diff --git a/apps/web/src/api/assets/assets.ts b/apps/web/src/api/assets/assets.ts
index c436295c5..96a5b0840 100644
--- a/apps/web/src/api/assets/assets.ts
+++ b/apps/web/src/api/assets/assets.ts
@@ -52,12 +52,37 @@ export const getAssetsByKind = async (
 /**
  * 智能匹配素材（后端 AI 选素材）
  * 调用后端 smart-match 端点，由后端根据素材库内容智能选择素材
+ *
+ * 后端返回 items 元素兼容两种结构（过渡期）：
+ * - 扁平结构：AssetItem 本身（id 在顶层）
+ * - 包装结构：{ asset: AssetItem, score, breakdown }（id 需从 .asset 取）
+ * 这里统一归一化为 AssetItem[]，调用方无需关心包装层。
  */
-export const smartMatchAssets = async (libraryId: string): Promise<{ items: AssetItem[] }> => {
+export interface SmartMatchResult {
+  items: AssetItem[]
+}
+
+interface SmartMatchWrappedItem {
+  asset?: AssetItem
+  id?: string
+  score?: number
+  breakdown?: unknown
+}
+
+export const smartMatchAssets = async (libraryId: string): Promise<SmartMatchResult> => {
   const response = await apiClient.post("/assets/smart-match", {
     library_id: libraryId,
   })
-  return response.data
+  const rawItems: SmartMatchWrappedItem[] = response.data?.items ?? []
+  const items = rawItems
+    .map((it) =>
+      // 包装结构 { asset: {...} } 优先解包；否则视其本身为扁平 AssetItem
+      it?.asset && typeof it.asset === "object" && "id" in it.asset
+        ? it.asset
+        : (it as unknown as AssetItem),
+    )
+    .filter((it): it is AssetItem => !!it && typeof it.id === "string" && it.id.length > 0)
+  return { items }
 }
 
 /** 更新素材（名称、metadata 等） */
diff --git a/apps/web/src/pages/assets/assets.css b/apps/web/src/pages/assets/assets.css
index ca9c0b019..f237ae738 100644
--- a/apps/web/src/pages/assets/assets.css
+++ b/apps/web/src/pages/assets/assets.css
@@ -147,44 +147,52 @@
 /* ============================================================
    上传区域
    ============================================================ */
-.xx-asset-upload-zone {
-  border: 2px dashed var(--border-color);
-  border-radius: var(--radius-lg);
-  padding: var(--space-2xl) var(--space-xl);
-  text-align: center;
-  background: var(--bg-secondary);
-  cursor: pointer;
+.xx-asset-upload-entry {
+  display: flex;
+  align-items: center;
+  gap: var(--space-md);
+  flex-wrap: wrap;
+  padding: var(--space-sm) var(--space-md);
+  border: 1px dashed transparent;
+  border-radius: var(--radius-md);
   transition: var(--transition-all);
 }
 
-.xx-asset-upload-zone:hover {
+.xx-asset-upload-entry-dragover {
   border-color: var(--primary-color);
   background: var(--primary-soft);
 }
 
-.xx-asset-upload-zone:active {
-  border-style: solid;
-  transform: scale(0.99);
-  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
-}
-
-.xx-asset-upload-icon {
-  font-size: 40px;
-  margin-bottom: var(--space-sm);
-  color: var(--primary-color);
-}
-
-.xx-asset-upload-text {
-  font-size: var(--font-size-base) !important;
-  color: var(--text-primary) !important;
-  margin: 0 0 var(--space-xs) !important;
+.xx-asset-upload-btn {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--space-xs);
+  padding: 6px 16px;
+  font-size: var(--font-size-sm);
   font-weight: var(--font-weight-medium);
+  color: var(--text-inverse);
+  background: var(--primary-color);
+  border: none;
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  transition: var(--transition-all);
+  white-space: nowrap;
 }
 
-.xx-asset-upload-hint {
-  font-size: var(--font-size-sm) !important;
-  color: var(--text-tertiary) !important;
-  margin: 0 !important;
+.xx-asset-upload-btn:hover {
+  opacity: 0.9;
+}
+
+.xx-asset-upload-btn:active {
+  transform: scale(0.98);
+}
+
+.xx-asset-upload-status {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--space-xs);
+  font-size: var(--font-size-xs);
+  color: var(--text-tertiary);
 }
 
 /* ============================================================
@@ -397,26 +405,46 @@
   display: flex;
   justify-content: space-between;
   align-items: center;
+  gap: var(--space-xs);
   font-size: var(--font-size-xs);
   color: var(--text-secondary);
-  margin-bottom: var(--space-sm);
+  margin-bottom: 4px;
+  min-width: 0;
 }
 
-/* 状态标签 + 余量角标行 */
-.xx-asset-meta-left {
+/* 状态标签行：标签过长省略 */
+.xx-asset-meta-status {
   display: inline-flex;
   align-items: center;
-  gap: var(--space-xs);
   min-width: 0;
 }
 
+.xx-asset-meta-status .xx-status-pill {
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.xx-asset-meta-duration {
+  flex-shrink: 0;
+  color: var(--text-tertiary);
+  font-variant-numeric: tabular-nums;
+}
+
+/* 余量标签独占一行 */
+.xx-asset-meta-usage {
+  justify-content: flex-start;
+  margin-bottom: var(--space-xs);
+}
+
 /* 视频素材余量角标（仅状态展示，不影响卡片操作） */
 .xx-asset-usage-badge {
   display: inline-flex;
   align-items: center;
-  padding: var(--space-xxs) var(--space-sm);
+  padding: 1px 6px;
   border-radius: var(--radius-full);
-  font-size: var(--font-size-xs);
+  font-size: 10px;
   font-weight: var(--font-weight-medium);
   line-height: 1.5;
   white-space: nowrap;
@@ -481,12 +509,16 @@
 .xx-status-pill {
   display: inline-flex;
   align-items: center;
-  gap: var(--space-xs);
-  padding: var(--space-xxs) var(--space-sm);
+  gap: 2px;
+  padding: 1px 6px;
   border-radius: var(--radius-full);
-  font-size: var(--font-size-xs);
+  font-size: 10px;
   font-weight: var(--font-weight-medium);
   line-height: 1.5;
+  white-space: nowrap;
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .xx-status-pill-ok {
diff --git a/apps/web/src/pages/assets/components/AssetCard.tsx b/apps/web/src/pages/assets/components/AssetCard.tsx
index a89293330..b0b0ea21c 100644
--- a/apps/web/src/pages/assets/components/AssetCard.tsx
+++ b/apps/web/src/pages/assets/components/AssetCard.tsx
@@ -128,16 +128,18 @@ const AssetCard: React.FC<AssetCardProps> = ({
           {asset.name}
         </p>
         <div className="xx-asset-meta">
-          <span className="xx-asset-meta-left">
+          <span className="xx-asset-meta-status">
             <StatusPill status={asset.status} label={asset.statusLabel} />
-            {usageBadge && (
-              <span className={`xx-asset-usage-badge xx-asset-usage-badge-${usageBadge.variant}`}>
-                {usageBadge.label}
-              </span>
-            )}
           </span>
-          {asset.duration && <span>{asset.duration}</span>}
+          {asset.duration && <span className="xx-asset-meta-duration">{asset.duration}</span>}
         </div>
+        {usageBadge && (
+          <div className="xx-asset-meta xx-asset-meta-usage">
+            <span className={`xx-asset-usage-badge xx-asset-usage-badge-${usageBadge.variant}`}>
+              {usageBadge.label}
+            </span>
+          </div>
+        )}
         <button
           className={`xx-asset-diagnose-btn${diagnosing ? " xx-asset-diagnose-btn-loading" : ""}`}
           disabled={diagnosing || asset.loading || asset.status === "bad"}
diff --git a/apps/web/src/pages/assets/components/AssetUploadZone.tsx b/apps/web/src/pages/assets/components/AssetUploadZone.tsx
index 7d8ce256b..bb9abdac8 100644
--- a/apps/web/src/pages/assets/components/AssetUploadZone.tsx
+++ b/apps/web/src/pages/assets/components/AssetUploadZone.tsx
@@ -1,10 +1,10 @@
 /**
- * AssetLibrary 上传拖拽区域
- * 多文件拖入即入队（并发由 useAssetUpload 队列控制，最多 3 路直传）
+ * AssetLibrary 上传入口（紧凑按钮模式）
+ * - 点击按钮打开文件选择（多选），多文件入队由 useAssetUpload 队列控制（最多 3 路直传）
+ * - 拖拽文件到内容区任意位置同样触发上传（不再占用大面积虚线框）
  */
-import React from "react"
-import { Upload } from "antd"
-import { InboxOutlined } from "@ant-design/icons"
+import React, { useRef, useState } from "react"
+import { PlusOutlined, CloudUploadOutlined } from "@ant-design/icons"
 
 export interface AssetUploadZoneProps {
   uploading: boolean
@@ -19,30 +19,73 @@ export const AssetUploadZone: React.FC<AssetUploadZoneProps> = ({
   pendingCount,
   onUpload,
 }) => {
+  const inputRef = useRef<HTMLInputElement>(null)
+  // dragenter/dragleave 在经过子元素时会成对触发，用计数器避免高亮闪烁；
+  // 计数器归零（拖拽真正离开容器）才取消高亮
+  const dragDepthRef = useRef(0)
+  const [dragOver, setDragOver] = useState(false)
+
+  const pickFiles = (list: FileList | null) => {
+    if (!list || list.length === 0) return
+    onUpload(Array.from(list))
+  }
+
   return (
-    <Upload.Dragger
-      beforeUpload={(file) => {
-        // antd 多选时会对每个文件同步连续触发一次 beforeUpload；
-        // 每次只入队当前文件，React 批处理保证多文件一次性渲染
-        onUpload([file as File])
-        return false
+    <div
+      className={`xx-asset-upload-entry${dragOver ? " xx-asset-upload-entry-dragover" : ""}`}
+      onDragEnter={(e) => {
+        e.preventDefault()
+        dragDepthRef.current += 1
+        setDragOver(true)
+      }}
+      onDragOver={(e) => {
+        e.preventDefault()
+      }}
+      onDragLeave={(e) => {
+        e.preventDefault()
+        dragDepthRef.current = Math.max(0, dragDepthRef.current - 1)
+        if (dragDepthRef.current === 0) {
+          setDragOver(false)
+        }
+      }}
+      onDrop={(e) => {
+        e.preventDefault()
+        dragDepthRef.current = 0
+        setDragOver(false)
+        pickFiles(e.dataTransfer.files)
       }}
-      showUploadList={false}
-      multiple
-      accept="video/*,image/*"
     >
-      <div className="xx-asset-upload-zone">
-        <p className="xx-asset-upload-icon">
-          <InboxOutlined />
-        </p>
-        <p className="xx-asset-upload-text">
-          {uploading
-            ? `上传中…（进行 ${activeCount} 个${pendingCount > 0 ? `，排队 ${pendingCount} 个` : ""}）`
-            : "点击或拖拽文件到此区域上传"}
-        </p>
-        <p className="xx-asset-upload-hint">支持视频、图片，单文件不超过 2GB；多文件自动排队上传</p>
-      </div>
-    </Upload.Dragger>
+      <button
+        type="button"
+        className="xx-asset-upload-btn"
+        onClick={() => inputRef.current?.click()}
+      >
+        <PlusOutlined />
+        上传素材
+      </button>
+      <span className="xx-asset-upload-status">
+        {uploading ? (
+          <>
+            <CloudUploadOutlined />
+            上传中…（进行 {activeCount} 个{pendingCount > 0 ? `，排队 ${pendingCount} 个` : ""}）
+          </>
+        ) : (
+          "视频、图片均可，单文件不超过 2GB；也可直接拖拽文件到此区域"
+        )}
+      </span>
+      <input
+        ref={inputRef}
+        type="file"
+        multiple
+        accept="video/*,image/*"
+        style={{ display: "none" }}
+        onChange={(e) => {
+          pickFiles(e.target.files)
+          // 允许连续选择同一文件
+          e.target.value = ""
+        }}
+      />
+    </div>
   )
 }
 
diff --git a/apps/web/src/pages/generate/components/Step5VoiceSelect.tsx b/apps/web/src/pages/generate/components/Step5VoiceSelect.tsx
index bab81fd51..166dc4eed 100644
--- a/apps/web/src/pages/generate/components/Step5VoiceSelect.tsx
+++ b/apps/web/src/pages/generate/components/Step5VoiceSelect.tsx
@@ -27,6 +27,13 @@ const getFileSize = (item: AssetItem): number => {
   return item.file_size ?? (item.metadata?.file_size as number) ?? 0
 }
 
+/** 是否为 AI 音色（克隆/预置音色模型：无固定时长、无实体音频文件，按脚本实时合成） */
+const isAiVoice = (item: AssetItem): boolean => {
+  const duration = getDuration(item)
+  const size = getFileSize(item)
+  return (!duration || duration <= 0) && (!size || size <= 0)
+}
+
 const formatDuration = (seconds?: number): string => {
   if (!seconds || seconds <= 0) return "00:00"
   const m = Math.floor(seconds / 60)
@@ -96,10 +103,10 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
   /** 选中素材（含时长校验） */
   const handleSelect = useCallback(
     (id: string) => {
-      // 如果启用了时长校验，且配音时长不足
+      // 如果启用了时长校验，且配音时长不足（AI 音色按脚本实时合成，不参与时长校验）
       if (totalVideoDuration > 0) {
         const material = materials.find((m) => m.id === id)
-        if (material && getDuration(material) < totalVideoDuration) {
+        if (material && !isAiVoice(material) && getDuration(material) < totalVideoDuration) {
           setPendingVoiceId(id)
           setDurationWarningOpen(true)
           return
@@ -280,25 +287,29 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
                   alignItems: "center",
                 }}
               >
-                <span style={{ display: "flex", alignItems: "center", gap: 4 }}>
-                  {formatDuration(getDuration(item))}
-                  {totalVideoDuration > 0 && getDuration(item) < Number(totalVideoDuration) && (
-                    <span
-                      style={{
-                        color: "#ff4d4f",
-                        fontSize: 11,
-                        fontWeight: 500,
-                        display: "inline-flex",
-                        alignItems: "center",
-                        gap: 2,
-                      }}
-                    >
-                      <WarningOutlined />
-                      时长不足
-                    </span>
-                  )}
-                </span>
-                <span>{formatFileSize(getFileSize(item))}</span>
+                {isAiVoice(item) ? (
+                  <span style={{ color: "#1677ff", fontWeight: 500 }}>AI 音色</span>
+                ) : (
+                  <span style={{ display: "flex", alignItems: "center", gap: 4 }}>
+                    {formatDuration(getDuration(item))}
+                    {totalVideoDuration > 0 && getDuration(item) < Number(totalVideoDuration) && (
+                      <span
+                        style={{
+                          color: "#ff4d4f",
+                          fontSize: 11,
+                          fontWeight: 500,
+                          display: "inline-flex",
+                          alignItems: "center",
+                          gap: 2,
+                        }}
+                      >
+                        <WarningOutlined />
+                        时长不足
+                      </span>
+                    )}
+                  </span>
+                )}
+                <span>{isAiVoice(item) ? "按文本合成" : formatFileSize(getFileSize(item))}</span>
               </div>
             </div>
           )
diff --git a/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts b/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts
index 997b4f61d..bf1733d33 100755
--- a/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts
+++ b/apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts
@@ -43,9 +43,11 @@ export function useSmartMatch({
 
     try {
       // 调用后端智能匹配 API（后端也会排除已用尽素材，这里前端兜底过滤）
+      // items 已在 API 层归一化（兼容后端 {asset, score} 包装结构）；
+      // 这里再过滤一遍无 id/已用尽项，杜绝 undefined id 流入预览链路
       const result = await smartMatchAssets(libraryId)
-      const matched = (result.items ?? []).filter(isAssetUsable)
-      const matchedIds = matched.map((a: AssetItem) => a.id)
+      const matched = (result.items ?? []).filter((a) => !!a?.id && isAssetUsable(a))
+      const matchedIds = matched.map((a) => a.id)
 
       if (matchedIds.length > 0) {
         onSmartSelectedIdsChange(matchedIds)
diff --git a/apps/web/src/pages/generate/hooks/usePreviewAssets.ts b/apps/web/src/pages/generate/hooks/usePreviewAssets.ts
index 69d221a26..7bf8e801e 100644
--- a/apps/web/src/pages/generate/hooks/usePreviewAssets.ts
+++ b/apps/web/src/pages/generate/hooks/usePreviewAssets.ts
@@ -15,12 +15,14 @@ import type { AxiosResponse } from "axios"
  * 使用 Promise.allSettled 确保单个失败不影响整体
  */
 async function fetchAssetsByIds(ids: string[]): Promise<AssetItem[]> {
-  if (!ids.length) return []
+  // 防御：过滤空值/undefined/非字符串 id，避免发出 /assets/undefined 请求
+  const validIds = ids.filter((id): id is string => typeof id === "string" && id.length > 0)
+  if (!validIds.length) return []
 
   try {
     const { default: apiClient } = await import("@/api/client")
     const results = await Promise.allSettled(
-      ids.map((id) => apiClient.get<AssetItem>(`/assets/${id}`)),
+      validIds.map((id) => apiClient.get<AssetItem>(`/assets/${id}`)),
     )
     return results
       .filter(
@@ -57,7 +59,10 @@ export function usePreviewAssets(assetIds: string[], enabled: boolean): UsePrevi
   const stableAssetIds = useStableArray(assetIds)
 
   const load = useCallback(async () => {
-    if (!stableAssetIds.length || !enabled) {
+    const validIds = stableAssetIds.filter(
+      (id): id is string => typeof id === "string" && id.length > 0,
+    )
+    if (!validIds.length || !enabled) {
       setAssets([])
       setReady(false)
       return
@@ -68,7 +73,7 @@ export function usePreviewAssets(assetIds: string[], enabled: boolean): UsePrevi
     setReady(false)
 
     try {
-      const result = await fetchAssetsByIds(stableAssetIds)
+      const result = await fetchAssetsByIds(validIds)
       // 防止竞态：只保留最新请求的结果
       if (requestIdRef.current === thisRequestId) {
         setAssets(result)