/* Marble Supply Co. — material-truth / P-04 warm rust / F-03 Fraunces+Inter */
:root{
  --primary:#7C2D12; --secondary:#A8A29E; --accent:#C2410C;
  --text:#292524; --muted:#6B625C; --bg:#FAF7F2; --surface:#FFFFFF;
  --dark:#1C1917; --dark-text:#F5F0EA; --line:#E7DFD5;
  --font-h:"Fraunces",Georgia,"Times New Roman",serif;
  --font-b:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --container:min(1280px,92vw);
  --section:clamp(56px,7vw,104px);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-b);color:var(--text);background:var(--bg);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none}
h1,h2,h3{font-family:var(--font-h);font-weight:600;line-height:1.2;letter-spacing:.01em}
.wrap{width:var(--container);margin:0 auto}
section{padding:var(--section) 0}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{font-family:var(--font-h);font-size:1.45rem;font-weight:700;color:var(--text)}
.brand span{color:var(--primary)}
.main-nav{display:flex;gap:1.05rem;align-items:center}
.main-nav a{color:var(--text);font-size:.9rem;white-space:nowrap;font-weight:500;padding:.4rem 0;border-bottom:2px solid transparent}
.main-nav a.active{color:var(--primary);border-bottom-color:var(--accent)}
.nav-cta{background:var(--primary);color:#fff!important;padding:.6rem 1.3rem!important;border-radius:4px;border-bottom:none!important;font-weight:600}
/* 汉堡按钮样式：桌面端隐藏 / 移动端显示，见下方媒体查询 */

/* ---------- hero ---------- */
.hero{position:relative;padding:0;background:var(--dark)}
.hero-img{width:100%;height:clamp(380px,62vh,640px);object-fit:cover;opacity:.92}
.hero-plate{position:absolute;left:0;right:0;bottom:0;padding:2.2rem 0 2.6rem;background:linear-gradient(transparent,rgba(28,25,23,.82))}
.hero-plate .wrap{color:var(--dark-text)}
.hero-kicker{display:inline-block;font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;color:#E8B48C;margin-bottom:.7rem;font-weight:600}
.hero h1{color:#fff;font-size:clamp(2rem,4.6vw,3.6rem);max-width:20ch;margin-bottom:.8rem}
.hero-sub{color:#EDE6DB;font-size:1.08rem;max-width:62ch}
.hero-ctas{margin-top:1.4rem;display:flex;gap:.9rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.85rem 1.9rem;border-radius:4px;font-weight:600;font-size:1rem;transition:transform .18s var(--ease),background .18s var(--ease);cursor:pointer;border:1px solid transparent}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--primary);color:#fff}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.65)}
.btn-dark{background:var(--dark);color:var(--dark-text)}

/* ---------- section heads ---------- */
.sec-head{max-width:76ch;margin-bottom:2.6rem}
.sec-head .kicker{font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:700;display:block;margin-bottom:.6rem}
.sec-head h2{font-size:clamp(1.7rem,3.2vw,2.5rem);margin-bottom:.7rem}
.sec-head p{color:var(--muted);font-size:1.05rem}

/* ---------- audience split ---------- */
.aud-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.aud-card{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:1.6rem 1.4rem;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.aud-card h3{font-size:1.15rem;margin-bottom:.5rem;color:var(--primary)}
.aud-card p{font-size:.95rem;color:var(--muted)}

/* ---------- case plates (signature) ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.case-plate{background:var(--surface);border:1px solid var(--line);border-radius:4px;overflow:hidden;display:flex;flex-direction:column;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.case-plate img{width:100%;aspect-ratio:4/3;object-fit:cover}
.case-meta{padding:1.2rem 1.3rem 1.4rem;display:flex;flex-direction:column;gap:.35rem}
.case-loc{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700}
.case-plate h3{font-size:1.25rem}
.case-scope{font-size:.92rem;color:var(--muted)}
.case-year{font-size:.85rem;color:var(--secondary);font-weight:600}

/* ---------- material gallery ---------- */
.gal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.gal-item{position:relative;border-radius:4px;overflow:hidden;background:var(--dark)}
.gal-item img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .5s var(--ease)}
.gal-cap{position:absolute;left:0;right:0;bottom:0;padding:2.4rem 1.2rem 1.1rem;background:linear-gradient(transparent,rgba(28,25,23,.85));color:#fff}
.gal-cap h3{color:#fff;font-size:1.2rem;margin-bottom:.2rem}
.gal-cap p{font-size:.88rem;color:#E5DCCF}

/* ---------- split (text | image) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4.5rem);align-items:center}
.split.rev>.split-media{order:2}
.split-media img{border-radius:4px;width:100%;aspect-ratio:4/3;object-fit:cover}
.split-body h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:1rem}
.split-body p{color:var(--muted);margin-bottom:1rem}
.check-list{list-style:none;margin:1.2rem 0;display:grid;gap:.6rem}
.check-list li{padding-left:1.8rem;position:relative;font-size:.98rem}
.check-list li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}

/* ---------- proof strip ---------- */
.proof-strip{background:var(--dark);color:var(--dark-text)}
.proof-strip .sec-head h2{color:#fff}
.proof-strip .sec-head p{color:#CFC4B4}
.proof-nums{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;margin-top:1rem}
.proof-num{border-left:3px solid var(--accent);padding-left:1.2rem}
.proof-num .n{font-family:var(--font-h);font-size:2.2rem;font-weight:700;color:#fff}
.proof-num .l{font-size:.9rem;color:#CFC4B4}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;counter-reset:step}
.step{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:1.6rem 1.4rem;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--font-h);font-size:2rem;color:var(--accent);font-weight:700;display:block;margin-bottom:.6rem}
.step h3{font-size:1.1rem;margin-bottom:.5rem}
.step p{font-size:.93rem;color:var(--muted)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--primary);color:#fff;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(1.8rem,3.6vw,2.8rem);margin-bottom:.8rem}
.cta-band p{color:#F3E3D3;max-width:64ch;margin:0 auto 1.6rem}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.7)}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px}
.faq-item{border:1px solid var(--line);border-radius:4px;background:var(--surface);margin-bottom:.9rem;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;font-family:var(--font-h);font-size:1.12rem;font-weight:600;color:var(--text);padding:1.1rem 1.4rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq-q::after{content:"+";font-size:1.5rem;color:var(--accent);flex-shrink:0}
.faq-item.open .faq-q::after{content:"–"}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s var(--ease)}
.faq-a p{padding:0 1.4rem 1.3rem;color:var(--muted)}

/* ---------- contact / form ---------- */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(2rem,5vw,4rem);align-items:start}
.contact-facts{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:2rem}
.contact-facts h3{margin-bottom:1rem;color:var(--primary)}
.fact-row{display:flex;gap:.8rem;margin-bottom:1rem;font-size:.97rem}
.fact-row strong{min-width:88px;color:var(--text)}
.fact-row span{color:var(--muted)}
form.quote-form{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:2rem}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1rem}
.form-row.single{grid-template-columns:1fr}
label{display:block;font-size:.88rem;font-weight:600;margin-bottom:.35rem}
input[type=text],input[type=email],input[type=tel],select,textarea{width:100%;padding:.75rem .9rem;border:1px solid var(--line);border-radius:4px;font:inherit;background:#fff;color:var(--text)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
textarea{min-height:130px;resize:vertical}
.honeypot{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.form-note{font-size:.85rem;color:var(--muted);margin-top:.8rem}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:var(--dark-text);padding:3.5rem 0 1.5rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2.5rem}
.foot-grid h4{color:#fff;font-size:1rem;margin-bottom:1rem;font-family:var(--font-b);font-weight:700}
.foot-grid a{color:#CFC4B4;font-size:.93rem;display:block;margin-bottom:.55rem}
.foot-brand{font-family:var(--font-h);font-size:1.5rem;color:#fff;margin-bottom:.8rem}
.foot-brand span{color:#E8B48C}
.foot-grid p{color:#A89E90;font-size:.92rem;max-width:34ch}
.foot-base{border-top:1px solid #3A3532;padding-top:1.4rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.85rem;color:#A89E90}

/* ---------- breadcrumb / misc ---------- */
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:1.2rem}
.crumbs a{color:var(--muted)}
.page-hero{background:var(--dark);color:var(--dark-text);padding:3.2rem 0}
.page-hero h1{color:#fff;font-size:clamp(1.9rem,4vw,3rem);margin-bottom:.6rem}
.page-hero p{color:#CFC4B4;max-width:70ch}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}.gal-item img{transition:none}}

@media (hover:hover){
.main-nav a.active{color:var(--primary);border-bottom-color:var(--accent)}
}

.aud-grid>*,.case-grid>*,.gal-grid>*,.steps>*,.proof-nums>*,.split>*{min-width:0}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .aud-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid,.gal-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .proof-nums{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:var(--bg);flex-direction:column;align-items:stretch;padding:1rem 4vw 1.4rem;border-bottom:1px solid var(--line);gap:.2rem}
  .main-nav.open{display:flex}
  .main-nav a{padding:.7rem 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block;background:none;border:1px solid var(--line);border-radius:4px;padding:.5rem .7rem;font-size:1.2rem;cursor:pointer;color:var(--text)}
  .split{grid-template-columns:1fr}
  .split.rev>.split-media{order:0}
  .contact-grid{grid-template-columns:1fr}
  .case-grid,.gal-grid,.aud-grid,.steps{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-img{height:300px}
  .hero-plate{position:static;background:var(--dark);padding:1.6rem 0 1.8rem}
}