Polish: nav hamburger, pillar alignment, wordmark, hero tightening

- Nav: responsive hamburger at ≤1060px, full mobile menu with close behaviors
- Nav: all section anchors are absolute (/#...) for correct cross-page routing
- Pillars: flex column cards with margin-top:auto on taglines — all three align
- About footer: image wordmark matches main page (was plain text "Neuron")
- Hero: "Six patents" → "Patented"; sub-copy trimmed to one clean sentence
- Environmental/efficiency/inference: remove all "memory graph" mentions, cite 40% token reduction
- Environmental: savings calculator (slider, live annual savings calculation)

src/inference.el

@@ -43,7 +43,7 @@ fn inference() -> String {
             <span class=\"stat-num\">Neuron</span>
             <span class=\"stat-label\">The model - live on day one</span>
           </div>
-          <p class=\"stat-body\">Built on Qwen3 - open weights, Sonnet-equivalent capability. Neuron wraps it with your full context, your memory graph, and years of accumulated intelligence. The model is the floor. Neuron is the ceiling.</p>
+          <p class=\"stat-body\">Built on Qwen3 - open weights, Sonnet-equivalent capability. Neuron wraps it with your full context, years of accumulated intelligence. The model is the floor. Neuron is the ceiling.</p>
         </div>
         <div class=\"stat-row reveal\" style=\"transition-delay:240ms\">
           <div class=\"stat-row-head\">