refactor: standardize background color to #121212

- Replaced inconsistent gray-900 and #171717 background colors with unified #121212 across all pages
- Removed unused imports from multiple component files
- Cleaned up trailing spaces in className attributes

src/pages/gpu/GpuDesign.tsx

@@ -1,5 +1,3 @@
-import { Container } from '@/components/Container'
-import { Eyebrow, H3, CT } from '@/components/Texts'
 import {
   BoltIcon,
   BanknotesIcon,

src/pages/gpu/GpuOverview.tsx

@@ -8,7 +8,6 @@ import {
 
 import { Container } from '@/components/Container'
 import { Eyebrow, SectionHeader, P } from '@/components/Texts'
-import { Button } from '@/components/Button'
 
 const coreFeatures = [
   {

src/pages/gpu/archive/GpuGettingStarted.tsx

@@ -42,7 +42,7 @@ export function GpuGettingStarted() {
   return (
     <section
       id="gpu-getting-started"
-      className="relative overflow-hidden bg-gray-900 py-24 sm:py-32"
+      className="relative overflow-hidden bg-[#121212]  py-24 sm:py-32"
     >
       <div className="absolute inset-0 bg-[radial-gradient(circle_at_top,rgba(34,211,238,0.12),transparent_60%)]" />
       <Container className="relative">