feat: single-page redesign with text-only hero, team section, services grid, mobile nav

- Replace component-based index with unified inline page
- Add text-only hero with warm editorial typography
- Add team section with avatars and bios
- Convert services to responsive grid layout
- Add contact labels and editorial images
- Implement mobile hamburger navigation with slide-in panel
- Polish typography, spacing, and accessibility
- Remove design variant pages (1-6)

src/components/sections/Services.astro

@@ -0,0 +1,23 @@
+---
+import { siteContent } from "@/content/site-content"
+---
+
+<section id="leistungen" class="section-shell services-section" aria-labelledby="services-title">
+  <div class="section-heading">
+    <p class="eyebrow">Leistungen</p>
+    <h2 id="services-title">Alles, was ein guter Salonbesuch braucht.</h2>
+    <p>Die Auswahl bleibt bewusst klar. Details, Wünsche und Termine werden am besten direkt telefonisch besprochen.</p>
+  </div>
+
+  <div class="service-list">
+    {
+      siteContent.services.map((service, index) => (
+        <article class="service-row">
+          <span class="service-index">{String(index + 1).padStart(2, "0")}</span>
+          <h3>{service.title}</h3>
+          <p>{service.text}</p>
+        </article>
+      ))
+    }
+  </div>
+</section>