:root{
  --dark:#211C17;
  --dark-2:#2D251E;
  --ink:#2A231C;
  --accent:#E8590C;
  --accent-2:#C44907;
  --line:#E8E0D2;
  --bg-alt:#F6F1E7;
  --muted:#7A6F60;
  --radius:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Pretendard","Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  color:var(--ink);
  background:#fff;
  line-height:1.6;
  word-break:keep-all;
  overflow-wrap:break-word;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.3;margin:0 0 .5em}
.accent{color:var(--accent)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--dark)}
.brand .mark{width:24px;height:24px}
.brand small{font-weight:600;font-size:.6rem;color:var(--muted);letter-spacing:.04em;margin-left:4px}
.main-nav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0}
.main-nav a{font-weight:600;font-size:.92rem;color:var(--ink)}
.main-nav a.active,.main-nav a:hover{color:var(--accent)}
.header-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:32px;height:32px;border:0;background:none;cursor:pointer}
.nav-toggle span{display:block;width:100%;height:2px;background:var(--dark)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:11px 20px;border-radius:8px;font-weight:700;font-size:.9rem;white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff}
.btn-outline{border:1.5px solid var(--dark);color:var(--dark)}
.btn:hover{opacity:.85}

/* hero */
.hero{background:linear-gradient(100deg,rgba(18,14,10,.94) 0%,rgba(18,14,10,.8) 48%,rgba(18,14,10,.5) 100%),url('../assets/image/images/rooftop-channel-cleaning-kis-01.webp') center/cover no-repeat;color:#fff}
.hero .wrap{padding-top:88px;padding-bottom:88px}
.hero-copy{max-width:660px;margin:0 auto;text-align:center;animation:hero-reveal 1.6s ease both}
@keyframes hero-reveal{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}
@media (prefers-reduced-motion:reduce){.hero-copy{animation:none}}
.eyebrow-line{display:flex;align-items:center;justify-content:center;gap:8px;font-size:.82rem;color:#FFB27A;font-weight:700;margin-bottom:14px;letter-spacing:.02em}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--accent);animation:pulse-blink 1.6s ease-in-out infinite}
@keyframes pulse-blink{0%,100%{opacity:1}50%{opacity:.2}}
@media (prefers-reduced-motion:reduce){.pulse{animation:none}}
.hero h1{font-family:"Black Han Sans",sans-serif;font-size:3.1rem;font-weight:400;letter-spacing:-.01em;text-shadow:0 3px 18px rgba(0,0,0,.6)}
.hero-sub{color:#E4DCCF;font-size:1.02rem;max-width:56ch;margin-left:auto;margin-right:auto;text-shadow:0 1px 8px rgba(0,0,0,.5)}
.br-mobile{display:none}
.hero-cta{display:flex;justify-content:center;gap:12px;margin:22px 0}
.hero .hero-cta .btn{border-radius:var(--radius)}
.hero .hero-cta .btn-outline{border-color:#fff;color:#fff}
.hero-stats{display:flex;justify-content:center;gap:28px;margin-top:24px;flex-wrap:wrap;text-align:left}
.hero-stats strong{display:block;color:var(--accent);font-size:1.15rem}
.hero-stats span{display:block;color:#B9AE9E;font-size:.8rem;margin-top:2px}

/* section shared */
section{padding:72px 0}
.alt-bg{background:var(--bg-alt)}
.section-head{max-width:640px;margin:0 auto 40px;text-align:center}
.section-tag{display:inline-block;font-size:.75rem;font-weight:800;color:var(--accent);letter-spacing:.08em;margin-bottom:10px}
.section-head h2{font-size:1.7rem}
.section-head p{color:var(--muted);margin:0}
.prose{max-width:760px;margin:0 auto;color:var(--ink)}
.prose p{margin:0 0 1.1em}
.prose ul{margin:0;padding-left:1.2em}
.prose li{margin-bottom:.7em;line-height:1.55}
.prose li:last-child{margin-bottom:0}

/* intro media */
.intro-shots{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:36px}
.intro-shots img{width:100%;height:100%;min-width:0;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line)}
.intro-shot-single{margin-bottom:36px}
.intro-shot-single img{width:100%;aspect-ratio:21/9;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line)}

/* tables */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
table.service-table{width:100%;border-collapse:collapse;min-width:640px;font-size:.92rem}
.service-table th{background:var(--dark);color:#fff;text-align:left;padding:14px 16px;font-size:.82rem}
.service-table td{padding:14px 16px;border-top:1px solid var(--line);vertical-align:top}
.service-table td.tag{font-weight:800;color:var(--accent);white-space:nowrap}
.service-table td.field{font-weight:700}
.service-table td.desc{color:var(--muted)}

/* process */
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.process-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;text-align:center}
.process-num{font-size:1.3rem;font-weight:800;color:var(--accent);margin-bottom:8px}
.process-step h3{font-size:1rem;margin-bottom:6px}
.process-step p{font-size:.82rem;color:var(--muted);margin:0}

/* why */
.reason-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.reason-cell{padding:22px 4px}
.checkmark{width:26px;height:26px;border-radius:50%;background:var(--dark);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.85rem;margin-bottom:14px}
.reason-cell h3{font-size:1.02rem}
.reason-cell p{font-size:.86rem;color:var(--muted);margin:0}

/* scroll reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .55s ease,transform .55s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* reference gallery */
.ref-strip{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.ref-chip{background:#FBE4D3;border:1px solid #F0B98C;border-radius:999px;padding:8px 16px;font-size:.82rem;font-weight:700;color:var(--accent-2)}
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery-grid figure{margin:0;border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line);position:relative}
.gallery-grid img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:transform .5s ease}
.gallery-grid figure:hover img{transform:scale(1.05)}
.gallery-grid figcaption{padding:10px 12px;font-size:.8rem;color:var(--muted);font-weight:600}

/* faq */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item.faq-hidden{display:none}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:18px 4px;font-size:.98rem;font-weight:700;display:flex;justify-content:space-between;align-items:center;cursor:pointer;color:var(--ink)}
.faq-q .plus{color:var(--accent);font-weight:800;transition:transform .2s}
.faq-a{display:none;padding:0 4px 18px;color:var(--muted);font-size:.9rem}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
#faq-more-btn{display:block;margin:26px auto 0}

/* cta */
#cta .cta-banner{display:flex;justify-content:space-between;align-items:center;gap:24px;background:var(--dark);color:#fff;border-radius:16px;padding:40px}
.cta-banner h2{font-size:1.4rem;margin-bottom:6px}
.cta-banner p{color:#C9BFAF;margin:0}
.cta-banner .actions{display:flex;gap:12px;flex-shrink:0}
.cta-banner .btn-outline{border-color:#fff;color:#fff}

/* footer */
.site-footer{background:var(--dark);color:#C9BFAF;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding-bottom:32px;border-bottom:1px solid #3D342A}
.footer-brand .brand{color:#fff}
.footer-brand p{margin-top:12px;font-size:.86rem;max-width:36ch}
.footer-col h4{color:#fff;font-size:.78rem;letter-spacing:.06em;margin-bottom:14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;font-size:.86rem}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding-top:20px;font-size:.78rem;color:#8F836F}

@media (max-width:860px){
  .hero{background-position:center 35%}
  .hero .wrap{padding-top:40px;padding-bottom:40px}
  .hero h1{font-size:2.5rem}
  .hero-cta{gap:10px;flex-wrap:nowrap}
  .hero-cta .btn{padding:13px 18px;font-size:.88rem;flex:1 1 0;justify-content:center}
  .br-mobile{display:inline}
  .hero-stats{gap:8px;flex-wrap:nowrap;text-align:center}
  .hero-stats>div{flex:1 1 0;min-width:0}
  .hero-stats strong{font-size:.95rem}
  .hero-stats span{font-size:.68rem}
  .brand{font-size:1rem;gap:8px}
  .brand small{display:none}
  .main-nav{position:fixed;inset:72px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.18s}
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .main-nav ul{flex-direction:column;padding:16px 24px;gap:4px}
  .main-nav a{display:block;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:flex}
  .process{grid-template-columns:repeat(2,1fr)}
  .reason-grid{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  #reference .wrap{display:flex;flex-direction:column}
  #reference .section-head{order:1}
  #reference .gallery-grid{order:2}
  #reference .ref-strip{order:3;margin:24px 0 0;gap:8px}
  #reference .ref-chip{padding:6px 12px;font-size:.78rem}
  .intro-shots{grid-template-columns:1fr;gap:14px;margin-left:-24px;margin-right:-24px;width:calc(100% + 48px)}
  .intro-shots img{aspect-ratio:4/3;border-radius:0;border-left:0;border-right:0}
  #cta .cta-banner{flex-direction:column;text-align:center}
  .footer-grid{grid-template-columns:1fr;gap:24px}
}
@media (max-width:480px){
  .process{grid-template-columns:1fr}
  .reason-grid{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:1fr}
  .hero h1{font-size:2.1rem}
}