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var(--accent-soft);border-radius:50%;position:absolute;top:4px;left:0}.phase h3{font-size:1.05rem;font-family:var(--font-mono);color:var(--accent-ink);letter-spacing:0;margin:0 0 14px}.nodes{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:12px;display:grid}.node{background:var(--bg-elev);border:1px solid var(--border);color:var(--text);border-radius:14px;align-items:center;gap:14px;padding:14px 16px;transition:border-color .15s,transform .15s;display:flex}.node:hover{border-color:var(--accent-ink);text-decoration:none;transform:translateY(-2px)}.node .ring{--p:0;width:46px;height:46px;font-size:.75rem;font-weight:800;font-family:var(--font-mono);background:radial-gradient(closest-side, var(--bg-elev) 76%, transparent 78% 100%), conic-gradient(var(--accent) calc(var(--p) * 1%), var(--bg-sunk) 0);border-radius:50%;flex-shrink:0;place-items:center;display:grid}.node .ring.empty{color:var(--text-muted)}.node strong{font-size:.97rem;line-height:1.3;display:block}.node 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var(--border);max-width:640px;color:var(--text-muted);border-radius:14px;justify-content:center;align-items:center;gap:14px;margin:28px auto 0;padding:16px 20px;font-size:.95rem;display:flex}.guarantee strong{color:var(--text)}details.faq{border-bottom:1px solid var(--border);padding:18px 0}details.faq summary{cursor:pointer;justify-content:space-between;gap:12px;font-size:1.05rem;font-weight:700;list-style:none;display:flex}details.faq summary:after{content:"+";color:var(--accent-ink);font-weight:800}details.faq[open] summary:after{content:"−"}details.faq p{color:var(--text-muted);margin:12px 0 0}.cta-banner{text-align:center;border:1px solid var(--border);background:radial-gradient(500px 220px at 50% 0%, #a6ff4d29, transparent 70%), var(--bg-elev);border-radius:24px;padding:56px 24px}.lesson-list{margin:0;padding:0;list-style:none}.lesson-list li a,.lesson-list li>div{color:var(--text);border-radius:10px;align-items:center;gap:12px;padding:12px 14px;display:flex}.lesson-list li 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(max-width:960px){.lesson-layout{grid-template-columns:1fr;padding-top:16px}.lesson-side{display:none}body:has(.chapter-bar){padding-bottom:calc(72px + env(safe-area-inset-bottom))}.chapter-bar{z-index:40;padding:10px 14px calc(12px + env(safe-area-inset-bottom));background:var(--bg-elev);border-top:2px dashed var(--border);grid-template-columns:auto 1fr auto;align-items:center;gap:10px;transition:transform .25s;display:grid;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -8px 24px #0000000f}.chapter-bar.is-hidden{transform:translateY(115%)}.chapter-btn.btn{min-height:44px;padding:9px 16px}.chapter-btn[aria-disabled=true]{opacity:.4;pointer-events:none}.chapter-mid{min-width:0;font:inherit;color:var(--blue);cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:0;flex-direction:column;align-items:center;gap:4px;padding:4px 0;display:flex}.chapter-label{white-space:nowrap;align-items:center;gap:6px;font-size:1.35rem;font-weight:700;line-height:1;display:inline-flex}.chapter-caret{border-top:2.5px solid;border-left:2.5px solid;width:8px;height:8px;margin-left:3px;transform:translateY(3px)rotate(45deg)}.chapter-track{background:var(--bg-sunk);border-radius:99px;width:min(100%,120px);height:5px;overflow:hidden}.chapter-track>span{background:var(--accent);border-radius:99px;height:100%;display:block}.chapter-sheet-wrap{z-index:50;pointer-events:none;display:block;position:fixed;inset:0}.chapter-sheet-wrap.is-open{pointer-events:auto}.chapter-backdrop{opacity:0;background:#0006;transition:opacity .2s;position:absolute;inset:0}.is-open .chapter-backdrop{opacity:1}.chapter-sheet{background:var(--bg-elev);border:2px solid var(--border);max-height:75vh;padding-bottom:env(safe-area-inset-bottom);border-bottom:0;border-radius:22px 22px 0 0;flex-direction:column;transition:transform 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