Time series forecasting faces significant challenges due to non-stationary components that obscure underlying patterns. While Transformer-based models are effective at capturing stationary components, they struggle with non-stationary dynamics and multivariate dependencies. In this paper, we proposeFreqEvo, a lightweight Frequency Domain Feature Enhancement module for time series forecasting.FreqEvoprogressively filters frequency components from high to low amplitude, ensuring the preservation of informative features while reducing noise. By integrating recursive Fourier-based residual modeling and cross-domain attention,FreqEvoeffectively refines low-amplitude frequency features and stabilizes the embeddings, outperforming traditional low-pass filtering and random frequency selection methods in capturing both short-term and long-term dependencies. Experimental results on benchmark datasets demonstrate thatFreqEvooutperforms state-of-the-art (SOTA) models and serves as a plug-and-play module to enhance existing Long-Term Sequence Forecasting (LSTF) models.

Predicting the popularity of social media videos involves estimating user engagement based on rich multimodal information embedded within the posts. Unlike static images, videos incorporate temporally evolving visual signals that, alongside associated metadata such as descriptions, hashtags, timestamps, and user attributes, offer valuable insights into their potential audience reach. Prior approaches typically extract features from different modalities independently and merge them via naïve concatenation, which overlooks the semantic discrepancy and interaction dynamics across modalities. To address these limitations, we propose a feature fusion framework that encodes and aligns video content and associated textual cues into a shared semantic space. By jointly modeling temporally structured visual features with context-aware textual embeddings, our method effectively captures cross-modal correlations that are crucial for discerning content virality patterns. In addition, we incorporate user-centric behavioral profiles and content creation dynamics, enriching the representation with personalized signals that reflect audience-specific preferences. Notably, our method achieves top-tier performance in the 2025 SMP challenge, ranking among the highest-performing entries. This strong empirical result underscores the value of deep semantic alignment across video, text, and user domains in accurately forecasting social media video popularity.