diff --git a/src/components/ideas/IdeaDetail.vue b/src/components/ideas/IdeaDetail.vue
index 8d34c24..1389c1d 100644
--- a/src/components/ideas/IdeaDetail.vue
+++ b/src/components/ideas/IdeaDetail.vue
@@ -850,4 +850,11 @@ watch(() => props.idea.id, loadHistory)
   border-color: var(--df-accent);
   background: var(--df-bg-raised);
 }
+
+/* ═══ 响应式:窄屏对抗式评估双栏堆叠 ═══ */
+@media (max-width: 760px) {
+  .debate-container {
+    grid-template-columns: 1fr;
+  }
+}
 </style>
diff --git a/src/styles/global.css b/src/styles/global.css
index e4b55c6..57da44b 100644
--- a/src/styles/global.css
+++ b/src/styles/global.css
@@ -193,7 +193,7 @@ html, body, #app {
   border: 0.5px solid var(--df-border);
   border-radius: var(--df-radius-lg);
   padding: 24px;
-  min-width: 360px;
+  min-width: min(360px, 90vw);
   max-width: 90vw;
 }
 .modal-title { font-size: 18px; font-weight: 500; color: var(--df-text); margin-bottom: 16px; }
@@ -227,7 +227,7 @@ html, body, #app {
 .back-link:hover { text-decoration: underline; }
 
 /* — Filter Bar(列表页筛选 + 搜索)— Ideas / Tasks 共享 */
-.filter-bar { display: flex; gap: 8px; margin-bottom: var(--df-gap-page); align-items: center; }
+.filter-bar { display: flex; gap: 8px; margin-bottom: var(--df-gap-page); align-items: center; flex-wrap: wrap; }
 .filter-btn {
   padding: 6px 14px;
   border: 0.5px solid var(--df-border);
diff --git a/src/views/Dashboard.vue b/src/views/Dashboard.vue
index f47bbaf..715bf7a 100644
--- a/src/views/Dashboard.vue
+++ b/src/views/Dashboard.vue
@@ -140,8 +140,8 @@ onMounted(() => {
 
 /* ═══ Responsive ═══ */
 
-/* 窄窗口：单栏 */
-@media (max-width: 900px) {
+/* 窄窗口：单栏(与 AppLayout 768px 断点对齐) */
+@media (max-width: 768px) {
   .dashboard { padding: 12px 14px 16px; }
   .dash-grid { grid-template-columns: 1fr; }
   .dash-right { flex-direction: row; flex-wrap: wrap; gap: 10px; }
diff --git a/src/views/Ideas.vue b/src/views/Ideas.vue
index a0771c8..969323f 100644
--- a/src/views/Ideas.vue
+++ b/src/views/Ideas.vue
@@ -498,14 +498,11 @@ watch(() => route.params.id, (id) => {
 /* empty-state / empty-icon 已提取到 global.css 全局 */
 
 /* ===== 响应式 ===== */
-@media (max-width: 900px) {
+@media (max-width: 768px) {
   .ideas { padding: 16px; }
   .ideas-layout {
     grid-template-columns: 1fr;
   }
-  .filter-bar {
-    flex-wrap: wrap;
-  }
   .search-box {
     max-width: 100%;
     order: -1;
diff --git a/src/views/ProjectDetail.vue b/src/views/ProjectDetail.vue
index d904963..6b21a51 100644
--- a/src/views/ProjectDetail.vue
+++ b/src/views/ProjectDetail.vue
@@ -821,7 +821,7 @@ onUnmounted(() => {
 }
 
 /* ===== 响应式 ===== */
-@media (max-width: 900px) {
+@media (max-width: 768px) {
   .project-detail { padding: 16px; }
   .detail-grid {
     grid-template-columns: 1fr;
diff --git a/src/views/Projects.vue b/src/views/Projects.vue
index 91013a4..f4affce 100644
--- a/src/views/Projects.vue
+++ b/src/views/Projects.vue
@@ -496,7 +496,7 @@ async function runImport() {
 .trash-actions { display: flex; gap: 8px; }
 
 /* ===== 响应式 ===== */
-@media (max-width: 900px) {
+@media (max-width: 768px) {
   .projects { padding: 16px; }
   .project-grid {
     grid-template-columns: 1fr;
diff --git a/src/views/Tasks.vue b/src/views/Tasks.vue
index 71038d9..45fb794 100644
--- a/src/views/Tasks.vue
+++ b/src/views/Tasks.vue
@@ -458,6 +458,8 @@ onUnmounted(() => {
 /* 搜索框 */
 .search-input {
   width: 220px;
+  max-width: 100%;
+  flex: 1 1 220px;
   padding: 6px 12px;
   border: 0.5px solid var(--df-border);
   border-radius: var(--df-radius-sm);