/* KS시스템에어컨 — 공통 스타일 */
:root{
  --primary:#1a5fd6;
  --primary-dark:#12459e;
  --primary-light:#e8f0fd;
  --navy:#0f1f3d;
  --text:#1f2a3d;
  --muted:#5b6778;
  --line:#e3e8f0;
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --radius:14px;
  --shadow:0 6px 24px rgba(15,31,61,.08);
}
*{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(--bg);line-height:1.65;font-size:16px;word-break:keep-all}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
h1,h2,h3{line-height:1.3;color:var(--navy);font-weight:700}
h1{font-size:clamp(1.9rem,4.5vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.25rem}
.container{width:min(1140px,100% - 32px);margin:0 auto}
section{padding:72px 0}
.section-head{margin-bottom:36px}
.section-head .eyebrow{color:var(--primary);font-weight:700;font-size:.9rem;letter-spacing:.04em;margin-bottom:8px}
.section-head p.lead{color:var(--muted);margin-top:10px;max-width:640px}
.soft{background:var(--bg-soft)}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
.mt{margin-top:28px}
.nb{white-space:nowrap}

/* 버튼 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;border-radius:10px;font-weight:700;font-size:1rem;border:2px solid transparent;cursor:pointer;transition:.18s;font-family:inherit}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{border-color:var(--primary);color:var(--primary);background:#fff}
.btn-outline:hover{background:var(--primary-light)}
.btn-kakao{background:#fee500;color:#191919}
.btn-kakao:hover{background:#f5dc00}
.btn-lg{padding:17px 32px;font-size:1.08rem}
.btn-block{width:100%}

/* 헤더 */
.top-bar{background:var(--navy);color:#cfd8e8;font-size:.85rem}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;height:36px}
.top-bar strong{color:#fff}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.site .container{display:flex;align-items:center;justify-content:space-between;height:72px;position:relative}
.logo{display:flex;align-items:center;gap:11px;color:#101d3d;--brand-blue:#4ea1ff}
.logo .brand-mark{width:42px;height:42px;flex:0 0 42px;display:block}
.logo .brand-text{display:flex;flex-direction:column;line-height:1.05}
.logo .brand-text b{font-weight:900;font-size:1.32rem;letter-spacing:-.03em;white-space:nowrap}
.logo .brand-text b span{font-weight:800;font-size:.98rem;letter-spacing:0;margin-left:5px}
.logo small{display:block;font-size:.7rem;font-weight:500;color:var(--muted);margin-top:4px}
.foot-brand{display:flex;align-items:center;gap:8px;--brand-blue:#4ea1ff}
.foot-brand .brand-mark{width:24px;height:24px;color:#fff}
nav.main ul{display:flex;gap:28px}
nav.main a{font-weight:600;color:var(--text);padding:8px 0;border-bottom:2px solid transparent}
nav.main a:hover,nav.main a.active{color:var(--primary);border-color:var(--primary)}
.header-cta{display:flex;gap:12px;align-items:center}
.header-cta .tel{font-weight:800;font-size:1.15rem;color:var(--navy)}
.header-cta .btn{padding:10px 18px;font-size:.92rem}
.menu-toggle{display:none;background:none;border:0;font-size:1.7rem;cursor:pointer;color:var(--navy)}

/* 히어로 */
.hero{background:linear-gradient(135deg,#eef4ff 0%,#f9fbff 55%,#e6f3ff 100%);padding:80px 0 70px;position:relative;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .badge{display:inline-flex;gap:8px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:.85rem;font-weight:600;color:var(--primary-dark);margin-bottom:20px}
.hero h1{margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero p.sub{font-size:1.1rem;color:var(--muted);margin-bottom:28px;max-width:560px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap}
.hero .visual{background:#fff;border-radius:20px;box-shadow:var(--shadow);padding:24px;border:1px solid var(--line)}
.hero .visual .photo{aspect-ratio:4/3;border-radius:12px;overflow:hidden;background:linear-gradient(160deg,#e3ecfb,#c9d9f6);position:relative}
.hero .visual .photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero .visual .photo svg{position:absolute;inset:0;width:100%;height:100%}
.hero-points{margin-top:20px;display:grid;gap:10px}
.hero-points li{display:flex;gap:10px;align-items:flex-start;font-size:.95rem}
.hero-points li::before{content:"✓";color:var(--primary);font-weight:900}

/* 신뢰 띠 */
.trust-band{background:var(--navy);color:#fff;padding:26px 0}
.trust-band ul{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}
.trust-band strong{display:block;font-size:1.3rem;color:#fff}
.trust-band span{font-size:.88rem;color:#b8c4d9}

/* 카드 그리드 */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.card:has(.icon){display:grid;grid-template-columns:auto 1fr;column-gap:12px;align-items:start}
.card .icon{font-size:1.45rem;line-height:1.3;margin:0;grid-column:1;grid-row:1}
.card:has(.icon)>h3{grid-column:2;grid-row:1}
.card:has(.icon)>p{grid-column:2;grid-row:2}
.card:has(.icon)>.more{grid-column:2;grid-row:3}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);font-size:.95rem}
.card.link{transition:.18s}
.card.link:hover{border-color:var(--primary);transform:translateY(-3px)}
.card .more{display:inline-block;margin-top:12px;color:var(--primary);font-weight:700;font-size:.9rem}

/* 계산기 */
.calc{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.calc .calc-body{display:grid;grid-template-columns:1.1fr .9fr}
.calc .fields{padding:32px;display:grid;gap:18px}
.calc label{display:block;font-weight:700;font-size:.92rem;margin-bottom:6px}
.calc select{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:1rem;background:#fff;font-family:inherit}
.calc select:focus{outline:none;border-color:var(--primary)}
.calc .result{background:var(--primary-light);padding:32px;display:flex;flex-direction:column;justify-content:center}
.calc .result .label{font-size:.9rem;color:var(--muted)}
.calc .breakdown{display:grid;gap:6px;margin:10px 0 12px;font-size:.9rem}
.calc .breakdown li{display:flex;justify-content:space-between;gap:12px;align-items:baseline;border-bottom:1px dashed #c9d8f2;padding-bottom:6px}
.calc .breakdown li span{color:var(--muted)}
.calc .breakdown li b{color:var(--navy);font-weight:800;white-space:nowrap}
.calc .result .price{font-size:2.6rem;font-weight:900;color:var(--primary-dark);margin:6px 0 4px}
.calc .result .price small{font-size:1.1rem;font-weight:700}
.calc .result .note{font-size:.85rem;color:var(--muted);margin-bottom:16px}
.calc .result .includes{font-size:.88rem;margin-bottom:18px;display:grid;gap:4px}
.calc .result .includes li::before{content:"· "}
.calc .fine{padding:14px 32px;background:#fffbf3;border-top:1px solid #f4e3c4;font-size:.85rem;color:#7a5a1e}

/* 프로세스 */
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.process li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px}
.process li .num{width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:12px}
.process li h3{font-size:1.02rem;margin-bottom:6px}
.process li p{font-size:.88rem;color:var(--muted)}

/* 시공사례 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.case .thumb{aspect-ratio:4/3;background:linear-gradient(160deg,#dfe9fb,#c4d6f5);display:grid;place-items:center;color:#4a6aa8;font-size:.85rem;font-weight:600;position:relative}
.case .thumb img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.case .body{padding:18px 20px}
.case .tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.tag{font-size:.75rem;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--primary-light);color:var(--primary-dark)}
.tag.brand-samsung{background:#e8effa;color:#1428a0}
.tag.brand-lg{background:#fde7ec;color:#a50034}
.tag.type-com{background:#fff1e6;color:#b25400}
.case h3{font-size:1.02rem;margin-bottom:6px}
.case .meta{font-size:.86rem;color:var(--muted)}
.filter-group{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:12px}
.filter-group .lbl{font-size:.85rem;font-weight:700;color:var(--muted);min-width:56px}
.filter-group button{padding:8px 15px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-weight:600;cursor:pointer;font-family:inherit;font-size:.88rem}
.filter-group button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.empty{padding:40px;text-align:center;color:var(--muted);display:none}

/* 인증 */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cert{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-align:center}
.cert .frame{aspect-ratio:3/4;background:linear-gradient(180deg,#f8fafc,#eef2f8);border:1px dashed #c9d3e3;border-radius:8px;display:grid;place-items:center;color:var(--muted);font-size:.82rem;margin-bottom:12px;padding:10px;position:relative;overflow:hidden}
.cert .frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#fff}
.cert strong{display:block;font-size:.95rem}
.cert span{font-size:.82rem;color:var(--muted)}

/* 후기 */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.review .stars{color:#f5a623;letter-spacing:2px;margin-bottom:10px}
.review p{font-size:.95rem;margin-bottom:12px}
.review .who{font-size:.85rem;color:var(--muted);font-weight:600;line-height:1.5}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 22px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;padding:18px 0;list-style:none;display:flex;justify-content:space-between;gap:12px;font-size:1.02rem;color:var(--navy)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--primary);font-size:1.3rem;font-weight:400;flex-shrink:0}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 18px;color:var(--text);font-size:.96rem}
.faq .a p+p{margin-top:8px}
.faq h2{margin:30px 0 12px;font-size:1.35rem;color:var(--primary-dark)}

/* 가격표 */
.table-wrap{overflow-x:auto}

/* 약관·처리방침 같은 긴 법적 문서 */
.legal{max-width:760px}
.legal h2{font-size:1.3rem;margin:38px 0 12px;padding-top:18px;border-top:1px solid var(--line)}
.legal h2:first-of-type{margin-top:0;padding-top:0;border-top:0}
.legal p{margin-bottom:12px;color:var(--text)}
.legal .fine{font-size:.86rem;color:var(--muted)}
.legal .table-wrap{margin:14px 0 18px}
.legal .price-table th,.legal .price-table td{text-align:left;font-size:.9rem;padding:12px}
.legal .check-list{margin:10px 0 16px}
.legal .info-box{margin:18px 0}
.price-table{width:100%;border-collapse:collapse;background:#fff;box-shadow:var(--shadow);min-width:640px}
.price-table th,.price-table td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:center;font-size:.95rem}
.price-table thead th{background:var(--navy);color:#fff;font-weight:700}
.price-table tbody th{background:var(--bg-soft);color:var(--navy)}
.price-table td strong{color:var(--primary-dark);font-size:1.05rem}
.options-table{width:100%;border-collapse:collapse;background:#fff}
.options-table th,.options-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:.94rem}
.options-table th{background:var(--bg-soft);font-weight:700}
.notice{background:#fffbf3;border:1px solid #f4e3c4;border-radius:12px;padding:18px 22px;font-size:.93rem;color:#5c4512}
.notice strong{color:#7a5a1e}
.info-box{background:var(--primary-light);border-radius:12px;padding:20px 24px;font-size:.95rem}
.info-box strong{color:var(--primary-dark)}

/* 문의 폼 */
.contact-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:32px;align-items:start}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
.form-grid label{display:block;font-weight:700;font-size:.9rem;margin-bottom:6px}
.form-grid input,.form-grid select,.form-grid textarea{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:1rem;font-family:inherit;background:#fff}
.form-grid input:focus,.form-grid select:focus,.form-grid textarea:focus{outline:none;border-color:var(--primary)}
.form-grid textarea{min-height:120px;resize:vertical}
.agree{font-size:.88rem;color:var(--muted);display:flex;gap:8px;align-items:flex-start}
.agree input{width:auto;margin-top:4px}
.form-msg{margin-top:14px;font-size:.92rem;font-weight:600;display:none}
.form-msg.ok{display:block;color:#137a3a}
.form-msg.err{display:block;color:#b42323}
.contact-side{display:grid;gap:14px}
.contact-side .card{padding:22px}
.contact-side .card strong{display:block;font-size:1.25rem;color:var(--navy);margin-bottom:4px}
.contact-side .card p{font-size:.9rem}

/* CTA 밴드 */
.cta-band{background:linear-gradient(120deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;padding:64px 0;text-align:center}
.cta-band h2{color:#fff;margin-bottom:12px}
.cta-band p{color:#dce6fb;margin-bottom:26px}
.cta-band .actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.cta-band .btn-outline{border-color:#fff;color:#fff;background:transparent}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.12)}

/* 서브페이지 헤더 */
.page-head{background:linear-gradient(135deg,#eef4ff,#f9fbff);padding:56px 0 44px;border-bottom:1px solid var(--line)}
.page-head .crumb{font-size:.85rem;color:var(--muted);margin-bottom:10px}
.page-head .crumb a:hover{color:var(--primary)}
.page-head p{color:var(--muted);margin-top:10px;max-width:700px}

/* 회사소개 */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.about-grid .visual{background:linear-gradient(160deg,#dfe9fb,#c4d6f5);border-radius:20px;aspect-ratio:4/3;display:grid;place-items:center;color:#4a6aa8;font-weight:600;position:relative;overflow:hidden}
.about-grid .visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.about-grid p+p{margin-top:12px}
.check-list li{display:flex;gap:10px;margin-bottom:10px}
.check-list li::before{content:"✓";color:var(--primary);font-weight:900;flex-shrink:0}
.region-list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.region-list li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:.92rem;font-weight:600}
.region-list li.no{color:#6b7585;text-decoration:line-through;font-weight:500}

/* 푸터 */
footer.site{background:#0b1730;color:#a9b6cc;padding:56px 0 110px;font-size:.88rem}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:32px}
footer.site h3{color:#fff;font-size:1rem;margin-bottom:12px}
footer.site li{margin-bottom:6px}
footer.site a:hover{color:#fff}
footer.site .copy{border-top:1px solid #1f2d4a;padding-top:18px;font-size:.8rem;color:#7d8ba3}
footer.site .biz{line-height:1.8}

/* 플로팅 / 모바일 바 */
.float-kakao{position:fixed;right:22px;bottom:24px;z-index:60;width:60px;height:60px;border-radius:50%;background:#fee500;display:grid;place-items:center;box-shadow:0 8px 20px rgba(0,0,0,.18);font-weight:900;color:#191919;font-size:.72rem;text-align:center;line-height:1.1}
.mobile-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(0,0,0,.08)}
.mobile-bar a{flex:1;text-align:center;padding:14px 0;font-weight:800;font-size:.95rem}
.mobile-bar .tel{background:var(--primary);color:#fff}
.mobile-bar .kakao{background:#fee500;color:#191919}
.mobile-bar .quote{background:var(--navy);color:#fff}

/* 반응형 */
@media (max-width:980px){
  .hero .container{grid-template-columns:1fr}
  .grid-4,.cert-grid{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .calc .calc-body{grid-template-columns:1fr}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  footer.site .cols{grid-template-columns:1fr 1fr}
  nav.main ul{gap:18px}
}
@media (max-width:720px){
  section{padding:52px 0}
  .top-bar{display:none}
  nav.main{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;border-bottom:1px solid var(--line);padding:6px 4% 10px;box-shadow:var(--shadow)}
  nav.main.open{display:block}
  nav.main ul{flex-direction:column;gap:0}
  nav.main a{display:block;padding:14px 0;border-bottom:1px solid var(--line)}
  .header-cta{display:none}
  .menu-toggle{display:block}
  .grid-2,.grid-3,.grid-4,.cert-grid,.case-grid,.process,.form-grid,.region-list{grid-template-columns:1fr}
  .trust-band ul{grid-template-columns:repeat(2,1fr)}
  .hero{padding:48px 0 40px}
  .hero .actions .btn{flex:1}
  .mobile-bar{display:flex}
  .float-kakao{display:none}
  footer.site .cols{grid-template-columns:1fr}
  .calc .result .price{font-size:2.1rem}
}