diff --git a/web/src/assets/styles/components/travel-request-detail-hero.css b/web/src/assets/styles/components/travel-request-detail-hero.css
new file mode 100644
index 0000000..3dd997f
--- /dev/null
+++ b/web/src/assets/styles/components/travel-request-detail-hero.css
@@ -0,0 +1,289 @@
+.hero-banner {
+  display: grid;
+  gap: 0;
+}
+
+.hero-banner-main {
+  display: grid;
+  grid-template-columns: minmax(260px, 1.1fr) minmax(0, 2fr);
+  align-items: center;
+  gap: 16px;
+  min-height: 104px;
+}
+
+.applicant-card {
+  display: grid;
+  grid-template-columns: 88px minmax(0, 1fr);
+  align-items: center;
+  gap: 18px;
+  min-width: 0;
+}
+
+.portrait {
+  width: 88px;
+  height: 88px;
+  overflow: hidden;
+  border: 1px solid #e2e8f0;
+  border-radius: 999px;
+  background: #f8fafc;
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .9);
+}
+
+.portrait img {
+  width: 100%;
+  height: 100%;
+  display: block;
+  object-fit: cover;
+}
+
+.applicant-copy {
+  min-width: 0;
+  display: grid;
+  gap: 14px;
+}
+
+.applicant-name-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px;
+}
+
+.applicant-card h2 {
+  color: #0f172a;
+  font-size: 20px;
+  font-weight: 900;
+  line-height: 1.2;
+}
+
+.identity-badge {
+  display: inline-flex;
+  align-items: center;
+  min-height: 24px;
+  padding: 0 9px;
+  border-radius: 4px;
+  background: var(--theme-primary-soft);
+  border: 1px solid rgba(var(--theme-primary-rgb), .16);
+  color: var(--theme-primary-active);
+  font-size: 11px;
+  font-weight: 800;
+}
+
+.applicant-profile-meta {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: flex-start;
+  gap: 12px 28px;
+}
+
+.applicant-profile-meta__org {
+  display: grid;
+  gap: 6px;
+  min-width: 0;
+}
+
+.applicant-profile-meta__role {
+  display: inline-flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px 0;
+  min-width: 0;
+}
+
+.applicant-meta-item {
+  min-width: 0;
+  position: relative;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  color: #475569;
+  font-size: 13px;
+  line-height: 1.5;
+}
+
+.applicant-profile-meta__role .applicant-meta-item + .applicant-meta-item {
+  margin-left: 16px;
+}
+
+.applicant-profile-meta__role .applicant-meta-item + .applicant-meta-item::before {
+  content: "/";
+  position: absolute;
+  left: -10px;
+  color: #cbd5e1;
+  font-size: 12px;
+}
+
+.applicant-meta-item--sub strong {
+  font-weight: 750;
+}
+
+.applicant-meta-item em {
+  font-style: normal;
+  color: #64748b;
+  flex-shrink: 0;
+}
+
+.applicant-meta-item strong {
+  color: #0f172a;
+  font-weight: 800;
+}
+
+.hero-fact-grid {
+  display: grid;
+  grid-template-columns: minmax(240px, 1.25fr) repeat(3, minmax(0, 1fr));
+  gap: 0;
+}
+
+.hero-fact {
+  display: grid;
+  align-content: center;
+  gap: 8px;
+  min-width: 0;
+  min-height: 92px;
+  padding: 8px 22px;
+  background: transparent;
+  border-left: 1px solid #eaf0f6;
+}
+
+.hero-fact:first-child {
+  border-left: 0;
+}
+
+.hero-fact-label {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  color: #64748b;
+  font-size: 11px;
+  font-weight: 800;
+  letter-spacing: .03em;
+  text-transform: uppercase;
+}
+
+.hero-fact-label i {
+  font-size: 15px;
+  color: #94a3b8;
+}
+
+.hero-fact strong {
+  min-width: 0;
+  max-width: 100%;
+  color: #0f172a;
+  font-size: 16px;
+  font-weight: 800;
+  line-height: 1.4;
+  overflow-wrap: anywhere;
+  white-space: nowrap;
+}
+
+.hero-fact:first-child strong {
+  font-size: 15px;
+}
+
+.hero-fact strong.amount {
+  font-size: 22px;
+  font-weight: 900;
+}
+
+.hero-fact strong.status {
+  color: #f97316;
+}
+
+@media (max-width: 1320px) {
+  .hero-banner-main {
+    grid-template-columns: 1fr;
+    gap: 16px;
+    min-height: 0;
+  }
+
+  .hero-fact-grid {
+    grid-template-columns: minmax(280px, 1.4fr) repeat(3, minmax(0, 1fr));
+    overflow: visible;
+  }
+
+  .hero-fact {
+    min-width: 0;
+    padding-inline: 16px;
+  }
+
+  .hero-fact strong {
+    white-space: nowrap;
+    word-break: normal;
+  }
+}
+
+@media (max-width: 760px) {
+  .hero-banner-main,
+  .hero-fact-grid,
+  .applicant-card {
+    min-width: 0;
+    max-width: 100%;
+  }
+
+  .applicant-card {
+    grid-template-columns: 60px minmax(0, 1fr);
+    gap: 12px;
+  }
+
+  .portrait {
+    width: 60px;
+    height: 60px;
+  }
+
+  .applicant-copy {
+    gap: 8px;
+  }
+
+  .applicant-card h2 {
+    font-size: 16px;
+  }
+
+  .applicant-profile-meta {
+    display: grid;
+    gap: 10px;
+  }
+
+  .applicant-profile-meta__role {
+    display: grid;
+    gap: 6px;
+  }
+
+  .applicant-profile-meta__role .applicant-meta-item + .applicant-meta-item {
+    margin-left: 0;
+  }
+
+  .applicant-profile-meta__role .applicant-meta-item + .applicant-meta-item::before {
+    content: none;
+  }
+
+  .hero-fact-grid {
+    grid-template-columns: 1fr 1fr;
+    gap: 0;
+    overflow: hidden;
+    border-top: 1px solid #edf2f7;
+  }
+
+  .hero-fact {
+    min-width: 0;
+    min-height: 78px;
+    padding: 14px 12px 12px;
+    border-left: 0;
+    border-bottom: 1px solid #edf2f7;
+  }
+
+  .hero-fact:nth-child(2n) {
+    border-left: 1px solid #edf2f7;
+  }
+
+  .hero-fact:last-child:nth-child(odd) {
+    grid-column: 1 / -1;
+  }
+
+  .hero-fact:nth-last-child(-n + 2) {
+    border-bottom: 0;
+  }
+
+  .hero-fact strong {
+    white-space: normal;
+  }
+}
diff --git a/web/src/assets/styles/components/travel-request-progress-card.css b/web/src/assets/styles/components/travel-request-progress-card.css
new file mode 100644
index 0000000..7bbb601
--- /dev/null
+++ b/web/src/assets/styles/components/travel-request-progress-card.css
@@ -0,0 +1,228 @@
+.progress-block {
+  min-width: 0;
+  max-width: 100%;
+  padding-top: 0;
+  border-top: 0;
+}
+
+.progress-head {
+  display: flex;
+  align-items: center;
+  justify-content: flex-start;
+  margin-bottom: 12px;
+}
+
+.progress-head h3 {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  color: #0f172a;
+  font-size: 14px;
+  font-weight: 850;
+}
+
+.progress-head h3::before {
+  content: "";
+  width: 8px;
+  height: 8px;
+  border-radius: 999px;
+  background: var(--theme-primary);
+  box-shadow: 0 0 0 4px var(--theme-focus-ring);
+}
+
+.progress-line {
+  width: 100%;
+  min-width: 0;
+  max-width: 100%;
+  grid-column: 1 / -1;
+  display: grid;
+  grid-template-columns: repeat(var(--progress-columns, 5), minmax(118px, 1fr));
+  overflow-x: auto;
+  overscroll-behavior-x: contain;
+  padding: 4px 2px 2px;
+}
+
+.progress-step {
+  position: relative;
+  display: grid;
+  grid-template-rows: 26px minmax(62px, auto);
+  justify-items: center;
+  align-items: start;
+  gap: 10px;
+  min-width: 0;
+  padding: 0 6px;
+  color: #94a3b8;
+}
+
+.progress-step::before,
+.progress-step::after {
+  content: "";
+  position: absolute;
+  top: 13px;
+  left: 0;
+  right: 0;
+  z-index: 0;
+  height: 2px;
+}
+
+.progress-step::before {
+  background: #dbe4ee;
+}
+
+.progress-step::after {
+  background: var(--theme-primary);
+  opacity: 0;
+}
+
+.progress-step.done::after {
+  opacity: 1;
+}
+
+.progress-step.current::after {
+  right: 50%;
+  opacity: 1;
+}
+
+.progress-step:first-child::before,
+.progress-step:first-child.done::after {
+  left: 50%;
+}
+
+.progress-step:first-child.current::after {
+  left: 50%;
+  right: 50%;
+}
+
+.progress-step:last-child::before,
+.progress-step:last-child::after {
+  right: 50%;
+}
+
+.progress-step span {
+  position: relative;
+  z-index: 1;
+  width: 24px;
+  height: 24px;
+  display: grid;
+  place-items: center;
+  border-radius: 999px;
+  background: #e2e8f0;
+  color: #64748b;
+  font-size: 13px;
+  font-weight: 900;
+}
+
+.current-progress-ring {
+  position: absolute;
+  inset: -4px;
+  z-index: -1;
+  border: 2px solid rgba(var(--theme-primary-rgb), .42);
+  border-radius: 999px;
+  pointer-events: none;
+}
+
+.progress-step.active span {
+  background: var(--theme-primary-active);
+  color: #fff;
+}
+
+.progress-step.current span {
+  background: var(--theme-primary) !important;
+  color: #fff !important;
+  box-shadow: 0 0 0 4px var(--theme-focus-ring) !important;
+  animation: breathe-dot 3.2s ease-in-out infinite !important;
+  transform-origin: center !important;
+}
+
+@keyframes breathe-dot {
+  0%, 100% {
+    transform: scale(1);
+    box-shadow: 0 4px 12px rgba(var(--theme-primary-rgb), .3), 0 0 0 4px var(--theme-focus-ring);
+  }
+
+  50% {
+    transform: scale(1.12);
+    box-shadow: 0 4px 20px rgba(var(--theme-primary-rgb), .5), 0 0 0 10px rgba(var(--theme-primary-rgb), .08);
+  }
+}
+
+.progress-step strong {
+  color: #334155;
+  font-size: 12px;
+  line-height: 1.35;
+  text-align: center;
+}
+
+.progress-step.current strong {
+  color: var(--theme-primary-active);
+}
+
+.progress-step-copy {
+  width: 100%;
+  min-width: 0;
+  display: grid;
+  justify-items: center;
+  align-content: start;
+  gap: 6px;
+}
+
+.progress-step-status {
+  box-sizing: border-box;
+  width: 100%;
+  max-width: 136px;
+  min-width: 0;
+  min-height: 22px;
+  display: block;
+  padding: 0 9px;
+  border: 1px solid #e2e8f0;
+  border-radius: 4px;
+  background: #f8fafc;
+  color: #64748b;
+  font-size: 11px;
+  font-weight: 850;
+  line-height: 20px;
+  text-align: center;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.progress-step.done .progress-step-status {
+  border-color: rgba(var(--theme-primary-rgb), .2);
+  background: var(--theme-primary-soft);
+  color: var(--theme-primary-active);
+}
+
+.progress-step.current .progress-step-status {
+  border-color: rgba(var(--theme-primary-rgb), .22);
+  background: var(--theme-primary);
+  color: #fff;
+  box-shadow: 0 8px 18px var(--theme-primary-shadow);
+}
+
+.progress-step:not(.done):not(.current) .progress-step-status {
+  background: #f8fafc;
+  color: #94a3b8;
+}
+
+.progress-step.current small {
+  color: var(--theme-primary-active);
+}
+
+.progress-step-meta {
+  display: block;
+  width: 100%;
+  min-height: 16px;
+  color: #64748b;
+  font-size: 11px;
+  font-style: normal;
+  line-height: 1.35;
+  text-align: center;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.progress-step.current .progress-step-meta {
+  color: #475569;
+}
diff --git a/web/src/assets/styles/components/travel-request-related-application-card.css b/web/src/assets/styles/components/travel-request-related-application-card.css
new file mode 100644
index 0000000..592164f
--- /dev/null
+++ b/web/src/assets/styles/components/travel-request-related-application-card.css
@@ -0,0 +1,127 @@
+.detail-card-head {
+  min-width: 0;
+  max-width: 100%;
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 16px;
+  margin-bottom: 14px;
+}
+
+.detail-card-head h3 {
+  margin: 0 0 4px;
+  color: #0f172a;
+  font-size: 16px;
+  font-weight: 850;
+}
+
+.detail-card-head p {
+  margin: 0;
+  color: #64748b;
+  font-size: 12px;
+  line-height: 1.5;
+}
+
+.application-detail-facts {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  margin-top: 4px;
+  overflow: hidden;
+  border: 1px solid #e2e8f0;
+  border-radius: 4px;
+  background: #fff;
+}
+
+.application-detail-fact {
+  display: grid;
+  grid-template-columns: minmax(96px, 28%) minmax(0, 1fr);
+  min-height: 48px;
+  border-top: 1px solid #edf2f7;
+  border-left: 1px solid #edf2f7;
+}
+
+.application-detail-fact:nth-child(-n + 2) {
+  border-top: 0;
+}
+
+.application-detail-fact:nth-child(2n + 1) {
+  border-left: 0;
+}
+
+.application-detail-fact span,
+.application-detail-fact strong {
+  display: flex;
+  align-items: center;
+  min-width: 0;
+  padding: 11px 14px;
+  line-height: 1.5;
+}
+
+.application-detail-fact span {
+  background: #f8fafc;
+  color: #64748b;
+  font-size: 12px;
+  font-weight: 800;
+}
+
+.application-detail-fact strong {
+  border-left: 1px solid #edf2f7;
+  color: #0f172a;
+  font-size: 13px;
+  font-weight: 750;
+  overflow-wrap: anywhere;
+}
+
+.application-detail-fact.highlight span {
+  background: var(--theme-primary-soft);
+  color: var(--theme-primary-active);
+}
+
+.application-detail-fact.highlight strong {
+  background: color-mix(in srgb, var(--theme-primary-soft) 55%, #ffffff);
+}
+
+.application-detail-fact.emphasis strong {
+  color: var(--theme-primary-active);
+  font-weight: 850;
+}
+
+.related-application-facts {
+  margin-top: 0;
+}
+
+.related-application-empty {
+  display: grid;
+  gap: 6px;
+  padding: 13px 14px;
+  border: 1px solid #e2e8f0;
+  border-radius: 4px;
+  background: #f8fafc;
+}
+
+.related-application-empty strong {
+  color: #334155;
+  font-size: 13px;
+  font-weight: 850;
+}
+
+.related-application-empty p {
+  margin: 0;
+  color: #64748b;
+  font-size: 12px;
+  line-height: 1.6;
+}
+
+@media (max-width: 760px) {
+  .application-detail-facts {
+    grid-template-columns: 1fr;
+  }
+
+  .application-detail-fact {
+    border-left: 0;
+  }
+
+  .application-detail-fact:nth-child(2) {
+    border-top: 1px solid #edf2f7;
+  }
+}
diff --git a/web/src/components/travel/TravelRequestDetailHero.vue b/web/src/components/travel/TravelRequestDetailHero.vue
index e48a157..bbf9c4a 100644
--- a/web/src/components/travel/TravelRequestDetailHero.vue
+++ b/web/src/components/travel/TravelRequestDetailHero.vue
@@ -55,3 +55,5 @@ defineProps({
   heroFactItems: { type: Array, default: () => [] }
 })
 </script>
+
+<style scoped src="../../assets/styles/components/travel-request-detail-hero.css"></style>
diff --git a/web/src/components/travel/TravelRequestProgressCard.vue b/web/src/components/travel/TravelRequestProgressCard.vue
index 8478491..a304949 100644
--- a/web/src/components/travel/TravelRequestProgressCard.vue
+++ b/web/src/components/travel/TravelRequestProgressCard.vue
@@ -41,3 +41,5 @@ defineProps({
   currentProgressRingMotion: { type: Object, required: true }
 })
 </script>
+
+<style scoped src="../../assets/styles/components/travel-request-progress-card.css"></style>
diff --git a/web/src/components/travel/TravelRequestRelatedApplicationCard.vue b/web/src/components/travel/TravelRequestRelatedApplicationCard.vue
index ccecdc3..c897f5c 100644
--- a/web/src/components/travel/TravelRequestRelatedApplicationCard.vue
+++ b/web/src/components/travel/TravelRequestRelatedApplicationCard.vue
@@ -30,3 +30,5 @@ defineProps({
   relatedApplicationFactItems: { type: Array, default: () => [] }
 })
 </script>
+
+<style scoped src="../../assets/styles/components/travel-request-related-application-card.css"></style>
diff --git a/web/tests/travel-request-detail-risk-advice.test.mjs b/web/tests/travel-request-detail-risk-advice.test.mjs
index 1bd5c96..487e256 100644
--- a/web/tests/travel-request-detail-risk-advice.test.mjs
+++ b/web/tests/travel-request-detail-risk-advice.test.mjs
@@ -119,6 +119,10 @@ const stageRiskAdviceStyles = readFileSync(
   fileURLToPath(new URL('../src/assets/styles/components/stage-risk-advice-card.css', import.meta.url)),
   'utf8'
 )
+const detailHeroTemplate = readFileSync(
+  fileURLToPath(new URL('../src/components/travel/TravelRequestDetailHero.vue', import.meta.url)),
+  'utf8'
+)
 const relatedApplicationCardTemplate = readFileSync(
   fileURLToPath(new URL('../src/components/travel/TravelRequestRelatedApplicationCard.vue', import.meta.url)),
   'utf8'
@@ -1055,6 +1059,21 @@ test('related application information is shown above expense details for reimbur
   assert.doesNotMatch(detailViewTemplate, /v-model="detailNoteEditorView"/)
 })
 
+test('split detail page header cards keep their scoped styles', () => {
+  assert.match(
+    detailHeroTemplate,
+    /<style scoped src="\.\.\/\.\.\/assets\/styles\/components\/travel-request-detail-hero\.css"><\/style>/
+  )
+  assert.match(
+    progressCardTemplate,
+    /<style scoped src="\.\.\/\.\.\/assets\/styles\/components\/travel-request-progress-card\.css"><\/style>/
+  )
+  assert.match(
+    relatedApplicationCardTemplate,
+    /<style scoped src="\.\.\/\.\.\/assets\/styles\/components\/travel-request-related-application-card\.css"><\/style>/
+  )
+})
+
 test('detail note model is retained for risk override persistence', () => {
   assert.match(detailViewScript, /const canEditDetailNote = computed\(\(\) => isDraftRequest\.value\)/)
   assert.match(detailViewScript, /function normalizeDetailNoteDraftValue\(value\)/)