diff --git a/apps/write/frontend/src/App.vue b/apps/write/frontend/src/App.vue
index 51fdcff..4ec5ae4 100644
--- a/apps/write/frontend/src/App.vue
+++ b/apps/write/frontend/src/App.vue
@@ -16,33 +16,39 @@ const recording = ref(false)
 
 onMounted(() => applyLayoutVars())
 
-// ====== 拖拽布局：sidebar 宽（px） + editor/preview 比例（0-1）======
+// ====== 拖拽布局 ======
+// sidebarW: 侧栏宽(px) | editorRatio: 源码/预览比例(0-1) | inputH: 输入框高(px)
 const sidebarW = ref(parseInt(localStorage.getItem('write.sidebarW') || '260'))
 const editorRatio = ref(parseFloat(localStorage.getItem('write.editorRatio') || '0.5'))
+const inputH = ref(parseInt(localStorage.getItem('write.inputH') || '140'))
 
 function applyLayoutVars(): void {
   const r = document.documentElement
   r.style.setProperty('--sidebar-w', sidebarW.value + 'px')
   r.style.setProperty('--editor-fr', editorRatio.value + 'fr')
   r.style.setProperty('--preview-fr', (1 - editorRatio.value) + 'fr')
+  r.style.setProperty('--input-h', inputH.value + 'px')
 }
 
-let dragKind: 'sidebar' | 'editor' | null = null
-let dragStartX = 0
+type DragKind = 'sidebar' | 'editor' | 'input'
+let dragKind: DragKind | null = null
+let dragStartPos = 0
 let dragStartVal = 0
 let dragPaneW = 0
 
-function startDrag(e: MouseEvent, kind: 'sidebar' | 'editor'): void {
+function startDrag(e: MouseEvent, kind: DragKind): void {
   dragKind = kind
-  dragStartX = e.clientX
+  dragStartPos = kind === 'input' ? e.clientY : e.clientX
   if (kind === 'sidebar') {
     dragStartVal = sidebarW.value
-  } else {
+  } else if (kind === 'editor') {
     dragStartVal = editorRatio.value
     const pane = (e.currentTarget as HTMLElement).parentElement
     dragPaneW = pane ? pane.offsetWidth : window.innerWidth
+  } else {
+    dragStartVal = inputH.value
   }
-  document.body.style.cursor = 'col-resize'
+  document.body.style.cursor = kind === 'input' ? 'row-resize' : 'col-resize'
   document.body.style.userSelect = 'none'
   window.addEventListener('mousemove', onDrag)
   window.addEventListener('mouseup', endDrag)
@@ -50,12 +56,17 @@ function startDrag(e: MouseEvent, kind: 'sidebar' | 'editor'): void {
 }
 function onDrag(e: MouseEvent): void {
   if (!dragKind) return
-  const dx = e.clientX - dragStartX
-  if (dragKind === 'sidebar') {
-    sidebarW.value = Math.max(180, Math.min(500, dragStartVal + dx))
+  if (dragKind === 'input') {
+    const dy = dragStartPos - e.clientY  // 向上拖 = 高度变大
+    inputH.value = Math.max(60, Math.min(window.innerHeight - 200, dragStartVal + dy))
   } else {
-    const newR = dragStartVal + dx / Math.max(1, dragPaneW)
-    editorRatio.value = Math.max(0.15, Math.min(0.85, newR))
+    const dx = e.clientX - dragStartPos
+    if (dragKind === 'sidebar') {
+      sidebarW.value = Math.max(180, Math.min(500, dragStartVal + dx))
+    } else {
+      const newR = dragStartVal + dx / Math.max(1, dragPaneW)
+      editorRatio.value = Math.max(0.15, Math.min(0.85, newR))
+    }
   }
   applyLayoutVars()
 }
@@ -63,6 +74,7 @@ function endDrag(): void {
   if (!dragKind) return
   localStorage.setItem('write.sidebarW', String(sidebarW.value))
   localStorage.setItem('write.editorRatio', String(editorRatio.value))
+  localStorage.setItem('write.inputH', String(inputH.value))
   dragKind = null
   document.body.style.cursor = ''
   document.body.style.userSelect = ''
@@ -318,6 +330,8 @@ onMounted(() => {
         <div class="preview" v-html="renderedPreview"></div>
       </div>
 
+      <div class="splitter splitter-input" @mousedown="startDrag($event, 'input')" title="拖动调整输入框高度"></div>
+
       <div class="input-bar">
         <div class="input-row">
           <textarea
diff --git a/apps/write/frontend/src/styles.css b/apps/write/frontend/src/styles.css
index ca96f04..4c809fb 100644
--- a/apps/write/frontend/src/styles.css
+++ b/apps/write/frontend/src/styles.css
@@ -79,7 +79,7 @@ textarea, input { font: inherit; }
 
 .workspace {
   display: grid;
-  grid-template-rows: 1fr auto;
+  grid-template-rows: 1fr 6px var(--input-h, 140px);
   min-width: 0;
   min-height: 0;
   background: #fafafa;
@@ -108,6 +108,9 @@ textarea, input { font: inherit; }
 .splitter:hover { background: #b0c5ff; }
 .splitter-main { /* sidebar | workspace */ }
 .splitter-editor { /* editor | preview */ }
+.splitter-input { /* editor-pane | input-bar 横向分隔 */
+  cursor: row-resize;
+}
 @media (max-width: 768px) {
   .splitter { display: none; }
 }