update UI from Figma Design

[lzh12311]

1. Updated UI from Figma design.

   51

[Xinlong-Wu]

please list the issue that you have fixed before merge

eg.:

• https://github.com/24-S1-2-C-Moral-Decisions/moral-front-end/pull/34
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/68

[Valencia-Choi]

Fixed following issues:

• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/83
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/84
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/85
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/86
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/87
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/88
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/89
• https://github.com/24-S1-2-C-Moral-Decisions/LandingSite/issues/90