r">
            <div class="section-header">
                <h2>System Architecture</h2>
                <p>Detailed breakdown of the PAM4 receiver architecture and signal processing flow</p>
            </div>
            
            <div class="architecture-details">
                <div class="arch-overview">
                    <h3>Signal Processing Chain</h3>
                    <div class="signal-flow">
                        <div class="flow-stage">
                            <div class="stage-ic