diff --git a/next.config.mjs b/next.config.mjs
index 87f8b205..fb48f7df 100644
--- a/next.config.mjs
+++ b/next.config.mjs
@@ -7,6 +7,7 @@ const nextConfig = {
   distDir: process.env.NEXT_DIST_DIR || '.next',
   ...(process.env.NEXT_OUTPUT_STANDALONE === '1' ? { output: 'standalone' } : {}),
   images: {
+    minimumCacheTTL: 14400,
     remotePatterns: [
       new URL(`${allowedImageHost}/**`),
       // YouTube video thumbnails (campaign home content board, S2) come from
diff --git a/public/JOA00162.avif b/public/JOA00162.avif
index d39c3ae0..548380d2 100644
Binary files a/public/JOA00162.avif and b/public/JOA00162.avif differ
diff --git a/public/Jeronimo.avif b/public/Jeronimo.avif
index 9e4cbdc2..f9b79d29 100644
Binary files a/public/Jeronimo.avif and b/public/Jeronimo.avif differ
diff --git a/public/Lula.avif b/public/Lula.avif
index 23d974e0..6ac065e8 100644
Binary files a/public/Lula.avif and b/public/Lula.avif differ
diff --git a/public/RUI - 2-2.avif b/public/RUI - 2-2.avif
index 7a31aaf3..e0c0e424 100644
Binary files a/public/RUI - 2-2.avif and b/public/RUI - 2-2.avif differ
diff --git a/public/WAGNER - 2-9 final.avif b/public/WAGNER - 2-9 final.avif
index a292d15b..fce44019 100644
Binary files a/public/WAGNER - 2-9 final.avif and b/public/WAGNER - 2-9 final.avif differ
diff --git a/src/components/CampaignHero.tsx b/src/components/CampaignHero.tsx
index 4585a8d5..ff620a11 100644
--- a/src/components/CampaignHero.tsx
+++ b/src/components/CampaignHero.tsx
@@ -5,31 +5,32 @@ const SUPPORT_URL = 'https://apoiar.me/jorgesolla'
 const allyImages = [
   {
     id: 'rui',
-    src: '/RUI%20-%202-2.avif',
+    src: '/RUI - 2-2.avif',
     width: 177,
     height: 265,
-    sizes: '(min-width: 1366px) calc(6.14vw + 93px), 177px',
+    sizes: '(min-width: 1920px) 211px, (min-width: 1366px) calc(6.14vw + 93px), 177px',
   },
   {
     id: 'wagner',
-    src: '/WAGNER%20-%202-9%20final.avif',
+    src: '/WAGNER - 2-9 final.avif',
     width: 177,
     height: 265,
-    sizes: '(min-width: 1366px) calc(6.14vw + 93px), 177px',
+    sizes: '(min-width: 1920px) 211px, (min-width: 1366px) calc(6.14vw + 93px), 177px',
   },
   {
     id: 'jeronimo',
     src: '/Jeronimo.avif',
     width: 177,
     height: 265,
-    sizes: '(min-width: 1366px) calc(6.14vw + 93px), 177px',
+    sizes: '(min-width: 1920px) 211px, (min-width: 1366px) calc(6.14vw + 93px), 177px',
   },
   {
     id: 'lula',
     src: '/Lula.avif',
     width: 216,
     height: 213,
-    sizes: '(min-width: 1366px) calc(8.3vw + 125px), (min-width: 1024px) 238px, 216px',
+    sizes:
+      '(min-width: 1920px) 284px, (min-width: 1366px) calc(8.3vw + 124.6px), (min-width: 1024px) 238px, 216px',
   },
 ]
 
@@ -71,7 +72,7 @@ export const CampaignHero = () => (
           alt="Jorge Solla, candidato a deputado federal pela Bahia"
           width={495}
           height={742}
-          sizes="(min-width: 1720px) 747px, (min-width: 1280px) 595px, (min-width: 1024px) 495px, 449px"
+          sizes="(min-width: 1920px) 747px, (min-width: 1024px) calc(28.16vw + 206.7px), 449px"
           priority
           className="campaign-hero-portrait-image absolute h-auto max-w-none object-contain"
         />
diff --git a/tests/unit/campaignHero.unit.spec.tsx b/tests/unit/campaignHero.unit.spec.tsx
index 73883bcd..8af5108e 100644
--- a/tests/unit/campaignHero.unit.spec.tsx
+++ b/tests/unit/campaignHero.unit.spec.tsx
@@ -31,6 +31,19 @@ describe('CampaignHero', () => {
     expect(novidadesLink.getAttribute('data-cta')).toBe('secondary')
   })
 
+  it('não percent-encoda os caminhos das imagens', () => {
+    const { container } = render(<CampaignHero />)
+
+    const sources = Array.from(container.querySelectorAll('img')).map((image) =>
+      image.getAttribute('src'),
+    )
+    expect(sources.length).toBeGreaterThan(0)
+
+    for (const source of sources) {
+      expect(source).not.toContain('%')
+    }
+  })
+
   it('expõe as provas e as fotos com nomes acessíveis', () => {
     render(<CampaignHero />)
 
diff --git a/tests/unit/imageDelivery.unit.spec.ts b/tests/unit/imageDelivery.unit.spec.ts
new file mode 100644
index 00000000..021af680
--- /dev/null
+++ b/tests/unit/imageDelivery.unit.spec.ts
@@ -0,0 +1,72 @@
+// @vitest-environment node
+
+import { existsSync, readFileSync, readdirSync } from 'node:fs'
+import { join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+import sharp from 'sharp'
+import { describe, expect, it } from 'vitest'
+
+const MAX_WIDTH = 1600
+const MAX_HEIGHT = 2400
+
+const LOCAL_IMAGE_REF = /src[=:]\s*['"](\/[^'"`]+\.(?:avif|webp|png|jpe?g))['"]/g
+
+const publicFile = (src: string) =>
+  fileURLToPath(new URL(`../../public${decodeURIComponent(src)}`, import.meta.url))
+
+const campaignHeroSource = readFileSync(
+  fileURLToPath(new URL('../../src/components/CampaignHero.tsx', import.meta.url)),
+  'utf8',
+)
+
+const localHeroAssets = [
+  ...new Set([...campaignHeroSource.matchAll(LOCAL_IMAGE_REF)].map(([, src]) => src)),
+]
+
+const collectSourceImageRefs = () => {
+  const refs = new Set<string>()
+  const srcDir = fileURLToPath(new URL('../../src', import.meta.url))
+
+  for (const entry of readdirSync(srcDir, { recursive: true, withFileTypes: true })) {
+    if (!entry.isFile() || !/\.(?:ts|tsx)$/.test(entry.name)) continue
+    const code = readFileSync(join(entry.parentPath, entry.name), 'utf8')
+    for (const [, src] of code.matchAll(LOCAL_IMAGE_REF)) refs.add(src)
+  }
+
+  return refs
+}
+
+describe('entrega das imagens do hero (perf do /_next/image)', () => {
+  it('usa masters no tamanho máximo de exibição, sem forçar decode de 3840px', async () => {
+    expect(localHeroAssets.length).toBeGreaterThanOrEqual(5)
+
+    for (const src of localHeroAssets) {
+      const { width, height } = await sharp(publicFile(src)).metadata()
+      expect(width, src).toBeLessThanOrEqual(MAX_WIDTH)
+      expect(height, src).toBeLessThanOrEqual(MAX_HEIGHT)
+    }
+  })
+
+  it('mantém todo asset local entregue via next/image dentro do orçamento', async () => {
+    const refs = [...collectSourceImageRefs()].filter((src) => existsSync(publicFile(src)))
+    expect(refs.length).toBeGreaterThan(0)
+
+    for (const src of refs) {
+      const { width, height } = await sharp(publicFile(src)).metadata()
+      expect(width, src).toBeLessThanOrEqual(MAX_WIDTH)
+      expect(height, src).toBeLessThanOrEqual(MAX_HEIGHT)
+    }
+  })
+
+  it('configura TTL longo para os derivados do otimizador', () => {
+    const nextConfig = readFileSync(
+      fileURLToPath(new URL('../../next.config.mjs', import.meta.url)),
+      'utf8',
+    )
+
+    const ttl = nextConfig.match(/minimumCacheTTL:\s*(\d+)/)
+    expect(ttl, 'next.config.mjs deve definir images.minimumCacheTTL').toBeTruthy()
+    expect(Number(ttl?.[1])).toBeGreaterThanOrEqual(3600)
+  })
+})