*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:14px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{text-decoration:none;color:inherit}button{cursor:pointer;font-family:inherit}img{max-width:100%}input,select,textarea{font-family:inherit}:root{--primary: #1e3a5f;--primary-light: #2d5a8e;--primary-lighter: #4a7cbf;--accent: #c8a96e;--bg: #f0f2f5;--card: #ffffff;--text: #2c3e50;--text-light: #6c757d;--border: #dee2e6;--danger: #dc3545;--success: #28a745;--warning: #ffc107;--info: #17a2b8;--sidebar-width: 260px;--header-height: 60px;--radius: 8px;--shadow: 0 2px 8px rgba(0,0,0,.08);--shadow-md: 0 4px 16px rgba(0,0,0,.12)}.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);min-height:100vh;background:var(--primary);display:flex;flex-direction:column;position:fixed;left:0;top:0;z-index:100;transition:transform .3s ease}.main-content{margin-left:var(--sidebar-width);flex:1;display:flex;flex-direction:column;min-height:100vh}.page-content{padding:24px;flex:1}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.page-title{font-size:1.5rem;font-weight:600;color:var(--primary)}.sidebar-logo{padding:20px 16px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-logo-title{color:#fff;font-size:1rem;font-weight:600;line-height:1.3}.sidebar-logo-sub{color:#fff9;font-size:.8rem;margin-top:2px}.sidebar-nav{flex:1;overflow-y:auto;padding:8px 0}.nav-section-title{color:#fff6;font-size:.7rem;text-transform:uppercase;letter-spacing:1px;padding:12px 16px 4px}.nav-item a{display:flex;align-items:center;gap:10px;padding:10px 16px;color:#ffffffbf;font-size:.875rem;transition:all .2s;border-left:3px solid transparent}.nav-item a:hover{background:rgba(255,255,255,.08);color:#fff}.nav-item a.active{background:rgba(255,255,255,.12);color:#fff;border-left-color:var(--accent)}.nav-icon{font-size:1.1rem;width:20px;text-align:center}.sidebar-bottom{padding:16px;border-top:1px solid rgba(255,255,255,.1)}.top-header{height:var(--header-height);background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:50;box-shadow:var(--shadow)}.header-left{display:flex;align-items:center;gap:16px}.header-right{display:flex;align-items:center;gap:12px}.header-user{display:flex;align-items:center;gap:8px;font-size:.875rem}.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.875rem}.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;color:var(--text)}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:24px;overflow:hidden}.card-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.card-header h3{font-size:1rem;font-weight:600;color:var(--primary);margin:0}.card-body{padding:20px}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}.stat-card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:16px;border-left:4px solid var(--primary)}.stat-card.danger{border-left-color:var(--danger)}.stat-card.success{border-left-color:var(--success)}.stat-card.warning{border-left-color:var(--warning)}.stat-card.info{border-left-color:var(--info)}.stat-icon{font-size:2rem;opacity:.8}.stat-info{flex:1}.stat-value{font-size:2rem;font-weight:700;color:var(--primary);line-height:1}.stat-label{font-size:.8rem;color:var(--text-light);margin-top:4px}.table-responsive{overflow-x:auto}table.table{width:100%;border-collapse:collapse;font-size:.875rem}.table th{background:#f8f9fa;color:var(--text);font-weight:600;padding:12px 16px;text-align:left;border-bottom:2px solid var(--border);white-space:nowrap}.table td{padding:12px 16px;border-bottom:1px solid var(--border);vertical-align:middle}.table tbody tr:hover{background:#f8f9fa}.table-empty{text-align:center;padding:40px;color:var(--text-light)}.table img{width:40px;height:55px;object-fit:cover;border-radius:3px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-light)}.btn-secondary{background:#6c757d;color:#fff}.btn-secondary:hover:not(:disabled){background:#5a6268}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#c82333}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#218838}.btn-warning{background:var(--warning);color:#212529}.btn-warning:hover:not(:disabled){background:#e0a800}.btn-info{background:var(--info);color:#fff}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover:not(:disabled){background:#f8f9fa}.btn-sm{padding:5px 10px;font-size:.8rem}.btn-xs{padding:3px 8px;font-size:.75rem}.btn-block{width:100%;justify-content:center}.btn-group{display:flex;gap:6px;flex-wrap:nowrap;align-items:center}.btn-icon{padding:6px 8px}.form-group{margin-bottom:16px}.form-label{display:block;font-weight:500;margin-bottom:6px;font-size:.875rem;color:var(--text)}.form-label.required:after{content:" *";color:var(--danger)}.form-control{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:.875rem;transition:border-color .2s;background:#fff}.form-control:focus{outline:none;border-color:var(--primary-lighter);box-shadow:0 0 0 3px #4a7cbf26}.form-control:disabled{background:#f8f9fa;cursor:not-allowed}.form-select{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:.875rem;background:#fff;cursor:pointer}.form-select:focus{outline:none;border-color:var(--primary-lighter)}.form-text{font-size:.8rem;color:var(--text-light);margin-top:4px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}.form-check{display:flex;align-items:center;gap:8px}.form-check input[type=checkbox]{width:16px;height:16px;cursor:pointer}.invalid-feedback{color:var(--danger);font-size:.8rem;margin-top:4px}.form-control.is-invalid{border-color:var(--danger)}textarea.form-control{min-height:80px;resize:vertical}.toggle-switch{position:relative;display:inline-block;width:44px;height:24px}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:#ccc;transition:.4s;border-radius:24px}.toggle-slider:before{position:absolute;content:"";height:18px;width:18px;left:3px;bottom:3px;background-color:#fff;transition:.4s;border-radius:50%}input:checked+.toggle-slider{background-color:var(--success)}input:checked+.toggle-slider:before{transform:translate(20px)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.5);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}.modal{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);width:100%;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;animation:modalIn .2s ease}.modal-sm{max-width:400px}.modal-md{max-width:600px}.modal-lg{max-width:900px}.modal-xl{max-width:1100px}@keyframes modalIn{0%{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}.modal-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-shrink:0}.modal-header h3{font-size:1rem;font-weight:600;margin:0;color:var(--primary)}.modal-close{background:none;border:none;font-size:1.5rem;color:var(--text-light);line-height:1;cursor:pointer;padding:0 4px}.modal-close:hover{color:var(--text)}.modal-body{padding:20px;overflow-y:auto;flex:1}.modal-footer{padding:16px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px;flex-shrink:0}.warning-banner{background:#fff3cd;border:1px solid #ffc107;border-radius:6px;padding:10px 14px;margin-bottom:16px;font-size:.875rem;color:#856404;display:flex;align-items:center;gap:8px}.badge{display:inline-block;padding:3px 8px;border-radius:12px;font-size:.75rem;font-weight:500}.badge-primary{background:#d4e5ff;color:var(--primary)}.badge-success{background:#d4edda;color:#155724}.badge-danger{background:#f8d7da;color:#721c24}.badge-warning{background:#fff3cd;color:#856404}.badge-secondary{background:#e2e3e5;color:#383d41}.badge-info{background:#d1ecf1;color:#0c5460}.status-available{background:#d4edda;color:#155724}.status-borrowed{background:#d4e5ff;color:#004085}.status-overdue{background:#f8d7da;color:#721c24}.status-returned{background:#e2e3e5;color:#383d41}.status-reserved{background:#fff3cd;color:#856404}.status-lost,.status-blacklisted{background:#f8d7da;color:#721c24}.search-bar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px;align-items:center}.search-input-wrap{flex:1;min-width:200px;position:relative}.search-input-wrap .form-control{padding-left:36px}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-light)}.filter-group{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.pagination{display:flex;justify-content:center;align-items:center;gap:4px;margin-top:16px;flex-wrap:wrap}.page-info{font-size:.875rem;color:var(--text-light);margin:0 8px}.page-btn{padding:6px 10px;border:1px solid var(--border);background:#fff;border-radius:4px;cursor:pointer;font-size:.875rem;transition:all .2s}.page-btn:hover:not(:disabled){background:var(--primary);color:#fff;border-color:var(--primary)}.page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.page-btn:disabled{opacity:.4;cursor:not-allowed}.toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:8px;max-width:320px}.toast{padding:12px 16px;border-radius:8px;color:#fff;font-size:.875rem;box-shadow:var(--shadow-md);animation:toastIn .3s ease;display:flex;align-items:center;gap:8px;min-width:240px}.toast.leaving{animation:toastOut .3s ease forwards}@keyframes toastIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes toastOut{0%{transform:translate(0);opacity:1}to{transform:translate(100%);opacity:0}}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}.toast-warning{background:var(--warning);color:#212529}.toast-info{background:var(--info)}.loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(255,255,255,.7);z-index:9998;display:flex;align-items:center;justify-content:center}.spinner{width:40px;height:40px;border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-row td{text-align:center;padding:40px}.inline-spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.5);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;display:inline-block}.photo-upload{border:2px dashed var(--border);border-radius:8px;padding:20px;text-align:center;cursor:pointer;transition:border-color .2s}.photo-upload:hover{border-color:var(--primary-lighter)}.photo-upload.drag-over{border-color:var(--primary)!important;background:#f0f4ff}.photo-preview{width:100%;max-width:160px;margin:0 auto 12px}.photo-preview img{width:100%;height:auto;border-radius:6px;object-fit:cover}.photo-book-preview{width:80px;height:110px;object-fit:cover;border-radius:4px}.photo-member-preview{width:80px;height:80px;object-fit:cover;border-radius:50%}.lightbox-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.88);z-index:9999;display:flex;align-items:center;justify-content:center}.lightbox-content{position:relative;max-width:90vw;max-height:90vh;display:flex;flex-direction:column;align-items:center}.lightbox-close{position:absolute;top:-40px;right:0;background:rgba(255,255,255,.15);border:none;color:#fff;font-size:1.5rem;width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center}.lightbox-close:hover{background:rgba(255,255,255,.3)}.lightbox-img{max-width:90vw;max-height:80vh;border-radius:8px;object-fit:contain}.lightbox-caption{color:#ffffffd9;font-size:.9rem;margin-top:12px;text-align:center}.status-tabs{display:flex;gap:4px;margin-bottom:20px;border-bottom:2px solid var(--border);flex-wrap:wrap}.tab-btn{padding:8px 12px;border:none;background:none;cursor:pointer;font-size:.85rem;color:var(--text-light);border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s;white-space:nowrap}.tab-btn:hover{color:var(--primary)}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:500}.tab-count{display:inline-block;background:var(--bg);border-radius:10px;padding:1px 6px;font-size:.75rem;margin-left:4px}.showcase-page{background:#0a1628;min-height:100vh;color:#fff;overflow:hidden;position:relative}.showcase-header{display:flex;justify-content:space-between;align-items:center;padding:20px 40px;background:rgba(0,0,0,.3)}.showcase-lib-name{font-size:1.5rem;font-weight:600;color:var(--accent)}.showcase-clock{font-size:1.2rem;color:#ffffffb3}.showcase-content{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 80px);padding:40px}.showcase-book-card{display:flex;gap:60px;align-items:center;max-width:800px;animation:fadeIn 1s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.showcase-cover{width:240px;height:340px;object-fit:cover;border-radius:8px;box-shadow:0 20px 60px #00000080;flex-shrink:0}.showcase-cover-placeholder{width:240px;height:340px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:4rem;color:#ffffff4d;flex-shrink:0}.showcase-book-info{flex:1}.showcase-category{color:var(--accent);font-size:.9rem;text-transform:uppercase;letter-spacing:2px;margin-bottom:12px}.showcase-title{font-size:2rem;font-weight:700;line-height:1.3;margin-bottom:16px}.showcase-author{font-size:1.1rem;color:#ffffffb3;margin-bottom:24px}.showcase-intro{font-size:.95rem;color:#fff9;line-height:1.7;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.showcase-dots{display:flex;justify-content:center;gap:8px;position:absolute;bottom:30px;left:50%;transform:translate(-50%)}.showcase-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.3);transition:all .3s}.showcase-dot.active{background:var(--accent);transform:scale(1.3)}.showcase-ad{text-align:center;animation:fadeIn .8s ease}.showcase-ad-title{font-size:2.5rem;font-weight:700;color:var(--accent);margin-bottom:12px}.showcase-ad-subtitle{font-size:1.3rem;color:#fffc}.showcase-ad-image{max-height:70vh;max-width:100%;border-radius:12px}.member-layout{min-height:100vh;background:var(--bg)}.member-header{background:var(--primary);color:#fff;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:50}.member-header-title{font-weight:600;font-size:1.1rem}.member-content{padding:20px;max-width:600px;margin:0 auto}.member-nav{display:flex;justify-content:space-around;background:var(--card);border-top:1px solid var(--border);padding:8px 0;position:fixed;bottom:0;left:0;right:0;z-index:50}.member-nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 16px;color:var(--text-light);font-size:.75rem;cursor:pointer;border-radius:6px;transition:color .2s}.member-nav-item.active{color:var(--primary)}.member-nav-icon{font-size:1.3rem}.member-content-padded{padding-bottom:80px}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px}.book-grid-item{background:var(--card);border-radius:8px;overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:transform .2s}.book-grid-item:hover{transform:translateY(-4px)}.book-grid-cover{width:100%;aspect-ratio:2/3;object-fit:cover;background:var(--primary);display:flex;align-items:center;justify-content:center;font-size:2rem;color:#ffffff4d}.book-grid-info{padding:10px}.book-grid-title{font-size:.8rem;font-weight:500;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.login-page{min-height:100vh;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);display:flex;align-items:center;justify-content:center;padding:20px}.login-card{background:var(--card);border-radius:12px;padding:40px;width:100%;max-width:400px;box-shadow:var(--shadow-md)}.login-logo{text-align:center;margin-bottom:32px}.login-logo-icon{font-size:3rem;margin-bottom:8px}.login-title{font-size:1.5rem;font-weight:700;color:var(--primary)}.login-subtitle{color:var(--text-light);font-size:.875rem;margin-top:4px}.login-error{background:#f8d7da;color:#721c24;padding:10px 14px;border-radius:6px;margin-bottom:16px;font-size:.875rem}.preview-card{background:#f8f9fa;border:1px solid var(--border);border-radius:8px;padding:12px 16px;margin-top:8px;display:flex;gap:12px;align-items:center;font-size:.875rem}.preview-card img{width:50px;height:70px;object-fit:cover;border-radius:4px}.preview-info{flex:1}.preview-info .name{font-weight:600;margin-bottom:2px}.preview-info .sub{color:var(--text-light);font-size:.8rem}.settings-section{margin-bottom:32px}.settings-section-title{font-size:1rem;font-weight:600;color:var(--primary);padding:12px 0 8px;border-bottom:2px solid var(--border);margin-bottom:16px}.setting-row{display:flex;align-items:center;padding:12px 0;border-bottom:1px solid #f0f0f0;gap:16px}.setting-info{flex:1;min-width:0}.setting-key{font-size:.75rem;color:var(--text-light);font-family:monospace}.setting-desc{font-size:.875rem;font-weight:500;margin-bottom:2px}.setting-control{width:280px;flex-shrink:0}.tag-input{border:1px solid var(--border);border-radius:6px;padding:6px 8px;display:flex;flex-wrap:wrap;gap:4px;cursor:text;background:#fff}.tag-input:focus-within{border-color:var(--primary-lighter);box-shadow:0 0 0 3px #4a7cbf26}.tag{background:var(--primary);color:#fff;padding:2px 8px;border-radius:12px;font-size:.8rem;display:flex;align-items:center;gap:4px}.tag-remove{cursor:pointer;opacity:.7;font-size:.9rem}.tag-remove:hover{opacity:1}.tag-input input{border:none;outline:none;font-size:.875rem;min-width:80px;flex:1}.diff-view{font-family:monospace;font-size:.8rem;background:#f8f9fa;border-radius:6px;padding:12px;max-height:300px;overflow:auto}.diff-old{color:var(--danger)}.diff-new{color:var(--success)}.bar-chart{display:flex;gap:8px;align-items:flex-end;height:200px;padding:0 8px}.bar-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px}.bar{background:var(--primary);border-radius:4px 4px 0 0;min-width:20px;transition:height .5s ease;cursor:pointer}.bar:hover{background:var(--primary-light)}.bar-label{font-size:.7rem;color:var(--text-light);text-align:center}.bar-value{font-size:.75rem;font-weight:600;color:var(--text)}@media (max-width: 768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0);box-shadow:4px 0 20px #0000004d}.main-content{margin-left:0}.mobile-menu-btn{display:block}.page-content{padding:16px}.form-row,.form-row-3{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.sidebar-overlay{display:block!important}.setting-row{flex-direction:column;align-items:flex-start}.setting-control{width:100%}.showcase-book-card{flex-direction:column;gap:30px;text-align:center}.showcase-title{font-size:1.5rem}.table th,.table td{padding:8px 10px}}@media (max-width: 480px){.stats-grid{grid-template-columns:1fr}.search-bar{flex-direction:column}}.text-center{text-align:center}.text-right{text-align:right}.text-muted{color:var(--text-light)}.text-danger{color:var(--danger)}.text-success{color:var(--success)}.text-warning{color:var(--warning)}.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.d-flex{display:flex}.align-center{align-items:center}.justify-between{justify-content:space-between}.gap-1{gap:8px}.gap-2{gap:16px}.flex-1{flex:1}.w-100{width:100%}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.divider{border:none;border-top:1px solid var(--border);margin:16px 0}.section-empty{text-align:center;padding:60px 20px;color:var(--text-light)}.section-empty-icon{font-size:3rem;margin-bottom:12px;opacity:.5}