.app-layout{display:flex;min-height:100vh;flex-direction:row;background-color:var(--bg-primary)}.sidebar{position:fixed;left:0;top:0;height:100vh;z-index:1000;display:flex;flex-direction:column;align-items:center;background:var(--bg-secondary);border-right:1px solid var(--border-color);box-shadow:var(--shadow-md);transition:width .3s cubic-bezier(.4,0,.2,1),padding .3s cubic-bezier(.4,0,.2,1)}.sidebar.open{width:260px;padding:2rem 1.5rem}.sidebar.collapsed{width:80px;padding:1.5rem .75rem}.sidebar-header{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:3rem;gap:.5rem;transition:flex-direction .3s ease}.sidebar.collapsed .sidebar-header{flex-direction:column;gap:1rem}.logo{display:flex;flex-direction:column;align-items:center;gap:.5rem;font-size:1.2rem;font-weight:700;color:var(--text-primary);text-align:center}.logo-icon{font-size:2rem;color:var(--accent-primary);filter:drop-shadow(0 2px 4px var(--accent-glow))}.logo-text{font-size:.95rem;line-height:1.2;white-space:nowrap;color:var(--text-primary)}.sidebar.collapsed .logo-text{display:none}.toggle-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:8px;background:var(--bg-primary);color:var(--text-secondary);font-size:1.2rem;cursor:pointer;transition:all .2s ease;border:1px solid transparent;flex-shrink:0;order:-1}.toggle-btn:hover{background:#fff;color:var(--accent-primary);border-color:var(--border-color);box-shadow:var(--shadow-sm)}.sidebar.open .toggle-btn{order:1}.text-highlight{color:var(--accent-primary)}.nav-links{display:flex;flex-direction:column;gap:.5rem;width:100%;flex:1}.nav-link{display:flex;align-items:center;justify-content:flex-start;color:var(--text-secondary);font-weight:500;transition:all .2s ease;border-radius:var(--radius-sm);text-align:left;position:relative;gap:.75rem;white-space:nowrap;overflow:hidden}.sidebar.open .nav-link{padding:.75rem 1rem}.sidebar.collapsed .nav-link{padding:.75rem;justify-content:center;min-width:40px}.nav-icon{font-size:1.25rem;flex-shrink:0;color:var(--text-muted);transition:color .2s ease}.nav-text{overflow:hidden;text-overflow:ellipsis}.sidebar.collapsed .nav-text{display:none}.nav-link:hover{color:var(--text-primary);background:var(--bg-primary)}.nav-link:hover .nav-icon{color:var(--accent-primary)}.nav-link.active{color:var(--accent-primary);background:var(--accent-glow);font-weight:600}.nav-link.active .nav-icon{color:var(--accent-primary)}.nav-link.active:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:60%;background:var(--accent-primary);border-radius:0 4px 4px 0;opacity:0}.sidebar.open .nav-link.active:before{opacity:1}.btn-primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border-radius:var(--radius-sm);font-weight:600;transition:all .3s ease;box-shadow:var(--shadow-md);margin-top:auto;border:1px solid rgba(255,255,255,.1)}.sidebar.open .btn-primary{width:100%;padding:.8rem 1.5rem}.sidebar.collapsed .btn-primary{width:48px;height:48px;padding:0;display:flex;align-items:center;justify-content:center;font-size:1.2rem}.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg);filter:brightness(1.1)}.main-wrapper{flex:1;display:flex;flex-direction:column;min-height:100vh;transition:margin-left .3s cubic-bezier(.4,0,.2,1);min-width:0}.main-wrapper.sidebar-open{margin-left:260px}.main-wrapper.sidebar-collapsed{margin-left:80px}.main-content{flex:1;display:flex;flex-direction:column;max-width:1600px;margin:0 auto;width:100%}.footer{padding:2rem 0;text-align:center;color:var(--text-muted);border-top:1px solid var(--border-color);background:var(--bg-primary);flex-shrink:0;font-size:.9rem}@media(max-width:768px){.app-layout{flex-direction:column}.sidebar{position:sticky;width:100%;height:auto;flex-direction:row;align-items:center;justify-content:space-between;padding:1rem 1.5rem;border-right:none;border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.sidebar.open,.sidebar.collapsed{width:100%;padding:1rem 1.5rem}.sidebar-header{margin-bottom:0;width:auto;gap:1rem}.sidebar.collapsed .sidebar-header{flex-direction:row}.logo{flex-direction:row;gap:.75rem}.logo-icon{font-size:1.5rem}.logo-text{font-size:1rem;display:block!important}.toggle-btn{display:none}.nav-links{flex-direction:row;gap:1rem;flex:0;margin:0;justify-content:flex-end}.nav-link{padding:.5rem;background:transparent!important}.nav-text{display:none}.nav-link:before{display:none}.btn-primary{display:none}.main-wrapper.sidebar-open,.main-wrapper.sidebar-collapsed{margin-left:0}.main-content{padding-top:1rem}}.hero-upload-wrapper{display:flex;flex-wrap:wrap;gap:2rem;align-items:flex-start;padding:2rem;max-width:var(--container-width);margin:0 auto}.hero{display:block;flex:1 1 600px;min-height:auto;padding:0;min-width:0}.config-panel{padding:2.5rem;background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.config-panel:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary))}.config-grid{display:flex;flex-direction:column;gap:2rem;margin-bottom:2.5rem}.config-item label{display:block;font-size:.85rem;color:var(--text-secondary);margin-bottom:.75rem;font-weight:600;letter-spacing:.02em;text-transform:uppercase}.difficulty-selector{display:flex;background:var(--bg-primary);padding:.25rem;border-radius:var(--radius-sm);border:1px solid var(--border-color)}.diff-btn{flex:1;padding:.6rem 1rem;border-radius:6px;color:var(--text-secondary);font-size:.9rem;font-weight:500;transition:all var(--transition-fast);position:relative;z-index:1}.diff-btn:hover{color:var(--text-primary);background:#00000005}.diff-btn.active{background:#fff;color:var(--accent-primary);font-weight:600;box-shadow:var(--shadow-sm);border:1px solid rgba(0,0,0,.04)}.focus-area-selector{width:100%;padding:.8rem 1rem;background-color:#fff;border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.95rem;outline:none;cursor:pointer;transition:all var(--transition-fast);appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 1rem center;background-size:16px}.focus-area-selector:hover{border-color:var(--border-highlight);background-color:var(--bg-primary)}.focus-area-selector:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.config-item input[type=range]{-webkit-appearance:none;width:100%;height:6px;background:var(--border-color);border-radius:3px;outline:none;transition:background .3s;margin-top:.5rem}.config-item input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;background:#fff;border:2px solid var(--accent-primary);border-radius:50%;cursor:pointer;box-shadow:0 2px 4px #0000001a;transition:transform .2s,box-shadow .2s}.config-item input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.1);box-shadow:0 0 0 4px var(--accent-glow)}.custom-focus-section{margin-top:0;margin-bottom:2.5rem;padding:1.5rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);box-shadow:none}.custom-focus-section .section-header h3{font-size:1rem;color:var(--text-primary);margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.custom-focus-section .section-desc{font-size:.85rem;color:var(--text-muted);margin-bottom:1rem}.custom-focus-textarea{width:100%;padding:1rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:#fff;font-family:inherit;font-size:.95rem;line-height:1.5;resize:vertical;transition:border-color .2s,box-shadow .2s}.custom-focus-textarea:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.textarea-tips{margin-top:.75rem;font-size:.8rem;color:var(--text-muted);display:flex;justify-content:space-between}.generate-btn{width:100%;padding:1rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;font-size:1.1rem;font-weight:600;border-radius:var(--radius-sm);display:flex;justify-content:center;align-items:center;gap:.75rem;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 12px #4f46e533;text-shadow:0 1px 2px rgba(0,0,0,.1)}.generate-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 20px #4f46e54d;filter:brightness(1.05)}.generate-btn:active:not(:disabled){transform:translateY(0)}.generate-btn:disabled{opacity:.7;cursor:not-allowed;background:var(--text-muted);box-shadow:none}.generation-error,.generation-success{margin-top:1.5rem;padding:1rem 1.25rem;border-radius:var(--radius-sm);font-size:.9rem;display:flex;align-items:center;gap:.75rem;animation:slideIn .3s ease-out}.generation-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c}.generation-success{background:#f0fdf4;border:1px solid #bbf7d0;color:#15803d}@media(max-width:1024px){.hero-upload-wrapper{flex-direction:column;padding:1.5rem}.hero,.upload-section{width:100%;flex:auto}}.upload-section{flex:1 1 350px;display:flex;flex-direction:column;min-width:0}.upload-zone{background:#fff;border:2px dashed var(--border-color);border-radius:var(--radius-md);padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:360px;position:relative;overflow:hidden}.upload-zone:hover{border-color:var(--accent-primary);background-color:var(--bg-primary)}.upload-zone.dragging{border-color:var(--accent-primary);background-color:var(--accent-glow);transform:scale(1.01)}.upload-icon{font-size:3.5rem;color:var(--accent-light);margin-bottom:1.5rem;transition:transform .3s ease}.upload-zone:hover .upload-icon{transform:translateY(-5px) scale(1.05);color:var(--accent-primary)}.upload-zone h3{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.upload-hint{color:var(--text-muted);font-size:.9rem;margin-bottom:2rem;max-width:80%;line-height:1.5}.browse-btn{padding:.75rem 2rem;background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--accent-primary);font-weight:600;font-size:.95rem;transition:all .2s ease;box-shadow:var(--shadow-sm)}.browse-btn:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-md);transform:translateY(-1px)}.file-list{margin-top:1.5rem;display:flex;flex-direction:column;gap:.75rem;width:100%}.file-item{display:flex;align-items:center;padding:1rem;background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-sm);transition:all .2s ease;box-shadow:var(--shadow-sm);width:100%}.file-item:hover{border-color:var(--border-highlight);box-shadow:var(--shadow-md);transform:translate(2px)}.file-icon{font-size:1.5rem;margin-right:1rem;color:var(--accent-secondary);flex-shrink:0}.file-info{flex:1;display:flex;flex-direction:column;justify-content:center;overflow:hidden;min-width:0}.file-name{font-size:.95rem;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;margin-bottom:.25rem}.file-size{font-size:.8rem;color:var(--text-muted);display:block}.file-actions{display:flex;gap:.5rem;margin-left:1rem;flex-shrink:0}.preview-btn,.remove-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;color:var(--text-secondary);transition:all .2s;cursor:pointer}.preview-btn:hover{background-color:var(--bg-primary);color:var(--accent-primary)}.remove-btn:hover{background-color:#fef2f2;color:#ef4444}.upload-tabs{display:flex;gap:.5rem;margin-bottom:1rem;background:var(--bg-primary);padding:.25rem;border-radius:var(--radius-sm);border:1px solid var(--border-color)}.upload-tab{flex:1;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1rem;background:transparent;border:none;border-radius:6px;color:var(--text-secondary);font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s ease}.upload-tab:hover{color:var(--text-primary);background:#00000005}.upload-tab.active{background:#fff;color:var(--accent-primary);font-weight:600;box-shadow:var(--shadow-sm)}.tab-icon{font-size:1.1rem}.tab-text{font-size:.9rem}.video-upload-container{display:flex;flex-direction:column;gap:1.5rem}.video-url-section{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.5rem}.video-url-label{display:flex;align-items:center;gap:.5rem;font-size:.9rem;font-weight:600;color:var(--text-primary);margin-bottom:.75rem}.label-icon{font-size:1rem}.video-url-input-wrapper{position:relative;display:flex;align-items:center}.video-url-input{width:100%;padding:.875rem 2.5rem .875rem 1rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.95rem;font-family:inherit;color:var(--text-primary);background:var(--bg-primary);transition:all .2s ease}.video-url-input:focus{outline:none;border-color:var(--accent-primary);background:#fff;box-shadow:0 0 0 3px var(--accent-glow)}.video-url-input.valid{border-color:#22c55e;background:#f0fdf4}.video-url-input::placeholder{color:var(--text-muted)}.video-url-clear{position:absolute;right:.75rem;width:24px;height:24px;display:flex;align-items:center;justify-content:center;background:var(--border-color);color:var(--text-secondary);border:none;border-radius:50%;font-size:1rem;cursor:pointer;transition:all .2s}.video-url-clear:hover{background:#ef4444;color:#fff}.video-url-preview{display:flex;align-items:center;gap:.5rem;margin-top:.75rem;padding:.5rem .75rem;background:#f0fdf4;border-radius:6px;font-size:.85rem;color:#15803d}.preview-icon{font-weight:700}.video-divider{display:flex;align-items:center;gap:1rem;color:var(--text-muted);font-size:.85rem}.video-divider:before,.video-divider:after{content:"";flex:1;height:1px;background:var(--border-color)}.upload-zone.video-zone{min-height:200px;padding:2rem}.upload-zone.video-zone .upload-icon{font-size:3rem;margin-bottom:1rem}.upload-zone.video-zone h3{font-size:1.1rem}.video-file-list{margin-top:1rem}.video-item .file-icon{color:#7c3aed}@media(max-width:768px){.upload-tabs{gap:.25rem}.upload-tab{padding:.6rem .75rem;gap:.25rem}.tab-text{font-size:.8rem}.video-url-section{padding:1rem}.video-url-input{padding:.75rem 2.25rem .75rem .875rem;font-size:.9rem}.upload-zone.video-zone{min-height:160px;padding:1.5rem}}.modal-overlay{position:fixed;inset:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:2000;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease}.modal-content{width:90%;max-width:800px;max-height:90vh;background:var(--bg-secondary);border:1px solid var(--border-color);display:flex;flex-direction:column;box-shadow:0 20px 50px #0000004d;animation:slideUp .3s ease}.modal-header{padding:1rem 1.5rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-header h3{margin:0;font-size:1.1rem;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.close-btn{font-size:1.5rem;color:var(--text-muted);padding:.2rem .5rem;line-height:1;border-radius:4px;transition:var(--transition-fast)}.close-btn:hover{background:#0000000d;color:var(--text-primary)}.modal-body{flex:1;padding:1.5rem;overflow:auto;min-height:300px;display:flex;align-items:center;justify-content:center;background:#00000005}.preview-image{max-width:100%;max-height:70vh;object-fit:contain;border-radius:var(--radius-sm);box-shadow:var(--shadow-sm)}.preview-iframe{width:100%;height:70vh;border:none;border-radius:var(--radius-sm);background:#fff}.docx-preview-container{width:100%;height:70vh;background:#fff;padding:2rem;overflow:auto;border-radius:var(--radius-sm);color:#000}.doc-viewer-container{width:100%;height:70vh;background:#fff;border-radius:var(--radius-sm);overflow:hidden}.preview-placeholder{text-align:center;color:var(--text-secondary)}.placeholder-icon{font-size:4rem;margin-bottom:1rem;opacity:.5}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.workflow-timeline-wrapper{padding:1rem 2rem;animation:slideInUp .5s cubic-bezier(.4,0,.2,1);max-width:var(--container-width);margin:0 auto;width:100%}.workflow-timeline{padding:1.5rem 2rem;background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-md)}.timeline-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.header-title{display:flex;align-items:center;gap:.75rem}.title-icon{font-size:1.2rem;color:var(--accent-primary);animation:spin 3s linear infinite}.header-title h3{margin:0;font-size:1.1rem;font-weight:600;color:var(--text-primary)}.header-stats{display:flex;gap:.75rem;align-items:center}.stat-item{display:flex;align-items:center;gap:.5rem;padding:.4rem .8rem;border-radius:20px;background:var(--bg-primary);font-size:.85rem;font-weight:500;color:var(--text-secondary);border:1px solid transparent}.stat-item.completed{color:#15803d;background:#f0fdf4;border-color:#bbf7d0}.stat-item.running{color:var(--accent-primary);background:var(--accent-glow);border-color:#6366f133;animation:pulse 2s infinite}.timeline-container{display:flex;align-items:flex-start;justify-content:center;padding:1rem 0;min-height:120px;position:relative}.timeline-node{display:flex;flex-direction:column;align-items:center;gap:.75rem;min-width:120px;position:relative;z-index:2}.node-circle{width:3rem;height:3rem;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#fff;border:2px solid var(--border-color);transition:all .3s ease;box-shadow:var(--shadow-sm)}.node-icon{font-size:1.4rem;color:var(--text-muted);transition:color .3s}.timeline-node.status-completed .node-circle{border-color:#22c55e;background:#22c55e;color:#fff;box-shadow:0 4px 12px #22c55e4d}.timeline-node.status-completed .node-icon{color:#fff}.timeline-node.status-running .node-circle{border-color:var(--accent-primary);background:#fff;color:var(--accent-primary);box-shadow:0 0 0 4px var(--accent-glow);animation:pulse 2s infinite}.timeline-node.status-running .node-icon{color:var(--accent-primary)}.timeline-node.current .node-circle{transform:scale(1.1)}.node-details{display:flex;flex-direction:column;align-items:center;gap:.25rem;text-align:center}.node-name{font-size:.9rem;font-weight:600;color:var(--text-secondary)}.timeline-node.status-running .node-name,.timeline-node.status-completed .node-name{color:var(--text-primary)}.node-status-text{font-size:.75rem;color:var(--text-muted)}.timeline-node.status-running .node-status-text{color:var(--accent-primary);font-weight:500}.timeline-node.status-completed .node-status-text{color:#16a34a}.timeline-connector{flex:1;height:2px;background:var(--border-color);margin-top:1.5rem;position:relative;z-index:1;min-width:40px;max-width:100px}.connector-line{width:0%;height:100%;background:var(--accent-primary);transition:width .5s ease}.connector-line.status-completed{width:100%;background:#22c55e}.connector-line.status-running{width:50%;background:linear-gradient(90deg,#22c55e,var(--accent-primary))}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.8}}@media(max-width:768px){.workflow-timeline-wrapper,.workflow-timeline{padding:1rem}.timeline-container{overflow-x:auto;justify-content:flex-start;padding-bottom:1rem}.timeline-node{min-width:100px}}.exam-quality-panel{background:linear-gradient(135deg,#ffffff14,#ffffff0d);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:0 8px 32px #00000014}.quality-header{margin-bottom:1.5rem}.quality-header h4{margin:0;font-size:1.1rem;font-weight:600;color:var(--text-primary)}.quality-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem}.quality-item{display:flex;flex-direction:column}.quality-item h5{margin:0 0 1rem;font-size:.95rem;font-weight:600;color:var(--text-primary)}.question-types{display:flex;flex-direction:column;gap:.75rem}.type-row{display:flex;align-items:center;gap:.75rem}.type-label{min-width:40px;font-size:.85rem;font-weight:500;color:var(--text-secondary)}.type-bar{flex:1;height:8px;background:#f3f4f6;border-radius:4px;overflow:hidden}.type-fill{height:100%;border-radius:4px;transition:width .3s ease}.type-fill.single{background:linear-gradient(90deg,#3b82f6,#1d4ed8)}.type-fill.multiple{background:linear-gradient(90deg,#8b5cf6,#5b21b6)}.type-fill.fill{background:linear-gradient(90deg,#ec4899,#be185d)}.type-fill.short{background:linear-gradient(90deg,#f59e0b,#d97706)}.type-count{min-width:45px;text-align:right;font-size:.85rem;font-weight:600;color:var(--text-primary)}.difficulty-dist{display:flex;flex-direction:column;gap:.75rem}.difficulty-bar{display:flex;height:24px;border-radius:12px;overflow:hidden;box-shadow:0 2px 8px #0000001a}.diff-segment{transition:width .3s ease}.diff-segment.easy{background:linear-gradient(90deg,#10b981,#059669)}.diff-segment.medium{background:linear-gradient(90deg,#f59e0b,#d97706)}.diff-segment.hard{background:linear-gradient(90deg,#ef4444,#991b1b)}.difficulty-legend{display:flex;gap:.75rem;flex-wrap:wrap;font-size:.85rem}.legend-item{display:flex;align-items:center;gap:.35rem;color:var(--text-secondary)}.legend-color{width:12px;height:12px;border-radius:2px}.legend-color.easy{background:#10b981}.legend-color.medium{background:#f59e0b}.legend-color.hard{background:#ef4444}.time-estimate{display:flex;align-items:center;gap:1rem}.time-value{display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:.75rem 1rem;background:linear-gradient(135deg,#3b82f61a,#8b5cf61a);border-radius:8px;border:1px solid rgba(59,130,246,.2)}.time-number{font-size:1.75rem;font-weight:700;color:var(--accent-primary)}.time-unit{font-size:.75rem;color:var(--text-secondary);font-weight:500}.time-breakdown{flex:1;display:flex;flex-direction:column;gap:.35rem;font-size:.8rem;color:var(--text-secondary)}.time-item{padding:.25rem 0}.coverage-info{display:flex;align-items:center;gap:1rem}.coverage-badge{display:flex;align-items:center;justify-content:center;width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,#3b82f6,#8b5cf6);color:#fff;font-size:1.5rem;font-weight:700;box-shadow:0 4px 12px #3b82f64d}.coverage-details{flex:1;display:flex;flex-direction:column;gap:.5rem}.detail-row{display:flex;gap:.5rem;font-size:.9rem}.detail-row .label{color:var(--text-secondary);font-weight:500}.detail-row .value{color:var(--text-primary);font-weight:600;flex:1;text-align:right}@media(max-width:768px){.exam-quality-panel{padding:1rem;margin-bottom:1rem}.quality-grid{grid-template-columns:1fr;gap:1rem}.quality-item h5{font-size:.9rem;margin-bottom:.75rem}.time-estimate,.coverage-info{flex-direction:column;align-items:flex-start}.difficulty-legend{gap:.5rem}.legend-item{font-size:.8rem}}@media(max-width:480px){.quality-grid{grid-template-columns:1fr}.exam-quality-panel{padding:.75rem}.quality-item h5{font-size:.85rem}.type-label{min-width:35px;font-size:.8rem}.type-count{min-width:40px;font-size:.8rem}.coverage-badge{width:50px;height:50px;font-size:1.25rem}}.exam-paper-display{margin:3rem auto;padding:0 2rem;max-width:var(--container-width);width:100%;box-sizing:border-box}.exam-paper-display .section-header{text-align:center;margin-bottom:2.5rem}.exam-paper-display .section-header h2{font-size:2rem;font-weight:700;margin-bottom:.5rem;color:var(--text-primary)}.exam-paper-display .section-header p{font-size:1rem;color:var(--text-secondary)}.exam-paper-card{background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);overflow:hidden;border:1px solid var(--border-color);transition:transform .3s ease,box-shadow .3s ease}.exam-paper-card:hover{box-shadow:var(--shadow-xl)}.exam-paper-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2rem;background:var(--bg-primary);border-bottom:1px solid var(--border-color)}.paper-info{display:flex;align-items:center;gap:1rem}.paper-info h3{margin:0;font-size:1.25rem;font-weight:600;color:var(--text-primary)}.paper-badge{padding:.25rem .75rem;background:#dbeafe;color:var(--accent-dark);border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.answer-toggle{display:flex;align-items:center;gap:.75rem}.toggle-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-text{font-size:1.1rem;opacity:.5;transition:opacity .3s ease}.toggle-text.active{opacity:1}.toggle-input{display:none}.toggle-switch{position:relative;display:inline-block;width:50px;height:28px;background:#ccc;border-radius:14px;transition:background .3s ease;vertical-align:middle}.toggle-input:checked+.toggle-switch{background:var(--accent-primary)}.toggle-switch:after{content:"";position:absolute;width:24px;height:24px;border-radius:50%;background:#fff;top:2px;left:2px;transition:left .3s ease;box-shadow:0 2px 4px #0003}.toggle-input:checked+.toggle-switch:after{left:24px}.paper-actions{display:flex;gap:.75rem;align-items:center}.action-btn{padding:.5rem 1rem;font-size:.9rem;font-weight:500;border-radius:6px;cursor:pointer;display:flex;align-items:center;gap:.5rem;transition:all .2s;border:none}.action-btn:disabled{opacity:.6;cursor:not-allowed}.copy-btn{background:#fff;color:var(--text-secondary);border:1px solid var(--border-color)}.copy-btn:hover:not(:disabled){border-color:var(--accent-primary);color:var(--accent-primary);background:var(--bg-primary)}.dropdown-wrapper{position:relative;display:inline-block}.dropdown-toggle{background:var(--accent-primary);color:#fff;border:1px solid transparent}.dropdown-toggle:hover:not(:disabled){background:var(--accent-dark)}.dropdown-menu{display:none;position:absolute;top:100%;right:0;margin-top:.5rem;background:#fff;border:1px solid var(--border-color);border-radius:6px;box-shadow:0 4px 12px #00000026;min-width:180px;z-index:1000;overflow:hidden}.dropdown-wrapper:hover .dropdown-menu{display:block}.dropdown-item{display:block;width:100%;padding:.75rem 1rem;text-align:left;background:none;border:none;cursor:pointer;font-size:.9rem;color:var(--text-primary);transition:all .2s}.dropdown-item:hover:not(:disabled){background:var(--bg-primary);color:var(--accent-primary)}.dropdown-item:disabled{opacity:.6;cursor:not-allowed}.secondary-btn{background:#fff;color:var(--text-secondary);border:1px solid var(--border-color)}.secondary-btn:hover:not(:disabled){border-color:var(--accent-primary);color:var(--accent-primary);background:var(--bg-primary)}.exam-paper-content{padding:3rem;color:var(--text-primary);font-family:Times New Roman,SimSun,serif;line-height:1.8;max-height:800px;overflow-y:auto;background:#fff}.exam-line{min-height:1.8em;white-space:pre-wrap;word-wrap:break-word;font-size:1.1rem;margin-bottom:.25rem}.exam-line:has-text("【单选题】"),.exam-line:has-text("【多选题】"),.exam-line:has-text("【填空题】"),.exam-line:has-text("【判断题】"),.exam-line:has-text("【简答题】"){font-weight:700;font-size:1.3rem;color:var(--text-primary);margin-top:2rem;margin-bottom:1rem;border-bottom:2px solid var(--border-color);padding-bottom:.5rem;font-family:Inter,sans-serif}.exam-line.answer-line{background:#f0fdf4;padding:.5rem 1rem;border-left:4px solid #22c55e;margin:.5rem 0;border-radius:0 4px 4px 0;font-family:Inter,sans-serif;font-size:.95rem}.answer-highlight{color:#15803d;font-weight:600;margin-right:.5rem}.exam-paper-content::-webkit-scrollbar{width:8px}.exam-paper-content::-webkit-scrollbar-track{background:transparent}.exam-paper-content::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}.exam-paper-content::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.streaming-paper-container{margin-bottom:2rem}.streaming-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem;padding:1rem;background:#eff6ff;border:1px solid #dbeafe;border-radius:var(--radius-sm);color:var(--accent-dark)}.streaming-icon{animation:spin 2s linear infinite}.exam-paper-card.streaming{border:2px solid var(--accent-primary);box-shadow:0 0 0 4px var(--accent-glow)}@media(max-width:768px){.exam-paper-display{padding:0 1rem;margin:2rem auto}.exam-paper-header{flex-direction:column;align-items:flex-start;gap:1rem;padding:1rem}.paper-info{width:100%}.answer-toggle{width:100%;justify-content:space-between;padding:.75rem 0;border-bottom:1px solid var(--border-color)}.paper-actions{width:100%;flex-wrap:wrap}.action-btn{flex:1;min-width:120px;justify-content:center}.dropdown-wrapper{flex:1}.dropdown-menu{right:auto;left:0}.exam-paper-content{padding:1.5rem;font-size:1rem}}.textbooks-library{padding:2.5rem 2rem;width:100%;margin:0 auto;max-width:1600px}.search-box{margin-bottom:2rem;width:100%;max-width:600px}.modal-content{background:#fff;border-radius:var(--radius-md);padding:2rem;max-width:600px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-xl);animation:slideIn .3s cubic-bezier(.4,0,.2,1)}@keyframes slideIn{0%{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;margin-bottom:1.25rem}.form-group input,.form-group textarea{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.95rem;font-family:inherit;transition:all .2s ease;box-sizing:border-box;background:var(--bg-primary)}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--accent-primary);background:#fff;box-shadow:0 0 0 3px var(--accent-glow)}.textbooks-list{margin-bottom:2.5rem}.textbooks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;width:100%}.textbook-card{background:#fff;border-radius:var(--radius-sm);padding:1.5rem;border:1px solid var(--border-color);transition:all .3s ease;display:flex;flex-direction:column;height:100%;position:relative}.textbook-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--border-highlight)}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem;gap:1rem}.card-header h3{margin:0;font-size:1.1rem;color:var(--text-primary);flex:1;word-break:break-word;line-height:1.4;font-weight:600}.subject-tag{display:inline-block;background:var(--bg-primary);color:var(--accent-primary);padding:.25rem .75rem;border-radius:20px;font-size:.75rem;font-weight:600;white-space:nowrap;flex-shrink:0;border:1px solid rgba(99,102,241,.1)}.card-body{flex:1;margin-bottom:1.5rem;color:var(--text-secondary);font-size:.9rem}.card-body p{margin:.5rem 0;line-height:1.5}.card-body strong{color:var(--text-primary);font-weight:600}.description{color:var(--text-muted);font-size:.85rem;max-height:80px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}.library-stats{text-align:center;padding:1.5rem;background:var(--bg-primary);border-radius:var(--radius-sm);color:var(--text-secondary);border:1px solid var(--border-color)}.library-stats p{margin:0;font-size:.9rem}.library-stats strong{color:var(--accent-primary);font-size:1.1rem;margin:0 .25rem}@media(max-width:1024px){.textbooks-library{padding:2rem 1.5rem}.textbooks-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}}@media(max-width:768px){.textbooks-library{padding:1.5rem 1rem}.library-header{flex-direction:column;align-items:stretch;gap:1rem}.btn-add{width:100%;justify-content:center}.textbooks-grid,.form-row{grid-template-columns:1fr}}.questions-library{padding:2.5rem 2rem;width:100%;margin:0 auto;max-width:1600px}.library-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:2.5rem;flex-wrap:wrap;gap:1.5rem}.header-content h1{font-size:2rem;margin:0 0 .5rem;color:var(--text-primary);font-weight:700}.header-content p{font-size:1rem;color:var(--text-secondary);margin:0}.btn-add{padding:.75rem 1.5rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border:none;border-radius:var(--radius-sm);font-size:.95rem;cursor:pointer;transition:all .2s ease;font-weight:600;box-shadow:var(--shadow-md);display:flex;align-items:center;gap:.5rem}.btn-add:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);filter:brightness(1.1)}.filters-section{margin-bottom:2rem;display:flex;flex-direction:column;gap:1rem}.search-box{width:100%}.search-input{width:100%;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.95rem;transition:all .2s ease;background:#fff}.search-input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.filter-group{display:flex;gap:1rem;flex-wrap:wrap}.filter-select{padding:.6rem 1rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.9rem;cursor:pointer;transition:all .2s ease;background:#fff;min-width:140px;color:var(--text-primary)}.filter-select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.modal-overlay{position:fixed;inset:0;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:1100;padding:1.5rem}.modal-content{background:#fff;border-radius:var(--radius-md);padding:2rem;max-width:700px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-xl);animation:slideIn .3s cubic-bezier(.4,0,.2,1)}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.modal-content h2{margin:0 0 1.5rem;color:var(--text-primary);font-size:1.5rem;font-weight:600}.form-group{margin-bottom:1.25rem}.form-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin-bottom:1.25rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-secondary);font-size:.9rem}.form-group input,.form-group select,.form-group textarea{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.95rem;font-family:inherit;transition:all .2s ease;box-sizing:border-box;background:var(--bg-primary);color:var(--text-primary)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--accent-primary);background:#fff;box-shadow:0 0 0 3px var(--accent-glow)}.form-group textarea{resize:vertical;min-height:100px}.option-input{margin-bottom:.75rem!important}.form-actions{display:flex;gap:1rem;margin-top:2rem;justify-content:flex-end}.btn-submit,.btn-cancel{padding:.75rem 1.5rem;border:none;border-radius:var(--radius-sm);font-size:.95rem;cursor:pointer;font-weight:600;transition:all .2s ease}.btn-submit{background:var(--accent-primary);color:#fff}.btn-submit:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-cancel{background:var(--bg-primary);color:var(--text-secondary);border:1px solid var(--border-color)}.btn-cancel:hover{background:#f1f5f9;color:var(--text-primary)}.questions-list{margin-bottom:2.5rem}.questions-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.5rem;width:100%}.question-card{background:#fff;border-radius:var(--radius-sm);padding:1.5rem;border:1px solid var(--border-color);transition:all .3s ease;display:flex;flex-direction:column;height:100%}.question-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--border-highlight)}.card-header{margin-bottom:1rem}.question-meta{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}.type-tag,.subject-tag,.difficulty-tag{display:inline-block;padding:.25rem .75rem;border-radius:20px;font-size:.75rem;font-weight:600;white-space:nowrap}.type-tag{background:#f3e8ff;color:#7e22ce}.subject-tag{background:#e0f2fe;color:#0369a1}.difficulty-tag{background:var(--text-muted);color:#fff}.card-body{flex:1;margin-bottom:1.5rem}.question-content{font-size:.95rem;color:var(--text-primary);margin:0 0 1rem;line-height:1.6;font-weight:500}.options-preview{background:var(--bg-primary);padding:.75rem;border-radius:6px;margin-bottom:1rem;font-size:.85rem;color:var(--text-secondary);border:1px solid var(--border-color)}.options-preview p{margin:.25rem 0;line-height:1.4}.answer-section{padding:.75rem;background:#f0fdf4;border-radius:6px;border-left:3px solid #22c55e}.answer-section p{margin:.25rem 0;font-size:.85rem;color:#166534;line-height:1.4}.answer-section strong{color:#15803d}.explanation{font-size:.85rem;color:var(--text-muted);font-style:italic;margin-top:.5rem!important}.card-actions{display:flex;gap:.75rem}.btn-edit,.btn-delete{flex:1;padding:.5rem;border:none;border-radius:6px;cursor:pointer;font-size:.85rem;font-weight:600;transition:all .2s ease;display:flex;justify-content:center;align-items:center}.btn-edit{background:#f0f9ff;color:#0284c7}.btn-edit:hover{background:#e0f2fe}.btn-delete{background:#fef2f2;color:#dc2626}.btn-delete:hover{background:#fee2e2}.empty-state{text-align:center;padding:4rem 2rem;background:var(--bg-primary);border-radius:var(--radius-md);border:2px dashed var(--border-color)}.empty-icon{font-size:3rem;margin-bottom:1rem;opacity:.5}.empty-text{color:var(--text-muted);font-size:1rem;margin-bottom:1.5rem}.btn-add-empty{padding:.75rem 1.5rem;background:var(--accent-primary);color:#fff;border:none;border-radius:var(--radius-sm);cursor:pointer;font-weight:600;transition:all .2s ease}.btn-add-empty:hover{background:var(--accent-dark);transform:translateY(-1px)}@media(max-width:1024px){.questions-library{padding:2rem 1.5rem}.questions-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}}@media(max-width:768px){.questions-library{padding:1.5rem 1rem}.library-header{flex-direction:column;align-items:stretch;gap:1rem}.btn-add{width:100%;justify-content:center}.filters-section{gap:.75rem}.filter-group{flex-direction:column}.filter-select{width:100%}.questions-grid,.form-row{grid-template-columns:1fr}}:root{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-glass: rgba(255, 255, 255, .8);--bg-glass-hover: rgba(255, 255, 255, .95);--accent-primary: #6366f1;--accent-secondary: #4f46e5;--accent-light: #818cf8;--accent-dark: #4338ca;--accent-glow: rgba(99, 102, 241, .25);--accent-glow-strong: rgba(99, 102, 241, .4);--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--text-light: #f1f5f9;--border-color: #e2e8f0;--border-highlight: #cbd5e1;--border-accent: rgba(99, 102, 241, .5);--container-width: 1280px;--header-height: 80px;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-glow: 0 0 20px var(--accent-glow);--backdrop-blur: blur(12px);--backdrop-saturate: saturate(180%);--transition-fast: .2s cubic-bezier(.4, 0, .2, 1);--transition-smooth: .3s cubic-bezier(.4, 0, .2, 1);--transition-bounce: .5s cubic-bezier(.34, 1.56, .64, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,SF Pro Display,system-ui,-apple-system,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow-x:hidden;min-height:100vh;background-image:radial-gradient(circle at 15% 25%,rgba(99,102,241,.08) 0%,transparent 25%),radial-gradient(circle at 85% 75%,rgba(139,92,246,.08) 0%,transparent 25%);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit;text-decoration:none;transition:color var(--transition-fast)}button{border:none;background:none;cursor:pointer;font-family:inherit}.container{max-width:var(--container-width);margin:0 auto;padding:0 2rem}.glass-panel{background:var(--bg-glass);backdrop-filter:var(--backdrop-blur);-webkit-backdrop-filter:var(--backdrop-blur);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);transition:all var(--transition-smooth)}.glass-panel:hover{background:var(--bg-glass-hover);box-shadow:var(--shadow-xl);border-color:var(--border-highlight)}.text-gradient{background:linear-gradient(135deg,var(--text-primary) 0%,var(--text-secondary) 100%);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.text-gradient-accent{background:linear-gradient(135deg,var(--accent-primary) 0%,var(--accent-secondary) 100%);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn var(--transition-smooth) ease-out forwards}#dify-chatbot-bubble-button{position:fixed!important;bottom:24px!important;right:24px!important;z-index:9999!important}#dify-chatbot-bubble-window{position:fixed!important;bottom:36px!important;right:24px!important;z-index:9998!important;max-height:calc(100vh - 90px)!important}