Landing page: say what rugnux does with the methods it builds on

The credits paragraph framed the software as existing algorithms
reimplemented and moved to the GPU. That undersells the work: the
methods are taken further (hypotheses carried forward and decided on
the evidence, data-driven decisions instead of fixed thresholds,
autodetection so a bare invocation gives the best answer). Reword the
one sentence along the lines of the preprint's own introduction, keeping
the credit to the community's methods and the acknowledgements link.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HVeDQqrcrEZy6XBUCMZvyT

docs/landing/index.html

@@ -204,10 +204,10 @@ try { var t = localStorage.getItem("jfj-theme"); if (t) document.documentElement
   included; modified versions that are distributed must be released under the same licence. The released binaries bundle third-party components under GPL-compatible licences, and the
   CUDA builds the NVIDIA CUDA runtime under NVIDIA's EULA: see the
   <a href="THIRD_PARTY_NOTICES.html">third-party notices</a>.</p>
-  <p>The software builds on many existing algorithms, reimplemented (see the
-  <a href="ACKNOWLEDGEMENT.html">acknowledgements</a>), many of them moved to the GPU and made faster
-  across a range of computing configurations; it was developed with the help of generative AI
-  (Claude Opus, Anthropic).</p>
+  <p>The software builds on decades of developments in the crystallographic community (see the
+  <a href="ACKNOWLEDGEMENT.html">acknowledgements</a>), taken further in one GPU-accelerated program
+  whose automated decisions are validated against the diffraction data; it was developed with the
+  help of generative AI (Claude Opus, Anthropic).</p>
 </section>
 
 </main>