/* 난방분배기교체비용 — 웜아이보리 #F5F1E9 / 잉크 #273531 / 구리 #A86D46 */
:root{--bg:#F5F1E9;--bg2:#FBF8F1;--beige:#EBE3D3;--ink:#273531;--muted:#55625D;--copper:#A86D46;--copper-d:#8F5733;--btn:#9A5F3B;--line:#DCD2BF;--white:#fff;--r:6px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:auto}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 "Pretendard","Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;word-break:keep-all;overflow-wrap:break-word;padding-bottom:calc(72px + env(safe-area-inset-bottom))}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
p{margin:0 0 .9em}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
ul,ol{margin:0;padding:0}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 14px;z-index:99}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:3px solid var(--copper-d);outline-offset:2px}

/* 버튼 — 터치 영역 44px 이상 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:var(--r);background:var(--btn);color:#fff;font-weight:700;font-size:16px;text-decoration:none;border:1.5px solid var(--btn);cursor:pointer;line-height:1.2}
.btn:hover{background:var(--copper-d);border-color:var(--copper-d)}
.btn-line{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-line:hover{background:var(--ink);border-color:var(--ink);color:#fff}
.btn-sm{min-height:44px;padding:0 18px;font-size:15px}
.txt-link{display:inline-flex;align-items:center;min-height:44px;font-weight:600;color:var(--ink);text-decoration:underline;text-decoration-color:var(--copper);text-underline-offset:5px;text-decoration-thickness:2px}

/* 헤더 */
.hd{background:var(--bg);border-bottom:1px solid var(--line)}
.hd-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:0 16px}
.brand{font-weight:800;font-size:20px;text-decoration:none;min-height:48px;display:inline-flex;align-items:center;letter-spacing:-.02em}
.gnb{display:flex;width:100%;order:3;border-top:1px solid var(--line)}
.gnb a{flex:1;text-align:center;min-height:44px;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;text-decoration:none}
.hd-cta{display:none}

/* 히어로 — 모바일: 사진 → 제목·설명 → 버튼 */
.hero{display:grid;background:var(--bg2)}
.hero-img{order:-1;aspect-ratio:4/3;max-height:320px;overflow:hidden;background:var(--beige)}
.hero-img img{width:100%;height:100%;object-fit:cover}
.hero-txt{padding:22px 0 26px}
.eyebrow{margin:0 0 6px;color:var(--copper-d);font-weight:700;font-size:14px;letter-spacing:.02em}
.hero h1{font-size:clamp(32px,9vw,54px);font-weight:800;letter-spacing:-.03em;margin-bottom:8px}
.hero .sub{font-size:clamp(18px,4.6vw,22px);font-weight:700;margin-bottom:12px}
.hero .desc{color:var(--muted);margin-bottom:10px}
.hero .answer{font-size:15.5px;padding-left:12px;border-left:3px solid var(--copper);margin:0 0 18px}
.hero .acts{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:center}
.hero .acts .btn{flex:1 1 100%}

/* 섹션 공통 */
.sec{padding:36px 0;border-top:1px solid var(--line)}
.sec h2{font-size:clamp(22px,5.4vw,30px);font-weight:800;margin-bottom:10px}
.sec .intro{color:var(--muted);max-width:60ch}
.no{display:block;color:var(--copper-d);font-weight:700;font-size:13px;letter-spacing:.06em;margin-bottom:4px}
.sec.beige{background:var(--beige)}
.sec.soft{background:var(--bg2)}

/* 2. 사진 분배기 */
.anat{display:grid;gap:16px;margin-top:16px}
.anat-fig{position:relative;border-radius:var(--r);overflow:hidden;background:var(--beige)}
.anat-fig img{width:100%;height:auto}
.hs{position:absolute;width:44px;height:44px;margin:-22px 0 0 -22px;padding:0;border:0;background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center}
.hs i{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:rgba(255,255,255,.94);color:var(--copper-d);font:700 14px/1 inherit;font-style:normal;border:2px solid var(--copper);box-shadow:0 1px 4px rgba(0,0,0,.35)}
.hs b{display:none}
.hs.on i,.hs:hover i{background:var(--btn);color:#fff;border-color:#fff}
.parts{list-style:none;border-top:1px solid var(--line)}
.part{border-bottom:1px solid var(--line)}
.part-h{display:flex;align-items:center;gap:10px;width:100%;min-height:48px;padding:6px 2px;background:none;border:0;font:700 16px/1.4 inherit;color:var(--ink);text-align:left;cursor:pointer}
.part-h span{display:inline-flex;align-items:center;justify-content:center;flex:0 0 26px;height:26px;border-radius:50%;background:var(--copper);color:#fff;font-size:13px}
.part-h em{font-style:normal;font-weight:500;color:var(--muted);font-size:14px;margin-left:auto}
.part p{margin:0 0 12px 36px;font-size:15.5px}
.js .part:not(.on) p{display:none}
.part.on .part-h{color:var(--copper-d)}

/* 3. 비용 요소 */
.factors{list-style:none;margin-top:14px}
.factor{display:grid;gap:12px;padding:18px 0;border-top:1px solid var(--line)}
.factor:first-child{border-top:0}
.factor figure{margin:0;border-radius:var(--r);overflow:hidden;background:var(--beige)}
.factor img{width:100%;aspect-ratio:4/3;object-fit:cover}
.factor h3{font-size:19px;margin-bottom:6px}
.factor h3 span{color:var(--copper-d);margin-right:8px;font-size:15px}
.note{font-size:15px;color:var(--muted);padding:12px 14px;background:var(--white);border-left:3px solid var(--copper);margin-top:16px}

/* 표 */
.tbl{margin:14px 0;overflow-x:auto}
.rt{width:100%;border-collapse:collapse;background:var(--white);font-size:15.5px}
.rt caption{text-align:left;font-weight:700;padding:0 0 8px;font-size:15px;color:var(--muted)}
.rt th,.rt td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.rt thead th{background:var(--ink);color:#fff;font-size:14px;font-weight:700}
.rt tbody th{font-weight:700;width:24%}
@media (max-width:719px){
  .rt thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .rt,.rt tbody,.rt tr,.rt th,.rt td{display:block;width:auto}
  .rt tr{border:1px solid var(--line);border-radius:var(--r);margin-bottom:10px;overflow:hidden}
  .rt tbody th{width:auto;background:var(--beige);border-bottom:1px solid var(--line)}
  .rt td{display:grid;grid-template-columns:5.6em 1fr;gap:8px;border-bottom:1px solid var(--line)}
  .rt td:last-child{border-bottom:0}
  .rt td::before{content:attr(data-label);font-weight:700;font-size:13.5px;color:var(--copper-d)}
  .rt caption{display:block}
}

/* 4. 실제 교체 현장 */
.cases{list-style:none;margin-top:16px}
.case{padding:20px 0;border-top:1px solid var(--line)}
.case:first-child{border-top:0}
.case h3{font-size:19px;margin-bottom:10px}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.pair>div{position:relative;border-radius:var(--r);overflow:hidden;background:var(--beige)}
.pair img{width:100%;aspect-ratio:1/1;object-fit:cover}
.tag{position:absolute;left:8px;top:8px;z-index:1;background:var(--ink);color:#fff;font-size:13px;font-weight:700;padding:3px 9px;border-radius:3px;line-height:1.4}
.tag-a{background:var(--btn)}
.case dl{margin:12px 0 0;display:grid;gap:4px 12px;font-size:15.5px}
.case dt{font-weight:700;color:var(--copper-d);font-size:14px}
.case dd{margin:0 0 6px}

/* 5. 진행 과정 */
.steps{list-style:none;margin-top:16px;counter-reset:s}
.step{display:grid;grid-template-columns:132px 1fr;gap:14px;padding:16px 0;border-top:1px solid var(--line);align-items:start}
.step:first-child{border-top:0}
.step figure{margin:0;border-radius:var(--r);overflow:hidden;background:var(--beige)}
.step img{width:100%;aspect-ratio:1/1;object-fit:cover}
.step h3{font-size:18px;margin-bottom:4px}
.step h3 span{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:var(--btn);color:#fff;font-size:13px;margin-right:8px;vertical-align:2px}
.step p{font-size:15.5px;margin:0}

/* 6. 견적 */
.cm-note{margin-top:12px}

/* 7. 서비스·지역·운영 */
.tabs{display:flex;gap:0;margin:16px 0 0;border-bottom:2px solid var(--line)}
.tabs button{flex:1;min-height:48px;background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-2px;font:700 16px/1.2 inherit;color:var(--muted);cursor:pointer}
.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--copper)}
.links{list-style:none}
.links li{border-bottom:1px solid var(--line)}
.links a{display:block;padding:12px 2px;min-height:48px;text-decoration:none}
.links a b{display:block;font-size:16.5px}
.links a span{display:block;font-size:14.5px;color:var(--muted);line-height:1.5}
.links a:hover b{color:var(--copper-d);text-decoration:underline}
.cols{display:grid;gap:0 36px}
.cols h3{font-size:18px;margin:18px 0 4px}
.js .tabpanel[hidden]{display:none}
.ops{margin-top:22px;padding-top:6px;border-top:1px solid var(--line)}
.ops h3{font-size:18px;margin:14px 0 6px}
.ops p{font-size:15.5px}
.kv{display:grid;grid-template-columns:7.5em 1fr;gap:4px 10px;font-size:15.5px;margin:8px 0 14px}
.kv dt{font-weight:700;color:var(--copper-d)}
.kv dd{margin:0}
.rel-sites{list-style:none;margin-top:6px}
.rel-sites li{padding:10px 0;border-bottom:1px solid var(--line);font-size:15.5px}
.rel-sites a{font-weight:700}

/* 8. FAQ + 상담 */
.faq{margin-top:14px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);background:transparent}
.faq summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;padding:10px 2px;font-weight:700;cursor:pointer}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:0 0 10px;width:10px;height:10px;border-right:2px solid var(--copper-d);border-bottom:2px solid var(--copper-d);transform:rotate(45deg);margin:-4px 6px 0 0;transition:transform .15s}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:4px}
.faq-a{padding:0 2px 8px}
.faq-a p{margin:0 0 .6em;color:#33423d}
.consult{margin-top:26px;padding:22px 18px;background:var(--white);border:1px solid var(--line);border-top:3px solid var(--copper)}
.consult h3{font-size:20px;margin-bottom:6px}
.cta-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}

/* 푸터 */
.ft{background:var(--ink);color:#E9E4D8;padding:26px 0 22px;margin-top:0}
.ft-in{display:grid;gap:16px}
.ft p{margin:0 0 3px;font-size:14.5px;line-height:1.65}
.ft-name{font-weight:800;font-size:17px!important;color:#fff;margin-bottom:6px!important}
.ft-act{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center}
.ft .btn-line{color:#fff;border-color:#E9E4D8}
.ft .btn-line:hover{background:#fff;color:var(--ink)}
.ft-link{display:inline-flex;align-items:center;min-height:44px;color:#E9E4D8;font-size:15px}
.ft-copy{opacity:.75}

/* 하단 고정 상담 바(모바일) — body padding-bottom 으로 본문·푸터를 가리지 않는다 */
.dock{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:8px 12px calc(8px + env(safe-area-inset-bottom));background:rgba(245,241,233,.97);border-top:1px solid var(--line)}
.dock .btn{min-height:48px}

/* 상세페이지 */
.detail{background:var(--bg)}
.crumb{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:4px 0 0;font-size:14px;color:var(--muted)}
.crumb a{display:inline-flex;align-items:center;min-height:44px;padding-right:4px}
.d-head{padding:10px 0 26px}
.d-head h1{font-size:clamp(30px,8vw,46px);font-weight:800;letter-spacing:-.03em;margin-bottom:10px}
.d-topic{font-size:clamp(19px,5vw,25px);font-weight:700;color:var(--copper-d);margin-bottom:14px}
.answer{font-size:17px;max-width:62ch;margin:0}
.d-sec{padding:28px 0;border-top:1px solid var(--line)}
.d-sec.alt{background:var(--bg2)}
.d-sec h3{font-size:clamp(20px,5vw,25px);margin-bottom:10px;font-weight:800}
.d-narrow{max-width:760px}
.d-narrow-p{max-width:62ch;color:var(--muted)}
.ticks{list-style:none;margin:10px 0}
.ticks li{position:relative;padding:6px 0 6px 22px}
.ticks li::before{content:"";position:absolute;left:2px;top:15px;width:10px;height:2px;background:var(--copper)}
.shot{margin:18px 0 0;padding-top:18px;border-top:1px solid var(--line)}
.shot:first-of-type{border-top:0;padding-top:4px}
.shot .single{max-width:560px;border-radius:var(--r);overflow:hidden;background:var(--beige)}
.shot .single img{width:100%;height:auto}
.shot figcaption{margin-top:10px;font-size:15.5px;max-width:70ch}
.shot figcaption b{display:block;color:var(--copper-d);font-size:16px;margin-bottom:2px}
.cta .cta-row{max-width:420px}
.rel-h{font-size:15px;margin:22px 0 4px;color:var(--muted)}
.rel{list-style:none}
.rel a{display:flex;align-items:center;min-height:44px;font-weight:600}

/* ≥720px */
@media (min-width:720px){
  .wrap{padding:0 28px}
  .part p{margin-left:36px}
  .hs b{display:block;position:absolute;left:34px;top:50%;transform:translateY(-50%);white-space:nowrap;background:rgba(255,255,255,.95);padding:2px 8px;border-radius:3px;font-size:13px;font-weight:700;color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.25);pointer-events:none}
  .anat{grid-template-columns:7fr 5fr;align-items:center;gap:28px}
  .factor{grid-template-columns:260px 1fr;gap:24px;align-items:center}
  .step{grid-template-columns:200px 1fr;gap:24px}
  .pair{gap:8px}
  .pair img{aspect-ratio:4/3}
  .case{display:grid;grid-template-columns:1.25fr 1fr;gap:26px;align-items:start}
  .case h3{grid-column:1/-1;margin-bottom:0}
  .case dl{margin-top:0}
  .shot{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:start}
  .shot figcaption{margin-top:0}
  .shot .single{max-width:none}
}

/* ≥900px */
@media (min-width:900px){
  body{padding-bottom:0}
  .dock{display:none}
  .hd{position:sticky;top:0;z-index:30}
  .hd-in{flex-wrap:nowrap;min-height:64px}
  .gnb{order:0;width:auto;border:0;gap:6px;margin-left:auto}
  .gnb a{flex:none;padding:0 14px;font-size:15px}
  .hd-cta{display:inline-flex}
  .hero{grid-template-columns:minmax(0,5fr) minmax(0,7fr);min-height:520px;background:linear-gradient(90deg,var(--bg2) 0,var(--bg2) 100%)}
  .hero-img{order:0;aspect-ratio:auto;max-height:none;min-height:520px}
  .hero-img{position:relative}
  .hero-img img{position:absolute;inset:0}
  .hero-txt{display:flex;flex-direction:column;justify-content:center;padding:44px max(28px,calc((100vw - 1120px)/2)) 44px max(28px,calc((100vw - 1120px)/2))}
  .hero-txt>*{max-width:470px}
  .hero .acts .btn{flex:0 0 auto}
  .sec{padding:56px 0}
  .tabs{display:none}
  .tabpanel[hidden]{display:block!important}
  .cols{grid-template-columns:1fr 1fr}
  .cols>.tabpanel>h3:first-child{margin-top:0}
  .ops-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
  .consult{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
  .consult .cta-row{margin-top:0;min-width:340px}
  .ft-in{grid-template-columns:1.6fr 1fr;align-items:start}
  .ft-act{justify-content:flex-end}
  .ft-copy{grid-column:1/-1}
  .d-sec{padding:40px 0}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}