:root{
  --brand:#0b4ea2; --accent:#0a8ed1; --ink:#15191f; --sub:#5b6472; --line:#e5e8ee;
  --bg:#ffffff; --bg2:#f5f7fa; --dark:#0e1a2b; --radius:14px;
  --max:1240px; --hh:80px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Pretendard,"Noto Sans KR",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;word-break:keep-all;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--accent);text-transform:uppercase}
.h2{font-size:clamp(26px,3.4vw,40px);font-weight:800;line-height:1.3;letter-spacing:-.02em;margin:10px 0 16px}
.lead{font-size:clamp(15px,1.4vw,18px);color:var(--sub)}
.center{text-align:center}
.sec{padding:clamp(64px,9vw,120px) 0}
.sec.gray{background:var(--bg2)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--accent)}
.btn-line{border:1.5px solid currentColor}
.btn-line:hover{background:#fff;color:var(--ink)}
.btn-kakao{background:#fee500;color:#191919}
.btn-naver{background:#03c75a;color:#fff}

/* header */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hd .wrap{display:flex;align-items:center;justify-content:space-between;height:var(--hh)}
.logo img{height:34px;width:auto}
.gnb{display:flex;gap:6px;height:100%}
.gnb>li{list-style:none;position:relative;display:flex;align-items:center}
.gnb>li>a{padding:0 22px;font-weight:700;font-size:17px;height:100%;display:flex;align-items:center}
.gnb>li:hover>a,.gnb>li.on>a{color:var(--brand)}
.gnb .sub{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px rgba(15,25,45,.1);padding:10px;min-width:170px;opacity:0;visibility:hidden;transition:.2s}
.gnb>li:hover .sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.gnb .sub a{display:block;padding:9px 14px;border-radius:8px;font-size:15px;color:var(--sub);white-space:nowrap}
.gnb .sub a:hover{background:var(--bg2);color:var(--brand)}
.hd-sns{display:flex;gap:10px}
.hd-sns a{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--bg2);font-size:12px;font-weight:800;color:var(--sub)}
.hd-sns a:hover{background:var(--brand);color:#fff}
.burger{display:none;width:44px;height:44px;border:0;background:none;cursor:pointer}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px auto;transition:.2s}
.mnav{display:none}

/* hero slider */
.hero{position:relative;height:min(88vh,820px);min-height:520px;overflow:hidden;color:#fff;background:var(--dark)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1.2s;display:flex;align-items:center}
.slide.on{opacity:1}
.slide .bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.08);transition:transform 7s linear}
.slide.on .bg{transform:scale(1)}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,16,30,.78),rgba(8,16,30,.35) 70%,rgba(8,16,30,.2))}
.slide .wrap{position:relative;z-index:2;width:100%}
.slide h1,.slide h2{font-size:clamp(32px,5.2vw,64px);font-weight:800;line-height:1.22;letter-spacing:-.03em;margin:14px 0 22px}
.slide p{font-size:clamp(15px,1.6vw,20px);opacity:.88;max-width:620px}
.slide .eyebrow{color:#7cc7ff}
.hero-dots{position:absolute;bottom:36px;left:0;right:0;z-index:5}
.hero-dots .wrap{display:flex;gap:10px}
.hero-dots button{width:34px;height:4px;border:0;background:rgba(255,255,255,.35);cursor:pointer;border-radius:2px}
.hero-dots button.on{background:#fff;width:60px}

/* sub hero */
.shero{position:relative;height:360px;display:flex;align-items:center;color:#fff;background:var(--dark) center/cover no-repeat;text-align:center}
.shero::after{content:"";position:absolute;inset:0;background:rgba(8,16,30,.55)}
.shero .wrap{position:relative;z-index:2;width:100%}
.shero h1{font-size:clamp(30px,4vw,46px);font-weight:800;letter-spacing:-.02em}
.shero p{opacity:.9;margin-top:10px;font-size:clamp(15px,1.4vw,18px)}
.lnb{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:var(--hh);z-index:40}
.lnb .wrap{display:flex;justify-content:center;gap:4px;overflow-x:auto;scrollbar-width:none}
.lnb a{padding:18px 26px;font-weight:600;color:var(--sub);white-space:nowrap;border-bottom:3px solid transparent}
.lnb a.on{color:var(--brand);border-color:var(--brand)}

/* grids & cards */
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.tile{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;color:#fff;display:flex;align-items:flex-end}
.tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s}
.tile:hover img{transform:scale(1.06)}
.tile::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(5,12,25,.8))}
.tile span{position:relative;z-index:2;padding:22px;font-size:19px;font-weight:700}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.card:hover{box-shadow:0 14px 36px rgba(15,25,45,.1);transform:translateY(-3px)}
.card .ph{aspect-ratio:4/3;overflow:hidden;background:var(--bg2)}
.card .ph img{width:100%;height:100%;object-fit:cover}
.card .tx{padding:22px}
.card h3{font-size:19px;font-weight:700;margin-bottom:6px}
.card p{color:var(--sub);font-size:15px}
.band{position:relative;color:#fff;background:var(--dark) center/cover no-repeat;padding:clamp(80px,10vw,130px) 0}
.band::before{content:"";position:absolute;inset:0;background:rgba(8,16,30,.62)}
.band .wrap{position:relative}
.band .lead{color:rgba(255,255,255,.85)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:center}
.split.rev .media{order:2}
.media img{border-radius:var(--radius);width:100%;object-fit:cover}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.feat>div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius);padding:34px 28px;backdrop-filter:blur(4px)}
.feat .num{font-size:14px;font-weight:800;color:#7cc7ff;letter-spacing:.1em}
.feat h3{font-size:22px;margin:8px 0}
.feat p{opacity:.85;font-size:15px}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.pill-list span{background:var(--bg2);padding:8px 16px;border-radius:999px;font-size:14px;font-weight:600;color:var(--brand)}

/* timeline */
.tl{position:relative;max-width:820px;margin:48px auto 0}
.tl::before{content:"";position:absolute;left:110px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-row{display:grid;grid-template-columns:110px 1fr;gap:36px;padding:18px 0;position:relative}
.tl-row::before{content:"";position:absolute;left:104px;top:28px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--brand)}
.tl-row b{font-size:26px;font-weight:800;color:var(--brand)}
.tl-row ul{list-style:none;padding-top:6px}
.tl-row li{font-size:17px;padding:3px 0}

/* products */
.prod .ph{aspect-ratio:1/1;background:#fff;cursor:zoom-in}
.prod .ph img{object-fit:contain;padding:8px}
.prod .tx{padding:16px 18px 20px;border-top:1px solid var(--line)}
.prod h3{font-size:17px}
.prod p{font-size:14px}
.logos{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.logos div{background:#fff;border:1px solid var(--line);border-radius:12px;aspect-ratio:1/1;display:grid;place-items:center;padding:12px}
.logos img{max-height:100%;object-fit:contain}
.gallery figure{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line)}
.gallery figure img{aspect-ratio:4/3;object-fit:cover;width:100%;cursor:zoom-in}
.gallery figcaption{padding:14px 18px;font-weight:600}
.certs{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:40px}
.certs img{border:1px solid var(--line);border-radius:8px;cursor:zoom-in;background:#fff}

/* greeting */
.greet{display:grid;grid-template-columns:420px 1fr;gap:64px;align-items:start}
.greet img{border-radius:var(--radius)}
.greet .letter p{margin-bottom:18px;font-size:17px;color:#333}
.greet .sign{margin-top:30px;font-weight:700;font-size:18px;text-align:right}

/* contact */
.cc{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cc>div{border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;background:#fff;display:flex;flex-direction:column;gap:10px}
.cc h3{font-size:21px}
.cc .big{font-size:28px;font-weight:800;color:var(--brand)}
.cc small{color:var(--sub)}
.cc .btn{align-self:flex-start;margin-top:auto}
.notice{border-top:2px solid var(--ink);margin-top:28px}
.notice a{display:flex;justify-content:space-between;gap:16px;padding:20px 8px;border-bottom:1px solid var(--line)}
.notice a:hover{color:var(--brand)}
.notice time{color:var(--sub);flex:none}
.map{border:0;width:100%;height:440px;border-radius:var(--radius);background:var(--bg2)}

/* footer */
.ft{background:var(--dark);color:rgba(255,255,255,.7);padding:56px 0 40px;font-size:14px}
.ft .top{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap}
.ft .flogo img{height:30px;filter:brightness(0) invert(1);opacity:.9}
.ft address{font-style:normal;margin-top:20px;line-height:1.9}
.ft .copy{margin-top:26px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;opacity:.6}
.ft .flinks{display:flex;gap:10px}
.ft .flinks a{padding:8px 16px;border:1px solid rgba(255,255,255,.2);border-radius:999px}
.ft .flinks a:hover{background:#fff;color:var(--ink)}

/* floating */
.fab{position:fixed;right:20px;bottom:20px;z-index:60;display:flex;flex-direction:column;gap:10px}
.fab a{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:12px;box-shadow:0 6px 20px rgba(0,0,0,.18)}
.fab .k{background:#fee500;color:#191919}
.fab .n{background:#03c75a;color:#fff}
.fab .t{background:var(--brand);color:#fff}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(0,0,0,.86);z-index:100;display:none;place-items:center;padding:24px;cursor:zoom-out}
.lb.on{display:grid}
.lb img{max-height:90vh;max-width:min(1000px,100%);border-radius:8px;background:#fff}

/* reveal */
.rv{opacity:0;transform:translateY(28px);transition:opacity .8s,transform .8s}
.rv.in{opacity:1;transform:none}

@media (max-width:1024px){
  .g4,.certs{grid-template-columns:repeat(3,1fr)}
  .logos{grid-template-columns:repeat(4,1fr)}
  .greet{grid-template-columns:1fr;gap:32px}
  .greet img{max-width:420px}
}
@media (max-width:860px){
  :root{--hh:64px}
  .gnb,.hd-sns{display:none}
  .burger{display:block}
  .logo img{height:28px}
  .mnav{display:block;position:fixed;top:var(--hh);left:0;right:0;bottom:0;background:#fff;z-index:49;overflow:auto;padding:12px 24px 40px;transform:translateX(100%);transition:.3s}
  .mnav.on{transform:none}
  .mnav details{border-bottom:1px solid var(--line)}
  .mnav summary{list-style:none;padding:18px 4px;font-weight:700;font-size:18px;cursor:pointer;display:flex;justify-content:space-between}
  .mnav summary::after{content:"+";color:var(--sub)}
  .mnav details[open] summary::after{content:"–"}
  .mnav details a{display:block;padding:10px 12px;color:var(--sub)}
  .mnav details div{padding-bottom:12px}
  .burger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.on span:nth-child(2){opacity:0}
  .burger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .g2,.g3,.split,.feat,.cc{grid-template-columns:1fr}
  .split.rev .media{order:0}
  .g4,.certs{grid-template-columns:repeat(2,1fr)}
  .logos{grid-template-columns:repeat(3,1fr)}
  .shero{height:260px}
  .lnb a{padding:14px 16px;font-size:15px}
  .tl::before{left:70px}
  .tl-row{grid-template-columns:70px 1fr;gap:28px}
  .tl-row::before{left:64px}
  .tl-row b{font-size:20px}
  .tl-row li{font-size:15px}
  .map{height:320px}
  .fab a{width:48px;height:48px}
}
@media (max-width:480px){
  .wrap{padding:0 16px}
  .gallery.g4{grid-template-columns:1fr 1fr}
}