:root{
  --bg:#f3efe7;
  --paper:#fffaf2;
  --ink:#1d1d19;
  --muted:#6f685e;
  --line:#d8cdbc;
  --accent:#6c7a58;
  --warm:#9b7450;
  --soft:#e9dfcf;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
header{
  padding:22px 42px;
  background:rgba(255,250,242,.94);
  border-bottom:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  align-items:center;
  position:sticky;
  top:0;
  z-index:5;
}
.logo{font-size:25px;font-weight:900;letter-spacing:.1em}
nav a{margin-left:20px;color:var(--muted);font-size:14px}
nav a:hover{color:var(--ink)}
main{max-width:1220px;margin:0 auto;padding:48px 28px 80px}
h1{font-size:54px;line-height:1.04;margin:0 0 18px}
h2{font-size:32px;margin:0 0 14px}
h3{font-size:21px;margin:0 0 8px}
p{color:var(--muted);line-height:1.55}
.hero{display:grid;grid-template-columns:.95fr 1.05fr;gap:34px;align-items:center;min-height:470px}
.panel{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:28px;
  padding:26px;
  box-shadow:0 14px 40px rgba(29,29,25,.08);
}
.hero-img,.viewer{
  border-radius:28px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 18px 50px rgba(29,29,25,.12);
  background:#111;
}
.tag{
  display:inline-block;
  padding:7px 11px;
  border-radius:999px;
  background:var(--soft);
  color:var(--accent);
  font-size:12px;
  font-weight:800;
  margin-bottom:12px;
}
.btnrow{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-block;background:var(--ink);color:white;padding:14px 22px;border-radius:999px;font-weight:700}
.btn.secondary{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.section{margin-top:58px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:24px;
  overflow:hidden;
}
.cardbody{padding:22px}
.price{font-weight:800;color:var(--warm)}
.feature-card{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  overflow:hidden;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:28px;
}
.feature-card .cardbody{padding:32px}
.model-viewer-section{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:28px;
  padding:18px;
  box-shadow:0 14px 40px rgba(29,29,25,.08);
}
.model-frame{
  position:relative;
  min-height:520px;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:22px;
  background:radial-gradient(circle at 50% 18%, #fff4dc 0, #e8dcc8 34%, #1b1a17 100%);
}
.model-frame model-viewer{
  width:100%;
  height:520px;
  --poster-color:transparent;
}
.model-hint{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:white;
  font-weight:700;
}
.model-error{
  background:rgba(29,29,25,.72);
  padding:18px;
  text-align:center;
}
.viewer-caption{
  position:absolute;
  right:18px;
  bottom:18px;
  padding:9px 13px;
  border-radius:999px;
  background:rgba(255,250,242,.88);
  color:var(--muted);
  font-size:13px;
  font-weight:700;
}
.model-toolbar{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:14px;
}
.model-option{
  border:1px solid var(--line);
  background:#fffaf2;
  color:var(--muted);
  border-radius:999px;
  padding:10px 14px;
  font:inherit;
  font-size:13px;
  font-weight:800;
  cursor:pointer;
}
.model-option:hover,
.model-option.active{
  background:var(--ink);
  border-color:var(--ink);
  color:white;
}
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
.steps,.specs{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.stepbox,.spec{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:22px;
  padding:22px;
}
.note{
  border-left:4px solid var(--accent);
  background:#fff8ed;
  border-radius:12px;
  padding:14px 18px;
  color:var(--muted);
  margin-top:16px;
}
.mock{
  height:245px;
  background:#eee2d2;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  color:#6f685e;
}
.footer{border-top:1px solid var(--line);text-align:center;padding:28px;color:var(--muted)}
.timeline{margin-top:54px;display:grid;gap:22px}
.process-step{
  display:grid;
  grid-template-columns:90px 1fr 330px;
  gap:22px;
  align-items:stretch;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:26px;
  overflow:hidden;
}
.number{background:var(--accent);color:white;font-size:32px;font-weight:900;display:flex;align-items:center;justify-content:center}
.content{padding:24px}
.lab-hero-box{
  background:linear-gradient(135deg,#2a2a25,#5b4a3a);
  min-height:420px;
  border-radius:28px;
  padding:32px;
  color:white;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  overflow:hidden;
  position:relative;
}
.lab-hero-box:before{
  content:"";
  position:absolute;
  width:360px;height:360px;
  right:-80px;top:-70px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,226,160,.45), rgba(255,226,160,0) 65%);
}
.lab-hero-box h2,.lab-hero-box p{color:white;position:relative}
.lab-hero-box p{opacity:.82}
.formmock{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:28px;
  padding:26px;
}
.input,.upload{
  border:1px solid var(--line);
  background:#fff;
  border-radius:16px;
  margin:10px 0 18px;
  color:var(--muted);
}
.input{height:52px;padding:15px}
.upload{height:145px;display:flex;align-items:center;justify-content:center;border-style:dashed}
@media(max-width:900px){
  header{display:block}
  nav{margin-top:12px}
  nav a{margin:0 14px 8px 0;display:inline-block}
  .hero,.split,.steps,.specs,.process-step,.feature-card,.grid2{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr}
  h1{font-size:38px}
  .model-frame{min-height:380px}
  .model-frame model-viewer{height:380px}
}