index: also use cards for the landingpage

source/index.rst

@@ -1,9 +1,64 @@
 Nitrokey Documentation
 ======================
 
+.. card:: Nitrokeys
+    :link: components/nitrokeys/index
+    :link-type: doc
+
+    Open-Source security tokens for your personal and business needs
+
+.. card:: Nitropad
+    :link: components/nitropad/index
+    :link-type: doc
+
+    Wide range of coreboot firmware based laptops
+
+.. card:: NitroPC
+    :link: components/nitropc/index
+    :link-type: doc
+
+    The open-source firmware equipped PC for your desk
+
+.. card:: Nitrophone
+    :link: components/nitrophone/index
+    :link-type: doc
+
+    Top-tier hardware equipped with the most secure smartphone OS
+
+.. card:: NextBox
+    :link: components/nextbox/index
+    :link-type: doc
+
+    Private, low-to-no administration home cloud - Nextcloud in your own hands
+
+.. card:: NetHSM
+    :link: components/nethsm/index
+    :link-type: doc
+
+    The trustworthy, open hardware security module that just works
+
+.. card:: Nitrowall NW678, NW4J3
+    :link: components/nitrowall/index
+    :link-type: doc
+
+    Network PCs for firwalls, routing and a more secure home network
+
+.. card:: Nitrowall NW750
+    :link: components/nitrowall/nw750/index
+    :link-type: doc
+
+    Never use open WiFis again, just get your own mobile Wifi
+
+.. card:: Software
+    :link: components/software/index
+    :link-type: doc
+
+    Software and SDK documentation - NitrokeyApp2 is here!
+
 .. toctree::
-   :maxdepth: 1
-   :titlesonly:
+   :maxdepth: 3
+   :glob:
+   :hidden:
 
    components/nitrokeys/index
    components/nitropad/index