/* Home Page Specific Styles */

/* 홈페이지는 hero-section이 최상단부터 시작하므로 main의 padding 제거 */
main {
  padding-top: 0 !important;
}

/* BebasNeue Font */
@font-face {
  font-family: 'Bebas Neue';
  src: url('../fonts/BebasNeue-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* Hero Section - Enhanced Responsive */
.hero-section {
  position: relative;
  /* ?�면 비율???�라 ?�적?�로 ?�이 조정 */
  height: 100vh;
  min-height: clamp(500px, 100vh, 1200px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0 2rem;
  overflow: hidden;
  /* 비디오 종료 후 배경 이미지 */
  background-image: url('../assets/sector banner/home overlay.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 1;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
  transition: opacity 1s ease;
}

/* 비디오 로딩 인디케이터 */
.video-loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 1;
  transition: opacity 0.5s ease;
}

.video-loading-indicator.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  color: white;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  margin: 0;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  z-index: 1;
  /* 성능 최적화 */
  will-change: transform;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  /* Poster 이미지 스타일링 */
  background-color: #000000;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

/* 데스크톱 - 가로 화면 (일반 PC, 태블릿 가로) */
@media (min-width: 769px) {
  .hero-video {
    /* 좌우 폭 기준으로 비율 조정, 상하 여백 허용 */
    width: 100%;
    height: auto;
    min-height: 100%;
    object-fit: contain; /* 영상 비율 유지하며 좌우 폭에 맞춤 */
    object-position: center center;
  }
}

/* 모바일 - 세로 화면 (768px 이하) */
@media (max-width: 768px) {
  .hero-video {
    /* 레터박스 없이 화면 꽉 채우기 - 영상 비율 유지하며 잘림 */
    object-fit: cover;
    object-position: center center;
    width: 100%;
    height: 100%;
  }
  
  .hero-section {
    min-height: 100vh; /* 모바일에서 전체 화면 */
    /* 화면 최상단부터 시작 */
    position: relative;
    z-index: 1; /* 헤더(z-index: 9999)보다 아래 */
  }
  
  .hero-background {
    /* 배경이 화면 최상단부터 */
    top: 0;
    height: 100%;
  }
  
  .hero-overlay {
    /* 오버레이가 뷰포트 높이에 반응 */
    top: 0;
    height: 100vh; /* 창 세로 길이에 반응 */
  }
  
  /* 헤더가 영상 위에 떠있도록 설정 */
  header.transparent-header {
    position: fixed;
    z-index: 9999; /* 영상보다 위에 표시 */
  }
}

/* 매우 작은 모바일 (480px 이하) */
@media (max-width: 480px) {
  .hero-video {
    /* 레터박스 없이 화면 꽉 채우기 */
    object-fit: cover;
    object-position: center center;
    width: 100%;
    height: 100%;
  }
}

/* 모바일 가로 모드 */
@media (max-width: 768px) and (orientation: landscape) {
  .hero-video {
    /* 가로 모드에서는 너비 기준으로 꽉 채우기 */
    object-fit: cover;
    object-position: center center;
    width: 100%;
    height: auto;
    min-height: 100%;
  }
  
  .hero-section {
    min-height: 100vh;
  }
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* 비디오 위 약간의 어두운 오버레이 */
  background: rgba(0, 0, 0, 0.2);
  z-index: 2;
  transition: opacity 1s ease;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: white;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
  /* 초기 상태: 완전히 숨김 (JavaScript로 제어) */
  opacity: 0;
  visibility: hidden;
  transform: translateY(30px);
}

.hero-logo {
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease-out;
}

.hero-logo img {
  height: 80px;
  width: auto;
  filter: brightness(1.1) drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.hero-title {
  font-size: 4rem;
  font-weight: 300;
  margin-bottom: 1.5rem;
  line-height: 1.2;
  animation: fadeInUp 1s ease-out 0.2s both;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  /* 강한 텍스트 아웃라인과 그림자로 가독성 향상 */
  text-shadow: 
    -1px -1px 0 #000,
    1px -1px 0 #000,
    -1px 1px 0 #000,
    1px 1px 0 #000,
    0 2px 4px rgba(0, 0, 0, 0.8),
    0 4px 12px rgba(0, 0, 0, 0.6),
    0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Apply Bebas Neue to hero English text */
.hero-title .lang-en {
  font-family: 'Bebas Neue', sans-serif;
  font-weight: 400;
  letter-spacing: 2px;
}

.hero-title strong {
  font-weight: 700;
  color: #ffffff;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  /* strong 태그에도 동일한 텍스트 효과 적용 */
  text-shadow: 
    -1px -1px 0 #000,
    1px -1px 0 #000,
    -1px 1px 0 #000,
    1px 1px 0 #000,
    0 2px 4px rgba(0, 0, 0, 0.8),
    0 4px 12px rgba(0, 0, 0, 0.6),
    0 8px 24px rgba(0, 0, 0, 0.4);
}

.hero-title .lang-en strong {
  font-family: 'Bebas Neue', sans-serif;
  font-weight: 400;
  letter-spacing: 3px;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  opacity: 0.9;
  animation: fadeInUp 1s ease-out 0.4s both;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
}

.hero-subtitle .lang-en {
  font-family: 'Bebas Neue', sans-serif;
  font-weight: 400;
  letter-spacing: 1.5px;
}

.hero-description {
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  opacity: 1;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease-out 0.6s both;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  /* 강한 텍스트 아웃라인과 그림자 */
  text-shadow: 
    -1px -1px 0 #000,
    1px -1px 0 #000,
    -1px 1px 0 #000,
    1px 1px 0 #000,
    0 2px 6px rgba(0, 0, 0, 0.8),
    0 4px 16px rgba(0, 0, 0, 0.5);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.8s both;
  margin-bottom: 4rem;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border: none;
  border-radius: 0;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.hero-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.4), 
    transparent
  );
  transition: left 0.5s ease;
}

.hero-btn:hover::before {
  left: 100%;
}

.hero-btn.primary {
  /* Liquid Glass - Primary */
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 
    0 8px 32px 0 rgba(31, 38, 135, 0.2),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.4),
    0 2px 8px 0 rgba(255, 255, 255, 0.2);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-btn.primary:hover {
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(25px) saturate(200%);
  -webkit-backdrop-filter: blur(25px) saturate(200%);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 
    0 16px 48px 0 rgba(31, 38, 135, 0.3),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.5),
    0 4px 12px 0 rgba(255, 255, 255, 0.3);
}

.hero-btn.secondary {
  /* Liquid Glass - Secondary */
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 
    0 8px 32px 0 rgba(31, 38, 135, 0.15),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.3),
    0 1px 4px 0 rgba(255, 255, 255, 0.15);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px) saturate(200%);
  -webkit-backdrop-filter: blur(25px) saturate(200%);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 
    0 16px 48px 0 rgba(31, 38, 135, 0.25),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.4),
    0 4px 12px 0 rgba(255, 255, 255, 0.25);
}

.hero-btn.tertiary {
  /* Liquid Glass - Mercedes Petronas F1 */
  background: linear-gradient(135deg, 
    rgba(0, 210, 190, 0.9) 0%, 
    rgba(0, 170, 170, 0.9) 50%,
    rgba(0, 130, 150, 0.9) 100%
  );
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 
    0 8px 32px 0 rgba(0, 210, 190, 0.4),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.3),
    0 4px 12px 0 rgba(0, 210, 190, 0.3);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-btn.tertiary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, 
    rgba(255, 255, 255, 0.3) 0%, 
    transparent 70%
  );
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-btn.tertiary:hover {
  background: linear-gradient(135deg, 
    rgba(0, 230, 210, 0.95) 0%, 
    rgba(0, 190, 190, 0.95) 50%,
    rgba(0, 150, 170, 0.95) 100%
  );
  backdrop-filter: blur(25px) saturate(200%);
  -webkit-backdrop-filter: blur(25px) saturate(200%);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 
    0 16px 48px 0 rgba(0, 210, 190, 0.5),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.4),
    0 6px 16px 0 rgba(0, 210, 190, 0.4),
    0 0 40px rgba(0, 210, 190, 0.3);
}

/* Hero Impact Showcase */
.hero-impact-showcase {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  animation: fadeInUp 1s ease-out 0.8s both;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-impact-card {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 0;
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 
    0 8px 32px 0 rgba(0, 0, 0, 0.5),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.2),
    0 4px 16px 0 rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
  /* Link styles */
  text-decoration: none;
  color: inherit;
  display: block;
  cursor: pointer;
}

.hero-impact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.2), 
    transparent
  );
  transition: left 0.6s ease;
}

.hero-impact-card:hover::before {
  left: 100%;
}

.hero-impact-card:hover {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(25px) saturate(200%);
  -webkit-backdrop-filter: blur(25px) saturate(200%);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-8px) scale(1.05);
  box-shadow: 
    0 16px 48px 0 rgba(0, 0, 0, 0.6),
    inset 0 1px 2px 0 rgba(255, 255, 255, 0.3),
    0 4px 16px 0 rgba(255, 255, 255, 0.15);
}

.hero-impact-card:active {
  transform: translateY(-6px) scale(1.02);
  transition: all 0.1s ease;
}

.hero-metric-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.hero-metric-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: white;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-metric-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.hero-metric-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: white;
  font-family: 'Bebas Neue', sans-serif;
  letter-spacing: 1px;
  line-height: 1;
  /* 강한 텍스트 아웃라인과 그림자 */
  text-shadow: 
    -1px -1px 0 #000,
    1px -1px 0 #000,
    -1px 1px 0 #000,
    1px 1px 0 #000,
    0 2px 6px rgba(0, 0, 0, 0.8),
    0 4px 12px rgba(0, 0, 0, 0.6);
}

.hero-metric-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 1);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  /* 강한 텍스트 아웃라인과 그림자 */
  text-shadow: 
    -1px -1px 0 #000,
    1px -1px 0 #000,
    -1px 1px 0 #000,
    1px 1px 0 #000,
    0 2px 4px rgba(0, 0, 0, 0.8);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  z-index: 1;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  margin-top: 0.5rem;
}

.scroll-arrow svg {
  width: 24px;
  height: 24px;
  animation: bounceArrow 2s infinite;
}

/* Overview Section */
.overview-section {
  padding: 6rem 2rem;
  background: #f8f9fa;
}

.overview-container {
  max-width: 1200px;
  margin: 0 auto;
}

.overview-header {
  text-align: center;
  margin-bottom: 4rem;
}

.overview-header h2 {
  font-size: 2.5rem;
  color: #1a237e;
  margin-bottom: 1rem;
  font-weight: 700;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.overview-header p {
  font-size: 1.2rem;
  color: #666;
  max-width: 600px;
  margin: 0 auto;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.overview-card {
  background: white;
  border-radius: 0;
  padding: 2.5rem;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  border: 1px solid #e0e0e0;
}

.overview-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.5rem;
  padding: 1rem;
  background: linear-gradient(135deg, #1a237e, #3f51b5);
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon svg {
  width: 32px;
  height: 32px;
  stroke: white;
}

.overview-card h3 {
  font-size: 1.5rem;
  color: #1a237e;
  margin-bottom: 1rem;
  font-weight: 600;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.overview-card p {
  color: #666;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 300;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #1a237e;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.card-link:hover {
  color: #3f51b5;
  transform: translateX(5px);
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.card-link:hover svg {
  transform: translateX(3px);
}

/* Highlights Section */
.highlights-section {
  padding: 6rem 2rem;
  background: white;
}

.highlights-container {
  max-width: 1200px;
  margin: 0 auto;
}

.highlights-header {
  text-align: center;
  margin-bottom: 4rem;
}

.highlights-header h2 {
  font-size: 2.5rem;
  color: #1a237e;
  margin-bottom: 1rem;
  font-weight: 700;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.highlight-card {
  background: white;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  border: 1px solid #e0e0e0;
}

.highlight-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.highlight-card.featured {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
}

.highlight-card.featured .highlight-content {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
}

.highlight-card.featured .highlight-badge {
  background: linear-gradient(45deg, #1a237e, #3f51b5);
  color: white;
  align-self: flex-start;
}

.highlight-card.featured h3 {
  color: #1a237e;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  line-height: 1.3;
}

.highlight-card.featured p {
  color: #666;
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.highlight-card.featured .highlight-link {
  color: #1a237e;
  font-size: 1.1rem;
  align-self: flex-start;
}

.highlight-card.featured .highlight-link:hover {
  color: #3f51b5;
}

.highlight-content {
  padding: 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.highlight-content.small {
  padding: 1.5rem;
}

.highlight-badge {
  display: inline-block;
  background: linear-gradient(45deg, #1a237e, #3f51b5);
  color: white;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 0;
  margin-bottom: 1rem;
}

.highlight-content h3 {
  font-size: 1.3rem;
  color: #1a237e;
  margin-bottom: 1rem;
  font-weight: 600;
  line-height: 1.3;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.highlight-content h4 {
  font-size: 1.1rem;
  color: #1a237e;
  margin-bottom: 0.8rem;
  font-weight: 600;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.highlight-content p {
  color: #666;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 300;
}

.highlight-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #1a237e;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  margin-top: auto;
}

.highlight-link:hover {
  color: #3f51b5;
  transform: translateX(3px);
}

.highlight-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.highlight-link:hover svg {
  transform: translateX(2px);
}

/* Contact Modal Styles */
.contact-modal .modal-content {
  max-width: clamp(320px, 90vw, 900px);
  width: clamp(320px, 90vw, 900px);
  margin: clamp(1rem, 3vh, 2rem) auto;
}

.contact-modal-content {
  padding: 0;
  background: white;
  border-radius: 0;
  overflow: hidden;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
}

.contact-title {
  background: linear-gradient(135deg, #1a237e, #3f51b5);
  color: white;
  padding: clamp(20px, 4vw, 30px) clamp(20px, 5vw, 40px);
  margin: 0;
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  font-weight: 600;
  text-align: center;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.contact-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  min-height: clamp(400px, 50vh, 500px);
}

.contact-form-section {
  padding: clamp(20px, 4vw, 40px);
}

.contact-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: #1a237e;
  margin-bottom: clamp(8px, 1.5vw, 10px);
  font-weight: 600;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.contact-description {
  color: #666;
  margin-bottom: clamp(20px, 3vw, 30px);
  line-height: 1.6;
  font-size: clamp(0.9rem, 2vw, 1rem);
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 300;
}

.contact-form .form-group {
  margin-bottom: clamp(15px, 2.5vw, 25px);
}

.contact-form label {
  display: block;
  margin-bottom: clamp(5px, 1vw, 8px);
  font-weight: 600;
  color: #333;
  font-size: clamp(0.9rem, 1.8vw, 1rem);
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: clamp(10px, 1.5vw, 12px) clamp(12px, 2vw, 15px);
  border: 2px solid #e0e0e0;
  border-radius: 0;
  font-size: clamp(0.9rem, 1.8vw, 1rem);
  transition: border-color 0.3s ease;
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #1a237e;
}

.contact-form textarea {
  resize: vertical;
  min-height: clamp(80px, 12vh, 100px);
}

.form-actions {
  display: flex;
  gap: clamp(10px, 2vw, 15px);
  justify-content: flex-end;
  margin-top: clamp(20px, 3vw, 30px);
}

.submit-btn,
.cancel-btn {
  padding: clamp(10px, 1.5vw, 12px) clamp(20px, 3vw, 25px);
  border: none;
  border-radius: 0;
  font-size: clamp(0.9rem, 1.8vw, 1rem);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: clamp(100px, 15vw, 120px);
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.submit-btn {
  background: linear-gradient(135deg, #1a237e, #3f51b5);
  color: white;
}

.submit-btn:hover {
  background: linear-gradient(135deg, #0d47a1, #1a237e);
  transform: translateY(-1px);
}

.cancel-btn {
  background: #f5f5f5;
  color: #666;
  border: 1px solid #ddd;
}

.cancel-btn:hover {
  background: #e0e0e0;
}

.contact-info-section {
  background: #f8f9fa;
  padding: clamp(20px, 4vw, 40px) clamp(20px, 3.5vw, 30px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-info-group {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.contact-info-group:last-child {
  margin-bottom: 0;
}

.contact-info-group h3 {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: #1a237e;
  margin-bottom: clamp(8px, 1.5vw, 10px);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: clamp(6px, 1vw, 8px);
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
}

.contact-info-group p {
  color: #555;
  line-height: 1.6;
  margin: 0;
  font-size: clamp(0.9rem, 1.8vw, 1rem);
  font-family: 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 300;
}

#closeContactModal {
  position: absolute;
  top: 20px;
  right: 30px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  width: 35px;
  height: 35px;
  border-radius: 0;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 100;
}

#closeContactModal:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes bounceArrow {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-5px);
  }
  60% {
    transform: translateY(-3px);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section {
    min-height: 70vh;
    padding: 1.5rem 1rem;
  }
  
  .hero-actions {
    flex-direction: row;
    justify-content: center;
    margin-bottom: 3rem;
    gap: 0.5rem;
  }
  
  .hero-btn {
    flex: 1;
    min-width: 0;
    padding: 0.8rem 0.5rem;
    font-size: 0.85rem;
  }
  
  /* Hero Impact Showcase - 모바일 2x2 그리드 */
  .hero-impact-showcase {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
  }
  
  .hero-impact-card {
    padding: 1.2rem 0.8rem;
    border-radius: 12px;
  }
  
  .hero-metric-icon {
    font-size: 2rem;
    margin-bottom: 0.3rem;
  }
  
  .hero-metric-number {
    font-size: 2rem;
  }
  
  .hero-metric-label {
    font-size: 0.75rem;
    letter-spacing: 0.3px;
  }
  
  /* Latest Achievements - 모바일 2x2 그리드 */
  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .achievement-card {
    flex-direction: column;
    height: auto;
  }
  
  .achievement-card-image {
    flex: 0 0 180px;
    width: 100%;
    height: 180px;
  }
  
  .achievement-card-content {
    padding: 1rem;
  }
  
  .achievement-card-title {
    font-size: 0.9rem;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    margin-bottom: 0.5rem;
  }
  
  .achievement-card-authors {
    font-size: 0.75rem;
    -webkit-line-clamp: 1;
    line-clamp: 1;
  }
  
  .achievement-card-year {
    font-size: 0.75rem;
  }
  
  .achievement-card-journal {
    font-size: 0.75rem;
    -webkit-line-clamp: 1;
    line-clamp: 1;
  }
  
  .achievement-card-header {
    gap: 0.4rem;
    margin-bottom: 0.4rem;
  }
  
  .achievement-card-icon {
    width: 24px;
    height: 24px;
    font-size: 0.85rem;
  }
  
  .hero-title {
    font-size: clamp(2.2rem, 5.5vw, 2.8rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.2rem);
  }
  
  .hero-description {
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  }
  
  .hero-logo img {
    height: 60px;
  }
  
  .scroll-indicator {
    bottom: 20px;
  }
  
  .highlights-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .overview-grid {
    grid-template-columns: 1fr;
  }
  
  .overview-section,
  .highlights-section {
    padding: 4rem 1rem;
  }
  
  .overview-header h2,
  .highlights-header h2 {
    font-size: 2rem;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
  }
  
  .contact-info-section {
    padding: 30px;
  }
  
  .contact-form-section {
    padding: 30px;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .submit-btn,
  .cancel-btn {
    width: 100%;
  }
}

/* 모바??가�?모드 최적??*/
@media (max-width: 768px) and (orientation: landscape) {
  .hero-section {
    min-height: 100vh;
    padding: 1rem;
  }
  
  .hero-title {
    font-size: clamp(1.7rem, 4.5vw, 2.2rem);
    margin-bottom: 0.5rem;
  }
  
  .hero-subtitle {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    margin-bottom: 1rem;
  }
  
  .hero-description {
    font-size: clamp(0.85rem, 2vw, 0.95rem);
    margin-bottom: 1.5rem;
  }
  
  .hero-logo img {
    height: 50px;
  }
  
  .hero-actions {
    margin-bottom: 2rem;
    gap: 0.5rem;
  }
  
  .hero-btn {
    flex: 1;
    min-width: 0;
    padding: 0.7rem 0.5rem;
    font-size: 0.75rem;
  }
}

/* Scroll Animation Styles */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Section header animation */
.section-header.animate-on-scroll {
  transform: translateY(20px);
}

.section-header.animate-in .section-title {
  animation: slideInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.section-header.animate-in .section-subtitle {
  animation: slideInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.1s forwards;
  opacity: 0;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered animation for cards */
.hero-impact-card.animate-on-scroll,
.project-card.animate-on-scroll,
.achievement-card.animate-on-scroll,
.gallery-item.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px) scale(0.95);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-impact-card.animate-in,
.project-card.animate-in,
.achievement-card.animate-in,
.gallery-item.animate-in {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Contact info items animation */
.contact-info-item.animate-on-scroll {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-info-item.animate-in {
  opacity: 1;
  transform: translateX(0);
}

/* Contact form animation */
.contact-form-card.animate-on-scroll {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-form-card.animate-in {
  opacity: 1;
  transform: translateX(0);
}

/* Featured Projects Section */
.featured-projects-section {
  background: #ffffff;
  padding: 4rem 2rem;
  position: relative;
}

/* Desktop Layout - 5 Column Design (웹 화면 전용) */
.projects-desktop-layout {
  display: none; /* 기본적으로 숨김 (모바일) */
}

/* Mobile/Tablet Layout */
.projects-mobile-layout {
  display: block;
}

.section-container {
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.featured-projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.project-card {
  background: white;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.project-card-image {
  width: 100%;
  height: 280px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-card-image img {
  transform: scale(1.1);
}

.project-card-image::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to top, rgba(0,0,0,0.3), transparent);
}

.project-card-category {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(30, 41, 59, 0.9);
  backdrop-filter: blur(10px);
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.project-card-content {
  padding: 2rem;
}

.project-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 0.75rem;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card-description {
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid #f1f5f9;
}

.project-card-duration {
  font-size: 0.9rem;
  color: #94a3b8;
  font-weight: 500;
}

.project-card-arrow {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f8fafc;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.project-card:hover .project-card-arrow {
  background: #3b82f6;
  transform: translateX(5px);
}

.project-card:hover .project-card-arrow svg {
  stroke: white;
}

/* Latest Achievements Section */
.latest-achievements-section {
  background: linear-gradient(135deg, #f8faff 0%, #e8f4ff 100%);
  padding: 4rem 2rem;
  position: relative;
}

/* Desktop Layout - 5 Column Design (웹 화면 전용) */
.achievements-desktop-layout {
  display: none; /* 기본적으로 숨김 (모바일) */
}

/* Mobile/Tablet Layout */
.achievements-mobile-layout {
  display: block;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Desktop Column Layout (960px 이상 - 반 화면부터 적용) */
@media (min-width: 960px) {
  .latest-achievements-section {
    padding: 0;
    background: white;
    height: 100vh; /* 뷰포트 전체 높이 */
    display: flex;
    align-items: stretch;
  }

  .achievements-mobile-layout {
    display: none;
  }

  .achievements-desktop-layout {
    display: flex;
    width: 100%;
    height: 100%; /* 부모 높이에 맞춤 */
  }

  .achievement-column {
    flex: 1 1 20%; /* 5분할: 각각 20% */
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: flex 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* 1번 박스: 제목 + 버튼 */
  .achievement-header-column {
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem 2rem;
    gap: 3rem;
    flex: 1 1 20%;
  }

  .achievement-section-title {
    font-size: 3rem;
    font-weight: 900;
    text-align: center;
    line-height: 1.2;
    letter-spacing: -0.02em;
    /* 그라데이션 효과 제거 - 단색으로 변경 */
    color: #1e293b;
  }

  .achievement-view-more-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 0;
    transition: all 0.3s ease;
    border: 3px solid #1a237e;
  }

  .achievement-view-more-btn:hover {
    background: linear-gradient(135deg, #283593 0%, #3f51b5 100%);
    border-color: #3f51b5;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 35, 126, 0.3);
  }

  .achievement-view-more-btn svg {
    transition: transform 0.3s ease;
  }

  .achievement-view-more-btn:hover svg {
    transform: translateX(5px);
  }

  /* 2~5번 박스: 이미지 + 호버 정보 */
  .achievement-image-column {
    flex: 1 1 20%; /* 기본 20% */
  }

  .achievement-column-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .achievement-column-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.9) 100%);
    opacity: 0.6;
    transition: opacity 0.4s ease;
  }

  .achievement-column-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    color: white;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .achievement-type-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
  }

  .achievement-column-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    line-height: 1.3;
  }

  .achievement-column-authors {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
  }

  .achievement-column-year {
    font-size: 1rem;
    font-weight: 700;
    color: #7986cb;
    margin-bottom: 0.5rem;
  }

  .achievement-column-journal {
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.8;
  }

  /* Hover Effects */
  .achievement-image-column:hover {
    flex: 1 1 55%; /* 호버 시 비율 증가: 20% → 55% (80% 더 노출) */
  }

  .achievement-image-column:hover .achievement-column-background {
    transform: scale(1.1);
  }

  .achievement-image-column:hover .achievement-column-overlay {
    opacity: 1;
  }

  .achievement-image-column:hover .achievement-column-content {
    opacity: 1;
    transform: translateY(0);
  }

  /* Type-specific colors for badges (메인 블루 계열로 통일) */
  .achievement-column[data-type="publication"] .achievement-type-badge {
    background: rgba(63, 81, 181, 0.4);
    border: 1px solid rgba(121, 134, 203, 0.6);
  }

  .achievement-column[data-type="conference"] .achievement-type-badge {
    background: rgba(92, 107, 192, 0.4);
    border: 1px solid rgba(121, 134, 203, 0.6);
  }

  .achievement-column[data-type="award"] .achievement-type-badge {
    background: rgba(121, 134, 203, 0.4);
    border: 1px solid rgba(159, 168, 218, 0.6);
  }

  .achievement-column[data-type="patent"] .achievement-type-badge {
    background: rgba(40, 53, 147, 0.4);
    border: 1px solid rgba(92, 107, 192, 0.6);
  }

  /* Featured Projects Desktop Column Layout (960px 이상) */
  .featured-projects-section {
    padding: 0;
    background: white;
    height: 100vh;
    display: flex;
    align-items: stretch;
  }

  .projects-mobile-layout {
    display: none;
  }

  .projects-desktop-layout {
    display: flex;
    width: 100%;
    height: 100%;
  }

  .project-column {
    flex: 1 1 20%; /* 5분할: 각각 20% */
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: flex 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* 5번 박스: 제목 + 버튼 (마지막) */
  .project-header-column {
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem 2rem;
    gap: 3rem;
    flex: 1 1 20%;
  }

  .project-section-title {
    font-size: 3rem;
    font-weight: 900;
    text-align: center;
    line-height: 1.2;
    letter-spacing: -0.02em;
    /* 그라데이션 효과 제거 - 단색으로 변경 */
    color: #1e293b;
  }

  .project-view-more-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 0;
    transition: all 0.3s ease;
    border: 3px solid #1a237e;
  }

  .project-view-more-btn:hover {
    background: linear-gradient(135deg, #283593 0%, #3f51b5 100%);
    border-color: #3f51b5;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 35, 126, 0.3);
  }

  .project-view-more-btn svg {
    transition: transform 0.3s ease;
  }

  .project-view-more-btn:hover svg {
    transform: translateX(5px);
  }

  /* 1~4번 박스: 프로젝트 이미지 + 호버 정보 */
  .project-image-column {
    flex: 1 1 20%;
  }

  .project-column-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .project-column-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.9) 100%);
    opacity: 0.6;
    transition: opacity 0.4s ease;
  }

  .project-column-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    color: white;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .project-category-badge {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  }

  .project-column-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    line-height: 1.3;
  }

  .project-column-description {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 0.75rem;
    line-height: 1.5;
  }

  .project-column-duration {
    font-size: 0.9rem;
    opacity: 0.8;
    font-weight: 600;
  }

  /* Hover Effects for Projects */
  .project-image-column:hover {
    flex: 1 1 55%; /* 호버 시 비율 증가: 20% → 55% */
  }

  .project-image-column:hover .project-column-background {
    transform: scale(1.1);
  }

  .project-image-column:hover .project-column-overlay {
    opacity: 1;
  }

  .project-image-column:hover .project-column-content {
    opacity: 1;
    transform: translateY(0);
  }
}

.achievement-card {
  background: white;
  border-radius: 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  display: flex;
  flex-direction: row;
  overflow: hidden;
  height: 330px;
}

.achievement-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.achievement-card-image {
  flex: 0 0 50%;
  width: 50%;
  height: 100%;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.achievement-card-image img,
.achievement-card-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.achievement-card:hover .achievement-card-image img {
  transform: scale(1.1);
}

.achievement-card-content {
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  border-left: 4px solid transparent;
}

.achievement-card[data-type="publication"] .achievement-card-content {
  border-left-color: #3b82f6;
}

.achievement-card[data-type="conference"] .achievement-card-content {
  border-left-color: #8b5cf6;
}

.achievement-card[data-type="award"] .achievement-card-content {
  border-left-color: #f59e0b;
}

.achievement-card[data-type="patent"] .achievement-card-content {
  border-left-color: #10b981;
}

.achievement-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.achievement-card-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.achievement-card[data-type="publication"] .achievement-card-icon {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.achievement-card[data-type="conference"] .achievement-card-icon {
  background: rgba(139, 92, 246, 0.1);
  color: #8b5cf6;
}

.achievement-card[data-type="award"] .achievement-card-icon {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.achievement-card[data-type="patent"] .achievement-card-icon {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.achievement-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: auto;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 6;
  line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.achievement-card-authors {
  color: #64748b;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  margin-top: 0.5rem;
  font-style: italic;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.achievement-card-year {
  font-size: 0.85rem;
  color: #3b82f6;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.achievement-card-journal {
  color: #475569;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.achievement-card-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: auto;
}

.keyword-tag {
  background: #f1f5f9;
  color: #475569;
  padding: 0.25rem 0.5rem;
  border-radius: 0;
  font-size: 0.65rem;
  font-weight: 500;
}

/* Gallery Preview Section */
.gallery-preview-section {
  background: #ffffff;
  padding: 4rem 2rem;
  position: relative;
}

.gallery-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.gallery-item {
  position: relative;
  border-radius: 0;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
  background: #f8fafc;
}

.gallery-item-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.gallery-item:hover .gallery-item-image {
  transform: scale(1.1);
}

.gallery-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  padding: 2rem 1.5rem 1.5rem;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.gallery-item:hover .gallery-item-overlay {
  transform: translateY(0);
}

.gallery-item-title {
  color: white;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.gallery-item-description {
  color: rgba(255,255,255,0.9);
  font-size: 0.9rem;
  line-height: 1.4;
}

.gallery-item-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 0.4rem 0.9rem;
  border-radius: 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: #1e293b;
  z-index: 2;
}

/* Contact Us Section */
.contact-us-section {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  padding: 8rem 2rem;
  position: relative;
  overflow: hidden;
}

.contact-us-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.contact-us-section .section-container {
  position: relative;
  z-index: 1;
}

.contact-us-section .section-title {
  color: white;
  margin-bottom: 1rem;
}

.contact-us-section .section-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.contact-us-content {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.contact-us-info {
  color: white;
}

.contact-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.contact-info-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.contact-icon {
  width: 56px;
  height: 56px;
  min-width: 56px;
  background: rgba(59, 130, 246, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.contact-info-item:hover .contact-icon {
  background: rgba(59, 130, 246, 0.25);
  border-color: rgba(59, 130, 246, 0.5);
  transform: translateY(-3px);
}

.contact-icon svg {
  stroke: #3b82f6;
}

.contact-info-text h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  margin-bottom: 0.5rem;
}

.contact-info-text p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  margin: 0;
}

.contact-us-form {
  background: white;
  border-radius: 16px;
  padding: 0;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  width: 100%;
}

.contact-form-card {
  padding: 2.5rem;
}

.contact-form-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 2rem;
}

.home-contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.home-contact-form .form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.home-contact-form label {
  font-size: 0.95rem;
  font-weight: 600;
  color: #475569;
}

.home-contact-form input,
.home-contact-form textarea {
  padding: 0.9rem 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  background: #f8fafc;
}

.home-contact-form input:focus,
.home-contact-form textarea:focus {
  outline: none;
  border-color: #3b82f6;
  background: white;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.home-contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.contact-submit-btn:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.contact-submit-btn svg {
  transition: transform 0.3s ease;
}

.contact-submit-btn:hover svg {
  transform: translateX(3px);
}

/* Common Styles for All Sections */
.section-action {
  text-align: center;
  margin-top: 2rem;
}

.view-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  padding: 1rem 2.5rem;
  border-radius: 0;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  transition: all 0.4s ease;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.view-more-btn:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.view-more-btn svg {
  transition: transform 0.3s ease;
}

.view-more-btn:hover svg {
  transform: translateX(5px);
}

.research-card {
  background: white;
  border-radius: 0;
  padding: 2.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid #f1f5f9;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
  transition: left 0.5s ease;
}

.research-card:hover::before {
  left: 100%;
}

.research-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.15);
  border-color: #3b82f6;
}

.card-icon {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  display: block;
}

.research-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 1rem;
}

.research-card p {
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.card-stats {
  margin-bottom: 2rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: #3b82f6;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 0;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.card-link:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.card-link svg {
  width: 16px;
  height: 16px;
}

  .section-title {
    font-size: 3.5rem;
    font-weight: 800;
    /* 그라데이션 효과 제거 - 단색으로 변경 */
    color: #1e293b;
    margin-bottom: 1.5rem;
  }@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.section-subtitle {
  font-size: 1.3rem;
  color: #64748b;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}



.impact-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.impact-card {
  background: white;
  border-radius: 0;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid #f1f5f9;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.impact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6, #ec4899);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.impact-card:hover::before {
  transform: scaleX(1);
}

.impact-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.metric-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

.metric-content {
  flex: 1;
}

.metric-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: #1e293b;
  margin-bottom: 0.5rem;
  display: block;
}

.metric-label {
  font-size: 1rem;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .excellence-section {
    padding: 4rem 1rem;
  }
  
  .section-title {
    font-size: 2.5rem;
  }
  
  .section-subtitle {
    font-size: 1.1rem;
  }
  
  .research-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .impact-showcase {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .impact-card {
    padding: 1.5rem;
  }
  
  .metric-number {
    font-size: 2.5rem;
  }
}

@media (max-width: 480px) {
  .excellence-section {
    padding: 3rem 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .impact-showcase {
    grid-template-columns: 1fr;
  }
  
  .impact-card {
    padding: 1.25rem;
  }
  
  /* Hero Impact Showcase - 작은 모바일 */
  .hero-impact-showcase {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
    margin-top: 1.5rem;
  }
  
  .hero-impact-card {
    padding: 1rem 0.6rem;
    border-radius: 10px;
  }
  
  .hero-metric-icon {
    font-size: 1.8rem;
    margin-bottom: 0.2rem;
  }
  
  .hero-metric-number {
    font-size: 1.8rem;
  }
  
  .hero-metric-label {
    font-size: 0.7rem;
    letter-spacing: 0.2px;
  }
  
  .hero-description {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
  }
}

/* 모바?????�이지 최적??*/
@media screen and (max-width: 428px) {
  .hero-section {
    min-height: clamp(400px, 100vh, 800px);
    padding: 2rem 1rem;
  }
  
  .hero-title {
    font-size: clamp(1.8rem, 5vw, 2rem);
    line-height: 1.2;
    margin-bottom: 1rem;
  }
  
  .hero-subtitle {
    font-size: clamp(0.95rem, 3vw, 1rem);
    line-height: 1.4;
    margin-bottom: 1.5rem;
  }
  
  .hero-description {
    font-size: clamp(0.85rem, 2.5vw, 0.95rem);
    line-height: 1.5;
  }
  
  .hero-logo img {
    height: clamp(40px, 10vw, 60px);
  }
  
  .hero-cta {
    padding: 0.8rem 2rem;
    font-size: 0.9rem;
  }
  
  .quick-access {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 2rem 1rem;
  }
  
  .quick-item {
    padding: 1.2rem 1rem;
    border-radius: 0;
  }
  
  .quick-icon {
    font-size: 2rem;
    margin-bottom: 0.8rem;
  }
  
  .quick-title {
    font-size: 1rem;
    margin-bottom: 0.4rem;
  }
  
  .quick-desc {
    font-size: 0.8rem;
    line-height: 1.3;
  }
  
  .section-title {
    font-size: clamp(1.6rem, 5vw, 1.8rem);
    margin-bottom: 1rem;
  }
  
  .highlights-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .highlight-card {
    padding: 1.5rem 1rem;
    border-radius: 0;
  }
  
  .highlight-title {
    font-size: 1.2rem;
  }
  
  .highlight-desc {
    font-size: 0.9rem;
    line-height: 1.4;
  }
  
  /* ?�촉 모달 최적??*/
  .contact-modal .modal-content {
    width: 95vw;
    max-width: 95vw;
    margin: 0.5rem auto;
  }
  
  .contact-modal-content {
    padding: 0;
    margin: 0;
    max-height: calc(100vh - 1rem);
    border-radius: 0;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  
  .contact-title {
    font-size: 1.3rem;
    padding: 1.2rem 1rem;
  }
  
  .contact-form-section {
    padding: 1.5rem 1.2rem;
  }
  
  .contact-subtitle {
    font-size: 1.1rem;
  }
  
  .contact-description {
    font-size: 0.9rem;
    margin-bottom: 1.2rem;
  }
  
  .contact-form .form-group {
    margin-bottom: 1rem;
  }
  
  .contact-form label {
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
  }
  
  .contact-form input,
  .contact-form textarea {
    font-size: 0.95rem;
    padding: 0.7rem;
  }
  
  .contact-form textarea {
    min-height: 80px;
  }
  
  .form-actions {
    gap: 0.6rem;
    margin-top: 1.2rem;
    flex-wrap: wrap;
  }
  
  .submit-btn,
  .cancel-btn {
    font-size: 0.9rem;
    padding: 0.7rem 1.2rem;
    min-width: 100px;
    flex: 1;
  }
  
  .contact-info-section {
    padding: 1.5rem 1.2rem;
    border-top: 1px solid #e0e0e0;
  }
  
  .contact-info-group {
    margin-bottom: 1.5rem;
  }
  
  .contact-info-group h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
  }
  
  .contact-info-group p {
    font-size: 0.85rem;
  }
  
  #closeContactModal {
    top: 0.8rem;
    right: 0.8rem;
    width: 32px;
    height: 32px;
    font-size: 1.8rem;
  }
}

/* ?�형 모바??최적??*/
@media screen and (max-width: 375px) {
  .hero-section {
    min-height: clamp(350px, 100vh, 700px);
    padding: 1.5rem 1rem;
  }
  
  .quick-access {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .hero-title {
    font-size: clamp(1.6rem, 6vw, 1.8rem);
  }
  
  .hero-subtitle {
    font-size: clamp(0.9rem, 3.5vw, 0.95rem);
  }
  
  .hero-description {
    font-size: clamp(0.8rem, 3vw, 0.9rem);
  }
  
  .hero-logo img {
    height: clamp(35px, 8vw, 50px);
  }
  
  .section-title {
    font-size: clamp(1.4rem, 6vw, 1.6rem);
  }
  
  .highlight-card {
    padding: 1.2rem 0.8rem;
  }
}

/* ?�블�?최적??*/
@media screen and (min-width: 429px) and (max-width: 1024px) {
  .hero-section {
    min-height: clamp(600px, 100vh, 1000px);
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 4vw, 3rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  }
  
  .hero-description {
    font-size: clamp(1rem, 2vw, 1.2rem);
  }
  
  .hero-logo img {
    height: clamp(60px, 8vw, 80px);
  }
}

/* ?�???�스?�톱 최적??*/
@media screen and (min-width: 1920px) {
  .hero-section {
    max-height: 1200px;
  }
  
  .hero-title {
    font-size: 4rem;
  }
  
  .hero-subtitle {
    font-size: 1.8rem;
  }
  
  .hero-description {
    font-size: 1.3rem;
  }
}

/* Responsive Design for New Sections */
@media (max-width: 1024px) {
  .featured-projects-section,
  .latest-achievements-section,
  .gallery-preview-section {
    padding: 5rem 1.5rem;
  }

  .featured-projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .gallery-preview-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .featured-projects-section,
  .latest-achievements-section,
  .gallery-preview-section,
  .contact-us-section {
    padding: 4rem 1rem;
  }

  .section-title {
    font-size: 2.5rem;
  }

  .section-subtitle {
    font-size: 1.05rem;
  }

  /* Contact Us Section - Tablet */
  .contact-us-content {
    max-width: 700px;
  }

  .featured-projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .project-card-image {
    height: 240px;
  }

  .project-card-title {
    font-size: 0.975rem; /* 0.65rem에서 50% 증가 */
  }
  
  .project-card-description {
    font-size: 0.78rem; /* 제목보다 작게 (80%) */
  }

  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .achievement-card {
    flex-direction: column;
    height: auto;
  }

  .achievement-card-image {
    flex: 0 0 auto;
    width: 100%;
    height: 200px;
  }

  .achievement-card-content {
    padding: 1.5rem;
    border-left: none;
    border-top: 4px solid transparent;
  }

  .achievement-card[data-type="publication"] .achievement-card-content {
    border-left-color: transparent;
    border-top-color: #3b82f6;
  }

  .achievement-card[data-type="conference"] .achievement-card-content {
    border-left-color: transparent;
    border-top-color: #8b5cf6;
  }

  .achievement-card[data-type="award"] .achievement-card-content {
    border-left-color: transparent;
    border-top-color: #f59e0b;
  }

  .achievement-card[data-type="patent"] .achievement-card-content {
    border-left-color: transparent;
    border-top-color: #10b981;
  }
  
  .achievement-card-title {
    font-size: 0.75rem; /* 0.5rem에서 50% 증가 */
  }
  
  .achievement-card-authors {
    font-size: 0.6rem; /* 제목보다 작게 (80%) */
  }
  
  .achievement-card-journal {
    font-size: 0.6rem; /* 제목보다 작게 (80%) */
  }

  .achievement-card:hover {
    transform: translateY(-4px);
  }

  .gallery-preview-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .view-more-btn {
    padding: 0.85rem 2rem;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .featured-projects-section,
  .latest-achievements-section,
  .gallery-preview-section {
    padding: 3rem 1rem;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .section-subtitle {
    font-size: 0.95rem;
  }

  .project-card-image {
    height: 200px;
  }

  .project-card-content {
    padding: 1.5rem;
  }

  .project-card-title {
    font-size: 0.863rem; /* 0.575rem에서 50% 증가 */
  }

  .project-card-description {
    font-size: 0.69rem; /* 제목보다 작게 (80%) */
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }

  .achievement-card-title {
    font-size: 0.825rem; /* 0.55rem에서 50% 증가 */
  }
  
  .achievement-card-authors {
    font-size: 0.66rem; /* 제목보다 작게 (80%) */
  }
  
  .achievement-card-journal {
    font-size: 0.66rem; /* 제목보다 작게 (80%) */
  }

  .achievement-card-icon {
    width: 40px;
    height: 40px;
    font-size: 1.3rem;
  }

  .gallery-preview-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .gallery-item {
    aspect-ratio: 16/10;
  }

  .view-more-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    gap: 0.5rem;
  }

  /* Contact Us Section - Mobile */
  .contact-us-section {
    padding: 3rem 1rem;
  }

  .contact-us-content {
    max-width: 100%;
    padding: 0 1rem;
  }

  .contact-form-card {
    padding: 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .contact-form-title {
    font-size: 1.5rem;
  }

  .contact-submit-btn {
    width: 100%;
  }
}