/* SEVION — shared design system */
:root{
  --ink:#0A1633; --navy:#0E1B3D; --navy2:#12305A; --navy3:#163A6B;
  --slate:#4A5573; --muted:#7E8AB0; --muted2:#9AA5C6;
  --line:#D7DEEA; --line2:#E2E7F1; --paper:#F4F6FB; --white:#FFFFFF;
  --mint:#34E4B4; --blue:#2F6BFF;
  --f:"Pretendard Variable",Pretendard,-apple-system,"Malgun Gothic",sans-serif;
  --mono:ui-monospace,"SFMono-Regular","Cascadia Mono",Menlo,monospace;
  --wrap:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--f);color:var(--slate);background:var(--white);line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);font-weight:600}
h1,h2,h3,h4{color:var(--navy);font-weight:800;letter-spacing:-.02em;line-height:1.22}
.mint{color:var(--mint)} .blue{color:var(--blue)}
a{color:inherit;text-decoration:none}
p{font-size:16px}
.center{text-align:center}
.pw{width:20px;height:20px;flex:0 0 auto}
.glow{animation:glow 3.4s ease-in-out infinite}
@keyframes glow{0%,100%{filter:drop-shadow(0 0 0 rgba(52,228,180,0))}50%{filter:drop-shadow(0 0 10px rgba(52,228,180,.65))}}

/* NAV */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,22,51,.9);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;letter-spacing:.02em;font-size:18px}
.nav-links{display:flex;gap:26px;align-items:center;margin-left:auto}
.nav-links a{color:#C7D0E4;font-size:15px;font-weight:600;transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:var(--mint)}
.navcta{font-size:14px;font-weight:700;color:var(--ink)!important;background:var(--mint);
  padding:9px 16px;border-radius:999px;transition:transform .15s,box-shadow .15s}
.navcta:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(52,228,180,.35);color:var(--ink)!important}
.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:24px;cursor:pointer;padding:4px}
@media(max-width:820px){
  .nav-links{position:fixed;inset:64px 0 auto 0;flex-direction:column;background:var(--ink);
    padding:18px 24px;gap:16px;border-bottom:1px solid rgba(255,255,255,.08);
    transform:translateY(-140%);transition:transform .28s ease;align-items:flex-start}
  .nav-links.open{transform:none}
  .nav-toggle{display:block}
}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;
  padding:14px 24px;border-radius:999px;transition:transform .15s,box-shadow .15s;cursor:pointer;border:0}
.btn-primary{background:var(--mint);color:var(--ink)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(52,228,180,.4)}
.btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.28);background:transparent}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(14,27,61,.28)}

/* HERO (home) */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden;padding:100px 0 116px}
.hero .orb{position:absolute;border-radius:50%;opacity:.7;pointer-events:none}
.hero .orb.a{width:520px;height:520px;right:-140px;top:-160px;background:radial-gradient(circle at 30% 30%,#16305c,#0d1c3d)}
.hero .orb.b{width:360px;height:360px;left:-120px;bottom:-160px;background:radial-gradient(circle at 60% 40%,#14274f,#0b1836)}
.hero .wrap{position:relative;z-index:2}
.hero .eyebrow{color:var(--muted2)}
.hero h1{color:#fff;font-size:clamp(38px,6.2vw,70px);margin:18px 0 0}
.hero h1 .l2{display:block}
.hero p.sub{max-width:620px;margin:22px 0 34px;font-size:clamp(16px,2.2vw,19px);color:#C7D0E4;line-height:1.75}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.signature{position:absolute;right:24px;bottom:40px;z-index:2;text-align:right;color:#9fb0d0;font-size:14px;line-height:1.5}
.signature .on{color:var(--mint);font-weight:800}
.power-badge{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;
  border-radius:50%;margin-bottom:12px;border:1.5px solid rgba(52,228,180,.4);background:rgba(52,228,180,.06)}
.power-badge svg{width:26px;height:26px;color:var(--mint)}

/* PAGE HERO (subpages) */
.page-hero{background:var(--ink);color:#fff;padding:72px 0 60px;position:relative;overflow:hidden}
.page-hero .orb{position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,#153263,#0b1836);opacity:.55;right:-120px;top:-140px;pointer-events:none}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:clamp(30px,4.6vw,46px);margin:12px 0 0}
.page-hero p{color:#9fb0d0;margin-top:14px;max-width:640px;font-size:17px}

/* SECTION */
section.blk{padding:84px 0}
.blk.light{background:#fff}.blk.paper{background:var(--paper)}
.blk.dark{background:var(--navy);color:#C7D0E4}
.blk.dark h2,.blk.dark h3,.blk.dark h4{color:#fff}
.head{max-width:760px;margin-bottom:42px}
.head h2{font-size:clamp(26px,3.6vw,38px);margin:12px 0 0}
.head p{margin-top:14px;font-size:17px;color:var(--muted)}
.blk.dark .head p{color:#9fb0d0}

/* GRID + CARDS */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;
  box-shadow:0 10px 30px rgba(16,27,61,.05)}
.card h3{font-size:20px;margin-bottom:10px}
.card p{font-size:15.5px;color:var(--slate)}
.tag{display:inline-flex;align-items:center;gap:8px;font-weight:800;color:var(--navy);font-size:19px;margin-bottom:12px}
.dot{width:26px;height:26px;border-radius:50%;background:var(--navy);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.dot.mint{background:var(--mint);color:var(--ink)}
.price{font-family:var(--mono);font-size:14px;color:var(--blue);letter-spacing:.03em;margin:2px 0 12px;font-weight:600}
.assume{font-size:12.5px;color:var(--muted)}

/* STEPS */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:24px 20px}
.step .n{width:40px;height:40px;border-radius:50%;background:var(--mint);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:13.5px;color:#a9b6d4;line-height:1.6}
.step.key{background:linear-gradient(160deg,#123061,#0e1f42);border-color:rgba(52,228,180,.35)}

/* FROM-TO */
.fromto{display:grid;grid-template-columns:1fr 60px 1fr;align-items:center;gap:10px}
.ft{border-radius:16px;padding:26px}
.ft.from{background:var(--paper);border:1px solid var(--line)}
.ft.to{background:var(--navy);color:#cdd7ee;border:1px solid var(--navy3)}
.ft .lab{font-family:var(--mono);font-size:12px;letter-spacing:.2em;font-weight:700;margin-bottom:14px;display:block}
.ft.from .lab{color:var(--muted)}.ft.to .lab{color:var(--mint)}
.ft ul{list-style:none}.ft li{padding:8px 0 8px 22px;position:relative;font-size:15px}
.ft li::before{content:"";position:absolute;left:0;top:15px;width:9px;height:9px;border-radius:50%}
.ft.from li::before{background:var(--muted2)}.ft.to li{color:#dbe4f6}.ft.to li::before{background:var(--mint)}
.arrow{display:flex;align-items:center;justify-content:center;color:var(--blue);font-size:28px;font-weight:800}

/* KEY CALLOUT */
.keybox{background:var(--navy);border-radius:16px;padding:28px 30px;color:#fff;
  box-shadow:0 10px 30px rgba(14,27,61,.14)}
.keybox .klab{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--mint);font-weight:700}
.keybox p{color:#fff;font-size:19px;font-weight:700;margin-top:8px}

/* STAT GRID */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center}
.stat .num{font-size:30px;font-weight:800;color:var(--navy);letter-spacing:-.02em}
.stat .num .u{font-size:16px;color:var(--blue)}
.stat .lab{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.4}
.src{font-size:12px;color:var(--muted);margin-top:16px}

/* LIST (method aspects) */
.deflist{display:grid;grid-template-columns:130px 1fr;gap:6px 14px;font-size:15px}
.deflist dt{font-weight:700;color:var(--navy)}
.deflist dd{color:var(--slate)}

/* ARTICLES */
.articles{display:grid;gap:18px}
.article{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.article summary{list-style:none;cursor:pointer;padding:26px 28px;display:flex;gap:16px;align-items:flex-start;transition:background .15s}
.article summary::-webkit-details-marker{display:none}
.article summary:hover{background:var(--paper)}
.article .meta{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--blue);text-transform:uppercase}
.article h3{font-size:19px;margin:6px 0 6px}
.article .excerpt{font-size:14.5px;color:var(--muted)}
.article .chev{margin-left:auto;color:var(--mint);font-size:20px;flex:0 0 auto;transition:transform .2s}
.article[open] .chev{transform:rotate(90deg)}
.article .body{padding:0 28px 28px;color:var(--slate);font-size:15px}
.article .body p{margin-bottom:12px;font-size:15px}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--navy);margin-bottom:6px}
.field input,.field textarea{width:100%;border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;font-family:var(--f);font-size:15px;color:var(--ink);background:#fff}
.field input:focus,.field textarea:focus{outline:2px solid var(--mint);border-color:transparent}
.contact-info{background:var(--navy);color:#cdd7ee;border-radius:16px;padding:30px}
.contact-info h3{color:#fff;margin-bottom:14px}
.contact-info .row{display:flex;gap:10px;padding:8px 0;font-size:15px}
.contact-info .row b{color:var(--mint);font-weight:700;min-width:70px}

/* CTA BAND */
.cta-band{background:var(--ink);color:#fff;text-align:center;padding:96px 0;position:relative;overflow:hidden}
.cta-band .orb{position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,#153263,#0b1836);opacity:.6}
.cta-band .orb.l{left:-140px;top:-120px}.cta-band .orb.r{right:-140px;bottom:-120px}
.cta-band .inner{position:relative;z-index:2}
.cta-band h2{color:#fff;font-size:clamp(28px,4.2vw,46px)}
.cta-band p{color:#9fb0d0;margin:16px auto 30px;max-width:520px}
.cta-band .mailnote{margin-top:18px;font-size:13px;color:#7e8ab0}

/* FOOTER */
footer{background:var(--navy);color:#9fb0d0;padding:44px 0 30px;border-top:1px solid rgba(255,255,255,.07)}
.foot-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:22px}
.foot-brand{color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;gap:9px}
.foot-brand+p{margin-top:10px;font-size:14px;max-width:280px}
.foot-col h4{color:#fff;font-size:13px;letter-spacing:.05em;margin-bottom:10px}
.foot-col a{display:block;color:#9fb0d0;font-size:14px;padding:4px 0}
.foot-col a:hover{color:var(--mint)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:18px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* REVEAL */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}.glow{animation:none}}

/* RESPONSIVE */
@media(max-width:860px){
  .grid2,.grid3,.contact-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .fromto{grid-template-columns:1fr}.arrow{transform:rotate(90deg);height:40px}
  .signature{position:static;text-align:left;margin-top:36px}
}
@media(max-width:520px){.steps,.stat-grid{grid-template-columns:1fr}section.blk{padding:64px 0}}