:root{--navy:#1e3a8a;--indigo:#4338ca;--ink:#0f172a;--text:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#f4f6fb;--bg-soft:#f8fafc;--maxw:1200px;--gut:clamp(16px,4vw,48px);--radius:20px;--shadow:0 10px 30px rgba(15,23,42,.07)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Pretendard','NanumSquare','Nanum Square',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif;margin:0;color:var(--text);background:var(--bg);line-height:1.75;font-size:16px;word-break:keep-all;letter-spacing:-.01em}
a{color:inherit}
img{max-width:100%;height:auto}
h1,h2,h3{color:var(--ink);letter-spacing:-.02em;line-height:1.35}
/* GNB: 양쪽 끝까지 꽉 채움 */
header.site{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{width:100%;max-width:none;margin:0;padding:14px var(--gut);display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy);text-decoration:none}
.brand img{width:32px;height:32px}
.menu{display:flex;align-items:center;justify-content:center;gap:6px;flex:1;font-size:15px}
.menu a{padding:9px 14px;border-radius:10px;text-decoration:none;color:var(--ink);font-weight:600;white-space:nowrap;transition:background .2s,color .2s}
.menu a:hover{background:var(--bg);color:var(--navy)}
.menu .dropdown{position:relative}
.menu .dropdown .panel{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;min-width:230px;box-shadow:var(--shadow)}
.menu .dropdown:hover .panel,.menu .dropdown:focus-within .panel{display:block}
.menu .dropdown .panel a{display:block}
.nav a.call{background:var(--navy);color:#fff;padding:11px 20px;border-radius:999px;text-decoration:none;font-size:14px;font-weight:700;white-space:nowrap;transition:transform .2s,box-shadow .2s}
.nav a.call:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(30,58,138,.3)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;font-size:20px;cursor:pointer;color:var(--ink)}
/* 히어로: 사진 배경 + 오버레이 */
.hero{position:relative;color:#fff;text-align:left;padding:clamp(72px,10vw,128px) max(var(--gut),calc(50% - var(--maxw)/2));min-height:340px;display:flex;flex-direction:column;justify-content:center;background:linear-gradient(100deg,rgba(15,23,42,.55) 0%,rgba(15,23,42,.28) 55%,rgba(15,23,42,.05) 100%),var(--hero-bg,none) center/cover no-repeat,#5b7bd5}
.hero h1{margin:0 0 18px;font-size:clamp(28px,4.4vw,46px);color:#fff;max-width:820px;text-shadow:0 2px 16px rgba(0,0,0,.55)}
.hero p.lead{max-width:720px;margin:0;font-size:clamp(15px,1.6vw,18px);color:#f1f5f9;text-shadow:0 1px 10px rgba(0,0,0,.55)}
.hero .eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.06em;color:#c7d2fe;margin-bottom:14px}
.cta-group{margin-top:32px;display:flex;gap:12px;flex-wrap:wrap}
.cta-group a{background:#fff;color:var(--navy);padding:15px 28px;border-radius:999px;text-decoration:none;font-weight:800;font-size:15px;transition:transform .2s,box-shadow .2s}
.cta-group a:hover{transform:translateY(-3px);box-shadow:0 12px 24px rgba(0,0,0,.25)}
.cta-group a.outline{background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.7)}
/* 레이아웃: 최대 콘텐츠 폭 + 넓은 여백 + 섹션 카드 */
.wrap{max-width:calc(var(--maxw) + var(--gut)*2);margin:0 auto;padding:56px var(--gut) 72px}
.wrap article>section{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,4vw,48px);margin:0 0 32px;box-shadow:var(--shadow)}
.breadcrumb{max-width:calc(var(--maxw) + var(--gut)*2);margin:0 auto;padding:16px var(--gut);font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
h2{font-size:clamp(21px,2.4vw,28px);margin:0 0 20px;padding-left:14px;border-left:5px solid var(--indigo)}
h3{color:var(--navy);font-size:18px}
table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;font-size:14.5px;border:1px solid var(--line);border-radius:14px;overflow:hidden}
th,td{border-bottom:1px solid var(--line);padding:14px 16px;text-align:left;vertical-align:top}
tr:last-child td{border-bottom:0}
th{background:var(--bg-soft);color:var(--ink);font-weight:700}
td ul{margin:0;padding-left:16px}td li{margin:3px 0}
td a.go,.card a.go{display:inline-block;background:var(--navy);color:#fff;padding:8px 16px;border-radius:10px;text-decoration:none;font-size:13px;font-weight:700;white-space:nowrap}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin:20px 0}
.card{border:1px solid var(--line);border-radius:16px;padding:24px;background:#fff;transition:box-shadow .25s,transform .25s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card h3{margin:0 0 10px;font-size:18px}
.card p{margin:0 0 14px;font-size:14.5px}
/* FAQ 아코디언 */
details.faq-item{border:1px solid var(--line);border-radius:14px;margin:12px 0;background:#fff;overflow:hidden;transition:box-shadow .25s,border-color .25s}
details.faq-item[open]{border-color:var(--indigo);box-shadow:var(--shadow)}
details.faq-item summary{list-style:none;cursor:pointer;padding:18px 54px 18px 22px;position:relative}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:'+';position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:24px;font-weight:400;color:var(--indigo);transition:transform .25s}
details.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
details.faq-item h3{display:inline;margin:0;font-size:16px;color:var(--ink)}
details.faq-item p{margin:0;padding:0 22px 20px;font-size:15px;animation:faqin .3s ease}
@keyframes faqin{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.about ul{padding-left:0;list-style:none;font-size:15px}
.about li{padding:10px 0;border-bottom:1px dashed var(--line)}
.about li b{display:inline-block;min-width:130px;color:var(--navy)}
ol.steps{padding-left:22px}
ol.steps li{margin:10px 0}
.note{color:var(--muted);font-size:13px;margin-top:26px}
/* 카탈로그 카드 */
ul.catalog{list-style:none;padding:0;margin:24px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}
.cat-card{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fff;display:flex;flex-direction:column;transition:box-shadow .3s,transform .3s}
.cat-card:hover{box-shadow:0 16px 36px rgba(15,23,42,.13);transform:translateY(-5px)}
.cat-img{display:block;aspect-ratio:4/3;overflow:hidden;background:var(--bg-soft)}
.cat-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.cat-card:hover .cat-img img{transform:scale(1.05)}
.cat-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.cat-body h3{margin:0;font-size:18px}
.cat-body h3 a{text-decoration:none;color:var(--navy)}
.cat-short{margin:0;font-size:14px;color:var(--text)}
.cat-subs{list-style:none;padding:0;margin:4px 0;display:flex;flex-direction:column;gap:6px;font-size:14px}
.cat-subs li a{color:var(--navy);font-weight:600;text-decoration:none}
.cat-subs li a:hover{text-decoration:underline}
.cat-subs li a.ext{color:var(--muted);font-weight:400;margin-left:4px}
.cat-cta{margin-top:auto;display:block;text-align:center;background:var(--navy);color:#fff;padding:12px;border-radius:12px;text-decoration:none;font-weight:700;font-size:14px;transition:background .2s}
.cat-cta:hover{background:var(--indigo)}
/* 하단 연관 링크: 사진 배너 */
.related{max-width:calc(var(--maxw) + var(--gut)*2);margin:0 auto;padding:0 var(--gut) 72px}
.related h2{margin-top:0}
.rel-banners{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:0 0 48px}
.rel-banner{position:relative;display:flex;flex-direction:column;justify-content:flex-end;min-height:220px;padding:24px;border-radius:var(--radius);overflow:hidden;color:#fff;text-decoration:none;background:linear-gradient(180deg,rgba(15,23,42,.1),rgba(15,23,42,.82)),var(--bn) center/cover;transition:transform .3s,box-shadow .3s}
.rel-banner:hover{transform:translateY(-5px);box-shadow:0 18px 38px rgba(15,23,42,.25)}
.rel-banner b{font-size:19px;margin-bottom:4px}
.rel-banner span{font-size:13.5px;color:#e2e8f0}
/* 상담페이지 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:22px;margin:24px 0}
.contact-card{border:1px solid var(--line);border-radius:18px;padding:26px;background:#fff;scroll-margin-top:90px}
.contact-card:target{border-color:var(--indigo);box-shadow:0 0 0 4px rgba(67,56,202,.15)}
.contact-card h3{margin:0 0 6px}
.contact-card p{margin:0 0 14px;font-size:14.5px}
.contact-card .num{font-size:22px;font-weight:800;color:var(--ink);letter-spacing:.01em;margin:6px 0 16px;display:block}
.contact-card .btns{display:flex;gap:10px}
.contact-card .btns a{flex:1;text-align:center;padding:13px 10px;border-radius:12px;text-decoration:none;font-weight:700;font-size:15px;background:var(--navy);color:#fff;transition:background .2s,transform .2s}
.contact-card .btns a.sms{background:#fff;color:var(--navy);border:1.5px solid var(--navy)}
.contact-card .btns a:hover{transform:translateY(-2px)}
/* 모바일 하단 고정 CTA / 메인 이동 플로팅 */
.m-cta{display:none}
.float-home{position:fixed;left:24px;bottom:24px;z-index:70;background:#fff;color:var(--navy);border:1px solid var(--line);box-shadow:0 10px 26px rgba(15,23,42,.2);padding:12px 20px;border-radius:999px;text-decoration:none;font-weight:700;font-size:14px;transition:transform .2s}
.float-home:hover{transform:translateY(-3px)}
footer.site{background:#0f172a;color:#94a3b8;padding:48px var(--gut);text-align:center;font-size:13.5px;line-height:2}
footer.site b{color:#e2e8f0}
footer.site a{color:#cbd5e1;text-decoration:none}
/* 스크롤 리빌 */
html.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
html.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}html.js .reveal{opacity:1;transform:none;transition:none}*{animation:none!important}}
/* 모바일 (768px 이하) */
@media (max-width:768px){
  body{font-size:15.5px;padding-bottom:68px}
  .nav{flex-wrap:wrap;gap:10px;padding:12px var(--gut)}
  .nav-toggle{display:block;order:2;margin-left:auto}
  .nav a.call{order:3;padding:10px 16px;font-size:13px}
  .menu{display:none;order:4;flex:0 0 100%;flex-direction:column;align-items:stretch;gap:2px;padding:8px 0 4px;border-top:1px solid var(--line)}
  .menu.open{display:flex}
  .menu a{padding:13px 12px;font-size:15.5px}
  .menu .dropdown .panel{display:block;position:static;border:0;box-shadow:none;padding:0 0 0 14px;min-width:0}
  .menu .dropdown .panel a{font-weight:500;color:var(--text);padding:10px 12px}
  .hero{min-height:300px;padding:64px var(--gut) 56px;background:linear-gradient(180deg,rgba(15,23,42,.35),rgba(15,23,42,.55)),var(--hero-bg,none) center/cover no-repeat,#5b7bd5}
  .cta-group a{flex:1 1 100%;text-align:center}
  .wrap{padding:36px var(--gut) 56px}
  .wrap article>section{padding:24px 20px;margin-bottom:22px}
  table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:normal}
  th,td{min-width:120px;padding:12px}
  .rel-banners{grid-template-columns:1fr}
  .rel-banner{min-height:170px}
  ul.catalog{grid-template-columns:1fr}
  .about li b{display:block}
  .contact-card .num{font-size:20px}
  .m-cta{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:80;background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(15,23,42,.12);padding:8px 10px calc(8px + env(safe-area-inset-bottom));gap:8px}
  .m-cta a{text-align:center;padding:14px 8px;border-radius:12px;font-weight:800;font-size:15px;text-decoration:none;background:var(--navy);color:#fff}
  .m-cta a.sms{background:#fff;color:var(--navy);border:1.5px solid var(--navy)}
  .float-home{left:12px;bottom:84px;padding:10px 16px;font-size:13px}
}

/* 시공 서비스 통합 메뉴(카테고리 4개를 한 드롭다운에 묶음) */
.menu .mega .panel{min-width:min(900px,92vw);grid-template-columns:repeat(4,1fr);gap:4px 10px;padding:14px}
.menu .mega:hover .panel,.menu .mega:focus-within .panel{display:grid}
.menu .mega .grp-title{font-weight:800;color:var(--navy);border-bottom:1px solid var(--line);border-radius:0;margin-bottom:4px}
.menu .mega .panel a{font-size:14px}
@media (max-width:768px){
  .menu .mega .panel,.menu .mega:hover .panel{display:block;min-width:0;padding:0 0 0 14px}
}
.menu .mega .grp-sub{display:block;margin:10px 0 2px;padding:6px 14px 0;border-top:1px dashed var(--line);font-size:12px;font-weight:700;color:#64748b}
.menu .mega .panel a.ext{font-size:13px;font-weight:500;color:#475569;white-space:normal}
.cat-sub-label{margin:8px 0 0;padding-top:10px;border-top:1px dashed var(--line);font-size:12px;font-weight:700;color:var(--muted)}
.cat-sites li a{font-weight:500;font-size:13.5px}
.cat-time{color:var(--muted);font-weight:400;font-size:13px}
.cat-tel{margin:4px 0 0;font-size:14px;color:var(--text)}
.cat-tel b{color:var(--navy)}

/* 전문 사이트 사진 카드 배너 */
.sub-banners{list-style:none;padding:0;margin:12px 0 28px;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.sub-banner{position:relative;display:flex;flex-direction:column;justify-content:flex-end;aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;color:#fff;text-decoration:none;background:#1e3a8a;transition:transform .3s,box-shadow .3s}
.sub-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.sub-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.05) 30%,rgba(15,23,42,.88))}
.sub-banner b,.sub-banner span{position:relative;z-index:1;padding:0 14px}
.sub-banner b{font-size:15.5px;line-height:1.35}
.sub-banner span{font-size:12px;color:#e2e8f0;padding-bottom:14px;margin-top:2px}
.sub-banner:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(15,23,42,.25)}
@media (max-width:1100px){.sub-banners{grid-template-columns:repeat(3,1fr)}}
@media (max-width:768px){.sub-banners{grid-template-columns:repeat(2,1fr)}}

/* 지역 카드: 가운데 정렬 */
.region-card{text-align:center}