/* 전열교환기 이전설치 · 보성에이치테크 — apt 에디토리얼 완전판
   font_id=5(노랑풍선 전한글 Pretendard) · accent_id=9(버건디) · apt ink/yellow 고정 */
:root{
  --ink:#13130A; --yellow:#FEEB8F;
  --accent:#8B3548; --accent-soft:#F0E4E7; --accent-fg:#FFFFFF;
  --bar-chrome:#E6E8EB;
  --font: "Pretendard","Pretendard Variable",-apple-system,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--font);color:var(--ink);background:#fff;letter-spacing:-0.3px;word-break:keep-all;-webkit-font-smoothing:antialiased;line-height:1.6}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--font);font-weight:700;margin:0 0 16px;line-height:1.3}
h1{font-size:clamp(28px,4vw,44px)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:820px}
.center{text-align:center}

/* ── 헤더 (B-22: 투명→스크롤시 연회색) ───────────────────── */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:transparent;transition:background .3s ease,box-shadow .3s ease}
.site-header.is-scrolled{background:var(--bar-chrome);box-shadow:0 1px 16px rgba(0,0,0,.06);border-bottom:1px solid #E5E7EB}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:9px}
.logo-icon{width:32px;height:32px;flex-shrink:0;color:#fff;transition:color .3s}
.logo-icon svg{width:100%;height:100%;display:block}
.site-header.is-scrolled .logo-icon{color:var(--accent)}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-brand{font-size:.95rem;font-weight:700;color:#fff;transition:color .3s}
.logo-keyword{font-size:.7rem;font-weight:400;color:var(--yellow);letter-spacing:.02em}
.site-header.is-scrolled .logo-brand{color:var(--ink)}
.site-header:not(.is-scrolled) .logo-keyword{color:var(--yellow)}
.site-header.is-scrolled .logo-keyword{color:var(--accent)}
.home-noimage .site-header{background:var(--bar-chrome);box-shadow:0 1px 16px rgba(0,0,0,.06)}
.nav-menu{display:flex;align-items:center;gap:30px}
.nav-menu a{font-size:17px;font-weight:400;letter-spacing:-.3px;color:#fff;transition:color .3s}
.site-header.is-scrolled .nav-menu a{color:var(--ink)}
.nav-menu a.active{font-weight:600}
.nav-menu a.nav-cta{background:var(--ink);color:#fff!important;padding:11px 24px;border-radius:50px;font-weight:600}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:22px;height:2px;background:#fff;transition:background .3s}
.site-header.is-scrolled .hamburger span{background:var(--ink)}
.mobile-nav{position:fixed;top:76px;left:0;right:0;background:#fff;z-index:99;display:none;flex-direction:column;padding:12px 24px 24px;box-shadow:0 8px 20px rgba(0,0,0,.08)}
.mobile-nav.open{display:flex}
.mobile-nav a{padding:14px 0;border-bottom:1px solid #F0F0EE;font-size:16px}
.mobile-nav a.nav-cta{margin-top:12px;background:var(--ink);color:#fff;text-align:center;border-radius:50px;padding:14px}

/* ── 홈 히어로 (apt A: 풀폭 실사 크로스페이드) ──────────── */
.hero-apt{position:relative;height:92vh;min-height:620px;overflow:hidden;color:#fff}
.hero-slides{position:absolute;inset:0}
.hero-slides .slide{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;animation:heroFade 15s infinite}
.hero-slides .s1{animation-delay:0s}
.hero-slides .s2{animation-delay:5s}
.hero-slides .s3{animation-delay:10s}
@keyframes heroFade{0%{opacity:0}5%{opacity:1}30%{opacity:1}35%{opacity:0}100%{opacity:0}}
.hero-scrim{position:absolute;inset:0;background:linear-gradient(0deg,rgba(19,19,10,.72) 0%,rgba(19,19,10,.28) 45%,rgba(19,19,10,.15) 100%)}
.hero-content{position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding-bottom:88px}
.hero-eyebrow{font-size:13px;letter-spacing:.12em;color:var(--yellow);font-weight:600;margin-bottom:14px}
.hero-apt h1{color:#fff;font-size:clamp(34px,5.2vw,58px);margin-bottom:18px}
.hero-desc{max-width:640px;color:#F3F3EF;font-size:16px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn-ink{background:var(--ink);color:#fff;height:56px;display:inline-flex;align-items:center;padding:0 28px;border-radius:50px;font-weight:600;font-size:15px}
.btn-outline{border:1.5px solid #fff;color:#fff;height:56px;display:inline-flex;align-items:center;padding:0 28px;border-radius:50px;font-weight:600;font-size:15px}
.btn-ink.big,.btn-outline.big{height:64px;padding:0 34px;font-size:16px}

/* ── 섹션 공통 ─────────────────────────────────────────── */
.section{padding:96px 0}
.section-head{margin-bottom:40px}
.section-head.center{text-align:center}
.section-title{font-size:clamp(24px,3vw,34px);white-space:normal}
.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--accent);margin-bottom:14px;text-transform:uppercase}
.eyebrow svg{flex-shrink:0}
.lead{font-size:18px;color:#3a3a34}
.link-more{display:inline-block;margin-top:24px;font-weight:600;color:var(--accent)}

/* ── 소개 스플릿 ───────────────────────────────────────── */
.intro-split-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.intro-img img{border-radius:12px;width:100%;height:420px;object-fit:cover}
.about-list{padding-left:20px;margin:20px 0}
.about-list li{margin-bottom:10px}

/* ── 서비스 아이콘 (section_variant 9 apt-service-icons) ── */
.svc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--ink)}
.svc-card{padding:32px 20px;border-right:1px solid #E0E0DC}
.svc-card:last-child{border-right:none}
.svc-icon{display:block;width:44px;height:44px;flex-shrink:0;overflow:hidden;margin-bottom:18px}
.svc-icon svg{display:block;width:100%;height:100%;max-width:44px;max-height:44px}
.svc-card h3{font-size:17px;margin-bottom:8px}
.svc-card p{font-size:13.5px;color:#5B6169;line-height:1.65}
@media(max-width:900px){.svc-grid{grid-template-columns:repeat(2,1fr)}.svc-card{border-right:1px solid #E0E0DC}.svc-card:nth-child(2n){border-right:none}}

/* ── 비용 표 ───────────────────────────────────────────── */
.cost-table{width:100%;border-collapse:collapse;margin-top:8px;font-size:14.5px}
.cost-table th,.cost-table td{border:1px solid #E3E3DF;padding:14px 16px;text-align:left}
.cost-table th{background:var(--ink);color:#fff;font-weight:600}
.cost-table tr:nth-child(even) td{background:#FAFAF8}
.table-note{font-size:13px;color:#8a8a80;margin-top:10px}

/* ── PROCESS (고정 클래스명) ───────────────────────────── */
.process-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #E0E0DC}
.process-item{padding:28px 20px 28px 24px;border-right:1px solid #E0E0DC}
.process-item:first-child{padding-left:0}
.process-item:last-child{border-right:none}
.pnum{display:block;font-size:13px;font-weight:700;color:var(--accent);margin-bottom:10px}
.process-item h3{font-size:16px;font-weight:800;color:#22262B;margin:0 0 8px}
.process-item p{font-size:13.5px;color:#5B6169;line-height:1.65;margin:0}
@media(max-width:767px){.process-list{grid-template-columns:1fr 1fr}.process-item{padding-left:20px}.process-item:first-child{padding-left:20px}}

/* ── 시공사례 카드 (apt-journal / apt-portfolio) ─────────── */
.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.case-card{display:block;background:#fff}
.case-card-img{border-radius:12px;overflow:hidden;margin-bottom:16px}
.case-card-img img{width:100%;height:220px;object-fit:cover;transition:transform .4s}
.case-card:hover .case-card-img img{transform:scale(1.05)}
.case-card-date{font-size:12px;color:#9a9a90}
.case-card h3{font-size:20px;margin:8px 0 8px}
.case-card p{font-size:14px;color:#5B6169}

/* ── 가이드 카드 ───────────────────────────────────────── */
.guide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:22px}
.guide-card{display:block;padding:28px 24px;border:1px solid #E5E5E1;border-radius:12px;transition:border-color .2s,transform .2s}
.guide-card:hover{border-color:var(--ink);transform:translateY(-4px)}
.guide-card h3{font-size:17px;margin-bottom:10px}
.guide-card p{font-size:13.5px;color:#5B6169}

/* ── 지역 칩 ───────────────────────────────────────────── */
.area-grid{display:flex;flex-wrap:wrap;gap:12px}
.area-chip{padding:12px 20px;border:1px solid #D9D9D3;border-radius:50px;font-size:14px;font-weight:500;transition:background .2s,color .2s,border-color .2s}
.area-chip:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ── FAQ (native details/summary) ─────────────────────── */
.faq-list{display:flex;flex-direction:column;gap:2px}
.faq-item{border-bottom:1px solid #E5E5E1;padding:20px 0}
.faq-item summary{cursor:pointer;font-weight:600;font-size:16px;list-style:none;position:relative;padding-right:28px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:0;top:0;font-size:20px;color:var(--accent)}
.faq-item[open] summary::after{content:"−"}
.faq-a{margin-top:14px;font-size:14.5px;color:#4B5563;line-height:1.7}

/* ── 페이지 히어로 (서브페이지 상단 배경) ──────────────── */
.page-hero{position:relative;height:340px;background-size:cover;background-position:center;display:flex;align-items:flex-end;color:#fff;margin-top:0}
.page-hero-scrim{position:absolute;inset:0;background:linear-gradient(0deg,rgba(19,19,10,.75),rgba(19,19,10,.35))}
.page-hero .wrap{position:relative;padding-bottom:40px}
.page-hero h1{color:#fff;margin:0}
.hero-service{position:relative;height:420px;background-size:cover;background-position:center;display:flex;align-items:center;color:var(--ink)}
.hero-service::before{content:"";position:absolute;inset:0;background:rgba(255,255,255,.72)}
.hero-service .wrap{position:relative}
.hero-service p{font-size:16px;max-width:560px}

/* ── 시공사례 상세 (journal형) ─────────────────────────── */
.case-label{font-size:12px;color:#9a9a90;margin-bottom:20px}
.case-main-img{width:550px;max-width:100%;height:410px;object-fit:cover;border-radius:18px;margin-bottom:40px}
.case-body{font-size:15.5px;color:#333}
.case-body p{margin:0 0 20px}
.stage-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:40px 0}
.stage-item{text-align:center}
.stage-item img{width:100%;height:auto;max-height:500px;object-fit:contain;border-radius:12px;background:#F3F3F1}
.stage-item span{display:block;margin-top:10px;font-size:13px;color:#5B6169;font-weight:600}
.case-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.case-gallery img{width:100%;height:auto;max-height:500px;object-fit:contain;background:#F3F3F1;border-radius:12px;cursor:zoom-in}
.related-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.related-card{display:block}
.related-card img{width:100%;height:180px;object-fit:cover;border-radius:12px;margin-bottom:10px}
.related-card span{font-size:15px;font-weight:600}
@media(max-width:640px){.stage-row{grid-template-columns:1fr}.case-gallery{grid-template-columns:1fr 1fr}}

/* ── Closing (B-25) ────────────────────────────────────── */
.closing{position:relative;height:650px;overflow:hidden}
.closing img{width:100%;height:100%;object-fit:cover}
.closing-overlay{position:absolute;inset:0;background:rgba(19,19,19,.55);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;color:#fff}
.closing-overlay h2{color:#fff;font-size:clamp(22px,3vw,32px);margin-bottom:16px}
.closing-quote{font-size:15px;color:#EDEDED;max-width:560px;margin-bottom:28px}
.closing-cta{border:1px solid #fff;color:#fff;padding:16px 36px;border-radius:0;font-weight:600;font-size:15px}

/* ── 푸터 (기본 흰색, seed%4!=0) ───────────────────────── */
.site-footer{background:#fff;color:var(--ink);border-top:1px solid #E5E5E5;padding:56px 0 20px}
.footer-inner{display:flex;flex-wrap:wrap;gap:32px;justify-content:space-between;padding-bottom:32px}
.footer-brand{font-weight:700;margin-bottom:8px}
.footer-biz p{font-size:13.5px;color:#5B6169;margin:4px 0}
.footer-links{display:flex;flex-wrap:wrap;gap:16px;align-content:flex-start}
.footer-links a{font-size:13.5px;color:#5B6169}
.footer-cta{display:flex;gap:10px;align-items:flex-start}
.footer-btn{border:1px solid var(--ink);padding:10px 18px;border-radius:50px;font-size:13.5px;font-weight:600}
.footer-btn.ghost{border-color:#D9D9D3;color:#5B6169}
.copyright{text-align:center;font-size:12px;color:#9a9a90;padding-top:20px;border-top:1px solid #F0F0EE}

/* ── 모바일 하단바 / 플로팅 ────────────────────────────── */
.mobile-bottom-bar{display:none;position:fixed;bottom:0;left:0;right:0;z-index:98;background:var(--bar-chrome);border-top:1px solid #E5E7EB;box-shadow:0 -6px 22px rgba(0,0,0,.08)}
.mb-btn{flex:1;text-align:center;padding:16px 0;font-weight:600;font-size:15px;color:var(--ink)}
.mb-btn.primary{background:var(--ink);color:#fff}
.floating-cta{position:fixed;right:24px;bottom:24px;width:60px;height:60px;border-radius:50%;background:var(--yellow);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 6px 20px rgba(0,0,0,.18);z-index:97}
.floating-panel{position:fixed;right:24px;bottom:94px;background:#fff;border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,.16);padding:14px 20px;font-weight:700;display:none;z-index:97}
.floating-panel.open{display:block}
@media(max-width:767px){
  .mobile-bottom-bar{display:flex}
  .floating-cta{display:none}
  body{padding-bottom:0}
}
@media(min-width:768px){.mobile-bottom-bar{display:none!important}}

/* ── 라이트박스 ────────────────────────────────────────── */
.lb-overlay{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:200;display:none;align-items:center;justify-content:center}
.lb-overlay.open{display:flex}
.lb-overlay img{max-width:90vw;max-height:88vh;object-fit:contain;border-radius:4px}
.lb-close{position:absolute;top:24px;right:32px;color:#fff;font-size:34px;cursor:pointer;background:none;border:none}
.lb-arrow{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:44px;cursor:pointer;background:none;border:none;padding:12px}
.lb-prev{left:12px}.lb-next{right:12px}

@media(max-width:900px){
  .nav-menu{display:none}
  .hamburger{display:flex}
  .intro-split-inner{grid-template-columns:1fr}
  .footer-inner{flex-direction:column}
}
@media(max-width:640px){
  .hero-apt{height:82vh}
  .section{padding:64px 0}
  .case-gallery{grid-template-columns:1fr 1fr}
}