body {
  margin: 0;
  padding: 0;
  font-family: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

/* 유틸리티: 공통 컨테이너 (너비 및 중앙 정렬) */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 상단 고정 네비게이션 */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: #000000;
  border-bottom: 1px solid #333;
  z-index: 1000;
}

/* 네비게이션 내 컨테이너 설정 */
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

/* 메뉴 */
.nav-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 24px;
}

.nav-menu a {
  text-decoration: none;
  color: #ffffff;
  font-weight: 500;
  padding: 8px 12px;
  transition: opacity 0.2s;
}

.nav-menu a:hover {
  opacity: 0.8;
}

.logo {
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
  color: #ffffff;
  display: flex;
  align-items: center;
}

/* 언어 전환 버튼 스타일 */
.lang-switch {
  display: inline-block;
  padding: 4px 10px !important;
  border: 1px solid #ffffff;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-left: 10px;
  background-color: transparent;
  transition: all 0.3s ease !important;
}

.lang-switch:hover {
  background-color: #ffffff !important;
  color: #000000 !important;
  opacity: 1 !important;
}

/* 드롭다운 */
.dropdown {
  position: relative;
}

.dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #1a1a1a;
  min-width: 200px;
  border: 1px solid #333;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  display: none;
  flex-direction: column;
}

.dropdown-content li a {
  padding: 12px 16px;
  display: block;
  color: #eeeeee;
  border-bottom: 1px solid #222;
}

.dropdown-content li a:hover {
  background-color: #333333;
  color: #ffffff;
}

/* 모바일 메뉴 토글 버튼 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 25px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  background-color: #fff;
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* (두번째 구조) 페이지 헤더 / Hero 섹션 */
.page-header {
  position: relative;
  height: 225px;
  background: url('/images/smartconnection.png') no-repeat center center/cover;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 60px;
  color: #fff;
  text-align: center;
}

.page-header .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4));
  z-index: 1;
}

.page-header .header-content {
  position: relative;
  z-index: 2;
}

.page-header h1 {
  font-size: 3.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -2px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.title-underline {
  width: 320px;
  height: 6px;
  background-color: #ffda00;
  margin: 0 auto;
  border-radius: 3px;
}

/* (세번째 구조) 메인 콘텐츠 */
.main-content {
  padding: 100px 0;
  min-height: 600px;
}

/* (네번째 구조) Footer */
.footer {
  background-color: #000;
  color: #eee;
  padding: 30px 0;
  border-top: 1px solid #333;
}

.footer-copyright {
  text-align: center;
  font-size: 0.95rem;
  color: #fff;
  margin: 0;
}

/* 가변형 디자인 (반응형) */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 60px);
    background-color: #000;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    padding: 20px 0;
    z-index: 999;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-menu ul {
    flex-direction: column;
    gap: 0;
  }

  .nav-menu ul li {
    width: 100%;
  }

  .nav-menu a {
    display: block;
    padding: 18px 25px;
    border-bottom: 1px solid #1a1a1a;
  }

  .dropdown-content {
    position: static;
    width: 100%;
    background-color: #0a0a0a;
    box-shadow: none;
    border: none;
    border-left: 4px solid #333;
    padding-left: 10px;
  }

  .page-header {
    height: 180px;
  }

  .page-header h1 {
    font-size: 2.3rem;
  }

  .main-content {
    padding: 60px 0;
  }
}

/* 햄버거 버튼 애니메이션 */
.menu-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 홈 콘텐츠 스타일 */
.home-container {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.intro-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 40px;
}

.intro-text h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: #000;
}

.tagline {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffda00;
  background-color: #000;
  display: inline-block;
  padding: 6px 15px;
  margin-bottom: 20px;
  border-radius: 4px;
}

.description {
  font-size: 1.15rem;
  color: #555;
  line-height: 1.8;
}

.profile-image-area {
  /* display: flex; center 정렬 제거하고 꽉 차게 변경 */
  display: block;
}

.profile-image-box {
  width: 100%;
  /* 너비는 100% 유지 */
  height: 400px;
  /* 높이 제한 */
  overflow: hidden;
  border-radius: 20px;
  /* 컨테이너에 둥근 모서리 적용 */
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  /* 그림자 */
}

.profile-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 비율 유지하며 꽉 채우기 (잘림 발생 가능) */
  object-position: top center;
  /* 인물 사진이므로 상단 중심 기준 */
}


.vision-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.vision-card {
  background: #fff;
  padding: 45px 30px;
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid #f0f0f0;
}

.vision-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.1);
  border-color: #ffda00;
}

.vision-card .icon {
  font-size: 3.5rem;
  margin-bottom: 25px;
}

.vision-card h3 {
  margin-bottom: 18px;
  font-size: 1.6rem;
  font-weight: 700;
}

.expertise-summary h2 {
  text-align: center;
  margin-bottom: 60px;
  font-size: 2.2rem;
  font-weight: 800;
}

.expertise-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 35px;
}

.expertise-item {
  background: #fff;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

.expertise-item:hover {
  transform: scale(1.02);
}

.item-content {
  padding: 30px;
}

.item-content h4 {
  font-size: 1.4rem;
  margin-bottom: 15px;
  font-weight: 700;
  color: #000;
}

.item-content p {
  color: #666;
  font-size: 1.05rem;
}

.contact-cta {
  text-align: center;
  padding: 60px 0;
}

.cta-box {
  background: linear-gradient(135deg, #000 0%, #222 100%);
  color: #fff;
  padding: 80px 40px;
  border-radius: 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.cta-box h3 {
  font-size: 2.5rem;
  margin-bottom: 25px;
  font-weight: 800;
}

.cta-box p {
  font-size: 1.2rem;
  color: #aaa;
  margin-bottom: 40px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 25px;
}

.btn {
  padding: 15px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
  background: #ffda00;
  color: #000;
}

.btn-primary:hover {
  background: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(255, 218, 0, 0.3);
}

.btn-secondary {
  border: 2px solid rgba(255, 255, 255, 0.2);
  color: #fff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  transform: translateY(-3px);
}

@media (max-width: 768px) {
  .home-container {
    gap: 60px;
  }

  .intro-section {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 30px;
  }

  .intro-text h2 {
    font-size: 2rem;
  }

  .cta-box {
    padding: 60px 25px;
  }

  .cta-box h3 {
    font-size: 1.8rem;
  }

  .cta-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .btn {
    width: 100%;
    box-sizing: border-box;
  }
}