@charset "utf-8";
/* ═══════════════════════════════════════════════════════════
   고수의 시공 — 공통 디자인 시스템 (2026-08-19 시안 반영)
   6개 페이지(메인·회사소개·시공서비스·시공실적·칼럼·문의)가 공유한다.
   색·간격·부품을 여기서만 바꾸면 전 페이지가 함께 바뀐다.
   ═══════════════════════════════════════════════════════════ */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#3B55A0;        /* 히어로·주버튼 */
  --navy-d:#2E4384;      /* hover */
  --navy-l:#5B72B8;
  --blue:#3B62C4;        /* 제목 둘째 줄 강조 */
  --paper:#fff;
  --soft:#F5F8FF;        /* 연한 배경 */
  --soft2:#E4EBFA;       /* CTA 밴드 */
  --gray:#EDEFF2;        /* 미션·비전 섹션 */
  --ink:#1A1D21;
  --ink2:#3E434A;
  --mut:#6E747E;
  --line:#E3E6EB;
  --foot:#3F4145;
  --f:'Pretendard Variable',Pretendard,-apple-system,BlinkMacSystemFont,system-ui,'Malgun Gothic',sans-serif;
  --pad:clamp(64px,7vw,110px);
}
html{scroll-behavior:smooth}
body{font-family:var(--f);color:var(--ink);background:var(--paper);
  font-size:16px;line-height:1.7;word-break:keep-all;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1200px,92vw);margin:0 auto}
.sec{padding:var(--pad) 0}
.bg-soft{background:var(--soft)}
.bg-soft2{background:var(--soft2)}
.bg-gray{background:var(--gray)}

/* ── 타이포 ── */
h1,h2,h3,h4{letter-spacing:-.035em;font-weight:800;line-height:1.28}
.h-sec{font-size:clamp(1.6rem,3vw,2.15rem)}
.h-sec .b{color:var(--blue);display:block}
.lbl{display:flex;align-items:center;gap:10px;font-size:11.5px;letter-spacing:.2em;
  font-weight:700;color:var(--navy);text-transform:uppercase;margin-bottom:16px}
.lbl::before{content:'';width:30px;height:1px;background:var(--navy)}
.lbl.ctr{justify-content:center}
.desc{color:var(--mut);font-size:15px;margin-top:14px;max-width:62ch}
.ctr{text-align:center}
.ctr .lbl{justify-content:center}
.ctr .desc{margin-left:auto;margin-right:auto}

/* ── 헤더 ── */
.gnb{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.gnb .wrap{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:17.5px;letter-spacing:-.03em}
.brand img{height:30px;width:auto}
.brand small{display:block;font-size:8.5px;letter-spacing:.14em;color:var(--mut);font-weight:600}
.gnb nav{display:flex;gap:26px;margin-left:14px}
.gnb nav a{font-size:15px;font-weight:600;color:var(--ink2);padding:6px 0;position:relative}
.gnb nav a:hover,.gnb nav a.on{color:var(--navy)}
.gnb nav a.on::after{content:'';position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--navy)}
.gnb .right{margin-left:auto;display:flex;align-items:center;gap:16px}
.gnb .tel{display:flex;align-items:center;gap:7px;font-weight:800;font-size:16px;color:var(--navy)}
.gnb .tel i{width:20px;height:20px;border-radius:50%;background:var(--navy);color:#fff;
  display:grid;place-items:center;font-size:10px;font-style:normal}
.burger{display:none;background:none;border:0;font-size:22px;cursor:pointer;color:var(--ink)}
@media(max-width:1024px){
  .gnb nav{display:none} .gnb .tel span{display:none} .burger{display:block}
  .gnb .wrap{gap:12px}
}
.mnav{display:none;border-top:1px solid var(--line);background:#fff}
.mnav.on{display:block}
.mnav a{display:block;padding:15px 0;border-bottom:1px solid var(--line);font-weight:600}

/* ── 버튼 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:4px;font-weight:700;font-size:15px;font-family:var(--f);
  border:1px solid transparent;cursor:pointer;transition:.16s;white-space:nowrap}
.btn-n{background:var(--navy);color:#fff}
.btn-n:hover{background:var(--navy-d)}
.btn-o{background:#fff;color:var(--navy);border-color:var(--navy)}
.btn-o:hover{background:var(--soft)}
.btn-w{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-d{background:#4A4E55;color:#fff}
.btn-lg{padding:16px 32px;font-size:16px}
.btn-sm{padding:10px 18px;font-size:14px}
.btns{display:flex;gap:10px;flex-wrap:wrap}

/* ── 서브 히어로 (남색 배너) ── */
.subhero{background:var(--navy);color:#fff;padding:clamp(46px,6vw,74px) 0}
.subhero .crumb{font-size:12.5px;color:rgba(255,255,255,.72);margin-bottom:14px}
.subhero h1{font-size:clamp(1.9rem,4.4vw,2.9rem);letter-spacing:-.04em}
.subhero p{margin-top:14px;color:rgba(255,255,255,.85);font-size:15px;line-height:1.66}

/* ── 카드 ── */
.card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}

/* 체크 리스트 */
.chk{list-style:none;display:grid;gap:9px;margin-top:16px}
.chk li{font-size:14px;color:var(--ink2);display:flex;gap:9px;align-items:flex-start}
.chk li::before{content:'✓';color:var(--navy);font-weight:800;flex:none;font-size:13px}

/* 통계 */
.stats{display:flex;flex-wrap:wrap;gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}
.stats div{flex:1;min-width:110px;padding:18px 14px;text-align:center;border-right:1px solid var(--line)}
.stats div:last-child{border-right:0}
.stats b{display:block;font-size:clamp(1.15rem,2.2vw,1.5rem);font-weight:800;color:var(--navy);letter-spacing:-.03em}
.stats span{font-size:11.5px;color:var(--mut);font-weight:600}

/* ── CTA 밴드 ── */
.ctaband{background:var(--soft2);padding:clamp(48px,6vw,80px) 0}
.ctaband .wrap{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.ctaband h2{font-size:clamp(1.45rem,2.8vw,2rem)}
.ctaband h2 .b{color:var(--blue);display:block}
.ctaband p{color:var(--mut);font-size:14.5px;margin-top:12px}
.ctaband-navy{background:var(--navy);color:#fff}
.ctaband-navy h2 .b{color:#fff}
.ctaband-navy p{color:rgba(255,255,255,.8)}

/* ── FAQ ── */
.faq{display:grid;gap:12px;margin-top:32px}
.faq details{border:1px solid var(--line);border-radius:8px;background:#fff}
.faq summary{padding:20px 24px;cursor:pointer;font-weight:700;font-size:15.5px;list-style:none;
  display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'＋';color:var(--mut);font-weight:400;font-size:17px;flex:none}
.faq details[open] summary::after{content:'－'}
.faq .a{padding:0 24px 22px;color:var(--mut);font-size:14.5px}

/* ── 폼 ── */
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;font-weight:700;color:var(--ink2);margin-bottom:8px}
.field label .req{color:#D9534F}
.field input,.field select,.field textarea{width:100%;padding:13px 14px;border:1px solid var(--line);
  border-radius:5px;font-family:var(--f);font-size:15px;background:#fff;color:var(--ink)}
.field input::placeholder,.field textarea::placeholder{color:#AEB3BB}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--navy);outline-offset:-2px}
.field textarea{min-height:120px;resize:vertical}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chips label{display:inline-flex;align-items:center;padding:10px 18px;border:1px solid var(--line);
  border-radius:99px;font-size:14px;font-weight:600;color:var(--mut);cursor:pointer;transition:.15s;margin:0}
.chips input{position:absolute;opacity:0;width:0;height:0}
.chips input:checked+span,.chips label.on{color:#fff}
.chips label:has(input:checked){background:var(--navy);border-color:var(--navy);color:#fff}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:620px){.f2{grid-template-columns:1fr}}

/* ── 푸터 ── */
.foot{background:var(--foot);color:#B9BCC2;padding:56px 0 0;font-size:14px}
.foot .top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:44px}
.foot .brand{color:#fff;margin-bottom:16px}
.foot .brand small{color:#9BA0A8}
.foot p{font-size:13.5px;line-height:1.7;color:#9BA0A8}
.foot .ln{display:flex;gap:10px;align-items:flex-start;margin-top:14px;font-size:13.5px}
.foot .ln i{font-style:normal;flex:none;opacity:.7}
.foot .ln b{color:#DDE0E5;font-weight:600;display:block}
.foot .ln span{color:#8A8F97;font-size:12.5px}
.foot h4{color:#fff;font-size:14.5px;margin-bottom:16px;font-weight:700}
.foot ul{list-style:none;display:grid;gap:11px}
.foot ul a{font-size:13.5px;color:#9BA0A8}
.foot ul a:hover{color:#fff}
.foot .bot{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;display:flex;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#8A8F97}
@media(max-width:820px){.foot .top{grid-template-columns:1fr 1fr;gap:28px}
  .foot .top>div:first-child{grid-column:1/-1}}

/* ── 모바일 하단 고정 ── */
.mbar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:none;gap:8px;padding:9px;
  background:rgba(26,29,33,.96);backdrop-filter:blur(6px)}
.mbar a{flex:1;text-align:center;padding:13px;border-radius:5px;font-weight:700;font-size:15px}
.mbar .a1{background:var(--navy);color:#fff}
.mbar .a2{background:rgba(255,255,255,.12);color:#fff}
@media(max-width:820px){.mbar{display:flex}body{padding-bottom:64px}}

/* ── 스크롤 등장 ── */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.rv.on{opacity:1;transform:none}