@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800&family=Manrope:wght@600;700;800&display=swap');

:root {
  --navy: #071525;
  --navy-2: #0d2035;
  --cyan: #24d5df;
  --cyan-dark: #0baab6;
  --text: #162235;
  --muted: #677487;
  --line: #dfe6ed;
  --bg: #f4f7fa;
  --white: #ffffff;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Noto Sans KR', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
}
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  height: 78px;
  z-index: 1000;
  background: rgba(5, 16, 29, .72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.09);
  transition: .25s ease;
}
.site-header.scrolled { background: rgba(5, 16, 29, .96); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand img { width: 150px; height: auto; filter: brightness(0) invert(1); opacity: .92; }
.main-nav { display: flex; align-items: center; gap: 30px; color: #d8e3ec; font-size: 14px; font-weight: 600; }
.main-nav a:hover { color: var(--cyan); }
.nav-cta { padding: 10px 17px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; }
.menu-toggle { display: none; border: 0; background: none; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: white; margin: 5px 0; }

.hero {
  min-height: 780px;
  position: relative;
  background: url('../img/main_img.jpeg') 68% center / cover no-repeat;
  display: flex;
  align-items: center;
  color: white;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(4,14,27,.98) 0%, rgba(4,14,27,.9) 35%, rgba(4,14,27,.28) 67%, rgba(4,14,27,.08) 100%);
}
.hero-content { position: relative; padding-top: 70px; }
.eyebrow, .section-kicker {
  font-family: Manrope, sans-serif;
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: .18em;
  font-weight: 800;
  margin: 0 0 18px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(42px, 5.2vw, 72px);
  line-height: 1.18;
  letter-spacing: -.045em;
}
.hero-copy { margin: 28px 0 34px; color: #c7d3dd; font-size: 19px; }
.hero-actions { display: flex; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; border-radius: 6px; font-weight: 700; transition: .2s ease; }
.btn-primary { background: var(--cyan); color: #041621; }
.btn-primary:hover { background: #64edf4; transform: translateY(-2px); }
.btn-ghost { border: 1px solid rgba(255,255,255,.32); color: white; }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.metrics { margin-top: -58px; position: relative; z-index: 4; }
.metrics-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: white; box-shadow: 0 20px 60px rgba(6,22,40,.16);
}
.metrics article { padding: 30px 26px; border-right: 1px solid var(--line); }
.metrics article:last-child { border-right: 0; }
.metrics strong { display: block; font: 800 23px/1.25 Manrope, sans-serif; color: var(--navy); }
.metrics span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }

.section { padding: 120px 0; }
.section-alt { background: var(--bg); }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 74px; align-items: center; }
.section-copy h2, .section-heading h2 {
  margin: 0 0 24px; font-size: clamp(32px, 4vw, 48px); line-height: 1.3; letter-spacing: -.035em;
}
.section-copy p, .section-heading p { color: var(--muted); }
.section-image img { border-radius: 12px; box-shadow: 0 24px 70px rgba(18,43,70,.14); }
.section-heading { max-width: 760px; margin: 0 auto 64px; text-align: center; }
.section-heading .section-kicker { margin-bottom: 14px; }

.service-list { display: grid; gap: 38px; }
.service-row {
  display: grid; grid-template-columns: 1.05fr .95fr; align-items: stretch;
  background: white; border-radius: 14px; overflow: hidden; box-shadow: 0 16px 44px rgba(15,37,61,.08);
}
.service-row.reverse .service-image { order: 2; }
.service-image img { height: 100%; min-height: 390px; object-fit: cover; }
.service-content { padding: 54px; align-self: center; }
.service-content > span { font: 800 14px Manrope, sans-serif; color: var(--cyan-dark); }
.service-content h3 { font-size: 30px; margin: 12px 0 14px; }
.service-content p { color: var(--muted); }
.service-content ul { margin: 24px 0 0; padding: 0; list-style: none; }
.service-content li { margin: 10px 0; padding-left: 22px; position: relative; }
.service-content li::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-dark); position: absolute; left: 0; top: .65em; }

.maintenance-grid { grid-template-columns: .95fr 1.05fr; }
.check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 28px; }
.check-grid span { padding: 14px 16px; background: var(--bg); border-left: 3px solid var(--cyan-dark); font-weight: 600; font-size: 14px; }

.process-section { background: var(--navy); color: white; }
.process-section .section-heading p:not(.section-kicker) { color: #9db0c2; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.process-grid article { padding: 30px 25px; border: 1px solid rgba(255,255,255,.11); background: rgba(255,255,255,.035); }
.process-grid span { color: var(--cyan); font: 800 13px Manrope, sans-serif; }
.process-grid h3 { margin: 15px 0 10px; }
.process-grid p { color: #9db0c2; font-size: 14px; }

.remote-section { background: #eef4f7; }
.remote-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 70px; }
.remote-copy h2 { font-size: 46px; margin: 0 0 18px; }
.remote-copy p { color: var(--muted); margin-bottom: 28px; }
.remote-copy small { display: block; color: #7f8c99; margin-top: 12px; }
.remote-image img { border-radius: 12px; }

.contact-section { padding: 110px 0; background: linear-gradient(135deg, #061423, #0a2741); color: white; }
.section-heading.light p { color: #a9bac8; }
.contact-grid { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid rgba(255,255,255,.12); }
.contact-grid > * { padding: 34px; border-right: 1px solid rgba(255,255,255,.12); }
.contact-grid > *:last-child { border-right: 0; }
.contact-grid span { display: block; color: var(--cyan); font: 800 12px Manrope, sans-serif; letter-spacing: .14em; margin-bottom: 10px; }
.contact-grid strong { font-size: 18px; line-height: 1.55; }

footer { background: #04101d; color: #8092a2; padding: 26px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 13px; }
.footer-inner img { width: 108px; filter: brightness(0) invert(1); opacity: .62; }
.footer-inner a { color: var(--cyan); font-weight: 700; }

@media (max-width: 900px) {
  .main-nav {
    position: fixed; top: 78px; left: 0; right: 0;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: #061423; padding: 18px 20px 26px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px 4px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .menu-toggle { display: block; }
  .metrics-grid, .process-grid { grid-template-columns: repeat(2, 1fr); }
  .split-grid, .remote-grid, .service-row { grid-template-columns: 1fr; }
  .service-row.reverse .service-image { order: 0; }
  .service-content { padding: 40px 32px; }
  .section { padding: 90px 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-grid > * { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .contact-grid > *:last-child { border-bottom: 0; }
}

@media (max-width: 600px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .site-header { height: 68px; }
  .main-nav { top: 68px; }
  .brand img { width: 124px; }
  .hero { min-height: 700px; background-position: 72% center; }
  .hero-overlay { background: linear-gradient(90deg, rgba(4,14,27,.97), rgba(4,14,27,.82) 63%, rgba(4,14,27,.46)); }
  .hero-content { padding-top: 40px; }
  .hero h1 { font-size: 39px; }
  .hero-copy { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .metrics { margin-top: -38px; }
  .metrics-grid, .process-grid { grid-template-columns: 1fr; }
  .metrics article { border-right: 0; border-bottom: 1px solid var(--line); }
  .section { padding: 76px 0; }
  .section-heading { margin-bottom: 42px; }
  .service-image img { min-height: 250px; }
  .service-content { padding: 32px 22px; }
  .service-content h3 { font-size: 25px; }
  .check-grid { grid-template-columns: 1fr; }
  .remote-copy h2 { font-size: 36px; }
  .footer-inner { flex-direction: column; }
}