diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 38ddba9b..19aedb95 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -18,6 +18,7 @@ const session = useSessionStore();
 <style scoped>
 .app-shell {
   min-height: 100vh;
+  min-height: 100dvh;
 }
 
 .app-locked {
diff --git a/frontend/src/components/FaqCategoryPanel.vue b/frontend/src/components/FaqCategoryPanel.vue
index 21ee391d..23884d2e 100644
--- a/frontend/src/components/FaqCategoryPanel.vue
+++ b/frontend/src/components/FaqCategoryPanel.vue
@@ -1,5 +1,5 @@
 <template>
-  <el-card class="panel">
+  <div class="panel unified-shell">
     <div class="header">
       <span>{{ TEXT.common.labels.category }}</span>
       <div v-if="canMaintain">
@@ -23,7 +23,7 @@
       </el-menu-item>
     </el-menu>
     <FaqCategoryForm v-model="showForm" :category="editing" :is-admin="isAdmin" @success="emit('refresh')" />
-  </el-card>
+  </div>
 </template>
 
 <script setup lang="ts">
@@ -94,18 +94,24 @@ const onDelete = async (cat: FaqCategory) => {
 
 <style scoped>
 .panel {
-  padding: 0;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  overflow: hidden;
 }
+
 .header {
   display: flex;
   justify-content: space-between;
   align-items: center;
-  padding: 12px;
+  padding: 0 0 12px;
   border-bottom: 1px solid #ebeef5;
 }
+
 .menu {
   max-height: calc(100vh - 240px);
   overflow: auto;
+  border-right: 0;
 }
 .actions {
   margin-left: auto;
diff --git a/frontend/src/components/FaqList.vue b/frontend/src/components/FaqList.vue
index cf2859b8..05e533b7 100644
--- a/frontend/src/components/FaqList.vue
+++ b/frontend/src/components/FaqList.vue
@@ -1,5 +1,5 @@
 <template>
-  <el-table :data="items" v-loading="loading" style="width: 100%" @row-click="onRowClick">
+  <el-table :data="items" v-loading="loading" style="width: 100%" class="faq-table" @row-click="onRowClick">
     <el-table-column prop="question" :label="TEXT.common.fields.question" min-width="200">
       <template #default="scope">
         <el-link type="primary" :underline="false" class="question-link">
@@ -131,6 +131,10 @@ const remove = async (row: FaqItem) => {
 </script>
 
 <style scoped>
+.faq-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
 .danger {
   color: #f56c6c;
 }
diff --git a/frontend/src/components/Layout.vue b/frontend/src/components/Layout.vue
index 377466b7..f73115b5 100644
--- a/frontend/src/components/Layout.vue
+++ b/frontend/src/components/Layout.vue
@@ -195,8 +195,8 @@
         <div class="content-wrapper">
           <router-view v-slot="{ Component }">
             <transition name="fade-transform" mode="out-in">
-              <div class="ctms-route-shell">
-                <component :is="Component" />
+              <div :key="route.fullPath" class="ctms-route-shell">
+                <component :is="Component" :key="route.fullPath" />
               </div>
             </transition>
           </router-view>
@@ -435,6 +435,9 @@ const onCommand = (cmd: string) => {
 <style scoped>
 .layout-container {
   height: 100vh;
+  height: 100dvh;
+  min-height: 100vh;
+  min-height: 100dvh;
   background-color: transparent;
 }
 
@@ -703,6 +706,7 @@ const onCommand = (cmd: string) => {
 .content-wrapper {
   padding: 6px 8px;
   min-height: calc(100vh - 52px);
+  min-height: calc(100dvh - 52px);
   background: #f7f8fb;
 }
 
diff --git a/frontend/src/components/ModulePlaceholder.vue b/frontend/src/components/ModulePlaceholder.vue
index 31d68edb..768a6ee2 100644
--- a/frontend/src/components/ModulePlaceholder.vue
+++ b/frontend/src/components/ModulePlaceholder.vue
@@ -1,19 +1,21 @@
 <template>
-  <div class="module-page">
-    <div class="module-header">
-      <div>
-        <h1 class="module-title">{{ title }}</h1>
-        <p v-if="subtitle" class="module-subtitle">{{ subtitle }}</p>
-      </div>
-      <slot name="actions" />
-    </div>
-    <div class="module-content">
-      <div class="module-list">
-        <div class="module-list-header">
-          <span class="list-title">{{ listTitle }}</span>
-          <span class="list-note">{{ TEXT.common.empty.listPlaceholder }}</span>
+  <div class="module-page ctms-page-shell page--flush">
+    <div class="unified-shell">
+      <div class="module-header unified-action-bar bar--flush">
+        <div>
+          <h1 class="module-title">{{ title }}</h1>
+          <p v-if="subtitle" class="module-subtitle">{{ subtitle }}</p>
+        </div>
+        <slot name="actions" />
+      </div>
+      <div class="module-content unified-section section--flush">
+        <div class="module-list">
+          <div class="module-list-header">
+            <span class="list-title">{{ listTitle }}</span>
+            <span class="list-note">{{ TEXT.common.empty.listPlaceholder }}</span>
+          </div>
+          <StateEmpty :title="emptyTitle" :description="emptyDescription" />
         </div>
-        <StateEmpty :title="emptyTitle" :description="emptyDescription" />
       </div>
     </div>
   </div>
@@ -44,13 +46,7 @@ withDefaults(
 .module-page {
   display: flex;
   flex-direction: column;
-  gap: 16px;
-}
-
-.module-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: baseline;
+  gap: 0;
 }
 
 .module-title {
@@ -68,9 +64,9 @@ withDefaults(
 
 .module-list {
   background-color: #fff;
-  border: 1px solid var(--ctms-border-color);
-  border-radius: var(--ctms-radius);
-  padding: 20px;
+  border: 0;
+  border-radius: 0;
+  padding: 0;
 }
 
 .module-list-header {
diff --git a/frontend/src/components/attachments/AttachmentList.vue b/frontend/src/components/attachments/AttachmentList.vue
index f176a93a..f14cfa25 100644
--- a/frontend/src/components/attachments/AttachmentList.vue
+++ b/frontend/src/components/attachments/AttachmentList.vue
@@ -1,5 +1,5 @@
 <template>
-  <el-card>
+  <div class="attachment-list-panel unified-shell">
     <div class="header">
       <span>{{ headerTitle }}</span>
       <AttachmentUploader
@@ -10,7 +10,7 @@
         @uploaded="load"
       />
     </div>
-    <el-table :data="attachments" v-loading="loading" style="width: 100%">
+    <el-table :data="attachments" v-loading="loading" style="width: 100%" class="attachment-table">
       <el-table-column prop="filename" :label="TEXT.common.labels.filename" min-width="200" />
       <el-table-column :label="TEXT.common.labels.size" width="120">
         <template #default="scope">{{ formatFileSize(scope.row.file_size ?? scope.row.size) }}</template>
@@ -43,7 +43,7 @@
         </template>
       </el-table-column>
     </el-table>
-  </el-card>
+  </div>
 
   <el-dialog append-to=".layout-main .content-wrapper" v-model="previewVisible" :title="previewTitle" width="720px" :close-on-click-modal="false">
     <div v-if="previewError" class="preview-error">
@@ -236,11 +236,23 @@ watch(previewVisible, (visible) => {
 </script>
 
 <style scoped>
+.attachment-list-panel {
+  background: #ffffff;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+}
+
 .header {
   display: flex;
   justify-content: space-between;
   align-items: center;
-  margin-bottom: 8px;
+  padding: 10px 16px;
+  border-bottom: 1px solid #eaf0f8;
+}
+
+.attachment-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .preview-frame {
diff --git a/frontend/src/components/fees/FeeAttachmentPanel.vue b/frontend/src/components/fees/FeeAttachmentPanel.vue
index 91f6e2fd..a86520a7 100644
--- a/frontend/src/components/fees/FeeAttachmentPanel.vue
+++ b/frontend/src/components/fees/FeeAttachmentPanel.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="fee-attachments">
-    <el-card v-for="group in groups" :key="group.key" class="group-card">
+    <div v-for="group in groups" :key="group.key" class="group-card unified-shell">
       <div class="group-header">
         <div>
           <div class="group-title">{{ group.label }}</div>
@@ -28,7 +28,7 @@
         <div v-if="(grouped[group.key] || []).length === 0" class="group-empty">
           <StateEmpty :description="group.emptyText" />
         </div>
-        <el-table v-else :data="grouped[group.key]" style="width: 100%">
+        <el-table v-else :data="grouped[group.key]" style="width: 100%" class="group-table">
           <el-table-column prop="filename" :label="TEXT.common.labels.filename" min-width="160" />
           <el-table-column :label="TEXT.common.labels.size" width="110">
             <template #default="scope">{{ formatFileSize(scope.row.size || scope.row.file_size) }}</template>
@@ -59,7 +59,7 @@
           </el-table-column>
         </el-table>
       </template>
-    </el-card>
+    </div>
   </div>
 
   <el-dialog append-to=".layout-main .content-wrapper" v-model="previewVisible" :title="previewTitle" width="720px" :close-on-click-modal="false">
@@ -315,14 +315,21 @@ watch(previewVisible, (visible) => {
   gap: 12px;
 }
 
-
+.group-card {
+  background: #ffffff;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  overflow: hidden;
+}
 
 .group-header {
   display: flex;
   justify-content: space-between;
   align-items: flex-start;
-  margin-bottom: 8px;
   gap: 8px;
+  padding: 10px 16px;
+  border-bottom: 1px solid #eaf0f8;
 }
 
 .group-title {
@@ -338,7 +345,11 @@ watch(previewVisible, (visible) => {
 }
 
 .group-empty {
-  padding: 0;
+  padding: 12px 16px 0;
+}
+
+.group-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 /* Compact Empty State Override */
diff --git a/frontend/src/styles/main.css b/frontend/src/styles/main.css
index 48999d1b..f354402a 100644
--- a/frontend/src/styles/main.css
+++ b/frontend/src/styles/main.css
@@ -90,6 +90,12 @@
 }
 
 /* 全局重置 */
+html,
+body,
+#app {
+  min-height: 100%;
+}
+
 body {
   margin: 0;
   font-family: "Manrope", "Segoe UI", sans-serif;
@@ -345,15 +351,15 @@ body {
 .ctms-filter-row {
   display: flex;
   align-items: flex-end;
-  gap: 20px;
+  gap: 12px;
   flex-wrap: wrap;
 }
 
 .ctms-filter-item {
   display: flex;
   flex-direction: column;
-  gap: 6px;
-  min-width: 160px;
+  gap: 4px;
+  min-width: 144px;
 }
 
 .ctms-filter-label {
@@ -368,6 +374,14 @@ body {
 
 .ctms-table-card {
   margin-bottom: 0;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none !important;
+  background: transparent;
+}
+
+.ctms-table-card > .el-card__body {
+  padding: 0;
 }
 
 .ctms-table .el-table__row {
@@ -375,7 +389,7 @@ body {
 }
 
 .ctms-pagination {
-  margin-top: 16px;
+  margin-top: 10px;
   display: flex;
   justify-content: flex-end;
 }
diff --git a/frontend/src/styles/unified-page.css b/frontend/src/styles/unified-page.css
index 75789e11..2f4d09e0 100644
--- a/frontend/src/styles/unified-page.css
+++ b/frontend/src/styles/unified-page.css
@@ -3,8 +3,8 @@
   --unified-shell-border: #d8e2ef;
   --unified-shell-divider: #eaf0f8;
   --unified-shell-radius: 16px;
-  --unified-shell-padding-x: 20px;
-  --unified-shell-padding-y: 14px;
+  --unified-shell-padding-x: 16px;
+  --unified-shell-padding-y: 10px;
   --unified-title-color: #0f2345;
   --unified-muted-color: #6f84a8;
 }
@@ -13,6 +13,11 @@
   padding: 16px 20px 20px;
 }
 
+.ctms-page-shell.page--flush,
+.page.page--flush {
+  padding: 0 !important;
+}
+
 .ctms-page-header-row {
   display: flex;
   justify-content: space-between;
@@ -33,6 +38,23 @@
   box-shadow: none;
 }
 
+.page--flush > .unified-shell,
+.page--flush > .main-content-flat.unified-shell,
+.page--flush .page-body > .unified-shell,
+.page--flush .page-body > .main-content-flat.unified-shell {
+  margin: 0;
+  width: 100%;
+  border-radius: 0;
+}
+
+.main-content-flat {
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
 .el-card.unified-shell {
   margin-bottom: 0;
   border: 0 !important;
@@ -54,6 +76,11 @@
   margin-bottom: 0 !important;
 }
 
+.unified-action-bar.bar--flush {
+  padding-left: 0 !important;
+  padding-right: 0 !important;
+}
+
 .ctms-page > .ctms-page-header.unified-action-bar,
 .page > .page-header.unified-action-bar {
   border: 0;
@@ -67,6 +94,23 @@
   border-bottom: 1px solid var(--unified-shell-divider);
 }
 
+.unified-section.section--flush-x {
+  padding-left: 0 !important;
+  padding-right: 0 !important;
+}
+
+.unified-section.section--flush-top {
+  padding-top: 0 !important;
+}
+
+.unified-section.section--flush-bottom {
+  padding-bottom: 0 !important;
+}
+
+.unified-section.section--flush {
+  padding: 0 !important;
+}
+
 .unified-section:last-child {
   border-bottom: 0;
 }
@@ -112,16 +156,16 @@
 }
 
 .unified-shell .el-table th.el-table__cell {
-  background-color: #f8fbff;
-  color: #35527d;
+  background-color: #f7f9fc;
+  color: #34506f;
   font-weight: 600;
-  height: 42px;
+  height: 40px;
   font-size: 13px;
 }
 
 .unified-shell .el-table td.el-table__cell {
   border-bottom-color: #edf2f8;
-  padding: 8px 0;
+  padding: 7px 0;
 }
 
 .unified-shell .el-button,
diff --git a/frontend/src/views/Faq.vue b/frontend/src/views/Faq.vue
index c21bb633..03e56fce 100644
--- a/frontend/src/views/Faq.vue
+++ b/frontend/src/views/Faq.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="page">
+  <div class="page ctms-page-shell page--flush">
     <el-row :gutter="12">
       <el-col :span="5">
         <FaqCategoryPanel
@@ -154,25 +154,25 @@ onMounted(async () => {
 
 <style scoped>
 .page {
-  padding: 16px;
+  padding: 0;
 }
 .faq-main {
   background: #fff;
-  border: 1px solid var(--ctms-border-color);
-  border-radius: 10px;
-  padding: 16px;
+  border: 0;
+  border-radius: 0;
+  padding: 0;
+  overflow: hidden;
 }
 .filters {
   display: flex;
   gap: 8px;
   align-items: center;
-  margin-bottom: 16px;
 }
 .spacer {
   flex: 1;
 }
 .pagination-wrap {
-  margin-top: 14px;
+  padding: 10px 16px 0;
   display: flex;
   justify-content: flex-end;
 }
diff --git a/frontend/src/views/admin/AdminUserApproval.vue b/frontend/src/views/admin/AdminUserApproval.vue
index a7501791..4a55bd72 100644
--- a/frontend/src/views/admin/AdminUserApproval.vue
+++ b/frontend/src/views/admin/AdminUserApproval.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="filter-container unified-action-bar">
         <div class="filter-form">
           <el-tag type="info" effect="plain" class="filter-label-tag">{{ TEXT.common.fields.status }}</el-tag>
@@ -14,7 +14,7 @@
         </div>
       </div>
       <div class="unified-section approval-table-section">
-        <el-table :data="users" v-loading="loading" style="width: 100%">
+        <el-table :data="users" v-loading="loading" class="approval-table" style="width: 100%">
           <el-table-column prop="email" :label="TEXT.common.fields.email" min-width="200" />
           <el-table-column prop="full_name" :label="TEXT.common.fields.name" min-width="140" />
           <el-table-column prop="role" :label="TEXT.common.labels.role" width="120">
@@ -54,7 +54,7 @@
           </el-table-column>
         </el-table>
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -124,12 +124,26 @@ onMounted(() => {
 .page {
   display: flex;
   flex-direction: column;
+  gap: 0;
+}
+
+.main-content-flat {
+  width: 100%;
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
+.main-content-flat :deep(.el-card__body) {
+  padding: 0;
 }
 
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 10px;
   align-items: center;
 }
 
@@ -146,7 +160,10 @@ onMounted(() => {
 }
 
 .approval-table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+  padding: 0;
+}
+
+.approval-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 </style>
diff --git a/frontend/src/views/admin/AuditLogs.vue b/frontend/src/views/admin/AuditLogs.vue
index fd304a74..4b1aa49b 100644
--- a/frontend/src/views/admin/AuditLogs.vue
+++ b/frontend/src/views/admin/AuditLogs.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="audit-toolbar">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item-form">
@@ -60,7 +60,7 @@
         </el-form>
       </div>
       <div class="unified-section table-section">
-        <el-table :data="logs" v-loading="loading" style="width: 100%" stripe>
+        <el-table :data="logs" v-loading="loading" class="audit-table" style="width: 100%" stripe>
           <el-table-column prop="timestamp" :label="TEXT.modules.adminAuditLogs.columns.time" width="180" align="center">
             <template #default="scope">
               <span class="text-gray-500">{{ displayDateTime(scope.row.timestamp) }}</span>
@@ -115,7 +115,7 @@
           />
         </div>
       </div>
-    </el-card>
+    </div>
 
     <el-drawer
       v-model="detailVisible"
@@ -425,21 +425,35 @@ onMounted(async () => {
 .page {
   display: flex;
   flex-direction: column;
+  gap: 0;
+}
+
+.main-content-flat {
+  width: 100%;
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
+.main-content-flat :deep(.el-card__body) {
+  padding: 0;
 }
 
 .table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+  padding: 0;
 }
 
 .audit-toolbar {
-  padding: 12px 16px;
+  padding: 10px 16px;
+  border-bottom: 1px solid var(--unified-shell-divider);
 }
 
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 10px;
+  gap: 8px;
   align-items: center;
   flex-wrap: nowrap;
 }
@@ -451,15 +465,15 @@ onMounted(async () => {
 }
 
 .filter-select-comp {
-  width: 140px;
+  width: 132px;
 }
 
 .filter-select-result {
-  width: 100px;
+  width: 96px;
 }
 
 .date-range-picker-comp {
-  width: 260px !important;
+  width: 248px !important;
 }
 
 .filter-spacer {
@@ -509,9 +523,14 @@ onMounted(async () => {
 }
 
 .pagination-wrap {
-  margin-top: 14px;
+  margin-top: 10px;
   display: flex;
   justify-content: flex-end;
+  padding: 0 0 6px;
+}
+
+.audit-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .drawer-header {
diff --git a/frontend/src/views/admin/ProjectDetail.vue b/frontend/src/views/admin/ProjectDetail.vue
index a9710f58..e9c16f73 100644
--- a/frontend/src/views/admin/ProjectDetail.vue
+++ b/frontend/src/views/admin/ProjectDetail.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="ctms-page setup-page ctms-page-shell">
+  <div class="ctms-page setup-page ctms-page-shell page--flush">
     <div class="setup-shell unified-shell">
       <div class="setup-header unified-action-bar">
       <div class="setup-flow">
@@ -537,7 +537,7 @@
       <StateLoading v-else :rows="4" />
       </section>
 
-    <section v-show="activeStep === 1" class="setup-section">
+    <section v-show="activeStep === 1" class="setup-section setup-section--table">
       <el-table :data="currentSetupDraft.projectMilestones" class="ctms-table setup-milestone-table">
         <el-table-column label="里程碑" min-width="180">
           <template #default="scope">
@@ -668,7 +668,7 @@
       </el-table>
       </section>
 
-    <section v-show="activeStep === 2" class="setup-section enrollment-plan-section">
+    <section v-show="activeStep === 2" class="setup-section setup-section--table enrollment-plan-section">
       <div class="enrollment-plan-toolbar">
         <div class="enrollment-inline-group">
           <span class="enrollment-inline-label required">计划入组日期</span>
@@ -886,7 +886,7 @@
       </el-table>
       </section>
 
-    <section v-show="activeStep === 3" class="setup-section">
+    <section v-show="activeStep === 3" class="setup-section setup-section--table">
       <el-table :data="currentSetupDraft.siteMilestones" class="ctms-table">
         <el-table-column label="里程碑" min-width="220">
           <template #default="scope">
@@ -979,7 +979,7 @@
       </el-table>
       </section>
 
-    <section v-show="activeStep === 4" class="setup-section enrollment-plan-section">
+    <section v-show="activeStep === 4" class="setup-section setup-section--table enrollment-plan-section">
       <div class="enrollment-plan-toolbar">
         <div class="site-plan-selector">
           <span class="enrollment-inline-label">中心</span>
@@ -1226,7 +1226,7 @@
       </div>
     </section>
 
-    <section v-show="activeStep === 5" class="setup-section">
+    <section v-show="activeStep === 5" class="setup-section setup-section--table">
       <el-table :data="currentSetupDraft.monitoringStrategies" class="ctms-table">
         <el-table-column label="监查类型" min-width="180">
           <template #default="scope">
@@ -1303,7 +1303,7 @@
       </el-table>
       </section>
 
-    <section v-show="activeStep === 6" class="setup-section">
+    <section v-show="activeStep === 6" class="setup-section setup-section--table">
       <el-table :data="centerConfirmDisplayRows" class="ctms-table">
         <el-table-column label="中心" min-width="180">
           <template #default="scope">
@@ -6045,11 +6045,10 @@ onBeforeUnmount(() => {
 }
 
 .setup-shell {
-  border: 1px solid #d8e2ef;
-  border-radius: 16px;
+  border: 0;
   background: #ffffff;
   overflow: hidden;
-  box-shadow: 0 6px 20px rgba(17, 42, 88, 0.05);
+  box-shadow: none;
 }
 
 .setup-header {
@@ -6977,6 +6976,12 @@ onBeforeUnmount(() => {
   background: #ffffff;
 }
 
+.setup-section--table {
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+}
+
 .enrollment-plan-section {
   display: flex;
   flex-direction: column;
@@ -7207,13 +7212,16 @@ onBeforeUnmount(() => {
 
 .setup-content {
   position: relative;
+  padding-left: 0 !important;
+  padding-right: 0 !important;
+  padding-bottom: 0 !important;
 }
 
 .setup-content-step-title {
   display: flex;
   align-items: center;
   gap: 10px;
-  padding: 10px 12px;
+  padding: 9px 12px;
   font-size: 18px;
   font-weight: 700;
   color: #162f57;
@@ -7473,6 +7481,12 @@ onBeforeUnmount(() => {
   margin-bottom: 10px;
 }
 
+.setup-section--table .setup-section-header {
+  margin-bottom: 0;
+  padding-left: 12px;
+  padding-right: 12px;
+}
+
 .setup-content.setup-content-drawer .setup-section-header {
   padding-bottom: 0;
   margin-bottom: 0;
@@ -7698,9 +7712,10 @@ onBeforeUnmount(() => {
 }
 
 .setup-section :deep(.el-table th.el-table__cell) {
-  background: #f8fafc !important;
-  color: #64748b !important;
-  font-weight: 500 !important;
+  background: #f7f9fc !important;
+  color: #34506f !important;
+  font-weight: 600 !important;
+  height: 40px;
   border-bottom: 1px solid #e2e8f0 !important;
   border-right: none !important;
   border-left: none !important;
@@ -7711,6 +7726,8 @@ onBeforeUnmount(() => {
   border-right: none !important;
   border-left: none !important;
   background: transparent !important;
+  padding-top: 7px;
+  padding-bottom: 7px;
 }
 
 /* 覆盖悬停状态颜色，保持极简高级 */
diff --git a/frontend/src/views/admin/ProjectMembers.vue b/frontend/src/views/admin/ProjectMembers.vue
index 5dc424a3..03d15ccc 100644
--- a/frontend/src/views/admin/ProjectMembers.vue
+++ b/frontend/src/views/admin/ProjectMembers.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="unified-action-bar actions-only-bar">
         <div class="filter-spacer"></div>
         <el-button type="primary" @click="openAdd">
@@ -8,7 +8,7 @@
         </el-button>
       </div>
       <div class="unified-section member-table-section">
-        <el-table :data="memberRows" v-loading="loading" stripe>
+        <el-table :data="memberRows" v-loading="loading" stripe class="member-table">
           <el-table-column prop="full_name" :label="TEXT.modules.adminProjectMembers.username" min-width="160" />
           <el-table-column prop="role_in_study" :label="TEXT.modules.adminProjectMembers.projectRole" min-width="140">
             <template #default="scope">
@@ -62,7 +62,7 @@
           </el-table-column>
         </el-table>
       </div>
-    </el-card>
+    </div>
 
     <el-dialog append-to=".layout-main .content-wrapper" :title="TEXT.modules.adminProjectMembers.newTitle" width="520px" v-model="addVisible" :close-on-click-modal="false">
       <el-form :model="newMember" label-width="120px" ref="addFormRef" :rules="addRules">
@@ -301,6 +301,20 @@ onMounted(async () => {
 .page {
   display: flex;
   flex-direction: column;
+  gap: 0;
+}
+
+.main-content-flat {
+  width: 100%;
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
+.main-content-flat :deep(.el-card__body) {
+  padding: 0;
 }
 
 .actions-only-bar {
@@ -310,8 +324,11 @@ onMounted(async () => {
 }
 
 .member-table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+  padding: 0;
+}
+
+.member-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .hint {
diff --git a/frontend/src/views/admin/Projects.vue b/frontend/src/views/admin/Projects.vue
index 1ac680c7..84960d04 100644
--- a/frontend/src/views/admin/Projects.vue
+++ b/frontend/src/views/admin/Projects.vue
@@ -1,14 +1,14 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="unified-action-bar actions-only-bar">
         <div class="filter-spacer"></div>
         <el-button type="primary" @click="openCreate">
           {{ TEXT.common.actions.add }}{{ TEXT.modules.adminProjects.projectLabel }}
         </el-button>
       </div>
-      <div class="unified-section">
-        <el-table :data="projects" v-loading="loading" stripe>
+      <div class="unified-section project-table-section">
+        <el-table :data="projects" v-loading="loading" stripe class="project-table">
           <el-table-column prop="name" :label="TEXT.common.fields.projectName" min-width="300">
             <template #default="scope">
               <el-link type="primary" @click="goDetail(scope.row)" class="font-medium">{{ scope.row.name }}</el-link>
@@ -57,7 +57,7 @@
           </el-table-column>
         </el-table>
       </div>
-    </el-card>
+    </div>
     <ProjectForm v-model:visible="formVisible" :project="editingProject" @saved="loadProjects" />
   </div>
 </template>
@@ -219,6 +219,20 @@ onMounted(() => {
 .page {
   display: flex;
   flex-direction: column;
+  gap: 0;
+}
+
+.main-content-flat {
+  width: 100%;
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
+.main-content-flat :deep(.el-card__body) {
+  padding: 0;
 }
 
 .actions-only-bar {
@@ -227,9 +241,12 @@ onMounted(() => {
   align-items: center;
 }
 
-.unified-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+.project-table-section {
+  padding: 0;
+}
+
+.project-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .action-btn {
diff --git a/frontend/src/views/admin/Sites.vue b/frontend/src/views/admin/Sites.vue
index 79694371..95db8604 100644
--- a/frontend/src/views/admin/Sites.vue
+++ b/frontend/src/views/admin/Sites.vue
@@ -1,14 +1,14 @@
 <template>
-  <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+  <div class="page page--flush">
+    <div class="main-content-flat unified-shell">
       <div class="unified-action-bar actions-only-bar">
         <div class="filter-spacer"></div>
         <el-button type="primary" @click="openCreate">
           {{ TEXT.common.actions.add }}{{ TEXT.modules.adminSites.siteLabel }}
         </el-button>
       </div>
-      <div class="unified-section site-table-section">
-        <el-table :data="displaySites" v-loading="loading" stripe :row-class-name="siteRowClass" style="width: 100%">
+      <div class="unified-section site-table-section section--flush-x section--flush-top section--flush-bottom">
+        <el-table :data="displaySites" v-loading="loading" stripe :row-class-name="siteRowClass" style="width: 100%" class="site-table">
           <el-table-column prop="name" :label="TEXT.common.fields.siteName" min-width="220">
             <template #default="scope">
               <div class="site-name-cell">
@@ -61,7 +61,7 @@
           </el-table-column>
         </el-table>
       </div>
-    </el-card>
+    </div>
     <SiteForm
       v-if="projectId"
       v-model:visible="formVisible"
@@ -278,9 +278,8 @@ onMounted(async () => {
   align-items: center;
 }
 
-.site-table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+.site-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .site-name-cell {
diff --git a/frontend/src/views/admin/Users.vue b/frontend/src/views/admin/Users.vue
index 817ea9c4..81179345 100644
--- a/frontend/src/views/admin/Users.vue
+++ b/frontend/src/views/admin/Users.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="filter-container unified-action-bar">
         <div class="filter-form">
           <el-form-item label="" class="filter-item-form">
@@ -28,7 +28,7 @@
       </div>
 
       <div class="unified-section user-table-section">
-        <el-table :data="users" stripe v-loading="loading" style="width: 100%">
+        <el-table :data="users" stripe v-loading="loading" class="user-table" style="width: 100%">
           <el-table-column prop="email" :label="TEXT.common.fields.email" min-width="200" />
           <el-table-column prop="full_name" :label="TEXT.common.fields.name" min-width="140" />
           <el-table-column prop="department" :label="TEXT.common.fields.department" min-width="140" />
@@ -84,7 +84,7 @@
           />
         </div>
       </div>
-    </el-card>
+    </div>
     <UserForm v-model:visible="formVisible" :user="editingUser" :admin-count="activeAdminCount" @saved="loadUsers" />
     <UserResetPassword v-model:visible="resetVisible" :user="resetUser" @reset="loadUsers" />
   </div>
@@ -291,12 +291,26 @@ onMounted(() => {
 .page {
   display: flex;
   flex-direction: column;
+  gap: 0;
+}
+
+.main-content-flat {
+  width: 100%;
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
+.main-content-flat :deep(.el-card__body) {
+  padding: 0;
 }
 
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 10px;
   align-items: center;
 }
 
@@ -306,7 +320,7 @@ onMounted(() => {
 }
 
 .filter-input-comp {
-  width: 200px;
+  width: 190px;
 }
 
 .filter-spacer {
@@ -314,13 +328,31 @@ onMounted(() => {
 }
 
 .user-table-section {
+  padding: 0;
+}
+
+.user-table {
+  margin-top: 0;
+}
+
+.user-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
+.user-table :deep(th.el-table__cell) {
+  padding-top: 10px;
+  padding-bottom: 10px;
+}
+
+.user-table :deep(td.el-table__cell) {
   padding-top: 12px;
   padding-bottom: 12px;
 }
 
 .pagination-wrap {
-  margin-top: 14px;
+  margin-top: 10px;
   display: flex;
   justify-content: flex-end;
+  padding: 0 0 6px;
 }
 </style>
diff --git a/frontend/src/views/documents/DocumentDetail.vue b/frontend/src/views/documents/DocumentDetail.vue
index 7d7997fa..d4b340fa 100644
--- a/frontend/src/views/documents/DocumentDetail.vue
+++ b/frontend/src/views/documents/DocumentDetail.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page">
+  <div class="page ctms-page-shell page--flush">
     <div class="unified-shell">
-      <section class="unified-section" v-loading="loading">
+      <section class="unified-section section--flush-x" v-loading="loading">
         <div class="unified-section-header">
           <div>
             <div class="ctms-section-title">
@@ -37,7 +37,7 @@
         </el-descriptions>
       </section>
 
-      <section class="unified-section">
+      <section class="unified-section section--flush-x section--flush-bottom">
         <el-tabs v-model="activeTab" @tab-change="handleTabChange" class="ctms-tabs">
       <el-tab-pane :label="TEXT.modules.fileVersionManagement.tabs.versions" name="versions">
         <div class="ctms-section-header">
@@ -49,7 +49,7 @@
             </el-button>
           </div>
         </div>
-        <el-card class="ctms-table-card unified-shell">
+        <div class="ctms-table-panel">
           <el-table :data="detail.version_timeline" v-loading="versionLoading" class="ctms-table">
             <el-table-column prop="version_no" :label="TEXT.modules.fileVersionManagement.fields.versionNo" width="120">
                <template #default="{ row }">
@@ -94,7 +94,7 @@
               </template>
             </el-table-column>
           </el-table>
-        </el-card>
+        </div>
       </el-tab-pane>
 
       <el-tab-pane :label="TEXT.modules.fileVersionManagement.tabs.distributions" name="distributions">
@@ -107,7 +107,7 @@
             </el-button>
           </div>
         </div>
-        <el-card class="ctms-table-card unified-shell">
+        <div class="ctms-table-panel">
           <el-table :data="distributions" v-loading="distributionLoading" class="ctms-table">
             <el-table-column :label="TEXT.modules.fileVersionManagement.fields.targetType" width="120">
               <template #default="{ row }">
@@ -125,7 +125,7 @@
               </template>
             </el-table-column>
           </el-table>
-        </el-card>
+        </div>
       </el-tab-pane>
 
         </el-tabs>
@@ -680,6 +680,18 @@ watch(
   gap: 0;
 }
 
+.ctms-table-panel {
+  padding: 0;
+}
+
+.ctms-section-header {
+  margin-bottom: 0;
+}
+
+.ctms-table-panel :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
 .doc-meta-row {
   display: flex;
   align-items: center;
diff --git a/frontend/src/views/documents/DocumentList.vue b/frontend/src/views/documents/DocumentList.vue
index 1adde00f..0861b70d 100644
--- a/frontend/src/views/documents/DocumentList.vue
+++ b/frontend/src/views/documents/DocumentList.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
-      <div class="filter-container unified-action-bar">
+  <div class="page ctms-page-shell page--flush">
+    <div class="main-content-flat unified-shell">
+      <div class="filter-container unified-action-bar bar--flush">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item-form">
             <el-select v-model="filters.scope_type" :placeholder="TEXT.modules.fileVersionManagement.filters.scope" clearable class="filter-select-comp">
@@ -28,7 +28,7 @@
           </el-button>
         </el-form>
       </div>
-      <section class="unified-section">
+      <section class="unified-section document-table-section section--flush-x section--flush-top section--flush-bottom">
         <el-table
           :data="sortedItems"
           v-loading="loading"
@@ -84,7 +84,7 @@
           </template>
         </el-table>
       </section>
-    </el-card>
+    </div>
 
     <el-dialog append-to=".layout-main .content-wrapper" v-model="createVisible" :title="TEXT.modules.fileVersionManagement.dialog.createTitle" width="520px" destroy-on-close class="ctms-dialog">
       <el-form ref="createFormRef" :model="createForm" :rules="createRules" label-width="100px" class="ctms-form">
@@ -346,18 +346,10 @@ watch(
   gap: 0;
 }
 
-.main-content-card :deep(.el-card__body) {
-  padding: 0;
-}
-
-.filter-container {
-  margin-bottom: 0;
-}
-
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -370,6 +362,10 @@ watch(
   width: 132px;
 }
 
+.ctms-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
 .filter-spacer {
   flex: 1;
 }
diff --git a/frontend/src/views/drug/ShipmentDetail.vue b/frontend/src/views/drug/ShipmentDetail.vue
index 6b302270..38e82eb6 100644
--- a/frontend/src/views/drug/ShipmentDetail.vue
+++ b/frontend/src/views/drug/ShipmentDetail.vue
@@ -36,7 +36,7 @@
           <el-descriptions-item :label="TEXT.common.fields.remark" :span="2">{{ detail.remark || TEXT.common.fallback }}</el-descriptions-item>
         </el-descriptions>
       </section>
-      <section class="unified-section">
+      <section class="unified-section attachment-section">
         <AttachmentList
           v-if="shipmentId"
           :study-id="studyId"
@@ -109,6 +109,10 @@ onMounted(load);
   gap: 0;
 }
 
+.attachment-section {
+  padding: 0;
+}
+
 .section-title-row {
   display: flex;
   justify-content: space-between;
diff --git a/frontend/src/views/fees/ContractFeeDetail.vue b/frontend/src/views/fees/ContractFeeDetail.vue
index 95a7a35f..6b721e82 100644
--- a/frontend/src/views/fees/ContractFeeDetail.vue
+++ b/frontend/src/views/fees/ContractFeeDetail.vue
@@ -251,6 +251,10 @@ onMounted(async () => {
   overflow: hidden;
 }
 
+.section-card :deep(.el-card__body) {
+  padding: 0;
+}
+
 .card-header {
   padding: 4px 0;
 }
diff --git a/frontend/src/views/fees/ContractFeeForm.vue b/frontend/src/views/fees/ContractFeeForm.vue
index 5bd9d9bb..1128c670 100644
--- a/frontend/src/views/fees/ContractFeeForm.vue
+++ b/frontend/src/views/fees/ContractFeeForm.vue
@@ -88,7 +88,7 @@
           </el-row>
         </el-card>
 
-        <el-card class="form-card section-margin unified-shell" shadow="never">
+        <el-card class="form-card section-margin attachment-card unified-shell" shadow="never">
           <template #header>
             <div class="card-header actions-header">
               <span class="header-title">{{ TEXT.modules.feeContracts.paymentTitle }}</span>
@@ -517,6 +517,10 @@ onMounted(async () => {
   margin-top: 24px;
 }
 
+.attachment-card :deep(.el-card__body) {
+  padding: 0;
+}
+
 .card-header {
   padding: 4px 0;
 }
diff --git a/frontend/src/views/fees/ContractFees.vue b/frontend/src/views/fees/ContractFees.vue
index 0d9fa9fe..1e404525 100644
--- a/frontend/src/views/fees/ContractFees.vue
+++ b/frontend/src/views/fees/ContractFees.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="page ctms-page-shell">
+  <div class="page ctms-page-shell page--flush">
     <div class="overview">
       <el-row :gutter="20">
         <el-col :xs="24" :sm="12" :md="6">
@@ -53,7 +53,7 @@
 
     <StateLoading v-else-if="loading" :rows="6" />
 
-    <el-card shadow="never" class="main-content-card unified-shell" v-else>
+    <div class="main-content-flat unified-shell" v-else>
       <div class="filter-container unified-action-bar">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item">
@@ -86,13 +86,13 @@
           </el-button>
         </el-form>
       </div>
-      <section class="unified-section">
+      <section class="unified-section contract-table-section section--flush-x section--flush-top section--flush-bottom">
         <el-table
           :data="sortedContracts"
           style="width: 100%"
           @row-click="onRowClick"
           :row-class-name="contractRowClass"
-          :header-cell-style="{ background: '#f8f9fb' }"
+          class="contract-table"
         >
           <el-table-column prop="center_name" :label="TEXT.common.fields.site" min-width="160">
             <template #default="scope">
@@ -167,7 +167,7 @@
         </el-table>
         <StateEmpty v-if="sortedContracts.length === 0" :description="TEXT.modules.feeContracts.empty" />
       </section>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -350,18 +350,14 @@ onMounted(async () => {
   gap: 0;
 }
 
-.main-content-card :deep(.el-card__body) {
-  padding: 0;
-}
-
-.filter-container {
-  margin-bottom: 0;
+.overview {
+  margin: 0;
 }
 
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -383,10 +379,8 @@ onMounted(async () => {
   flex: 1;
 }
 
-.table-card {
-  border-radius: 12px;
-  border: 1px solid var(--ctms-border-color);
-  overflow: hidden;
+.contract-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .site-cell {
diff --git a/frontend/src/views/fees/SpecialExpenseDetail.vue b/frontend/src/views/fees/SpecialExpenseDetail.vue
index 14724912..7776b26c 100644
--- a/frontend/src/views/fees/SpecialExpenseDetail.vue
+++ b/frontend/src/views/fees/SpecialExpenseDetail.vue
@@ -233,6 +233,10 @@ onMounted(async () => {
   overflow: hidden;
 }
 
+.section-card :deep(.el-card__body) {
+  padding: 0;
+}
+
 .card-header {
   display: flex;
   justify-content: space-between;
diff --git a/frontend/src/views/fees/SpecialExpenseForm.vue b/frontend/src/views/fees/SpecialExpenseForm.vue
index 80fb5769..25eff502 100644
--- a/frontend/src/views/fees/SpecialExpenseForm.vue
+++ b/frontend/src/views/fees/SpecialExpenseForm.vue
@@ -56,7 +56,7 @@
           </el-row>
         </el-card>
 
-        <el-card class="form-card section-margin unified-shell" shadow="never">
+        <el-card class="form-card section-margin attachment-card unified-shell" shadow="never">
           <template #header>
             <div class="card-header">
               <span class="header-title">{{ TEXT.common.fields.status }}</span>
@@ -394,6 +394,10 @@ onMounted(async () => {
   margin-top: 24px;
 }
 
+.attachment-card :deep(.el-card__body) {
+  padding: 0;
+}
+
 .card-header {
   padding: 4px 0;
 }
diff --git a/frontend/src/views/fees/SpecialExpenses.vue b/frontend/src/views/fees/SpecialExpenses.vue
index 1de78b80..871453c6 100644
--- a/frontend/src/views/fees/SpecialExpenses.vue
+++ b/frontend/src/views/fees/SpecialExpenses.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="page ctms-page-shell">
+  <div class="page ctms-page-shell page--flush">
     <div class="overview">
       <el-row :gutter="20">
         <el-col :xs="24" :sm="12" :md="6">
@@ -52,7 +52,7 @@
 
     <StateLoading v-else-if="loading" :rows="6" />
 
-    <el-card shadow="never" class="main-content-card unified-shell" v-else>
+    <div class="main-content-flat unified-shell" v-else>
       <div class="filter-container unified-action-bar">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item">
@@ -97,13 +97,13 @@
           </el-button>
         </el-form>
       </div>
-      <section class="unified-section">
+      <section class="unified-section special-expense-table-section section--flush-x section--flush-top section--flush-bottom">
         <el-table
           :data="sortedExpenses"
           style="width: 100%"
           @row-click="onRowClick"
-          :header-cell-style="{ background: '#f8f9fb' }"
           :row-class-name="expenseRowClass"
+          class="special-expense-table"
         >
           <el-table-column :label="TEXT.common.fields.occurDate" width="140">
             <template #default="scope">
@@ -166,7 +166,7 @@
         </el-table>
         <StateEmpty v-if="sortedExpenses.length === 0" :description="TEXT.modules.feeSpecials.empty" />
       </section>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -355,18 +355,14 @@ onMounted(async () => {
   gap: 0;
 }
 
-.main-content-card :deep(.el-card__body) {
-  padding: 0;
-}
-
-.filter-container {
-  margin-bottom: 0;
+.overview {
+  margin: 0;
 }
 
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -391,10 +387,8 @@ onMounted(async () => {
   flex: 1;
 }
 
-.table-card {
-  border-radius: 12px;
-  border: 1px solid var(--ctms-border-color);
-  overflow: hidden;
+.special-expense-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .date-text {
diff --git a/frontend/src/views/finance/ContractDetail.vue b/frontend/src/views/finance/ContractDetail.vue
index 4e765edb..e0644c17 100644
--- a/frontend/src/views/finance/ContractDetail.vue
+++ b/frontend/src/views/finance/ContractDetail.vue
@@ -19,7 +19,7 @@
           <el-descriptions-item :label="TEXT.common.fields.remark" :span="2">{{ detail.remark || TEXT.common.fallback }}</el-descriptions-item>
         </el-descriptions>
       </section>
-      <section class="unified-section">
+      <section class="unified-section attachment-section">
         <AttachmentList
           v-if="contractId"
           :study-id="studyId"
@@ -113,4 +113,8 @@ onMounted(async () => {
   flex-direction: column;
   gap: 0;
 }
+
+.attachment-section {
+  padding: 0;
+}
 </style>
diff --git a/frontend/src/views/finance/SpecialDetail.vue b/frontend/src/views/finance/SpecialDetail.vue
index 0ec5c02b..bfa6d5c3 100644
--- a/frontend/src/views/finance/SpecialDetail.vue
+++ b/frontend/src/views/finance/SpecialDetail.vue
@@ -18,7 +18,7 @@
           <el-descriptions-item :label="TEXT.common.fields.remark" :span="2">{{ detail.remark || TEXT.common.fallback }}</el-descriptions-item>
         </el-descriptions>
       </section>
-      <section class="unified-section">
+      <section class="unified-section attachment-section">
         <AttachmentList
           v-if="specialId"
           :study-id="studyId"
@@ -112,4 +112,8 @@ onMounted(async () => {
   flex-direction: column;
   gap: 0;
 }
+
+.attachment-section {
+  padding: 0;
+}
 </style>
diff --git a/frontend/src/views/ia/DrugShipments.vue b/frontend/src/views/ia/DrugShipments.vue
index 066fea48..41fe76cf 100644
--- a/frontend/src/views/ia/DrugShipments.vue
+++ b/frontend/src/views/ia/DrugShipments.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page">
+  <div class="page page--flush">
 
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="filter-container unified-action-bar">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item">
@@ -48,11 +48,12 @@
           </el-button>
         </el-form>
       </div>
-      <div class="unified-section table-section">
+      <div class="unified-section table-section section--flush-x section--flush-top section--flush-bottom">
         <el-table
           :data="sortedItems"
           v-loading="loading"
           style="width: 100%"
+          class="shipment-table"
           :row-class-name="shipmentRowClass"
           @row-click="onRowClick"
         >
@@ -104,7 +105,7 @@
         </el-table>
         <StateEmpty v-if="!loading && sortedItems.length === 0" :description="TEXT.modules.drugShipments.empty" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -252,7 +253,7 @@ onMounted(async () => {
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -271,10 +272,10 @@ onMounted(async () => {
 }
 
 .filter-actions :deep(.el-button) {
-  height: 36px;
-  line-height: 36px;
-  padding: 0 18px;
-  border-radius: 8px;
+  height: 32px;
+  line-height: 32px;
+  padding: 0 12px;
+  border-radius: 10px;
 }
 
 .filter-select {
@@ -285,9 +286,8 @@ onMounted(async () => {
   flex: 1;
 }
 
-.table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+.shipment-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .type-tag {
diff --git a/frontend/src/views/ia/FileVersionManagement.vue b/frontend/src/views/ia/FileVersionManagement.vue
index 88a4c811..1517919d 100644
--- a/frontend/src/views/ia/FileVersionManagement.vue
+++ b/frontend/src/views/ia/FileVersionManagement.vue
@@ -1,10 +1,10 @@
 <template>
-  <div class="redirecting ctms-page-shell">
-    <section class="unified-action-bar">
+  <div class="redirecting ctms-page-shell page--flush">
+    <section class="unified-action-bar bar--flush">
       <div class="redirecting-title">{{ TEXT.menu.fileVersionManagement }}</div>
     </section>
     <section class="unified-shell">
-      <section class="unified-section">
+      <section class="unified-section section--flush">
         <el-empty :description="`${TEXT.common.loading}...`" />
       </section>
     </section>
diff --git a/frontend/src/views/ia/FinanceContracts.vue b/frontend/src/views/ia/FinanceContracts.vue
index ee2ed035..858af569 100644
--- a/frontend/src/views/ia/FinanceContracts.vue
+++ b/frontend/src/views/ia/FinanceContracts.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="filter-container unified-action-bar">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item-form">
@@ -70,7 +70,7 @@
         </el-table>
         <StateEmpty v-if="!loading && sortedItems.length === 0" :description="TEXT.modules.financeContracts.empty" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -185,10 +185,18 @@ onMounted(async () => {
   flex-direction: column;
 }
 
+.main-content-flat {
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -206,8 +214,12 @@ onMounted(async () => {
 }
 
 .table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+  padding-top: 0;
+  padding-bottom: 0;
+}
+
+.ctms-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 
diff --git a/frontend/src/views/ia/FinanceSpecial.vue b/frontend/src/views/ia/FinanceSpecial.vue
index af29fc52..103b8e71 100644
--- a/frontend/src/views/ia/FinanceSpecial.vue
+++ b/frontend/src/views/ia/FinanceSpecial.vue
@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="filter-container unified-action-bar">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item-form">
@@ -80,7 +80,7 @@
         </el-table>
         <StateEmpty v-if="!loading && sortedItems.length === 0" :description="TEXT.modules.financeSpecials.empty" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -194,10 +194,18 @@ onMounted(async () => {
   flex-direction: column;
 }
 
+.main-content-flat {
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -219,8 +227,12 @@ onMounted(async () => {
 }
 
 .table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+  padding-top: 0;
+  padding-bottom: 0;
+}
+
+:deep(.ctms-table .el-table__inner-wrapper::before) {
+  display: none;
 }
 
 </style>
diff --git a/frontend/src/views/ia/KnowledgeNotes.vue b/frontend/src/views/ia/KnowledgeNotes.vue
index 264febd4..711550aa 100644
--- a/frontend/src/views/ia/KnowledgeNotes.vue
+++ b/frontend/src/views/ia/KnowledgeNotes.vue
@@ -1,8 +1,8 @@
 <template>
-  <div class="page">
+  <div class="page ctms-page-shell page--flush">
 
-    <el-card shadow="never" class="main-content-card unified-shell">
-      <div class="filter-container unified-action-bar">
+    <div class="main-content-flat unified-shell">
+      <div class="filter-container unified-action-bar bar--flush">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item-form">
             <el-input 
@@ -29,7 +29,7 @@
           </el-button>
         </el-form>
       </div>
-      <div class="unified-section table-section">
+      <div class="unified-section table-section section--flush-x section--flush-top section--flush-bottom">
         <el-table
           :data="sortedItems"
           v-loading="loading"
@@ -60,7 +60,7 @@
         </el-table>
         <StateEmpty v-if="!loading && sortedItems.length === 0" :description="TEXT.modules.knowledgeNotes.empty" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -178,7 +178,7 @@ onMounted(async () => {
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -195,9 +195,8 @@ onMounted(async () => {
   flex: 1;
 }
 
-.table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+:deep(.ctms-table .el-table__inner-wrapper::before) {
+  display: none;
 }
 
 </style>
diff --git a/frontend/src/views/ia/MaterialEquipment.vue b/frontend/src/views/ia/MaterialEquipment.vue
index 3006fac4..fd5fd5f8 100644
--- a/frontend/src/views/ia/MaterialEquipment.vue
+++ b/frontend/src/views/ia/MaterialEquipment.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page">
+  <div class="page page--flush">
     <div v-if="study.currentStudy" class="unified-shell">
-      <section class="unified-section equipment-section">
+      <section class="unified-section section--flush">
         <div class="filter-row">
           <el-form :inline="true" :model="filters">
             <el-form-item label="设备名称">
@@ -15,7 +15,7 @@
           <el-button type="primary" @click="openCreate">新建</el-button>
         </div>
 
-        <el-table v-loading="loading" :data="rows" class="ctms-table" style="width: 100%" table-layout="fixed">
+        <el-table v-loading="loading" :data="rows" class="ctms-table equipment-table" style="width: 100%" table-layout="fixed">
           <el-table-column prop="name" label="设备名称" />
           <el-table-column prop="specModel" label="规格型号" />
           <el-table-column prop="unit" label="单位" />
@@ -391,11 +391,6 @@ watch(
   flex-direction: column;
 }
 
-.equipment-section {
-  padding-top: 14px;
-  padding-bottom: 12px;
-}
-
 .filter-row {
   display: flex;
   align-items: center;
@@ -593,9 +588,13 @@ watch(
   padding-bottom: 4px;
 }
 
+.equipment-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
 /* ========== 表格居中 ========== */
-:deep(.ctms-table th.el-table__cell .cell),
-:deep(.ctms-table td.el-table__cell .cell) {
+.equipment-table :deep(th.el-table__cell .cell),
+.equipment-table :deep(td.el-table__cell .cell) {
   text-align: center;
 }
 </style>
diff --git a/frontend/src/views/ia/ProjectMilestones.vue b/frontend/src/views/ia/ProjectMilestones.vue
index 9837e4d2..5aed53b2 100644
--- a/frontend/src/views/ia/ProjectMilestones.vue
+++ b/frontend/src/views/ia/ProjectMilestones.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page ctms-page-shell">
+  <div class="page ctms-page-shell page--flush">
     <div v-if="study.currentStudy" class="unified-shell ctms-table-card">
-      <section class="unified-action-bar">
+      <section class="unified-action-bar bar--flush">
         <div class="card-header ctms-page-header-row">
           <div>
             <div class="card-title">{{ TEXT.modules.projectMilestones.listTitle }}</div>
@@ -22,7 +22,7 @@
           </div>
         </div>
       </section>
-      <section class="unified-section ctms-page-content-grid">
+      <section class="unified-section ctms-page-content-grid section--flush-x section--flush-top section--flush-bottom">
         <el-table :data="rows" v-loading="loading" class="ctms-table" style="width: 100%">
           <el-table-column prop="name" :label="TEXT.modules.projectMilestones.columns.name" min-width="140" />
           <el-table-column prop="planDate" :label="TEXT.modules.projectMilestones.columns.planDate" min-width="170">
@@ -450,12 +450,16 @@ watch(
   flex-direction: column;
 }
 
+.ctms-page-content-grid {
+  gap: 0;
+}
+
 .card-header {
   display: flex;
   align-items: center;
   justify-content: space-between;
   gap: 12px;
-  margin-bottom: 12px;
+  margin-bottom: 0;
   flex-wrap: wrap;
 }
 
@@ -657,12 +661,7 @@ watch(
   background: #94a3b8;
 }
 
-:deep(.ctms-table th.el-table__cell .cell),
-:deep(.ctms-table td.el-table__cell .cell) {
-  font-size: 11px;
-  padding-top: 4px;
-  padding-bottom: 4px;
-  padding-left: 6px;
-  padding-right: 6px;
+.ctms-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 </style>
diff --git a/frontend/src/views/ia/ProjectOverview.vue b/frontend/src/views/ia/ProjectOverview.vue
index 4d917cf4..40006c31 100644
--- a/frontend/src/views/ia/ProjectOverview.vue
+++ b/frontend/src/views/ia/ProjectOverview.vue
@@ -1,21 +1,7 @@
 <template>
-  <div class="page ctms-page-shell">
+  <div class="page ctms-page-shell page--flush">
     <div v-if="study.currentStudy" class="page-body">
       <div class="unified-shell ctms-table-card">
-        <section class="unified-section">
-          <div class="kpi-grid">
-            <KpiCard
-              v-for="item in kpiItems"
-              :key="item.key"
-              class="kpi"
-              :title="item.title"
-              :value="item.value"
-              :subtext="item.subtext"
-              :type="item.type"
-            />
-          </div>
-        </section>
-
         <section class="unified-section">
           <div class="overview-meta-inline">
             <el-tag v-if="usingDemo" effect="plain" type="info" class="demo-tag">示例数据</el-tag>
@@ -83,7 +69,6 @@ import { fetchProjectOverview } from "../../api/overview";
 import { fetchSites } from "../../api/sites";
 import StateEmpty from "../../components/StateEmpty.vue";
 import StateLoading from "../../components/StateLoading.vue";
-import KpiCard from "../../components/KpiCard.vue";
 import CenterProgressRow from "./project-overview/CenterProgressRow.vue";
 import EnrollmentBarChart, { type EnrollmentBarItem } from "./project-overview/EnrollmentBarChart.vue";
 import { adaptProjectOverview, type CenterOverview, type ProjectOverviewViewModel } from "./project-overview/overview.adapter";
@@ -99,35 +84,6 @@ const updatedAtLabel = ref(displayDateTime(new Date()));
 const preferApi = String(import.meta.env.VITE_USE_OVERVIEW_API || "").toLowerCase() === "true";
 
 const centers = computed(() => overview.value?.centers || []);
-const kpiItems = computed(() => {
-  const summary = overview.value?.summary;
-  const totalTarget = summary?.total_target ?? 0;
-  const totalActual = summary?.total_actual ?? 0;
-  const activeCenters = centers.value.filter((item) => item.is_active !== false).length;
-  return [
-    {
-      key: "target",
-      title: "总入组目标",
-      value: totalTarget,
-      subtext: "项目整体计划",
-      type: "primary" as const,
-    },
-    {
-      key: "actual",
-      title: "当前入组",
-      value: totalActual,
-      subtext: `达成率 ${totalTarget > 0 ? Math.round((totalActual / totalTarget) * 100) : 0}%`,
-      type: "success" as const,
-    },
-    {
-      key: "centers",
-      title: "活跃中心",
-      value: activeCenters,
-      subtext: `中心总数 ${centers.value.length}`,
-      type: "info" as const,
-    },
-  ];
-});
 
 const buildFallbackCentersFromSites = (siteList: any[]): CenterOverview[] =>
   siteList.map((site: any) => ({
@@ -252,12 +208,6 @@ watch(
   gap: 0;
 }
 
-.kpi-grid {
-  display: grid;
-  gap: 12px;
-  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
-}
-
 .demo-tag {
   border-color: var(--ctms-border-color);
   color: var(--ctms-text-secondary);
diff --git a/frontend/src/views/ia/RiskIssueMonitoringVisits.vue b/frontend/src/views/ia/RiskIssueMonitoringVisits.vue
index b3728bdf..232758f9 100644
--- a/frontend/src/views/ia/RiskIssueMonitoringVisits.vue
+++ b/frontend/src/views/ia/RiskIssueMonitoringVisits.vue
@@ -1,8 +1,8 @@
 <template>
-  <div class="page ctms-page-shell">
+  <div class="page ctms-page-shell page--flush">
     <template v-if="study.currentStudy">
-      <el-card shadow="never" class="main-content-card unified-shell ctms-table-card">
-        <div class="filter-container unified-action-bar">
+      <div class="main-content-flat unified-shell">
+        <div class="filter-container unified-action-bar bar--flush">
           <div class="filter-left">
             <el-form :inline="true" :model="filters" class="filter-form">
               <el-form-item label="问题分类" class="filter-item">
@@ -47,7 +47,7 @@
           </div>
         </div>
 
-        <div class="unified-section table-section">
+        <div class="unified-section table-section section--flush">
           <el-table
             class="issue-table"
             :data="tableRows"
@@ -113,7 +113,7 @@
             />
           </div>
         </div>
-      </el-card>
+      </div>
 
       <el-drawer
         v-model="formDialogVisible"
@@ -723,7 +723,6 @@ watch(
   justify-content: space-between;
   gap: 16px;
   flex-wrap: wrap;
-  padding: 16px 16px 0;
 }
 
 .filter-left {
@@ -734,7 +733,7 @@ watch(
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
   flex-wrap: wrap;
 }
@@ -764,10 +763,6 @@ watch(
   gap: 8px;
 }
 
-.table-section {
-  padding: 12px 0;
-}
-
 .issue-no {
   font-weight: 600;
   color: #24324a;
@@ -823,11 +818,15 @@ watch(
 }
 
 .pagination-wrap {
-  margin: 14px 16px 0;
+  margin: 10px 0 0;
   display: flex;
   justify-content: flex-end;
 }
 
+.issue-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
 .dialog-select {
   width: 100%;
 }
diff --git a/frontend/src/views/ia/RiskIssuePd.vue b/frontend/src/views/ia/RiskIssuePd.vue
index 4a2c49d8..b9c48d49 100644
--- a/frontend/src/views/ia/RiskIssuePd.vue
+++ b/frontend/src/views/ia/RiskIssuePd.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page ctms-page-shell">
-    <el-card shadow="never" class="main-content-card unified-shell ctms-table-card">
-      <div class="filter-container unified-action-bar">
+  <div class="page ctms-page-shell page--flush">
+    <div class="main-content-flat unified-shell">
+      <div class="filter-container unified-action-bar bar--flush">
         <el-form :inline="true" class="filter-form">
           <el-form-item class="filter-item-form">
             <el-input v-model="filters.keyword" :placeholder="TEXT.common.fields.keyword" clearable class="filter-input-comp">
@@ -33,8 +33,8 @@
           </el-form-item>
         </el-form>
       </div>
-      <div class="unified-section table-section">
-        <el-table :data="filteredItems" v-loading="loading" style="width: 100%" table-layout="fixed">
+      <div class="unified-section table-section section--flush-x section--flush-top section--flush-bottom">
+        <el-table :data="filteredItems" v-loading="loading" style="width: 100%" table-layout="fixed" class="risk-table">
           <el-table-column prop="pd_no" :label="TEXT.common.fields.pdNo" min-width="160" show-overflow-tooltip />
           <el-table-column prop="subject_no" :label="TEXT.modules.subjectManagement.screeningNo" min-width="160" show-overflow-tooltip />
           <el-table-column :label="TEXT.common.fields.site" min-width="160" show-overflow-tooltip>
@@ -54,7 +54,7 @@
         </el-table>
         <StateEmpty v-if="!loading && filteredItems.length === 0" :description="TEXT.modules.riskIssuePd.emptyDescription" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -162,21 +162,16 @@ onMounted(load);
   flex-direction: column;
 }
 
-.table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
-}
-
 .filter-form {
   display: flex;
   width: 100%;
   flex-wrap: wrap;
-  gap: 0;
+  gap: 8px;
 }
 
 .filter-item-form {
   margin-bottom: 0;
-  margin-right: 12px;
+  margin-right: 0;
 }
 
 .filter-input-comp {
@@ -191,4 +186,8 @@ onMounted(load);
   margin-bottom: 0;
   margin-right: 0;
 }
+
+.risk-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
 </style>
diff --git a/frontend/src/views/ia/RiskIssueSae.vue b/frontend/src/views/ia/RiskIssueSae.vue
index 94ef9a6f..e148eb01 100644
--- a/frontend/src/views/ia/RiskIssueSae.vue
+++ b/frontend/src/views/ia/RiskIssueSae.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page ctms-page-shell">
-    <el-card shadow="never" class="main-content-card unified-shell ctms-table-card">
-      <div class="filter-container unified-action-bar">
+  <div class="page ctms-page-shell page--flush">
+    <div class="main-content-flat unified-shell">
+      <div class="filter-container unified-action-bar bar--flush">
         <el-form :inline="true" class="filter-form">
           <el-form-item class="filter-item-form">
             <el-input v-model="filters.keyword" :placeholder="TEXT.common.fields.keyword" clearable class="filter-input-comp">
@@ -51,8 +51,8 @@
           </el-form-item>
         </el-form>
       </div>
-      <div class="unified-section table-section">
-        <el-table :data="filteredItems" v-loading="loading" style="width: 100%">
+      <div class="unified-section table-section section--flush-x section--flush-top section--flush-bottom">
+        <el-table :data="filteredItems" v-loading="loading" style="width: 100%" class="risk-table">
           <el-table-column prop="onset_date" :label="TEXT.common.fields.occurDate" width="140">
             <template #default="scope">{{ displayDate(scope.row.onset_date) }}</template>
           </el-table-column>
@@ -82,7 +82,7 @@
         </el-table>
         <StateEmpty v-if="!loading && filteredItems.length === 0" :description="TEXT.modules.riskIssueSae.emptyDescription" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -219,21 +219,16 @@ onMounted(load);
   flex-direction: column;
 }
 
-.table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
-}
-
 .filter-form {
   display: flex;
   width: 100%;
   flex-wrap: wrap;
-  gap: 0;
+  gap: 8px;
 }
 
 .filter-item-form {
   margin-bottom: 0;
-  margin-right: 12px;
+  margin-right: 0;
 }
 
 .filter-input-comp {
@@ -248,4 +243,8 @@ onMounted(load);
   margin-bottom: 0;
   margin-right: 0;
 }
+
+.risk-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
 </style>
diff --git a/frontend/src/views/ia/StartupFeasibilityEthics.vue b/frontend/src/views/ia/StartupFeasibilityEthics.vue
index 651148ca..860e034c 100644
--- a/frontend/src/views/ia/StartupFeasibilityEthics.vue
+++ b/frontend/src/views/ia/StartupFeasibilityEthics.vue
@@ -1,9 +1,9 @@
 <template>
-  <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+  <div class="page ctms-page-shell page--flush">
+    <div class="main-content-flat unified-shell">
       <el-tabs v-model="activeTab" class="ctms-tabs">
         <el-tab-pane :label="TEXT.modules.startupFeasibilityEthics.feasibilityTab" name="feasibility">
-          <div class="ctms-tab-content">
+          <div class="ctms-tab-content unified-section section--flush">
             <div class="ctms-section-header">
               <div class="ctms-section-title">{{ TEXT.modules.startupFeasibilityEthics.feasibilityTab }}</div>
               <div class="ctms-section-actions">
@@ -63,7 +63,7 @@
           </div>
         </el-tab-pane>
         <el-tab-pane :label="TEXT.modules.startupFeasibilityEthics.ethicsTab" name="ethics">
-          <div class="ctms-tab-content">
+          <div class="ctms-tab-content unified-section section--flush">
             <div class="ctms-section-header">
               <div class="ctms-section-title">{{ TEXT.modules.startupFeasibilityEthics.ethicsTab }}</div>
               <div class="ctms-section-actions">
@@ -126,7 +126,7 @@
           </div>
         </el-tab-pane>
       </el-tabs>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -312,7 +312,15 @@ onMounted(() => {
 }
 
 .ctms-tab-content {
-  padding: 12px;
+  gap: 0;
+}
+
+.ctms-tab-content .ctms-section-header {
+  margin-bottom: 0;
+}
+
+.ctms-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 </style>
diff --git a/frontend/src/views/ia/StartupMeetingAuth.vue b/frontend/src/views/ia/StartupMeetingAuth.vue
index c15e7e9d..f8463e19 100644
--- a/frontend/src/views/ia/StartupMeetingAuth.vue
+++ b/frontend/src/views/ia/StartupMeetingAuth.vue
@@ -1,12 +1,12 @@
 <template>
-  <div class="page">
+  <div class="page ctms-page-shell page--flush">
     <div class="unified-shell">
-      <section class="unified-section">
+      <section class="unified-section kickoff-table-section section--flush">
       <el-table
         :data="kickoffRows"
         v-loading="loading"
         style="width: 100%"
-        class="ctms-table"
+        class="ctms-table kickoff-table"
         :row-class-name="kickoffRowClass"
         @row-click="onKickoffRowClick"
       >
@@ -166,6 +166,10 @@ onMounted(() => {
   gap: 0;
 }
 
+.kickoff-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
 </style>
 
 <style>
diff --git a/frontend/src/views/ia/SubjectManagement.vue b/frontend/src/views/ia/SubjectManagement.vue
index 384918aa..95ba6055 100644
--- a/frontend/src/views/ia/SubjectManagement.vue
+++ b/frontend/src/views/ia/SubjectManagement.vue
@@ -1,7 +1,7 @@
 <template>
-  <div class="page ctms-page-shell">
-    <el-card shadow="never" class="main-content-card unified-shell ctms-table-card">
-      <div class="filter-container unified-action-bar">
+  <div class="page ctms-page-shell page--flush">
+    <div class="main-content-flat unified-shell">
+      <div class="filter-container unified-action-bar bar--flush">
         <el-form :inline="true" :model="filters" class="filter-form">
           <el-form-item label="" class="filter-item-form">
             <el-input
@@ -54,7 +54,7 @@
           </el-button>
         </el-form>
       </div>
-      <div class="unified-section table-section">
+      <div class="unified-section table-section section--flush-x section--flush-top section--flush-bottom">
         <el-table
           :data="pagedItems"
           v-loading="loading"
@@ -118,7 +118,7 @@
         </div>
         <StateEmpty v-if="!loading && sortedItems.length === 0" :description="TEXT.modules.subjectManagement.empty" />
       </div>
-    </el-card>
+    </div>
   </div>
 </template>
 
@@ -281,7 +281,7 @@ onMounted(async () => {
 .filter-form {
   display: flex;
   width: 100%;
-  gap: 12px;
+  gap: 8px;
   align-items: center;
 }
 
@@ -300,9 +300,13 @@ onMounted(async () => {
 }
 
 .header-action-btn {
-  height: 36px;
-  padding: 0 20px;
-  border-radius: 8px;
+  height: 32px;
+  padding: 0 12px;
+  border-radius: 10px;
+}
+
+:deep(.ctms-table .el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .subject-info-cell {
@@ -358,7 +362,7 @@ onMounted(async () => {
 .pagination-wrap {
   display: flex;
   justify-content: flex-end;
-  margin-top: 14px;
+  margin-top: 10px;
 }
 </style>
 
diff --git a/frontend/src/views/startup/EthicsDetail.vue b/frontend/src/views/startup/EthicsDetail.vue
index 158575a9..51517993 100644
--- a/frontend/src/views/startup/EthicsDetail.vue
+++ b/frontend/src/views/startup/EthicsDetail.vue
@@ -26,7 +26,7 @@
           </el-descriptions-item>
         </el-descriptions>
       </section>
-      <section class="unified-section">
+      <section class="unified-section attachment-section">
         <AttachmentList
           v-if="recordId"
           :study-id="studyId"
@@ -156,6 +156,18 @@ onMounted(() => {
 });
 </script>
 
+<style scoped>
+.page {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+}
+
+.attachment-section {
+  padding: 0;
+}
+</style>
+
 <style scoped>
 .page {
   display: flex;
diff --git a/frontend/src/views/startup/FeasibilityDetail.vue b/frontend/src/views/startup/FeasibilityDetail.vue
index f08a6d60..a14a398b 100644
--- a/frontend/src/views/startup/FeasibilityDetail.vue
+++ b/frontend/src/views/startup/FeasibilityDetail.vue
@@ -25,7 +25,7 @@
           </el-descriptions-item>
         </el-descriptions>
       </section>
-      <section class="unified-section">
+      <section class="unified-section attachment-section">
         <AttachmentList
           v-if="recordId"
           :study-id="studyId"
@@ -154,6 +154,18 @@ onMounted(() => {
 });
 </script>
 
+<style scoped>
+.page {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+}
+
+.attachment-section {
+  padding: 0;
+}
+</style>
+
 <style scoped>
 .page {
   display: flex;
diff --git a/frontend/src/views/startup/KickoffDetail.vue b/frontend/src/views/startup/KickoffDetail.vue
index 42b0f306..a990fb5b 100644
--- a/frontend/src/views/startup/KickoffDetail.vue
+++ b/frontend/src/views/startup/KickoffDetail.vue
@@ -41,7 +41,7 @@
         </el-descriptions>
       </section>
 
-      <section class="unified-section">
+      <section class="unified-section training-section">
         <div class="training-header">
           <div class="training-title">{{ TEXT.modules.startupMeetingAuth.trainingTab }}</div>
         </div>
@@ -126,7 +126,7 @@
         />
       </section>
 
-      <section v-if="meetingId" class="unified-section">
+      <section v-if="meetingId" class="unified-section attachment-section">
         <div class="attachment-grid">
           <AttachmentList
             v-for="group in kickoffAttachmentGroups"
@@ -448,6 +448,16 @@ onMounted(async () => {
   gap: 0;
 }
 
+.training-section,
+.attachment-section {
+  padding-left: 0;
+  padding-right: 0;
+}
+
+.training-section {
+  padding-top: 0;
+}
+
 .training-header {
   display: flex;
   align-items: center;
diff --git a/frontend/src/views/subjects/SubjectDetail.vue b/frontend/src/views/subjects/SubjectDetail.vue
index a19169ac..36862a54 100644
--- a/frontend/src/views/subjects/SubjectDetail.vue
+++ b/frontend/src/views/subjects/SubjectDetail.vue
@@ -1,6 +1,6 @@
 <template>
-  <div class="page">
-    <div class="page-header unified-action-bar">
+  <div class="page ctms-page-shell page--flush">
+    <div class="page-header unified-action-bar bar--flush">
       <div>
         <h1 class="page-title">{{ detail.subject_no || TEXT.modules.subjectManagement.screeningNo }}</h1>
         <p class="page-subtitle">{{ TEXT.modules.subjectManagement.screeningNo }}</p>
@@ -25,7 +25,7 @@
       </div>
     </div>
 
-    <el-card class="unified-shell" v-loading="loading">
+    <el-card class="unified-shell subject-shell" v-loading="loading">
       <el-descriptions :column="2" border>
         <el-descriptions-item :label="TEXT.modules.subjectManagement.screeningNo">{{ detail.subject_no || TEXT.common.fallback }}</el-descriptions-item>
         <el-descriptions-item :label="TEXT.common.fields.site">{{ siteMap[detail.site_id] || TEXT.common.fallback }}</el-descriptions-item>
@@ -76,7 +76,7 @@
       </el-descriptions>
     </el-card>
 
-    <el-card class="unified-shell">
+    <el-card class="unified-shell subject-shell">
       <el-tabs v-model="activeTab">
         <el-tab-pane :label="TEXT.modules.subjectDetail.tabs.history" name="history">
           <div class="tab-actions">
@@ -84,7 +84,7 @@
               {{ TEXT.common.actions.newHistory }}
             </el-button>
           </div>
-          <el-table :data="historyItems" v-loading="loadingHistory" style="width: 100%">
+          <el-table :data="historyItems" v-loading="loadingHistory" style="width: 100%" class="subject-detail-table">
             <el-table-column prop="record_date" :label="TEXT.common.fields.recordDate" width="140">
               <template #default="scope">{{ displayDate(scope.row.record_date) }}</template>
             </el-table-column>
@@ -121,7 +121,7 @@
               {{ TEXT.common.actions.newVisit }}
             </el-button>
           </div>
-          <el-table :data="visitItems" v-loading="loadingVisits" style="width: 100%">
+          <el-table :data="visitItems" v-loading="loadingVisits" style="width: 100%" class="subject-detail-table">
             <el-table-column prop="visit_code" :label="TEXT.common.fields.visitCode" width="120" />
             <el-table-column prop="planned_date" :label="TEXT.common.fields.plannedDate" min-width="180">
               <template #default="scope">{{ displayDate(scope.row.planned_date) }}</template>
@@ -202,7 +202,7 @@
               {{ TEXT.common.actions.newAe }}
             </el-button>
           </div>
-          <el-table :data="aeItems" v-loading="loadingAes" style="width: 100%">
+          <el-table :data="aeItems" v-loading="loadingAes" style="width: 100%" class="subject-detail-table">
             <el-table-column prop="onset_date" :label="TEXT.common.fields.occurDate" width="140">
               <template #default="scope">{{ displayDate(scope.row.onset_date) }}</template>
             </el-table-column>
@@ -258,7 +258,7 @@
               {{ TEXT.modules.subjectDetail.newPd }}
             </el-button>
           </div>
-          <el-table :data="pdItems" v-loading="loadingPds" style="width: 100%">
+          <el-table :data="pdItems" v-loading="loadingPds" style="width: 100%" class="subject-detail-table">
             <el-table-column prop="pd_no" :label="TEXT.common.fields.pdNo" width="130" />
             <el-table-column prop="pd_type" :label="TEXT.common.fields.pdType" min-width="140" />
             <el-table-column prop="pd_level" :label="TEXT.common.fields.pdLevel" min-width="120">
@@ -1097,7 +1097,7 @@ onMounted(async () => {
 .page {
   display: flex;
   flex-direction: column;
-  gap: 16px;
+  gap: 0;
 }
 
 .page-header {
@@ -1106,6 +1106,16 @@ onMounted(async () => {
   align-items: flex-end;
 }
 
+.subject-shell {
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+}
+
+.subject-shell :deep(.el-card__body) {
+  padding: 0;
+}
+
 .page-title {
   margin: 0;
   font-size: 22px;
@@ -1126,7 +1136,11 @@ onMounted(async () => {
 .tab-actions {
   display: flex;
   justify-content: flex-end;
-  margin-bottom: 12px;
+  margin-bottom: 10px;
+}
+
+.subject-detail-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .ae-type-tag {
diff --git a/frontend/src/views/workbench/components/CenterSummary.vue b/frontend/src/views/workbench/components/CenterSummary.vue
index a3597871..c13dc099 100644
--- a/frontend/src/views/workbench/components/CenterSummary.vue
+++ b/frontend/src/views/workbench/components/CenterSummary.vue
@@ -10,7 +10,7 @@
         style="width: 100%" 
         v-loading="loading"
         empty-text="暂无数据"
-        class="custom-table"
+        class="custom-table center-summary-table"
       >
         <el-table-column prop="name" label="管理中心" min-width="180">
           <template #default="{ row }">
@@ -65,6 +65,29 @@ const getStageType = (status?: string) => {
   margin-bottom: 24px;
 }
 
+.summary-table-container {
+  overflow: hidden;
+}
+
+.center-summary-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
+}
+
+.summary-table-container :deep(.el-table th.el-table__cell) {
+  background: #f7f9fc;
+}
+
+.summary-table-container :deep(.el-table td.el-table__cell),
+.summary-table-container :deep(.el-table th.el-table__cell) {
+  padding-left: 0;
+  padding-right: 0;
+}
+
+.summary-table-container :deep(.el-table td.el-table__cell) {
+  padding-top: 7px;
+  padding-bottom: 7px;
+}
+
 .box-header {
   margin-bottom: 16px;
 }