-gradient:linear-gradient(135deg, #10b981 0%, #059669 100%);--accent-green:#10b981;--accent-green-hover:#059669;--accent-green-glow:#10b98133;--bg-base:#f8fafc;--card-bg:#fff;--text-primary:#111827;--text-secondary:#374151;--text-muted:#6b7280;--border-light:#e2e8f0;--border-focus:#3b82f6;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000000d, 0 2px 4px -1px #00000008;--shadow-lg:0 10px 15px -3px #0000000d, 0 4px 6px -2px #00000005;--shadow-premium:0 20px 25px -5px #00000014, 0 10px 10px -5px #0000000a;--shadow-glow:0 0 20px #3b82f626;--transition-fast:.15s ease;--transition-normal:.25s cubic-bezier(.4, 0, .2, 1);--border-radius-sm:8px;--border-radius-md:12px;--border-radius-lg:20px}[data-theme=dark]{--bg-base:#0f172a;--card-bg:#1e293b;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--border-light:#334155;--border-focus:#60a5fa;--shadow-sm:0 1px 2px 0 #00000080;--shadow-md:0 4px 6px -1px #0006, 0 2px 4px -1px #0003;--shadow-lg:0 10px 15px -3px #00000080, 0 4px 6px -2px #00000040;--shadow-premium:0 20px 25px -5px #0009, 0 10px 10px -5px #0000004d}@media (width<=1024px){.qa-page-wrapper{flex-direction:column!important}.qa-page-wrapper aside{width:100%!important}}.skill-markdown-answer blockquote{border-left:4px solid var(--brand-blue);color:var(--text-secondary);background:#3b82f60d;border-radius:0 6px 6px 0;margin:1rem 0;padding:.75rem 1.25rem}.skill-markdown-answer table{border-collapse:collapse;width:100%;margin:1.25rem 0;font-size:.9rem}.skill-markdown-answer th{background:var(--bg-base);color:var(--text-primary);text-align:left;border-bottom:2px solid var(--border-light);padding:.75rem 1rem;font-weight:600}.skill-markdown-answer td{border-bottom:1px solid var(--border-light);color:var(--text-secondary);padding:.75rem 1rem}.skill-markdown-answer tr:hover td{background:#3b82f605}.skill-markdown-answer code{color:var(--brand-blue);background:#94a3b826;border-radius:4px;padding:.15rem .4rem;font-family:Outfit,sans-serif;font-size:.9em}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-base);color:var(--text-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.5;overflow-x:hidden}.hero-header{background:var(--primary-gradient);color:#fff;box-shadow:var(--shadow-lg);padding:2.5rem 2rem 5rem;position:relative;overflow:hidden}.hero-header:before{content:"";opacity:.8;pointer-events:none;background-image:linear-gradient(#ffffff0d 1px,#0000 1px),linear-gradient(90deg,#ffffff0d 1px,#0000 1px);background-size:24px 24px;position:absolute;inset:0}.hero-header:after{content:"";background:linear-gradient(to top, var(--bg-base), transparent);pointer-events:none;height:40px;position:absolute;bottom:0;left:0;right:0}.header-container{z-index:1;justify-content:space-between;align-items:center;max-width:1400px;margin:0 auto;display:flex;position:relative}.header-title-area{align-items:center;gap:1rem;display:flex}.header-logo-svg{filter:drop-shadow(0 0 8px #fff6);width:48px;height:48px;animation:3s ease-in-out infinite logo-glow}.header-titles h1{letter-spacing:.5px;background:linear-gradient(135deg,#fff 0%,#e2e8f0 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:.5rem;font-family:Outfit,sans-serif;font-size:1.8rem;font-weight:800;display:flex}.header-titles p{color:#ffffffbf;margin-top:.1rem;font-size:.875rem}.nav-tabs{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:var(--border-radius-md);background:#ffffff14;border:1px solid #ffffff1f;gap:.25rem;padding:.35rem;display:flex}.nav-tab-btn{color:#fffc;border-radius:calc(var(--border-radius-md) - 4px);cursor:pointer;transition:var(--transition-fast);background:0 0;border:none;align-items:center;gap:.5rem;padding:.6rem 1.25rem;font-size:.95rem;font-weight:500;display:flex}.nav-tab-btn svg{width:18px;height:18px}.nav-tab-btn:hover{color:#fff;background:#ffffff0f}.nav-tab-btn.active{color:var(--brand-blue-deep);background:var(--card-bg);box-shadow:var(--shadow-md)}.main-wrapper{z-index:2;max-width:1600px;margin:-3.5rem auto 3rem;padding:0 1.25rem;position:relative}.glass-card{background:var(--card-bg);border-radius:var(--border-radius-md);border:1px solid var(--border-light);box-shadow:var(--shadow-md);transition:transform var(--transition-normal), box-shadow var(--transition-normal);padding:1.75rem}.glass-card:hover{box-shadow:var(--shadow-premium);transform:translateY(-2px)}.literature-grid{grid-template-columns:260px 1fr;align-items:start;gap:1.5rem;display:grid}.lit-sidebar{flex-direction:column;gap:1.25rem;display:flex}.sidebar-section-title{text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px;align-items:center;gap:.4rem;margin-bottom:.5rem;font-size:.875rem;font-weight:600;display:flex}.sidebar-section-title svg{width:16px;height:16px}.filter-group{flex-direction:column;gap:.5rem;display:flex}.filter-btn{text-align:left;border:1px solid var(--border-light);color:var(--text-secondary);border-radius:var(--border-radius-sm);cursor:pointer;transition:var(--transition-fast);background:0 0;justify-content:space-between;align-items:center;padding:.6rem .85rem;font-size:.875rem;font-weight:500;display:flex}.filter-btn:hover{background:#3b82f60d;border-color:#3b82f64d}.filter-btn.active{border-color:var(--brand-blue);color:var(--brand-blue);background:#1d4ed80f;font-weight:600}.filter-btn-count{background:var(--border-light);color:var(--text-muted);border-radius:20px;padding:.1rem .4rem;font-size:.75rem}.filter-btn.active .filter-btn-count{background:var(--brand-blue);color:#fff}.lit-content-area{flex-direction:column;gap:1.5rem;display:flex}.lit-header-bar{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding-bottom:1rem;display:flex}.lit-header-info{align-items:center;gap:.75rem;display:flex}.lit-header-info h2{color:var(--text-primary);font-size:1.25rem;font-weight:700}.lit-count-badge{background:var(--bg-base);color:var(--text-secondary);border-radius:20px;padding:.25rem .6rem;font-size:.8rem;font-weight:600}.sync-btn-cta{background:var(--accent-gradient);color:#fff;border-radius:var(--border-radius-sm);cursor:pointer;transition:var(--transition-fast);border:none;align-items:center;gap:.5rem;padding:.65rem 1.2rem;font-size:.875rem;font-weight:600;display:flex;box-shadow:0 4px 10px #10b98133}.sync-btn-cta:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 6px 14px #10b98159}.sync-btn-cta:active{transform:translateY(0)}.sync-btn-cta.syncing svg{animation:1.2s linear infinite rotate-sync}.lit-card{background:var(--card-bg);border:1px solid var(--border-light);border-radius:var(--border-radius-md);transition:var(--transition-normal);flex-direction:column;gap:.75rem;padding:1.5rem;display:flex}.lit-card:hover{box-shadow:var(--shadow-lg);border-color:#3b82f64d}.lit-card-top{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.lit-card-source-tag{background:var(--bg-base);color:#1e40af;border:1px var(--border-light);border-radius:4px;padding:.2rem .5rem;font-size:.75rem;font-weight:700}.lit-card-source-tag.pubmed{background:var(--bg-base);color:#9d174d;border:1px var(--border-light)}.lit-card-source-tag.wos{background:var(--bg-base);color:#92400e;border:1px var(--border-light)}.lit-card-title{color:var(--text-primary);cursor:pointer;transition:color var(--transition-fast);font-size:1.1rem;font-weight:700;line-height:1.4}.lit-card-title:hover{color:var(--brand-blue)}.lit-card-title-en{color:var(--text-muted);margin-top:.15rem;font-size:.9rem;font-style:italic}.lit-card-authors{color:var(--text-secondary);font-size:.85rem}.lit-card-meta{color:var(--text-muted);border:1px var(--border-light);border:1px var(--border-light);flex-wrap:wrap;gap:1rem;padding:.5rem 0;font-size:.8rem;display:flex}.lit-card-abstract{color:var(--text-secondary);background:var(--bg-base);border-left:3px solid var(--border-light);border-radius:6px;padding:.75rem 1rem;font-size:.875rem;line-height:1.6}.lit-card-tags{flex-wrap:wrap;gap:.4rem;display:flex}.lit-tag{background:var(--bg-base);color:var(--text-secondary);border-radius:4px;padding:.2rem .5rem;font-size:.75rem}.sync-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;background:#0f172a66;justify-content:center;align-items:center;animation:.2s ease-out fade-in;display:flex;position:fixed;inset:0}.sync-modal{background:var(--card-bg);border-radius:var(--border-radius-md);width:500px;max-width:90%;box-shadow:var(--shadow-premium);border:1px solid var(--border-light);flex-direction:column;display:flex;overflow:hidden}.sync-modal-header{background:var(--primary-gradient);color:#fff;justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;display:flex}.sync-modal-header h3{align-items:center;gap:.5rem;font-size:1.1rem;font-weight:700;display:flex}.sync-modal-body{flex-direction:column;gap:1rem;padding:1.5rem;display:flex}.sync-progress-container{align-items:center;gap:1rem;display:flex}.sync-progress-bar-bg{background:#e2e8f0;border-radius:10px;flex:1;height:8px;overflow:hidden}.sync-progress-bar-fill{background:var(--accent-gradient);border-radius:10px;width:0%;height:100%;transition:width .2s linear}.sync-percent{color:var(--accent-green-hover);text-align:right;width:35px;font-size:.875rem;font-weight:700}.sync-log-title{color:var(--text-muted);text-transform:uppercase;font-size:.8rem;font-weight:600}.sync-log-box{color:#38bdf8;scroll-behavior:smooth;background:#0f172a;border-radius:6px;flex-direction:column;gap:.4rem;height:180px;padding:1rem;font-family:Consolas,Courier New,monospace;font-size:.8rem;display:flex;overflow-y:auto}.sync-log-line{line-height:1.4}.sync-log-line.success{color:#4ade80}.sync-log-line.info{color:#e2e8f0}.sync-modal-footer{background:var(--bg-base);border-top:1px solid var(--border-light);justify-content:flex-end;padding:1rem 1.5rem;display:flex}.sync-close-btn{background:var(--card-bg);border:1px solid var(--border-light);color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast);border-radius:6px;padding:.5rem 1rem;font-weight:600}.sync-close-btn:hover{background:var(--bg-base);border-color:#cbd5e1}.sync-close-btn:disabled{opacity:.5;cursor:not-allowed}.qa-layout{flex-direction:column;gap:1.5rem;display:flex}.qa-control-panel{border-bottom:1px solid var(--border-light);flex-direction:column;gap:1.25rem;padding-bottom:1.5rem;display:flex}.qa-modes-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;display:flex}.qa-section-title{color:var(--text-primary);align-items:center;gap:.5rem;font-size:1.25rem;font-weight:700;display:flex}.qa-section-title svg{width:22px;height:22px;color:var(--brand-blue)}.toggle-switch-wrapper{background:var(--bg-base);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);transition:all var(--transition-fast);border-radius:30px;align-items:center;gap:.75rem;padding:.45rem 1.1rem;display:flex}.toggle-switch-wrapper:hover{background:var(--bg-base);border-color:#3b82f633}.switch-label-text{color:var(--text-muted);-webkit-user-select:none;user-select:none;transition:color var(--transition-fast);font-size:.9rem;font-weight:700}.switch-label-text.active{color:var(--brand-blue)}.ios-switch{cursor:pointer;width:44px;height:22px;display:inline-block;position:relative}.ios-switch input{opacity:0;width:0;height:0}.ios-switch-slider{background-color:#cbd5e1;border-radius:22px;transition:all .3s cubic-bezier(.4,0,.2,1);position:absolute;inset:0}.ios-switch-slider:before{content:"";background-color:#fff;border-radius:50%;width:16px;height:16px;transition:all .3s cubic-bezier(.4,0,.2,1);position:absolute;bottom:3px;left:3px;box-shadow:0 2px 4px #00000026}.ios-switch input:checked+.ios-switch-slider{background-color:var(--brand-blue)}.ios-switch input:checked+.ios-switch-slider:before{transform:translate(22px)}.qa-search-bar{gap:.75rem;display:flex;position:relative}.qa-search-input-wrapper{flex:1;position:relative}.qa-search-input{border:1.5px solid var(--border-light);border-radius:var(--border-radius-md);background:var(--card-bg);width:100%;color:var(--text-primary);transition:var(--transition-normal);box-shadow:var(--shadow-sm);padding:1rem 1.2rem 1rem 3rem;font-size:1rem}.qa-search-input:focus{border-color:var(--brand-blue);outline:none;box-shadow:0 0 0 3px #3b82f626}.qa-search-icon-decor{color:var(--text-muted);pointer-events:none;position:absolute;top:50%;left:1.1rem;transform:translateY(-50%)}.qa-search-btn-cta{background:var(--accent-gradient);color:#fff;border-radius:var(--border-radius-md);cursor:pointer;box-shadow:0 4px 14px var(--accent-green-glow);transition:var(--transition-normal);border:none;align-items:center;gap:.5rem;padding:0 2rem;font-size:1rem;font-weight:700;display:flex}.qa-search-btn-cta:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 6px 20px #10b98159}.qa-search-btn-cta:active{transform:translateY(0)}.qa-suggestions-row{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.qa-suggestions-label{color:var(--text-muted);font-size:.85rem;font-weight:600}.qa-suggestion-bubble{background:var(--bg-base);border:1px solid var(--border-light);color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast);border-radius:30px;padding:.4rem .85rem;font-size:.8rem;font-weight:500}.qa-suggestion-bubble:hover{color:var(--brand-blue);background:#1d4ed80d;border-color:#1d4ed84d;transform:translateY(-1px)}.qa-empty-state{text-align:center;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:1rem;padding:5rem 2rem;display:flex}.qa-empty-state svg{color:#cbd5e1;width:64px;height:64px}.qa-empty-state h3{color:var(--text-primary);font-size:1.25rem;font-weight:700}.qa-empty-state p{max-width:450px;font-size:.9rem}.skill-chat-container{flex-direction:column;gap:1.5rem;display:flex}.skill-engine-banner{background:var(--bg-base);border:1px var(--border-light);border-radius:var(--border-radius-md);justify-content:space-between;align-items:center;padding:.85rem 1.25rem;display:flex}.skill-engine-info{color:#6b21a8;align-items:center;gap:.5rem;font-size:.875rem;font-weight:700;display:flex}.skill-engine-info svg{width:20px;height:20px}.skill-engine-badge{background:var(--bg-base);border:1px var(--border-light);color:#7e22ce;border-radius:4px;padding:.15rem .5rem;font-size:.75rem;font-weight:600}.skill-engine-badge.streaming{color:var(--brand-blue-deep);background:#2563eb14;border:1px solid #2563eb29;animation:1.5s ease-in-out infinite alternate badge-pulse}@keyframes badge-pulse{0%{background:#2563eb1f;border-color:#2563eb66;box-shadow:0 0 #2563eb66}to{background:#2563eb0d;border-color:#2563eb1a;box-shadow:0 0 8px 2px #2563eb1a}}.stream-live-indicator{color:var(--brand-blue);align-items:center;gap:.5rem;margin-top:-.5rem;font-size:.85rem;font-weight:700;display:inline-flex}.stream-live-indicator span{background:var(--brand-blue);border-radius:999px;width:8px;height:8px;animation:1.2s ease-out infinite streamPulse;box-shadow:0 0 #2563eb59}@keyframes streamPulse{0%{opacity:1;box-shadow:0 0 #2563eb59}to{opacity:.35;box-shadow:0 0 0 10px #2563eb00}}.cot-accordion{border:1px var(--border-light);background:var(--card-bg);border-radius:var(--border-radius-md);box-shadow:var(--shadow-sm);overflow:hidden}.cot-header{background:var(--bg-base);cursor:pointer;transition:var(--transition-fast);border-bottom:1px solid #ebdfff;justify-content:space-between;align-items:center;padding:.85rem 1.25rem;display:flex}.cot-header:hover{background:#ede9fe}.cot-title{color:#7c3aed;align-items:center;gap:.5rem;font-size:.875rem;font-weight:700;display:flex}.cot-title svg{width:18px;height:18px}.cot-status{color:#9333ea;align-items:center;gap:.3rem;font-size:.8rem;font-weight:600;display:flex}.cot-body{background:var(--bg-base);border-top:none;flex-direction:column;gap:.75rem;padding:1.25rem;display:flex}.cot-step-card{border-left:2px solid #ddd6fe;gap:.85rem;padding-left:1rem;display:flex;position:relative}.cot-step-num{color:#fff;background:#a78bfa;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:18px;height:18px;margin-top:.2rem;font-size:.75rem;font-weight:800;display:flex}.cot-step-info{flex-direction:column;gap:.15rem;display:flex}.cot-step-title{color:#4c1d95;font-size:.85rem;font-weight:700}.cot-step-desc{color:#6b21a8;opacity:.85;font-size:.8rem}.skill-markdown-answer{background:var(--card-bg);border:1px solid var(--border-light);border-radius:var(--border-radius-md);box-shadow:var(--shadow-sm);color:var(--text-primary);padding:1.75rem;line-height:1.7}.skill-markdown-answer h3{color:var(--brand-blue-deep);border-bottom:1.5px solid #f1f5f9;align-items:center;gap:.4rem;margin-top:1.5rem;margin-bottom:.75rem;padding-bottom:.4rem;font-size:1.2rem;font-weight:700;display:flex}.skill-markdown-answer h3:first-of-type{margin-top:0}.skill-markdown-answer h2{color:var(--brand-blue-deep);margin-top:1.75rem;margin-bottom:.9rem;font-size:1.35rem;font-weight:800}.skill-markdown-answer h2:first-child{margin-top:0}.skill-markdown-answer p{color:var(--text-secondary);margin-bottom:1rem;font-size:.95rem}.skill-markdown-answer strong{color:var(--text-primary);font-weight:700}.skill-markdown-answer ul,.skill-markdown-answer ol{flex-direction:column;gap:.4rem;margin-bottom:1rem;margin-left:1.5rem;display:flex}.skill-markdown-answer li{color:var(--text-secondary);font-size:.95rem}.combined-dashboard{grid-template-columns:1fr 1fr;gap:1.5rem;display:grid}@media (width<=1024px){.combined-dashboard{grid-template-columns:1fr}}.combined-panel-col{flex-direction:column;gap:1.5rem;display:flex}.combined-section-card{background:var(--card-bg);border:1px solid var(--border-light);border-radius:var(--border-radius-md);box-shadow:var(--shadow-sm);flex-direction:column;gap:1rem;padding:1.5rem;display:flex}.combined-card-header{border:1px var(--border-light);justify-content:space-between;align-items:center;padding-bottom:.75rem;display:flex}.combined-card-header-title{color:var(--text-primary);align-items:center;gap:.5rem;font-size:1rem;font-weight:700;display:flex}.combined-card-header-title svg{width:18px;height:18px;color:var(--brand-blue)}.combined-card-header-title.green svg{color:var(--accent-green-hover)}.combined-card-header-badge{background:var(--bg-base);color:var(--text-muted);border-radius:4px;padding:.2rem .5rem;font-size:.75rem;font-weight:600}.combined-textbook-meta{color:var(--brand-blue);background:var(--bg-base);border:1px solid #dbeafe;border-radius:4px;align-items:center;gap:.3rem;padding:.4rem .75rem;font-size:.8rem;font-weight:600;display:inline-flex}.combined-textbook-body{color:var(--text-secondary);max-height:380px;padding-right:.5rem;font-size:.925rem;line-height:1.65;overflow-y:auto}.combined-textbook-body h4{color:var(--text-primary);margin-top:1rem;margin-bottom:.4rem;font-size:.95rem;font-weight:700}.combined-textbook-body h4:first-of-type{margin-top:0}.combined-textbook-body p{margin-bottom:.75rem}.combined-textbook-body ul{flex-direction:column;gap:.3rem;margin-bottom:.75rem;margin-left:1.25rem;display:flex}.combined-literature-list{flex-direction:column;gap:.85rem;display:flex}.combined-lit-relation-card{background:var(--bg-base);border:1px solid var(--border-light);cursor:pointer;transition:var(--transition-fast);border-radius:8px;flex-direction:column;gap:.5rem;padding:1rem;display:flex}.combined-lit-relation-card:hover{background:var(--bg-base);border-color:#3b82f64d;transform:translate(2px)}.combined-lit-relation-title{color:var(--text-primary);font-size:.875rem;font-weight:700;line-height:1.4}.combined-lit-relation-desc{color:var(--text-secondary);border-left:2px solid var(--accent-green);padding-left:.5rem;font-size:.8rem;line-height:1.5}.combined-frontier-body{color:var(--text-secondary);font-size:.9rem;line-height:1.6}.combined-frontier-body h4{color:#1e293b;margin-bottom:.3rem;font-size:.95rem;font-weight:700}.combined-frontier-item{background:var(--bg-base);border:1px var(--border-light);border-radius:8px;margin-bottom:.75rem;padding:1rem}.combined-frontier-item:last-child{margin-bottom:0}.eval-dashboard{flex-direction:column;gap:1.5rem;display:flex}.eval-summary-grid{grid-template-columns:repeat(4,1fr);gap:1.25rem;display:grid}@media (width<=768px){.eval-summary-grid{grid-template-columns:repeat(2,1fr)}}.metric-card{background:var(--card-bg);border:1px solid var(--border-light);border-radius:var(--border-radius-md);box-shadow:var(--shadow-sm);transition:var(--transition-normal);align-items:center;gap:1rem;padding:1.25rem 1.5rem;display:flex}.metric-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.metric-icon-box{background:var(--bg-base);width:48px;height:48px;color:var(--brand-blue);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.metric-icon-box.green{color:var(--accent-green-hover);background:#ecfdf5}.metric-icon-box.purple{background:var(--bg-base);color:#7c3aed}.metric-icon-box.orange{background:var(--bg-base);color:#ea580c}.metric-icon-box svg{width:22px;height:22px}.metric-info{flex-direction:column;display:flex}.metric-value{color:var(--text-primary);font-size:1.6rem;font-weight:800;line-height:1.2}.metric-label{color:var(--text-muted);margin-top:.15rem;font-size:.8rem;font-weight:500}.eval-charts-row{grid-template-columns:1.2fr 1fr;gap:1.5rem;display:grid}@media (width<=1024px){.eval-charts-row{grid-template-columns:1fr}}.eval-card-header-row{border:1px var(--border-light);justify-content:space-between;align-items:center;margin-bottom:1.25rem;padding-bottom:.75rem;display:flex}.eval-card-title{color:var(--text-primary);align-items:center;gap:.5rem;font-size:1.1rem;font-weight:700;display:flex}.eval-card-title svg{width:18px;height:18px;color:var(--brand-blue)}.generate-report-btn{background:var(--accent-gradient);color:#fff;border-radius:var(--border-radius-sm);cursor:pointer;box-shadow:0 4px 10px var(--accent-green-glow);transition:var(--transition-fast);border:none;align-items:center;gap:.4rem;padding:.6rem 1.1rem;font-size:.85rem;font-weight:700;display:flex}.generate-report-btn:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 6px 14px #10b9814d}.chapters-scroll-box{flex-direction:column;gap:.95rem;max-height:400px;padding-right:.5rem;display:flex;overflow-y:auto}.chapter-progress-item{flex-direction:column;gap:.35rem;display:flex}.chapter-progress-label-row{color:var(--text-secondary);justify-content:space-between;font-size:.875rem;font-weight:600;display:flex}.chapter-progress-bar-bg{background:var(--bg-base);border-radius:10px;height:6px;overflow:hidden}.chapter-progress-bar-fill{background:var(--brand-blue-light);border-radius:10px;height:100%;transition:width .8s ease-out}.svg-chart-container{width:100%;height:250px;margin-top:1rem;position:relative}.svg-chart-axes{stroke:#e2e8f0;stroke-width:1px}.svg-chart-grid{stroke:#f1f5f9;stroke-dasharray:4 4}.svg-chart-line{stroke:var(--brand-blue);stroke-width:3.5px;fill:none;stroke-linecap:round}.svg-chart-area{fill:url(#chart-gradient);opacity:.2}.svg-chart-point{fill:var(--brand-blue);stroke:#fff;stroke-width:2px;cursor:pointer;transition:var(--transition-fast)}.svg-chart-point:hover{r:7px;fill:var(--accent-green)}.svg-chart-labels-x{fill:var(--text-muted);text-anchor:middle;font-size:.75rem;font-weight:500}.svg-chart-labels-y{fill:var(--text-muted);text-anchor:end;font-size:.75rem;font-weight:500}.activity-list{flex-direction:column;gap:.85rem;display:flex}.activity-item{border-left:2px solid #e2e8f0;gap:.75rem;padding-left:.85rem;display:flex;position:relative}.activity-item-dot{background:#cbd5e1;border-radius:50%;width:8px;height:8px;position:absolute;top:6px;left:-5px}.activity-item.search .activity-item-dot{background:#3b82f6}.activity-item.read .activity-item-dot{background:#a78bfa}.activity-item.sync .activity-item-dot{background:#10b981}.activity-item-info{flex-direction:column;gap:.1rem;display:flex}.activity-item-detail{color:var(--text-primary);font-size:.85rem;font-weight:500}.activity-item-time{color:var(--text-muted);font-size:.75rem}.report-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;background:#0f172a66;justify-content:center;align-items:center;animation:.2s ease-out fade-in;display:flex;position:fixed;inset:0}.report-modal{background:var(--card-bg);border-radius:var(--border-radius-md);width:750px;max-width:95%;max-height:88vh;box-shadow:var(--shadow-premium);border:1px solid var(--border-light);flex-direction:column;display:flex;overflow:hidden}.report-modal-header{background:var(--brand-blue-deep);color:#fff;justify-content:space-between;align-items:center;padding:1.25rem 1.75rem;display:flex}.report-modal-header h3{align-items:center;gap:.5rem;font-size:1.2rem;font-weight:700;display:flex}.report-modal-header h3 svg{width:22px;height:22px;color:var(--accent-green)}.report-modal-close{color:#fffc;cursor:pointer;transition:var(--transition-fast);background:0 0;border:none;align-items:center;padding:.2rem;display:flex}.report-modal-close:hover{color:#fff;transform:rotate(90deg)}.report-modal-close svg{width:20px;height:20px}.report-modal-body{flex-direction:column;gap:1.75rem;padding:2rem;display:flex;overflow-y:auto}.report-paper{background:var(--card-bg);border:1.5px solid #e2e8f0;border-radius:8px;padding:2.25rem;position:relative;box-shadow:0 4px 6px -1px #00000005}.report-paper-watermark{color:#10b98114;pointer-events:none;text-transform:uppercase;border:4px double #10b98126;border-radius:8px;padding:.2rem 1rem;font-family:Outfit,sans-serif;font-size:3.5rem;font-weight:900;position:absolute;top:2rem;right:2rem;transform:rotate(-12deg)}.report-paper-title{text-align:center;color:#0f172a;border-bottom:2px solid #0f172a;margin-bottom:1.5rem;padding-bottom:.75rem;font-size:1.5rem;font-weight:800}.report-student-meta{background:var(--bg-base);border:1px solid #e2e8f0;border-radius:6px;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.5rem;padding:.85rem 1.25rem;font-size:.875rem;display:grid}.report-student-meta-item{color:var(--text-secondary)}.report-student-meta-item strong{color:var(--text-primary);font-weight:700}.report-score-row{background:var(--bg-base);border:1px var(--border-light);border-radius:8px;align-items:center;gap:2rem;margin-bottom:1.5rem;padding:1.25rem 1.5rem;display:flex}.report-score-badge{background:var(--accent-gradient);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;font-family:Outfit,sans-serif;font-size:2rem;font-weight:800;display:flex;box-shadow:0 4px 10px #10b98140}.report-score-info h4{color:#14532d;font-size:1.05rem;font-weight:700}.report-score-info p{color:#15803d;margin-top:.15rem;font-size:.85rem}.report-section{flex-direction:column;gap:.65rem;margin-bottom:1.5rem;display:flex}.report-section:last-child{margin-bottom:0}.report-section-title{color:#0f172a;border-left:3.5px solid var(--brand-blue);align-items:center;gap:.4rem;padding-left:.5rem;font-size:.95rem;font-weight:700;display:flex}.report-section-title.red{border-left-color:#ef4444}.report-section-title.green{border-left-color:var(--accent-green)}.report-section-list{flex-direction:column;gap:.4rem;margin-left:1.25rem;display:flex}.report-section-list li{color:var(--text-secondary);font-size:.875rem;line-height:1.5}.report-modal-footer{background:var(--bg-base);border-top:1px solid var(--border-light);justify-content:flex-end;gap:.75rem;padding:1rem 1.75rem;display:flex}.report-print-btn{background:var(--brand-blue);color:#fff;cursor:pointer;transition:var(--transition-fast);border:none;border-radius:6px;align-items:center;gap:.4rem;padding:.55rem 1.25rem;font-weight:600;display:flex}.report-print-btn:hover{background:#1d4ed8}@keyframes rotate-sync{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes logo-glow{0%,to{filter:drop-shadow(0 0 4px #fff6)}50%{filter:drop-shadow(0 0 12px #fffc)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes sync-pulse{0%,to{opacity:1;box-shadow:0 0 0 4px #ffffff2e}50%{opacity:.6;box-shadow:0 0 0 8px #ffffff0d}}@media (width<=900px){.hero-header{padding:1.5rem 1rem 4rem}.header-container{flex-direction:column;align-items:flex-start;gap:1.25rem}.literature-grid{grid-template-columns:1fr}}.page-transition{animation:.4s cubic-bezier(.16,1,.3,1) forwards fade-in-up}@keyframes fade-in-up{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.smart-term{cursor:help;color:var(--brand-blue);border-bottom:1px dashed var(--brand-blue);font-weight:600;transition:all .2s;display:inline-block;position:relative}.smart-term:hover{color:var(--accent-green);border-bottom-color:var(--accent-green)}.smart-term:after{content:attr(data-tooltip);opacity:0;visibility:hidden;background:var(--card-bg);border:1px solid var(--border-light);color:var(--text-primary);white-space:nowrap;box-shadow:var(--shadow-lg);pointer-events:none;z-index:50;border-radius:6px;padding:.5rem .75rem;font-size:.8rem;font-weight:400;transition:all .2s cubic-bezier(.16,1,.3,1);position:absolute;bottom:100%;left:50%;transform:translate(-50%)translateY(10px)}.smart-term:hover:after{opacity:1;visibility:visible;transform:translate(-50%)translateY(-8px)}.zen-reading-overlay{background:var(--bg-base);z-index:9999;overscroll-behavior:contain;padding:1.5rem 1rem 4rem;animation:.3s ease-out forwards fade-in-up;display:block;position:fixed;inset:0;overflow-y:auto}.zen-reading-content{background:var(--card-bg);border:1px solid var(--border-light);width:100%;max-width:900px;min-height:auto;box-shadow:var(--shadow-premium);border-radius:8px;margin:0 auto;padding:2rem 2.25rem 3.5rem}.zen-reading-source{margin-bottom:1rem}.zen-reading-title{color:var(--text-primary);margin:0 0 .75rem;font-size:1.8rem;line-height:1.28}.zen-reading-subtitle{color:var(--text-muted);margin:0 0 1.25rem;font-size:1.1rem;font-style:italic;font-weight:400;line-height:1.45}.zen-reading-meta-panel{border-top:2px solid var(--border-light);border-bottom:1px solid var(--border-light);color:var(--text-secondary);margin-bottom:1.5rem;padding:.85rem 0}.zen-reading-meta-panel p{margin:0 0 .45rem}.zen-reading-meta-row{flex-wrap:wrap;gap:.45rem 1.25rem;font-size:.9rem;display:flex}.zen-reading-chapters{margin-top:.45rem;font-size:.85rem}.zen-reading-body{color:var(--text-primary);font-size:1rem;line-height:1.72}.zen-reading-body h3{color:var(--brand-blue);margin:0 0 .75rem}.zen-reading-body p{text-align:justify;text-indent:2em;margin:0}.zen-reading-actions{flex-wrap:wrap;justify-content:center;gap:.75rem;margin-top:1.5rem;margin-bottom:.5rem;display:flex}.zen-close-btn{background:var(--border-light);border:1px solid var(--border-light);cursor:pointer;width:44px;height:44px;color:var(--text-primary);z-index:10000;border-radius:50%;justify-content:center;align-items:center;transition:background .2s;display:flex;position:fixed;top:1.5rem;right:1.5rem}.zen-close-btn:hover{background:var(--text-muted);color:#fff}@media (width<=768px){.zen-reading-overlay{padding:.75rem .75rem 3rem}.zen-reading-content{padding:1.25rem 1rem 2.5rem}.zen-reading-title{padding-right:3rem;font-size:1.35rem}.zen-reading-subtitle{font-size:1rem}.zen-close-btn{top:1rem;right:1rem}}.skill-level-btn{background:var(--bg-base);border:1px solid var(--border-light);color:var(--text-secondary);cursor:pointer;text-align:left;border-radius:8px;padding:.75rem 1rem;transition:all .2s}.skill-level-btn.active{background:var(--bg-base);border:1px solid var(--border-light);color:var(--text-secondary);cursor:pointer;text-align:left;border-radius:8px;padding:.75rem 1rem;transition:all .2s}.skill-level-btn:hover{border-color:var(--brand-blue);background:#3b82f60d}.skill-level-btn.active{border-color:var(--brand-blue);color:var(--brand-blue-deep);box-shadow:0 0 0 1px var(--brand-blue);background:#3b82f61a}[data-theme=dark] .skill-level-btn.active{color:var(--brand-blue);background:#3b82f633}.qa-chat-wrapper{grid-template-columns:1fr 280px;align-items:stretch;gap:1.25rem;height:calc(100vh - 210px);min-height:600px;display:grid}@media (width<=1100px){.qa-chat-wrapper{grid-template-columns:1fr;height:auto;min-height:500px}}.qa-chat-main{background:var(--card-bg);border:1px solid var(--border-light);border-radius:var(--border-radius-md);height:100%;box-shadow:var(--shadow-lg);flex-direction:column;display:flex;position:relative;overflow:hidden}.qa-chat-main:before{content:"";z-index:1;background:linear-gradient(90deg,#1d4ed8,#7c3aed,#10b981,#1d4ed8) 0 0/200% 100%;height:3px;animation:4s infinite gradient-flow;position:absolute;top:0;left:0;right:0}@keyframes gradient-flow{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}.qa-chat-topbar{border-bottom:1px solid var(--border-light);background:var(--bg-base);flex-wrap:wrap;flex-shrink:0;justify-content:space-between;align-items:center;gap:1rem;margin-top:3px;padding:.85rem 1.5rem;display:flex}.qa-level-tabs{gap:.5rem;display:flex}.qa-level-tab{border:1.5px solid var(--border-light);color:var(--text-muted);cursor:pointer;white-space:nowrap;background:0 0;border-radius:30px;align-items:center;gap:.45rem;padding:.48rem 1.1rem;font-size:.83rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;position:relative;overflow:hidden}.qa-level-tab:after{content:"";opacity:0;background:radial-gradient(circle,#3b82f61f,#0000 70%);transition:opacity .2s;position:absolute;inset:0}.qa-level-tab:hover:not(:disabled):after{opacity:1}.qa-level-tab:hover:not(:disabled){border-color:var(--brand-blue);color:var(--brand-blue);transform:translateY(-1px);box-shadow:0 4px 12px #1d4ed81f}.qa-level-tab.active{border-color:var(--brand-blue);color:var(--brand-blue-deep);box-shadow:0 0 0 1px var(--brand-blue), 0 4px 12px #1d4ed826;background:linear-gradient(135deg,#1d4ed81a,#8b5cf60f)}.qa-level-tab:disabled{opacity:.5;cursor:not-allowed}.qa-level-sub{opacity:.6;margin-left:1px;font-size:.67rem;font-weight:500}.qa-level-dot{border-radius:50%;flex-shrink:0;width:7px;height:7px}.qa-level-dot[data-level=level1]{background:#3b82f6;box-shadow:0 0 4px #3b82f680}.qa-level-dot[data-level=level2]{background:#8b5cf6;box-shadow:0 0 4px #8b5cf680}.qa-level-dot[data-level=level3]{background:#10b981;box-shadow:0 0 4px #10b98180}.qa-clear-btn{border:1px solid var(--border-light);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:6px;align-items:center;gap:.4rem;padding:.38rem .85rem;font-size:.78rem;transition:all .18s;display:flex}.qa-clear-btn:hover{color:#ef4444;background:#fff5f5;border-color:#fecaca;transform:scale(.97)}.qa-messages-container{scroll-behavior:smooth;flex-direction:column;flex:1;gap:2rem;padding:2rem 2rem 1rem;display:flex;overflow-y:auto}.qa-messages-container::-webkit-scrollbar{width:5px}.qa-messages-container::-webkit-scrollbar-track{background:0 0}.qa-messages-container::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:10px}.qa-messages-container::-webkit-scrollbar-thumb:hover{background:#94a3b8}.qa-welcome-screen{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:1.4rem;height:100%;min-height:380px;padding:2rem;display:flex}.qa-welcome-icon{background:linear-gradient(135deg,#1d4ed826,#8b5cf626);border:2px solid #8b5cf640;border-radius:50%;justify-content:center;align-items:center;width:80px;height:80px;animation:3s ease-in-out infinite welcome-breathe;display:flex;position:relative;box-shadow:0 0 0 8px #8b5cf60f,0 0 0 16px #8b5cf608}.qa-welcome-icon:before{content:"";z-index:-1;background:conic-gradient(#1d4ed820,#7c3aed30,#10b98120,#1d4ed820);border-radius:50%;animation:6s linear infinite welcome-spin;position:absolute;inset:-4px}@keyframes welcome-breathe{0%,to{transform:translateY(0)scale(1);box-shadow:0 0 0 8px #8b5cf60f,0 0 0 16px #8b5cf608}50%{transform:translateY(-4px)scale(1.03);box-shadow:0 8px 24px #8b5cf62e,0 0 0 16px #8b5cf60d}}@keyframes welcome-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.qa-welcome-icon svg{color:#7c3aed;width:36px;height:36px}.qa-welcome-title{background:linear-gradient(135deg, var(--brand-blue-deep) 0%, #7c3aed 100%);-webkit-text-fill-color:transparent;letter-spacing:.3px;-webkit-background-clip:text;background-clip:text;font-family:Outfit,sans-serif;font-size:1.35rem;font-weight:800}.qa-welcome-desc{color:var(--text-muted);max-width:380px;font-size:.875rem;line-height:1.75}.qa-suggestions-grid{flex-direction:column;gap:.65rem;width:100%;max-width:500px;display:flex}.qa-suggestion-card{background:var(--bg-base);border:1px solid var(--border-light);color:var(--text-secondary);cursor:pointer;text-align:left;border-radius:10px;align-items:center;gap:.8rem;padding:.85rem 1.1rem;font-size:.875rem;transition:all .22s cubic-bezier(.4,0,.2,1);display:flex;position:relative;overflow:hidden}.qa-suggestion-card:before{content:"";opacity:0;background:linear-gradient(#1d4ed8,#7c3aed);border-radius:10px 0 0 10px;width:3px;transition:opacity .2s;position:absolute;top:0;bottom:0;left:0}.qa-suggestion-card:hover:before{opacity:1}.qa-suggestion-card:hover{color:var(--brand-blue);background:#1d4ed80a;border-color:#1d4ed84d;padding-left:1.4rem;transform:translate(5px);box-shadow:0 4px 16px #1d4ed81a}.chat-msg-row{align-items:flex-start;gap:1rem;animation:.3s cubic-bezier(.34,1.56,.64,1) both msg-slide-in;display:flex}.chat-msg-row.user{flex-direction:row-reverse;animation-name:msg-slide-in-right}@keyframes msg-slide-in{0%{opacity:0;transform:translate(-16px)translateY(8px)}to{opacity:1;transform:none}}@keyframes msg-slide-in-right{0%{opacity:0;transform:translate(16px)translateY(8px)}to{opacity:1;transform:none}}.chat-avatar{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;margin-top:4px;transition:transform .2s;display:flex}.chat-avatar:hover{transform:scale(1.1)}.ai-avatar{color:#fff;background:linear-gradient(135deg,#1d4ed8,#7c3aed);animation:4s ease-in-out infinite ai-avatar-breathe;box-shadow:0 2px 10px #7c3aed59,0 0 0 3px #7c3aed1a}@keyframes ai-avatar-breathe{0%,to{box-shadow:0 2px 10px #7c3aed59,0 0 0 3px #7c3aed1a}50%{box-shadow:0 4px 18px #7c3aed80,0 0 0 5px #7c3aed0f}}.user-avatar{color:#fff;background:linear-gradient(135deg,#1e293b,#334155);box-shadow:0 2px 8px #0003}.chat-bubble-user{color:#fff;word-break:break-word;background:linear-gradient(135deg,#2563eb 0%,#1d4ed8 60%,#1e40af 100%);border-radius:20px 4px 20px 20px;max-width:70%;padding:.9rem 1.25rem;font-size:.93rem;line-height:1.65;transition:box-shadow .2s;position:relative;overflow:hidden;box-shadow:0 4px 16px #1d4ed847,0 1px 3px #0000001a}.chat-bubble-user:before{content:"";pointer-events:none;background:radial-gradient(circle at 30% 30%,#ffffff1f,#0000 60%);width:200%;height:200%;position:absolute;top:-50%;left:-50%}.chat-bubble-user:hover{box-shadow:0 6px 22px #1d4ed861,0 2px 6px #0000001f}.chat-bubble-ai-wrapper{flex-direction:column;flex:1;gap:.65rem;max-width:calc(100% - 52px);display:flex}.chat-ai-meta-row{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.chat-ai-level-badge{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid;border-radius:20px;align-items:center;padding:.22rem .65rem;font-size:.72rem;font-weight:600;display:inline-flex}.chat-streaming-badge{color:#2563eb;background:linear-gradient(135deg,#2563eb1a,#7c3aed12);border:1px solid #2563eb33;border-radius:20px;align-items:center;gap:.4rem;padding:.22rem .65rem;font-size:.72rem;font-weight:600;animation:1.4s infinite alternate badge-pulse;display:inline-flex}.chat-stopped-badge{color:var(--text-muted);background:var(--bg-base);border:1px solid var(--border-light);border-radius:20px;align-items:center;gap:.35rem;padding:.22rem .65rem;font-size:.72rem;font-weight:600;display:inline-flex}.chat-cot-accordion{background:linear-gradient(135deg,#faf5ff,#f5f3ff);border:1px solid #ddd6fe;border-radius:10px;transition:box-shadow .2s;overflow:hidden}.chat-cot-accordion:hover{box-shadow:0 2px 12px #8b5cf61f}[data-theme=dark] .chat-cot-accordion{background:#8b5cf612;border-color:#8b5cf633}.chat-cot-toggle{color:#6d28d9;cursor:pointer;letter-spacing:.2px;background:0 0;border:none;align-items:center;gap:.55rem;width:100%;padding:.65rem 1rem;font-size:.78rem;font-weight:700;transition:background .15s,color .15s;display:flex}.chat-cot-toggle:hover{color:#5b21b6;background:#8b5cf61a}.chat-cot-body{border-top:1px solid #ddd6fe;flex-direction:column;gap:.65rem;padding:.8rem 1.1rem;animation:.2s ease-out cot-expand;display:flex}@keyframes cot-expand{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}.chat-cot-step{align-items:flex-start;gap:.75rem;display:flex}.chat-cot-num{color:#fff;background:linear-gradient(135deg,#8b5cf6,#a78bfa);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;margin-top:1px;font-size:.68rem;font-weight:800;display:flex;box-shadow:0 1px 4px #8b5cf666}.chat-cot-step-title{color:#4c1d95;margin-bottom:.15rem;font-size:.79rem;font-weight:700}.chat-cot-step-desc{color:#6d28d9;opacity:.8;font-size:.75rem;line-height:1.55}.chat-bubble-ai{background:var(--card-bg);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);border-radius:4px 20px 20px;padding:1.15rem 1.5rem;transition:box-shadow .2s,border-color .2s;position:relative}.chat-bubble-ai:hover{box-shadow:var(--shadow-md);border-color:#8b5cf626}.chat-thinking-skeleton{flex-direction:column;gap:.7rem;padding:.4rem 0;display:flex}.chat-thinking-skeleton>div{background:linear-gradient(90deg, var(--border-light) 25%, #e2e8f099 50%, var(--border-light) 75%);background-size:200% 100%;border-radius:6px;animation:1.6s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.chat-cursor-blink{background:var(--brand-blue);vertical-align:text-bottom;border-radius:1px;width:2.5px;height:1.1em;margin-left:2px;animation:.75s step-end infinite blink-cursor;display:inline-block}@keyframes blink-cursor{0%,to{opacity:1}50%{opacity:0}}.chat-action-row{align-items:center;gap:.5rem;padding-top:.25rem;display:flex}.chat-action-btn{border:1px solid var(--border-light);background:var(--card-bg);color:var(--text-muted);cursor:pointer;border-radius:8px;align-items:center;gap:.4rem;padding:.35rem .85rem;font-size:.75rem;transition:all .18s;display:flex}.chat-action-btn:hover{background:var(--bg-base);color:var(--text-primary);border-color:#94a3b8;transform:translateY(-1px);box-shadow:0 2px 8px #0000000f}.chat-action-btn:active{transform:translateY(0)}.chat-action-btn.stop-btn{color:#dc2626;background:#fff5f5;border-color:#fca5a5}.chat-action-btn.stop-btn:hover{background:#fee2e2;box-shadow:0 2px 8px #dc26261f}.qa-input-bar{border-top:1px solid var(--border-light);background:var(--card-bg);flex-direction:column;flex-shrink:0;gap:.55rem;padding:.85rem 1.5rem 1.1rem;display:flex;position:relative}.qa-input-bar:before{content:"";background:linear-gradient(to top, var(--card-bg), transparent);pointer-events:none;height:20px;position:absolute;top:-20px;left:0;right:0}.qa-stream-status{color:#2563eb;align-items:center;gap:.5rem;padding-bottom:.2rem;font-size:.76rem;font-weight:600;animation:.3s fade-in;display:flex}.qa-stream-dot{background:#2563eb;border-radius:50%;flex-shrink:0;width:8px;height:8px;animation:1.2s ease-out infinite streamPulse;display:inline-block}.qa-input-row{align-items:flex-end;gap:.75rem;display:flex}.qa-chat-textarea{border:1.5px solid var(--border-light);background:var(--bg-base);color:var(--text-primary);resize:none;border-radius:10px;flex:1;min-height:46px;max-height:160px;padding:.8rem 1.1rem;font-family:inherit;font-size:.935rem;line-height:1.6;transition:border-color .2s,box-shadow .2s,background .15s;overflow-y:auto}.qa-chat-textarea:focus{border-color:var(--brand-blue);background:var(--card-bg);outline:none;box-shadow:0 0 0 3.5px #2563eb21}.qa-chat-textarea:not(:disabled):not(:focus):hover{border-color:#94a3b8}.qa-chat-textarea:disabled{opacity:.6;cursor:not-allowed}.qa-send-btn{background:var(--accent-gradient);color:#fff;cursor:pointer;border:none;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:46px;height:46px;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:flex;position:relative;overflow:hidden;box-shadow:0 4px 14px #10b9814d}.qa-send-btn:after{content:"";opacity:0;background:radial-gradient(circle,#ffffff40,#0000 60%);transition:opacity .2s;position:absolute;inset:0}.qa-send-btn:hover:not(:disabled):after{opacity:1}.qa-send-btn:hover:not(:disabled){transform:translateY(-2px)scale(1.05);box-shadow:0 8px 22px #10b98166}.qa-send-btn:active:not(:disabled){transform:translateY(0)scale(.97)}.qa-send-btn:not(:disabled):not(.stop){animation:3s ease-in-out infinite send-ready-pulse}@keyframes send-ready-pulse{0%,to{box-shadow:0 4px 14px #10b9814d}50%{box-shadow:0 6px 20px #10b98173}}.qa-send-btn:disabled{box-shadow:none;cursor:not-allowed;opacity:.75;background:linear-gradient(135deg,#e2e8f0,#cbd5e1);animation:none}.qa-send-btn.stop{background:linear-gradient(135deg,#ef4444,#dc2626);animation:none;box-shadow:0 4px 14px #ef44444d}.qa-send-btn.stop:hover{transform:translateY(-2px)scale(1.05);box-shadow:0 8px 22px #ef444466}.qa-input-hint{color:var(--text-muted);text-align:right;font-size:.68rem}.qa-input-hint kbd{background:var(--bg-base);border:1px solid var(--border-light);box-shadow:0 1px 0 var(--border-light);border-radius:4px;padding:.1rem .35rem;font-family:inherit;font-size:.65rem}.qa-chat-sidebar{flex-direction:column;gap:1rem;max-height:calc(100vh - 180px);display:flex;position:sticky;top:1rem;overflow-y:auto}.qa-sidebar-card{padding:1.1rem 1.2rem}.qa-sidebar-title{color:var(--text-primary);text-transform:uppercase;letter-spacing:.4px;align-items:center;gap:.4rem;margin-bottom:.85rem;font-size:.8rem;font-weight:700;display:flex}.qa-sidebar-level-item{cursor:pointer;transition:var(--transition-fast);border:1px solid #0000;border-radius:8px;margin-bottom:.4rem;padding:.6rem .75rem}.qa-sidebar-level-item:hover{background:var(--bg-base);border-color:var(--border-light)}.qa-sidebar-level-item.active{background:#1d4ed80d;border-color:#1d4ed833}.qa-sidebar-level-header{align-items:center;gap:.45rem;margin-bottom:.3rem;display:flex}.qa-sidebar-level-badge{color:var(--text-muted);background:var(--bg-base);border:1px solid var(--border-light);border-radius:10px;margin-left:auto;padding:.1rem .4rem;font-size:.65rem}.qa-sidebar-level-desc{color:var(--text-muted);font-size:.73rem;line-height:1.5}.qa-sidebar-chapter-item{border-bottom:1px dashed var(--border-light);padding:.6rem 0}.qa-sidebar-chapter-item:last-child{border-bottom:none}.qa-sidebar-chapter-name{color:var(--brand-blue-deep);font-size:.78rem;font-weight:600}.qa-sidebar-lit-item{border-bottom:1px dashed var(--border-light);padding:.55rem 0}.qa-sidebar-lit-item:last-child{border-bottom:none}.qa-sidebar-lit-title{color:var(--text-primary);margin-bottom:.2rem;font-size:.76rem;font-weight:600;line-height:1.4}.qa-sidebar-lit-meta{color:var(--text-muted);font-size:.68rem}[data-theme=dark] .chat-bubble-user{background:linear-gradient(135deg,#2563eb,#1d4ed8)}[data-theme=dark] .chat-bubble-ai,[data-theme=dark] .qa-chat-topbar,[data-theme=dark] .qa-chat-textarea,[data-theme=dark] .qa-input-bar{background:var(--card-bg)}
