Update landing page: focus on custom subdomain portals, fix anchor navigation and smooth scroll

css/style.css

@@ -14,6 +14,10 @@
   --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
 }
 
+html {
+  scroll-behavior: smooth;
+}
+
 * {
   margin: 0;
   padding: 0;
@@ -125,15 +129,14 @@ nav.main-nav a.active {
 
 /* Hero Section */
 .hero {
-  padding: 90px 0 60px;
+  padding: 80px 0 50px;
   text-align: center;
   position: relative;
-  overflow: hidden;
 }
 
 .hero-badge {
   display: inline-block;
-  padding: 6px 14px;
+  padding: 6px 16px;
   background: rgba(56, 189, 248, 0.1);
   border: 1px solid rgba(56, 189, 248, 0.25);
   border-radius: 9999px;
@@ -160,10 +163,18 @@ nav.main-nav a.active {
 .hero p {
   font-size: 1.15rem;
   color: var(--text-muted);
-  max-width: 650px;
+  max-width: 700px;
   margin: 0 auto 36px;
 }
 
+.hero code {
+  background: rgba(56, 189, 248, 0.15);
+  color: var(--accent);
+  padding: 2px 8px;
+  border-radius: 4px;
+  font-size: 0.95em;
+}
+
 .hero-actions {
   display: flex;
   gap: 16px;
@@ -172,6 +183,10 @@ nav.main-nav a.active {
 }
 
 /* Features Grid */
+section.features, section.steps, section.contact {
+  scroll-margin-top: 85px;
+}
+
 .features {
   padding: 60px 0 80px;
 }
@@ -193,7 +208,7 @@ nav.main-nav a.active {
 
 .grid-3 {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
+  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
   gap: 24px;
 }
 
@@ -227,6 +242,54 @@ nav.main-nav a.active {
   font-size: 0.95rem;
 }
 
+/* Steps Section */
+.steps {
+  padding: 60px 0 80px;
+  background: rgba(19, 27, 46, 0.5);
+  border-top: 1px solid var(--border-color);
+  border-bottom: 1px solid var(--border-color);
+}
+
+.step-number {
+  width: 44px;
+  height: 44px;
+  background: var(--accent);
+  color: #0b0f19;
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-weight: 800;
+  font-size: 1.2rem;
+  margin-bottom: 18px;
+}
+
+/* Contact CTA */
+.contact-cta {
+  padding: 80px 0;
+  text-align: center;
+}
+
+.cta-box {
+  background: linear-gradient(135deg, rgba(26, 38, 64, 0.9) 0%, rgba(19, 27, 46, 0.9) 100%);
+  border: 1px solid rgba(56, 189, 248, 0.2);
+  border-radius: var(--radius-lg);
+  padding: 48px 32px;
+  max-width: 800px;
+  margin: 0 auto;
+}
+
+.cta-box h2 {
+  font-size: 2rem;
+  margin-bottom: 16px;
+}
+
+.cta-box p {
+  color: var(--text-muted);
+  font-size: 1.1rem;
+  margin-bottom: 28px;
+}
+
 /* Content Page (Impressum, Datenschutz) */
 .content-section {
   padding: 60px 0;