/* ductcon.bosungworld.com — 덕트시공 */
:root{
  --deep:#1A2A2A;
  --accent:#E8D9C4;
  --accent-soft:#F5EEE4;
  --bg:#FFFFFF;
  --bg-soft:#F5F6F8;
  --ink:#1A1A1A;
  --desc:#475569;
  --bar-chrome:#ECEEF1;
  --border:#E5E7EB;
  --shadow-bottom:0 -6px 22px rgba(0,0,0,.08);
  --font-body:"Pretendard Variable",Pretendard,-apple-system,sans-serif;
  --font-kr:"Noto Sans KR","Pretendard Variable",Pretendard,sans-serif;
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px)}
body{margin:0;font-family:var(--font-body),var(--font-kr);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,p{margin:0}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
section{padding:88px 0}
@media (max-width:720px){section{padding:56px 0}}

/* ---------- 버튼 (형태: 라운드 필 · seed 랜덤) ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;white-space:nowrap;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,0,0,.12)}
.btn-outline{background:transparent;border-color:var(--accent);color:var(--ink)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff}

/* ---------- 헤더 (B-22: 히어로 위 투명 → 스크롤 시 연회색) ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);background:transparent;transition:background .3s ease,box-shadow .3s ease,border-color .3s ease}
.site-header.is-scrolled{background:var(--bar-chrome);border-bottom:1px solid var(--border);box-shadow:0 1px 16px rgba(0,0,0,.06)}
.header-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:800;font-size:20px;letter-spacing:-.02em;color:#fff;transition:color .3s ease}
.site-header.is-scrolled .logo{color:var(--ink)}
.nav-desktop{display:flex;align-items:center;gap:32px}
.nav-desktop ul{display:flex;gap:28px}
.nav-desktop a{font-size:15px;font-weight:500;color:#fff;transition:color .3s ease}
.site-header.is-scrolled .nav-desktop a:not(.btn){color:var(--ink)}
.nav-toggle{display:none;position:relative;width:40px;height:40px;background:none;border:0;color:#fff;transition:color .3s ease}
.site-header.is-scrolled .nav-toggle{color:var(--ink)}
.nav-toggle svg{position:absolute;inset:0;margin:auto;width:26px;height:26px}
.nav-toggle .i-close{opacity:0}
.nav-toggle[aria-expanded="true"] .i-open{opacity:0}
.nav-toggle[aria-expanded="true"] .i-close{opacity:1}
.nav-mobile{display:none;position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:#fff;z-index:99;padding:32px 24px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease}
.nav-mobile.is-open{display:block;opacity:1;transform:translateY(0);pointer-events:auto}
.nav-mobile ul{display:flex;flex-direction:column;gap:6px}
.nav-mobile a{display:block;padding:16px 4px;font-size:18px;font-weight:600;border-bottom:1px solid var(--border)}
.nav-mobile .btn{margin-top:16px;width:100%}
@media (max-width:860px){.nav-desktop{display:none}.nav-toggle{display:block}}

/* ---------- 히어로: 사진(케이스 상세) ---------- */
.hero-photo{position:relative;min-height:560px;display:flex;align-items:flex-end;background:#1A2A2A center/cover no-repeat;overflow:hidden}
.hero-photo-crawl{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0}
.hero-photo-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(10,15,15,.55) 0%,rgba(10,15,15,.15) 45%,rgba(255,255,255,.28) 100%)}
.hero-photo-text{position:relative;z-index:2;padding:120px 24px 56px;max-width:1120px;margin:0 auto;width:100%;color:#fff}
.hero-photo-text .eyebrow{font-size:13px;letter-spacing:.08em;font-weight:600;color:var(--accent);margin-bottom:14px}
.hero-photo-text h1{font-size:clamp(28px,4.2vw,46px);font-weight:800;letter-spacing:-.02em;text-shadow:0 2px 18px rgba(0,0,0,.35)}
@media (max-width:720px){.hero-photo{min-height:400px}.hero-photo-text{padding:100px 20px 40px}}

/* ---------- 히어로: 컬러(지역/가이드 — 사진 없는 곳, B-18) ---------- */
.hero-color{position:relative;min-height:320px;display:flex;align-items:center;padding-top:var(--header-h)}
.hero-color-v0{background:linear-gradient(135deg,#1A2A2A 0%,#2E4038 100%)}
.hero-color-v1{background:linear-gradient(135deg,#22322E 0%,#3A2A22 100%)}
.hero-color-v2{background:linear-gradient(135deg,#1E2A2A 0%,#243A34 100%)}
.hero-color-text{max-width:1120px;margin:0 auto;padding:56px 24px;color:#fff;width:100%}
.hero-color-text .eyebrow{font-size:13px;letter-spacing:.08em;font-weight:600;color:var(--accent);margin-bottom:14px}
.hero-color-text h1{font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:-.02em}

/* ---------- 메인 히어로 ---------- */
.main-hero{position:relative;min-height:92vh;display:flex;align-items:center;background:#0f1a17 center/cover no-repeat;overflow:hidden}
.main-hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;animation:heroPan 22s ease-in-out infinite alternate}
@keyframes heroPan{from{transform:scale(1.04) translate(0,0)}to{transform:scale(1.1) translate(-1.2%,-1%)}}
.main-hero-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(8,12,12,.72) 0%,rgba(8,12,12,.3) 55%,rgba(8,12,12,.1) 100%)}
.main-hero-inner{position:relative;z-index:2;max-width:1120px;margin:0 auto;padding:0 24px;width:100%;color:#fff}
.main-hero-inner .eyebrow{font-size:14px;letter-spacing:.1em;font-weight:600;color:var(--accent);margin-bottom:18px}
.main-hero-inner h1{font-size:clamp(32px,5.4vw,60px);font-weight:800;letter-spacing:-.03em;line-height:1.15;margin-bottom:20px}
.main-hero-inner .lead{font-size:17px;color:rgba(255,255,255,.82);max-width:520px;margin-bottom:34px;white-space:nowrap}
@media (max-width:720px){.main-hero-inner .lead{white-space:normal}}
.main-hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 섹션 공통 ---------- */
.sec-head{max-width:640px;margin:0 auto 48px;text-align:center}
.sec-head .eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--desc);margin-bottom:12px}
.sec-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.02em;white-space:nowrap}
@media (max-width:640px){.sec-head h2{white-space:normal}}
.sec-head p{color:var(--desc);margin-top:14px;font-size:15px}

/* ---------- 서비스: 아이콘 행 + 체크리스트형 (번호카드 금지) ---------- */
.service-list{display:flex;flex-direction:column;border-top:1px solid var(--border)}
.service-row{display:grid;grid-template-columns:56px 1fr auto;gap:22px;align-items:center;padding:26px 4px;border-bottom:1px solid var(--border)}
.service-row .s-icon{width:52px;height:52px;border-radius:14px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;color:var(--ink)}
.service-row .s-icon svg{width:26px;height:26px}
.service-row h3{font-size:19px;font-weight:700;margin-bottom:4px}
.service-row p{color:var(--desc);font-size:14.5px}
.service-row .s-mark{color:var(--desc);font-size:13px;font-weight:600}
@media (max-width:640px){.service-row{grid-template-columns:44px 1fr}.service-row .s-mark{display:none}}

/* ---------- 시공사례: 가로 스크롤 카드 ---------- */
.case-scroll{display:flex;gap:20px;overflow-x:auto;padding:8px 4px 20px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.case-scroll::-webkit-scrollbar{height:6px}
.case-scroll::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}
.case-card{flex:0 0 320px;scroll-snap-align:start;border-radius:16px;overflow:hidden;background:var(--bg-soft);border:1px solid var(--border)}
.case-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.case-card-body{padding:20px}
.case-card-body .c-mark{font-size:12px;color:var(--desc);font-weight:600;margin-bottom:8px}
.case-card-body h3{font-size:18px;font-weight:700;margin-bottom:8px}
.case-card-body p{font-size:14px;color:var(--desc);margin-bottom:14px}
.case-card-body .link{font-size:14px;font-weight:700;display:inline-flex;align-items:center;gap:6px}
.case-card-body .link svg{width:16px;height:16px}
.case-more{text-align:center;margin-top:36px}

/* ---------- 가이드: 세로 리스트(4칸 그리드 금지) ---------- */
.guide-list{border-top:1px solid var(--border)}
.guide-row{display:flex;align-items:center;gap:24px;padding:24px 4px;border-bottom:1px solid var(--border)}
.guide-row .g-num{font-size:13px;color:var(--desc);font-weight:700;width:32px;flex:none}
.guide-row .g-body{flex:1}
.guide-row h3{font-size:17px;font-weight:700;margin-bottom:4px}
.guide-row p{font-size:14px;color:var(--desc)}
.guide-row svg{width:20px;height:20px;color:var(--desc);flex:none}
@media (max-width:640px){.guide-row{gap:14px}.guide-row p{display:none}}

/* ---------- FAQ 아코디언 ---------- */
.faq-list{border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item summary{list-style:none;cursor:pointer;padding:22px 4px;display:flex;justify-content:space-between;gap:16px;font-weight:600;font-size:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q-mark{color:var(--desc);font-weight:700;margin-right:10px}
.faq-item summary svg{width:18px;height:18px;flex:none;transition:transform .2s ease;color:var(--desc)}
.faq-item[open] summary svg{transform:rotate(180deg)}
.faq-item .a{padding:0 4px 22px;color:var(--desc);font-size:14.5px;max-width:760px}

/* ---------- 정보 요약 카드(정보 콘텐츠 인덱스용, guide/index 소형 카드) ---------- */
.info-mini{display:flex;align-items:center;gap:14px;padding:16px;border:1px solid var(--border);border-radius:14px;background:var(--bg)}
.info-mini svg{width:22px;height:22px;flex:none;color:var(--ink)}

/* ---------- 교차 레이아웃 (상세/케이스/about 본문, 고정 스펙) ---------- */
.cross{padding:0}
.cross-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:64px 0}
.cross-row:nth-child(even){direction:rtl}
.cross-row:nth-child(even) > *{direction:ltr}
.cross-row img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:10px}
.cross-text .c-eyebrow{font-size:11px;letter-spacing:.08em;font-weight:700;color:var(--desc);margin-bottom:14px}
.cross-text h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;letter-spacing:-.01em;margin-bottom:18px}
.cross-text p{font-size:15px;line-height:1.9;color:#4B5563}
@media (max-width:820px){.cross-row{grid-template-columns:1fr;gap:24px;padding:40px 0}.cross-row:nth-child(even){direction:ltr}}

/* ---------- 시공 포인트 리스트 ---------- */
.point-list{display:flex;flex-direction:column;gap:12px;margin-top:18px}
.point-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--desc)}
.point-list svg{width:18px;height:18px;flex:none;color:var(--ink);margin-top:1px}

/* ---------- 갤러리(1열 3~4장) ---------- */
.gallery-1col{display:flex;flex-direction:column;gap:20px;max-width:760px;margin:0 auto}
.gallery-1col img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:10px}
.gallery-1col figcaption{font-size:13px;color:var(--desc);margin-top:8px;text-align:center}

/* ---------- 후기 없음 카드형 텍스트(방문 텍스트 콘텐츠) ---------- */

/* ---------- 지역/가이드 인접 링크 ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip{padding:9px 18px;border-radius:999px;border:1px solid var(--border);font-size:13.5px;font-weight:600}

/* ---------- 하단 상담 바 (스크롤 시 따라오는 CTA) ---------- */
.bottom-bar{position:fixed;left:0;right:0;bottom:0;z-index:190;background:var(--bar-chrome);border-top:1px solid var(--border);box-shadow:var(--shadow-bottom);padding:12px 20px;display:flex;justify-content:center;transform:translateY(100%);opacity:0;pointer-events:none;transition:transform .3s ease,opacity .3s ease}
.bottom-bar.is-visible{transform:translateY(0);opacity:1;pointer-events:auto}
.bottom-bar-cta{width:100%;max-width:420px;min-height:48px}

/* ---------- Closing (FAQ 하단 · 시공사진 클로징) ---------- */
.closing{background:var(--deep);padding:72px 0 0}
.closing-inner{max-width:1120px;margin:0 auto;padding:0 24px;text-align:center}
.closing-photos{display:flex;gap:14px;margin-bottom:32px}
.closing-photos img{flex:1;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:14px}
.closing-copy{color:#fff;font-size:clamp(18px,2.4vw,24px);font-weight:700;letter-spacing:-.01em;margin-bottom:24px}
@media (max-width:640px){.closing-photos{flex-direction:column}.closing-photos img{aspect-ratio:16/10}}

/* ---------- 푸터 ---------- */
.site-footer{background:var(--deep);color:rgba(255,255,255,.86)}
.footer-inner{max-width:1120px;margin:0 auto;padding:56px 24px 40px;display:grid;grid-template-columns:1fr 1fr;gap:48px}
.footer-biz-name{font-weight:700;color:#fff;margin-bottom:10px;font-size:15px}
.footer-biz-reg{display:flex;gap:8px;font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:8px}
.footer-biz-hours{font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:20px;white-space:nowrap}
.footer-cta-row{display:flex;gap:10px}
.footer-sitemap{opacity:.42}
.footer-sitemap > a{display:inline-block;font-size:12.5px;margin-bottom:14px;color:rgba(255,255,255,.7)}
.footer-sitemap ul{display:flex;flex-wrap:wrap;gap:8px 16px}
.footer-sitemap li a{font-size:11.5px;color:rgba(255,255,255,.55)}
@media (max-width:720px){
  .footer-inner{grid-template-columns:1fr;text-align:center;gap:28px}
  .footer-biz-reg{flex-direction:column;gap:2px;align-items:center}
  .footer-cta-row{justify-content:center}
  .footer-sitemap ul{justify-content:center}
  .chip-row{justify-content:center}
}

/* ---------- 모바일 공통 정렬 ---------- */
@media (max-width:640px){
  .sec-head{text-align:center}
  .point-list{align-items:flex-start}
}