Create a polished ICLR-style Figure 1 for an imaginary method called
"Hierarchical Memory Routing for Long-Context Multimodal Reasoning
(HMR)". The top band shows the failure mode of naive long-context
multimodal processing: one overcrowded horizontal token stream mixing
text, image patches, retrieved documents, tool traces, and audio
snippets, with red-orange warning accents for interference, attention
dilution, memory collision, and quadratic compute cost. A clean
horizontal divider separates the main lower panel, which presents the
HMR framework as a spacious modular loop. Center: a Reasoning Controller
with stages Observe_t to Update_t. Left: a three-level Memory Hierarchy
with working cache, episodic memory, and semantic knowledge base. Right:
Multimodal Streams entering selectively through routing paths. Bottom
right: sparse experts activated only when needed. White background,
vector-clean styling, neutral gray plus cool accents, minimal but
legible labels, conference-paper clarity, no poster aesthetics.