/* 디지털HP(dhp4u.com) 공통 스타일 — 브랜드 가이드 3-7 기준 */
:root{
  --navy:#1B365D; --orange:#F2842B; --gray:#5B6770; --bg:#F7F8FA;
  --line:#E3E7EC; --text:#1F2937; --white:#fff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Malgun Gothic","Apple SD Gothic Neo",sans-serif;color:var(--text);background:var(--white);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* header */
.top{border-bottom:1px solid var(--line);background:var(--white);position:sticky;top:0;z-index:10}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:900;font-size:24px;letter-spacing:-.5px}
.logo .a{color:var(--navy)}.logo .b{color:var(--orange)}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--gray);letter-spacing:0;margin-top:-4px}
.nav{display:flex;gap:22px;font-size:15px;font-weight:600;color:var(--navy)}
.nav a:hover{color:var(--orange)}
.tel{background:var(--orange);color:#fff;padding:9px 16px;border-radius:8px;font-weight:700;white-space:nowrap}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:14px}
@media(max-width:820px){
  .nav{display:none;position:absolute;left:0;right:0;top:64px;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
  .nav a{padding:14px 20px;border-top:1px solid var(--line)}
  .menu-btn{display:block}
  .tel{padding:8px 12px;font-size:14px}
}

/* hero */
.hero{background:var(--navy);color:#fff;padding:64px 0 56px}
.hero h1{font-size:34px;line-height:1.3;font-weight:800;margin-bottom:14px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero p{font-size:17px;opacity:.9;max-width:640px}
.hero .cta{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 22px;border-radius:8px;font-weight:700;font-size:15px}
.btn-o{background:var(--orange);color:#fff}
.btn-w{background:#fff;color:var(--navy)}
.btn-n{background:var(--navy);color:#fff}
@media(max-width:600px){.hero h1{font-size:26px}}

/* proof strip */
.proof{background:var(--bg);border-bottom:1px solid var(--line)}
.proof .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.proof div{padding:22px 10px;text-align:center;border-right:1px solid var(--line)}
.proof div:last-child{border-right:0}
.proof b{display:block;font-size:26px;color:var(--navy);font-weight:800}
.proof span{font-size:13px;color:var(--gray)}
@media(max-width:700px){.proof .wrap{grid-template-columns:repeat(2,1fr)}.proof div:nth-child(2){border-right:0}}

/* sections */
section{padding:56px 0}
section.alt{background:var(--bg)}
h2{font-size:26px;color:var(--navy);font-weight:800;margin-bottom:8px}
.sub{color:var(--gray);margin-bottom:28px}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:820px){.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g3,.g2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;transition:.15s}
.card:hover{border-color:var(--orange);transform:translateY(-2px)}
.card h3{font-size:18px;color:var(--navy);margin-bottom:6px}
.card p{font-size:14.5px;color:var(--gray)}
.card .more{display:inline-block;margin-top:12px;color:var(--orange);font-weight:700;font-size:14px}

/* case list */
.case{display:grid;grid-template-columns:160px 1fr;gap:18px;align-items:start}
.case .thumb{background:var(--line);border-radius:8px;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;color:var(--gray);font-size:12px}
.case .meta{font-size:13px;color:var(--gray);margin-bottom:4px}
.case h3{font-size:17px}
@media(max-width:560px){.case{grid-template-columns:1fr}}

/* article (설치사례) */
.article{max-width:820px;margin:0 auto;padding:48px 20px}
.article .crumb{font-size:13px;color:var(--gray);margin-bottom:16px}
.article h1{font-size:28px;line-height:1.35;color:var(--navy);font-weight:800;margin-bottom:10px}
.article .lead{font-size:17px;color:var(--gray);margin-bottom:24px;border-left:4px solid var(--orange);padding-left:14px}
.article h2{font-size:21px;margin:36px 0 12px}
.article p{margin-bottom:14px}
.article ul{margin:0 0 14px 20px}
.info{width:100%;border-collapse:collapse;margin:18px 0 26px;font-size:15px}
.info th,.info td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.info th{background:var(--bg);width:30%;color:var(--navy);font-weight:700}
.photos{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0}
.photos figure{margin:0}
.photos .ph{background:var(--line);aspect-ratio:4/3;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--gray);font-size:13px}
.photos figcaption{font-size:13px;color:var(--gray);margin-top:6px}
@media(max-width:560px){.photos{grid-template-columns:1fr}}
.faq details{border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin-bottom:8px;background:#fff}
.faq summary{font-weight:700;color:var(--navy);cursor:pointer}
.faq p{margin:10px 0 0;font-size:15px}
.ctabox{background:var(--navy);color:#fff;border-radius:12px;padding:26px;margin:32px 0;text-align:center}
.ctabox b{display:block;font-size:20px;margin-bottom:6px}
.ctabox p{opacity:.9;margin-bottom:14px;font-size:15px}
.related{margin-top:36px}
.related a{display:block;padding:12px 0;border-top:1px solid var(--line);font-weight:600;color:var(--navy)}
.related a:hover{color:var(--orange)}
.notice{background:#FFF4E8;border:1px solid #F9CFA8;border-radius:8px;padding:12px 14px;font-size:14px;color:#8A4A10;margin-bottom:20px}

/* footer */
footer{background:#111827;color:#9CA3AF;padding:40px 0;font-size:13.5px;line-height:1.9}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr;gap:32px}
footer b{color:#fff;display:block;font-size:15px;margin-bottom:6px}
footer a{color:#D1D5DB}
@media(max-width:700px){footer .wrap{grid-template-columns:1fr}}
.sticky-call{display:none}
@media(max-width:820px){
  .sticky-call{display:block;position:fixed;left:0;right:0;bottom:0;background:var(--orange);color:#fff;text-align:center;padding:14px;font-weight:800;font-size:17px;z-index:20}
  body{padding-bottom:56px}
}

/* 실제 사진 (2026-10-10 추가) */
.case img.thumb{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;background:var(--line)}
.photos img{width:100%;height:auto;border-radius:8px;background:var(--line)}
.article ol{margin:0 0 14px 22px}
.article ol li{margin-bottom:6px}