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.stat-pill:hover{transform:none;transition:none}.stats-band .stat-pill:hover .sp-n{animation:none}}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:16px}.feature-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}.feature-card .fc-icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.45rem;background:var(--accent-tint);margin-bottom:12px}.feature-card h3{font-size:1.1rem;margin:0 0 6px;color:var(--ink)}.feature-card p{font-size:.9rem;color:var(--ink-soft);margin:0;line-height:1.55}.cta-band{position:relative;text-align:center;padding:46px 30px;margin:40px 0 8px;border-radius:24px;background:linear-gradient(115deg,color-mix(in srgb,var(--accent) 10%,transparent),color-mix(in srgb,var(--accent2) 8%,transparent) 60%,color-mix(in srgb,var(--ochre) 8%,transparent)),var(--surface);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--line);box-shadow:var(--shadow)}.cta-band>*{position:relative}.cta-band h2{font-size:clamp(1.6rem,3.6vw,2.25rem);margin:0 0 10px}.cta-band p{color:var(--ink-soft);margin:0 auto 20px;max-width:46ch}@media (max-width: 900px){.lp-hero{grid-template-columns:1fr;gap:30px}.app-preview{transform:none;max-width:480px;margin:4px auto 0;animation:none}.stats-band{grid-template-columns:repeat(2,1fr);gap:20px;row-gap:22px}}.trust-row{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}.trust-badge{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;font-weight:600;color:var(--ink-soft);background:color-mix(in srgb,var(--surface) 80%,transparent);border:1px solid var(--line);border-radius:999px;padding:6px 12px}.trust-badge .ti{color:var(--accent-deep)}.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:.86rem;color:var(--muted);margin:2px 0 16px}.crumbs a{color:var(--ink-soft);text-decoration:none;font-weight:500}.crumbs a:hover{color:var(--accent-deep)}.crumbs .sep{opacity:.5}.crumbs .cur{color:var(--ink);font-weight:600}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}.tile{position:relative;display:flex;flex-direction:column;gap:6px;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--accent) 50%,var(--line))}.tile .tico{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;font-size:1.3rem;background:var(--accent-tint);color:var(--accent-deep);margin-bottom:6px}.tile.alt .tico{background:var(--accent2-tint);color:var(--accent2)}.tile .tname{font-weight:700;font-size:1.05rem;letter-spacing:-.01em}.tile .tmeta{font-size:.8rem;color:var(--muted)}.tile .tarrow{position:absolute;right:16px;top:16px;color:var(--muted);opacity:0;transform:translate(-4px);transition:opacity .18s,transform .18s}.tile:hover .tarrow{opacity:1;transform:none}.tile-num{font-family:var(--mono);font-size:.72rem;color:var(--muted)}.class-row{display:flex;flex-wrap:wrap;gap:12px}.class-chip{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;width:104px;min-height:96px;padding:12px 8px;box-sizing:border-box;border-radius:18px;text-decoration:none;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s,border-color .18s}.class-chip:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--accent)}.class-chip .cn{font-family:var(--sans);font-size:2rem;font-weight:800;letter-spacing:-.02em;color:var(--accent-deep);line-height:1}.class-chip .cl{font-size:.64rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-top:5px;line-height:1.25;overflow-wrap:anywhere}.board-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.board-card{text-decoration:none;color:var(--ink);position:relative;overflow:hidden}.board-card .bband{height:6px;border-radius:999px;background:var(--brand-grad);margin-bottom:14px}.board-card.hbse .bband{background:var(--warm-grad)}.reader{max-width:76ch;margin:0 auto}.reader h2{font-size:1.5rem;margin:30px 0 10px;color:var(--ink)}.reader h3{font-size:1.18rem;margin:22px 0 8px;color:var(--accent-deep);font-family:var(--sans);font-weight:700}.reader p{margin:0 0 14px;color:var(--ink-soft)}.reader ul,.reader ol{margin:0 0 14px;padding-left:24px;color:var(--ink-soft)}.reader li{margin:5px 0}.reader strong{color:var(--ink)}.reader code{font-family:var(--mono);font-size:.9em;background:var(--bg-tint);padding:1px 6px;border-radius:5px}.reader blockquote{margin:0 0 14px;padding:8px 16px;border-left:3px solid var(--accent);background:var(--accent-tint);border-radius:0 8px 8px 0;color:var(--ink)}.example{background:var(--surface-2);border:1px solid var(--line);border-left:4px solid var(--accent2);border-radius:10px;padding:14px 18px;margin:0 0 16px}.example .exlab{font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;font-weight:700;color:var(--accent2);display:block;margin-bottom:6px}.example .exq{font-weight:600;color:var(--ink);margin:0 0 8px}.keypoints{background:var(--accent-tint);border:1px solid var(--accent-soft);border-radius:12px;padding:16px 20px;margin:22px 0}.keypoints h4{margin:0 0 8px;font-size:.95rem;color:var(--accent-deep)}.keypoints ul{margin:0;padding-left:20px}.keypoints li{margin:4px 0;color:var(--ink)}.chapter-nav{display:flex;justify-content:space-between;gap:12px;margin-top:30px;padding-top:20px;border-top:1px solid var(--line)}.svg-figure{margin:6px 0 18px;padding:16px;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;text-align:center}.svg-figure-canvas{max-width:460px;margin:0 auto;color:var(--ink)}.svg-figure-canvas svg{width:100%;height:auto;max-height:360px;display:block}.svg-figure figcaption{margin-top:10px;font-size:.82rem;color:var(--muted);font-style:italic}.video-cta{display:inline-flex;align-items:center;gap:8px}.reader .refs{margin:24px 0 0;padding:14px 18px;background:var(--accent2-tint);border:1px solid var(--accent2-soft);border-radius:12px}.reader .refs h4{margin:0 0 8px;font-size:.95rem;color:var(--accent2)}.reader .refs a{display:inline-block;margin:2px 0}.md-table-wrap{overflow-x:auto;margin:0 0 16px;border:1px solid var(--line);border-radius:10px}.md-table{border-collapse:collapse;width:100%;font-size:.9rem}.md-table th,.md-table td{border-bottom:1px solid var(--line);border-right:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top;color:var(--ink-soft)}.md-table th{background:var(--accent-tint);color:var(--accent-deep);font-weight:700}.md-table tr:last-child td{border-bottom:none}.md-table th:last-child,.md-table td:last-child{border-right:none}.chapter-list{display:flex;flex-direction:column;gap:10px}.chapter-row{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s,border-color .15s}.chapter-row:hover{transform:translate(3px);box-shadow:var(--shadow-lg);border-color:var(--accent)}.chapter-row .cno{flex:0 0 auto;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-family:var(--sans);font-weight:800;background:var(--accent-tint);color:var(--accent-deep)}.chapter-row .ctitle{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;gap:2px;font-weight:600}.chapter-row .ct-meta{font-size:.74rem;font-weight:500;color:var(--muted)}.reader-meta{font-size:.85rem;color:var(--muted);font-weight:600;margin:0 0 16px}.bm-btn{display:inline-flex;align-items:center;gap:6px;font-family:var(--sans);font-weight:600;font-size:.88rem;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line-strong);border-radius:10px;padding:9px 15px;cursor:pointer;transition:background .15s,border-color .15s,color .15s}.bm-btn:hover{border-color:var(--accent);color:var(--accent-deep)}.bm-btn.on{color:var(--accent-deep);border-color:var(--accent);background:var(--accent-tint)}.bm-btn.sm{padding:6px 10px;font-size:1.05rem;line-height:1}.bm-btn:disabled{opacity:.6;cursor:default}.notes-panel{margin:26px 0 6px;padding:18px 20px;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius)}.np-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:10px;flex-wrap:wrap}.np-head h4{margin:0;font-size:1rem;color:var(--ink)}.np-private{font-size:.74rem;color:var(--muted)}.np-text{width:100%;font-family:var(--sans);font-size:.95rem;line-height:1.6;color:var(--ink);background:var(--field);border:1px solid var(--line-strong);border-radius:10px;padding:12px 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auto}.saved-text{display:flex;flex-direction:column;gap:2px;min-width:0}.saved-title{font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.saved-meta{font-size:.78rem;color:var(--muted)}.saved-note-snip{font-size:.84rem;color:var(--ink-soft);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.complete-btn{display:inline-flex;align-items:center;gap:6px;font-family:var(--sans);font-weight:600;font-size:.88rem;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line-strong);border-radius:10px;padding:9px 15px;cursor:pointer;transition:background .15s,border-color .15s,color .15s}.complete-btn:hover{border-color:var(--good);color:var(--good)}.complete-btn.on{color:#fff;background:var(--good);border-color:var(--good)}.complete-btn:disabled{opacity:.6;cursor:default}.push-toast{position:fixed;top:12px;left:50%;transform:translate(-50%);z-index:100;display:flex;gap:10px;align-items:center;max-width:min(440px,92vw);text-decoration:none;background:var(--panel);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid color-mix(in srgb,var(--accent) 45%,var(--line));border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-lg);animation:pt-in .25s ease}.push-toast .pt-ic{font-size:1.3rem}.push-toast .pt-body{display:flex;flex-direction:column;gap:1px;min-width:0}.push-toast .pt-body strong{color:var(--ink);font-size:.92rem}.push-toast .pt-body span{color:var(--ink-soft);font-size:.82rem;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}@keyframes pt-in{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}.drill-row{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 22px}.drill-chip{display:inline-flex;flex-direction:column;gap:1px;text-decoration:none;background:var(--rose-soft);border:1px solid color-mix(in srgb,var(--rose) 35%,var(--line));border-radius:10px;padding:9px 14px;transition:transform .15s,box-shadow .15s}.drill-chip:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.drill-t{font-weight:700;color:var(--ink);font-size:.92rem}.drill-pct{font-size:.76rem;font-weight:600;color:var(--rose)}.danger-zone{border:1px solid color-mix(in srgb,var(--rose) 40%,var(--line));border-radius:var(--radius);background:color-mix(in srgb,var(--rose) 5%,var(--surface));padding:4px 0 0;margin-top:8px;overflow:hidden}.dz-head{font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;font-weight:700;color:var(--rose);padding:12px 18px 6px}.dz-row{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:4px 18px 16px}.dz-btn{border-color:var(--rose);color:var(--rose);flex:0 0 auto}.dz-btn:hover{background:var(--rose-soft);border-color:var(--rose);color:var(--rose)}.dz-btn.danger-solid{background:var(--rose);border-color:var(--rose);color:#fff}.dz-btn.danger-solid:hover:not(:disabled){background:color-mix(in srgb,var(--rose) 85%,#000);color:#fff}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:color-mix(in srgb,#000 55%,transparent);display:flex;align-items:center;justify-content:center;padding:20px;animation:reveal .16s ease both}.modal-card{width:100%;max-width:440px;background:var(--panel);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);padding:22px 22px 18px;max-height:90vh;overflow-y:auto}.dz-list{margin:0 0 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strong{font-weight:800}.share-card{display:flex;gap:18px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;margin:0 0 18px;flex-wrap:wrap}.share-preview{flex:0 0 148px;width:148px;height:148px;border-radius:14px;overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--shadow);background:#0b1430}.share-preview .share-canvas{display:block;width:100%;height:100%;object-fit:cover}.share-body{flex:1;min-width:220px}@media (max-width: 480px){.share-card{flex-direction:column;align-items:stretch}.share-preview{width:100%;height:auto;aspect-ratio:1;flex-basis:auto;max-width:320px;margin:0 auto}}.sk{position:relative;overflow:hidden;background:color-mix(in srgb,var(--ink) 8%,var(--surface));border-radius:10px}.sk:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(100deg,transparent 30%,color-mix(in srgb,var(--ink) 7%,transparent) 50%,transparent 70%);background-size:200% 100%;animation:sk-sweep 1.3s linear infinite}@keyframes sk-sweep{0%{background-position:200% 0}to{background-position:-200% 0}}.sk-line{height:14px;margin:8px 0}.sk-line.lg{height:26px}.sk-line.w40{width:40%}.sk-line.w60{width:60%}.sk-line.w80{width:80%}.sk-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);padding:16px 18px}.sk-row{display:flex;gap:10px;flex-wrap:wrap}.sk-pill{height:86px;flex:1 1 132px;border-radius:16px}.sk-block{height:120px;margin:10px 0}@media (prefers-reduced-motion: reduce){.sk:after{animation:none}}.ob-card{max-width:480px}.ob-title{font-size:1.35rem;margin:4px 0 6px}.ob-sub{margin:0 0 14px;font-size:.92rem}.ob-choices{display:grid;gap:10px}.ob-choice{display:grid;gap:2px;text-align:left;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;font-family:var(--sans);transition:border-color .15s,transform .15s,box-shadow .15s}.ob-choice:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow)}.ob-ic{font-size:1.5rem}.ob-ct{font-weight:800;font-size:1.02rem;color:var(--ink)}.ob-cd{font-size:.82rem;color:var(--muted)}.ob-exams{display:grid;gap:8px;margin:12px 0 4px;max-height:46vh;overflow-y:auto}.ob-exam{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);cursor:pointer;font-family:var(--sans);transition:border-color .15s,background .15s}.ob-exam:hover{border-color:var(--accent);background:var(--accent-tint)}.ob-et{font-weight:700;font-size:.93rem;color:var(--ink);text-align:left}.ob-em{font-size:.75rem;color:var(--muted);white-space:nowrap}.ob-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:14px}.ob-foot .linkish:only-child{margin-left:auto}.lang-toggle{flex:0 0 auto}.lang-toggle button{min-width:74px}.sel-tr-btn{font-family:var(--sans);font-size:.8rem;font-weight:600;color:var(--on-accent);background:var(--accent);border:0;border-radius:999px;padding:7px 14px;cursor:pointer;box-shadow:var(--shadow-lg)}.sel-tr-btn:hover{background:var(--accent-deep)}.sel-tr-pop{display:block;max-width:min(340px,86vw);font-size:.9rem;line-height:1.5;color:var(--ink);background:var(--surface);border:1px solid color-mix(in srgb,var(--accent) 40%,var(--line));border-radius:10px;padding:10px 14px;box-shadow:var(--shadow-lg)}.sel-tr-src{display:block;font-size:.72rem;color:var(--muted);font-weight:600;margin-bottom:4px}.qlang{font-family:var(--sans);font-size:.72rem;font-weight:600;color:var(--accent-deep);background:var(--accent-tint);border:1px solid color-mix(in srgb,var(--accent) 35%,var(--line));border-radius:999px;padding:2px 10px;cursor:pointer;transition:background .15s,border-color .15s}.qlang:hover{background:var(--accent-soft);border-color:var(--accent)}.complete-gate{display:inline-flex;flex-direction:column;gap:4px;align-items:flex-start}.gate-hint{font-size:.72rem;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums}.subj-progress{margin:0 0 22px}.sp-bar{height:8px;border-radius:999px;background:var(--bg-tint);overflow:hidden}.sp-bar>span{display:block;height:100%;background:var(--brand-grad);border-radius:999px;transition:width .4s ease}.sp-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:8px}.sp-text{font-size:.85rem;color:var(--ink-soft);font-weight:600}.chapter-row .cno.done{background:var(--good);color:#fff}.cert-actions{display:flex;gap:10px;justify-content:flex-end;margin:0 0 18px}.certificate{max-width:820px;margin:0 auto;background:var(--surface);border-radius:14px;padding:14px;box-shadow:var(--shadow-lg)}.cert-inner{position:relative;border:2px solid var(--accent);border-radius:10px;padding:48px 40px 36px;text-align:center;background:radial-gradient(circle at 50% -10%,color-mix(in srgb,var(--accent) 12%,transparent),transparent 60%)}.cert-inner:before{content:"";position:absolute;top:8px;right:8px;bottom:8px;left:8px;border:1px solid color-mix(in srgb,var(--accent) 40%,var(--line));border-radius:6px;pointer-events:none}.cert-badge{font-size:2.6rem}.cert-brand{font-weight:800;letter-spacing:-.02em;font-size:1.1rem;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-top:2px}.cert-kicker{text-transform:uppercase;letter-spacing:.28em;font-size:.82rem;font-weight:700;color:var(--accent-deep);margin:18px 0 20px}.cert-pre,.cert-body{color:var(--ink-soft);font-size:.95rem;margin:6px 0}.cert-name{font-size:clamp(1.8rem,5vw,2.8rem);font-weight:800;letter-spacing:-.02em;margin:6px 0 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