:root{
  --ink:#1f2933; --sub:#54616e; --line:#e6eaed; --bg:#f6f8f7;
  --brand:#0c6e4f; --brand-d:#0a5c42; --brand2:#0e7c86; --accent:#c08a16; --accent-d:#a4760a;
  --white:#fff; --soft:#eef3f1;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",-apple-system,Inter,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:15.5px}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
.container.narrow{max-width:880px}
a{color:var(--brand2);text-decoration:none}
.muted{color:var(--sub)}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;flex-direction:column;line-height:1.15}
.brand-en{font-weight:800;color:var(--brand);font-size:16px;letter-spacing:.4px}
.brand-sub{font-size:10.5px;color:var(--sub);letter-spacing:.2px}
.site-nav{display:flex;align-items:center;gap:20px}
.site-nav a{color:var(--ink);font-size:14.5px;font-weight:500}
.site-nav a:hover{color:var(--brand)}
.nav-cta{background:var(--brand);color:#fff!important;padding:9px 18px;border-radius:9px;font-weight:600}
.nav-cta:hover{background:var(--brand-d)}
.nav-toggle{display:none;background:none;border:0;font-size:22px;cursor:pointer;color:var(--brand)}

/* Hero */
.hero{padding:130px 0 140px;background:linear-gradient(135deg,#0b6e4f,#0e7c86);color:#fff;text-align:center;position:relative}
.hero-tag{letter-spacing:3px;font-size:13px;opacity:.9;margin:0 0 14px;text-transform:uppercase;font-weight:600}
.hero h1{font-size:44px;margin:0 0 18px;font-weight:800;letter-spacing:.5px;max-width:900px;margin-left:auto;margin-right:auto;text-shadow:0 2px 18px rgba(0,0,0,.25)}
.hero-sub{font-size:17px;max-width:700px;margin:0 auto 30px;opacity:.95}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Buttons */
.btn{display:inline-block;padding:13px 30px;border-radius:10px;font-weight:600;font-size:15px;cursor:pointer;border:2px solid transparent;transition:.15s}
.btn-primary{background:var(--accent);color:#1a1205;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-d)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.75)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}
.btn-submit{margin-top:18px;width:100%;max-width:340px}

/* Sections */
.section{padding:78px 0}
.section-alt{background:var(--soft)}
.section-title{font-size:30px;color:var(--brand);margin:0 0 8px;text-align:center;font-weight:800;position:relative;padding-bottom:12px}
.section-title::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:56px;height:3px;background:var(--accent);border-radius:2px}
.section-sub{text-align:center;color:var(--sub);max-width:700px;margin:14px auto 40px}

/* About */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:46px;align-items:center}
.about-text p{margin:0 0 16px;color:#374049}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;box-shadow:0 4px 14px rgba(11,110,79,.05)}
.stat-value{font-size:32px;font-weight:800;color:var(--brand)}
.stat-label{color:var(--sub);font-size:13.5px;margin-top:4px}

/* Company profile table */
.profile-table{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;max-width:920px;margin:0 auto}
.prow{display:grid;grid-template-columns:230px 1fr;border-top:1px solid var(--line)}
.prow:first-child{border-top:0}
.pk{background:#f4f8f6;color:var(--brand-d);font-weight:700;font-size:14px;padding:14px 18px;border-right:1px solid var(--line)}
.pv{padding:14px 18px;color:#374049;font-size:14.5px}

/* Collections */
.grid-collections{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.col-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.2s;box-shadow:0 4px 16px rgba(0,0,0,.04)}
.col-card:hover{transform:translateY(-5px);box-shadow:0 14px 34px rgba(11,110,79,.14);border-color:#bfe0d4}
.col-img{aspect-ratio:16/10;overflow:hidden;background:var(--soft)}
.col-img img{width:100%;height:100%;object-fit:cover;transition:.3s}
.col-card:hover .col-img img{transform:scale(1.04)}
.col-body{padding:22px 22px 24px}
.col-body h3{margin:0 0 8px;color:var(--brand-d);font-size:19px}
.col-body p{margin:0 0 14px;color:var(--sub);font-size:14.5px}
.col-feats{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.col-feats li{background:var(--soft);color:var(--brand-d);font-size:12.5px;padding:5px 12px;border-radius:20px;font-weight:600}

/* Materials */
.materials-wrap{display:grid;grid-template-columns:0.85fr 1.15fr;gap:40px;align-items:center}
.mat-img{border-radius:16px;overflow:hidden;box-shadow:0 8px 26px rgba(0,0,0,.08)}
.mat-img img{width:100%;height:100%;display:block;object-fit:cover}
.knowledge-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.kpoint{background:#fff;border-left:4px solid var(--brand);border-radius:10px;padding:16px 18px}
.kpoint h4{margin:0 0 6px;color:var(--brand-d);font-size:15.5px}
.kpoint p{margin:0;color:var(--sub);font-size:13.5px}

/* Process */
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 22px;position:relative;box-shadow:0 4px 14px rgba(0,0,0,.04)}
.step-n{font-size:30px;font-weight:800;color:var(--accent);opacity:.85;margin-bottom:6px}
.step h4{margin:0 0 8px;color:var(--brand-d);font-size:17px}
.step p{margin:0;color:var(--sub);font-size:14px}

/* Cards (why us) */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 22px;transition:.18s}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(11,110,79,.12);border-color:#bfe0d4}
.card-icon{font-size:30px;margin-bottom:10px}
.card h3{margin:0 0 8px;color:var(--brand-d);font-size:18px}
.card p{margin:0;color:var(--sub);font-size:14px}

/* Customize form */
.custom-form{background:#fff;border:1px solid var(--line);border-radius:16px;padding:32px;max-width:940px;margin:0 auto;box-shadow:0 6px 20px rgba(0,0,0,.04)}
.form-cols{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.form-group-title{font-size:17px;color:var(--brand);border-left:4px solid var(--accent);padding-left:10px;margin:0 0 16px}
.field{margin-bottom:14px}
.fld-label{display:block;font-size:13.5px;color:var(--sub);margin-bottom:5px;font-weight:600}
.req{color:var(--accent)}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14.5px;font-family:inherit;background:#fcfdfd}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand2);box-shadow:0 0 0 3px rgba(14,124,134,.12)}
.field textarea{resize:vertical}
.form-msg{margin:14px 0 0;font-size:14px;min-height:20px}
.form-msg.ok{color:var(--brand)}
.form-msg.err{color:#b42318}

/* Configurator */
.configurator{max-width:940px;margin:0 auto}
.cfg-lines{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:26px}
.cfg-line{position:relative;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:18px 18px 16px;margin-top:8px;cursor:pointer;transition:.18s}
.cfg-line:hover{box-shadow:0 6px 18px rgba(0,0,0,.06);border-color:var(--brand2)}
.cfg-line.active{border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,124,134,.15)}
.cfg-line-tag{position:absolute;top:-10px;left:16px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;padding:2px 10px;border-radius:20px;letter-spacing:.3px}
.cfg-line b{display:block;color:var(--brand);font-size:17px;margin-bottom:6px}
.cfg-line p{margin:0;font-size:13.5px;color:var(--sub);line-height:1.5}
.cfg-progress{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px;justify-content:center}
.cfg-dot{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:30px;padding:7px 14px;font-size:13px;color:var(--sub);cursor:pointer;transition:.18s}
.cfg-dot.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.cfg-dot-no{display:inline-flex;width:20px;height:20px;align-items:center;justify-content:center;background:rgba(0,0,0,.08);border-radius:50%;font-size:12px;font-weight:700}
.cfg-dot.active .cfg-dot-no{background:rgba(255,255,255,.25)}
.cfg-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 4px 16px rgba(0,0,0,.04)}
.cfg-step-title{display:flex;align-items:center;gap:10px;font-size:19px;color:var(--brand);margin:0 0 18px}
.cfg-step-no{display:inline-flex;width:26px;height:26px;align-items:center;justify-content:center;background:var(--accent);color:#fff;border-radius:50%;font-size:14px;font-weight:800}
.cfg-step-body{display:flex;flex-wrap:wrap;gap:12px}
.cfg-choice{background:#f7fafa;border:1.5px solid var(--line);border-radius:10px;padding:12px 18px;font-size:14.5px;color:var(--ink);cursor:pointer;transition:.16s;font-family:inherit}
.cfg-choice:hover{border-color:var(--brand2);background:#fff}
.cfg-choice.selected{background:var(--brand);color:#fff;border-color:var(--brand)}
.fabric-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;width:100%}
.fabric-card{text-align:left;background:#f7fafa;border:1.5px solid var(--line);border-radius:12px;padding:16px;cursor:pointer;transition:.16s;font-family:inherit}
.fabric-card:hover{border-color:var(--brand2);transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,0,0,.07)}
.fabric-card.selected{border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,124,134,.15);background:#fff}
.fabric-card b{display:block;color:var(--brand);font-size:15px;margin-bottom:6px}
.fabric-card p{margin:0;font-size:13px;color:var(--sub);line-height:1.5}
.dims-row{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap}
.dims-field{display:flex;flex-direction:column;font-size:13px;color:var(--sub);font-weight:600;gap:5px}
.dims-field input{width:90px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit}
.dims-x{font-size:18px;color:var(--sub);padding-bottom:10px}
.unit-toggle{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}
.unit-toggle button{border:0;background:#f7fafa;padding:10px 16px;font-size:14px;cursor:pointer;font-family:inherit;color:var(--sub)}
.unit-toggle button.active{background:var(--brand);color:#fff}
.qty-row{display:flex;gap:18px;flex-wrap:wrap}
.qty-field{display:flex;flex-direction:column;font-size:13px;color:var(--sub);font-weight:600;gap:5px}
.qty-field input,.qty-field select{width:160px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit}
.cfg-nav{display:flex;justify-content:space-between;margin-top:22px}
.cfg-summary{background:linear-gradient(135deg,#0b6e4f,#0e7c86);color:#fff;border-radius:16px;padding:24px;margin-top:24px}
.cfg-summary-title{margin:0 0 14px;font-size:18px}
.cfg-summary-list{list-style:none;margin:0 0 16px;padding:0}
.cfg-summary-list li{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.18);font-size:14.5px}
.cfg-summary-list li span{opacity:.8}
.cfg-summary-list li.empty{justify-content:flex-start;opacity:.7;font-style:italic}
.cfg-price{font-size:17px;margin-bottom:4px}
.cfg-price b{font-size:20px}
.cfg-price-note{font-size:12.5px;opacity:.8;margin:4px 0 0}
.cfg-contact{margin-top:24px}
.cfg-contact .field{margin-bottom:14px}
.cfg-contact input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14.5px;font-family:inherit}
@media(max-width:640px){ .cfg-lines{grid-template-columns:1fr} .cfg-progress{justify-content:flex-start} }

/* Gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.gitem{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s}
.gitem:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.1)}
.gitem img{width:100%;height:220px;object-fit:cover;display:block}
.gitem figcaption{padding:11px 13px;font-size:13.5px;color:var(--sub)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  background:none;border:0;cursor:pointer;padding:18px 20px;font-size:16px;font-weight:600;color:var(--brand-d);text-align:left;font-family:inherit}
.faq-q:hover{color:var(--brand)}
.faq-ic{font-size:22px;color:var(--accent);flex-shrink:0;line-height:1}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{margin:0;padding:0 20px 18px;color:var(--sub);font-size:14.5px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:start}
.contact-list{list-style:none;padding:0;margin:20px 0 0}
.contact-list li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:15px}
.contact-list li span{color:var(--sub)}
.contact-card{background:linear-gradient(135deg,#0b6e4f,#0e7c86);color:#fff;border-radius:16px;padding:30px}
.cc-name{font-size:22px;font-weight:800}
.cc-en{font-size:13px;opacity:.85;margin-top:4px}
.cc-line{margin-top:14px;font-size:14px;opacity:.92}

/* Footer */
.site-footer{background:#0a3a2c;color:#cfe6dd;padding:32px 0;text-align:center;font-size:13.5px}
.site-footer .muted{color:#9fc4b8}

/* Back to top */
.to-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;background:var(--brand);color:#fff;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;box-shadow:0 6px 18px rgba(0,0,0,.2);
  opacity:.85;transition:.15s;z-index:40}
.to-top:hover{opacity:1;background:var(--brand-d)}

/* Responsive */
@media(max-width:900px){
  .grid-collections{grid-template-columns:1fr}
  .materials-wrap{grid-template-columns:1fr;gap:26px}
  .process-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
  .site-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:10px 20px;border-bottom:1px solid var(--line)}
  .site-nav.open{display:flex}
  .site-nav a{padding:10px 0}
  .nav-toggle{display:block}
  .about-grid,.form-cols,.contact-grid{grid-template-columns:1fr}
  .prow{grid-template-columns:1fr}
  .pk{border-right:0;border-bottom:1px solid var(--line)}
  .hero h1{font-size:32px}
  .hero{padding:95px 0 105px}
  .knowledge-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .process-grid{grid-template-columns:1fr}
}

/* ---- Language switcher ---- */
.lang-switch{display:flex;gap:4px;margin:0 14px;align-items:center}
.lang-btn{border:1px solid var(--line);background:transparent;color:var(--sub);font-size:12px;padding:4px 9px;border-radius:20px;cursor:pointer;transition:.15s}
.lang-btn:hover{border-color:var(--brand);color:var(--brand)}
.lang-btn.active{background:var(--brand);border-color:var(--brand);color:#fff}
@media(max-width:820px){.lang-switch{margin:8px 0 0}}

/* ---- Collection landing pages ---- */
/* Homepage collection card as a link */
.col-card-link{display:block;text-decoration:none;color:inherit}
.col-card-link:hover .col-card{transform:translateY(-5px);box-shadow:0 14px 34px rgba(11,110,79,.14);border-color:#bfe0d4}
.col-more{display:inline-block;margin-top:14px;color:var(--brand);font-weight:700;font-size:14px;letter-spacing:.2px}
.col-card-link:hover .col-more{color:var(--brand-d)}

/* Collection hero (image background variant) */
.col-hero{display:flex;align-items:center;min-height:360px;background-color:#0a3a2c}
.col-hero .hero-inner{position:relative;z-index:1;max-width:900px}

/* Collection intro block */
.col-intro{font-size:16px;color:#374049;line-height:1.92}
.col-intro p{margin:0 0 16px}
.col-intro p:last-child{margin-bottom:0}

/* Collection CTA */
.col-cta{text-align:center;margin-top:26px}

/* Related collections grid */
.rel-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.rel-link{display:flex;align-items:center;justify-content:center;text-align:center;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 18px;
  color:var(--brand-d);font-weight:700;font-size:16px;transition:.18s}
.rel-link:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(11,110,79,.12);border-color:#bfe0d4;color:var(--brand)}

/* ---- Spec table ---- */
.spec-wrap{margin-top:30px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.spec-table{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.spec-cap{caption-side:top;text-align:left;padding:0 0 12px;font-size:13px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:var(--brand-d)}
.spec-table th,.spec-table td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table tbody tr:last-child th,.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table th{width:32%;min-width:132px;font-weight:700;color:#15181c;background:#f6faf8}
.spec-table td{color:#374049;line-height:1.8}
@media(max-width:820px){
  .spec-table th,.spec-table td{padding:12px 14px;font-size:14px}
  .spec-table th{width:38%;min-width:110px}
}
@media(max-width:820px){ .col-hero{min-height:300px;padding:70px 0 80px} }