/* 보일러마트 — Swiss/Editorial 평면 디자인 (구조 참고: partremodeling.jibsarepair.com, 컬러는 별도) */
:root{
  --bg:#F6F5F2;--surface:#fff;--surface-2:#ECEAE4;--ink:#17202A;--ink-soft:#4B5560;--ink-faint:#86909A;
  --line:#DAD7CE;--accent:#B8420F;--accent-dark:#8E3109;--accent-soft:#F6E6DD;
  --panel:#14202B;--panel-text:#F3F1EC;--panel-muted:#9FAAB5;
  --radius:3px;--maxw:1200px;--gutter:clamp(20px,4vw,48px);--pad:clamp(56px,8vw,104px);
  --font:'Pretendard Variable','Pretendard',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif;
}
@font-face{font-family:'Pretendard Variable';src:url('https://cdn.jsdelivr.net/npm/pretendard@1.3.9/dist/web/variable/woff2/PretendardVariable.woff2') format('woff2-variations');font-weight:45 920;font-display:swap}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;letter-spacing:-.008em;word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.015em;line-height:1.3}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.sec{padding:var(--pad) 0}
.sec-alt{background:var(--surface-2)}
.sec-invert{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-dark{background:var(--panel);color:var(--panel-text)}
.sec-dark .sec-desc{color:var(--panel-muted)}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.12em;color:var(--accent);margin-bottom:12px}
.sec-dark .eyebrow{color:#E8A27F}
.sec-title{font-size:clamp(1.6rem,3.6vw,2.4rem);margin-bottom:14px}
.sec-desc{color:var(--ink-soft);max-width:680px}
.btn{display:inline-block;padding:14px 26px;background:var(--accent);color:#fff;font-weight:700;border-radius:var(--radius);border:1px solid var(--accent)}
.btn:hover{background:var(--accent-dark)}
.btn-line{background:transparent;color:inherit;border-color:currentColor}
.btn-line:hover{background:rgba(128,128,128,.15)}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-weight:800;font-size:1.05rem;display:flex;align-items:center;gap:10px}
.logo b{display:inline-grid;place-items:center;width:30px;height:30px;background:var(--accent);color:#fff;border-radius:var(--radius);font-size:.95rem}
.nav{display:flex;gap:22px;font-size:.93rem;font-weight:600}
.nav a:hover{color:var(--accent)}
.hdr .btn{padding:9px 18px;font-size:.9rem}
/* hero */
.hero{padding:clamp(40px,6vw,80px) 0;border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(24px,5vw,64px);align-items:center}
.hero h1{font-size:clamp(2.2rem,5.4vw,3.8rem);margin-bottom:20px}
.hero .lead{font-size:1.08rem;color:var(--ink-soft);max-width:560px}
.hero .cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.hero-img{aspect-ratio:4/5;overflow:hidden;border-radius:var(--radius);background:var(--surface-2)}
.hero-img img{width:100%;height:100%;object-fit:cover}
/* grids/cards */
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.g2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.pt{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.pt .num{font-size:2rem;font-weight:800;color:var(--ink-faint);display:block;line-height:1;margin-bottom:14px}
.pt h3{font-size:1.15rem;margin-bottom:8px}
.sec-dark .pt{background:var(--panel-2,#1B2937);border-color:rgba(255,255,255,.14);color:var(--panel-text)}
.case-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:border-color .2s}
.case-card:hover{border-color:var(--accent)}
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:2px;background:var(--line)}
.cmp figure{margin:0;position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--surface-2)}
.cmp img{width:100%;height:100%;object-fit:cover}
.cmp figcaption{position:absolute;left:8px;top:8px;background:var(--panel);color:#fff;font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:2px}
.case-card .body{padding:18px 20px}
.case-card h3{font-size:1.02rem;margin-bottom:6px}
.case-card p{font-size:.88rem;color:var(--ink-soft);margin:0}
.case-card .meta{font-size:.8rem;color:var(--ink-faint);margin-top:8px}
.case-card.hidden{display:none}
.more-wrap{text-align:center;margin-top:32px}
.more-wrap button{cursor:pointer;font-family:inherit;font-size:1rem}
.rel-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.rel-card:hover{border-color:var(--accent)}
.rel-card .th{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.rel-card .th img{width:100%;height:100%;object-fit:cover}
.rel-card .body{padding:16px 18px}
.rel-card h3{font-size:1rem;margin-bottom:4px}
.rel-card p{font-size:.86rem;color:var(--ink-soft);margin:0}
/* tables */
.tbl{overflow-x:auto;margin:0 0 1.5em;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.tbl table{width:100%;border-collapse:collapse;min-width:0;font-size:.95rem}
.tbl th,.tbl td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{background:var(--surface-2);font-weight:700}
.tbl tr:last-child td{border-bottom:0}
/* faq */
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px}
.faq summary{list-style:none;cursor:pointer;padding:18px 52px 18px 22px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{font-size:1.02rem;font-weight:700;display:inline}
.faq summary::after{content:'+';position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:var(--accent)}
.faq details[open] summary::after{content:'\2212'}
.faq details p{padding:0 22px 20px;margin:0;color:var(--ink-soft)}
/* sub pages */
.page-hd{padding:clamp(40px,6vw,72px) 0 32px;border-bottom:1px solid var(--line)}
.crumb{font-size:.82rem;color:var(--ink-faint);margin-bottom:18px}
.crumb a:hover{color:var(--accent)}
.page-hd h1{font-size:clamp(1.9rem,4.4vw,3rem);margin-bottom:16px}
.answer{font-size:1.1rem;max-width:760px;color:var(--ink-soft);margin:0}
.article{max-width:820px;margin:0 auto}
.article section{margin-bottom:48px}
.article h2{font-size:clamp(1.35rem,2.6vw,1.75rem);margin-bottom:14px}
.article h3{font-size:1.1rem;margin:22px 0 8px}
.article .photo{margin:24px 0}
.article .photo img{border-radius:var(--radius);width:100%;max-width:420px;margin:0 auto}
.article .photo figcaption{text-align:center;font-size:.85rem;color:var(--ink-faint);margin-top:8px}
.ba{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:24px 0}
.ba figure{margin:0}
.ba img{border-radius:var(--radius);width:100%}
.ba figcaption{text-align:center;font-size:.85rem;color:var(--ink-faint);margin-top:8px}
.quote{border-left:3px solid var(--accent);padding:6px 0 6px 20px;color:var(--ink-soft)}
.quote cite{display:block;font-style:normal;font-size:.88rem;color:var(--ink-faint);margin-top:6px}
.modified{font-size:.85rem;color:var(--ink-faint);margin-top:28px}
.checks li{margin-bottom:6px}
/* consultation */
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;padding:18px 20px 18px 64px;position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px}
.steps li::before{content:counter(s);position:absolute;left:20px;top:16px;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;display:grid;place-items:center}
/* footer */
.ftr{background:var(--panel);color:var(--panel-muted);padding:56px 0 100px;font-size:.88rem}
.ftr a:hover{color:#fff}
.ftr .links{display:flex;flex-wrap:wrap;gap:8px 22px;margin-bottom:22px;color:var(--panel-text);font-weight:600}
.ftr address{font-style:normal;line-height:1.9}
.float{position:fixed;right:16px;bottom:16px;z-index:60}
.float .btn{box-shadow:none}
@media(max-width:860px){
  .hero .wrap{grid-template-columns:1fr}
  .hero-img{aspect-ratio:16/11;order:-1}
  .g3{grid-template-columns:1fr}.g2{grid-template-columns:1fr}
  .nav{display:none}
}
@media(max-width:600px){.tbl table{font-size:.84rem}.tbl th,.tbl td{padding:9px 10px}}

/* ---- 디자인 개선: 섹션/헤딩 구분, 카드, 모바일 버튼 ---- */
.sec-title{position:relative;padding-bottom:16px;margin-bottom:18px}
.sec-title::after{content:'';position:absolute;left:0;bottom:0;width:44px;height:3px;background:var(--accent)}
.sec-dark .sec-title::after{background:#E8A27F}
.sec[style*="center"] .sec-title::after,.sec-dark .wrap[style*="center"] .sec-title::after{left:50%;transform:translateX(-50%)}
.eyebrow{display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:'';width:24px;height:1px;background:currentColor}
.sec{border-top:1px solid var(--line)}
.sec-dark,.sec-alt,.sec-invert{border-top:0}
.pt{border-left:3px solid var(--accent)}
.sec-dark .pt{border-left-color:#E8A27F}
.pt h3{margin-bottom:8px}
.sym{margin-top:32px}
.sym-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:var(--radius);padding:24px;transition:border-color .2s,transform .2s}
.sym-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.sym-card h3{font-size:1.08rem;margin-bottom:10px}
.sym-card p{color:var(--ink-soft);font-size:.94rem;flex:1}
.more-link{font-weight:700;font-size:.88rem;color:var(--accent)}
.more-link::after{content:' \2192'}
.intro-box{margin-top:40px;padding:28px 30px;background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:var(--radius)}
.intro-box h3{font-size:1.1rem;margin-bottom:10px}
.intro-box p{margin:0;color:var(--ink-soft)}
/* 본문 헤딩 구분 */
.article section{padding-top:36px;border-top:1px solid var(--line);margin-bottom:12px}
.article section:first-child{border-top:0;padding-top:0}
.article h2{padding-left:14px;border-left:4px solid var(--accent)}
.article h3{color:var(--ink)}
.page-hd{background:var(--surface);border-bottom:1px solid var(--line)}
.page-hd h1{padding-bottom:16px;position:relative}
.page-hd h1::after{content:'';position:absolute;left:0;bottom:0;width:56px;height:4px;background:var(--accent)}
.hero h1::after{content:'';display:block;width:64px;height:4px;background:var(--accent);margin-top:18px}
.btn{text-align:center;min-height:48px;display:inline-flex;align-items:center;justify-content:center;transition:background .2s}
.steps li{padding-left:24px;border-left:4px solid var(--accent)}
.steps li::before{display:none}
.faq details[open]{border-color:var(--accent)}
.tbl th{border-bottom:2px solid var(--accent)}
@media(max-width:860px){
  .hero .cta,.page-hd .cta{flex-direction:column}
  .hero .cta .btn{width:100%}
  .page-hd div[style*="flex"]{flex-direction:column}
  .page-hd div[style*="flex"] .btn{width:100%}
  .more-wrap .btn{width:100%}
  .sec[style],.sec-dark .btn{max-width:100%}
  .sec-dark .wrap[style*="center"] .btn{width:100%}
  .float{left:12px;right:12px;bottom:12px}
  .float .btn{width:100%;min-height:52px;font-size:1rem}
  .hdr .btn{padding:8px 14px;min-height:40px;font-size:.85rem}
  .intro-box{padding:22px 20px}
  .sym-card{padding:20px}
}

/* 메인 사례: 좌 전/후 비교 + 우 정보 리스트형 */
.case-list{border-top:1px solid var(--line)}
.case-list .case-card{display:grid;grid-template-columns:minmax(280px,400px) 1fr;gap:clamp(20px,4vw,48px);align-items:center;background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:28px 0}
.case-list .case-card.hidden{display:none}
.case-list .cmp figure{aspect-ratio:4/5}
.case-list .case-card .body{padding:0}
.case-list .case-card h3{font-size:clamp(1.15rem,2.2vw,1.45rem);margin-bottom:10px}
.case-list .case-card:hover h3{color:var(--accent)}
.facts{margin:18px 0;display:grid;gap:0;border-top:1px solid var(--line)}
.facts div{display:flex;gap:16px;padding:9px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.facts dt{width:76px;flex:none;color:var(--ink-faint);font-weight:600}
.facts dd{margin:0}
@media(max-width:700px){.case-list .case-card{grid-template-columns:1fr;gap:18px;padding:22px 0}}

/* 모바일: 세로형 사진이 잘리지 않도록 */
@media(max-width:860px){
  .hero-img{aspect-ratio:auto;background:var(--surface-2);display:flex;justify-content:center}
  .hero-img img{width:auto;height:auto;max-width:100%;max-height:78vh;object-fit:contain}
  .case-list .cmp figure,.cmp figure{aspect-ratio:9/16}
}

/* 모바일: 위아래만 살짝 잘라 길이 줄임 */
@media(max-width:860px){
  .hero-img{aspect-ratio:3/4;display:block}
  .hero-img img{width:100%;height:100%;max-height:none;object-fit:cover;object-position:center 40%}
  .case-list .cmp figure,.cmp figure{aspect-ratio:2/3}
}