:root {
  --bg: #0b0f19;
  --bg-alt: #121827;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-strong: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.1);
  --text: #ffffff;
  --muted: #b6beca;
  --muted-2: #8a94a6;
  --primary: #ffffff;
  --dark: #0b0f19;
  --max-width: 1180px;
  --header-height: 78px;
  --radius: 22px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(122, 162, 255, 0.16), transparent 20%),
    radial-gradient(circle at left top, rgba(255, 255, 255, 0.06), transparent 18%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(11, 15, 25, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-company {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.brand-service {
  font-size: 0.72rem;
  color: var(--muted-2);
  letter-spacing: 0.18em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  color: var(--muted);
  font-size: 0.96rem;
  transition: 0.2s ease;
}

.main-nav a:hover {
  color: var(--text);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 1.1rem;
  cursor: pointer;
}

main {
  padding-top: var(--header-height);
}

.section {
  padding: 92px 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.025);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-section {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 18px;
}

.hero-text h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: 1.04;
}

.hero-text h2 {
  margin: 16px 0 0;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  color: #e6ebf3;
  font-weight: 600;
}

.hero-description {
  margin-top: 24px;
  max-width: 720px;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 16px;
  font-weight: 600;
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  color: var(--dark);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.hero-card,
.contact-box,
.info-card,
.usecase-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  background: var(--panel);
  padding: 28px;
}

.card-label,
.section-label {
  margin: 0 0 10px;
  color: var(--muted-2);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-card h3 {
  margin: 0 0 20px;
  font-size: 1.55rem;
  line-height: 1.35;
}

.feature-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.feature-list li + li {
  margin-top: 10px;
}

.section-title {
  margin: 0;
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1.22;
}

.section-desc {
  margin-top: 20px;
  color: var(--muted);
  max-width: 900px;
  font-size: 1rem;
}

.section-desc.narrow {
  max-width: 760px;
}

.card-grid {
  display: grid;
  gap: 22px;
  margin-top: 40px;
}

.card-grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.info-card {
  background: var(--panel);
  padding: 28px;
}

.dark-card {
  background: rgba(0, 0, 0, 0.18);
}

.info-card h3 {
  margin: 0 0 14px;
  font-size: 1.18rem;
}

.info-card p {
  margin: 0;
  color: var(--muted);
}

.usecase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}

.usecase-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.usecase-item {
  background: var(--panel);
  padding: 18px 20px;
  color: #edf2fb;
}

.section-contact .contact-box {
  background: var(--panel-strong);
  padding: 34px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.contact-item {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.18);
  padding: 18px;
}

.contact-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted-2);
  font-size: 0.82rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(11, 15, 25, 0.95);
}

.footer-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--muted-2);
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.top-button {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 54px;
  height: 54px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: 0.25s ease;
  z-index: 1001;
  font-weight: 700;
  font-size: 0.86rem;
}

.top-button.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

@media (max-width: 980px) {
  .hero-grid,
  .usecase-grid,
  .card-grid.three,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .usecase-list {
    grid-template-columns: 1fr 1fr;
  }

  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(11, 15, 25, 0.98);
    border-bottom: 1px solid var(--line);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 10px 16px 16px;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 14px 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .menu-toggle {
    display: inline-block;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 72px 0;
  }

  .container {
    width: min(var(--max-width), calc(100% - 24px));
  }

  .hero-description,
  .section-desc,
  .info-card p {
    font-size: 0.95rem;
  }

  .hero-card,
  .info-card,
  .contact-box {
    padding: 22px;
  }

  .usecase-list {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .top-button {
    right: 16px;
    bottom: 16px;
    width: 50px;
    height: 50px;
  }
}
.solution-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 40px;
}

.solution-images img {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.1);
  object-fit: cover;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

/* 모바일 */
@media (max-width: 768px) {
  .solution-images {
    grid-template-columns: 1fr;
  }
}