/* ============================================================
   WEILUMEN · Hotel Furniture Lighting
   Editorial light theme: warm ivory paper, brass accent, serif display
   ============================================================ */
:root{
  --paper:#f6f3ec;
  --paper-alt:#efeae0;
  --ink:#17170f;
  --ink-soft:#4a4a3e;
  --muted:#7a7669;
  --brass:#8a6a3b;
  --brass-light:#c8a86a;
  --line:#dcd5c5;
  --serif:Georgia,"Times New Roman","Songti SC",serif;
  --sans:-apple-system,"Segoe UI","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
::selection{background:rgba(200,168,106,.35)}
img{display:block;max-width:100%}
.container{max-width:1180px;margin:0 auto;padding:0 32px}

.eyebrow{
  font-size:11px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--brass);margin-bottom:18px;font-weight:600;
}
h1,h2,h3{font-family:var(--serif);font-weight:400;letter-spacing:-.01em}
.section{padding:110px 0;border-top:1px solid var(--line)}
.section-alt{background:var(--paper-alt)}
.section-head{max-width:720px;margin-bottom:56px}
.section-head h2,.about-copy h2,.contact-copy h2{
  font-size:clamp(30px,3.8vw,46px);line-height:1.18;
}
.section-sub{color:var(--ink-soft);margin-top:18px;font-size:16.5px}
.footnote{color:var(--muted);font-size:13.5px;margin-top:28px;font-style:italic}

/* buttons */
.btn{
  display:inline-block;padding:15px 32px;border-radius:2px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  font-weight:600;text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:.25s;font-family:var(--sans);
}
.btn-solid{background:var(--ink);color:var(--paper)}
.btn-solid:hover{background:var(--brass);color:#fff}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{border-color:var(--brass);color:var(--brass)}
.btn-full{width:100%;text-align:center}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s;background:rgba(246,243,236,0)}
.nav.scrolled{background:rgba(246,243,236,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.logo-mark{width:26px;height:26px;color:var(--brass)}
.logo-text{font-size:17px;letter-spacing:.26em;font-weight:600}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{
  color:var(--ink-soft);text-decoration:none;font-size:12.5px;
  letter-spacing:.12em;text-transform:uppercase;transition:.2s;
}
.nav-links a:hover{color:var(--brass)}
.nav-links a.nav-cta{border:1px solid var(--ink);padding:10px 22px;color:var(--ink)}
.nav-links a.nav-cta:hover{background:var(--ink);color:var(--paper)}
.nav-burger{display:none;background:none;border:none;cursor:pointer;padding:6px}
.nav-burger span{display:block;width:22px;height:1.5px;background:var(--ink);margin:5px 0}

/* hero */
.hero{padding:150px 0 90px}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
.hero h1{font-size:clamp(40px,5.2vw,68px);line-height:1.08;letter-spacing:-.02em}
.hero-sub{color:var(--ink-soft);margin-top:26px;font-size:17px;max-width:520px}
.hero-cta{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
.hero-facts{margin-top:54px;border-top:1px solid var(--line);padding-top:26px;display:grid;gap:14px;max-width:520px}
.hero-facts div{display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:baseline}
.hero-facts dt{
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--brass);font-weight:600;
}
.hero-facts dd{font-size:14.5px;color:var(--ink-soft);line-height:1.6}
.hero-media img{width:100%;aspect-ratio:4/5;object-fit:cover;filter:saturate(.95)}
.caption{font-size:12px;color:var(--muted);margin-top:12px;letter-spacing:.04em}

/* products */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.prod-card{padding:34px 28px 30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:.3s}
.prod-card:last-child{border-right:1px solid var(--line)}
.prod-card:hover{background:#fffdf8}
.prod-no{font-size:11px;letter-spacing:.18em;color:var(--brass);margin-bottom:16px}
.prod-card h3{font-size:22px;margin-bottom:12px}
.prod-desc{font-size:14px;color:var(--ink-soft);line-height:1.65;min-height:88px}
.spec{list-style:none;margin-top:18px;border-top:1px solid var(--line);padding-top:14px}
.spec li{display:flex;justify-content:space-between;gap:10px;font-size:12.5px;padding:5px 0;color:var(--ink-soft)}
.spec li span:first-child{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:11px}

/* applications */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.app-card img{width:100%;aspect-ratio:4/5;object-fit:cover;transition:transform .6s ease}
.app-card{overflow:hidden}
.app-card:hover img{transform:scale(1.04)}
.app-card figcaption{padding-top:18px}
.app-card strong{display:block;font-family:var(--serif);font-size:19px;font-weight:400;margin-bottom:6px}
.app-card span{font-size:13.5px;color:var(--muted);line-height:1.6}

/* capability */
.cap-list{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.cap-list li{display:flex;gap:18px;padding:32px 26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.cap-list li>span{font-family:var(--serif);font-size:26px;color:var(--brass-light);line-height:1}
.cap-list h3{font-size:19px;margin-bottom:8px}
.cap-list p{font-size:14px;color:var(--ink-soft);line-height:1.6}

/* about */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
.about-copy p{color:var(--ink-soft);margin-top:18px;font-size:16px}
.about-entities{list-style:none;margin-top:32px;border-top:1px solid var(--line)}
.about-entities li{display:grid;grid-template-columns:110px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.about-entities strong{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--brass)}
.about-entities span{font-size:14px;color:var(--ink-soft)}
.about-media img{width:100%;aspect-ratio:1/1;object-fit:cover}

/* contact */
.contact{background:var(--paper-alt)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.contact-list{list-style:none;margin-top:30px}
.contact-list li{
  padding:12px 0 12px 22px;position:relative;border-bottom:1px solid var(--line);
  font-size:14.5px;color:var(--ink-soft);
}
.contact-list li::before{content:"";position:absolute;left:0;top:20px;width:10px;height:1px;background:var(--brass)}
.contact-form{background:var(--paper);border:1px solid var(--line);padding:38px}
.contact-form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact-form label{display:block;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.contact-form input,.contact-form select,.contact-form textarea{
  width:100%;margin-top:8px;padding:12px 14px;border:1px solid var(--line);
  background:#fffdf8;font-family:var(--sans);font-size:14.5px;color:var(--ink);
  border-radius:2px;transition:.2s;resize:vertical;
}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{
  outline:none;border-color:var(--brass);box-shadow:0 0 0 3px rgba(138,106,59,.1);
}
.form-tip{font-size:12px;color:var(--muted);margin-top:14px;text-align:center}
.form-tip.ok{color:var(--brass)}

/* footer */
.footer{border-top:1px solid var(--line);padding:56px 0 32px}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.footer-brand{font-size:16px;letter-spacing:.26em;font-weight:600}
.footer-sub{font-size:13px;color:var(--muted);margin-top:8px}
.footer-links{display:flex;gap:26px;flex-wrap:wrap;align-items:flex-start}
.footer-links a{font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);text-decoration:none}
.footer-links a:hover{color:var(--brass)}
.footer-meta{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:11.5px;letter-spacing:.08em;color:var(--muted);
}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media (max-width:980px){
  .section{padding:76px 0}
  .hero{padding:120px 0 60px}
  .hero-inner,.about-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .hero-media img{aspect-ratio:16/10}
  .prod-grid{grid-template-columns:1fr 1fr}
  .cap-list{grid-template-columns:1fr 1fr}
  .app-grid{grid-template-columns:1fr 1fr}
  .nav-links{
    position:fixed;top:78px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:6px;
    background:rgba(246,243,236,.98);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
    padding:18px 32px 24px;transform:translateY(-140%);transition:.35s;
  }
  .nav-links.open{transform:none}
  .nav-links a{padding:10px 0;font-size:14px}
  .nav-burger{display:block}
}
@media (max-width:620px){
  .container{padding:0 20px}
  .prod-grid,.cap-list,.app-grid{grid-template-columns:1fr}
  .contact-form{padding:26px}
  .contact-form .row{grid-template-columns:1fr}
  .hero h1{font-size:36px}
}