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b{color:var(--text-light-primary);font-weight:600}.ai-tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}.ai-tier{display:flex;flex-direction:column;background:var(--bg-light-card);border:1px solid var(--border-light);border-radius:var(--radius);padding:1.8rem}.ai-tier.featured{border-color:var(--accent);box-shadow:0 18px 40px -22px #7c3aed80}.ai-tier .tier-tag{font-size:.78rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--accent-2);margin-bottom:.6rem}.ai-tier .tier-name{font-size:1.25rem;font-weight:600;color:var(--text-light-primary);letter-spacing:-.02em;line-height:1.25}.ai-tier .tier-name small{display:block;font-size:.82rem;font-weight:400;color:var(--text-light-muted);margin-top:.3rem;letter-spacing:0;line-height:1.45}.ai-tier ul{list-style:none;margin:1.1rem 0 0;padding:0;display:flex;flex-direction:column;gap:.6rem}.ai-tier 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h3{font-size:1.1rem;font-weight:600;color:var(--text-light-primary);margin-bottom:.5rem;letter-spacing:-.01em}.ai-note-band p{color:var(--text-light-muted);font-size:.98rem;line-height:1.6}.light.ai-light-next{padding-top:0}.ai-brief-head{background:var(--bg-light);color:var(--text-light-primary);padding:4.5rem 0 0}.ai-brief-head h2{font-size:clamp(1.8rem,3vw,2.55rem);font-weight:650;letter-spacing:-.025em;line-height:1.14;color:var(--text-light-primary);margin-bottom:.7rem}.ai-brief-head .lead{color:var(--text-light-muted);font-size:1.05rem}.ai-brief-head .sec-head{margin-bottom:0}@media(max-width:1000px){.ai-prob-grid,.ai-comp-grid,.ai-tiers,.ai-steps{grid-template-columns:repeat(2,1fr)}}@media(max-width:880px){.ai-hero-grid{grid-template-columns:1fr;gap:2.2rem}.ai-mock{margin-left:0}.ai-prob-grid,.ai-comp-grid,.ai-tiers,.ai-steps{grid-template-columns:1fr}.ai-sc-row{grid-template-columns:90px 1fr;gap:.8rem}}