diff --git a/src/components/chat/ChatInput.tsx b/src/components/chat/ChatInput.tsx
index 3cb307b..4d2b3e4 100644
--- a/src/components/chat/ChatInput.tsx
+++ b/src/components/chat/ChatInput.tsx
@@ -248,7 +248,7 @@ export function ChatInput(): React.JSX.Element {
           onPaste={handlePaste}
           placeholder="输入消息... (Enter 发送, Ctrl+Enter 换行, / 命令)" disabled={isStreaming}
           rows={1}
-          style={{ width: '100%', background: 'transparent', border: 'none', outline: 'none', color: 'inherit', fontSize: 14, lineHeight: '28px', resize: 'none', fontFamily: 'inherit', minHeight: 36, maxHeight: 160 }}
+          style={{ width: '100%', background: 'transparent', border: 'none', outline: 'none', color: 'inherit', fontSize: 14, lineHeight: '28px', resize: 'none', fontFamily: 'inherit', minHeight: 42, maxHeight: 160 }}
         />
 
         <Stack direction="row" justifyContent="space-between" alignItems="center" sx={{ mt: 1, minHeight: 32 }}>
diff --git a/src/components/chat/MessageList.tsx b/src/components/chat/MessageList.tsx
index 1c6c3a0..3a9b64b 100644
--- a/src/components/chat/MessageList.tsx
+++ b/src/components/chat/MessageList.tsx
@@ -20,10 +20,10 @@ export function MessageList(): React.JSX.Element {
     return (
       <Box sx={{ flex: 1, display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
         <Box sx={{ textAlign: 'center', animation: 'fadeIn 200ms ease-out' }}>
-          <Box component="img" src="./assets/logo.png" alt="Metona" sx={{ width: 64, height: 64, mx: 'auto', mb: 2, borderRadius: 2 }} />
-          <Typography variant="h6" sx={{ color: 'text.primary', mb: 0.5 }}>MetonaAI Desktop</Typography>
-          <Typography variant="body2" sx={{ color: 'text.secondary' }}>生产级通用 AI Agent 智能体桌面应用</Typography>
-          <Typography variant="caption" sx={{ mt: 2, display: 'block', opacity: 0.6 }}>Agent 就绪 · 选择一个 Provider 开始对话</Typography>
+          <Box component="img" src="./assets/logo.png" alt="Metona" sx={{ width: 80, height: 80, mx: 'auto', mb: 2.5, borderRadius: 2 }} />
+          <Typography variant="h5" sx={{ color: 'text.primary', mb: 0.5, fontWeight: 700 }}>MetonaAI Desktop</Typography>
+          <Typography variant="body1" sx={{ color: 'text.secondary' }}>生产级通用 AI Agent 智能体桌面应用</Typography>
+          <Typography variant="body2" sx={{ mt: 2, display: 'block', opacity: 0.6 }}>Agent 就绪 · 选择一个 Provider 开始对话</Typography>
         </Box>
       </Box>
     );
diff --git a/src/styles/globals.css b/src/styles/globals.css
index 4c05b07..9a90305 100644
--- a/src/styles/globals.css
+++ b/src/styles/globals.css
@@ -1,4 +1,5 @@
 @import "tailwindcss";
+@import "highlight.js/styles/atom-one-dark.css";
 
 /* ===== MetonaAI Desktop — 全局样式 ===== */