/* ==========================================================================
   올리브시스템즈 — Engineering Trust Design System
   ========================================================================== */
:root{
  --ink:#0B1220;          /* deep navy ink */
  --ink-2:#111A2E;
  --gray:#5B6478;
  --gray-l:#8890A0;
  --soft:#F3F6FB;
  --line:#E4E8F0;
  --blue:#2563EB;
  --blue-d:#1E40AF;
  --teal:#7C3AED;
  --amber:#F59E0B;
  --grad:linear-gradient(100deg,#2563EB,#7C3AED 55%,#DB2777);
  --grad-2:linear-gradient(120deg,#0B1220,#16233F 60%,#1E3A8A);
  --shadow-sm:0 8px 24px -12px rgba(11,18,32,.12);
  --shadow-md:0 24px 60px -20px rgba(11,18,32,.22);
  --font-display:'Space Grotesk','Pretendard Variable',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Pretendard Variable',Pretendard,sans-serif;color:var(--ink);background:#fff;line-height:1.7;letter-spacing:-.01em;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
section{padding:130px 0}
::selection{background:var(--blue);color:#fff}
button{font-family:inherit}

.label{display:inline-block;font-family:var(--font-display);font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--blue-d);margin-bottom:16px;background:#EAF1FF;border:1px solid #D3E2FF;padding:7px 16px;border-radius:999px}
h2{font-size:clamp(32px,4.6vw,52px);font-weight:800;letter-spacing:-.03em;line-height:1.2;margin-bottom:18px;font-family:'Pretendard Variable',sans-serif}
.gtx{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--gray);font-size:17.5px;max-width:640px;font-weight:400}
.fade{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.16,.7,.2,1),transform .8s cubic-bezier(.16,.7,.2,1)}
.fade.on{opacity:1;transform:none}

/* progress bar */
.progress-bar{position:fixed;top:0;left:0;height:3px;background:var(--grad);z-index:100;width:0%;transition:width .1s linear}

/* ===== nav ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:.35s}
nav.solid{background:rgba(255,255,255,.85);backdrop-filter:saturate(1.6) blur(18px);border-bottom:1px solid rgba(11,18,32,.06);box-shadow:0 4px 24px rgba(11,18,32,.04)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1180px;margin:0 auto;padding:0 28px}
.logo{font-weight:800;font-size:17px;letter-spacing:-.02em;display:flex;align-items:center;gap:9px;font-family:var(--font-display)}
.logo .dot{width:28px;height:28px;border-radius:8px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.menu{display:flex;gap:34px;font-size:14px;font-weight:500;color:#3A4257}
.menu a{transition:.25s;position:relative}
.menu a:hover{color:var(--blue)}
.menu a::after{content:"";position:absolute;left:0;bottom:-7px;width:100%;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .32s cubic-bezier(.2,.7,.2,1)}
.menu a:hover::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px}
.cta-s{background:var(--ink);color:#fff;font-weight:600;font-size:13.5px;padding:11px 22px;border-radius:999px;transition:.25s}
.cta-s:hover{background:var(--blue)}
nav:not(.solid) .logo{color:#fff}
nav:not(.solid) .menu{color:rgba(255,255,255,.85)}
nav:not(.solid) .cta-s{background:rgba(255,255,255,.14);backdrop-filter:blur(6px)}

/* hamburger (mobile) */
.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:38px;height:38px;border:none;background:transparent;cursor:pointer;z-index:70}
.hamburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s;margin:0 auto}
nav:not(.solid) .hamburger span{background:#fff}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.hamburger.open span{background:var(--ink) !important}

.mobile-menu{position:fixed;top:0;right:-320px;width:300px;max-width:82vw;height:100vh;background:#fff;z-index:65;box-shadow:-20px 0 60px rgba(11,18,32,.18);transition:right .38s cubic-bezier(.2,.8,.2,1);display:flex;flex-direction:column;padding:100px 32px 40px;gap:6px}
.mobile-menu.open{right:0}
.mobile-menu a{padding:14px 4px;font-size:16px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-menu .btn{margin-top:20px;text-align:center}
.mobile-backdrop{position:fixed;inset:0;background:rgba(11,18,32,.4);backdrop-filter:blur(2px);z-index:64;opacity:0;pointer-events:none;transition:opacity .35s}
.mobile-backdrop.open{opacity:1;pointer-events:auto}

/* ===== hero ===== */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;position:relative;overflow:hidden;padding:120px 28px 90px;background:radial-gradient(1200px 700px at 50% 112%,#16233F 0%,#0B1220 48%,#060A14 100%)}
#netbg{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.hbg{position:absolute;inset:0;z-index:0;overflow:hidden}
.hbg img{width:100%;height:100%;object-fit:cover;filter:saturate(.8) brightness(.5) contrast(1.05);animation:kb 26s ease-in-out infinite alternate}
@keyframes kb{from{transform:scale(1.02)}to{transform:scale(1.1)}}
.hbg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,20,.55),rgba(11,18,32,.42) 50%,#060A14 97%)}
@media (prefers-reduced-motion: reduce){.hbg img{animation:none}}
body::after{content:"";position:fixed;inset:0;z-index:99;pointer-events:none;opacity:.03;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E")}
.hero-in{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center}
.hero .eyebrow{font-size:14px;font-weight:600;color:#C7CEE0;margin-bottom:26px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);backdrop-filter:blur(6px);padding:8px 18px;border-radius:999px}
.hero .eyebrow b{color:#7FA8FF}
.hero h1{font-size:clamp(40px,6.8vw,80px);font-weight:800;letter-spacing:-.04em;line-height:1.14;margin-bottom:28px;color:#fff;font-family:'Pretendard Variable',sans-serif}
.hero p{color:#9AA3BC;font-size:clamp(16px,1.6vw,19.5px);max-width:580px;margin:0 auto 42px}
.hero p b{color:#fff;font-weight:700}
.hero-btns{display:flex;align-items:center}
.btn{display:inline-flex;align-items:center;gap:9px;padding:16px 32px;border-radius:999px;font-weight:700;font-size:16px;transition:all .28s cubic-bezier(.2,.7,.2,1)}
.btn i{font-size:13px;transition:transform .28s}
.btn:hover i{transform:translateX(3px)}
.btn-k{background:var(--grad);color:#fff}
.btn-k:hover{transform:translateY(-2px);box-shadow:0 18px 40px -10px rgba(46,107,255,.45)}
.btn-k:active{transform:scale(.96)}
.btn-w{border:1px solid rgba(255,255,255,.32);background:transparent;color:#fff;margin-left:12px}
.btn-w:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:58px}
.chip{font-size:13px;font-weight:600;color:#C7CEE0;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.05);padding:9px 18px 9px 14px;border-radius:999px;display:inline-flex;align-items:center;gap:8px}
.chip i{color:#7FA8FF;font-size:12px}
.scroll-cue{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);z-index:2;color:rgba(255,255,255,.55);font-size:18px;animation:bob 2.2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ===== statement ===== */
.statement{background:radial-gradient(950px 460px at 50% -5%,#16233F,var(--ink) 62%);color:#fff;text-align:center;padding:130px 28px 170px}
.statement p{font-size:clamp(21px,3.1vw,34px);font-weight:300;line-height:1.65;letter-spacing:-.02em}
.statement b{font-weight:800}
.statement .gtx{font-weight:800}

/* ===== bento services ===== */
.services{background:var(--soft);border-radius:44px 44px 0 0;margin-top:-52px;position:relative;z-index:3}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:18px;margin-top:60px}
.card{background:#fff;border:1px solid rgba(11,18,32,.05);border-radius:22px;padding:32px 30px 34px;position:relative;overflow:hidden;transition:transform .4s cubic-bezier(.2,.7,.2,1),box-shadow .4s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.card .icon{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:18px;background:#EAF1FF;color:var(--blue);transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.card:hover .icon{transform:translateY(-4px) scale(1.06)}
.card h3{font-size:21px;font-weight:800;letter-spacing:-.02em;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--gray);flex:1}
.card .kpi{margin-top:22px;display:flex;gap:22px}
.card .kpi b{display:block;font-family:var(--font-display);font-size:22px;font-weight:700;letter-spacing:-.01em}
.card .kpi b.c{color:var(--blue)}
.card .kpi span{font-size:11.5px;color:var(--gray)}
.c-a{grid-column:span 4}
.c-b{grid-column:span 2}
.c-dark{grid-column:span 2;background:var(--ink);color:#fff;border:none}
.c-dark p{color:#9AA3BC}
.c-dark .icon{background:rgba(255,255,255,.1);color:#7FA8FF}
.c-grad{grid-column:span 4;background:var(--grad);color:#fff;border:none;justify-content:center}
.c-grad .icon{background:rgba(255,255,255,.18);color:#fff}
.c-grad h3{font-size:26px}
.c-grad p{color:rgba(255,255,255,.88)}
.c-grad a{margin-top:20px;align-self:flex-start;background:#fff;color:var(--ink);font-weight:700;font-size:14px;padding:12px 24px;border-radius:999px;transition:.25s;display:inline-flex;align-items:center;gap:8px}
.c-grad a:hover{transform:translateY(-2px);gap:12px}

.card .ph{position:relative;height:170px;border-radius:14px;overflow:hidden;margin-bottom:20px}
.card .ph img{width:100%;height:100%;object-fit:cover;display:block;filter:saturate(.92) contrast(1.03);transition:transform .65s cubic-bezier(.2,.7,.2,1)}
.card .ph::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(46,107,255,.22),rgba(20,184,166,.14) 60%,rgba(11,18,32,.18));mix-blend-mode:multiply}
.card:hover .ph img{transform:scale(1.07)}

/* ===== stats ===== */
.stats-section{background:#fff}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:56px}
.stat{background:var(--soft);border-radius:22px;padding:34px 28px;transition:transform .3s}
.stat:hover{transform:translateY(-4px)}
.stat b{display:block;font-family:var(--font-display);font-size:clamp(34px,3.8vw,50px);font-weight:700;letter-spacing:-.02em;line-height:1.05}
.stat b em{font-style:normal;font-size:.5em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-left:2px}
.stat>span{display:block;color:var(--gray);font-size:14px;margin-top:10px;font-weight:500}

/* ===== results ===== */
.results{background:var(--soft)}
.num-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:56px}
.numc{background:#fff;border:1px solid rgba(11,18,32,.05);border-radius:18px;padding:26px 14px;text-align:center;transition:transform .3s,box-shadow .3s}
.numc:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.numc b{display:block;font-family:var(--font-display);font-size:24px;font-weight:700;letter-spacing:-.01em}
.numc.c b{color:var(--blue)}
.numc span{font-size:12px;color:var(--gray);font-weight:500}
.groupbox{margin-top:40px;background:var(--ink);border-radius:22px;color:#fff;padding:40px 44px;display:flex;gap:26px;align-items:center;flex-wrap:wrap;box-shadow:var(--shadow-md)}
.groupbox .badge{width:56px;height:56px;border-radius:18px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:22px;flex-shrink:0;color:#fff}
.groupbox p{color:#B4BCD1;font-size:15.5px;max-width:760px}
.groupbox b{color:#fff;font-weight:700}

/* ===== about ===== */
.vals{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px}
.val{border:1px solid var(--line);border-radius:20px;padding:30px 26px;transition:.3s}
.val:hover{border-color:var(--blue);transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.val-ic{width:42px;height:42px;border-radius:12px;background:#EAF1FF;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:17px;margin-bottom:16px}
.val b{display:block;font-size:18px;font-weight:800;margin-bottom:8px}
.val span{font-size:13.5px;color:var(--gray)}
.timeline{margin-top:70px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tl{background:var(--soft);border-radius:20px;padding:30px 26px}
.tl b{display:block;font-family:var(--font-display);font-size:24px;font-weight:700;letter-spacing:-.01em;margin-bottom:8px}
.tl.now{background:var(--ink);color:#fff}
.tl.now b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.tl p{font-size:13.5px;color:var(--gray)}
.tl.now p{color:#B4BCD1}

/* ===== infra ===== */
.inf-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:56px}
.inf{border-radius:24px;padding:44px 40px;min-height:320px;display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden;color:#fff;box-shadow:var(--shadow-md)}
.inf .bg{position:absolute;inset:0;z-index:0}
.inf .bg img{width:100%;height:100%;object-fit:cover;filter:saturate(.9) brightness(.72);transition:transform .8s ease}
.inf:hover .bg img{transform:scale(1.06)}
.inf.hq::before{background:linear-gradient(180deg,rgba(11,18,32,.15) 10%,rgba(11,18,32,.94) 80%),linear-gradient(120deg,rgba(30,58,138,.35),transparent 60%)}
.inf.hub::before{background:linear-gradient(180deg,rgba(11,18,32,.15) 10%,rgba(11,18,32,.94) 80%),linear-gradient(120deg,rgba(20,184,166,.3),transparent 60%)}
.inf::before{content:"";position:absolute;inset:0;z-index:1}
.inf .en,.inf h3,.inf ul{position:relative;z-index:2}
.inf .en{font-family:var(--font-display);font-size:11.5px;font-weight:700;letter-spacing:.22em;color:#7FA8FF;margin-bottom:10px}
.inf.hub .en{color:#5EEAD4}
.inf h3{font-size:24px;font-weight:800;letter-spacing:-.02em;margin-bottom:16px}
.inf li{list-style:none;font-size:14px;color:#C7CEE0;padding:4px 0 4px 20px;position:relative}
.inf li::before{content:"";position:absolute;left:2px;top:13px;width:6px;height:6px;border-radius:50%;background:var(--grad)}

/* ===== FAQ ===== */
.faq{background:var(--soft)}
.faq-list{margin-top:52px;display:flex;flex-direction:column;gap:14px;max-width:820px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:border-color .25s}
.faq-item:hover{border-color:#C7D6FF}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 26px;background:none;border:none;cursor:pointer;text-align:left;font-size:16px;font-weight:700;color:var(--ink)}
.faq-q i{color:var(--blue);transition:transform .3s cubic-bezier(.2,.7,.2,1);flex-shrink:0}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(.2,.7,.2,1)}
.faq-a p{padding:0 26px 24px;color:var(--gray);font-size:14.5px}

/* ===== cta band ===== */
.ctaband{text-align:center;padding:150px 28px;position:relative;overflow:hidden;color:#fff}
.ctaband .bg{position:absolute;inset:0;z-index:0}
.ctaband .bg img{width:100%;height:100%;object-fit:cover;filter:saturate(.85) brightness(.62)}
.ctaband::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(120deg,rgba(11,18,32,.88),rgba(23,67,184,.55))}
.ctaband>.wrap{position:relative;z-index:2}
.ctaband p.big{font-size:clamp(28px,4.2vw,50px);font-weight:800;letter-spacing:-.03em;line-height:1.28;margin-bottom:40px}
.ctaband .btn-k{background:#fff;color:var(--ink);background-image:none}
.ctaband .btn-k:hover{background:var(--blue);color:#fff}

/* ===== contact (dark) ===== */
.contact{background:var(--ink);color:#fff;border-radius:40px 40px 0 0}
.contact h2{color:#fff}
.contact .sub{color:#9AA3BC}
.c-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:56px;margin-top:56px}
.c-info div{margin-bottom:28px}
.c-info b{display:flex;align-items:center;gap:8px;font-size:11.5px;letter-spacing:.16em;color:#7FA8FF;margin-bottom:8px;font-weight:700}
.c-info p{font-size:18px;font-weight:600}
.c-info small{color:#9AA3BC;font-size:13.5px}
form{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:24px;padding:40px}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
form label{display:block;font-size:13px;font-weight:700;margin:16px 0 7px;color:#D9DCE8}
form input,form select,form textarea{width:100%;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:#fff;border-radius:12px;padding:13px 15px;font-size:14.5px;font-family:inherit;transition:border-color .2s,background .2s}
form select option{color:#111}
form ::placeholder{color:#6B7387}
form input:focus,form textarea:focus,form select:focus{outline:none;border-color:var(--blue);background:rgba(46,107,255,.08)}
form input.invalid,form textarea.invalid{border-color:#F87171;background:rgba(248,113,113,.08)}
.err{display:block;font-size:12px;color:#F87171;margin-top:5px;min-height:14px}
form button{margin-top:26px;width:100%;background:var(--grad);color:#fff;font-weight:800;font-size:15.5px;padding:16px;border:none;border-radius:999px;cursor:pointer;transition:.3s;position:relative}
form button:hover{box-shadow:0 14px 40px rgba(20,184,166,.35);transform:translateY(-2px)}
form button:active{transform:scale(.97)}
form button:disabled{opacity:.7;cursor:not-allowed;transform:none}
.demo-note{font-size:12.5px;color:#9AA3BC;margin-top:14px;text-align:center}

footer{background:var(--ink);color:#606A80;font-size:13px;padding:40px 0;border-top:1px solid rgba(255,255,255,.08)}
.f-in{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ===== back to top ===== */
.back-top{position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;background:var(--ink);color:#fff;border:none;font-size:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(10px);transition:.3s;z-index:40;box-shadow:var(--shadow-md)}
.back-top.show{opacity:1;pointer-events:auto;transform:none}
.back-top:hover{background:var(--blue)}

/* ===== misc polish ===== */
body::after{content:"";position:fixed;inset:0;z-index:99;pointer-events:none;opacity:.025;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E")}
.stat b,.numc b,.card .kpi b,.tl b{font-feature-settings:'tnum'}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent);opacity:.85;pointer-events:none}
.numc,.val,.tl,.inf,.stat{will-change:transform}
@media (prefers-reduced-motion: reduce){.fade{transition:none;opacity:1;transform:none}}

/* ===== responsive ===== */
@media(max-width:920px){
  .bento{grid-template-columns:1fr 1fr}
  .c-a,.c-b,.c-dark,.c-grad{grid-column:span 2}
  .stat-grid,.vals,.timeline{grid-template-columns:repeat(2,1fr)}
  .num-grid{grid-template-columns:repeat(3,1fr)}
  .c-grid,.inf-grid{grid-template-columns:1fr}
  .menu{display:none}
  .hamburger{display:flex}
  section{padding:90px 0}
}
@media(max-width:560px){
  .bento,.vals,.timeline{grid-template-columns:1fr}
  .c-a,.c-b,.c-dark,.c-grad{grid-column:span 1}
  .num-grid,.stat-grid{grid-template-columns:repeat(2,1fr)}
  form .row{grid-template-columns:1fr}
  .btn-w{margin-left:0;margin-top:10px}
  .hero-btns{flex-direction:column;gap:10px}
  .btn-w{margin-left:0}
  .groupbox{padding:30px 26px}
  .back-top{right:16px;bottom:16px;width:44px;height:44px}
}