:root{
  --bg:#f5f3ef;--panel:#ffffff;--ink:#18211f;--muted:#68726d;--line:#d8d4ca;
  --graphite:#202827;--green:#2d6f63;--clay:#b56f46;--blue:#496f8f;--gold:#9a7c33;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);letter-spacing:0}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px clamp(18px,4vw,54px);background:rgba(245,243,239,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:210px}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:8px;background:var(--graphite);color:#fff;font-weight:800}.brand small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.nav{display:flex;gap:4px;align-items:center;justify-content:flex-end;flex-wrap:wrap}.nav a{padding:10px 12px;border-radius:7px;color:#2b3431;font-size:14px}.nav a:hover,.nav a.active{background:#e7ece7;color:#123d33}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:7px;padding:8px 10px}
.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);gap:34px;align-items:center;min-height:calc(100vh - 72px);padding:clamp(30px,6vw,76px) clamp(18px,5vw,72px) 42px}
.hero h1{font-size:clamp(34px,6vw,70px);line-height:1.04;margin:12px 0 18px;max-width:900px}.lead{font-size:clamp(17px,2.3vw,21px);line-height:1.65;color:#4c5651;max-width:720px}.eyebrow{margin:0;color:var(--green);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.hero-actions,.trust-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.button,.hero-actions a,.hero-actions button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:11px 16px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);cursor:pointer}.button.primary,.hero-actions .primary{background:var(--green);color:#fff;border-color:var(--green)}.button.ghost{background:transparent}
.trust-row span{padding:8px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted);font-size:13px}
.hero-visual{margin:0;position:relative}.hero-visual img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;box-shadow:0 24px 80px rgba(31,34,30,.18)}.hero-visual figcaption{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.86);padding:10px 12px;border-radius:7px;font-weight:700}
.notice-band{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;padding:14px 20px;background:#20312e;color:#fff}.notice-band span{color:#cfd9d5}
.section{padding:clamp(44px,7vw,88px) clamp(18px,5vw,72px);border-top:1px solid var(--line)}.section-head{max-width:820px;margin-bottom:26px}.section h2{font-size:clamp(27px,4vw,44px);line-height:1.12;margin:8px 0 10px}.section p{line-height:1.65;color:#59625e}
.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.info-card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:22px}.info-card span{color:var(--clay);font-weight:900}.info-card h3{margin:14px 0 8px}.cert-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}.cert-strip span{background:#ece8df;border:1px solid #d4cab9;padding:14px;border-radius:7px;text-align:center;font-weight:700;color:#61513b}
.product-expander{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.product-expander article{min-height:280px;display:flex;flex-direction:column;justify-content:space-between;padding:22px;border-radius:8px;background:#fff;border:1px solid var(--line);transition:transform .18s ease,background .18s ease,box-shadow .18s ease}.product-expander article:hover,.product-expander article:focus{transform:translateY(-5px);background:#f9fbf6;box-shadow:0 18px 50px rgba(20,32,27,.12);outline:none}.product-expander p{margin:0;color:var(--green);font-weight:800}.product-expander h3{font-size:26px;margin:8px 0}.product-expander ul{padding-left:20px;color:#56605a}.product-expander a{font-weight:800;color:var(--green)}
.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(330px,1.1fr);gap:28px;align-items:center}.system-board{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.system-board article{min-height:220px;border-radius:8px;padding:20px;color:#fff;background:linear-gradient(155deg,#33413e,#698171)}.system-board span{display:inline-grid;place-items:center;width:54px;height:54px;border:1px solid rgba(255,255,255,.35);border-radius:50%;font-weight:900}.system-board strong{display:block;font-size:22px;margin:30px 0 8px}.system-board small{color:#dbe6df}
.acoustic-meter{display:grid;gap:12px}.acoustic-meter div{height:82px;border-radius:8px;border:1px solid var(--line);background:linear-gradient(90deg,var(--blue) calc(var(--value)*1%),#e9edf0 0);display:flex;align-items:center;padding-left:20px;color:#fff;font-weight:900}.acoustic-meter span{background:rgba(0,0,0,.22);padding:8px 12px;border-radius:7px}
.detail-layout{display:grid;grid-template-columns:minmax(320px,1fr) minmax(280px,420px);gap:22px}.wall-model{position:relative;min-height:430px;border-radius:8px;background:repeating-linear-gradient(90deg,#d8d5ca 0 10px,#c7c2b5 10px 20px);border:1px solid #bdb6a8;overflow:hidden}.wall-model:before{content:"";position:absolute;inset:50px 70px;background:linear-gradient(90deg,#f7f5ee 0 22%,#bdc8bd 22% 42%,#e7dfcf 42% 65%,#9e8064 65%);border:1px solid rgba(0,0,0,.12);box-shadow:inset 0 0 30px rgba(0,0,0,.12)}
.hotspot{position:absolute;width:42px;height:42px;border-radius:50%;border:2px solid #fff;background:var(--clay);color:#fff;font-weight:900;box-shadow:0 8px 18px rgba(0,0,0,.2);cursor:pointer;display:grid;place-items:center;transform:translate(-50%,-50%);z-index:2}.h1{left:calc(11% + 54.6px);top:50%}.h2{left:calc(32% + 25.2px);top:50%}.h3{left:calc(53.5% - 4.9px);top:50%}.h4{left:calc(82.5% - 45.5px);top:50%}.hotspot-panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px}
.texture-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.texture{position:relative;min-height:210px;border:0;border-radius:8px;overflow:hidden;cursor:pointer}.texture span{position:absolute;left:14px;bottom:14px;background:#fff;padding:8px 12px;border-radius:7px;font-weight:900}.fine{background:radial-gradient(#d6d1c5 1px,transparent 1px),#eee9dd;background-size:8px 8px}.linear{background:repeating-linear-gradient(90deg,#b9aa92 0 4px,#e7dfd0 4px 14px)}.rough{background:radial-gradient(circle at 20% 30%,#786958 0 6px,transparent 7px),radial-gradient(circle at 70% 60%,#b7a893 0 9px,transparent 10px),#d8cebb}.effect{background:conic-gradient(from 30deg,#cfc4ad,#7f917d,#d9d3c4,#9a714e,#cfc4ad)}
.color-tool{display:grid;grid-template-columns:minmax(280px,420px) 1fr;gap:24px;align-items:center}.mock-cube{height:330px;border-radius:8px;background:linear-gradient(135deg,#ddd7c9,#9a8265);transform:perspective(900px) rotateY(-16deg) rotateX(8deg);box-shadow:24px 28px 50px rgba(0,0,0,.18);display:grid;place-items:center;color:#fff;font-weight:900;text-shadow:0 2px 8px rgba(0,0,0,.3)}.search-box{display:grid;gap:8px;color:var(--muted);font-weight:700}.search-box input{padding:13px;border:1px solid var(--line);border-radius:7px}.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(86px,1fr));gap:10px;margin-top:16px}.swatches button{min-height:70px;border:1px solid rgba(0,0,0,.12);border-radius:7px;cursor:pointer;color:#fff;font-weight:900;text-shadow:0 1px 4px rgba(0,0,0,.4)}
.support-layout{display:grid;grid-template-columns:1fr 360px;gap:18px}.accordion{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}.accordion button{width:100%;display:flex;justify-content:space-between;padding:17px;border:0;border-bottom:1px solid var(--line);background:#fff;cursor:pointer;text-align:left;font-weight:800}.accordion div{display:none;padding:18px;border-bottom:1px solid var(--line)}.accordion div.open{display:block}.accordion a{font-weight:800;color:var(--green)}.inquiry{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px;display:grid;gap:10px}.inquiry input,.inquiry textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:7px}.inquiry textarea{min-height:120px;resize:vertical}
.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}.filter-row button{padding:10px 12px;border:1px dashed var(--line);border-radius:7px;color:#89928d;background:#f0eee8}.reference-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.reference-grid button{min-height:260px;text-align:left;border:0;border-radius:8px;padding:18px;color:#fff;cursor:pointer;background:linear-gradient(150deg,#34413d,#7e9277)}.reference-grid button:nth-child(2){background:linear-gradient(150deg,#42444a,#8e765d)}.reference-grid button:nth-child(3){background:linear-gradient(150deg,#32435c,#8da4a7)}.reference-grid span{display:block;color:#d9e6df}.reference-grid strong{display:block;font-size:25px;margin-top:120px}
.admin-shell{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}.admin-tabs{display:flex;gap:4px;padding:10px;border-bottom:1px solid var(--line);overflow:auto}.admin-tabs button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:10px 12px;cursor:pointer;white-space:nowrap}.admin-tabs button.active{background:var(--graphite);color:#fff}.admin-panel{min-height:260px;padding:22px}.admin-panel table{width:100%;border-collapse:collapse}.admin-panel th,.admin-panel td{padding:12px;border-bottom:1px solid var(--line);text-align:left}
.modal{position:fixed;inset:0;display:none;place-items:center;background:rgba(20,27,25,.58);z-index:40;padding:20px}.modal.is-open{display:grid}.modal>div{width:min(760px,100%);background:#fff;border-radius:8px;padding:24px;position:relative}.close{position:absolute;right:12px;top:12px;border:0;background:#eef2ee;border-radius:50%;width:38px;height:38px;cursor:pointer}.large-reference{height:300px;border-radius:8px;background:linear-gradient(140deg,#d8d0bf,#667d74);margin-top:16px}
@media (max-width: 900px){
  .nav-toggle{display:block}.nav{display:none;position:absolute;left:12px;right:12px;top:70px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;box-shadow:0 18px 40px rgba(0,0,0,.16)}.nav.open{display:grid;grid-template-columns:1fr}
  .hero,.split,.detail-layout,.color-tool,.support-layout{grid-template-columns:1fr}.hero{min-height:auto}.three-grid,.product-expander,.texture-grid,.reference-grid,.cert-strip,.system-board{grid-template-columns:1fr}.hero-visual img{aspect-ratio:16/11}.section{padding-top:44px;padding-bottom:44px}.brand{min-width:auto}.brand small{display:none}
}
@media (max-width: 520px){
  .hero h1{font-size:34px}.site-header{padding:12px}.hero{padding-left:14px;padding-right:14px}.section{padding-left:14px;padding-right:14px}.trust-row span{font-size:12px}.mock-cube{height:240px}.wall-model{min-height:330px}
}