airbnb-ish material landing page for online academy, skeleton loading cards, static mock courses only

airbnb-ish material landing page for online academy, skeleton loading cards, static mock courses only: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). airbnb-ish material landing page for online academy, skeleton loading cards, static mock courses only