:root {
  --navy: #102a43;
  --navy-2: #163b5c;
  --blue: #2563eb;
  --blue-soft: #eaf2ff;
  --beige: #f6f1e8;
  --beige-2: #fffaf1;
  --ink: #172033;
  --muted: #627083;
  --line: #dbe5f0;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(16, 42, 67, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", Arial, sans-serif;
  line-height: 1.65;
  background: var(--white);
}

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(20px, 4vw, 52px);
  border-bottom: 1px solid rgba(219, 229, 240, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  font-weight: 800;
  background: var(--navy);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--navy-2);
  font-size: 15px;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--navy);
}

.mobile-nav {
  display: none;
  position: sticky;
  top: 72px;
  z-index: 19;
  padding: 12px 20px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.mobile-nav a {
  display: block;
  padding: 10px 0;
  color: var(--navy);
  font-weight: 700;
}

.mobile-nav.is-open {
  display: block;
}

.section {
  padding: 92px 0;
}

.section-band {
  position: relative;
  overflow: hidden;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  padding: 80px 0 96px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(234, 242, 255, 0.82)),
    var(--beige-2);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(16, 42, 67, 0.06) 0 1px, transparent 1px 90px),
    linear-gradient(30deg, rgba(37, 99, 235, 0.08) 0 1px, transparent 1px 110px);
  mask-image: linear-gradient(90deg, transparent, #000 20%, #000 84%, transparent);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 48px;
  align-items: center;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-kicker {
  margin: 0 0 18px;
  color: var(--navy-2);
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  color: var(--navy);
  font-size: clamp(38px, 5.6vw, 68px);
  line-height: 1.14;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: 0;
}

h3 {
  color: var(--navy);
  font-size: 20px;
  line-height: 1.35;
}

.hero-lead,
.section-intro,
.section-head p,
.simulation p,
.cta-row p {
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  color: var(--navy);
  border-color: var(--line);
  background: var(--white);
}

.btn-ghost {
  color: var(--navy);
  border-color: rgba(16, 42, 67, 0.22);
  background: rgba(255, 255, 255, 0.62);
}

.btn-light {
  color: var(--navy);
  background: var(--white);
  box-shadow: var(--shadow);
}

.hero-panel,
.contact-card,
.notice-box,
.simulation {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  gap: 18px;
  padding: 28px;
}

.hero-panel div {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.hero-panel div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.panel-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.hero-panel strong {
  display: block;
  color: var(--navy);
  font-size: 22px;
  line-height: 1.35;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

.reason-list,
.feature-grid,
.model-grid {
  display: grid;
  gap: 18px;
}

.reason-list article,
.feature-grid article,
.model-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.reason-list span,
.model-card span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--blue);
  font-weight: 900;
}

.reason-list p,
.feature-grid p,
.model-card p,
.check-list p {
  color: var(--muted);
}

.section-blue {
  background: var(--blue-soft);
}

.section-beige {
  background: var(--beige);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-grid,
.model-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.check-list {
  display: grid;
  gap: 12px;
}

.check-list p {
  position: relative;
  margin: 0;
  padding: 16px 18px 16px 46px;
  border: 1px solid rgba(16, 42, 67, 0.1);
  border-radius: 8px;
  background: var(--white);
}

.check-list p::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 23px;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(-45deg);
}

.simulation {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.7fr);
  gap: 34px;
  padding: 34px;
}

.sim-form {
  display: grid;
  gap: 14px;
}

.sim-form label {
  display: grid;
  gap: 8px;
  color: var(--navy);
  font-weight: 800;
}

.sim-form input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
}

.sim-form output {
  display: block;
  margin-top: 6px;
  padding: 16px;
  border-radius: 8px;
  color: var(--navy);
  font-size: 20px;
  font-weight: 900;
  background: var(--blue-soft);
}

.cta-row,
.consult-grid,
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
}

.consult-grid {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
}

.contact-card {
  display: grid;
  gap: 8px;
  padding: 28px;
  font-style: normal;
}

.contact-card strong {
  color: var(--navy);
  font-size: 24px;
}

.contact-card a {
  color: var(--navy-2);
  font-weight: 700;
}

.notice-box {
  padding: 28px;
  box-shadow: none;
}

.notice-box p {
  margin-bottom: 8px;
  color: var(--navy-2);
  font-weight: 700;
}

.notice-box p:last-child {
  margin-bottom: 0;
}

.site-footer {
  padding: 42px 0;
  color: rgba(255, 255, 255, 0.86);
  background: var(--navy);
}

.site-footer strong {
  display: block;
  margin-bottom: 10px;
  color: var(--white);
  font-size: 20px;
}

.site-footer p {
  margin-bottom: 4px;
}

.footer-notice {
  max-width: 720px;
  font-size: 14px;
}

@media (max-width: 920px) {
  .desktop-nav {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .two-column,
  .simulation,
  .cta-row,
  .consult-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-row {
    align-items: start;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .site-header {
    min-height: 66px;
    padding-inline: 14px;
  }

  .brand small {
    display: none;
  }

  .mobile-nav {
    top: 66px;
  }

  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 58px 0 70px;
  }

  .hero-actions,
  .btn {
    width: 100%;
  }

  .feature-grid,
  .model-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .simulation,
  .contact-card,
  .notice-box {
    padding: 22px;
  }
}