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/hero.el

@@ -10,16 +10,15 @@ fn hero() -> String {
   <div class=\"glow-tl\" aria-hidden=\"true\"></div>
   <div class=\"glow-br\" aria-hidden=\"true\"></div>
 
-  <p class=\"label hero-label animate-up-1\">One builder. Six patents. No permission.</p>
+  <p class=\"label hero-label animate-up-1\">One builder. Patented. No permission.</p>
 
   <h1 class=\"display-xl hero-headline animate-up-2\">
     Every AI resets when you close the tab.
-    <em class=\"gold\" style=\"font-style:normal\">I built the one that doesn&#39;t - and priced it below the ones that do.</em>
+    <em class=\"gold\" style=\"font-style:normal\">I built the one that doesn&#39;t.</em>
   </h1>
 
   <p class=\"hero-sub animate-up-3\">
-    Runs on your machine. Remembers everything. Cheaper than ChatGPT on day one.
-    No cloud required - and when you want inference, mine costs less than theirs.
+    Runs on your machine. Remembers everything. Priced below ChatGPT on day one.
   </p>
 
   <div class=\"hero-ctas animate-up-5\">