/* 난방배관교체 — 웜화이트 #F6F3EE / 차콜 #252724 / 코퍼 #A87551 · Pretendard */
:root{
  --bg:#F6F3EE; --ink:#252724; --cu:#A87551; --cu-d:#8a5c3b;
  --mut:#5d5f5a; --line:rgba(37,39,36,.18); --line-s:rgba(37,39,36,.1); --card:#efebe4;
  --pad:20px; --max:1240px; --hh:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:auto}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Pretendard Variable',Pretendard,-apple-system,'Segoe UI','Malgun Gothic',sans-serif;font-size:16px;line-height:1.78;letter-spacing:-.01em;word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased;padding-bottom:calc(76px + env(safe-area-inset-bottom))}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cu);outline-offset:3px}
h1,h2,h3,p,ul,ol,dl,dd,figure,table{margin:0;padding:0}
ul,ol{list-style:none}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:0}

/* 헤더 */
.hd{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line-s)}
.hd .wrap{height:var(--hh);display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:800;font-size:1.2rem;letter-spacing:-.03em}
.nav{display:none}
.nav a{display:inline-block;padding:8px 14px;font-size:.95rem;font-weight:500}
.nav a[aria-current]{border-bottom:2px solid var(--cu)}
.nav a:hover{color:var(--cu-d)}
.mbtn{width:48px;height:48px;margin-right:-10px;background:none;border:0;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}
.mbtn i{display:block;width:22px;height:2px;background:var(--ink);position:relative}
.mbtn i::before,.mbtn i::after{content:"";position:absolute;left:0;width:22px;height:2px;background:var(--ink)}
.mbtn i::before{top:-7px}.mbtn i::after{top:7px}
.mnav{display:none;border-top:1px solid var(--line-s);background:var(--bg)}
.mnav.on{display:block}
.mnav a{display:flex;align-items:center;min-height:54px;padding:0 var(--pad);border-bottom:1px solid var(--line-s);font-weight:600;font-size:1.05rem}

/* 공통 */
h1,.h1{font-size:clamp(2.1rem,5.4vw,3.6rem);line-height:1.18;font-weight:800;letter-spacing:-.04em;word-break:keep-all}
h2{font-size:clamp(1.55rem,3.2vw,2.15rem);line-height:1.3;font-weight:800;letter-spacing:-.035em}
h3{font-size:1.1rem;line-height:1.4;font-weight:700;letter-spacing:-.02em}
.num{font-weight:800;color:var(--cu);letter-spacing:.02em}
.sec{padding:56px 0;border-top:1px solid var(--line)}
.sec-h{display:flex;flex-direction:column;gap:10px;margin-bottom:28px;max-width:44rem}
.sec-h .num{font-size:1.5rem;line-height:1}
.sec-h p{color:var(--mut)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 28px;background:var(--cu);color:#fff;font-weight:700;font-size:1.125rem;border:0;cursor:pointer;letter-spacing:-.01em}
.btn:hover{background:var(--cu-d)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn.ghost:hover{background:var(--ink);color:#fff}
.lnk{display:inline-flex;align-items:center;min-height:44px;font-weight:600;border-bottom:1px solid var(--ink)}
.lnk::after{content:"→";margin-left:8px;color:var(--cu)}
.lnk:hover{color:var(--cu-d)}
.ph{background:var(--card);overflow:hidden}
.ph img{width:100%;height:100%;object-fit:cover}
.cap{font-size:.92rem;color:var(--mut);line-height:1.65;margin-top:10px}
.cap b{color:var(--ink);font-weight:700}
.tag{position:absolute;left:8px;top:8px;background:var(--ink);color:#fff;font-size:.8rem;font-weight:600;padding:2px 10px;line-height:1.7}

/* ① 히어로 */
.hero{display:flex;flex-direction:column}
.hero .ph{aspect-ratio:4/3;order:-1;max-height:340px}
.hero .ph img{object-position:50% 45%}
.hero-t{background:var(--bg);color:var(--ink);padding:32px var(--pad) 44px}
.hero-t .eyebrow{display:block;width:36px;height:2px;background:var(--cu);margin-bottom:20px}
.hero-t .sub{margin-top:14px;font-size:1.15rem;font-weight:500;color:#585A55;line-height:1.55}
.hero-t .sm{margin-top:10px;font-size:.98rem;color:#585A55}
.hero-t .btn{margin-top:24px}
.hero-t h1{color:#252724}

/* 서브페이지 머리 (H1 위치·스타일 공통) */
.pg{background:var(--ink);color:#f4f0e9;padding:40px 0 44px}
.pg .eyebrow{display:block;width:36px;height:2px;background:var(--cu);margin-bottom:20px}
.pg h1{color:#fff;max-width:20ch}
.pg .lead{margin-top:16px;max-width:42rem;font-size:1.06rem;color:#e0dacf;line-height:1.7}
.crumb{font-size:.88rem;color:#bdb7ac;margin-bottom:18px}
.crumb a{border-bottom:1px solid rgba(255,255,255,.3)}
.crumb span{margin:0 6px}

/* ② 전후 */
.ba-grid{display:grid;gap:36px}
.ba-pair{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.ba-img{position:relative;aspect-ratio:1/1}
.ba-img.ph{height:auto}

/* ③ 서비스 */
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px 14px}
.svc{display:block}
.svc .ph{aspect-ratio:4/3}
.svc h3{margin-top:12px}
.svc p{margin-top:4px;font-size:.92rem;color:var(--mut);line-height:1.6}
.svc .go{display:inline-block;margin-top:6px;font-size:.92rem;font-weight:600;border-bottom:1px solid var(--ink);padding-bottom:1px}
.svc:hover h3{color:var(--cu-d)}

/* ④ 과정 */
.steps{counter-reset:s;border-top:1px solid var(--line)}
.step{display:grid;gap:12px;padding:24px 0;border-bottom:1px solid var(--line)}
.step .num{font-size:1.9rem;line-height:1}
.step h3{font-size:1.2rem;margin-top:6px}
.step p{margin-top:8px;color:#3b3d39}
.step .ph{aspect-ratio:16/10;max-height:210px}
.step .ph img{object-position:50% 40%}

/* ⑤ 사례 */
.cases{display:grid;gap:36px}
.case .ba-pair{grid-template-columns:1fr 1fr}
.case .ba-img{aspect-ratio:4/3}
.case h3{margin-top:14px}

/* ⑥ 표 */
.cmp{width:100%;border-collapse:collapse;margin-top:8px}
.cmp th,.cmp td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:.98rem}
.cmp thead th{font-size:.9rem;color:var(--mut);font-weight:600;border-bottom:1px solid var(--ink)}
.cmp tbody th{font-weight:700;width:22%}
.vars{display:grid;gap:0;margin-top:8px;border-top:1px solid var(--line)}
.vars div{padding:14px 0;border-bottom:1px solid var(--line)}
.vars dt{font-weight:700}
.vars dd{color:var(--mut);font-size:.95rem;line-height:1.65;margin-top:2px}
.note{margin-top:22px;padding:16px 18px;background:var(--card);border-left:3px solid var(--cu);font-size:.96rem}
.two{display:grid;gap:32px}
.chk li{position:relative;padding:10px 0 10px 24px;border-bottom:1px solid var(--line-s)}
.chk li::before{content:"";position:absolute;left:2px;top:19px;width:8px;height:8px;background:var(--cu)}

/* ⑦ 회사·지역 */
.facts{border-top:1px solid var(--ink);margin-top:20px}
.facts div{display:grid;grid-template-columns:7.2em 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.facts dt{color:var(--mut);font-size:.93rem}
.facts dd{font-size:.98rem}
.rg{border-top:1px solid var(--line)}
.rg:last-of-type{border-bottom:1px solid var(--line)}
.rg summary{display:flex;align-items:center;justify-content:space-between;min-height:56px;cursor:pointer;list-style:none;font-weight:700;font-size:1.05rem}
.rg summary::-webkit-details-marker{display:none}
.rg summary small{font-weight:500;color:var(--mut);font-size:.88rem;margin-left:8px}
.rg summary::after{content:"+";font-size:1.5rem;font-weight:400;color:var(--cu);margin-left:auto;padding-left:12px}
.rg[open] summary::after{content:"–"}
.rg ul{display:flex;flex-wrap:wrap;gap:0 4px;padding:0 0 16px}
.rg li a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px 0 0;margin-right:4px;font-size:.98rem;border-bottom:1px solid transparent}
.rg li a:hover{color:var(--cu-d);border-bottom-color:var(--cu)}

/* ⑧ FAQ */
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{display:flex;gap:14px;align-items:flex-start;min-height:60px;padding:16px 0;cursor:pointer;list-style:none;font-weight:700;font-size:1.05rem;line-height:1.5}
.faq summary::-webkit-details-marker{display:none}
.faq summary .num{font-size:.95rem;padding-top:2px;min-width:1.8em}
.faq summary::after{content:"+";margin-left:auto;padding-left:10px;font-size:1.5rem;font-weight:400;color:var(--cu);line-height:1.2}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 22px 2.5em;color:#3b3d39}
.faq .a p+p{margin-top:8px}
.cta-box{background:var(--ink);color:#f4f0e9;padding:28px 24px;margin-top:36px}
.cta-box h3{font-size:1.3rem;color:#fff}
.cta-box p{margin-top:8px;color:#d6d0c5}
.cta-box ul{margin:16px 0 22px;border-top:1px solid rgba(255,255,255,.18)}
.cta-box li{padding:9px 0 9px 20px;border-bottom:1px solid rgba(255,255,255,.18);position:relative;font-size:.97rem}
.cta-box li::before{content:"";position:absolute;left:0;top:19px;width:7px;height:7px;background:var(--cu)}

/* 서브페이지 본문 */
.art{padding:44px 0 8px}
.art section{margin-top:44px}
.art section:first-child{margin-top:0}
.art h2{margin-bottom:14px}
.art p+p{margin-top:12px}
.art .ba-pair{margin:6px 0 0}
.art .ba-img{aspect-ratio:4/3}
.art ul.bul{margin-top:8px}
.art ul.bul li{position:relative;padding:8px 0 8px 22px;border-bottom:1px solid var(--line-s)}
.art ul.bul li::before{content:"";position:absolute;left:2px;top:18px;width:7px;height:7px;background:var(--cu)}
.side{display:grid;gap:12px;margin-top:16px}
.rel{display:flex;flex-wrap:wrap;gap:0 4px;margin-top:6px}
.rel a{display:inline-flex;align-items:center;min-height:44px;padding-right:14px;border-bottom:1px solid transparent}
.rel a:hover{color:var(--cu-d);border-bottom-color:var(--cu)}
.tbl{width:100%;border-collapse:collapse;margin-top:6px}
.tbl th,.tbl td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:.97rem}
.tbl thead th{border-bottom:1px solid var(--ink);color:var(--mut);font-size:.9rem;font-weight:600}
.tbl tbody th{font-weight:700;width:26%}
.list-cases{display:grid;gap:32px}
.pol h2{font-size:1.25rem;margin:30px 0 8px}
.pol p,.pol li{font-size:.98rem}
.pol ul{margin-top:8px}.pol li{padding:4px 0 4px 18px;position:relative}
.pol li::before{content:"";position:absolute;left:2px;top:14px;width:6px;height:6px;background:var(--cu)}
.cgrid{display:grid;gap:14px;margin-top:20px}
.cbox{border:1px solid var(--line);padding:22px 20px;background:var(--card)}
.cbox h2{font-size:1.2rem}
.cbox p{margin-top:6px;color:var(--mut);font-size:.95rem}
.cbox .big{display:block;margin:8px 0 14px;font-size:1.7rem;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.cbox .btn{width:100%}

/* 푸터 */
.ft{background:var(--ink);color:#d6d0c5;padding:36px 0 32px;font-size:.9rem;line-height:1.75}
.ft b{color:#fff;font-size:1.05rem;display:block;margin-bottom:6px}
.ft a{border-bottom:1px solid rgba(255,255,255,.35)}
.ft .lk{margin-top:12px}
.ft small{display:block;margin-top:14px;color:#a49f94;font-size:.82rem}

/* 하단 고정 상담 */
.fix{position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px var(--pad) calc(10px + env(safe-area-inset-bottom));background:rgba(246,243,238,.96);border-top:1px solid var(--line)}
.fix .btn{width:100%;min-height:54px}

@media (min-width:768px){
  :root{--pad:32px;--hh:72px}
  body{font-size:17px;padding-bottom:0}
  .fix{display:none}
  .nav{display:flex}.mbtn,.mnav{display:none!important}
  .sec{padding:96px 0}
  .sec-h{margin-bottom:40px}
  .hero{display:grid;grid-template-columns:2fr 3fr;min-height:min(74vh,680px)}
  .hero .ph{order:2;aspect-ratio:auto;max-height:none;height:100%}
  .hero-t{order:1;display:flex;align-items:flex-start;flex-direction:column;justify-content:center;padding:56px 40px 56px max(var(--pad),calc((100vw - var(--max))/2 + var(--pad)))}
  .pg{padding:64px 0 68px}
  .ba-grid{grid-template-columns:1fr 1fr;gap:40px}
  .svc-grid{grid-template-columns:repeat(3,1fr);gap:44px 28px}
  .step{grid-template-columns:90px 1fr 340px;gap:28px;align-items:center;padding:30px 0}
  .step .ph{max-height:none;aspect-ratio:4/3}
  .step .num{font-size:2.4rem}
  .cases{grid-template-columns:7fr 5fr;gap:48px 40px}
  .cases .case:nth-child(3){grid-column:1/-1;display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center}
  .cases .case:nth-child(3) h3{margin-top:0}
  .two{grid-template-columns:5fr 7fr;gap:56px}
  .vars{grid-template-columns:1fr 1fr;column-gap:40px}
  .about{display:grid;grid-template-columns:1fr 1fr;gap:64px}
  .faqwrap{display:grid;grid-template-columns:7fr 4fr;gap:64px;align-items:start}
  .cta-box{margin-top:0;position:sticky;top:96px}
  .cgrid{grid-template-columns:1fr 1fr}
  .list-cases{grid-template-columns:1fr 1fr;gap:44px 40px}
  .art .side{grid-template-columns:1fr 1fr}
  .art{padding:64px 0 16px}
}
@media (min-width:1100px){.nav a{padding:8px 18px}.sec{padding:112px 0}}

/* 모바일 표 → 항목별 카드 */
@media (max-width:767px){
  .cmp thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .cmp,.cmp tbody,.cmp tr,.cmp th,.cmp td{display:block;width:100%}
  .cmp tr{border:1px solid var(--line);margin-bottom:14px;background:var(--card)}
  .cmp tbody th{width:100%;padding:12px 14px;background:var(--ink);color:#fff;border:0;font-size:1rem}
  .cmp td{display:grid;grid-template-columns:6.4em 1fr;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line-s);font-size:.95rem}
  .cmp td:last-child{border-bottom:0}
  .cmp td::before{content:attr(data-l);color:var(--mut);font-size:.88rem;font-weight:600}
  .tbl thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .tbl,.tbl tbody,.tbl tr,.tbl th,.tbl td{display:block;width:100%}
  .tbl tr{border:1px solid var(--line);margin-bottom:12px;background:var(--card)}
  .tbl tbody th{width:100%;padding:10px 14px;background:var(--ink);color:#fff;border:0}
  .tbl td{display:grid;grid-template-columns:6.4em 1fr;gap:10px;padding:9px 14px;border-bottom:1px solid var(--line-s)}
  .tbl td:last-child{border-bottom:0}
  .tbl td::before{content:attr(data-l);color:var(--mut);font-size:.88rem;font-weight:600}
  .facts div{grid-template-columns:6.4em 1fr}
}
@media (max-width:359px){
  :root{--pad:16px}
  .btn{padding:0 18px;font-size:1.05rem}
  .tag{font-size:.74rem;padding:2px 7px}
  .svc-grid{gap:24px 10px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* 섹션 6 접이식 보조 설명 */
.fold summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;min-height:52px;border-top:1px solid var(--line)}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{content:"+";font-size:1.5rem;color:var(--cu);padding-left:10px}
.fold[open] summary::after{content:"–"}
@media (min-width:768px){.fold summary{pointer-events:none;border-top:0;min-height:0;margin-bottom:6px}.fold summary::after{display:none}}
@media (max-width:767px){
  #scope .sec-h{margin-bottom:18px}
  .cmp tr{margin-bottom:10px}
  .cmp tbody th{padding:9px 14px;font-size:.95rem}
  .cmp td{padding:7px 14px;font-size:.92rem;line-height:1.55;grid-template-columns:4.6em 1fr}
  #scope .two{margin-top:22px!important;gap:0}
  .fold:last-child summary{border-bottom:1px solid var(--line)}
  .fold[open]:last-child summary{border-bottom:0}
  .fold .chk li{padding:7px 0 7px 22px;font-size:.95rem}
  .fold .chk li::before{top:16px}
  .vars div{padding:9px 0}
  .note{margin-top:16px;padding:12px 14px;font-size:.92rem}
}

.cta-box .fold summary{border-top:1px solid rgba(255,255,255,.18);color:#fff}
.cta-box .fold h3{font-size:1rem}
@media (max-width:767px){
  #company .sec-h,#faq .sec-h{margin-bottom:16px}
  #company .about{display:block}
  #company .about>div+div{margin-top:28px}
  #company .facts div{padding:8px 0}
  #company .rg summary{min-height:50px}
  #faq .faq summary{min-height:54px;padding:12px 0}
  .cta-box{margin-top:28px;padding:22px 18px}
  .cta-box p{margin-top:4px}
  .cta-box ul{margin:8px 0 16px}
  .cta-box .fold summary{min-height:48px}
  .cta-box .fold:not([open]) ul{display:none}
  .cta-box>.btn{margin-top:14px}
}