/* ============================================================
   LTX International — Main Stylesheet  (Light Theme)
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --primary:        #1155a8;
  --primary-dark:   #0a3d7a;
  --primary-light:  #2472cc;
  --accent:         #0096c7;
  --accent-light:   #48cae4;
  --accent-pale:    #e0f4ff;

  /* Light backgrounds */
  --bg-hero:        #f0f6ff;          /* 매우 연한 하늘색 */
  --bg-hero2:       #ddeeff;
  --bg-section-alt: #f5f9ff;
  --bg-dark-footer: #1b2d4f;

  --text-primary:   #0f2444;
  --text-secondary: #4a5878;
  --text-light:     #7a8aa4;
  --white:          #ffffff;
  --gray-50:        #f8fafc;
  --gray-100:       #f1f5f9;
  --gray-200:       #e2e8f0;
  --gray-300:       #cbd5e1;
  --success:        #10b981;
  --warning:        #f59e0b;
  --error:          #ef4444;

  --shadow-sm:  0 1px 4px rgba(17,85,168,.08);
  --shadow-md:  0 4px 20px rgba(17,85,168,.12);
  --shadow-lg:  0 10px 40px rgba(17,85,168,.16);
  --shadow-xl:  0 20px 60px rgba(17,85,168,.20);

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;

  --transition: .3s cubic-bezier(.4,0,.2,1);

  --font-body:    'Inter', sans-serif;
  --font-heading: 'Montserrat', sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- Layout ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section   { padding: 100px 0; position: relative; }

/* ---------- Section Header ---------- */
.section-header { text-align: center; margin-bottom: 64px; }

.section-eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0,150,199,.1);
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  transition: all var(--transition);
  letter-spacing: .02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  box-shadow: 0 4px 20px rgba(17,85,168,.30);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  box-shadow: 0 8px 30px rgba(17,85,168,.45);
  transform: translateY(-2px);
  color: var(--white);
}

.btn-outline {
  background: rgba(255,255,255,.12);
  color: var(--white);
  border: 2px solid rgba(255,255,255,.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,.25);
  color: var(--white);
  border-color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
}

.btn-full { width: 100%; justify-content: center; }

/* ============================================================
   NAVBAR  —  light / transparent → white on scroll
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  background: #ffffff;
  box-shadow: 0 2px 16px rgba(17,85,168,.10);
  transition: all var(--transition);
}

.navbar.scrolled {
  background: #ffffff;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 24px rgba(17,85,168,.14);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

/* ── Logo image ── */
.logo { display: flex; align-items: center; }

.logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  display: block;
  /* 흰 배경 로고이므로 rounded + subtle shadow로 띄움 */
  border-radius: 6px;
  background: transparent;
  padding: 0;
  box-shadow: none;
  transition: box-shadow var(--transition), transform var(--transition);
}
.logo-img:hover {
  box-shadow: 0 4px 16px rgba(17,85,168,.22);
  transform: translateY(-1px);
}

/* ── Text logo fallback (footer) ── */
.logo-ltx  { color: var(--primary); font-weight: 800; font-family: var(--font-heading); }
.logo-int  { color: var(--text-primary); font-weight: 600; font-family: var(--font-heading); }

/* Nav links */
.nav-links { display: flex; align-items: center; gap: 8px; }

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  font-size: .9rem;
  padding: 8px 16px;
  border-radius: 50px;
  transition: all var(--transition);
}
/* 항상 파란 계열 텍스트 */
.navbar:not(.scrolled) .nav-link { color: var(--primary-dark); }
.nav-link:hover { color: var(--primary); background: rgba(17,85,168,.08); }
.nav-link.active { color: var(--primary); font-weight: 600; }

.nav-link.cta-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white) !important;
  padding: 8px 22px;
  font-weight: 600;
}
.nav-link.cta-btn:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(17,85,168,.35);
}

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; width: 28px; }
.hamburger span {
  display: block; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ============================================================
   HERO  —  배경 이미지 + 오버레이
   ============================================================ */
.hero-section {
  min-height: 100vh;
  background:
    url('../images/hero-bg.jpg') center center / cover no-repeat;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* 이미지 위 반투명 그라디언트 오버레이 — 좌측 텍스트 가독성 확보 */
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      105deg,
      rgba(10, 30, 70, 0.78) 0%,
      rgba(10, 40, 90, 0.60) 45%,
      rgba(10, 50, 110, 0.25) 75%,
      rgba(10, 50, 110, 0.10) 100%
    );
}

/* Hex grid — 흰 반투명 선으로 변경 */
.hero-bg-anim { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.hex-grid     { position: absolute; top: -10%; right: -5%; width: 55%; height: 120%; opacity: .10; }

.hex {
  position: absolute;
  border: 2px solid #ffffff;
  border-radius: 8px;
  animation: hexFloat 8s ease-in-out infinite;
}
.h1 { width:160px; height:160px; top:10%;  right:20%; animation-delay:0s;   transform: rotate(30deg); }
.h2 { width:220px; height:220px; top:30%;  right:5%;  animation-delay:1.5s; transform: rotate(15deg); }
.h3 { width:100px; height:100px; top:55%;  right:35%; animation-delay:3s;   transform: rotate(45deg); }
.h4 { width:260px; height:260px; top:60%;  right:10%; animation-delay:.8s;  transform: rotate(20deg); }
.h5 { width:140px; height:140px; top:5%;   right:45%; animation-delay:2.2s; transform: rotate(10deg); }
.h6 { width:80px;  height:80px;  top:80%;  right:50%; animation-delay:4s;   transform: rotate(60deg); }

@keyframes hexFloat {
  0%,100% { transform: translateY(0)     rotate(30deg); }
  50%      { transform: translateY(-20px) rotate(30deg); }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 100px;
  padding-bottom: 60px;
  max-width: 740px;
}

.hero-tagline {
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.15;
  margin-bottom: 24px;
  text-shadow: 0 2px 12px rgba(0,0,0,.25);
}

.hero-title .highlight {
  background: linear-gradient(90deg, #7ec8f8, #48cae4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,.85);
  max-width: 580px;
  margin-bottom: 36px;
  line-height: 1.8;
  text-shadow: 0 1px 4px rgba(0,0,0,.2);
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }

/* Hero stats */
.hero-stats { display: flex; align-items: center; flex-wrap: wrap; }

.stat { display: flex; flex-direction: column; padding: 0 32px 0 0; }
.stat:first-child { padding-left: 0; }

.stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
}
.stat-label {
  font-size: .78rem;
  color: rgba(255,255,255,.65);
  margin-top: 4px;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,.25); margin-right: 32px; }

.scroll-down {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.7);
  font-size: 1.2rem;
  animation: bounce 2s infinite;
  z-index: 2;
  opacity: .8;
}
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(10px); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-section { background: var(--white); }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }

.about-text p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.8; font-size: 1.02rem; }

.about-highlights { margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.about-highlights li { display: flex; align-items: center; gap: 12px; font-weight: 500; color: var(--text-primary); }
.about-highlights li i { color: var(--success); font-size: 1.1rem; }

.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.about-info-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.about-info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.info-icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: 1rem; flex-shrink: 0;
}

.info-body h4 {
  font-size: .78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-light); margin-bottom: 4px;
}
.info-body p, .info-body a { font-size: .88rem; color: var(--text-secondary); line-height: 1.5; }
.info-body a:hover { color: var(--primary); }

/* ============================================================
   PRODUCTS
   ============================================================ */
.products-section { background: var(--bg-section-alt); }

/* Tabs */
.product-tabs {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 48px;
  border-bottom: 2px solid var(--gray-200);
  padding-bottom: 0;
}

.tab-btn {
  padding: 12px 24px;
  font-weight: 600; font-size: .9rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all var(--transition);
  position: relative; bottom: -2px;
  border-bottom: 2px solid transparent;
  background: transparent;
}
.tab-btn:hover { color: var(--primary); background: var(--white); }
.tab-btn.active { color: var(--primary); background: var(--white); border-bottom: 2px solid var(--primary); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Product Intro */
.product-intro {
  display: flex; gap: 24px; align-items: flex-start;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: 36px; margin-bottom: 36px;
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.product-intro-icon {
  width: 64px; height: 64px;
  background: rgba(255,255,255,.2);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; flex-shrink: 0;
}
.product-intro h3 { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; margin-bottom: 10px; }
.product-intro p  { opacity: .9; line-height: 1.7; }

/* Model Grid */
.model-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }

.model-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 2px solid var(--gray-200);
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.model-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0); transition: transform var(--transition);
}
.model-card:hover::before { transform: scaleX(1); }
.model-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.model-card.featured { background: #f0f7ff; border-color: var(--primary-light); }
.model-card.featured::before { transform: scaleX(1); }

/* Model card product image */
.model-card-img {
  margin: 0 0 16px 0;
  border-radius: var(--radius-sm);
  height: 135px;
  width: 100%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.model-card-img img {
  width: auto;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
  transition: transform .5s ease;
}
.model-card:hover .model-card-img img {
  transform: scale(1.05);
}

.model-badge {
  display: inline-block; font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--primary); background: rgba(17,85,168,.1);
  padding: 3px 10px; border-radius: 50px; margin-bottom: 12px;
}
.model-name { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 800; color: var(--text-primary); margin-bottom: 10px; }
.model-desc { font-size: .88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.model-features { display: flex; flex-direction: column; gap: 8px; }
.model-features li { display: flex; align-items: center; gap: 8px; font-size: .84rem; color: var(--text-secondary); }
.model-features li i { color: var(--primary); font-size: .6rem; }

/* Single Product Card */
.single-product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 2px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.sp-features { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

.sp-feat {
  display: flex; align-items: center; gap: 14px;
  padding: 18px;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.sp-feat:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); background: var(--white); }
.sp-feat i {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: .95rem; flex-shrink: 0;
}
.sp-feat span { font-size: .88rem; color: var(--text-secondary); font-weight: 500; }

/* Isolator Grid */
/* ============================================================
   GLOVE LEAK TESTER
   ============================================================ */
/* GLT product image */
.glt-image-wrap {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  border: 2px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}
.glt-image-wrap img {
  width: 100%;
  max-height: 340px;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.glt-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.glt-features-card,
.glt-specs-card {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.glt-features-card h4,
.glt-specs-card h4,
.glt-how-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.glt-features-card h4 i,
.glt-specs-card h4 i,
.glt-how-card h4 i {
  color: var(--primary);
}

.glt-feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.glt-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.glt-feature-list li i { color: var(--success); font-size: .95rem; flex-shrink: 0; margin-top: 2px; }

/* Spec Table */
.glt-spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
.glt-spec-table tr {
  border-bottom: 1px solid var(--gray-100);
  transition: background var(--transition);
}
.glt-spec-table tr:last-child { border-bottom: none; }
.glt-spec-table tr:hover { background: var(--gray-50); }
.glt-spec-table th {
  text-align: left;
  padding: 10px 12px;
  color: var(--text-light);
  font-weight: 600;
  width: 42%;
  white-space: nowrap;
}
.glt-spec-table td {
  padding: 10px 12px;
  color: var(--text-primary);
  font-weight: 500;
}

/* How It Works */
.glt-how-card {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.glt-steps {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.glt-step {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-section-alt);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  flex: 1;
  min-width: 160px;
}

.glt-step-num {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}

.glt-step-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.glt-step-text strong {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-primary);
}
.glt-step-text span {
  font-size: .78rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.glt-step-arrow {
  color: var(--primary);
  font-size: 1rem;
  opacity: .5;
  flex-shrink: 0;
}

/* Compliance Badges */
.glt-compliance {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.compliance-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 600;
  box-shadow: 0 3px 10px rgba(17,85,168,.25);
  transition: all var(--transition);
}
.compliance-badge:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(17,85,168,.35); }
.compliance-badge i { font-size: .8rem; }

/* Responsive GLT */
@media (max-width: 768px) {
  .glt-layout { grid-template-columns: 1fr; }
  .glt-steps { flex-direction: column; }
  .glt-step-arrow { transform: rotate(90deg); }
  .glt-step { width: 100%; }
}

/* ============================================================ */
.isolator-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

.isolator-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 2px solid var(--gray-200);
  transition: all var(--transition);
}
.isolator-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.isolator-card.featured { background: #f0f7ff; border-color: var(--primary-light); }

.iso-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: 1.4rem; margin-bottom: 20px;
}

/* Isolator card product image */
.isolator-card-img {
  width: 100%;
  height: 135px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.isolator-card-img img {
  width: auto;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
  transition: transform .5s ease;
}
.isolator-card:hover .isolator-card-img img {
  transform: scale(1.05);
}
.isolator-card h4 { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
.isolator-card p  { font-size: .88rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.isolator-card ul { display: flex; flex-direction: column; gap: 8px; }
.isolator-card li {
  font-size: .84rem; color: var(--text-secondary);
  padding-left: 16px; position: relative;
}
.isolator-card li::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 6px; height: 6px; background: var(--accent); border-radius: 50%;
}

/* ============================================================
   SERVICES
   ============================================================ */
.services-section { background: var(--white); overflow: hidden; }

.services-bg-pattern {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(17,85,168,.04) 0%, transparent 55%),
    radial-gradient(circle at 85% 80%, rgba(0,150,199,.04) 0%, transparent 55%);
}

.services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; position: relative; z-index: 1; }

/* Service banner image */
.service-banner-img {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 48px;
  box-shadow: var(--shadow-lg);
  height: 280px;
}
.service-banner-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  transition: transform .6s ease;
}
.service-banner-img:hover img { transform: scale(1.03); }

/* Service card image */
.service-card-img {
  margin: -40px -32px 28px -32px;
  height: 200px;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.service-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform .5s ease;
}
.service-card:hover .service-card-img img { transform: scale(1.05); }

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  border-top: 4px solid transparent;
  overflow: hidden;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-top-color: var(--primary); }

.service-icon-wrap {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: 1.8rem; margin-bottom: 24px;
}
.service-card h3 { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 14px; }
.service-card p   { font-size: .9rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }

.service-list { display: flex; flex-direction: column; gap: 10px; }
.service-list li { display: flex; align-items: center; gap: 10px; font-size: .87rem; color: var(--text-secondary); }
.service-list li i { color: var(--primary); font-size: .8rem; }

/* ============================================================
   EXPERIMENTAL DATA
   ============================================================ */
.data-section { background: var(--bg-section-alt); }

.data-banner {
  display: flex; gap: 36px; align-items: flex-start;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  border-radius: var(--radius-xl);
  padding: 48px; margin-bottom: 28px;
  box-shadow: var(--shadow-xl);
}

.data-banner-icon {
  width: 80px; height: 80px;
  background: rgba(255,255,255,.18);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-light); font-size: 2.2rem; flex-shrink: 0;
}

.data-banner-content h3 { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.data-banner-content p  { color: rgba(255,255,255,.85); line-height: 1.8; margin-bottom: 28px; font-size: .95rem; }

.data-types { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }

.data-type-badge {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 50px;
  color: rgba(255,255,255,.95);
  font-size: .82rem; font-weight: 500;
  transition: all var(--transition);
}
.data-type-badge:hover { background: rgba(255,255,255,.25); }
.data-type-badge i { color: var(--accent-light); }

.data-cta {
  background: linear-gradient(135deg, var(--accent), #0077a8);
  box-shadow: 0 4px 20px rgba(0,150,199,.4);
  color: var(--white);
}
.data-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,150,199,.55); color: var(--white); }

.data-update-notice {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 18px;
  background: rgba(16,185,129,.08);
  border: 1px solid rgba(16,185,129,.2);
  border-radius: var(--radius-md);
  color: #065f46; font-size: .9rem; font-weight: 500;
}
.data-update-notice i { color: var(--success); }

/* ============================================================
   EXPERIMENTAL DATA — BULLETIN BOARD
   ============================================================ */
.data-section { background: var(--bg-section-alt); }

/* Controls (filter + search) */
.board-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.board-filter-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.board-filter {
  padding: 9px 16px;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: .88rem;
  color: var(--text-primary);
  background: var(--white);
  cursor: pointer;
  transition: border-color var(--transition);
}
.board-filter:focus { outline: none; border-color: var(--primary-light); }

.board-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.board-search-wrap i {
  position: absolute;
  left: 12px;
  color: var(--text-light);
  font-size: .88rem;
  pointer-events: none;
}

.board-search-wrap input {
  padding: 9px 14px 9px 36px;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: .88rem;
  width: 220px;
  transition: border-color var(--transition);
}
.board-search-wrap input:focus { outline: none; border-color: var(--primary-light); }

.board-total {
  font-size: .82rem;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

/* Table wrapper */
.board-wrap {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  overflow-x: auto;
  margin-bottom: 20px;
}

.board-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}

.board-table thead th {
  background: #f0f6ff;
  color: var(--text-primary);
  font-weight: 700;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  padding: 14px 16px;
  border-bottom: 2px solid var(--gray-200);
  text-align: left;
  white-space: nowrap;
}

.board-table tbody tr {
  border-bottom: 1px solid var(--gray-200);
  transition: background .15s;
  cursor: pointer;
}
.board-table tbody tr:last-child { border-bottom: none; }
.board-table tbody tr:hover { background: #f0f6ff; }

.board-table td { padding: 14px 16px; vertical-align: middle; }

/* Column widths */
.col-no     { width: 56px; color: var(--text-light); font-size: .82rem; text-align: center; }
.col-cat    { width: 140px; }
.col-title  { min-width: 220px; }
.col-author { width: 130px; color: var(--text-secondary); font-size: .85rem; }
.col-date   { width: 110px; color: var(--text-light); font-size: .83rem; white-space: nowrap; }
.col-views  { width: 70px; color: var(--text-light); font-size: .83rem; text-align: right; white-space: nowrap; }
.col-views i { font-size: .78rem; margin-right: 3px; }

/* Title link style */
.board-title-link {
  font-weight: 500;
  color: var(--text-primary);
  transition: color .2s;
}
.board-row:hover .board-title-link { color: var(--primary); }

.board-attach-icon {
  font-size: .75rem;
  color: var(--text-light);
  margin-left: 6px;
}

/* Category badges */
.board-badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  white-space: nowrap;
}
.cat-vhp       { background: #dbeafe; color: #1e40af; }
.cat-micro     { background: #d1fae5; color: #065f46; }
.cat-technical { background: #fef3c7; color: #92400e; }
.cat-news      { background: #ede9fe; color: #5b21b6; }
.cat-other     { background: #f1f5f9; color: #475569; }

/* Empty / loading state */
.board-loading,
.board-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-light);
  font-size: .9rem;
  line-height: 1.8;
}
.board-empty i { font-size: 2rem; display: block; margin-bottom: 10px; opacity: .45; }

/* Pagination */
.board-pagination { margin-top: 8px; margin-bottom: 4px; }
.board-pagination .pagination-inner { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.board-pagination .page-btn {
  min-width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  background: var(--white);
  color: var(--text-secondary);
  font-size: .85rem;
  cursor: pointer;
  transition: all .2s;
  padding: 0 10px;
}
.board-pagination .page-btn:hover:not([disabled]) { border-color: var(--primary-light); color: var(--primary-light); }
.board-pagination .page-btn.active { background: var(--primary); border-color: var(--primary); color: var(--white); font-weight: 700; }
.board-pagination .page-btn[disabled] { opacity: .4; cursor: not-allowed; }
.board-pagination .page-ellipsis { color: var(--text-light); padding: 0 4px; }

/* ── POST DETAIL MODAL ── */
.board-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,30,80,.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 900;
  padding: 20px;
  backdrop-filter: blur(4px);
}
.board-modal-overlay.active { display: flex; }

.board-modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 720px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.board-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--gray-200);
  background: #f5f9ff;
  flex-shrink: 0;
}

.modal-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-category {
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  background: #dbeafe;
  color: #1e40af;
}

.modal-date {
  font-size: .8rem;
  color: var(--text-light);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.1rem;
  color: var(--text-light);
  cursor: pointer;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  transition: background .2s, color .2s;
}
.modal-close:hover { background: var(--gray-200); color: var(--text-primary); }

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 20px 28px 8px;
  flex-shrink: 0;
}

.modal-info-row {
  display: flex;
  gap: 20px;
  padding: 0 28px 16px;
  font-size: .82rem;
  color: var(--text-secondary);
  flex-shrink: 0;
  border-bottom: 1px solid var(--gray-200);
}
.modal-info-row i { margin-right: 5px; }

.modal-content {
  padding: 20px 28px;
  overflow-y: auto;
  flex: 1;
  color: var(--text-secondary);
  line-height: 1.85;
  font-size: .93rem;
}
.modal-content p { margin-bottom: 12px; }
.modal-content p:last-child { margin-bottom: 0; }

.modal-file {
  padding: 0 28px 16px;
  flex-shrink: 0;
}
.modal-file-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity .2s;
}
.modal-file-link:hover { opacity: .88; }

/* ── Modal Media Gallery ── */
.modal-media {
  padding: 0 28px 16px;
  flex-shrink: 0;
}

.modal-media-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.modal-media-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  background: var(--gray-100);
}

.modal-media-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
  transition: transform .3s ease;
}
.modal-media-img:hover { transform: scale(1.03); }

.modal-media-video {
  width: 100%;
  max-height: 240px;
  display: block;
  background: #000;
}

.modal-media-label {
  font-size: .76rem;
  color: var(--text-secondary);
  padding: 6px 10px;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  gap: 6px;
}
.modal-media-label i { color: var(--primary-light); }

/* ── Lightbox ── */
.board-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
}
.board-lightbox.active { display: flex; }

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.88);
  cursor: pointer;
}

.lightbox-inner {
  position: relative;
  z-index: 1;
  max-width: 92vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
  object-fit: contain;
  animation: lightboxIn .2s ease;
}

@keyframes lightboxIn {
  from { opacity: 0; transform: scale(.93); }
  to   { opacity: 1; transform: scale(1); }
}

.lightbox-close {
  position: absolute;
  top: -44px; right: 0;
  width: 36px; height: 36px;
  background: rgba(255,255,255,.15);
  border: 1.5px solid rgba(255,255,255,.3);
  border-radius: 50%;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}
.lightbox-close:hover { background: rgba(255,255,255,.3); }

.modal-footer {
  padding: 16px 28px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  flex-shrink: 0;
  background: #f5f9ff;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-section { background: var(--white); }

.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: start; }

.contact-info h3, .contact-form h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem; font-weight: 700;
  margin-bottom: 28px; color: var(--text-primary);
}

.contact-item { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }

.ci-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: 1rem; flex-shrink: 0;
}

.contact-item strong { display: block; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; font-size: .9rem; }
.contact-item p { color: var(--text-secondary); font-size: .9rem; line-height: 1.6; }
.contact-item a { color: var(--primary); }
.contact-item a:hover { color: var(--primary-dark); }

.contact-form {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: inherit; font-size: .9rem;
  color: var(--text-primary); background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(17,85,168,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-feedback {
  margin-top: 16px; padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: .88rem; font-weight: 500; display: none;
}
.form-feedback.success { background: rgba(16,185,129,.1); color: #065f46; border: 1px solid rgba(16,185,129,.3); display: block; }
.form-feedback.error   { background: rgba(239,68,68,.1);  color: #991b1b; border: 1px solid rgba(239,68,68,.3);  display: block; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--bg-dark-footer); color: rgba(255,255,255,.7); }

.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px; padding: 64px 24px 48px;
}

/* Footer logo image — 흰 배경 유지, 어두운 footer 위에 잘 보이도록 */
.footer-logo-img {
  height: 48px; width: auto;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  padding: 4px 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
  margin-bottom: 12px;
}

.footer-brand p { font-size: .84rem; margin-top: 4px; line-height: 1.6; color: rgba(255,255,255,.5); max-width: 240px; }

.footer h4 {
  font-family: var(--font-heading); font-size: .85rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--white); margin-bottom: 16px;
}

.footer-links ul, .footer-products ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a, .footer-products a { font-size: .88rem; color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-links a:hover, .footer-products a:hover { color: var(--accent-light); }

.footer-contact p { display: flex; align-items: center; gap: 10px; font-size: .88rem; margin-bottom: 10px; }
.footer-contact i { color: var(--accent-light); width: 16px; }
.footer-contact a { color: rgba(255,255,255,.6); }
.footer-contact a:hover { color: var(--accent-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  text-align: center; padding: 24px;
  font-size: .82rem; color: rgba(255,255,255,.4);
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden;
  transition: all var(--transition); z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover   { transform: translateY(-4px); box-shadow: var(--shadow-xl); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .model-grid    { grid-template-columns: repeat(2,1fr); }
  .about-grid    { grid-template-columns: 1fr; gap: 40px; }
  .about-cards   { grid-template-columns: repeat(2,1fr); }
  .footer-inner  { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 900px) {
  .services-grid  { grid-template-columns: 1fr; }
  .isolator-grid  { grid-template-columns: 1fr; gap: 16px; }
  .sp-features    { grid-template-columns: repeat(2,1fr); }
  .contact-grid   { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  .hamburger { display: flex; }

  .nav-links {
    position: fixed; top: 80px; right: 0;
    width: 280px; height: calc(100vh - 80px);
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(20px);
    flex-direction: column; align-items: flex-start;
    padding: 32px 24px; gap: 8px;
    transform: translateX(100%);
    transition: transform var(--transition);
    box-shadow: -4px 0 24px rgba(17,85,168,.12);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { width: 100%; padding: 12px 16px; color: var(--text-primary); }

  .hero-actions { flex-direction: column; }
  .hero-stats   { gap: 16px; }

  .product-tabs { flex-direction: column; border-bottom: none; gap: 4px; }
  .tab-btn { border-radius: var(--radius-sm); border: 2px solid var(--gray-200); bottom: 0; }
  .tab-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

  .model-grid  { grid-template-columns: 1fr; }
  .sp-features { grid-template-columns: 1fr; }

  .data-banner { flex-direction: column; gap: 24px; padding: 32px 24px; }

  .form-row       { grid-template-columns: 1fr; }
  .contact-form   { padding: 28px 20px; }

  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand p { max-width: 100%; }
}

@media (max-width: 480px) {
  .section-title { font-size: 1.7rem; }
  .hero-title    { font-size: 2rem; }
  .about-cards   { grid-template-columns: 1fr; }
  .back-to-top   { bottom: 20px; right: 20px; }
  .logo-img      { height: 42px; }
}