/* ===== 디자인 토큰 ===== */
:root{
  --navy-900:#081627;
  --navy-800:#0b1f3a;
  --navy-700:#13294b;
  --ink:#0f1a2b;
  --slate:#4a5a70;
  --muted:#6b7a90;
  --line:#e5eaf1;
  --bg:#ffffff;
  --bg-alt:#f5f8fc;
  --brand:#1766ff;
  --brand-2:#17c0e8;
  --accent-grad:linear-gradient(100deg,#2b7bff 0%,#17c0e8 100%);
  --ring:rgba(23,102,255,.25);
  --shadow:0 10px 30px rgba(16,31,56,.08);
  --shadow-lg:0 24px 60px rgba(16,31,56,.14);
  --radius:16px;
  --maxw:1160px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Pretendard","Pretendard Variable",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.02em;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ===== 버튼 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4em;
  padding:.72em 1.25em;border-radius:999px;font-weight:600;font-size:.95rem;
  border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .2s ease,background .2s ease,color .2s ease;white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-lg{padding:.9em 1.6em;font-size:1.02rem}
.btn-primary{background:var(--accent-grad);color:#fff;box-shadow:0 8px 20px var(--ring)}
.btn-primary:hover{box-shadow:0 12px 28px var(--ring);transform:translateY(-1px)}
.btn-outline{border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.12)}
.btn-ghost{color:var(--navy-800);border-color:var(--line)}
.btn-ghost:hover{background:var(--bg-alt)}

/* ===== 헤더 ===== */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy-800)}
.brand-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:var(--accent-grad);color:#fff;font-size:.9rem;font-weight:800;letter-spacing:.02em;
}
.brand-text{font-size:1.06rem;letter-spacing:-.02em}
.brand-logo{height:38px;width:auto;display:block}
.nav-links{display:flex;gap:22px;margin-left:12px}
.nav-links a{font-weight:500;font-size:.95rem;color:var(--slate);padding:6px 0;position:relative}
.nav-links a:hover{color:var(--navy-800)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--brand);transition:width .2s}
.nav-links a:hover::after{width:100%}
.nav-actions{margin-left:auto;display:flex;gap:10px;align-items:center}
.lang-switch{display:inline-flex;align-items:center;font-size:.82rem;font-weight:600;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang-switch a{padding:6px 11px;color:var(--muted)}
.lang-switch a.active{background:var(--navy-800);color:#fff}
.lang-switch a:not(.active):hover{background:var(--bg-alt);color:var(--navy-800)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{width:24px;height:2px;background:var(--navy-800);border-radius:2px;transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 히어로 ===== */
.hero{position:relative;overflow:hidden;color:#eaf1ff;background:var(--navy-900)}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 500px at 80% -10%,rgba(23,192,232,.22),transparent 60%),
    radial-gradient(700px 500px at 0% 20%,rgba(43,123,255,.28),transparent 60%),
    linear-gradient(180deg,var(--navy-900),var(--navy-800));
}
.hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(600px 400px at 70% 10%,#000,transparent 75%);
}
.hero-inner{position:relative;padding:96px 24px 88px;max-width:980px}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:700;color:var(--brand-2);margin-bottom:16px}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.5rem);font-weight:800;letter-spacing:-.03em}
.grad{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:22px;font-size:1.08rem;color:#aebfd8;max-width:none}
.hero-cta{margin-top:32px;display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{margin-top:52px;display:flex;gap:40px;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{font-size:1.8rem;font-weight:800;color:#fff}
.hero-stats em{font-style:normal;font-size:1rem;color:var(--brand-2)}
.hero-stats span{font-size:.86rem;color:#8ea0bd;margin-top:2px}

/* ===== 섹션 공통 ===== */
.section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-head h2{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:800;color:var(--navy-800)}
.section-lead{margin-top:16px;color:var(--muted);font-size:1.05rem}
.section-head .eyebrow{color:var(--brand)}

/* ===== 그리드 ===== */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ===== 카드 ===== */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#d3e0f5}
.card.sm{padding:24px 22px}
.card-ico{font-size:1.7rem;width:52px;height:52px;border-radius:13px;display:grid;place-items:center;background:var(--bg-alt);margin-bottom:16px}
.card h3{font-size:1.18rem;color:var(--navy-800);margin-bottom:10px}
.card p{color:var(--slate);font-size:.97rem}

.cert-card{
  position:relative;background:var(--navy-800);color:#dce7fb;border-radius:var(--radius);
  padding:30px 26px;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;
}
.cert-card::before{content:"";position:absolute;inset:0;background:var(--accent-grad);opacity:0;transition:opacity .25s}
.cert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cert-card:hover::before{opacity:.12}
.cert-card h3{color:#fff;font-size:1.2rem;margin-bottom:12px;position:relative}
.cert-card p{position:relative;color:#aec3e6;font-size:.95rem}

/* ===== 강점 ===== */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;box-shadow:var(--shadow)}
.feature h3{color:var(--navy-800);font-size:1.22rem;margin-bottom:16px}
.ticks li{position:relative;padding-left:30px;margin:10px 0;color:var(--slate)}
.ticks li::before{content:"";position:absolute;left:0;top:.5em;width:16px;height:16px;border-radius:50%;background:var(--accent-grad);
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='white' d='M9 16.2l-3.5-3.5L4 14.2l5 5 11-11-1.5-1.5z'/%3E%3C/svg%3E") center/14px no-repeat;}

/* ===== 글로벌 밴드 ===== */
.band{background:var(--navy-800);color:#fff;position:relative;overflow:hidden}
.band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 50%,rgba(23,192,232,.25),transparent 60%)}
.band-inner{position:relative;text-align:center;padding:66px 24px}
.band h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800}
.band p{margin-top:14px;color:#b9cae6;max-width:none;margin-inline:auto}
.band-map{display:block;width:100%;max-width:920px;height:auto;margin:36px auto 0}

/* ===== 스텝 / 프로세스 ===== */
.steps{display:grid;gap:18px;max-width:860px;margin:0 auto}
.steps li{display:flex;gap:20px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow)}
.step-n{font-size:1.5rem;font-weight:800;color:var(--brand);min-width:48px}
.steps h3{color:var(--navy-800);font-size:1.12rem;margin-bottom:6px}
.steps p{color:var(--slate);font-size:.97rem}

.proc{text-align:center;padding:30px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.proc-n{display:grid;place-items:center;width:46px;height:46px;margin:0 auto 14px;border-radius:50%;background:var(--accent-grad);color:#fff;font-weight:800}
.proc h3{color:var(--navy-800);font-size:1.1rem;margin-bottom:6px}
.proc p{color:var(--slate);font-size:.95rem}

/* ===== 사례 ===== */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.tag{display:inline-block;font-size:.76rem;font-weight:700;color:var(--brand);background:rgba(23,102,255,.08);padding:4px 11px;border-radius:999px;margin-bottom:14px}
.case h3{color:var(--navy-800);font-size:1.12rem;margin-bottom:10px}
.case p{color:var(--slate);font-size:.96rem}
.note{text-align:center;margin-top:26px;color:var(--muted);font-size:.95rem}
#clients .section-head{max-width:940px}
#assessment .section-head,#process .section-head,#experts .section-head{max-width:880px}

/* ===== 고객사 로고 ===== */
.logo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:18px}
.logo-item{display:grid;place-items:center;height:100px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;box-shadow:var(--shadow)}
.logo-item img{max-height:100%;max-width:100%;width:auto;object-fit:contain;filter:grayscale(1);opacity:.72;transition:filter .25s ease,opacity .25s ease}
.logo-item:hover img{filter:none;opacity:1}
.logo-item.is-ph{background:var(--bg-alt);border-style:dashed}
.logo-item.is-ph span{color:#aab6c7;font-weight:800;letter-spacing:.14em;font-size:.78rem}

/* ===== CTA ===== */
.cta{background:var(--navy-900);color:#fff;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 360px at 50% -20%,rgba(43,123,255,.35),transparent 60%)}
.cta-inner{position:relative;text-align:center;padding:84px 24px}
.cta h2{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:800}
.cta p{margin-top:14px;color:#b9cae6}
.cta-actions{margin-top:30px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ===== 푸터 ===== */
.site-footer{background:#06101f;color:#9fb0c8;padding:62px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.footer-col h4{color:#fff;font-size:.98rem;margin-bottom:14px}
.footer-col p{font-size:.9rem;margin:8px 0;line-height:1.7}
.footer-brand .brand-text{color:#fff;font-size:1.1rem;font-weight:800;display:block;margin-bottom:12px}
.footer-logo{display:inline-block;background:#fff;padding:9px 13px;border-radius:12px;margin-bottom:14px}
.footer-logo img{height:34px;width:auto;display:block}
.footer-brand p{font-size:.9rem}
.footer-col a:hover{color:var(--brand-2)}
.partners li{font-size:.88rem;margin:7px 0}
.footer-bottom{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);font-size:.84rem;color:#6d7f98}

/* ===== 맨 위로 ===== */
.to-top{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;
  background:var(--navy-800);color:#fff;display:grid;place-items:center;font-size:1.2rem;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transform:translateY(10px);transition:.25s;z-index:40;
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}

/* ===== 스크롤 리빌 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ===== 반응형 ===== */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav-links{
    position:fixed;inset:68px 0 auto 0;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 16px;
    transform:translateY(-130%);transition:transform .28s ease;box-shadow:var(--shadow);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-actions{gap:8px;margin-left:auto}
  .nav-actions .btn{display:none}
  .nav-toggle{display:flex;margin-left:8px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .section{padding:62px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero-inner{padding:72px 24px 64px}
  .hero-stats{gap:26px}
  .footer-grid{grid-template-columns:1fr}
  .steps li{flex-direction:column;gap:8px}
}