:root{
  --bg:#F7F8FC; --surface:#FFFFFF; --ink:#151A3D; --muted:#5A6082; --line:#E3E6F2;
  --brand:#2B3AA8; --brand2:#6A3FD1; --accent:#14BFB2; --spark:#FFC94D;
  --word:#1C2260; --word2:#5B5FA8;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0C0F24; --surface:#151A36; --ink:#EEF0FF; --muted:#A4A9CC; --line:#262C52;
    --brand:#6F7EFF; --brand2:#9B74FF; --accent:#2DE0D2; --word:#EEF0FF; --word2:#A4A9F0;
  }
}
:root[data-theme="dark"]{
  --bg:#0C0F24; --surface:#151A36; --ink:#EEF0FF; --muted:#A4A9CC; --line:#262C52;
  --brand:#6F7EFF; --brand2:#9B74FF; --accent:#2DE0D2; --word:#EEF0FF; --word2:#A4A9F0;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:'Pretendard','Noto Sans KR',sans-serif;line-height:1.65;word-break:keep-all}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:12px}
.logo svg{width:40px;height:40px}
.logo b{font-size:20px;font-weight:800;color:var(--word);letter-spacing:-.3px;display:block;line-height:1.1}
.logo small{font-size:10px;font-weight:700;color:var(--word2);letter-spacing:2.6px}
nav a{margin-left:28px;font-size:15px;font-weight:500;color:var(--muted)}
nav a:hover{color:var(--brand)}
.hero{padding:96px 0 88px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;right:-160px;top:-120px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,color-mix(in srgb,var(--brand2) 28%,transparent),transparent 65%)}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1.5px;margin-bottom:18px}
h1{font-size:clamp(32px,5.2vw,56px);line-height:1.25;font-weight:800;letter-spacing:-1.2px;max-width:760px;position:relative}
h1 em{font-style:normal;background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin-top:22px;font-size:18px;color:var(--muted);max-width:600px;position:relative}
.cta{margin-top:36px;display:flex;gap:12px;flex-wrap:wrap;position:relative}
.btn{display:inline-block;padding:14px 26px;border-radius:12px;font-weight:700;font-size:15px}
.btn.p{background:linear-gradient(90deg,var(--brand),var(--brand2));color:#fff}
.btn.s{border:1px solid var(--line);background:var(--surface)}
section{padding:84px 0}
.sec-h{margin-bottom:40px}
.sec-h span{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1.5px}
.sec-h h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;letter-spacing:-.8px;margin-top:6px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:28px}
.ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand)}
.ic svg{width:24px;height:24px}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.card p{font-size:15px;color:var(--muted)}
.tag{display:inline-block;font-size:12px;font-weight:600;color:var(--word2);margin-bottom:10px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.step{border-top:3px solid var(--brand);padding-top:18px}
.step::before{counter-increment:s;content:"0" counter(s);font-size:14px;font-weight:800;color:var(--brand)}
.step h3{font-size:18px;margin:6px 0}
.step p{font-size:15px;color:var(--muted)}
.hd-r{display:flex;align-items:center}
.lang{margin-left:24px;font-size:13px;font-weight:700;color:var(--muted);border:1px solid var(--line);border-radius:8px;padding:5px 11px}
.lang:hover{color:var(--brand);border-color:var(--brand)}
.contact{background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;border-radius:24px;padding:48px;
  display:grid;grid-template-columns:1fr 1.35fr;gap:40px;align-items:start}
.contact h2{font-size:clamp(24px,3vw,32px);font-weight:800;letter-spacing:-.6px;line-height:1.3}
.contact .intro p{opacity:.88;margin-top:12px}
.contact .intro ul{list-style:none;margin-top:26px;display:grid;gap:10px;font-size:15px;opacity:.95}
.contact .intro li::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--spark);margin-right:10px;vertical-align:middle}
.cform{position:relative;background:var(--surface);color:var(--ink);border-radius:18px;padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}
.cform .full{grid-column:1/-1}
.cform label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px}
.cform label i{font-style:normal;color:var(--brand2)}
.cform input,.cform select,.cform textarea{width:100%;font:inherit;font-size:15px;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:11px 13px}
.cform textarea{min-height:140px;resize:vertical}
.cform input[type=file]{padding:8px;font-size:14px;cursor:pointer}
.cform input[type=file]::file-selector-button{font:inherit;font-weight:600;border:0;border-radius:8px;padding:7px 12px;margin-right:10px;background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand);cursor:pointer}
.cform .hint{font-size:12px;color:var(--muted);margin-top:6px}
.cform input:focus,.cform select:focus,.cform textarea:focus{outline:2px solid var(--brand);outline-offset:-1px}
.cform .agree{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink);margin:0;font-weight:500}
.cform .agree input{width:18px;height:18px;margin-top:3px;flex:none;accent-color:var(--brand);padding:0}
.cform details{font-size:13px;color:var(--muted);margin-top:8px;padding-left:28px}
.cform summary{cursor:pointer}
.cform details ul{margin:8px 0 0 18px}
.cform .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.cform button{border:0;cursor:pointer;width:100%;font:inherit;font-weight:700;font-size:16px}
.cform button:disabled{opacity:.6;cursor:default}
.cform .status{font-size:14px;min-height:1.4em;text-align:center}
.cform .status.ok{color:var(--brand);font-weight:700}
.cform .status.err{color:#E5484D;font-weight:600}
footer{border-top:1px solid var(--line);padding:36px 0 48px;font-size:13px;color:var(--muted)}
footer .row{display:flex;flex-wrap:wrap;gap:4px 18px;margin-top:10px}
@media (max-width:860px){.grid{grid-template-columns:1fr 1fr}.steps{grid-template-columns:1fr 1fr}.contact{grid-template-columns:1fr;gap:28px}}
@media (max-width:560px){
  .wrap{padding:0 16px} nav{display:none} .lang{margin-left:0} .grid,.steps{grid-template-columns:1fr}
  .hero{padding:64px 0} section{padding:60px 0} .contact{padding:28px 16px;border-radius:20px}
  .cform{grid-template-columns:1fr;padding:20px 16px}
}

/* ---------- 상세 섹션 (SW 개발 / 안전성 인증 / IT 서비스) ---------- */
section.alt{background:color-mix(in srgb,var(--brand) 5%,var(--bg))}
.grid.g4{grid-template-columns:repeat(4,1fr)}
.card.link{display:flex;flex-direction:column;transition:border-color .15s,transform .15s}
.card.link:hover{border-color:var(--brand);transform:translateY(-2px)}
.card.link p{flex:1}
.card .more{margin-top:16px;font-size:14px;font-weight:700;color:var(--brand)}
.prose{max-width:880px;font-size:16.5px;color:var(--muted)}
.prose p+p{margin-top:12px}
.prose strong{color:var(--ink)}
.prose .big{font-size:clamp(19px,2.2vw,23px);font-weight:800;color:var(--ink);letter-spacing:-.4px}
.box{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px 28px}
.box h3{font-size:19px;font-weight:800;margin-bottom:12px}
.box.scope{margin-top:32px}
.h3c{font-size:21px;font-weight:800;letter-spacing:-.4px;margin:48px 0 18px}
ul.dot{list-style:none;display:grid;gap:8px;font-size:15px}
ul.dot>li{position:relative;padding-left:16px}
ul.dot>li::before{content:"";position:absolute;left:2px;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--brand)}
ul.sub{list-style:none;margin-top:4px;display:grid;gap:3px;color:var(--muted);font-size:14.5px}
ul.sub>li{position:relative;padding-left:14px}
ul.sub>li::before{content:"–";position:absolute;left:0}
.cols4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cols4 .col{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px}
.cols4 h4{font-size:17px;font-weight:800;margin-bottom:12px;color:var(--brand)}
.std{display:flex;flex-wrap:wrap;gap:8px;margin:-16px 0 22px}
.std b,.std i{font-style:normal;font-size:13px;font-weight:700;padding:5px 11px;border-radius:999px}
.std b{background:var(--brand);color:#fff}
.std i{border:1px solid var(--line);color:var(--muted);margin-right:8px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.step2 h4{font-size:18px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.step2 h4 span{font-size:13px;font-weight:800;color:#fff;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:8px;padding:2px 8px}
.step2 .note{font-size:14px;color:var(--muted);margin-top:10px}
/* V-모델 */
.vmodel{margin:40px 0 0;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px}
.vmodel figcaption{font-weight:800;font-size:17px;margin-bottom:14px}
.vhead{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:6px}
.vhead span:nth-child(2){color:var(--brand);border:1px dashed var(--brand);border-radius:999px;padding:4px 14px}
.vhead span:last-child{text-align:right}
.vgroup{margin:16px 0 8px;text-align:center;font-size:14px;font-weight:800;color:#fff;background:#14204F;border-radius:10px;padding:8px}
.vrow{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:6px 0}
.vb{border-radius:12px;padding:9px 14px;font-size:14.5px;line-height:1.35}
.vb b{display:block;font-weight:700}
.vb small{display:block;font-size:12.5px;opacity:.75}
.vb.l{margin-left:calc(var(--i) * 4.5%);margin-right:calc((6 - var(--i)) * 1%);background:color-mix(in srgb,var(--brand) 10%,var(--surface));border:1px solid color-mix(in srgb,var(--brand) 30%,transparent)}
.vb.r{margin-right:calc(var(--i) * 4.5%);margin-left:calc((6 - var(--i)) * 1%);background:linear-gradient(90deg,var(--brand),var(--brand2));color:#fff;text-align:right}
.vb.r:has(b:empty){visibility:hidden}
.vb .safe{display:block;font-style:normal;font-size:12.5px;font-weight:700;color:var(--brand2);margin-top:4px}
.vb .safe::before{content:"🛡 "}
/* IT 서비스 */
.feats{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px}
.feat{display:grid;grid-template-columns:auto 1fr;gap:18px;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px}
.feat .ic{margin:0}
.feat h3{font-size:20px;font-weight:800;margin-bottom:8px}
.feat .prob{font-size:15px;color:var(--muted)}
.feat h4{font-size:15.5px;font-weight:800;margin:16px 0 10px;color:var(--brand)}
@media (max-width:980px){.grid.g4,.cols4{grid-template-columns:1fr 1fr}.feats{grid-template-columns:1fr}}
@media (max-width:700px){.grid2{grid-template-columns:1fr}.vb.l,.vb.r{margin-left:0;margin-right:0}.vb{font-size:13px;padding:8px 10px}.vhead span:nth-child(2){display:none}.vhead{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.grid.g4,.cols4{grid-template-columns:1fr}.feat{grid-template-columns:1fr}.vmodel,.box,.feat{padding:18px 16px}}
@media (max-width:1060px){nav a{margin-left:18px;font-size:14px}}
@media (max-width:820px){nav{display:none}}
/* 카카오톡 문의 */
.contact .intro .or{margin-top:34px;font-size:14px;font-weight:600;opacity:.8}
.kakao{display:flex;align-items:center;gap:14px;margin-top:10px;max-width:340px;background:#FEE500;color:#191919;border-radius:14px;padding:14px 16px;
  box-shadow:0 12px 28px rgba(20,16,60,.28);transition:transform .15s,box-shadow .15s}
.kakao:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(20,16,60,.34)}
.kakao:focus-visible{outline:3px solid #fff;outline-offset:3px}
.kakao .bub{flex:none;width:42px;height:42px;border-radius:11px;background:#191919;display:grid;place-items:center}
.kakao .bub svg{width:26px;height:26px}
.kakao b{display:block;font-size:16.5px;font-weight:800;letter-spacing:-.2px}
.kakao small{display:block;font-size:13px;font-weight:600;color:rgba(25,25,25,.7)}
.kakao .arr{flex:none;width:20px;height:20px;margin-left:auto}
@media (max-width:860px){.kakao{max-width:none}}
footer .row{align-items:center}
.kakao-mini{display:inline-flex;align-items:center;gap:6px;background:#FEE500;color:#191919;font-size:12.5px;font-weight:700;border-radius:999px;padding:4px 12px 4px 9px;transition:transform .15s}
.kakao-mini:hover{transform:translateY(-1px)}
.kakao-mini svg{width:15px;height:15px}
.feat.wide{grid-column:1/-1}
.feat.wide ul.dot{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}
@media (max-width:560px){.feat.wide ul.dot{grid-template-columns:1fr}}
/* 메뉴 바로 이동 시 상단 고정 메뉴에 제목이 가리지 않게 */
[id]{scroll-margin-top:84px}