feat:bg

src/contents/attributions.tsx

src/contents/collaboration.tsx

src/contents/contribution.tsx

src/contents/description.tsx

src/contents/design.tsx

src/contents/education.tsx

src/contents/engineering.tsx

src/contents/experiments.tsx

src/contents/human-practices.tsx

src/contents/inclusivity.tsx

src/contents/model.tsx

src/contents/parts.tsx

src/contents/results.tsx

src/contents/safety.tsx

src/contents/team.tsx