feat(content): implement consultant review recommendations (executive summary, dynamic cta, homelab cleanup)

src/styles/global.css

@@ -234,6 +234,58 @@ article img {
   height: auto;
 }
 
+/* ---------- Technical Deep Dive Accordion (details/summary) ---------- */
+article details.tech-deep-dive {
+  margin: 1.75rem 0;
+  padding: 1rem 1.25rem;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  transition: all 0.2s ease;
+}
+
+article details.tech-deep-dive[open] {
+  padding-bottom: 1.25rem;
+}
+
+article details.tech-deep-dive > summary {
+  cursor: pointer;
+  font-weight: 600;
+  font-size: 0.95rem;
+  color: var(--brand);
+  user-select: none;
+  outline: none;
+  list-style: none;
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+article details.tech-deep-dive > summary::-webkit-details-marker {
+  display: none;
+}
+
+article details.tech-deep-dive > summary::before {
+  content: '▶';
+  font-size: 0.75rem;
+  transition: transform 0.2s ease;
+  color: var(--brand-soft);
+}
+
+article details.tech-deep-dive[open] > summary::before {
+  transform: rotate(90deg);
+}
+
+article details.tech-deep-dive > summary:hover {
+  color: var(--brand-soft);
+}
+
+article details.tech-deep-dive[open] > summary {
+  margin-bottom: 1rem;
+  border-bottom: 1px dashed var(--border);
+  padding-bottom: 0.65rem;
+}
+
 time { color: var(--faint); font-size: 0.88rem; }
 
 /* Light theme: the v2 artwork is a near-black viewport, so on a white page it reads as