feat(new home): update new homepage style and seo

[lightningtgc]

update style and seo

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions]

FastGPT Homepage Preview

🚀 FastGPT Homepage Preview Ready!

📱 Preview URL: https://de8a08db.fastgpt-home.pages.dev

🔗 👀 Click here to visit preview

---

💡 This preview will be automatically updated when you push new commits to this PR.