:root{--blue:#0b5199;--blue-d:#083c72;--ink:#1c2430;--mut:#5a6573;--line:#dfe4ea;--bg:#fff;--alt:#f4f7fa;--r:10px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--blue)}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.25;margin:0 0 .6em}
h1{font-size:clamp(28px,4.4vw,44px);letter-spacing:-.01em}
h2{font-size:clamp(22px,2.6vw,28px)}
h3{font-size:18px}
section{padding:56px 0}
.alt{background:var(--alt)}
.eyebrow{color:var(--blue);font-weight:600;font-size:14px;letter-spacing:.04em;text-transform:uppercase;margin:0 0 10px}
.eyebrow a{text-decoration:none}
.lead{font-size:clamp(17px,1.8vw,19px);color:var(--mut);max-width:760px}
.note{color:var(--mut);font-size:14px}

/* 머리 */
.top{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;min-height:68px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--mut)}
.brand img{height:36px;width:auto}
.brand small{font-size:11px;line-height:1.2;border-left:1px solid var(--line);padding-left:10px}
.top nav{display:flex;gap:18px;margin-left:auto;flex-wrap:wrap}
.top nav a{color:var(--ink);text-decoration:none;font-size:15px;padding:4px 0;border-bottom:2px solid transparent}
.top nav a:hover,.top nav a[aria-current]{border-color:var(--blue);color:var(--blue)}

/* 단추 */
.btn{display:inline-block;background:var(--blue);color:#fff;text-decoration:none;font-weight:600;padding:13px 22px;border-radius:8px;border:2px solid var(--blue);cursor:pointer;font-size:16px}
.btn:hover{background:var(--blue-d);border-color:var(--blue-d)}
.btn.ghost{background:transparent;color:var(--blue)}
.btn.sm{padding:8px 14px;font-size:14px}
.row{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}

/* 첫 화면 */
.hero{background:linear-gradient(180deg,#f2f6fb,#fff);padding:72px 0 48px}
.facts{list-style:none;padding:0;margin:32px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.facts li{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;color:var(--mut);font-size:14px}
.facts b{display:block;color:var(--blue);font-size:22px}
.head{background:var(--alt);padding:48px 0 36px}
.photo{padding:24px 0 0}
.photo figure{margin:0}
.photo figure{background:var(--alt);border-radius:var(--r);padding:28px 32px 18px}
.photo img{width:100%;max-width:900px;margin:0 auto;filter:drop-shadow(0 6px 14px rgba(20,40,70,.18))}
.photo figcaption{text-align:center}
figcaption{color:var(--mut);font-size:14px;margin-top:8px}

/* 카드 */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{display:block;border:1px solid var(--line);border-radius:var(--r);padding:22px;text-decoration:none;color:var(--ink);background:#fff}
a.card:hover{border-color:var(--blue);box-shadow:0 4px 18px rgba(11,81,153,.10)}
.card p{color:var(--mut);margin:0 0 10px}
.card span{color:var(--blue);font-weight:600;font-size:14px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.two.wide{grid-template-columns:2.2fr 1fr}
.ticks{padding-left:20px}
.ticks li{margin:0 0 10px}
.steps{padding-left:22px}
.steps li{margin:0 0 10px}
.time{list-style:none;padding:0}
.time li{padding:10px 0;border-bottom:1px solid var(--line)}
.time b{display:inline-block;width:64px;color:var(--blue)}
.side{border:1px solid var(--line);border-radius:var(--r);padding:20px;align-self:start;position:sticky;top:90px}
.side ul{padding-left:18px;margin:0 0 16px}

/* 표 */
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);margin-bottom:24px}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--alt);font-weight:600}
td:first-child{font-weight:600;width:34%}
tr:last-child td{border-bottom:0}
details{border-bottom:1px solid var(--line);padding:12px 0}
summary{cursor:pointer;font-weight:600}

/* 견적 창 */
.form{max-width:860px;display:grid;gap:16px}
.g2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{display:grid;gap:6px;font-weight:600;font-size:14px}
.form input,.form select,.form textarea{font:inherit;font-weight:400;padding:11px 12px;border:1px solid #c5cdd6;border-radius:8px;width:100%;background:#fff}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--blue);outline-offset:1px;border-color:var(--blue)}
.hp{position:absolute;left:-9999px;width:1px;height:1px}
.msg{font-weight:600;margin:0}
.msg.ok{color:#17733a}.msg.err{color:#b3261e}

.cta{background:var(--blue);color:#fff;text-align:center}
.cta p{opacity:.9;max-width:640px;margin:0 auto 22px}
.cta .btn{background:#fff;color:var(--blue);border-color:#fff}
footer{background:#111a24;color:#c9d2dc;font-size:14px;padding:36px 0 20px}
footer a{color:#fff}
.fgrid{display:grid;grid-template-columns:2fr 1.4fr 1fr;gap:24px}
.copy{margin-top:20px;color:#8693a1}

@media (max-width:900px){
 .cards{grid-template-columns:1fr 1fr}
 .two,.two.wide{grid-template-columns:1fr;gap:24px}
 .side{position:static}
 .facts{grid-template-columns:1fr 1fr}
 .fgrid{grid-template-columns:1fr}
}
@media (max-width:640px){
 .wrap{padding:0 16px}
 .top nav{order:3;width:100%;gap:14px;overflow-x:auto;flex-wrap:nowrap;padding-bottom:8px}
 .top .btn.sm{margin-left:auto}
 .brand small{display:none}
 .top .wrap{gap:10px;padding-top:8px}
 .cards,.g2{grid-template-columns:1fr}
 section{padding:40px 0}
 .hero{padding:44px 0 32px}
 td:first-child{width:40%}
}

/* 제품 라인업 */
.lineup{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:8px}
.pcard{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;color:var(--ink);background:#fff}
.pcard:hover{border-color:var(--blue);box-shadow:0 4px 18px rgba(11,81,153,.10)}
.pfig{background:var(--alt);border-bottom:1px solid var(--line);padding:14px 10px;display:flex;align-items:center;justify-content:center;min-height:120px}
.xs{width:100%;max-width:260px;height:auto}
.pbody{padding:18px;display:flex;flex-direction:column;flex:1}
.pbody p{color:var(--mut);margin:0 0 12px;font-size:15px}
.pbody span{color:var(--blue);font-weight:600;font-size:14px;margin-top:auto}
.tags{list-style:none;padding:0;margin:0 0 14px;display:flex;flex-wrap:wrap;gap:6px}
.tags li{font-size:12px;background:#eaf1f9;color:var(--blue-d);border-radius:20px;padding:3px 9px}
.optt{margin:32px 0 12px}
.opts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.opt{display:block;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:8px;padding:14px 16px;text-decoration:none;color:var(--ink)}
.opt b{display:block}.opt span{color:var(--mut);font-size:14px}
.opt:hover{background:var(--alt)}
@media (max-width:1000px){.lineup{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.lineup,.opts{grid-template-columns:1fr}}

/* v2: 고객사 로고 · 핵심 숫자 · 쓰는 곳 · 글 쪽 */
.clients{padding:28px 0;border-bottom:1px solid var(--line)}
.ctitle{text-align:center;color:var(--mut);font-size:14px;letter-spacing:.04em;text-transform:uppercase;margin:0 0 18px}
.logos{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:22px 44px}
.logos img{height:34px;width:auto;max-width:150px;object-fit:contain}
.key{color:var(--blue)!important;font-weight:600;font-size:14px!important;margin:-4px 0 8px!important}
.facts.six{grid-template-columns:repeat(6,1fr);margin-top:8px}
.opts.four{grid-template-columns:repeat(4,1fr)}
.prose h2{margin-top:28px}.prose h2:first-child{margin-top:0}
.side h3{margin-top:4px}.side h3+ul{margin-bottom:18px}
@media (max-width:1000px){.facts.six{grid-template-columns:repeat(3,1fr)}.opts.four{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.facts.six{grid-template-columns:1fr 1fr}.opts.four{grid-template-columns:1fr}.logos{gap:18px 28px}.logos img{height:26px;max-width:120px}}