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h1{font-size:2.5rem;font-weight:800;color:var(--text-primary);margin-bottom:var(--spacing-sm);line-height:1.2}.demo-page .subtitle{font-size:1.1rem;color:var(--text-secondary);margin-bottom:var(--spacing-lg);line-height:1.6}.demo-page h2{font-size:1.8rem;font-weight:700;color:var(--text-primary);margin-top:var(--spacing-xl);margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--border-color)}.demo-page h3{font-size:1.3rem;font-weight:600;color:var(--text-primary);margin-top:var(--spacing-lg);margin-bottom:var(--spacing-sm)}.key-points{margin:var(--spacing-lg) 0}.key-points ul{list-style:none;padding:0}.key-points li{padding:var(--spacing-sm) var(--spacing-md);margin-bottom:var(--spacing-sm);background:var(--bg-secondary);border-left:4px solid var(--primary);border-radius:var(--radius-sm);color:var(--text-primary);line-height:1.6}.key-points 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