diff --git a/src/hooks/use-preset-button.hooks.ts b/src/hooks/use-preset-button.hooks.ts
index 9d21f8d..b563dff 100644
--- a/src/hooks/use-preset-button.hooks.ts
+++ b/src/hooks/use-preset-button.hooks.ts
@@ -8,7 +8,8 @@ const usePresetButton = () => {
 
   const handleReferenceButtonClick = (references: referenceState[]) => {
     let content = '답변 출처를 알려드릴게요!\n';
-    if (references === undefined || references.length === 0) {
+    // references가 null, undefined, 또는 길이가 0인 경우 체크
+    if (!references || references.length === 0) {
       addMessage({ content: '출처 정보가 없습니다.', role: 'system' });
       return;
     }
diff --git a/src/ui/components/atom/chat-card/chat-card.tsx b/src/ui/components/atom/chat-card/chat-card.tsx
index bcf4079..a709941 100644
--- a/src/ui/components/atom/chat-card/chat-card.tsx
+++ b/src/ui/components/atom/chat-card/chat-card.tsx
@@ -21,10 +21,10 @@ const ChatCard = ({ content, role }: ChatCardProps) => {
         <div
           className={cn('flex w-auto rounded-md bg-white px-5 py-3 text-black', {
             'justify-end bg-primary-blue text-white': role === 'user',
-            'justify-start text-left': role !== 'user',
+            'max-w-full justify-start text-left mobile:max-w-full desktop:max-w-[2/3]': role !== 'user', // 모바일에서는 w-auto,
           })}
         >
-          <div className="font-pretendard text-sm font-normal">
+          <div className="text-md font-pretendard font-normal">
             {content === 'loading' ? <Loader /> : <ReactMarkdown remarkPlugins={[remarkGfm]}>{content}</ReactMarkdown>}
           </div>
         </div>
diff --git a/src/ui/components/atom/preset/preset-button.tsx b/src/ui/components/atom/preset/preset-button.tsx
index 884cbb2..e085fb5 100644
--- a/src/ui/components/atom/preset/preset-button.tsx
+++ b/src/ui/components/atom/preset/preset-button.tsx
@@ -10,9 +10,13 @@ interface PresetButtonProps {
 
 const PresetButton = ({ onClick, isSelected, disabled, children }: PresetButtonProps) => {
   const buttonClasses = cn(
-    'cursor-pointer rounded-full border border-gray text-black bg-white px-4 py-2 ',
-    isSelected ? 'bg-primary-blue text-white border-primary-blue' : 'bg-white text-black',
-    disabled ? 'bg-border-gray cursor-not-allowed text-border-gray bg-text-white' : '',
+    'cursor-pointer text-base rounded-full border border-gray text-black bg-white px-4 py-2 transition-colors duration-200',
+    isSelected
+      ? 'bg-primary-blue text-white border-gray'
+      : 'bg-white text-black hover:bg-primary-blue hover:text-white',
+    disabled
+      ? 'bg-border-gray cursor-not-allowed text-border-gray bg-text-white hover:text-border-gray hover:bg-text-white'
+      : '',
   );
 
   return (
diff --git a/src/ui/components/molecule/chat-section/chat-section.tsx b/src/ui/components/molecule/chat-section/chat-section.tsx
index fa6c4bd..6bb90a8 100644
--- a/src/ui/components/molecule/chat-section/chat-section.tsx
+++ b/src/ui/components/molecule/chat-section/chat-section.tsx
@@ -38,19 +38,19 @@ const ChatSection: React.FC = () => {
   const showCategoryStatus = () => {
     let contentMessage = '';
     if (!activeSusi && !activeJeongsi && !activePyeonip) {
-      contentMessage = '현재 모든 카테고리 이용이 가능합니다.';
+      contentMessage = '현재는 모든 카테고리 이용이 가능해요.';
     } else if (!activeSusi && activeJeongsi && activePyeonip) {
-      contentMessage = '현재 수시 카테고리만 이용 가능합니다.';
+      contentMessage = '현재는 수시 카테고리만 이용 가능해요.';
     } else if (activeSusi && !activeJeongsi && activePyeonip) {
-      contentMessage = '현재 정시 카테고리만 이용 가능합니다.';
+      contentMessage = '현재는 정시 카테고리만 이용 가능해요.';
     } else if (activeSusi && activeJeongsi && !activePyeonip) {
-      contentMessage = '현재 편입 카테고리만 이용 가능합니다.';
+      contentMessage = '현재는 편입 카테고리만 이용 가능해요.';
     } else if (!activeSusi && !activeJeongsi && activePyeonip) {
-      contentMessage = '현재 수시, 정시 카테고리만 이용 가능합니다.';
+      contentMessage = '현재는 수시, 정시 카테고리만 이용 가능해요.';
     } else if (!activeSusi && activeJeongsi && !activePyeonip) {
-      contentMessage = '현재 수시, 편입 카테고리만 이용 가능합니다.';
+      contentMessage = '현재는 수시, 편입 카테고리만 이용 가능해요';
     } else if (activeSusi && !activeJeongsi && !activePyeonip) {
-      contentMessage = '현재 정시, 편입 카테고리만 이용 가능합니다.';
+      contentMessage = '현재는 정시, 편입 카테고리만 이용 가능해요.';
     }
 
     if (contentMessage) {
@@ -101,16 +101,24 @@ const ChatSection: React.FC = () => {
     <div className="max-h-100vh w-full overflow-y-auto px-4 pb-24 pt-16">
       {contextHolder}
       <ChatCard
-        content={`안녕하세요 입학처 챗봇 MARU-EGG입니다!  
-        궁금하신 내용 안내 도와드리겠습니다.  
-        알아보고 싶은 전형을 선택해주세요!`}
+        content={`안녕하세요.       
+        명지대학교 입학 AI챗봇 마루에그입니다!           
+        문의사항은 아래 전형 중 하나를 선택해주시면            
+        안내 도와드릴게요!`}
         role="system"
       />
       <TypePresetButtons />
       {type && <ChatCard role="user" content={type === 'SUSI' ? '수시' : type === 'JEONGSI' ? '정시' : '편입'} />}
       {type && (
         <>
-          <ChatCard content="알고싶은 내용을 선택해주세요" role="system" />
+          <ChatCard
+            content={`${
+              type === 'SUSI' ? '수시' : type === 'JEONGSI' ? '정시' : '편입'
+            }와 관련하여 궁금하신 점이 있으신가요?        
+            아래에서 관련 버튼을 선택하여        
+            자세한 내용을 확인해주세요!`}
+            role="system"
+          />
           <CategoryPresetButtons />
         </>
       )}
@@ -127,7 +135,18 @@ const ChatSection: React.FC = () => {
         />
       )}
       {type && category && (
-        <ChatCard role="system" content="안녕하세요 입학처 챗봇 MARU-EGG입니다! 궁금하신 내용 안내 도와드리겠습니다." />
+        <ChatCard
+          role="system"
+          content={`${type === 'SUSI' ? '수시' : type === 'JEONGSI' ? '정시' : '편입'}에서 ${
+            category === 'PASSING_RESULT'
+              ? '전년도 입시결과'
+              : category === 'ADMISSION_GUIDELINE'
+                ? '모집 관련'
+                : '기출문제'
+          }을(를) 선택하셨네요!                 
+          아래 버튼을 선택하여 더 자세한 내용을 알아보거나     
+          직접 질문해보세요!`}
+        />
       )}
       {messages.map((msg, index) => (
         <ChatCard key={index} content={msg.content} role={msg.role} />
diff --git a/src/ui/components/molecule/menu-drawer/menu-drawer.tsx b/src/ui/components/molecule/menu-drawer/menu-drawer.tsx
index c823ae0..26c0703 100644
--- a/src/ui/components/molecule/menu-drawer/menu-drawer.tsx
+++ b/src/ui/components/molecule/menu-drawer/menu-drawer.tsx
@@ -57,7 +57,7 @@ const MenuDrawer = ({ open, onClose }: MenuDrawerProps) => {
       closable={false}
       open={open}
       onClose={onClose}
-      height="260px"
+      height="300px"
       rootClassName="absolute mx-auto my-auto desktop:max-w-[390px] desktop:max-h-[780px] desktop:rounded-t-3xl desktop:rounded-b-3xl mobile:max-w-full mobile:max-h-full mobile:rounded-none mobile:shadow-none"
       rootStyle={{ width: '100%', overflow: 'hidden' }}
     >
@@ -81,19 +81,19 @@ const MenuDrawer = ({ open, onClose }: MenuDrawerProps) => {
       </div>
       <div
         onClick={() => window.open(FAQUrl, '_blank', 'noopener, noreferrer')}
-        className="w-full cursor-pointer p-2 text-start font-pretendard text-sm hover:rounded-lg hover:bg-[#F4F4F4]"
+        className="w-full cursor-pointer p-2 text-start font-pretendard text-base hover:rounded-lg hover:bg-[#F4F4F4]"
       >
         {selectedButton === 'PYEONIP' ? '편입' : selectedButton === 'JEONGSI' ? '정시' : '수시'} FAQ 바로가기
       </div>
       <div
         onClick={() => window.open(admissionResultsUrl, '_blank', 'noopener, noreferrer')}
-        className="w-full cursor-pointer p-2 text-start font-pretendard text-sm hover:rounded-lg hover:bg-[#F4F4F4]"
+        className="w-full cursor-pointer p-2 text-start font-pretendard text-base hover:rounded-lg hover:bg-[#F4F4F4]"
       >
         {selectedButton === 'PYEONIP' ? '편입' : selectedButton === 'JEONGSI' ? '정시' : '수시'} 입시결과 바로가기
       </div>
       <div
         onClick={() => window.open(admissionGuideUrl, '_blank', 'noopener, noreferrer')}
-        className="w-full cursor-pointer p-2 text-start font-pretendard text-sm hover:rounded-lg hover:bg-[#F4F4F4]"
+        className="w-full cursor-pointer p-2 text-start font-pretendard text-base hover:rounded-lg hover:bg-[#F4F4F4]"
       >
         {selectedButton === 'PYEONIP' ? '편입' : selectedButton === 'JEONGSI' ? '정시' : '수시'} 모집요강 바로가기
       </div>
diff --git a/src/ui/components/user-domain/question-preset-buttons.tsx b/src/ui/components/user-domain/question-preset-buttons.tsx
index bc165ab..0f45abc 100644
--- a/src/ui/components/user-domain/question-preset-buttons.tsx
+++ b/src/ui/components/user-domain/question-preset-buttons.tsx
@@ -8,7 +8,7 @@ export const QuestionPresetButtons = () => {
   const { handleReferenceButtonClick, handleButtonClick } = usePresetButton();
 
   return (
-    <div>
+    <div className="grid w-full grid-cols-1 gap-2 mobile:w-2/3 mobile:grid-cols-1 desktop:grid desktop:w-full desktop:grid-cols-2 desktop:gap-2">
       {!referenceButtonDisabled && (
         <PresetButton onClick={() => handleReferenceButtonClick(lastReference)}>👆 출처를 알고싶어요</PresetButton>
       )}