:root{
  /* 히어로 배경 이미지 교체 */
  --hero-image: url('main03.png');
  --primary:#1f5fbf; --primary-600:#1a4e9b;
  --ink:#0c1b2a; --muted:#6b7c93;
  --bg:#f6f8fb; --card:#ffffff;
  --ring: rgba(31,95,191,.18);
  --radius:16px; --max:1120px;
  --shadow:0 10px 24px rgba(12,27,42,.08), 0 2px 6px rgba(12,27,42,.06);
}
*{box-sizing:border-box} html,body{height:100%}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Apple SD Gothic Neo,Noto Sans KR,Pretendard,'맑은 고딕',sans-serif;color:var(--ink);background:var(--bg);line-height:1.55}
a{color:inherit} .container{max-width:var(--max);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.2rem;border-radius:12px;font-weight:700;text-decoration:none;border:1px solid transparent;transition:.2s ease}
.btn.primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px var(--ring);text-wrap-mode:nowrap;}
.btn.primary:hover{background:var(--primary-600);transform:translateY(-1px)}
.btn.ghost{background:#fff;color:var(--primary);border-color:rgba(31,95,191,.2)}
.btn.ghost:hover{background:#f0f5ff}
.section{padding:100px 0}
.section h2{font-size:clamp(1.4rem,2.2vw,2rem);margin:0 0 18px}
.section p.lead{color:var(--muted);margin-top:0}

/* 헤더 */
header{
  position:sticky;
  top:0;
  z-index:20;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(12,27,42,.08);
  box-shadow:0 1px 12px rgba(12,27,42,.04);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px;
}
.brand{
  display:flex;
  align-items:center;
  gap:.8rem;
  font-weight:800;
  font-size:1.25rem;
  color:var(--ink);
  transition:transform .2s ease;
}
.brand:hover{
  transform:scale(1.02);
}
.brand-logo{
  height:32px;
  width:auto;
  filter:drop-shadow(0 2px 8px rgba(31,95,191,.25));
  transition:all .2s ease;
}
.nav .links{
  display:none;
  gap:2rem;
  align-items:center;
}
.nav .links a{
  position:relative;
  padding:.5rem 1rem;
  border-radius:8px;
  font-weight:600;
  color:var(--ink);
  text-decoration:none;
  transition:all .3s ease;
}
.nav .links a:not(.btn):hover{
  color:var(--primary);
  background:rgba(31,95,191,.06);
}
.nav .links a:not(.btn)::after{
  content:'';
  position:absolute;
  bottom:0;
  left:50%;
  width:0;
  height:2px;
  background:var(--primary);
  border-radius:2px;
  transition:all .3s ease;
  transform:translateX(-50%);
}
.nav .links a:not(.btn):hover::after{
  width:60%;
}
@media(min-width:768px){
  .nav .links{display:flex}
}

/* 히어로 */
.hero{position:relative;overflow:hidden;
  background:
    radial-gradient(1200px 600px at 85% -20%, rgba(31,95,191,.45), transparent 60%),
    linear-gradient(120deg,#102a56 0%, #1b4f9e 38%, #3a86c9 100%);
  color:#fff;}
.hero-wrap{display:grid;gap:28px;grid-template-columns:1fr;align-items:center;padding:64px 0}
.hero-text h1{font-size:clamp(1.8rem,3.6vw,2.8rem);line-height:1.15;margin:20px 0 10px}
.hero-text h2{font-size:clamp(1.5rem,3vw,2rem);line-height:1.2;margin:0 0 10px;font-weight:500}
.hero-text p{color:#eaf1ff;font-size:clamp(1rem,1.4vw,1.125rem);margin:0 0 20px}
.badge{display:inline-flex;gap:.5rem;align-items:center;padding:.4rem .7rem;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);border-radius:999px;font-weight:600}
.hero-media{
  width: 110%;
  min-height:300px;
  background-image:var(--hero-image);
  background-size:contain;
  background-position:center;
  background-repeat:no-repeat;
  /* box-shadow:var(--shadow); */
  /* border:1px solid rgba(255,255,255,.25) */
  /* border-radius:var(--radius); */
}
/* 모바일 히어로 최적화 */
@media(max-width: 767px) {
  .hero .container {
    padding: 0 24px;
  }
  
  .hero-wrap {
    padding: 48px 0;
    gap: 24px;
  }
  
  .hero-text {
    text-align: center;
    margin-top: 100px;
  }
  
  .cta {
    justify-content: center;
    gap: 12px;
  }
  
  .btn {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }
  .hero-media {
    min-height: 200px;
    margin-bottom: 40px;
    width: 100%;
  }
}

/* 태블릿 히어로 최적화 */
@media(min-width: 768px) and (max-width: 899px) {
  .hero .container {
    padding: 0 32px;
  }
  .hero-text {
    text-align: center;
    margin-top: 100px;
  }
  .cta {
    justify-content: center;
    gap: 12px;
  }
  .hero-wrap {
    padding: 72px 0;
  }
  .hero-media {
    min-height: 250px;
    margin-bottom: 100px;
    width: 100%;
  }
}

@media(min-width:900px){.hero-wrap{grid-template-columns:1.1fr .9fr;padding:88px 40px}}

/* 공통 카드 & 그리드 */
.grid-3{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.grid-3{grid-template-columns:repeat(3,1fr)}}
.grid-2{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:900px){.grid-2{grid-template-columns:repeat(2,1fr)}}
.card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);border:1px solid rgba(12,27,42,.06)}
.card h3{margin:0 0 8px;font-size:1.1rem}
.meta{color:var(--muted);font-size:.94rem}
.list{margin:10px 0 0;padding-left:1.1rem}
.list li{margin:.3rem 0}

/* 보안 섹션 전용 리스트 스타일 */
.security-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.security-list li {
  margin: 10px 0;
  padding-left: 24px;
  position: relative;
  color: #4a5568;
  font-size: 0.9rem;
  line-height: 1.5;
}

.security-list li::before {
  content: '🔹';
  position: absolute;
  left: 0;
  top: 0;
  font-size: 0.9rem;
}

#security .card {
  transition: all 0.3s ease;
}

#security .card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(31,95,191,0.12);
}

/* 워크플로우 */
.flow{display:grid;gap:14px;grid-template-columns:1fr}
@media(min-width:900px){.flow{grid-template-columns:1.1fr .9fr}}
.steps{display:grid;gap:10px}
.step{background:#fff;border:1px dashed rgba(12,27,42,.12);border-radius:14px;padding:14px}
.step strong{display:block}
.mock{
  min-height: 250px;
  height:100%;
  border-radius:var(--radius);
  background-image:url('video06.png');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  box-shadow:var(--shadow);
  border:1px solid rgba(12,27,42,.06);
}

/* 보안/가격/FAQ */
.pill{display:inline-block;padding:.25rem .6rem;border-radius:999px;background:#e9f1ff;color:#1a4e9b;font-weight:700;font-size:.82rem}
details{background:#fff;border:1px solid rgba(12,27,42,.08);border-radius:12px;padding:12px 14px}
details+details{margin-top:10px}
summary{cursor:pointer;font-weight:700}

/* Contact 섹션 */
#contact {
  background: linear-gradient(135deg, #f8faff 0%, #eef6ff 100%);
  position: relative;
  overflow: hidden;
  padding: 150px 0;
}
#contact::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 20%, rgba(31,95,191,0.08) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}
#contact .container {
  position: relative;
  z-index: 1;
}
#contact h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--ink), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#contact p.lead {
  font-size: 1.1rem;
  margin-bottom: 0;
}
#contact .btn {
  padding: 1rem 2rem;
  font-size: 1.05rem;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(31,95,191,0.15);
  transition: all 0.3s ease;
}
#contact .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(31,95,191,0.25);
}
#contact .btn.primary {
  background: linear-gradient(135deg, var(--primary), #3a86c9);
}
#contact .cta {
  justify-content: center;
}
/* @keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
} */

/* 푸터 & 유틸 */
footer{padding:32px 0;color:#5f6b7a}
.cta{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  align-items:center;
}
.center{text-align:center} 
.spacer{height:8px}
.mt-16{margin-top:16px} .mt-24{margin-top:24px} .mt-32{margin-top:32px}
.icon{font-size:1.15rem;opacity:.9;margin-right:.35rem}

/* AI 기능 섹션 특별 스타일링 */
#ai-detail {
  background: linear-gradient(135deg, #f0f7ff 0%, #e6f3ff 50%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

#ai-detail::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(31,95,191,0.03) 0%, transparent 70%);
  pointer-events: none;
}

#ai-detail .container {
  position: relative;
  z-index: 1;
}

#ai-detail h2 {
  text-align: center;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  background: linear-gradient(135deg, var(--ink) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

#ai-detail p.lead {
  text-align: center;
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 40px;
}

#ai-detail .grid-3 {
  gap: 24px;
  grid-template-columns: 1fr;
}

@media(min-width: 768px) {
  #ai-detail .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media(min-width: 1024px) {
  #ai-detail .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

#ai-detail .card {
  background: linear-gradient(135deg, #ffffff 0%, #fafcff 100%);
  border: 1px solid rgba(31,95,191,0.08);
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 
    0 8px 32px rgba(31,95,191,0.08),
    0 1px 2px rgba(0,0,0,0.02);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

#ai-detail .card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, #3a86c9 50%, var(--primary) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

#ai-detail .card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 20px 48px rgba(31,95,191,0.15),
    0 8px 16px rgba(31,95,191,0.1);
  border-color: rgba(31,95,191,0.15);
}

#ai-detail .card:hover::before {
  opacity: 1;
}

#ai-detail .card h3 {
  margin: 0 0 16px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  padding-left: 20px;
}

#ai-detail .card h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary) 0%, #3a86c9 100%);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* 카테고리별 색상 구분 */
#ai-detail .card[data-category="agent"] h3::before {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

#ai-detail .card[data-category="assistant"] h3::before {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

#ai-detail .card[data-category="monitoring"] h3::before {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

#ai-detail .card[data-category="notification"] h3::before {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

#ai-detail .card[data-category="medication"] h3::before {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

#ai-detail .card[data-category="telemedicine"] h3::before {
  background: linear-gradient(135deg, var(--primary) 0%, #3a86c9 100%);
}

#ai-detail .card:hover h3::before {
  height: 32px;
  width: 6px;
}

#ai-detail .card .list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

#ai-detail .card .list li {
  margin: 12px 0;
  padding-left: 24px;
  position: relative;
  color: #4a5568;
  font-size: 0.95rem;
  line-height: 1.6;
}

#ai-detail .card .list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 1rem;
}

#ai-detail .card:hover .list li {
  color: var(--ink);
}

/* AI 카드들의 지연 애니메이션 */
#ai-detail .card:nth-child(1) { animation-delay: 0.1s; }
#ai-detail .card:nth-child(2) { animation-delay: 0.2s; }
#ai-detail .card:nth-child(3) { animation-delay: 0.3s; }
#ai-detail .card:nth-child(4) { animation-delay: 0.4s; }
#ai-detail .card:nth-child(5) { animation-delay: 0.5s; }
#ai-detail .card:nth-child(6) { animation-delay: 0.6s; }

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

#ai-detail .card {
  animation: fadeInUp 0.6s ease-out forwards;
  opacity: 0;
}

/* 모바일 최적화 */
@media(max-width: 767px) {
  #ai-detail .card h3 {
    padding-left: 16px;
    font-size: 1.1rem;
  }
  
  #ai-detail .card h3::before {
    width: 3px;
    height: 20px;
  }
  
  #ai-detail .grid-3 {
    gap: 20px;
  }
  
  #ai-detail .card {
    padding: 24px 20px;
  }
  
  #ai-detail .card:hover h3::before {
    height: 24px;
    width: 4px;
  }
}

/* 태블릿 최적화 */
@media(min-width: 768px) and (max-width: 1023px) {
  #ai-detail .card h3 {
    font-size: 1.15rem;
  }
}

/* 접근성 개선 - 애니메이션 비활성화 옵션 */
@media (prefers-reduced-motion: reduce) {
  #ai-detail .card {
    animation: none;
    opacity: 1;
  }
  
  #ai-detail .card,
  #ai-detail .card h3::before {
    transition: none;
  }
}

/* 고해상도 디스플레이 최적화 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  #ai-detail .card {
    border-width: 0.5px;
  }
}