/* 보일러분배기 — design system (saaspo/spade-inspired dark landing) */
:root{
  --bg:#080b10; --bg2:#0b1017; --surface:#0e141c; --surface2:#121a24;
  --line:rgba(255,255,255,.07); --line2:rgba(255,255,255,.12);
  --ink:#eaf0f8; --ink2:#aab6c8; --muted:#7d8a9c;
  --amber:#f0842b; --amber2:#ffb25a; --amber-ink:#1a0f04;
  --radius:18px; --radius-sm:12px; --maxw:1120px;
  --shadow:0 24px 60px -24px rgba(0,0,0,.75);
  --glow:0 0 0 1px rgba(240,132,43,.35), 0 18px 40px -12px rgba(240,132,43,.45);
  --font:"Pretendard","Pretendard Variable",-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic","Segoe UI",Roboto,"Noto Sans KR",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.65;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 500px at 78% -8%, rgba(240,132,43,.16), transparent 60%),
    radial-gradient(700px 500px at 5% 8%, rgba(56,120,220,.10), transparent 55%),
    linear-gradient(180deg,#080b10,#080b10 40%,#070a0f);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{letter-spacing:-.03em;line-height:1.15;margin:0}
p{margin:0}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:700;
  color:var(--amber2);background:rgba(240,132,43,.10);border:1px solid rgba(240,132,43,.28);
  padding:6px 13px;border-radius:999px;letter-spacing:.02em}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--amber);box-shadow:0 0 10px var(--amber)}
.muted{color:var(--ink2)}

/* header */
.site-head{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(8,11,16,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.03em;font-size:1.08rem}
.brand .logo{width:30px;height:30px;border-radius:8px;flex:0 0 auto}
.nav-links{display:flex;gap:4px;margin-left:8px;flex-wrap:wrap}
.nav-links a{padding:8px 12px;border-radius:10px;color:var(--ink2);font-size:.92rem;font-weight:600}
.nav-links a:hover{color:var(--ink);background:rgba(255,255,255,.05)}
.nav-cta{margin-left:auto;display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:11px;font-weight:700;font-size:.92rem;
  color:var(--amber-ink);background:linear-gradient(180deg,var(--amber2),var(--amber));box-shadow:var(--glow)}
.nav-cta:hover{filter:brightness(1.05)}
.nav-toggle{display:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 24px;border-radius:13px;font-weight:700;font-size:1rem;cursor:pointer;border:1px solid transparent;transition:.18s}
.btn-primary{color:var(--amber-ink);background:linear-gradient(180deg,var(--amber2),var(--amber));box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.05)}
.btn-ghost{color:var(--ink);background:rgba(255,255,255,.04);border-color:var(--line2)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}

/* hero */
.hero{position:relative;padding:76px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero h1{font-size:clamp(2.5rem,6vw,4.2rem);font-weight:800;margin:20px 0 0}
.hero h1 .grad{background:linear-gradient(120deg,var(--amber2),var(--amber));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:1.13rem;color:var(--ink2);margin-top:20px;max-width:30em}
.hero-cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.trust{display:flex;gap:22px;margin-top:28px;flex-wrap:wrap}
.trust .t{display:flex;flex-direction:column}
.trust .t b{font-size:1.5rem;font-weight:800;letter-spacing:-.03em}
.trust .t span{font-size:.85rem;color:var(--muted)}
.hero-media{position:relative}
.hero-media .frame{border-radius:22px;overflow:hidden;border:1px solid var(--line2);box-shadow:var(--shadow);
  aspect-ratio:4/5;background:var(--surface)}
.hero-media .frame img{width:100%;height:100%;object-fit:cover}
.hero-media .chip{position:absolute;left:-14px;bottom:26px;background:var(--surface2);
  border:1px solid var(--line2);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);display:flex;gap:11px;align-items:center}
.hero-media .chip .ic{width:38px;height:38px;border-radius:10px;background:rgba(240,132,43,.14);display:grid;place-items:center;font-size:1.2rem}
.hero-media .chip b{font-size:.95rem}.hero-media .chip span{font-size:.78rem;color:var(--muted)}

/* sections */
section{padding:64px 0}
.sec-head{max-width:640px;margin:0 auto 44px;text-align:center}
.sec-head h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800}
.sec-head p{color:var(--ink2);margin-top:14px;font-size:1.05rem}

/* keyword/service cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{position:relative;background:linear-gradient(180deg,var(--surface),var(--bg2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.2s;overflow:hidden}
.card:hover{border-color:rgba(240,132,43,.4);transform:translateY(-3px);box-shadow:var(--shadow)}
.card .kico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.4rem;
  background:rgba(240,132,43,.12);border:1px solid rgba(240,132,43,.25);margin-bottom:16px}
.card h3{font-size:1.22rem;font-weight:750}
.card p{color:var(--ink2);margin-top:9px;font-size:.96rem}
.card .more{margin-top:16px;display:inline-flex;align-items:center;gap:6px;color:var(--amber2);font-weight:700;font-size:.9rem}
.card:hover .more{gap:10px}

/* gallery */
.gallery{columns:4;column-gap:14px}
.gallery a{display:block;margin:0 0 14px;border-radius:14px;overflow:hidden;border:1px solid var(--line);
  break-inside:avoid;position:relative;background:var(--surface)}
.gallery img{width:100%;height:auto;transition:.35s}
.gallery a:hover img{transform:scale(1.05)}
.gallery a::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.35));opacity:0;transition:.25s}
.gallery a:hover::after{opacity:1}

/* feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split .media{border-radius:20px;overflow:hidden;border:1px solid var(--line2);box-shadow:var(--shadow)}
.split .media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.feat-list{display:flex;flex-direction:column;gap:16px;margin-top:24px}
.feat{display:flex;gap:14px}
.feat .fi{flex:0 0 auto;width:34px;height:34px;border-radius:9px;background:rgba(240,132,43,.13);display:grid;place-items:center;color:var(--amber2);font-weight:800}
.feat h4{margin:0;font-size:1.04rem;font-weight:700}
.feat p{color:var(--ink2);font-size:.94rem;margin-top:3px}

/* process steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px}
.step .n{counter-increment:s;font-size:.85rem;font-weight:800;color:var(--amber2)}
.step .n::before{content:"0" counter(s)}
.step h4{margin:10px 0 6px;font-size:1.08rem;font-weight:700}
.step p{color:var(--ink2);font-size:.92rem}

/* FAQ */
.faq{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px 20px}
.faq details[open]{border-color:rgba(240,132,43,.35)}
.faq summary{list-style:none;cursor:pointer;padding:18px 0;font-weight:700;font-size:1.05rem;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--amber2);font-weight:800;font-size:1.3rem;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--ink2);padding:0 0 20px;font-size:.98rem}

/* CTA band */
.cta-band{background:linear-gradient(120deg,rgba(240,132,43,.16),rgba(240,132,43,.04));
  border:1px solid rgba(240,132,43,.28);border-radius:24px;padding:52px;text-align:center;position:relative;overflow:hidden}
.cta-band h2{font-size:clamp(1.7rem,4vw,2.4rem);font-weight:800}
.cta-band p{color:var(--ink2);margin-top:12px}
.cta-band .hero-cta{justify-content:center;margin-top:26px}

/* article body (sub pages) */
.article{max-width:820px;margin:0 auto}
.article h2{font-size:1.65rem;font-weight:800;margin:44px 0 14px}
.article h3{font-size:1.22rem;font-weight:750;margin:28px 0 10px}
.article p{color:var(--ink2);margin:12px 0;font-size:1.02rem}
.article ul{color:var(--ink2);padding-left:20px;margin:12px 0}
.article li{margin:8px 0}
.article .callout{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--amber);
  border-radius:12px;padding:18px 22px;margin:24px 0}
.article strong{color:var(--ink)}

/* breadcrumb */
.crumb{font-size:.86rem;color:var(--muted);padding:22px 0 0;display:flex;gap:8px;flex-wrap:wrap}
.crumb a:hover{color:var(--ink2)}

/* footer */
.site-foot{border-top:1px solid var(--line);margin-top:40px;padding:52px 0 40px;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot-grid h5{color:var(--ink);font-size:.95rem;margin:0 0 14px;font-weight:700}
.foot-grid a{display:block;color:var(--ink2);font-size:.92rem;padding:5px 0}
.foot-grid a:hover{color:var(--amber2)}
.foot-bottom{margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.85rem}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(4,6,10,.92);z-index:100;display:none;place-items:center;padding:24px}
.lb.open{display:grid}
.lb img{max-width:92vw;max-height:88vh;border-radius:14px;box-shadow:var(--shadow)}
.lb-close{position:absolute;top:20px;right:24px;font-size:2rem;color:#fff;cursor:pointer;line-height:1}

@media(max-width:900px){
  .hero-grid,.split{grid-template-columns:1fr;gap:34px}
  .hero-media{order:-1}
  .cards{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .gallery{columns:3}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:var(--bg2);border-bottom:1px solid var(--line);padding:12px;margin:0}
  .nav-links.open{display:flex}
  .nav-toggle{display:inline-grid;place-items:center;margin-left:auto;width:42px;height:42px;
    border-radius:10px;background:rgba(255,255,255,.05);border:1px solid var(--line2);color:var(--ink);font-size:1.3rem;cursor:pointer}
  .nav-cta{margin-left:10px}
  .cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .gallery{columns:2}
  .cta-band{padding:34px 22px}
  section{padding:48px 0}
  .foot-grid{grid-template-columns:1fr}
}