/* ==========================================================================
   KGX Trade — site.css
   Plumbing & Sanitary Supply · Stone & Granite
   Shared design system for index.html / stone.html / products.html /
   sourcing.html / about.html / contact.html
   ========================================================================== */

:root{
  --primary:#0f4c81;
  --primary-dark:#0a3862;
  --accent:#1c8ab3;
  --accent-soft:#e6f4f9;
  --ink:#1e2a36;
  --ink-soft:#52616f;
  --line:#e3e9ef;
  --bg:#ffffff;
  --bg-soft:#f6f9fb;
  --gold:#c8963e;
  --radius:12px;
  --shadow:0 10px 30px rgba(15,76,129,.10);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:hidden}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.wrap.wide{max-width:1280px}

/* ---------- Header ---------- */
header.site{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.3px;color:var(--primary)}
.logo .mark{width:34px;height:34px;border-radius:8px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;flex:0 0 34px}
.logo small{display:block;font-weight:600;color:var(--ink-soft);font-size:10px;letter-spacing:1.1px;text-transform:uppercase;line-height:1.2;white-space:nowrap}
nav.menu{display:flex;gap:22px;font-size:14.5px;flex:0 0 auto}
nav.menu a{color:var(--ink-soft);font-weight:600;white-space:nowrap}
nav.menu a:hover,nav.menu a.active{color:var(--primary)}

/* ---------- Buttons ---------- */
.btn{display:inline-block;background:var(--primary);color:#fff;font-weight:700;padding:11px 24px;border-radius:8px;font-size:15px;border:2px solid var(--primary);transition:.18s;cursor:pointer;white-space:nowrap;text-align:center}
.btn:hover{background:var(--primary-dark);border-color:var(--primary-dark)}
.btn.ghost{background:transparent;color:var(--primary)}
.btn.ghost:hover{background:var(--accent-soft)}
.btn.sm{padding:7px 16px;font-size:13.5px}
.btn.lg{padding:14px 30px;font-size:16px}
.btn.alt{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn.alt:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}

/* ---------- Hero (image) ---------- */
.hero{position:relative;color:#fff;padding:86px 0 104px;background:var(--primary-dark);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:var(--hero-img,none);background-position:center;background-size:cover;background-repeat:no-repeat;opacity:.62}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(8,44,78,.94) 0%,rgba(10,56,98,.86) 42%,rgba(12,66,105,.55) 72%,rgba(20,110,150,.30) 100%)}
.hero .wrap{position:relative;z-index:2}
.hero .crumb{font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:#bcd7e8;font-weight:700}
.hero h1{font-size:42px;line-height:1.16;margin:14px 0 16px;max-width:800px;font-weight:800}
.hero p.lead{max-width:680px;color:#dceaf3;font-size:17px}
.hero .btn{background:#fff;color:var(--primary);border-color:#fff}
.hero .btn:hover{background:#e6f4f9;border-color:#e6f4f9}

.chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.chip{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.32);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:600}

/* ---------- Hero slider ---------- */
.slider{position:relative;height:min(78vh,640px);min-height:480px;overflow:hidden;background:var(--primary-dark);color:#fff}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1s ease;display:flex;align-items:center}
.slide.is-active{opacity:1}
.slide .bg{position:absolute;inset:0;background-position:center;background-size:cover;transform:scale(1.04);transition:transform 8s linear}
.slide.is-active .bg{transform:scale(1)}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,42,74,.92) 0%,rgba(10,56,98,.72) 48%,rgba(10,56,98,.20) 100%)}
.slide .wrap{position:relative;z-index:2;padding-top:20px;padding-bottom:40px}
.slide .eyebrow{font-size:12.5px;letter-spacing:2.4px;text-transform:uppercase;color:#a9cbe0;font-weight:800;margin-bottom:14px}
.slide h1{font-size:clamp(28px,3.6vw,44px);line-height:1.16;max-width:760px;font-weight:800;letter-spacing:-.3px}
.slide h1 em{font-style:normal;color:#8fd0ea}
.slide p{max-width:620px;color:#d7e7f1;font-size:17px;margin-top:16px}
.slider-dots{position:absolute;bottom:26px;left:0;right:0;display:flex;gap:10px;justify-content:center;z-index:4}
.slider-dots button{width:34px;height:4px;border:0;border-radius:2px;background:rgba(255,255,255,.35);cursor:pointer;transition:.2s;padding:0}
.slider-dots button.is-active{background:#fff;width:52px}
.slider-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:4;width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(10,56,98,.25);color:#fff;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.slider-arrow:hover{background:rgba(10,56,98,.55)}
.slider-arrow.prev{left:18px}
.slider-arrow.next{right:18px}
@media (max-width:700px){.slider-arrow{display:none}}

/* ---------- Sections ---------- */
section.block{padding:64px 0}
section.block.soft{background:var(--bg-soft)}
section.block.tight{padding:44px 0}
.kicker{color:var(--accent);font-weight:800;font-size:13px;letter-spacing:2px;text-transform:uppercase}
h2.title{font-size:30px;line-height:1.25;margin:8px 0 12px;font-weight:800;letter-spacing:-.2px}
h3.subtitle{font-size:20px;margin:26px 0 10px}
p.sub{color:var(--ink-soft);max-width:720px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap}

/* ---------- Stats strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat{padding:26px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .num{font-size:30px;font-weight:800;color:var(--primary);letter-spacing:-.5px}
.stat .num small{font-size:15px;font-weight:700;color:var(--accent);margin-left:2px}
.stat .cap{font-size:13px;color:var(--ink-soft);margin-top:4px}

/* ---------- Cards / grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:30px}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card .icon{width:48px;height:48px;border-radius:10px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.card h3{font-size:16.5px;margin-bottom:7px}
.card p{font-size:13.5px;color:var(--ink-soft)}
.card .more{margin-top:12px;font-weight:700;font-size:13px;color:var(--accent);display:inline-block}

/* ---------- Photo cards ---------- */
.photo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.photo-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.photo-card .ph{height:220px;overflow:hidden;background:var(--bg-soft)}
.photo-card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.photo-card:hover .ph img{transform:scale(1.05)}
.photo-card .body{padding:18px 20px 22px}
.photo-card h3{font-size:16px;margin-bottom:6px}
.photo-card p{font-size:13.5px;color:var(--ink-soft)}

/* ---------- Advantages ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.adv{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;display:flex;gap:14px;align-items:flex-start}
.adv .dot{flex:0 0 40px;width:40px;height:40px;border-radius:10px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center}
.adv h3{font-size:15px;margin-bottom:4px}
.adv p{font-size:13.5px;color:var(--ink-soft)}

/* ---------- Catalog style (products page) ---------- */
.series-nav{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.series-nav a{border:1px solid var(--line);border-radius:999px;padding:8px 18px;font-size:14px;font-weight:600;color:var(--ink-soft);background:#fff}
.series-nav a:hover{color:var(--primary);border-color:var(--accent)}

.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.cat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;transition:.2s;display:flex;flex-direction:column}
.cat:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.cat .icon{width:48px;height:48px;border-radius:10px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.cat h3{font-size:15.5px;margin-bottom:6px}
.cat p{font-size:13px;color:var(--ink-soft);flex:1}
.cat .more{margin-top:12px;font-weight:700;font-size:13px;color:var(--accent)}

.family{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:32px}
.family-head{padding:26px 28px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#f8fbfd,#ffffff);display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.family-head h3{font-size:20px}
.family-head .tagline{color:var(--ink-soft);font-size:14.5px;margin-top:5px;max-width:780px}
.badge{flex:0 0 auto;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:12.5px;border-radius:999px;padding:5px 14px;white-space:nowrap}
.family-body{padding:24px 28px 30px}
.family-body h4{font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);margin:22px 0 10px}

.gallery{display:flex;gap:14px;overflow-x:auto;padding-bottom:10px;scrollbar-width:thin}
.gallery figure{flex:0 0 220px;background:#fafcfd;border:1px solid var(--line);border-radius:10px;padding:10px;text-align:center}
.gallery img{height:200px;width:100%;object-fit:contain}
.gallery figcaption{font-size:12.5px;color:var(--ink-soft);margin-top:8px}

.table-scroll{overflow-x:auto}
table.spec{width:100%;border-collapse:collapse;font-size:13.5px}
table.spec th,table.spec td{border:1px solid var(--line);padding:8px 11px;text-align:left;vertical-align:top}
table.spec thead th{background:var(--bg-soft);font-size:12.5px;letter-spacing:.4px}
table.spec td.model{font-weight:700;color:var(--primary);white-space:nowrap}
.notes{margin-top:14px;font-size:13.5px;color:var(--ink-soft);background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:12px 16px}

.model-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.mchip{background:var(--accent-soft);color:var(--primary);font-weight:600;font-size:12.5px;border-radius:999px;padding:4px 12px}

/* ---------- Split / lists ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;margin-top:30px;align-items:start}
.split.reverse{grid-template-columns:.95fr 1.05fr}
.check-list{margin-top:16px}
.check-list li{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px}
.check-list li:last-child{border-bottom:0}
.check-list svg{flex:0 0 20px;margin-top:3px}
.panel{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.panel h4{font-size:16px;margin-bottom:14px;color:var(--primary)}
.certs{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.cert{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 18px;font-weight:700;font-size:14px;color:var(--primary)}
.cert span.note{font-weight:500;font-size:12px;color:var(--ink-soft);display:block}
.scene-img{border-radius:var(--radius);border:1px solid var(--line);overflow:hidden}
.scene-img img{width:100%;height:100%;object-fit:cover}

/* ---------- Value / process steps ---------- */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);position:absolute;top:18px;right:20px;font-size:26px;font-weight:800;color:var(--accent-soft);letter-spacing:-1px}
.step h3{font-size:15.5px;margin-bottom:6px;max-width:85%}
.step p{font-size:13.5px;color:var(--ink-soft)}

/* ---------- Spec highlight list ---------- */
.spec-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.spec-item{background:#fff;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;padding:16px 18px}
.spec-item .k{font-size:12px;letter-spacing:1.2px;text-transform:uppercase;color:var(--ink-soft);font-weight:700}
.spec-item .v{font-size:19px;font-weight:800;color:var(--primary);margin-top:2px}
.spec-item .v small{font-size:12.5px;font-weight:600;color:var(--ink-soft)}

/* ---------- Contact ---------- */
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;text-align:center}
.contact-card .icon{width:54px;height:54px;border-radius:50%;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.contact-card h3{font-size:15px;margin-bottom:8px}
.contact-card a.big{font-weight:800;font-size:17px;word-break:break-all}
.contact-card p{font-size:13px;color:var(--ink-soft);margin-top:8px}
.contact-card .btn{margin-top:16px}

/* ---------- FAQ ---------- */
.faq{margin-top:26px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:20px;font-weight:700;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{font-size:14px;color:var(--ink-soft);margin-top:10px}

/* ---------- CTA / footer ---------- */
.cta{background:linear-gradient(135deg,#0a3862,#0f4c81);color:#fff;text-align:center;padding:68px 0}
.cta h2{font-size:30px;margin-bottom:10px}
.cta p{color:#c9dcec;max-width:620px;margin:0 auto 24px}
.cta .btn{background:#fff;color:var(--primary);border-color:#fff}
.cta .btn:hover{background:#e6f4f9}

footer.site{background:#101c26;color:#8fa3b3;padding:44px 0 28px;font-size:13.5px}
footer.site .cols{display:flex;justify-content:space-between;gap:34px;flex-wrap:wrap}
footer.site strong{color:#fff;display:block;margin-bottom:8px;font-size:14px}
footer.site a{color:#a9c3d6}
footer.site a:hover{color:#fff}
footer.site .bottom{margin-top:26px;padding-top:18px;border-top:1px solid #1d2d3a;font-size:12.5px;color:#6f8494;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ---------- Utilities ---------- */
.mt-0{margin-top:0}
.text-center{text-align:center}
.lead-lg{font-size:16.5px;color:var(--ink-soft);max-width:760px}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .grid-4,.cat-grid{grid-template-columns:repeat(2,1fr)}
  .grid-3,.steps,.adv-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .split,.split.reverse{grid-template-columns:1fr}
  .spec-strip{grid-template-columns:repeat(2,1fr)}
  nav.menu{display:none}
  .hero h1{font-size:32px}
}
@media (max-width:640px){
  header.site .nav{height:58px;gap:8px}
  .logo{font-size:17px;gap:8px}
  .logo .mark{width:30px;height:30px;flex:0 0 30px;font-size:13px}
  .logo small{display:none}
  header.site .nav .btn.sm{padding:6px 11px;font-size:12px;border-width:1px}
  section.block{padding:46px 0}
  .grid-4,.grid-3,.grid-2,.cat-grid,.steps,.adv-grid,.contact-cards{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line)}
  .hero h1{font-size:27px}
  h2.title{font-size:24px}
  .slider{height:auto;min-height:0;padding:60px 0 70px}
  .slide{position:relative;opacity:1;display:none}
  .slide.is-active{display:flex}
}

/* header layout guard */
.logo{flex:0 0 auto;white-space:nowrap}
header.site .nav .btn.sm{flex:0 0 auto}