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0}.section.alt{background:var(--soft)}.intro{max-width:76ch;color:var(--muted);font-size:1.06rem}.grid2,.grid3{display:grid;gap:1rem;margin-top:1.4rem}.grid2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid3{grid-template-columns:repeat(3,minmax(0,1fr))}.steps{counter-reset:step;display:grid;gap:1rem;padding:0}.steps li{counter-increment:step;list-style:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem 1rem 1rem 3.5rem;position:relative}.steps li::before{content:counter(step);position:absolute;left:1rem;top:1rem;width:1.8rem;height:1.8rem;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;font-weight:800}.note{background:#edf7f5;border-left:4px solid var(--accent);padding:1rem;border-radius:0 12px 12px 0}.warning{background:var(--warn);border-left:4px solid var(--warn-line);padding:1rem;border-radius:0 12px 12px 0}.map-scroll,.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff}.map{min-width:820px;padding:1.2rem}.mind-layout{display:grid;grid-template-columns:1fr 210px 1fr;gap:1rem;align-items:center}.center-node,.node{border:2px solid #a99cf4;border-radius:14px;padding:.75rem;text-align:center;background:#f3f0ff}.center-node{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:850}.branch{display:grid;gap:.7rem}.concept-layout{display:grid;grid-template-columns:repeat(3,minmax(180px,1fr));gap:2.3rem 1rem;align-items:center}.concept{border:2px solid #86b8b1;background:#edfaf8;border-radius:999px;padding:.7rem;text-align:center;font-weight:800}.relation{text-align:center;color:#3b625e;font-size:.88rem;font-weight:750}.compare{width:100%;min-width:720px;border-collapse:collapse}.compare th,.compare td{padding:.85rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}.compare 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