:root{--td-accent:#2e7cf6;--td-green:#10b981;--td-amber:#f59e0b;--td-red:#ef4444;--primary:var(--c-primary,#2563eb);--primary-dark:var(--c-primary-h,#1d4ed8);--primary-glow:rgba(37,99,235,.12);--surface:var(--surf,#ffffff);--surface2:var(--surf2,#f1f5f9);--border:var(--brd,rgba(15,23,42,.12));--td-card-border:rgba(15,23,42,.14);--txt-mid:var(--txt-2,#475569);--txt-low:var(--txt-3,#64748b)}html[data-theme="dark"]{--td-card-border:rgba(148,163,184,.22)}.page-main > .page-wrap.page-wrap-diagrams{margin-bottom:88px !important}@media (max-width:760px){.page-main > .page-wrap.page-wrap-diagrams{margin-bottom:56px !important}}.td-thumb img,.td-thumb video,#viewerCanvas img,.td-modal img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none;-webkit-touch-callout:none;pointer-events:none}.td-viewer{-webkit-user-select:none;user-select:none}.td-hero{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-bottom:28px;margin-top:16px}.td-hero-left h1{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:800;background:linear-gradient(135deg,var(--primary,#2c7be5),#0ea5e9);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}.td-hero-left p{color:var(--txt-mid);font-size:.92rem;margin-top:6px}.td-stats{display:flex;gap:12px;flex-wrap:wrap}.td-stat{background:var(--surface2);border:1px solid var(--border);border-radius:12px;padding:10px 18px;text-align:center;min-width:80px}.td-stat-val{font-size:1.4rem;font-weight:800;color:var(--primary);line-height:1}.td-stat-lbl{font-size:.72rem;color:var(--txt-low);margin-top:3px}.td-explain{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:18px 20px;margin:0 0 22px;color:var(--txt-mid);line-height:1.7;box-shadow:var(--sh-sm)}.td-explain h2{margin:0 0 8px;color:var(--txt);font-size:1.06rem;font-weight:800}.td-explain p{margin:0 0 10px;font-size:.9rem}.td-explain-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:12px}.td-explain-grid div{background:var(--surface2);border:1px solid var(--border);border-radius:12px;padding:12px}.td-explain-grid strong{display:block;color:var(--txt);font-size:.84rem;margin-bottom:4px}.td-explain-grid span{display:block;color:var(--txt-mid);font-size:.78rem;line-height:1.55}.td-controls{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.td-search-row{display:flex;align-items:center;gap:8px;flex-wrap:nowrap}.td-search-wrap{flex:1 1 0;min-width:0;max-width:380px;position:relative}.td-search{width:100%;padding:10px 16px;border:1.5px solid #334155;border-radius:12px;background:var(--surface2);color:var(--txt);font-size:.9rem;font-family:inherit;outline:none;transition:border-color .2s;box-sizing:border-box}.td-search:focus{border-color:var(--primary)}.td-filter-row{overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding-bottom:2px}.td-filter-row::-webkit-scrollbar{display:none}.td-filter-pills{display:flex;gap:6px;flex-wrap:nowrap;width:max-content}.td-pill{padding:6px 12px;border-radius:20px;border:1.5px solid var(--border);background:var(--surface2);color:var(--txt-mid);font-size:.82rem;font-weight:600;cursor:pointer;font-family:inherit;transition:all .2s;display:inline-flex;align-items:center;gap:5px}.td-pill:hover,.td-pill.active{background:#2c7be5;color:#fff !important;border-color:#2c7be5}.td-pill-count{font-size:.68rem;font-weight:700;opacity:.65;background:rgba(0,0,0,.10);border-radius:20px;padding:1px 6px;min-width:18px;text-align:center;line-height:1.5}.td-pill.active .td-pill-count{background:rgba(255,255,255,.22);opacity:1}.view-toggle{display:flex;gap:4px;background:var(--surface2);border:1.5px solid var(--border);border-radius:10px;padding:3px;flex-shrink:0;margin-left:auto}.view-btn{width:32px;height:32px;border-radius:7px;border:none;background:transparent;color:var(--txt);cursor:pointer;font-size:.9rem;display:flex;align-items:center;justify-content:center;transition:all .2s}#sortAZ{width:auto;padding:0 9px;font-size:.68rem;font-weight:700;letter-spacing:.3px}.view-btn.active{background:var(--surface,#fff);box-shadow:0 1px 4px rgba(0,0,0,.12);color:#2c7be5 !important}.td-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.td-grid.list-view{grid-template-columns:1fr}.td-card{background:var(--surface);border:1px solid var(--td-card-border);border-radius:16px;overflow:hidden;box-shadow:var(--sh-sm);cursor:pointer;transition:transform .22s,box-shadow .22s,border-color .22s;display:flex;flex-direction:column}.td-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:var(--primary)}.list-view .td-card{flex-direction:row;align-items:center}.td-thumb{width:100%;aspect-ratio:16/9;background:var(--surface2);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative;flex-shrink:0}.list-view .td-thumb{width:140px;aspect-ratio:auto;height:96px}.td-thumb img,.td-thumb video{width:100%;height:100%;object-fit:cover}.td-thumb-placeholder{font-size:2.8rem;opacity:.5}.td-thumb-badge{position:absolute;top:8px;right:8px;padding:3px 9px;border-radius:20px;font-size:.7rem;font-weight:700;color:#fff;backdrop-filter:blur(8px)}.td-type-badge{position:absolute;top:8px;left:8px;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;color:#fff;backdrop-filter:blur(8px);z-index:2}.td-type-badge.video{background:var(--td-red)}.td-type-badge.image{background:var(--td-green)}.td-play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.3);opacity:0;transition:opacity .2s}.td-card:hover .td-play-overlay{opacity:1}.td-play-icon{width:50px;height:50px;background:rgba(239,68,68,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem}.td-body{padding:16px;flex:1;display:flex;flex-direction:column;gap:8px}.td-card-title{font-size:.97rem;font-weight:700;color:var(--txt);line-height:1.3}.td-card-desc{font-size:.82rem;color:var(--txt-mid);line-height:1.5;flex:1}.td-card-meta{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:6px;margin-top:4px}.td-cat-pill{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-size:.75rem;font-weight:600;background:var(--primary-glow,rgba(44,123,229,.12));color:var(--primary)}.td-info-tag{font-size:.72rem;color:var(--txt-low);display:flex;align-items:center;gap:4px}.td-open-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;background:#2563eb;color:#fff !important;border:1.5px solid #2563eb;border-radius:8px;font-size:.8rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background .2s;margin-top:8px;align-self:flex-start;box-shadow:0 6px 16px rgba(37,99,235,.22)}.td-open-btn:hover{background:#1d4ed8;border-color:#1d4ed8;color:#fff !important}.td-open-btn.video{background:var(--td-red);border-color:var(--td-red)}.td-open-btn.video:hover{background:#dc2626;border-color:#dc2626}.td-empty{text-align:center;padding:60px 20px;color:var(--txt-low)}.td-empty i{font-size:3rem;margin-bottom:16px;display:block;opacity:.4}.td-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.9);z-index:9999;overflow-y:auto;-webkit-overflow-scrolling:touch}.td-overlay.open{display:block}.td-overlay-inner{display:table;width:100%;min-height:100%;padding:12px;box-sizing:border-box}.td-overlay-cell{display:table-cell;vertical-align:middle;text-align:center}.td-modal{display:inline-flex;flex-direction:column;text-align:left;background:#1e293b;border:1px solid rgba(255,255,255,.12);border-radius:20px;box-shadow:0 24px 64px rgba(0,0,0,.7);width:96%;max-width:1200px;max-height:95vh;overflow:hidden;animation:modalIn .22s ease;vertical-align:middle}@keyframes modalIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.td-modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.12);gap:12px;flex-shrink:0;background:#1e293b}.td-modal-title{font-size:1rem;font-weight:700;color:#f1f5f9}.td-modal-actions{display:flex;align-items:center;gap:6px}.td-act-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border-radius:8px;border:1.5px solid rgba(99,179,237,.5);background:rgba(99,179,237,.15);color:#90cdf4;font-size:.78rem;font-weight:600;cursor:pointer;font-family:inherit;transition:all .2s;text-decoration:none}.td-act-btn:hover{background:#2b6cb0;color:#fff;border-color:#2b6cb0}.td-close-btn{width:34px;height:34px;border-radius:9px;border:1.5px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:#cbd5e0;font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.td-close-btn:hover{background:rgba(239,68,68,.25);color:#fc8181;border-color:rgba(239,68,68,.5)}.td-modal-body{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px;background:#0f172a;min-height:0}.td-viewer{flex:1;min-height:400px;max-height:70vh;background:#0f172a;border:1px solid rgba(255,255,255,.08);border-radius:14px;overflow:hidden;position:relative;user-select:none}.td-image-viewer{position:absolute;inset:0;cursor:grab;display:none}.td-image-viewer.active{display:block}.td-image-viewer.grabbing{cursor:grabbing}#viewerCanvas{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;transform-origin:center center;will-change:transform}#viewerCanvas img{max-width:100%;max-height:100%;object-fit:contain;pointer-events:none;display:block}.td-video-viewer{position:absolute;inset:0;display:none;align-items:center;justify-content:center;background:#000}.td-video-viewer.active{display:flex}.td-video-viewer video{width:100%;height:100%;max-height:100%;object-fit:contain}.td-zoom-bar{position:absolute;bottom:12px;right:12px;display:flex;align-items:center;gap:4px;background:rgba(0,0,0,.45);backdrop-filter:blur(6px);border-radius:10px;padding:4px 6px;z-index:10}.td-zoom-btn{width:32px;height:32px;background:transparent;border:1px solid rgba(255,255,255,.2);border-radius:7px;color:#fff;font-size:.9rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s}.td-zoom-btn:hover{background:var(--primary);border-color:var(--primary)}.td-zoom-level{font-size:.72rem;color:rgba(255,255,255,.7);min-width:36px;text-align:center;font-family:monospace}.td-video-controls{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:8px;background:rgba(0,0,0,.7);backdrop-filter:blur(6px);border-radius:12px;padding:8px 16px;z-index:10}.td-vc-btn{width:36px;height:36px;background:transparent;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:#fff;font-size:.9rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}.td-vc-btn:hover{background:var(--td-red);border-color:var(--td-red)}.td-vc-time{font-size:.8rem;color:rgba(255,255,255,.8);font-family:monospace;min-width:90px;text-align:center}.td-vc-slider{width:150px;height:4px;-webkit-appearance:none;background:rgba(255,255,255,.2);border-radius:2px;outline:none}.td-vc-slider::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;background:var(--td-red);border-radius:50%;cursor:pointer}.td-vc-slider::-moz-range-thumb{width:12px;height:12px;background:var(--td-red);border-radius:50%;cursor:pointer;border:none}.td-spinner{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}.td-spinner::after{content:'';width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.td-modal-info{display:flex;gap:8px;flex-wrap:wrap}.td-modal-info-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:20px;font-size:.8rem;color:#cbd5e0}.td-modal-info-chip i{color:#63b3ed}.td-modal-info-chip.type-video{color:#fca5a5;border-color:rgba(239,68,68,.3)}.td-modal-info-chip.type-image{color:#6ee7b7;border-color:rgba(16,185,129,.3)}.td-no-img{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#94a3b8;font-size:.88rem}.td-no-img span{font-size:3rem;opacity:.4}@media(max-width:640px){.td-hero{flex-direction:column;align-items:flex-start}.td-stats{justify-content:center}.td-explain-grid{grid-template-columns:1fr}.td-search-wrap{flex:1 1 0;min-width:0}.td-modal-actions .td-act-btn span{display:none}.td-vc-slider{width:80px}.td-modal{max-height:98vh;border-radius:14px;width:100%}.td-viewer{min-height:250px;max-height:55vh}.td-overlay-inner{padding:6px}}.ws-tabs-wrap{position:relative;display:flex !important;align-items:center;gap:6px;width:100%;min-width:0}.ws-tabs-wrap .ws-tab-arrow{display:none;align-items:center;justify-content:center;width:28px;height:28px;min-width:28px;padding:0;border-radius:50%;border:1px solid rgba(0,0,0,0.12);background:#ffffff;color:#475569;box-shadow:0 2px 5px rgba(0,0,0,0.12);cursor:pointer;font-size:0.72rem;transition:all 0.2s ease;flex-shrink:0;z-index:5}.ws-tabs-wrap .ws-tab-arrow:hover{background:#2563eb;color:#ffffff;border-color:#2563eb;transform:scale(1.08)}[data-theme="dark"] .ws-tabs-wrap .ws-tab-arrow{background:#182844;border-color:rgba(255,255,255,0.15);color:#94a3b8;box-shadow:0 2px 6px rgba(0,0,0,0.4)}[data-theme="dark"] .ws-tabs-wrap .ws-tab-arrow:hover{background:#3b82f6;color:#ffffff;border-color:#3b82f6}.ws-tabs-wrap .ws-tabs,.ws-tabs-wrap #filterButtons,.ws-tabs-wrap #tdFilterPills{display:flex !important;gap:6px !important;flex-wrap:nowrap !important;overflow-x:auto !important;scrollbar-width:none !important;-ms-overflow-style:none !important;-webkit-overflow-scrolling:touch !important;cursor:grab;user-select:none;flex:1 !important;min-width:0 !important;padding:4px 0 !important}.ws-tabs-wrap .ws-tabs::-webkit-scrollbar,.ws-tabs-wrap #filterButtons::-webkit-scrollbar,.ws-tabs-wrap #tdFilterPills::-webkit-scrollbar{display:none !important}.ws-tabs-wrap .ws-tabs.is-dragging,.ws-tabs-wrap #filterButtons.is-dragging,.ws-tabs-wrap #tdFilterPills.is-dragging{cursor:grabbing !important;scroll-behavior:auto !important}