Mission statement, extendable

• Mission statement in extendable headline

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 <div>
-    <h1>Federated IT for Science</h1>
-    <p>HIFIS ensures an excellent information environment for outstanding research in all Helmholtz research fields.</p>
+    <h1>Helmholtz IT for Science</h1>
+    <details class="my-3">
+        <summary>
+            <strong>HIFIS builds and sustains an excellent IT infrastructure connecting all Helmholtz research fields
+                and centres.</strong>
+        </summary>
+        <div>
+            <p>
+                This includes a secure and easy-to-use collaborative environment with efficiently accessible IT services
+                from anywhere.
+                HIFIS further supports Research Software Engineering (RSE) with a high level of quality, visibility and
+                sustainability.
+            </p>
+            <p>
+                The HIFIS clusters develop technologies, processes and policy frameworks for harmonized access to
+                fundamental backbone services, such as Helmholtz AAI, and Helmholtz Cloud services. HIFIS Software also
+                provides education, technology, consulting and community services.
+            </p>
+        </div>
+    </details>
 </div>
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