diff --git a/Profice WebSite/index.html b/Profice WebSite/index.html
index ceb3933..c72a8c7 100644
--- a/Profice WebSite/index.html	
+++ b/Profice WebSite/index.html	
@@ -74,7 +74,7 @@
                 <a href="#systeme" class="nav-link">Systeme</a>
                 <a href="#qualification" class="nav-link">Für wen?</a>
                 <a href="#process" class="nav-link">Prozess</a>
-                <a href="#interaction" class="nav-link">Kontakt</a>
+                <a href="#demo-section" class="nav-link">Kontakt</a>
             </nav>
         </div>
         
@@ -179,7 +179,7 @@
                     </div>
                     <h3>KI-Telefonassistent</h3>
                     <p>Rufen Sie jetzt an und erleben Sie, wie unsere KI Ihr Anliegen aufnimmt und verarbeitet.</p>
-                    <button class="demo-btn" id="demoPhoneBtn">Jetzt anrufen</button>
+                    <a href="tel:+49123456789" class="demo-btn" id="demoPhoneBtn">Jetzt anrufen</a>
                     <span class="demo-note">Kostenlos · Keine Wartezeit · 24/7</span>
                 </div>
 
diff --git a/Profice WebSite/scripts/script.js b/Profice WebSite/scripts/script.js
index c2f113e..631eee2 100644
--- a/Profice WebSite/scripts/script.js	
+++ b/Profice WebSite/scripts/script.js	
@@ -73,6 +73,87 @@ document.addEventListener("DOMContentLoaded", function() {
     
     initButtonNavigation();
     
+    // ==========================================
+    // 1.6. PHONE CALL FUNCTIONALITY
+    // ==========================================
+    
+    function initPhoneCallFunctionality() {
+        const demoPhoneBtn = document.getElementById('demoPhoneBtn');
+        
+        if (demoPhoneBtn) {
+            demoPhoneBtn.addEventListener('click', function(e) {
+                // Check if mobile device
+                const isMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent);
+                
+                if (!isMobile) {
+                    e.preventDefault();
+                    
+                    // Show desktop fallback message
+                    const phoneNumber = '+49 123 456789';
+                    const message = `Bitte rufen Sie uns direkt an: ${phoneNumber}\n\nOder nutzen Sie das Kontaktformular für eine schriftliche Anfrage.`;
+                    
+                    // Create a custom modal instead of alert
+                    const modal = document.createElement('div');
+                    modal.style.cssText = `
+                        position: fixed;
+                        top: 0;
+                        left: 0;
+                        width: 100%;
+                        height: 100%;
+                        background: rgba(0,0,0,0.5);
+                        display: flex;
+                        align-items: center;
+                        justify-content: center;
+                        z-index: 10000;
+                        font-family: system-ui, -apple-system, sans-serif;
+                    `;
+                    
+                    modal.innerHTML = `
+                        <div style="
+                            background: white;
+                            padding: 2rem;
+                            border-radius: 12px;
+                            max-width: 400px;
+                            margin: 1rem;
+                            text-align: center;
+                            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
+                        ">
+                            <h3 style="margin: 0 0 1rem 0; color: #333;">Telefonnummer</h3>
+                            <p style="margin: 0 0 1.5rem 0; color: #666; line-height: 1.6;">${message}</p>
+                            <button style="
+                                background: #10b981;
+                                color: white;
+                                border: none;
+                                padding: 0.75rem 1.5rem;
+                                border-radius: 6px;
+                                cursor: pointer;
+                                font-size: 1rem;
+                            ">OK</button>
+                        </div>
+                    `;
+                    
+                    document.body.appendChild(modal);
+                    
+                    // Close modal on click
+                    modal.addEventListener('click', function(e) {
+                        if (e.target === modal || e.target.tagName === 'BUTTON') {
+                            document.body.removeChild(modal);
+                        }
+                    });
+                    
+                    // Auto-close after 5 seconds
+                    setTimeout(() => {
+                        if (document.body.contains(modal)) {
+                            document.body.removeChild(modal);
+                        }
+                    }, 5000);
+                }
+            });
+        }
+    }
+    
+    initPhoneCallFunctionality();
+    
     // ==========================================
     // 2. MENU TOGGLE
     // ==========================================