.deck-root{position:fixed;inset:0;background:#ffffff;overflow:hidden;color:var(--body);--deck-brand:#4f46e5;--deck-ink:#1e1b33;--deck-topbar-h:52px}.deck-blob{position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none;z-index:0}.deck-blob-1{width:46vmax;height:46vmax;background:#eef0ff;top:-18vmax;right:-12vmax;opacity:.8;animation:deckFloat1 16s ease-in-out infinite}.deck-blob-2{width:42vmax;height:42vmax;background:#e7fbf7;bottom:-16vmax;left:-10vmax;opacity:.8;animation:deckFloat2 20s ease-in-out infinite}@keyframes deckFloat1{0%,to{transform:translate(0) scale(1)}50%{transform:translate(-3vmax,2.4vmax) scale(1.06)}}@keyframes deckFloat2{0%,to{transform:translate(0) scale(1)}50%{transform:translate(2.4vmax,-2vmax) scale(1.08)}}@media (prefers-reduced-motion:reduce){.deck-blob-1,.deck-blob-2{animation:none}}.deck-stage{position:absolute;top:var(--deck-topbar-h);left:0;right:0;bottom:0;z-index:1;display:flex;align-items:stretch;justify-content:center;padding:clamp(44px,6vh,64px) clamp(24px,6vw,120px)}.deck-slide{position:relative;width:100%;height:100%;overflow:hidden}.deck-anim{width:100%;height:100%;display:flex;align-items:center;justify-content:center}.deck-fit{width:100%;max-width:1200px;transform-origin:center center;font-size:clamp(16px,min(2.3vw,4vh),42px)}.deck-fit .prose{font-size:1em;line-height:1.5;color:var(--deck-ink);width:100%}.deck-fit .prose>*+*{margin-top:.9em}.deck-fit .prose h1{font-size:2.5em}.deck-fit .prose h2{font-size:1.9em}.deck-fit .prose h3{font-size:1.4em}.deck-fit .prose pre{font-size:.68em}.deck-fit .prose>:first-child{margin-top:0}.deck-fit .prose img{width:auto}.deck-fit.is-title,.deck-fit.is-title .prose{text-align:center}.deck-topbar{position:absolute;top:0;left:0;right:0;height:var(--deck-topbar-h);z-index:22;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 clamp(14px,3vw,36px);background:rgba(255,255,255,.82);backdrop-filter:saturate(140%) blur(12px);-webkit-backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line)}.deck-topbar .dt-left{display:flex;align-items:center;gap:10px;min-width:0}.deck-topbar .dt-logo{width:26px;height:26px;object-fit:contain;flex-shrink:0}.deck-topbar .dt-title{font-family:var(--font-display);font-weight:600;color:var(--deck-ink);font-size:.98rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.deck-topbar .dt-course{color:var(--muted);font-weight:500;margin-right:8px;font-family:var(--font-mono);font-size:.82rem}.deck-topbar .dt-right{display:flex;align-items:center;gap:14px;flex-shrink:0}.deck-topbar .dt-count{font-family:var(--font-mono);font-size:.85rem;color:var(--muted)}.deck-topbar .dt-count b{color:var(--deck-brand);font-weight:700}.deck-progress{position:absolute;top:var(--deck-topbar-h);left:0;height:3px;background:var(--grad-brand);z-index:23;transition:width .4s ease}.deck-arrows{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);z-index:20;display:flex;gap:8px}.deck-arrow{width:42px;height:42px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.85);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:var(--deck-ink);display:grid;place-items:center;cursor:pointer;transition:all .15s ease}.deck-arrow:hover:not(:disabled){background:var(--deck-brand);color:#fff;border-color:var(--deck-brand)}.deck-arrow:disabled{opacity:.35;cursor:default}.deck-jump{position:absolute;top:64px;right:24px;z-index:60;background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:2px solid var(--deck-brand);border-radius:16px;padding:12px 26px;display:flex;flex-direction:column;align-items:center;gap:2px;box-shadow:var(--shadow-lg)}.deck-jump small{font-size:.7rem;color:var(--muted);font-weight:600;letter-spacing:.04em}.deck-jump strong{font-size:2rem;font-weight:800;color:var(--deck-brand);line-height:1;font-family:var(--font-mono)}.deck-overview{position:absolute;inset:0;z-index:70;background:linear-gradient(180deg,rgba(255,255,255,.97),rgba(247,247,252,.97));-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);overflow-y:auto;padding:48px 6vw 64px}.deck-overview-head{text-align:center;margin-bottom:34px}.deck-overview-head h3{font-size:1.7rem}.deck-overview-head p{color:var(--muted);margin-top:6px;font-size:.9rem}.overview-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:18px;gap:18px;max-width:1180px;margin:0 auto}.overview-thumb{aspect-ratio:16/10;border-radius:16px;border:1px solid var(--border);background:#fff;padding:18px;cursor:pointer;overflow:hidden;position:relative;display:flex;flex-direction:column;justify-content:flex-end;text-align:left;transition:box-shadow .18s ease,border-color .18s ease;box-shadow:var(--shadow-sm)}.overview-thumb:hover{box-shadow:var(--shadow-lg);border-color:var(--brand-light)}.overview-thumb.active{border-color:var(--deck-brand);box-shadow:0 0 0 3px var(--brand-bg),var(--shadow-md)}.overview-thumb .ov-watermark{position:absolute;top:-.15em;right:.1em;font-family:var(--font-display);font-weight:600;font-size:5.5em;line-height:1;color:var(--brand-bg);pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.overview-thumb .ov-index{position:relative;font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.04em;color:var(--deck-brand);margin-bottom:6px}.overview-thumb .ov-title{position:relative;font-family:var(--font-display);font-weight:600;color:var(--deck-ink);font-size:1rem;line-height:1.2}.overview-thumb .ov-current{position:absolute;top:12px;left:12px;font-size:.62rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#fff;background:var(--grad-brand);padding:3px 8px;border-radius:999px}.deck-drawer-backdrop{position:absolute;inset:0;z-index:80;background:rgba(30,27,51,.15);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.deck-drawer{position:absolute;top:0;left:0;bottom:0;z-index:85;width:320px;background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);border-right:1px solid var(--border);box-shadow:4px 0 30px rgba(79,70,229,.1);display:flex;flex-direction:column}.deck-drawer-head{padding:20px 22px 14px;border-bottom:1px solid var(--line)}.deck-drawer-head strong{font-family:var(--font-display);color:var(--deck-ink);font-size:1.05rem}.deck-drawer-head p{font-size:.78rem;color:var(--muted);margin-top:2px}.deck-drawer-list{flex:1 1;overflow-y:auto;padding:10px}.drawer-item{width:100%;text-align:left;display:flex;align-items:center;gap:12px;padding:9px 12px;margin-bottom:3px;border-radius:10px;border:none;background:none;cursor:pointer;transition:background .12s ease}.drawer-item:hover{background:var(--bg-2)}.drawer-item.active{background:var(--brand-bg)}.drawer-item .di-num{flex-shrink:0;width:24px;height:24px;border-radius:7px;font-family:var(--font-mono);font-size:.68rem;font-weight:700;display:grid;place-items:center;background:var(--bg-2);color:var(--muted)}.drawer-item.active .di-num{background:var(--deck-brand);color:#fff}.drawer-item .di-title{font-size:.85rem;color:var(--body);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.drawer-item.active .di-title{color:var(--brand-strong);font-weight:600}.deck-drawer-foot{padding:12px;border-top:1px solid var(--line);text-align:center;font-size:.72rem;color:var(--muted)}.deck-help{position:absolute;inset:0;z-index:90;background:rgba(30,27,51,.4);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:grid;place-items:center;padding:24px}.deck-help-card{background:#fff;border-radius:20px;padding:32px 36px;max-width:520px;width:100%;box-shadow:var(--shadow-lg)}.deck-help-card h3{font-size:1.4rem;margin-bottom:20px;text-align:center}.help-row{display:flex;align-items:center;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--line)}.help-row:last-child{border-bottom:none}.help-row .help-label{color:var(--body);font-size:.92rem}.kbd{font-family:var(--font-mono);font-size:.78rem;background:var(--bg-2);border:solid var(--border);border-width:1px 1px 2px;border-radius:7px;padding:3px 9px;color:var(--deck-ink);font-weight:600}.kbd+.kbd{margin-left:6px}.deck-notes{position:absolute;left:0;right:0;bottom:0;z-index:55;background:var(--deck-ink);color:#e8e7f5;padding:18px 24px 22px;max-height:38vh;overflow-y:auto;box-shadow:0 -10px 40px rgba(0,0,0,.25)}.deck-notes .notes-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:#a5a1d6;font-weight:700;margin-bottom:8px}.deck-notes .prose{color:#e8e7f5;font-size:.95rem}.deck-notes .prose strong{color:#fff}@media print{.deck-root{display:none}}