/* ===== Design tokens ===== */
:root{
  --stone:#75797f;
  --stone-dark:#54585e;
  --stone-light:#eceae6;
  --bg:#f4f3f1;
  --white:#ffffff;
  --charcoal:#2a2c30;
  --silver:#aeb2b8;
  --border:#dcdad5;
  --text:#2f3134;
  --text-mute:#6c6f74;
  --radius:10px;
  --shadow:0 2px 14px rgba(42,44,48,.06);
  --maxw:1120px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Malgun Gothic","Apple SD Gothic Neo",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3{margin:0 0 12px;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 12px;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section-narrow{max-width:760px;margin:0 auto;padding:0 24px;}

.eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  color:var(--stone-dark);
  background:var(--stone-light);
  border:1px solid var(--border);
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:14px;
  letter-spacing:.02em;
}
.section-head{text-align:center;max-width:640px;margin:0 auto 44px;}
.section-head h2{font-size:clamp(22px,3vw,30px);}
.lead{color:var(--text-mute);font-size:16px;}
section{padding:64px 0;}
section.alt{background:var(--white);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:8px;font-weight:700;font-size:15px;
  border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--charcoal);color:var(--white);}
.btn-primary:hover{background:var(--stone-dark);}
.btn-outline{background:var(--white);color:var(--charcoal);border-color:var(--border);}
.btn-outline:hover{border-color:var(--stone);}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(6px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;gap:24px;height:72px;}
.logo{display:flex;align-items:center;gap:10px;margin-right:auto;}
.logo-mark{
  width:30px;height:30px;border-radius:7px;flex:none;
  background:linear-gradient(135deg,var(--charcoal),var(--stone));
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:7px;border:2px solid var(--silver);border-radius:3px;
}
.logo-mark.small{width:24px;height:24px;}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text{font-weight:800;font-size:19px;color:var(--charcoal);}
.logo-text em{font-style:normal;font-weight:500;font-size:11px;color:var(--text-mute);}
.site-nav ul{display:flex;gap:22px;}
.site-nav a{font-size:14.5px;font-weight:600;color:var(--text-mute);padding:6px 0;border-bottom:2px solid transparent;}
.site-nav a:hover,.site-nav a.active{color:var(--charcoal);border-color:var(--stone);}
.header-cta{padding:10px 18px;font-size:14px;white-space:nowrap;}
@media (max-width:860px){.site-nav{display:none;}}

.floating-call{
  position:fixed;right:20px;bottom:20px;z-index:60;
  display:flex;align-items:center;gap:8px;
  background:var(--charcoal);color:var(--white);
  padding:14px 20px;border-radius:999px;box-shadow:0 8px 24px rgba(0,0,0,.24);
  font-weight:700;font-size:14.5px;
}

/* ===== Section 1: Intro hero ===== */
.hero{
  padding:64px 0 56px;
  background:
    linear-gradient(rgba(244,243,241,.94),rgba(244,243,241,.94)),
    url('/assets/images/work/cta-banner.webp') center/cover no-repeat;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero h1{font-size:clamp(28px,4vw,42px);line-height:1.28;}
.hero .lead{font-size:16.5px;max-width:460px;}
.hero-cta{display:flex;gap:12px;margin-top:28px;}

.hero-slider{
  position:relative;height:400px;border-radius:18px;overflow:hidden;
  border:1px solid var(--border);background:var(--stone-light);
}
.hero-slider .slide{
  position:absolute;inset:0;opacity:0;
  animation:heroFade 8s infinite;
}
.hero-slider .slide:nth-child(2){animation-delay:4s;}
.hero-slider .slide img{width:100%;height:100%;object-fit:cover;display:block;}
.hero-slider .slide span{
  position:absolute;left:20px;bottom:20px;background:rgba(42,44,48,.88);color:var(--white);
  font-size:13px;font-weight:700;padding:8px 16px;border-radius:999px;letter-spacing:.01em;
}
@keyframes heroFade{
  0%{opacity:0;}
  5%{opacity:1;}
  45%{opacity:1;}
  50%{opacity:0;}
  100%{opacity:0;}
}
@media (prefers-reduced-motion: reduce){
  .hero-slider .slide{animation:none;opacity:0;}
  .hero-slider .slide:first-child{opacity:1;}
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;}
  .hero-slider{height:260px;}
}

/* ===== Section 2: Big case cards (2x scale) ===== */
.big-case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.big-case-card{
  position:relative;overflow:hidden;border-radius:16px;
  background:var(--white);border:1px solid var(--border);box-shadow:var(--shadow);
}
.big-case-card img{height:260px;width:100%;object-fit:cover;display:block;}
.big-case-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg, transparent 42%, rgba(255,255,255,.6) 50%, transparent 58%);
  transform:translateX(-130%);
  transition:transform .8s ease;
  pointer-events:none;
}
.big-case-card:hover::after{transform:translateX(130%);}
.big-case-card .cap{padding:18px 22px 22px;}
.big-case-card h3{font-size:17px;margin-bottom:4px;}
.big-case-card p{font-size:13.5px;color:var(--text-mute);margin:0;}
@media (max-width:900px){.big-case-grid{grid-template-columns:1fr;}}

/* ===== Section 3: Customer question marquee ===== */
.question-square{
  flex:none;width:210px;height:210px;
  background:var(--white);border:1px solid var(--border);border-radius:14px;
  padding:22px;display:flex;flex-direction:column;justify-content:center;gap:10px;
  box-shadow:var(--shadow);
}
.question-square span{color:var(--silver);font-weight:800;font-size:22px;line-height:1;}
.question-square p{font-weight:600;font-size:15px;color:var(--charcoal);margin:0;}
.question-square.highlight{
  border:2px solid var(--charcoal);background:var(--stone-light);
}
.question-square.highlight span{color:var(--charcoal);}
.question-square.link{
  border:2px solid var(--stone-dark);background:var(--charcoal);transition:background .15s;
  align-items:center;justify-content:center;text-align:center;
}
.question-square.link:hover{background:var(--stone-dark);}
.question-square.link p{color:var(--white);}
.cute-eye{margin-top:2px;}
.cute-eye .pupil{transition:transform .2s;}
.question-square.link:hover .cute-eye .pupil{transform:translate(1px,1px);}

/* ===== Section 4: Real case photo grid (2x2) ===== */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:760px;margin:0 auto;}
.case-cell{
  background:var(--white);border:1px solid var(--border);border-radius:14px;overflow:hidden;
  position:relative;
}
.case-visual{position:relative;aspect-ratio:1/1;background:var(--stone-light);}
.case-visual img{width:100%;height:100%;object-fit:cover;display:block;}
.case-visual span{
  position:absolute;left:14px;bottom:14px;background:var(--charcoal);color:var(--white);
  font-size:13px;font-weight:700;padding:7px 16px;border-radius:999px;
}
@media (max-width:600px){
  .case-grid{grid-template-columns:1fr;}
}

/* ===== Section 5: Small pollution type cards ===== */
.mini-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.mini-card{
  background:var(--white);border:1px solid var(--border);border-radius:10px;
  padding:16px;display:flex;align-items:center;gap:10px;
}
.mini-card .dot{
  width:30px;height:30px;flex:none;border-radius:8px;background:var(--stone-light);
  display:flex;align-items:center;justify-content:center;color:var(--stone-dark);
}
.mini-card span{font-weight:600;font-size:14px;}
@media (max-width:760px){.mini-grid{grid-template-columns:repeat(2,1fr);}}

/* ===== Process timeline ===== */
.timeline{display:flex;align-items:flex-start;justify-content:space-between;gap:0;position:relative;flex-wrap:wrap;}
.timeline::before{
  content:"";position:absolute;top:19px;left:5%;right:5%;height:2px;background:var(--border);
}
.timeline-step{flex:1;min-width:130px;text-align:center;position:relative;padding:0 8px;}
.timeline-step .num{
  width:40px;height:40px;border-radius:50%;background:var(--charcoal);color:var(--white);
  display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 14px;position:relative;z-index:1;
}
.timeline-step h3{font-size:15px;margin-bottom:4px;}
.timeline-step p{font-size:13px;color:var(--text-mute);margin:0;}

/* ===== Building-silhouette photo cards (related services) ===== */
.building-card-v2{
  position:relative;display:block;overflow:hidden;
  clip-path:polygon(22% 0%, 78% 0%, 78% 13%, 100% 13%, 100% 100%, 0% 100%, 0% 13%, 22% 13%);
  aspect-ratio:3/4;background:var(--stone-light);border:1px solid var(--border);
}
.building-card-v2 img{width:100%;height:100%;object-fit:cover;display:block;}
.building-card-v2 .label{
  position:absolute;left:0;right:0;bottom:0;padding:26px 12px 14px;text-align:center;
  background:linear-gradient(to top, rgba(42,44,48,.9), transparent);
  color:var(--white);font-weight:700;font-size:13.5px;
}
.building-card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.building-card-grid.cols-5{grid-template-columns:repeat(5,1fr);}
.building-card-grid .label{font-size:15px;}
@media (max-width:760px){.building-card-grid{grid-template-columns:repeat(2,1fr);}}

/* ===== Infinite marquee (FAQ / NSEO carousel) ===== */
.marquee{overflow:hidden;position:relative;}
.marquee::before,.marquee::after{
  content:"";position:absolute;top:0;bottom:0;width:60px;z-index:2;pointer-events:none;
}
.marquee::before{left:0;background:linear-gradient(90deg,var(--bg),transparent);}
.marquee::after{right:0;background:linear-gradient(270deg,var(--bg),transparent);}
section.alt .marquee::before{background:linear-gradient(90deg,var(--white),transparent);}
section.alt .marquee::after{background:linear-gradient(270deg,var(--white),transparent);}
.marquee-track{display:flex;gap:16px;width:max-content;animation:marqueeScroll 34s linear infinite;}
.marquee:hover .marquee-track{animation-play-state:paused;}
@keyframes marqueeScroll{
  0%{transform:translateX(0);}
  100%{transform:translateX(-50%);}
}
@media (prefers-reduced-motion: reduce){
  .marquee-track{animation:none;overflow-x:auto;}
}

/* ===== FAQ 3x3 static grid ===== */
.faq-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);}
.faq-card .q{display:flex;gap:8px;font-weight:700;margin-bottom:8px;color:var(--charcoal);}
.faq-card .q span{color:var(--stone);flex:none;}
.faq-card .a{display:flex;gap:8px;color:var(--text-mute);font-size:14.5px;margin:0;}
.faq-card .a span{color:var(--silver);flex:none;font-weight:700;}
.faq-3x3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.faq-3x3 .faq-card{padding:18px;box-shadow:none;}
.faq-3x3 .q{font-size:14px;margin-bottom:6px;}
.faq-3x3 .a{font-size:12.5px;}
@media (max-width:760px){.faq-3x3{grid-template-columns:1fr 1fr;}}
@media (max-width:520px){.faq-3x3{grid-template-columns:1fr;}}

/* ===== Question / NSEO marquee square cards ===== */
.faq-square{
  flex:none;width:230px;height:230px;
  background:var(--white);border:1px solid var(--border);border-radius:14px;padding:22px;
  display:flex;flex-direction:column;box-shadow:var(--shadow);
}
.faq-square .q{font-weight:700;font-size:14.5px;color:var(--charcoal);margin-bottom:10px;}
.faq-square .q span{color:var(--stone);margin-right:6px;}
.faq-square .a{font-size:12.5px;color:var(--text-mute);margin:0;}
.faq-square .a span{color:var(--silver);font-weight:700;margin-right:6px;}

/* ===== NSEO carousel cards ===== */
.nseo-marquee-card{flex:none;width:255px;}
.nseo-marquee-card .building-card-v2{aspect-ratio:1/1;}
.nseo-marquee-card .label{font-size:15.5px;padding:34px 12px 18px;}

/* ===== CTA (Section 9) ===== */
.cta-band{
  background:
    linear-gradient(rgba(28,29,32,.86),rgba(28,29,32,.9)),
    url('/assets/images/work/cta-banner.webp') center/cover no-repeat;
  color:var(--white);text-align:center;padding:80px 0;
}
.cta-band h2{font-size:clamp(22px,3.4vw,30px);white-space:pre-line;}
.cta-band p{color:#c7c9cc;margin-bottom:26px;}
.cta-band .btn-primary{background:var(--white);color:var(--charcoal);}
.cta-band .btn-primary:hover{background:var(--silver);}

/* ===== Sub-page content blocks ===== */
.page-hero{padding:56px 0 0;}
.page-hero h1{font-size:clamp(24px,3.6vw,34px);}
.content-block{max-width:820px;margin:0 auto;}
.content-block h2{font-size:20px;margin-top:36px;}
.content-block ul.check li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--text-mute);}
.content-block ul.check li::before{content:"✓";position:absolute;left:0;color:var(--stone-dark);font-weight:700;}
.info-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);}

/* ===== Before/after photo header (NSEO + region pages) ===== */
.before-after{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:820px;margin:28px auto 0;}
.before-after figure{margin:0;border-radius:14px;overflow:hidden;border:1px solid var(--border);background:var(--white);}
.before-after img{width:100%;height:300px;object-fit:cover;display:block;}
.before-after figcaption{padding:10px;font-size:13px;font-weight:700;color:var(--text-mute);text-align:center;}
@media (max-width:640px){
  .before-after{grid-template-columns:1fr;}
  .before-after img{height:220px;}
}
.before-after.stack{grid-template-columns:1fr;max-width:380px;}
.hero-slider.standalone{max-width:640px;margin:28px auto 0;}

/* ===== Region page: location tags + diagnosis table ===== */
.loc-tags{display:flex;gap:10px;justify-content:center;margin:18px 0 0;flex-wrap:wrap;}
.loc-tags span{
  background:var(--stone-light);border:1px solid var(--border);color:var(--stone-dark);
  font-size:13px;font-weight:700;padding:6px 16px;border-radius:999px;
}
.diagnosis-table{width:100%;border-collapse:collapse;margin:18px 0 28px;font-size:14px;}
.diagnosis-table th,.diagnosis-table td{
  border:1px solid var(--border);padding:12px 14px;text-align:left;
}
.diagnosis-table th{background:var(--stone-light);color:var(--charcoal);width:30%;font-weight:700;}
.diagnosis-table td{color:var(--text-mute);}
/* ===== Footer ===== */
.site-footer{background:var(--white);border-top:1px solid var(--border);padding:44px 0 30px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:15px;margin-bottom:18px;}
.footer-brand span{color:var(--text-mute);font-weight:400;font-size:13px;}
.footer-info{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13.5px;color:var(--text-mute);margin-bottom:18px;}
.footer-nav{display:flex;flex-wrap:wrap;gap:14px;font-size:13.5px;margin-bottom:18px;}
.footer-nav a:hover{color:var(--charcoal);}
.footer-note{font-size:12.5px;color:var(--silver);margin-bottom:6px;}
.footer-copy{font-size:12px;color:var(--silver);margin:0;}