/* =============================================
   GNS SIGN — Design System
   ============================================= */

:root {
  --bg:          #FFFFFF;
  --dark:        #334155;
  --dark-deep:   #1e293b;
  --accent:      #06B6D4;
  --accent-dim:  rgba(6, 182, 212, 0.15);
  --accent-glow: rgba(6, 182, 212, 0.5);
  --text:        #111827;
  --text-mid:    #374151;
  --text-light:  #64748B;
  --white:       #ffffff;
  --border:      rgba(51, 65, 85, 0.12);

  --pad-section: clamp(72px, 10vw, 128px);
  --pad-section-sm: clamp(48px, 6vw, 80px);
  --container:   min(1180px, 100% - clamp(32px, 5vw, 80px));
  --gap:         clamp(16px, 2.5vw, 32px);
  --radius:      8px;
  --radius-lg:   16px;
  --transition:  0.32s cubic-bezier(0.4, 0, 0.2, 1);

  --header-h:    68px;
  --font-base:   'Noto Sans KR', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Mono', 'Courier New', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-base);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.section-title {
  font-size: clamp(26px, 3.5vw, 42px);
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-title.on-dark { color: var(--white); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
  font-family: var(--font-mono);
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
}

@keyframes dot-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.container { width: var(--container); margin-inline: auto; }

#site-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(250,250,250,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow var(--transition), background var(--transition);
}
#site-header.scrolled { box-shadow: 0 2px 20px rgba(51,65,85,0.08); }

.header-inner {
  width: var(--container); margin-inline: auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}

.site-logo { display: flex; align-items: center; flex-shrink: 0; }
.logo-svg { height: 34px; width: auto; }

.site-nav { display: flex; align-items: center; gap: clamp(20px,3vw,40px); }
.site-nav a {
  font-size: 14px; font-weight: 500; color: var(--text-mid);
  letter-spacing: 0.02em; position: relative; padding: 4px 0;
  transition: color var(--transition);
}
.site-nav a::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 100%;
  height: 1.5px; background: var(--accent); transition: right var(--transition);
}
.site-nav a:hover { color: var(--dark); }
.site-nav a:hover::after { right: 0; }

.nav-cta-btn {
  font-size: 13px; font-weight: 700; padding: 9px 22px;
  border: 1.5px solid var(--accent); border-radius: 5px;
  color: var(--dark); letter-spacing: 0.05em;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.nav-cta-btn:hover { background: var(--accent); color: var(--white); box-shadow: 0 0 16px var(--accent-glow); }

.menu-toggle {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 36px; height: 36px; padding: 4px;
}
.menu-toggle span { display: block; height: 2px; background: var(--dark); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none; position: fixed; top: var(--header-h); left: 0; right: 0;
  background: var(--white); border-bottom: 1px solid var(--border);
  padding: 20px 0; z-index: 999;
  transform: translateY(-100%); opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
}
.mobile-nav.open { transform: translateY(0); opacity: 1; }
.mobile-nav ul { padding: 0 clamp(20px,5vw,40px); display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a { display: block; padding: 12px 0; font-size: 16px; font-weight: 500; color: var(--text-mid); border-bottom: 1px solid var(--border); transition: color var(--transition); }
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--accent); }

/* ── Hero 공통 ── */
#hero { margin-top: var(--header-h); }
#hero .slider-wrap { aspect-ratio: unset !important; border-radius: 0; }
#hero .slide img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
.hero-h1 { font-size: clamp(38px,6vw,72px); font-weight: 900; line-height: 1.1; letter-spacing: -0.03em; }
.hero-sub { font-size: clamp(14px,1.6vw,16px); line-height: 1.8; max-width: 480px; }

/* ── Hero PC (769px 이상) ── */
@media (min-width: 769px) {
  #hero {
    position: relative;
    height: calc(100vh - var(--header-h));
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }
  .hero-slider-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 1;
  }
  #hero .slider-wrap { position: absolute; top: 0; left: 0; right: 0; bottom: 0; }
  #hero .slide { height: 100%; }
  .hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 2;
    background: linear-gradient(to top, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.4) 45%, transparent 100%);
    pointer-events: none;
  }
  .hero-content {
    position: relative;
    z-index: 3;
    padding: 0 clamp(20px,5vw,80px) clamp(48px,6vw,80px);
    max-width: 780px;
    display: flex; flex-direction: column; align-items: flex-start; gap: 20px;
  }
  .hero-h1 { color: var(--white); }
  .hero-sub { color: rgba(255,255,255,0.78); }
}

.cta-primary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 30px; background: var(--accent); color: var(--white);
  font-size: 15px; font-weight: 700; letter-spacing: 0.03em;
  border-radius: 6px; border: 2px solid var(--accent);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.cta-primary:hover { background: transparent; color: var(--accent); }

.cta-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 30px; background: transparent; color: var(--white);
  font-size: 15px; font-weight: 700; letter-spacing: 0.03em;
  border-radius: 6px; border: 2px solid var(--white); text-decoration: none;
  transition: background var(--transition), color var(--transition);
}
.cta-secondary:hover { background: var(--white); color: var(--dark); }

.section { padding-block: var(--pad-section); }
.section.sm { padding-block: var(--pad-section-sm); }
.section.dark { background: var(--dark); color: var(--white); }
.section.dark-deep { background: var(--dark-deep); color: var(--white); }
.section-head { margin-bottom: clamp(40px,6vw,72px); }

/* Local pages cards */
.local-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 360px)); gap: var(--gap); margin-top: clamp(24px,3vw,40px); }
.local-card { display: block; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); transition: transform var(--transition), box-shadow var(--transition); text-decoration: none; }
.local-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.10); }
.local-card-img { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.local-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.local-card:hover .local-card-img img { transform: scale(1.04); }
@keyframes pan-ltr { 0% { transform: translateX(0); } 100% { transform: translateX(-44%); } }
.img-pan { position: absolute !important; top: -10% !important; left: 0 !important; width: 200% !important; height: auto !important; max-width: none !important; object-fit: unset !important; animation: pan-ltr 3.5s ease-in-out infinite alternate; }
.local-card:hover .img-pan { transform: none; }
.local-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,23,42,0.5) 0%, transparent 60%); }
.local-card-body { padding: 20px 22px 22px; background: var(--bg); }
.local-card-region { font-size: 11px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); font-family: var(--font-mono); margin-bottom: 6px; }
.local-card-title { font-size: clamp(17px,1.8vw,20px); font-weight: 900; color: var(--text); letter-spacing: -0.02em; line-height: 1.2; }
.local-card-link { display: inline-flex; align-items: center; gap: 5px; margin-top: 12px; font-size: 13px; font-weight: 700; color: var(--accent); }

/* ── Pain Point ── */
.section-sub { margin-top: 16px; font-size: clamp(14px,1.6vw,16px); color: var(--text-light); line-height: 1.75; }
.pain-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--gap); margin-top: clamp(40px,5vw,64px); }
@media (max-width: 768px) { .pain-grid { grid-template-columns: 1fr; } }
.pain-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(24px,3vw,36px);
  display: flex; flex-direction: column; gap: 16px;
  background: var(--bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.pain-card:hover { border-color: rgba(6,182,212,0.4); box-shadow: 0 8px 24px rgba(6,182,212,0.08); }
.pain-q { font-size: 28px; font-weight: 900; color: var(--accent); font-family: var(--font-mono); line-height: 1; }
.pain-card-text { font-size: clamp(15px,1.6vw,17px); font-weight: 600; color: var(--text); line-height: 1.6; }

/* ── Media Slider ── */
#media-slider { position: relative; width: 100%; aspect-ratio: 16/9; overflow: hidden; background: #000; }
.media-track { position: relative; width: 100%; height: 100%; }
.media-slide {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0; z-index: 1;
  transform: scale(1.06);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.media-slide.active { opacity: 1; z-index: 2; transform: scale(1); }
.media-slide.prev   { opacity: 1; z-index: 1; transform: scale(1); transition: none; }
.media-slide img { width: 100%; height: 100%; object-fit: cover; display: block; transform-origin: center center; }

/* Ken Burns — 빠르고 과감한 카메라 무브먼트 */
@keyframes kb-zoom-in  { from { transform: scale(1);             } to { transform: scale(1.15);            } }
@keyframes kb-pan-rtl  { from { transform: scale(1.12) translateX(5%);  } to { transform: scale(1.12) translateX(-5%);  } }
@keyframes kb-zoom-out { from { transform: scale(1.15);           } to { transform: scale(1);              } }
@keyframes kb-pan-ltr  { from { transform: scale(1.12) translateX(-5%); } to { transform: scale(1.12) translateX(5%);   } }
@keyframes kb-diagonal { from { transform: scale(1)    translate(-3%,-2%); } to { transform: scale(1.15) translate(3%,2%); } }

.media-slide:nth-child(1).active img { animation: kb-zoom-in  3s ease-in-out forwards; }
.media-slide:nth-child(2).active img { animation: kb-pan-rtl  3s ease-in-out forwards; }
.media-slide:nth-child(3).active img { animation: kb-zoom-out 3s ease-in-out forwards; }
.media-slide:nth-child(4).active img { animation: kb-pan-ltr  3s ease-in-out forwards; }
.media-slide:nth-child(5).active img { animation: kb-diagonal 3s ease-in-out forwards; }

@media (max-width: 768px) { #media-slider { aspect-ratio: 4/3; } }

/* ── Why GNS ── */
.whyus-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--gap); margin-top: clamp(40px,5vw,64px); }
@media (max-width: 768px) { .whyus-grid { grid-template-columns: 1fr; } }
.whyus-card {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: clamp(24px,3vw,36px);
  display: flex; flex-direction: column; gap: 16px;
  transition: border-color var(--transition);
}
.whyus-card:hover { border-color: rgba(6,182,212,0.5); }
.whyus-num { font-size: 12px; font-weight: 700; letter-spacing: 0.15em; color: var(--accent); font-family: var(--font-mono); }
.whyus-card-title { font-size: clamp(16px,1.8vw,19px); font-weight: 800; color: var(--white); line-height: 1.4; }
.whyus-card-desc { font-size: clamp(13px,1.4vw,15px); color: rgba(255,255,255,0.6); line-height: 1.8; }
.whyus-card-desc strong { color: var(--accent); font-weight: 700; }

#cases { background: var(--bg); padding-block: var(--pad-section); }
.cases-header { margin-bottom: clamp(48px,7vw,88px); }

.case-block { padding-block: clamp(48px,7vw,80px); border-top: 1px solid var(--border); }
.case-block:last-of-type { border-bottom: 1px solid var(--border); }
.case-layout { display: flex; flex-direction: column; gap: 0; }
.case-slider-col { display: flex; flex-direction: column; gap: 12px; }
.case-info-col { display: flex; flex-direction: column; gap: 8px; padding-top: 20px; }

.case-detail-link {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 4px;
  font-size: 13px; font-weight: 700; color: var(--accent);
  letter-spacing: 0.02em; transition: gap 0.2s;
}
.case-detail-link:hover { gap: 10px; }

.slider-wrap { position: relative; overflow: hidden; border-radius: var(--radius-lg); background: transparent; aspect-ratio: 16/9; }
@media (max-width: 600px) { .slider-wrap { aspect-ratio: 4/3; } }
.slider-track { display: flex; height: 100%; transition: transform 0.5s cubic-bezier(0.4,0,0.2,1); }
.slide { min-width: 100%; height: 100%; position: relative; overflow: hidden; }
.slide img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }

.slider-dots { display: flex; justify-content: center; gap: 8px; margin-top: 16px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--dark); transition: background var(--transition), box-shadow var(--transition); cursor: pointer; }
.dot.active { background: var(--accent); box-shadow: 0 0 8px var(--accent-glow); }

.caption-title { font-size: clamp(18px,2.2vw,24px); font-weight: 800; color: var(--dark); line-height: 1.35; letter-spacing: -0.02em; }
.caption-desc { font-size: 14px; color: var(--text-light); line-height: 1.8; }

.cases-footer { display: flex; justify-content: center; margin-top: clamp(48px,7vw,88px); }

.btn-outline-accent {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
  border: 1.5px solid var(--accent); border-radius: 6px;
  font-size: 14px; font-weight: 700; letter-spacing: 0.05em; color: var(--accent);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-outline-accent:hover { background: var(--accent); color: var(--white); box-shadow: 0 0 20px rgba(6,182,212,0.5); transform: translateY(-2px); }

.btn-outline-light {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
  border: 1.5px solid var(--white); border-radius: 6px;
  font-size: 14px; font-weight: 700; letter-spacing: 0.05em; color: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-outline-light:hover { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 16px rgba(6,182,212,0.3); transform: translateY(-2px); }

.btn-dark {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
  background: var(--dark); border-radius: 6px; font-size: 14px; font-weight: 700;
  letter-spacing: 0.05em; color: var(--white); border: 1.5px solid var(--dark);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-dark:hover { background: var(--dark-deep); box-shadow: 0 6px 24px rgba(30,41,59,0.3); transform: translateY(-2px); }
.btn-arrow { width: 16px; height: 16px; flex-shrink: 0; }

#brand { padding-block: var(--pad-section); background: #EEF2F6; position: relative; overflow: hidden; }
.brand-grid { display: block; max-width: 680px; }
.brand-copy { display: flex; flex-direction: column; gap: 28px; }
.brand-headline { font-size: clamp(28px,4vw,50px); font-weight: 900; line-height: 1.18; letter-spacing: -0.03em; color: var(--dark); }
.brand-headline em { font-style: normal; color: var(--accent); }
.brand-keywords { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.brand-keywords li { font-size: 13px; font-weight: 700; letter-spacing: 0.08em; color: var(--accent); border: 1.5px solid var(--accent); border-radius: 4px; padding: 6px 14px; }
.brand-body { font-size: clamp(16px,1.8vw,20px); font-weight: 600; line-height: 1.6; color: var(--dark); }
.brand-accent-bar { width: 48px; height: 3px; background: var(--accent); border-radius: 2px; box-shadow: 0 0 10px var(--accent-glow); }

#solutions { padding-block: var(--pad-section); background: var(--bg); }
.solutions-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--gap); }
@media (max-width: 640px) { .solutions-grid { grid-template-columns: 1fr; } }
@media (min-width: 900px) { .solutions-grid { grid-template-columns: repeat(4,1fr); gap: clamp(12px,2vw,24px); } }

.solution-card {
  display: flex; flex-direction: column; background: var(--white);
  border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none; color: inherit;
}
.solution-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(51,65,85,0.1); border-color: rgba(6,182,212,0.3); }
.solution-card:hover .sol-image-inner { transform: scale(1.04); }
.solution-card:hover .sol-arrow { transform: translateX(4px); color: var(--accent); }

.sol-image { width: 100%; aspect-ratio: 4/3; overflow: hidden; background: var(--dark); position: relative; }
.sol-image-inner { width: 100%; height: 100%; transition: transform 0.5s ease; display: flex; align-items: center; justify-content: center; position: relative; }
.sol-ph-1 { background: linear-gradient(135deg,#1e293b 0%,#334155 100%); }
.sol-ph-2 { background: linear-gradient(135deg,#0f172a 0%,#1e2d45 100%); }
.sol-ph-3 { background: linear-gradient(135deg,#162031 0%,#243347 100%); }
.sol-ph-4 { background: linear-gradient(135deg,#0c1a28 0%,#1e3350 100%); }
.sol-slides { position: absolute; inset: 0; overflow: hidden; }
.sol-slide { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.9s ease; }
.sol-slide.active { opacity: 1; }
.sol-body { padding: 22px 22px 26px; display: flex; flex-direction: column; flex: 1; }
.sol-name { font-size: 16px; font-weight: 800; color: var(--dark); letter-spacing: -0.01em; margin-bottom: 8px; }
.sol-desc { font-size: 13px; color: var(--text-light); line-height: 1.7; flex: 1; }
.sol-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; font-size: 12px; font-weight: 700; letter-spacing: 0.08em; color: var(--text-light); transition: color var(--transition); }
.sol-arrow { width: 14px; height: 14px; transition: transform var(--transition), color var(--transition); }

#faq { padding-block: var(--pad-section); background: var(--dark); }
.faq-layout { display: grid; grid-template-columns: 1fr 2fr; gap: clamp(40px,6vw,96px); align-items: start; }
@media (max-width: 768px) { .faq-layout { grid-template-columns: 1fr; } }
.faq-intro { position: sticky; top: calc(var(--header-h) + 32px); }
.faq-list { display: flex; flex-direction: column; gap: 2px; }
.faq-item { border-bottom: 1px solid rgba(6,182,212,0.1); }
.faq-question {
  width: 100%; text-align: left; padding: 22px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-size: clamp(15px,1.8vw,17px); font-weight: 600; color: var(--white);
  cursor: pointer; transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question.active { color: var(--accent); }
.faq-icon { flex-shrink: 0; width: 20px; height: 20px; position: relative; color: var(--accent); opacity: 0.6; transition: opacity var(--transition), transform var(--transition); }
.faq-question.active .faq-icon { opacity: 1; transform: rotate(45deg); }
.faq-icon::before, .faq-icon::after { content: ''; position: absolute; background: currentColor; border-radius: 1px; }
.faq-icon::before { width: 2px; height: 14px; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.faq-icon::after { width: 14px; height: 2px; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.faq-answer { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.35s ease; }
.faq-answer.open { grid-template-rows: 1fr; }
.faq-answer-inner { overflow: hidden; padding-bottom: 0; transition: padding-bottom 0.35s ease; }
.faq-answer.open .faq-answer-inner { padding-bottom: 22px; }
.faq-answer-inner p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); }

#contact-cta { padding-top: 8px; padding-bottom: clamp(48px,6vw,72px); background: var(--dark); }
.cta-card { display: grid; grid-template-columns: 1fr auto; gap: clamp(24px,4vw,64px); align-items: center; }
@media (max-width: 640px) { .cta-card { grid-template-columns: 1fr; text-align: center; align-items: start; } .cta-card-action { justify-self: center; } }
.cta-card-text { position: relative; }
.cta-card-title { font-size: clamp(22px,3vw,36px); font-weight: 900; color: var(--white); line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 14px; }
.cta-card-desc { font-size: 15px; color: rgba(255,255,255,0.55); line-height: 1.7; }
.cta-card-action { position: relative; z-index: 1; flex-shrink: 0; display: flex; flex-direction: column; gap: 12px; }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(15,23,42,0.75); backdrop-filter: blur(6px);
  z-index: 2000; display: flex; align-items: center; justify-content: center; padding: 20px;
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal-box { background: var(--white); border-radius: var(--radius-lg); padding: clamp(32px,5vw,56px); width: 100%; max-width: 440px; transform: translateY(20px) scale(0.97); transition: transform var(--transition); position: relative; }
.modal-overlay.active .modal-box { transform: translateY(0) scale(1); }
.modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; color: var(--text-light); transition: background var(--transition), color var(--transition); }
.modal-close:hover { background: rgba(100,116,139,0.1); color: var(--dark); }
.modal-title { font-size: 22px; font-weight: 800; color: var(--dark); margin-bottom: 8px; letter-spacing: -0.02em; }
.modal-sub { font-size: 14px; color: var(--text-light); margin-bottom: 32px; line-height: 1.6; }
.modal-actions { display: flex; flex-direction: column; gap: 12px; }
.modal-btn { display: flex; align-items: center; gap: 14px; padding: 16px 22px; border-radius: var(--radius); font-size: 15px; font-weight: 700; transition: background var(--transition), box-shadow var(--transition), transform var(--transition); text-decoration: none; }
.modal-btn:hover { transform: translateY(-2px); }
.modal-btn-icon { width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.modal-btn-icon svg { width: 22px; height: 22px; }
.modal-btn.call { background: var(--accent); color: var(--white); }
.modal-btn.call:hover { box-shadow: 0 8px 24px rgba(6,182,212,0.5); background: #0891b2; }
.modal-btn.call .modal-btn-icon { background: rgba(255,255,255,0.2); color: var(--white); }
.modal-btn.sms { background: var(--dark); color: var(--white); }
.modal-btn.sms:hover { box-shadow: 0 8px 24px rgba(51,65,85,0.3); background: var(--dark-deep); }
.modal-btn.sms .modal-btn-icon { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.8); }
.modal-btn-info { display: flex; flex-direction: column; gap: 2px; }
.modal-btn-label { font-size: 13px; opacity: 0.7; font-weight: 500; }
.modal-btn-num { font-family: var(--font-mono); font-size: 17px; letter-spacing: 0.05em; }
.modal-note { margin-top: 20px; font-size: 12px; color: var(--text-light); text-align: center; line-height: 1.6; }

#site-footer { background: var(--dark-deep); padding-block: clamp(40px,6vw,64px); border-top: 1px solid rgba(6,182,212,0.1); }
.footer-inner { width: var(--container); margin-inline: auto; display: flex; flex-direction: column; gap: 40px; }
.footer-top { display: grid; grid-template-columns: auto 1fr; gap: 48px; align-items: start; }
@media (max-width: 640px) { .footer-top { grid-template-columns: 1fr; gap: 32px; } }
.footer-logo .logo-svg { height: 27px; filter: brightness(0.8); }
.footer-sitemap { display: flex; flex-wrap: wrap; gap: clamp(16px,3vw,32px); justify-content: flex-end; }
@media (max-width: 640px) { .footer-sitemap { justify-content: flex-start; } }
.sitemap-item { display: flex; flex-direction: column; align-items: center; gap: 8px; text-decoration: none; transition: transform var(--transition); }
.sitemap-item:hover { transform: translateY(-4px); }
.sitemap-icon { width: 44px; height: 44px; border-radius: var(--radius); background: rgba(255,255,255,0.05); border: 1px solid rgba(6,182,212,0.15); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition); }
.sitemap-item:hover .sitemap-icon { background: rgba(6,182,212,0.1); border-color: var(--accent); color: var(--accent); box-shadow: 0 0 12px rgba(6,182,212,0.25); }
.sitemap-icon svg { width: 20px; height: 20px; }
.sitemap-label { font-size: 10px; letter-spacing: 0.08em; color: rgba(255,255,255,0.3); text-align: center; white-space: nowrap; transition: color var(--transition); }
.sitemap-item:hover .sitemap-label { color: rgba(255,255,255,0.6); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-info { font-size: 11px; color: rgba(255,255,255,0.25); line-height: 1.6; }
.footer-info span + span::before { content: ' · '; opacity: 0.5; }
.footer-copy { font-size: 11px; color: rgba(255,255,255,0.18); font-family: var(--font-mono); }

.subpage-hero { background: var(--dark-deep); padding-top: calc(var(--header-h) + clamp(48px,8vw,96px)); padding-bottom: clamp(48px,8vw,96px); position: relative; overflow: hidden; }
.subpage-title { font-size: clamp(30px,5vw,60px); font-weight: 900; color: var(--white); letter-spacing: -0.03em; line-height: 1.1; }
.subpage-desc { margin-top: 20px; font-size: clamp(15px,1.8vw,18px); color: rgba(255,255,255,0.55); line-height: 1.75; max-width: 560px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 24px; }
.breadcrumb a { font-size: 12px; color: rgba(255,255,255,0.35); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { width: 4px; height: 4px; background: rgba(255,255,255,0.2); border-radius: 50%; }
.breadcrumb-current { font-size: 12px; color: var(--accent); }

.cases-subpage-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(320px,100%),1fr)); gap: var(--gap); }
.case-card { display: flex; flex-direction: column; border-radius: var(--radius-lg); overflow: hidden; background: var(--white); border: 1px solid var(--border); transition: transform var(--transition), box-shadow var(--transition); text-decoration: none; color: inherit; }
.case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(51,65,85,0.1); }
.case-thumb { width: 100%; aspect-ratio: 16/10; background: var(--dark); position: relative; overflow: hidden; }
.case-info { padding: 20px 22px 24px; }
.case-tag { display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; font-family: var(--font-mono); }
.case-name { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.case-location { font-size: 13px; color: var(--text-light); display: flex; align-items: center; gap: 6px; }
.case-location svg { width: 12px; height: 12px; }

.sol-detail-section { padding-block: var(--pad-section); }
.sol-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px,6vw,96px); align-items: center; }
@media (max-width: 768px) { .sol-detail-grid { grid-template-columns: 1fr; } }
.sol-detail-visual { aspect-ratio: 4/3; background: var(--dark); border-radius: var(--radius-lg); overflow: hidden; position: relative; }
.sol-detail-visual img { width: 100%; height: 100%; object-fit: cover; }
.sol-detail-steps { margin-top: 40px; display: flex; flex-direction: column; gap: 20px; }
.sol-step { display: flex; gap: 16px; align-items: flex-start; }
.sol-step-num { flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%; border: 1.5px solid var(--accent); display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--accent); margin-top: 2px; }
.sol-step-text h4 { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.sol-step-text p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

.contact-page-wrap { padding-block: var(--pad-section); }
.contact-methods { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(300px,100%),1fr)); gap: var(--gap); max-width: 720px; margin-inline: auto; }
.contact-method-card { display: flex; flex-direction: column; align-items: center; text-align: center; padding: clamp(36px,5vw,60px) clamp(24px,4vw,48px); border-radius: var(--radius-lg); text-decoration: none; transition: transform var(--transition), box-shadow var(--transition); }
.contact-method-card:hover { transform: translateY(-6px); }
.contact-method-card.call-card { background: var(--accent); color: var(--white); }
.contact-method-card.call-card:hover { box-shadow: 0 16px 40px rgba(6,182,212,0.5); }
.contact-method-card.sms-card { background: var(--dark); color: var(--white); }
.contact-method-card.sms-card:hover { box-shadow: 0 16px 40px rgba(51,65,85,0.35); }
.contact-method-icon { width: 64px; height: 64px; margin-bottom: 24px; }
.contact-method-type { font-size: 11px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 10px; opacity: 0.75; font-family: var(--font-mono); }
.contact-method-num { font-family: var(--font-mono); font-size: clamp(22px,3.5vw,32px); font-weight: 700; letter-spacing: 0.05em; margin-bottom: 10px; }
.contact-method-note { font-size: 13px; opacity: 0.65; line-height: 1.6; }

.sitemap-page { padding-block: var(--pad-section); }
.sitemap-section-title { font-size: 13px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; font-family: var(--font-mono); }
.sitemap-links { display: flex; flex-direction: column; gap: 8px; margin-bottom: 40px; }
.sitemap-links a { font-size: 17px; font-weight: 500; color: var(--dark); padding: 12px 0; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; transition: color var(--transition), padding-left var(--transition); }
.sitemap-links a:hover { color: var(--accent); padding-left: 8px; }

.value-card { padding: 28px 24px; background: var(--white); border-radius: var(--radius-lg); border-left: 3px solid var(--accent); box-shadow: 0 4px 20px rgba(51,65,85,0.06); }
.value-card .value-num { display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em; color: var(--accent); margin-bottom: 12px; }
.value-card .value-title { font-size: 18px; font-weight: 800; color: var(--dark); margin-bottom: 10px; }
.value-card .value-desc { font-size: 14px; color: var(--text-light); line-height: 1.75; }

.case-detail-hero { position: relative; min-height: clamp(320px,50vw,560px); overflow: hidden; padding-top: var(--header-h); display: flex; align-items: flex-end; }
.case-hero-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.case-hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, #1e293b 0%, #1e293b 20%, transparent 70%); }
.case-hero-content { position: relative; z-index: 2; width: var(--container); margin-inline: auto; padding-bottom: clamp(36px,5vw,60px); }
.case-hero-tag { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); font-family: var(--font-mono); margin-bottom: 16px; }
.case-hero-title { font-size: clamp(26px,4vw,48px); font-weight: 900; color: var(--white); line-height: 1.15; letter-spacing: -0.02em; }
.case-hero-sub { margin-top: 10px; font-size: clamp(14px,1.6vw,18px); color: rgba(255,255,255,0.6); font-weight: 400; }

.case-detail-intro { padding-block: clamp(56px,8vw,96px); background: var(--bg); }
.case-detail-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px,6vw,96px); align-items: start; }
@media (max-width: 768px) { .case-detail-intro-grid { grid-template-columns: 1fr; } }
.case-intro-title { font-size: clamp(22px,3vw,34px); font-weight: 900; color: var(--dark); line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 20px; }
.case-intro-desc { font-size: clamp(14px,1.5vw,16px); color: var(--text-light); line-height: 1.9; }
.case-specs-list { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--border); }
.case-spec-row { display: grid; grid-template-columns: 120px 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.case-spec-label { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; font-family: var(--font-mono); padding-top: 2px; }
.case-spec-value { font-size: 15px; font-weight: 600; color: var(--dark); }

.case-gallery { padding-block: clamp(56px,8vw,96px); background: #EEF2F6; }
.case-gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(380px,100%),1fr)); gap: var(--gap); margin-top: clamp(32px,4vw,48px); }
.case-gallery-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; border-radius: var(--radius-lg); display: block; transition: transform var(--transition); }
.case-gallery-img:hover { transform: scale(1.02); }

/* ── Case Related Section ── */
.case-related-section { padding-block: clamp(56px,8vw,96px); background: var(--bg); }
.case-related-title { font-size: clamp(20px,2.5vw,32px); font-weight: 900; color: var(--dark); letter-spacing: -0.02em; margin-block: 12px 40px; }
.case-related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--gap); }
.case-related-card { display: block; text-decoration: none; border-radius: var(--radius-lg); overflow: hidden; background: var(--white); border: 1px solid var(--border); transition: transform var(--transition), box-shadow var(--transition); }
.case-related-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.10); }
.case-related-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.case-related-info { padding: 20px 22px; }
.case-related-name { font-size: 15px; font-weight: 800; color: var(--dark); margin-bottom: 6px; line-height: 1.5; }
.case-related-desc { font-size: 13px; color: var(--text-light); }
@media (max-width: 768px) { .case-related-grid { grid-template-columns: 1fr; } }

.case-detail-cta { padding-block: clamp(56px,8vw,96px); background: var(--dark); text-align: center; }
.case-detail-cta .section-label { justify-content: center; }
.case-cta-title { font-size: clamp(22px,3vw,36px); font-weight: 900; color: var(--white); letter-spacing: -0.02em; margin-block: 16px 32px; line-height: 1.3; }
.case-cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── Case Landing Page additions ── */
.case-hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

.case-detail-body { padding-block: clamp(56px,8vw,96px); background: var(--bg); }
.case-detail-body-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(48px,6vw,96px); align-items: center; }
.case-detail-body-img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius-lg); }
.case-feature-list { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-direction: column; gap: 14px; }
.case-feature-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--text-light); line-height: 1.7; }
.case-feature-list li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; margin-top: 9px; }

.case-why-section { padding-block: clamp(56px,8vw,96px); background: var(--dark); }
.case-why-section .section-label { color: rgba(255,255,255,0.35); }
.case-why-title { font-size: clamp(22px,3vw,36px); font-weight: 900; color: var(--white); letter-spacing: -0.02em; margin-block: 12px 48px; }
.case-why-cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.case-why-card { padding: 32px 28px; border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); }
.case-why-num { font-size: 11px; font-weight: 700; color: var(--accent); font-family: var(--font-mono); letter-spacing: 0.18em; margin-bottom: 20px; }
.case-why-card-title { font-size: 17px; font-weight: 800; color: var(--white); margin-bottom: 12px; }
.case-why-card-desc { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.85; }

.case-faq-section { padding-block: clamp(56px,8vw,96px); background: #EEF2F6; }
.case-faq-title { font-size: clamp(20px,2.5vw,32px); font-weight: 900; color: var(--dark); letter-spacing: -0.02em; margin-block: 12px 40px; }
.case-faq-list { display: flex; flex-direction: column; }
.case-faq-item { border-top: 1px solid var(--border); padding: 28px 0; }
.case-faq-item:last-child { border-bottom: 1px solid var(--border); }
.case-faq-q { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 12px; display: flex; gap: 14px; align-items: flex-start; }
.case-faq-q::before { content: 'Q'; color: var(--accent); font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: 0.12em; flex-shrink: 0; margin-top: 2px; }
.case-faq-a { font-size: 14px; color: var(--text-light); line-height: 1.9; padding-left: 26px; }

@media (max-width: 768px) {
  .case-detail-body-grid { grid-template-columns: 1fr; }
  .case-why-cards { grid-template-columns: 1fr; }
}

.text-accent { color: var(--accent); }
.text-white { color: var(--white); }
.text-dark { color: var(--dark); }
.text-center { text-align: center; }
.mt-sm { margin-top: clamp(16px,2vw,24px); }
.mt-md { margin-top: clamp(24px,3vw,40px); }
.mt-lg { margin-top: clamp(40px,5vw,64px); }
.fw-900 { font-weight: 900; }
.fw-700 { font-weight: 700; }

@media (max-width: 768px) {
  .site-nav { display: none; }
  .menu-toggle { display: flex; }
  .mobile-nav { display: block; }
  .faq-intro { position: static; }

  /* ── Hero 모바일: 슬라이더 위 / 텍스트 아래 ── */
  #hero { height: auto; overflow: visible; }
  .hero-slider-bg { position: relative; top: auto; left: auto; right: auto; bottom: auto; aspect-ratio: 4/3; overflow: hidden; }
  #hero .slider-wrap { top: 0; left: 0; right: 0; bottom: 0; height: 100% !important; }
  .hero-overlay { display: none; }
  .hero-content { position: static; background: var(--bg); padding: 32px clamp(20px,5vw,32px); max-width: 100%; display: flex; flex-direction: column; gap: 20px; }
  .hero-h1 { color: var(--text); font-size: clamp(28px,7vw,40px); }
  .hero-sub { color: var(--text-light); }
}

@media (max-width: 480px) { .cta-card { padding: 36px 24px; } }

@media (min-width: 900px) {
  .case-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px,6vw,80px); align-items: center; }
  .case-layout--reverse .case-slider-col { order: 2; }
  .case-layout--reverse .case-info-col { order: 1; }
  .case-info-col { padding-top: 0; }
}