/* silfan.jibsa365.com — "Cool Ventilation" 디자인 (fan과 완전 분리: 쿨톤·라운드·소프트섀도우) */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');
@import url('https://fonts.googleapis.com/css2?family=Gmarket+Sans:wght@500;700&family=Outfit:wght@600;800&display=swap');
:root{
  --bg:#eef4f8; --panel:#ffffff; --fg:#0c2233; --dim:#5b7186; --soft:#f1f7fb;
  --brand:#0ea5b7; --brand2:#2563eb; --brand-d:#0b7c8a; --line:rgba(12,34,51,.10);
  --grad:linear-gradient(120deg,#0ea5b7,#2563eb); --grad-soft:linear-gradient(120deg,#e0f5f9,#e6efff);
  --shadow:0 10px 30px -12px rgba(12,60,90,.28); --shadow-lg:0 24px 60px -20px rgba(12,60,90,.35);
  --disp:"Gmarket Sans",sans-serif; --eng:"Outfit",sans-serif; --sans:"Pretendard",system-ui,sans-serif; --nav:72px; --r:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--fg);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
h1,h2{font-family:var(--disp);letter-spacing:-.02em;line-height:1.18}
/* nav */
header{position:fixed;top:0;left:0;right:0;height:var(--nav);z-index:900;background:rgba(238,244,248,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--nav)}
.brand{font-family:var(--disp);font-weight:700;font-size:1.15rem;color:var(--fg);display:flex;flex-direction:column;line-height:1.05}
.brand small{font-family:var(--eng);font-weight:600;font-size:.52rem;letter-spacing:.28em;color:var(--brand);margin-top:3px}
.navcall{background:var(--grad);color:#fff;padding:11px 20px;border-radius:100px;font-weight:700;font-size:.92rem;box-shadow:var(--shadow)}
.navcall:hover{filter:brightness(1.06);transform:translateY(-1px)}
/* hero */
.hero{padding:calc(var(--nav) + 64px) 22px 60px;max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-family:var(--eng);font-weight:600;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--brand-d);background:var(--soft);border:1px solid var(--line);padding:7px 15px;border-radius:100px;margin-bottom:20px}
.hero-l h1{font-size:clamp(2.1rem,5vw,3.5rem);margin-bottom:18px}
.hero-l .sub{color:var(--dim);font-size:1.08rem;max-width:520px;margin-bottom:30px}
.hbtns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:15px 28px;border-radius:100px;font-weight:700;font-size:1rem;transition:.2s;border:1.5px solid transparent}
.btn.solid{background:var(--grad);color:#fff;box-shadow:var(--shadow)}
.btn.solid:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn.ghost{background:var(--panel);color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--brand);color:var(--brand-d)}
.btn:active{transform:translateY(0)}
/* hero 이미지 — 라운드 모자이크 */
.hero-r{position:relative;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;gap:14px;aspect-ratio:1/.92}
.hero-r .m{overflow:hidden;border-radius:var(--r);box-shadow:var(--shadow);display:block}
.hero-r .m img{width:100%;height:100%;object-fit:cover;transition:.5s}
.hero-r .m:hover img{transform:scale(1.06)}
.hero-r .m1{grid-row:1/3;border-radius:calc(var(--r) + 4px)}
.hero-r .tag{position:absolute;right:12px;bottom:12px;background:rgba(12,34,51,.82);color:#fff;font-size:.74rem;font-weight:600;padding:7px 13px;border-radius:100px;backdrop-filter:blur(4px)}
/* trust */
.trust{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.tcell{padding:30px 18px;text-align:center;border-right:1px solid var(--line)}
.tcell:last-child{border-right:0}
.tcell b{display:block;font-family:var(--disp);font-weight:700;font-size:1.7rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.tcell span{display:block;color:var(--dim);font-size:.86rem;margin-top:5px}
/* sections */
.pad{padding:clamp(58px,8vw,104px) 0}
.divide{border-top:1px solid var(--line)}
.shead{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:38px;flex-wrap:wrap}
.k{font-family:var(--eng);font-weight:600;font-size:.72rem;letter-spacing:.22em;color:var(--brand);margin-bottom:10px}
.shead h2{font-size:clamp(1.5rem,3.2vw,2.25rem)}
.crumb{font-family:var(--eng);font-size:.74rem;letter-spacing:.14em;color:var(--dim);margin-bottom:14px}
/* chips */
.chips{display:flex;flex-wrap:wrap;gap:11px}
.chips a{background:var(--panel);border:1px solid var(--line);padding:11px 18px;border-radius:100px;font-weight:600;font-size:.92rem;color:var(--fg);transition:.18s;box-shadow:0 2px 8px -4px rgba(12,60,90,.2)}
.chips a:hover{background:var(--grad);color:#fff;border-color:transparent;transform:translateY(-2px)}
/* collage */
.collage{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.ccard{position:relative;overflow:hidden;border-radius:var(--r);aspect-ratio:4/3;box-shadow:var(--shadow);opacity:0;transform:translateY(24px);transition:.6s}
.ccard.on{opacity:1;transform:none}
.ccard img{width:100%;height:100%;object-fit:cover;transition:.5s}
.ccard:hover img{transform:scale(1.07)}
.ccard .cap{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 12px;background:linear-gradient(transparent,rgba(8,25,40,.82));color:#fff;font-size:.82rem;font-weight:600}
/* prose */
.prose{font-size:1.02rem}
.prose .lead{font-size:1.18rem;color:var(--fg);font-weight:600;margin-bottom:26px;padding:22px 26px;background:var(--grad-soft);border-radius:var(--r);border-left:4px solid var(--brand)}
.prose .body h2{font-size:1.3rem;margin:34px 0 12px;color:var(--fg)}
.prose .body p,.prose .body li{color:var(--dim)}
.prose .body ul{margin:14px 0;padding-left:4px;list-style:none}
.prose .body li{padding:9px 0 9px 30px;position:relative;border-bottom:1px solid var(--soft)}
.prose .body li::before{content:"❄";position:absolute;left:2px;top:9px;color:var(--brand)}
.prose .body strong{color:var(--fg)}
/* reviews */
.reviews-g{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rev{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:28px 24px;box-shadow:var(--shadow);position:relative}
.rev .q{font-family:var(--eng);font-size:3rem;line-height:.6;color:var(--brand);opacity:.28}
.rev .stars{color:#f5b301;letter-spacing:2px;margin:8px 0}
.rev p{color:var(--dim);font-size:.96rem}
.rev .who{margin-top:16px;font-size:.86rem;color:var(--fg)}
.rev .who b{color:var(--brand-d)}
/* faq */
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;padding:4px 22px;box-shadow:0 4px 14px -8px rgba(12,60,90,.22)}
.faq summary{font-weight:700;cursor:pointer;padding:16px 0;list-style:none;position:relative}
.faq summary::after{content:"+";position:absolute;right:2px;color:var(--brand);font-size:1.5rem;font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--dim);padding:0 0 16px}
/* final CTA */
.final{background:var(--grad);color:#fff;text-align:center;border-radius:0}
.final h2{font-size:clamp(1.7rem,4vw,2.6rem);color:#fff;margin-bottom:14px}
.final p{opacity:.92;margin-bottom:26px}
.final .btn.solid{background:#fff;color:var(--brand-d);box-shadow:var(--shadow-lg)}
.final .btn.solid:hover{background:#fff}
/* footer */
footer{background:#0c2233;color:#cfe1ee;padding:56px 0 90px}
.fbrand{font-family:var(--disp);font-weight:700;font-size:1.3rem;color:#fff;margin-bottom:14px}
.fbiz{font-size:.9rem;line-height:1.9;color:#9db6c9}
/* mobile call bar */
.mcall{position:fixed;left:0;right:0;bottom:0;z-index:800;display:none;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}
.mcall a{padding:16px;text-align:center;font-weight:700;font-size:.98rem}
.mcall .c1{background:var(--grad);color:#fff}
.mcall .c2{background:var(--panel);color:var(--brand-d)}
@media(max-width:860px){
  .hero{grid-template-columns:1fr;gap:32px;padding-top:calc(var(--nav) + 40px)}
  .hero-r{aspect-ratio:1/.7;max-width:520px}
  .trust .wrap{grid-template-columns:repeat(2,1fr)}
  .tcell:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .tcell:nth-child(even){border-right:0}
  .collage,.reviews-g{grid-template-columns:1fr 1fr}
  .mcall{display:grid}
  footer{padding-bottom:90px}
}
@media(max-width:520px){.collage,.reviews-g{grid-template-columns:1fr}}

/* ===== AEO answer box ===== */
.aeo-wrap{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.aeo-wrap .wrap{padding:clamp(30px,5vw,52px) 0}
.aeo{background:var(--grad-soft);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--r);padding:26px 28px;box-shadow:var(--shadow)}
.aeo-q{font-weight:800;color:var(--brand-d);font-size:1.06rem;margin-bottom:10px}
.aeo-a{color:var(--fg);font-size:1.02rem;line-height:1.85}
.aeo-a strong{color:var(--brand-d)}
.aeo-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.aeo-tags span{background:#fff;border:1px solid var(--line);color:var(--brand-d);font-size:.8rem;font-weight:700;padding:6px 12px;border-radius:100px}
/* ===== process steps ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;box-shadow:0 4px 14px -8px rgba(12,60,90,.22)}
.snum{font-family:var(--eng);font-weight:700;font-size:1.5rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:10px}
.step h3{font-size:1.02rem;margin-bottom:8px}
.step p{color:var(--dim);font-size:.9rem;line-height:1.7}
/* ===== cost table ===== */
.ctable-wrap{overflow-x:auto}
.ctable{width:100%;border-collapse:collapse;font-size:.96rem;min-width:520px;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.ctable th{background:var(--grad);color:#fff;text-align:left;padding:14px 18px;font-weight:700}
.ctable td{padding:14px 18px;border-bottom:1px solid var(--line);color:var(--dim);background:#fff}
.ctable tbody tr:nth-child(even) td{background:var(--panel)}
.ctable td:first-child{color:var(--fg);font-weight:600}
.ctnote{margin-top:14px;color:var(--dim);font-size:.88rem}
/* ===== 바둑판 carousel ===== */
.carnav{display:flex;gap:8px}
.cbtn{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:var(--panel);color:var(--brand-d);font-size:1.4rem;line-height:1;cursor:pointer;transition:.18s;box-shadow:var(--shadow)}
.cbtn:hover{background:var(--grad);color:#fff;border-color:transparent}
.carousel{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:4px 2px 20px;-webkit-overflow-scrolling:touch}
.carousel::-webkit-scrollbar{height:8px}
.carousel::-webkit-scrollbar-thumb{background:var(--line);border-radius:100px}
.cslide{position:relative;flex:0 0 min(560px,86%);scroll-snap-align:center}
.cgrid{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;gap:8px;aspect-ratio:1/1;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.cgrid a{display:block;overflow:hidden}
.cgrid img{width:100%;height:100%;object-fit:cover;transition:.5s}
.cgrid a:hover img{transform:scale(1.08)}
.cslabel{position:absolute;left:14px;bottom:16px;background:rgba(12,34,51,.86);color:#fff;font-size:.8rem;font-weight:600;padding:7px 14px;border-radius:100px;backdrop-filter:blur(4px)}
@media(max-width:860px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.steps{grid-template-columns:1fr}.cslide{flex:0 0 88%}}