Planet textures: Solar System Scope / INOVE
Source: https://www.solarsystemscope.com/textures/
License: Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/

Files used: 2k_earth_daymap.jpg, 2k_earth_nightmap.jpg,
2k_earth_clouds.jpg, 2k_jupiter.jpg, 2k_saturn.jpg,
2k_saturn_ring_alpha.png.
Modifications: resized and converted to WebP for this website.
The maps are rendered on 3D spheres using Three.js (MIT license).

UI visual reference: globe lighting, subdued night-city detail,
and depth in the Polaris login page; no business data is included.

Brand icons: Simple Icons v14.14.0 (CC0)
Source: https://github.com/simple-icons/simple-icons/tree/14.14.0
Icons used: Gitee, GitHub. Colors adjusted for the dark background.
Gitee icon labels the technical blog link as requested; the blog is hosted on CSDN.