:root {
  --blue-950: #003767;
  --blue-900: #00467f;
  --blue-800: #00549a;
  --blue-700: #0068b7;
  --blue-500: #1599d5;
  --sky-100: #eaf6fb;
  --sky-050: #f5fafc;
  --ink: #17242f;
  --muted: #5d6a74;
  --line: #dce6ec;
  --white: #ffffff;
  --max: 1180px;
  --media-inset: 6px;
  --shadow: 0 20px 60px rgba(0, 62, 109, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.skip-link {
  position: fixed; left: 16px; top: -60px; z-index: 999;
  padding: 12px 18px; color: #fff; background: var(--blue-950);
  border-radius: 8px; transition: top .2s;
}
.skip-link:focus { top: 16px; }
.shell { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,.96); border-bottom: 1px solid rgba(220,230,236,.9);
  backdrop-filter: blur(14px);
}
.header-top { border-bottom: 1px solid #edf2f5; }
.header-top .shell {
  min-height: 36px; display: flex; justify-content: flex-end; align-items: center;
  gap: 22px; color: #677681; font-size: 12px; letter-spacing: .02em;
}
.header-top a:hover { color: var(--blue-700); }
.header-main { min-height: 104px; display: flex; align-items: center; gap: 44px; }
.brand { display: flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 154px; height: auto; }
.main-nav { margin-left: auto; align-self: stretch; display:flex; align-items:center; }
.main-nav ul { height: 100%; display: flex; align-items: center; margin: 0; padding: 0; list-style: none; }
.main-nav li { height:100%; display:flex; align-items:center; }
.main-nav a {
  position: relative; display: flex; height:100%; min-height:104px; align-items: center; padding: 0 26px;
  font-size: 19px; font-weight: 800; color: #263844; letter-spacing: -.035em;
}
.main-nav a::after {
  content: ""; position: absolute; left: 26px; right: 26px; bottom: 0; height: 3px;
  background: var(--blue-700); transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--blue-800); }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); }
.menu-toggle {
  display: none; width: 44px; height: 44px; margin-left: auto; padding: 0;
  border: 0; border-radius: 50%; background: var(--sky-100); color: var(--blue-900);
}
.menu-toggle span, .menu-toggle::before, .menu-toggle::after {
  content: ""; display: block; width: 20px; height: 2px; margin: 5px auto; background: currentColor; transition: .25s;
}
.menu-toggle[aria-expanded="true"] span { opacity: 0; }
.menu-toggle[aria-expanded="true"]::before { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"]::after { transform: translateY(-7px) rotate(-45deg); }

.hero {
  min-height: 650px; display: grid; grid-template-columns: minmax(390px, 42%) 1fr;
  overflow: hidden; background: var(--blue-950);
}
.hero-copy {
  position: relative; isolation: isolate; padding: 96px max(48px, calc((100vw - var(--max))/2));
  padding-right: 64px; display: flex; flex-direction: column; justify-content: center; color: #fff;
  background: linear-gradient(145deg, #003867 0%, #005795 62%, #0075bd 100%);
}
.hero-copy::after {
  content: ""; position: absolute; width: 280px; height: 280px; right: -110px; bottom: -110px;
  z-index: -1; border: 48px solid rgba(255,255,255,.08); border-radius: 46% 54% 62% 38%; transform: rotate(28deg);
}
.eyebrow { margin: 0 0 22px; color: #8ed8f3; font-size: 13px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(44px, 5.1vw, 78px); line-height: 1.03; letter-spacing: -.055em; }
.hero h1 em { display: block; margin-top: 12px; color: #87daf5; font-style: normal; }
.hero-lead { max-width: 480px; margin: 30px 0 0; color: rgba(255,255,255,.82); font-size: 18px; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 0 22px;
  border: 1px solid transparent; border-radius: 3px; font-weight: 750; font-size: 14px; transition: .25s;
}
.button::after { content: "→"; font-size: 18px; }
.button-primary { color: var(--blue-900); background: #fff; }
.button-primary:hover { background: #dff5ff; transform: translateY(-2px); }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.45); }
.button-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.hero-visual { position: relative; min-width:0; overflow:hidden; background:#d9eaf3; }
.hero-slides, .hero-slide { position:absolute; inset:0; }
.hero-slide {
  margin:0; padding:var(--media-inset); display:grid; place-items:center; opacity:0; pointer-events:none;
  transition:opacity .8s ease; isolation:isolate; overflow:hidden;
}
.hero-slide::before {
  content:""; position:absolute; inset:-30px; z-index:-2; background-image:var(--slide);
  background-position:center; background-size:cover; filter:blur(22px); transform:scale(1.08); opacity:.48;
}
.hero-slide::after { content:""; position:absolute; inset:0; z-index:-1; background:rgba(233,246,251,.34); backdrop-filter:blur(2px); }
.hero-slide.active { opacity:1; pointer-events:auto; }
.hero-slide img { width:100%; height:100%; object-fit:contain; filter:drop-shadow(0 18px 38px rgba(0,43,78,.18)); }
.slider-controls { position:absolute; z-index:5; left:28px; right:28px; bottom:20px; display:flex; align-items:center; justify-content:space-between; }
.slider-arrow { width:42px; height:42px; display:grid; place-items:center; border:1px solid rgba(255,255,255,.7); border-radius:50%; color:#fff; background:rgba(0,55,103,.56); cursor:pointer; transition:.2s; }
.slider-arrow:hover { background:var(--blue-800); transform:translateY(-2px); }
.slider-dots { display:flex; gap:9px; }
.slider-dot { width:28px; height:5px; padding:0; border:0; border-radius:5px; background:rgba(255,255,255,.55); cursor:pointer; }
.slider-dot.active { background:#fff; }
.hero-mark { position: absolute; right: 40px; bottom: 40px; color: #fff; writing-mode: vertical-rl; font-size: 11px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; }

.section { padding: 112px 0; }
.section-soft { background: var(--sky-050); }
.section-dark { color: #fff; background: var(--blue-950); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; margin-bottom: 46px; }
.section-heading h2 { margin: 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.14; letter-spacing: -.05em; }
.section-heading p { max-width: 500px; margin: 0; color: var(--muted); line-height: 1.8; }
.section-dark .section-heading p { color: rgba(255,255,255,.68); }
.kicker { display: block; margin-bottom: 13px; color: var(--blue-700); font-size: 12px; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }
.section-dark .kicker { color: #7ad1ef; }

.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-card { min-height: 290px; padding: 36px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; transition: .25s; }
.feature-card:hover { position: relative; z-index: 1; transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-number { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; color: #fff; background: var(--blue-700); border-radius: 50%; font-size: 12px; font-weight: 800; }
.feature-card h3 { margin: 48px 0 12px; font-size: 25px; letter-spacing: -.04em; }
.feature-card p { margin: 0; color: var(--muted); line-height: 1.75; }
.text-link { display: inline-flex; gap: 10px; margin-top: 22px; color: var(--blue-800); font-size: 13px; font-weight: 800; }
.text-link::after { content: "↗"; }

.video-panel { display: grid; grid-template-columns: 1fr 1.45fr; align-items: stretch; background: #fff; box-shadow: var(--shadow); }
.video-copy { padding: 54px; background: linear-gradient(155deg, #e8f5fa 0%, #f7fbfd 100%); }
.video-copy h2 { margin: 0; color: var(--blue-950); font-size: clamp(32px, 4vw, 48px); letter-spacing: -.05em; }
.video-copy p { margin: 24px 0 0; color: var(--muted); line-height: 1.8; }
.video-wrap { min-height: 390px; background: #001e34; }
.video-wrap video { width: 100%; height: 100%; object-fit: cover; }

.branch-strip { display: grid; grid-template-columns: 1.4fr repeat(4,1fr); gap: 1px; background: rgba(255,255,255,.16); }
.branch-strip article { min-height: 190px; padding: 28px 24px; background: rgba(255,255,255,.06); }
.branch-strip article:first-child { background: rgba(255,255,255,.12); }
.branch-strip h3 { margin: 0 0 13px; font-size: 18px; }
.branch-strip p { margin: 0; color: rgba(255,255,255,.68); font-size: 13px; line-height: 1.75; }
.branch-strip a { display: inline-block; margin-top: 12px; color: #8ed8f3; font-weight: 700; }

.page-hero { position: relative; overflow: hidden; padding: 92px 0 0; background: linear-gradient(110deg,#f6fafc 0%,#eef7fb 65%,#fff 100%); }
.page-hero::before { content:""; position:absolute; width:360px; height:360px; right:-100px; top:-180px; border:70px solid rgba(0,104,183,.07); border-radius:50%; }
.breadcrumbs { display: flex; gap: 10px; align-items: center; color: #73828c; font-size: 12px; }
.breadcrumbs span::before { content:"/"; margin-right:10px; color:#a5b1b8; }
.page-hero-inner { padding: 38px 0 70px; }
.page-hero h1 { margin: 0; font-size: clamp(44px,7vw,74px); letter-spacing: -.055em; }
.page-hero p { max-width: 660px; margin: 22px 0 0; color: var(--muted); font-size: 17px; line-height: 1.8; }
.page-tab { display: inline-flex; margin-top: 40px; padding: 16px 38px; color:#fff; background:#6d7276; font-weight:700; }

.split-story { display:grid; grid-template-columns: 1fr 1fr; gap:64px; align-items:center; }
.story-visual { margin:0; padding:var(--media-inset); display:flex; align-items:center; justify-content:center; overflow:hidden; border:1px solid var(--line); background:#fff; }
.story-visual img { display:block; width:100%; height:auto; object-fit:contain; }
.story-copy h2 { margin:0; font-size:clamp(34px,4vw,52px); line-height:1.18; letter-spacing:-.05em; }
.story-copy p { margin:24px 0 0; color:var(--muted); line-height:2; }
.story-copy strong { color:var(--blue-800); }
.values { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:44px; }
.value-card { padding:30px; border-top:3px solid var(--blue-700); background:#fff; box-shadow:0 10px 35px rgba(0,60,105,.08); }
.value-card h3 { margin:0 0 10px; font-size:19px; }
.value-card p { margin:0; color:var(--muted); font-size:14px; line-height:1.75; }

.product-group + .product-group { margin-top:90px; }
.product-group-head { display:flex; align-items:end; justify-content:space-between; gap:24px; margin-bottom:28px; padding-bottom:20px; border-bottom:1px solid var(--line); }
.product-group h2 { margin:0; font-size:clamp(30px,4vw,44px); letter-spacing:-.045em; }
.product-group h2 small { color:var(--muted); font-size:.48em; font-weight:500; letter-spacing:-.02em; }
.product-group-head p { margin:0; color:var(--muted); }
.product-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.product-grid.single { grid-template-columns:minmax(280px,390px); }
.product-card { overflow:hidden; border:1px solid var(--line); background:#fff; transition:.25s; }
.product-card:hover { transform:translateY(-5px); box-shadow:var(--shadow); border-color:#c1d8e5; }
.product-photo { height:240px; margin:0; padding:var(--media-inset); display:flex; align-items:center; justify-content:center; background:#fff; }
.product-photo img { display:block; width:100%; height:100%; object-fit:contain; }
.product-card-body { padding:25px 26px 28px; }
.product-type { margin:0 0 8px; color:#eb503f; font-size:11px; font-weight:900; letter-spacing:.12em; }
.product-card h3 { margin:0; color:var(--blue-900); font-size:26px; line-height:1.08; letter-spacing:-.03em; }
.product-card p:last-child { margin:12px 0 0; color:var(--muted); font-size:14px; line-height:1.65; }
.training-grid { display:grid; grid-template-columns:1fr 1fr; gap:22px; }
.training-card { overflow:hidden; border:1px solid var(--line); background:#fff; }
.training-card.wide { grid-column:1/-1; display:grid; grid-template-columns:1.3fr 1fr; }
.training-photo { margin:0; padding:var(--media-inset); display:flex; align-items:center; justify-content:center; overflow:hidden; background:#fff; }
.training-photo img { display:block; width:100%; height:auto; object-fit:contain; }
.training-copy { padding:34px; }
.training-copy h2 { margin:0; font-size:30px; letter-spacing:-.04em; }
.training-copy p { margin:14px 0 0; color:var(--muted); line-height:1.8; }
.training-tag { color:var(--blue-700); font-size:12px; font-weight:900; letter-spacing:.12em; text-transform:uppercase; }

.contact-layout { display:grid; grid-template-columns:.9fr 1.4fr; gap:34px; }
.route-card { position:relative; overflow:hidden; min-height:520px; padding:48px; color:#fff; background:linear-gradient(155deg,var(--blue-950),#0068b7); }
.route-card::after { content:""; position:absolute; width:360px; height:360px; right:-160px; bottom:-150px; border:50px solid rgba(255,255,255,.1); border-radius:50%; }
.route-card > * { position:relative; z-index:1; }
.route-card h2 { margin:0; font-size:38px; letter-spacing:-.045em; }
.route-card p { max-width:420px; margin:18px 0 0; color:rgba(255,255,255,.76); line-height:1.8; }
.mini-map { position:relative; height:300px; margin:32px 0 22px; overflow:hidden; border:8px solid rgba(255,255,255,.18); border-radius:18px; background:#f5f8fa; box-shadow:0 18px 42px rgba(0,28,54,.28); }
.map-road { position:absolute; height:18px; border-radius:20px; background:#dde4e8; }
.map-road.r1 { width:132%; left:-14%; top:48%; transform:rotate(8deg); }
.map-road.r2 { width:92%; right:-20%; top:22%; transform:rotate(-34deg); }
.map-road.r3 { width:88%; left:10%; bottom:13%; transform:rotate(-7deg); }
.map-route { position:absolute; left:21%; top:31%; width:57%; height:37%; border-top:5px dotted #ef5b48; border-right:5px dotted #ef5b48; border-radius:0 48px 0 0; transform:rotate(5deg); }
.map-station { position:absolute; left:8%; bottom:15%; width:90px; height:90px; display:grid; place-items:center; text-align:center; border:10px solid #1599d5; border-radius:50%; color:#0879b4; background:#fff; font-size:15px; font-weight:900; line-height:1.15; box-shadow:0 8px 20px rgba(0,88,143,.16); }
.map-station small { display:block; font-size:10px; }
.map-place { position:absolute; color:#65737d; font-size:11px; font-weight:700; }
.map-place.p1 { left:26%; top:18%; }.map-place.p2 { left:48%; top:57%; }.map-place.p3 { right:8%; top:18%; }.map-place.p4 { right:4%; bottom:11%; }
.map-pin { position:absolute; right:17%; bottom:21%; width:58px; height:58px; display:grid; place-items:center; border:5px solid #fff; border-radius:50% 50% 50% 8px; color:#fff; background:var(--blue-800); transform:rotate(-45deg); box-shadow:0 10px 25px rgba(0,54,103,.3); }
.map-pin span { transform:rotate(45deg); font-size:22px; }
.map-label { position:absolute; right:4%; bottom:6%; padding:6px 9px; border-radius:5px; color:var(--blue-950); background:#fff; font-size:11px; font-weight:900; box-shadow:0 5px 14px rgba(0,38,72,.14); }
.route-line { position:relative; margin:45px 0 0; padding-left:34px; }
.route-line::before { content:""; position:absolute; left:9px; top:8px; bottom:8px; width:2px; background:rgba(255,255,255,.38); }
.route-stop { position:relative; margin:0 0 25px; }
.route-stop::before { content:""; position:absolute; left:-30px; top:3px; width:12px; height:12px; border:3px solid #fff; border-radius:50%; background:var(--blue-700); }
.route-stop strong { display:block; }
.route-stop span { color:rgba(255,255,255,.7); font-size:13px; }
.branch-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:18px; }
.branch-card { padding:30px; border:1px solid var(--line); background:#fff; }
.branch-card.main { grid-column:1/-1; border-top:4px solid var(--blue-700); }
.branch-card h3 { margin:0 0 15px; font-size:22px; }
.branch-card address { color:var(--muted); font-style:normal; line-height:1.75; }
.contact-numbers { display:flex; flex-wrap:wrap; gap:8px 20px; margin-top:18px; padding-top:16px; border-top:1px solid var(--line); font-size:13px; font-weight:700; }
.contact-numbers a { color:var(--blue-800); }

.site-footer { padding:58px 0 34px; color:rgba(255,255,255,.72); background:#002c50; }
.footer-main { display:grid; grid-template-columns:1.2fr 2fr; gap:70px; padding-bottom:42px; border-bottom:1px solid rgba(255,255,255,.13); }
.footer-brand img { width:146px; filter:brightness(0) invert(1); }
.footer-brand p { max-width:370px; margin:20px 0 0; font-size:13px; line-height:1.8; }
.footer-nav { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.footer-nav h3 { margin:0 0 14px; color:#fff; font-size:14px; }
.footer-nav a { display:block; margin:9px 0; font-size:12px; }
.footer-nav a:hover { color:#8ed8f3; }
.copyright { display:flex; justify-content:space-between; gap:20px; margin-top:28px; font-size:11px; }
.back-top { color:#8ed8f3; font-weight:800; }

.reveal { opacity:0; transform:translateY(22px); transition:opacity .7s,transform .7s; }
.reveal.in { opacity:1; transform:none; }

@media (max-width: 1050px) {
  .main-nav a { padding-inline:15px; }
  .main-nav a::after { left:15px; right:15px; }
  .hero { grid-template-columns:1fr 1.1fr; min-height:600px; }
  .hero-copy { padding-left:40px; padding-right:40px; }
  .feature-grid { grid-template-columns:1fr 1fr; }
  .branch-strip { grid-template-columns:repeat(3,1fr); }
  .branch-strip article:first-child { grid-column:1/-1; }
  .product-grid { grid-template-columns:repeat(2,1fr); }
}

@media (max-width: 780px) {
  .shell { width:min(calc(100% - 32px), var(--max)); }
  .header-top { display:none; }
  .header-main { min-height:78px; }
  .brand img { width:128px; }
  .menu-toggle { position:relative; z-index:1002; display:block; }
  .main-nav {
    position:absolute; top:100%; left:0; right:0; z-index:1001; display:none; height:calc(100vh - 78px); height:calc(100dvh - 78px);
    margin:0; overflow-y:auto; align-items:flex-start; color:#fff;
    background:linear-gradient(155deg,#003767 0%,#005c9f 58%,#0078be 100%);
    box-shadow:0 24px 60px rgba(0,35,65,.34);
  }
  .main-nav.open { display:block; }
  .main-nav ul { height:auto; display:block; padding:34px 22px 60px; background:transparent; }
  .main-nav li { height:auto; display:block; }
  .main-nav a {
    height:auto; min-height:78px; padding:0 22px; border-bottom:1px solid rgba(255,255,255,.2);
    color:#fff; background:transparent; font-size:24px;
  }
  .main-nav a:hover, .main-nav a[aria-current="page"] { color:#fff; background:rgba(255,255,255,.1); }
  .main-nav a::after { left:22px; right:auto; bottom:0; width:42px; background:#8ed8f3; }
  .hero { min-height:auto; grid-template-columns:1fr; }
  .hero-copy { min-height:500px; padding:70px 24px; }
  .hero-visual { min-height:380px; }
  .section { padding:78px 0; }
  .section-heading { display:block; }
  .section-heading p { margin-top:18px; }
  .feature-grid { grid-template-columns:1fr; }
  .feature-card { min-height:auto; }
  .video-panel { grid-template-columns:1fr; }
  .video-copy { padding:34px; }
  .video-wrap { min-height:260px; }
  .branch-strip { grid-template-columns:1fr 1fr; }
  .branch-strip article:first-child { grid-column:1/-1; }
  .page-hero { padding-top:60px; }
  .page-hero-inner { padding-bottom:52px; }
  .split-story { grid-template-columns:1fr; gap:36px; }
  .split-story.reverse .story-visual { order:0; }
  .split-story.reverse .story-copy { order:1; }
  .story-visual { min-height:0; }
  .values { grid-template-columns:1fr; }
  .product-grid { grid-template-columns:1fr; }
  .product-grid.single { grid-template-columns:1fr; }
  .product-group-head { display:block; }
  .product-group-head p { margin-top:10px; }
  .training-grid { grid-template-columns:1fr; }
  .training-card.wide { grid-column:auto; grid-template-columns:1fr; }
  .training-photo { min-height:0; }
  .contact-layout { grid-template-columns:1fr; }
  .route-card { min-height:auto; padding:36px 28px; }
  .mini-map { height:280px; border-width:6px; }
  .branch-grid { grid-template-columns:1fr; }
  .branch-card.main { grid-column:auto; }
  .footer-main { grid-template-columns:1fr; gap:42px; }
  .footer-nav { grid-template-columns:1fr 1fr; }
  .copyright { display:block; }
  .copyright .back-top { display:inline-block; margin-top:14px; }
}

@media (max-width: 460px) {
  .hero-copy { min-height:470px; }
  .hero h1 { font-size:42px; }
  .hero-visual { min-height:290px; }
  .slider-controls { left:14px; right:14px; bottom:9px; }
  .hero-actions { display:grid; }
  .branch-strip { grid-template-columns:1fr; }
  .product-photo { height:220px; }
  .footer-nav { grid-template-columns:1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior:auto !important; transition:none !important; animation:none !important; }
  .reveal { opacity:1; transform:none; }
}