diff --git a/video-gen-app/src/pages/GenerateConver.tsx b/video-gen-app/src/pages/GenerateConver.tsx
index 652669dd..8c8cd17a 100644
--- a/video-gen-app/src/pages/GenerateConver.tsx
+++ b/video-gen-app/src/pages/GenerateConver.tsx
@@ -1569,7 +1569,7 @@ const AIChatPage: React.FC = () => {
                               lineHeight: 1.6,
                               cursor: 'pointer',
                               transition: 'all 0.2s ease',
-                              boxShadow: '0 1px 3px rgba(99, 102, 241, 0.04)',
+                              boxShadow: '0 1px 2px rgba(15, 23, 42, 0.03)',
                             }}
                             onMouseEnter={() => {
                               setExpandedPrompts(prev => {
@@ -1726,7 +1726,7 @@ const AIChatPage: React.FC = () => {
                   borderRadius: 12,
                   boxShadow: '0 4px 20px rgba(0,0,0,0.15)',
                   padding: 16,
-                  minWidth: 200,
+                  minWidth: 174,
                   zIndex: 9999,
                 }}
                 onClick={(e) => e.stopPropagation()}
@@ -1805,19 +1805,18 @@ const AIChatPage: React.FC = () => {
           {/* 输入区域 - 始终显示 */}
           <div
             style={{
-              background: 'rgba(255,255,255,0.15)',
-              backdropFilter: 'blur(24px)',
-              borderRadius: 24,
-              padding: 16,
-              boxShadow: '0 12px 40px rgba(99, 102, 241, 0.12), 0 4px 16px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.6)',
-              transition: 'all 0.3s ease',
-              border: '1px solid rgba(99, 102, 241, 0.12)',
+              background: '#ffffff',
+              borderRadius: 22,
+              padding: '16px 18px',
+              boxShadow: '0 10px 28px rgba(15, 23, 42, 0.06)',
+              transition: 'all 0.25s ease',
+              border: '1px solid #eef1f5',
             }}
           >
-            {/* 左右布局容器 */}
-            <div style={{ display: 'flex', gap: 16, marginBottom: 14 }}>
-              {/* 左侧附件区域 - 20% */}
-              <div style={{ width: '20%', minWidth: 100, display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'flex-start' }}>
+            {/* 上方输入布局 */}
+            <div style={{ display: 'flex', gap: 16, alignItems: 'flex-start', marginBottom: 14 }}>
+              {/* 左侧附件区域 */}
+              <div style={{ width: 68, minWidth: 68, display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'flex-start', paddingTop: 2 }}>
                 {/* 首尾帧模式 */}
                 {mediaType === 'video' && referenceMode === 'first_last_frame' ? (
                   <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', gap: 6, width: '100%' }}>
@@ -2010,11 +2009,11 @@ const AIChatPage: React.FC = () => {
                   <>
                     {currentMedia.length > 0 ? (
                       <div
-                        style={{ position: 'relative', width: '100%', minHeight: 80, display: 'flex', justifyContent: 'center' }}
+                        style={{ position: 'relative', width: '100%', minHeight: 62, display: 'flex', justifyContent: 'center' }}
                         onMouseEnter={() => setMediaStackHovered(true)}
                         onMouseLeave={() => setMediaStackHovered(false)}
                       >
-                        <div style={{ position: 'relative', width: 70, height: 70 }}>
+                        <div style={{ position: 'relative', width: 54, height: 62 }}>
                           {currentMedia.slice(0, 4).map((media, idx) => {
                             const reversedIdx = currentMedia.slice(0, 4).length - 1 - idx;
                             const offsetX = mediaStackHovered ? idx * 6 : idx * 3;
@@ -2032,7 +2031,7 @@ const AIChatPage: React.FC = () => {
                                   opacity: mediaStackHovered ? 1 : (1 - reversedIdx * 0.18),
                                 }}
                               >
-                                <div style={{ position: 'relative', width: 60, height: 60 }}>
+                                <div style={{ position: 'relative', width: 50, height: 58 }}>
                                   {media.type === 'image' ? (
                                     <img
                                       src={`${import.meta.env.VITE_API_BASE || "http://localhost:8000"}${media.url}`}
@@ -2043,7 +2042,7 @@ const AIChatPage: React.FC = () => {
                                         setAttachmentPreviewName(media.name);
                                         setAttachmentPreviewVisible(true);
                                       }}
-                                      style={{ width: 60, height: 60, objectFit: 'cover', borderRadius: 8, cursor: 'pointer', border: '2px solid rgba(255,255,255,0.9)', boxShadow: '0 2px 8px rgba(99, 102, 241, 0.2)' }}
+                                      style={{ width: 50, height: 58, objectFit: 'cover', borderRadius: 8, cursor: 'pointer', border: '2px solid rgba(255,255,255,0.95)', boxShadow: '0 2px 8px rgba(15, 23, 42, 0.12)' }}
                                     />
                                   ) : (
                                     <video
@@ -2055,7 +2054,7 @@ const AIChatPage: React.FC = () => {
                                         setAttachmentPreviewName(media.name);
                                         setAttachmentPreviewVisible(true);
                                       }}
-                                      style={{ width: 60, height: 60, objectFit: 'cover', borderRadius: 8, cursor: 'pointer', border: '2px solid rgba(255,255,255,0.9)', boxShadow: '0 2px 8px rgba(99, 102, 241, 0.2)' }}
+                                      style={{ width: 50, height: 58, objectFit: 'cover', borderRadius: 8, cursor: 'pointer', border: '2px solid rgba(255,255,255,0.95)', boxShadow: '0 2px 8px rgba(15, 23, 42, 0.12)' }}
                                     />
                                   )}
                                   <button
@@ -2096,7 +2095,7 @@ const AIChatPage: React.FC = () => {
 
                     {/* 上传按钮 - 非首尾帧模式且还有上传空间时显示 */}
                     {!(mediaType === 'video' && referenceMode === 'first_last_frame') && (
-                      <div style={{ marginTop: currentMedia.length > 0 ? 8 : 0, width: '100%', maxWidth: 70, display: 'flex', justifyContent: 'center' }}>
+                      <div style={{ marginTop: currentMedia.length > 0 ? 6 : 0, width: '100%', maxWidth: 58, display: 'flex', justifyContent: 'center' }}>
                         <Upload
                           accept={mediaType === 'image' ? 'image/*' : 'image/*,video/*'}
                           showUploadList={false}
@@ -2108,30 +2107,39 @@ const AIChatPage: React.FC = () => {
                           }>
                             <div
                               style={{
-                                width: 70,
-                                aspectRatio: '1',
-                                borderRadius: 10,
-                                border: '2px dashed rgba(99, 102, 241, 0.3)',
+                                width: 48,
+                                height: 68,
+                                borderRadius: 6,
+                                border: '1px solid #eef1f5',
                                 display: 'flex',
                                 alignItems: 'center',
                                 justifyContent: 'center',
                                 cursor: 'pointer',
                                 transition: 'all 0.25s ease',
-                                backgroundColor: 'rgba(99, 102, 241, 0.04)',
+                                backgroundColor: '#f3f6f8',
+                                flexDirection: 'column',
+                                gap: 6,
+                                transform: currentMedia.length > 0 ? 'none' : 'rotate(-7deg)',
+                                boxShadow: '0 8px 18px rgba(15, 23, 42, 0.06)',
                               }}
                               onMouseEnter={(e) => {
-                                e.currentTarget.style.borderColor = '#6366f1';
-                                e.currentTarget.style.backgroundColor = 'rgba(99, 102, 241, 0.08)';
+                                e.currentTarget.style.borderColor = '#d7e7f2';
+                                e.currentTarget.style.backgroundColor = '#eef7fb';
+                                e.currentTarget.style.transform = 'rotate(0deg) translateY(-1px)';
                               }}
                               onMouseLeave={(e) => {
-                                e.currentTarget.style.borderColor = 'rgba(99, 102, 241, 0.3)';
-                                e.currentTarget.style.backgroundColor = 'rgba(99, 102, 241, 0.04)';
+                                e.currentTarget.style.borderColor = '#eef1f5';
+                                e.currentTarget.style.backgroundColor = '#f3f6f8';
+                                e.currentTarget.style.transform = currentMedia.length > 0 ? 'none' : 'rotate(-7deg)';
                               }}
                             >
                               {uploading ? (
-                                <LoadingOutlined style={{ fontSize: 18, color: '#6366f1' }} />
+                                <LoadingOutlined style={{ fontSize: 17, color: '#94a3b8' }} />
                               ) : (
-                                <PlusOutlined style={{ fontSize: 18, color: '#6366f1' }} />
+                                <>
+                                  <PlusOutlined style={{ fontSize: 17, color: '#94a3b8' }} />
+                                  <span style={{ fontSize: 10, color: '#94a3b8', fontWeight: 600, lineHeight: 1.1, writingMode: 'vertical-rl', letterSpacing: 1 }}>参考内容</span>
+                                </>
                               )}
                             </div>
                           </Tooltip>
@@ -2142,21 +2150,21 @@ const AIChatPage: React.FC = () => {
                 )}
               </div>
 
-              {/* 右侧输入区域 - 80% */}
-              <div style={{ width: '80%', flex: 1 }}>
+              {/* 右侧输入区域 */}
+              <div style={{ flex: 1, minWidth: 0 }}>
                 {/* 输入框区域 */}
                 <div style={{
                   display: 'flex',
                   flexDirection: 'column',
                   gap: 10,
-                  padding: '16px 18px',
-                  backgroundColor: 'rgba(248,250,252,0.7)',
-                  borderRadius: 18,
-                  border: '1px solid rgba(99, 102, 241, 0.1)',
-                  boxShadow: '0 2px 12px rgba(99, 102, 241, 0.06)',
+                  padding: '2px 0 0',
+                  backgroundColor: 'transparent',
+                  borderRadius: 0,
+                  border: 'none',
+                  boxShadow: 'none',
                   transition: 'all 0.2s ease',
                   position: 'relative',
-                  minHeight: 120,
+                  minHeight: 82,
                 }}>
                   {/* 文本输入框 */}
                   <TextArea
@@ -2166,25 +2174,26 @@ const AIChatPage: React.FC = () => {
                     onKeyDown={handleInputKeyDown}
                     onKeyPress={handleKeyPress}
                     placeholder={mediaType === 'image'
-                      ? `上传参考图，输入提示词描述您想生成的画面...`
+                      ? '上传最多12个参考素材，输入文字或 @ 参考内容，自由组合图、文、音、视频多元素，定义精彩互动。例如：@图片1 参考风格生成海报。'
                       : referenceMode === 'first_last_frame'
-                        ? '上传首帧和尾帧，输入提示词描述您想生成的视频...'
-                        : `上传参考图和视频，输入提示词描述您想生成的画面...`
+                        ? '上传首帧和尾帧，输入文字描述镜头运动、主体动作和画面氛围。'
+                        : '上传最多12个参考素材，输入文字或 @ 参考内容，自由组合图、文、音、视频多元素，定义精彩互动。例如：@图片1 模仿 @视频1 的动作，音色参考 @音频1。'
                     }
                     autoSize={{ minRows: 3, maxRows: 6 }}
                     style={{
                       flex: 1,
                       width: '100%',
-                      borderRadius: 10,
+                      borderRadius: 0,
                       border: 'none',
                       outline: 'none',
                       boxShadow: 'none',
-                      fontSize: 15,
-                      lineHeight: 1.6,
+                      fontSize: 14,
+                      lineHeight: 1.55,
                       color: '#1e293b',
                       fontWeight: 400,
                       resize: 'none',
                       backgroundColor: 'transparent',
+                      padding: 0,
                     }}
                     disabled={loading}
                   />
@@ -2242,72 +2251,34 @@ const AIChatPage: React.FC = () => {
                       ))}
                     </div>
                   )}
-
-                  {/* 发送按钮 - 右下角 */}
-                  <div style={{ display: 'flex', justifyContent: 'flex-end' }}>
-                    <Button
-                      type="primary"
-                      shape="circle"
-                      icon={<ArrowUpOutlined />}
-                      onClick={handleSend}
-                      disabled={
-                        mediaType === 'video' && referenceMode === 'first_last_frame'
-                          ? !inputValue.trim() && !firstFrame
-                          : !inputValue.trim() && currentMedia.length === 0
-                      }
-                      loading={loading}
-                      style={{
-                        flexShrink: 0,
-                        width: 40,
-                        height: 40,
-                        borderRadius: 12,
-                        background: (
-                          mediaType === 'video' && referenceMode === 'first_last_frame'
-                            ? (inputValue.trim() || firstFrame)
-                            : (inputValue.trim() || currentMedia.length > 0)
-                        )
-                          ? 'linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%)'
-                          : '#c7cfdaff',
-                        boxShadow: (
-                          mediaType === 'video' && referenceMode === 'first_last_frame'
-                            ? (inputValue.trim() || firstFrame)
-                            : (inputValue.trim() || currentMedia.length > 0)
-                        )
-                          ? '0 4px 16px rgba(99, 102, 241, 0.4)'
-                          : 'none',
-                        transition: 'all 0.2s ease',
-                        border: 'none',
-                      }}
-                    />
-                  </div>
                 </div>
               </div>
             </div>
 
-            {/* 底部选择器 - 媒体类型和数量 */}
-            <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginTop: 14, paddingTop: 14, borderTop: '1px solid rgba(99, 102, 241, 0.1)' }}>
-              <Space size={10}>
+            {/* 底部工具栏 */}
+            <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', gap: 12, marginTop: 8, paddingTop: 10, borderTop: '1px solid #f1f5f9' }}>
+              <Space size={8} wrap style={{ flex: 1, minWidth: 0 }}>
                 {/* 文件类型选择器 */}
                 <Select
                   value={mediaType}
                   onChange={(val) => setMediaType(val)}
                   style={{
-                    width: 100,
-                    height: 36,
+                    width: 118,
+                    height: 32,
                     outline: 'none',
-                    border: 'none',
-                    backgroundColor: '#f1f5f9',
+                    border: '1px solid #e9eef5',
+                    backgroundColor: '#ffffff',
                     borderRadius: 10,
                   }}
                   size="middle"
                 >
                   <Option value="video">
                     <VideoCameraOutlined style={{ marginRight: 6, fontSize: 14, color: '#6366f1' }} />
-                    <span style={{ fontSize: 13, fontWeight: 500, color: '#6366f1' }}>视频</span>
+                    <span style={{ fontSize: 13, fontWeight: 600, color: '#0ea5e9' }}>视频生成</span>
                   </Option>
                   <Option value="image">
                     <PictureOutlined style={{ marginRight: 6, fontSize: 14, color: '#6366f1' }} />
-                    <span style={{ fontSize: 13, fontWeight: 500, color: '#6366f1' }}>图片</span>
+                    <span style={{ fontSize: 13, fontWeight: 600, color: '#0ea5e9' }}>图片生成</span>
                   </Option>
                 </Select>
 
@@ -2317,35 +2288,35 @@ const AIChatPage: React.FC = () => {
                     onClick={() => setShowEngineModal(true)}
                     className="image-settings-trigger"
                     style={{
-                      minWidth: 200,
-                      padding: '6px 14px',
-                      height: 36,
+                      minWidth: 174,
+                      padding: '5px 12px',
+                      height: 32,
                       borderRadius: 10,
-                      border: '1px solid rgba(99, 102, 241, 0.15)',
-                      backgroundColor: 'rgba(241, 245, 249, 0.8)',
+                      border: '1px solid #e9eef5',
+                      backgroundColor: '#ffffff',
                       cursor: 'pointer',
                       display: 'inline-flex',
                       alignItems: 'center',
                       gap: 6,
                       transition: 'all 0.2s ease',
-                      boxShadow: '0 1px 3px rgba(99, 102, 241, 0.04)',
+                      boxShadow: '0 1px 2px rgba(15, 23, 42, 0.03)',
                     }}
                     onMouseEnter={(e) => {
-                      e.currentTarget.style.backgroundColor = 'rgba(99, 102, 241, 0.08)';
-                      e.currentTarget.style.borderColor = 'rgba(99, 102, 241, 0.3)';
-                      e.currentTarget.style.boxShadow = '0 2px 8px rgba(99, 102, 241, 0.1)';
+                      e.currentTarget.style.backgroundColor = '#f8fafc';
+                      e.currentTarget.style.borderColor = '#d7e7f2';
+                      e.currentTarget.style.boxShadow = '0 2px 8px rgba(15, 23, 42, 0.06)';
                     }}
                     onMouseLeave={(e) => {
-                      e.currentTarget.style.backgroundColor = 'rgba(241, 245, 249, 0.8)';
-                      e.currentTarget.style.borderColor = 'rgba(99, 102, 241, 0.15)';
-                      e.currentTarget.style.boxShadow = '0 1px 3px rgba(99, 102, 241, 0.04)';
+                      e.currentTarget.style.backgroundColor = '#ffffff';
+                      e.currentTarget.style.borderColor = '#e9eef5';
+                      e.currentTarget.style.boxShadow = '0 1px 2px rgba(15, 23, 42, 0.03)';
                     }}
                   >
                     <SettingOutlined style={{ fontSize: 14, color: '#6366f1' }} />
                     <Text style={{
                       fontSize: 13,
                       fontWeight: 500,
-                      color: '#6366f1',
+                      color: '#334155',
                     }}>
                       {mediaType === 'image' ? enginesele.image?.find((e: any) => e.id === countType)?.name : enginesele.video?.find((e: any) => e.id === countType)?.name || '选择引擎'}
                     </Text>
@@ -2459,7 +2430,7 @@ const AIChatPage: React.FC = () => {
                       onClick={() => setReferenceModeDropdownVisible(!referenceModeDropdownVisible)}
                       className="image-settings-trigger"
                       style={{
-                        minWidth: 120,
+                        minWidth: 118,
                         padding: '6px 14px',
                         height: 36,
                         borderRadius: 10,
@@ -2470,7 +2441,7 @@ const AIChatPage: React.FC = () => {
                         alignItems: 'center',
                         gap: 6,
                         transition: 'all 0.2s ease',
-                        boxShadow: '0 1px 3px rgba(99, 102, 241, 0.04)',
+                        boxShadow: '0 1px 2px rgba(15, 23, 42, 0.03)',
                       }}
                       onMouseEnter={(e) => {
                         e.currentTarget.style.backgroundColor = 'rgba(99, 102, 241, 0.08)';
@@ -2487,7 +2458,7 @@ const AIChatPage: React.FC = () => {
                       <Text style={{
                         fontSize: 13,
                         fontWeight: 500,
-                        color: '#6366f1',
+                        color: '#334155',
                       }}>
                         {referenceMode === 'universal' ? '全能参考' : '首尾帧'}
                       </Text>
@@ -2627,7 +2598,7 @@ const AIChatPage: React.FC = () => {
                       onClick={() => setShowImageSettingsModal(!showImageSettingsModal)}
                       className="image-settings-trigger"
                       style={{
-                        minWidth: 220,
+                        minWidth: 156,
                         padding: '6px 14px',
                         height: 36,
                         borderRadius: 10,
@@ -2638,7 +2609,7 @@ const AIChatPage: React.FC = () => {
                         alignItems: 'center',
                         gap: 6,
                         transition: 'all 0.2s ease',
-                        boxShadow: '0 1px 3px rgba(99, 102, 241, 0.04)',
+                        boxShadow: '0 1px 2px rgba(15, 23, 42, 0.03)',
                       }}
                       onMouseEnter={(e) => {
                         e.currentTarget.style.backgroundColor = 'rgba(99, 102, 241, 0.08)';
@@ -2655,7 +2626,7 @@ const AIChatPage: React.FC = () => {
                       <Text style={{
                         fontSize: 13,
                         fontWeight: 500,
-                        color: '#6366f1',
+                        color: '#334155',
                       }}>
                         {selectedRatio === 'auto' ? '智能' : selectedRatio} · {selectedResolution == '2K' ? '2K高清' : '4K超清'} · {width}×{height}
                       </Text>
@@ -2931,7 +2902,7 @@ const AIChatPage: React.FC = () => {
                       onClick={() => setShowVideoSettingsModal(!showVideoSettingsModal)}
                       className="image-settings-trigger"
                       style={{
-                        minWidth: 220,
+                        minWidth: 156,
                         padding: '6px 14px',
                         height: 36,
                         borderRadius: 10,
@@ -2942,7 +2913,7 @@ const AIChatPage: React.FC = () => {
                         alignItems: 'center',
                         gap: 6,
                         transition: 'all 0.2s ease',
-                        boxShadow: '0 1px 3px rgba(99, 102, 241, 0.04)',
+                        boxShadow: '0 1px 2px rgba(15, 23, 42, 0.03)',
                       }}
                       onMouseEnter={(e) => {
                         e.currentTarget.style.backgroundColor = 'rgba(99, 102, 241, 0.08)';
@@ -2955,15 +2926,13 @@ const AIChatPage: React.FC = () => {
                         e.currentTarget.style.boxShadow = '0 1px 3px rgba(99, 102, 241, 0.04)';
                       }}
                     >
-                      <LayoutOutlined style={{ fontSize: 14, color: '#6366f1' }} />
-                      <Text style={{
-                        fontSize: 13,
-                        fontWeight: 500,
-                        color: '#6366f1',
-                      }}>
-                        {videoAspectRatio} · {videoDuration}s · {videoResolution}
-                      </Text>
-                      <CaretDownOutlined style={{ fontSize: 10, color: '#6366f1', marginLeft: 'auto' }} />
+                      <LayoutOutlined style={{ fontSize: 14, color: '#334155' }} />
+                      <span style={{ fontSize: 13, fontWeight: 600, color: '#334155' }}>{videoAspectRatio}</span>
+                      <span style={{ width: 1, height: 14, background: '#e5e7eb' }} />
+                      <span style={{ fontSize: 13, fontWeight: 600, color: '#334155' }}>{videoResolution?.toUpperCase?.() || videoResolution}</span>
+                      <span style={{ width: 1, height: 14, background: '#e5e7eb' }} />
+                      <span style={{ fontSize: 13, fontWeight: 600, color: '#334155' }}>{videoDuration}s</span>
+                      <CaretDownOutlined style={{ fontSize: 10, color: '#64748b', marginLeft: 'auto' }} />
                     </button>
 
                     {showVideoSettingsModal && (
@@ -3176,13 +3145,68 @@ const AIChatPage: React.FC = () => {
                     )}
                   </div>
                 )}
-                {/* 预估积分 */}
-                <div style={{ display: 'flex', alignItems: 'center', gap: 6, padding: '6px 14px', backgroundColor: 'rgba(99, 102, 241, 0.06)', borderRadius: 10, border: '1px solid rgba(99, 102, 241, 0.1)' }}>
-                  <Text style={{ fontSize: 13, color: '#6366f1', fontWeight: 500 }}>预估积分</Text>
-                  <Text style={{ fontSize: 14, color: '#6366f1', fontWeight: 600 }}>{getEstimatedCredits()}</Text>
-                </div>
+                <button
+                  type="button"
+                  onClick={() => {
+                    setInputValue(`${inputValue}@`);
+                    setMentionVisible(currentMedia.length > 0 && referenceMode === 'universal');
+                    setTimeout(() => mentionInputRef.current?.focus?.(), 0);
+                  }}
+                  style={{
+                    width: 32,
+                    height: 32,
+                    borderRadius: 10,
+                    border: '1px solid #e9eef5',
+                    background: '#ffffff',
+                    color: '#334155',
+                    fontSize: 16,
+                    fontWeight: 700,
+                    cursor: 'pointer',
+                    display: 'inline-flex',
+                    alignItems: 'center',
+                    justifyContent: 'center',
+                    boxShadow: '0 1px 2px rgba(15, 23, 42, 0.03)',
+                  }}
+                >
+                  @
+                </button>
               </Space>
 
+              <div style={{ display: 'flex', alignItems: 'center', gap: 12, flexShrink: 0 }}>
+                <div style={{ display: 'flex', alignItems: 'center', gap: 6, color: '#64748b' }}>
+                  <span style={{ fontSize: 15, lineHeight: 1, color: '#475569' }}>✦</span>
+                  <Text style={{ fontSize: 13, color: '#64748b', fontWeight: 600 }}>{getEstimatedCredits()}</Text>
+                </div>
+                <Button
+                  type="primary"
+                  shape="circle"
+                  icon={<ArrowUpOutlined />}
+                  onClick={handleSend}
+                  disabled={
+                    mediaType === 'video' && referenceMode === 'first_last_frame'
+                      ? !inputValue.trim() && !firstFrame
+                      : !inputValue.trim() && currentMedia.length === 0
+                  }
+                  loading={loading}
+                  style={{
+                    flexShrink: 0,
+                    width: 36,
+                    height: 36,
+                    borderRadius: '50%',
+                    background: (
+                      mediaType === 'video' && referenceMode === 'first_last_frame'
+                        ? (inputValue.trim() || firstFrame)
+                        : (inputValue.trim() || currentMedia.length > 0)
+                    )
+                      ? '#cbd5e1'
+                      : '#d9dee6',
+                    color: '#ffffff',
+                    boxShadow: 'none',
+                    transition: 'all 0.2s ease',
+                    border: 'none',
+                  }}
+                />
+              </div>
             </div>
           </div>
         </Content>
@@ -3194,6 +3218,12 @@ const AIChatPage: React.FC = () => {
           0%, 50% { opacity: 1; }
           51%, 100% { opacity: 0.3; }
         }
+        textarea::placeholder {
+          color: #9aa7b2 !important;
+        }
+        .ant-select-selector {
+          border-radius: 10px !important;
+        }
       `}</style>
 
       {/* 图片/视频预览弹窗 */}