:root{
  --green:#1a7d4f;
  --green-d:#14613d;
  --green-l:#e8f4ee;
  --accent:#2e9e63;
  --ink:#1f2a24;
  --muted:#5d6b63;
  --line:#e3ebe6;
  --bg:#ffffff;
  --radius:16px;
  --shadow:0 6px 22px rgba(20,97,61,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
.btn{
  display:inline-block;background:var(--green);color:#fff;padding:12px 26px;
  border-radius:999px;font-weight:600;transition:.2s;box-shadow:var(--shadow);
}
.btn:hover{background:var(--green-d);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--green);border:1.5px solid var(--green)}
.btn-ghost:hover{background:var(--green-l)}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--green-d)}
.logo .en{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:1px}
.logo-mark{
  width:38px;height:38px;border-radius:10px;background:var(--green);color:#fff;
  display:grid;place-items:center;font-size:18px;
}
.nav-links{display:flex;gap:30px;font-weight:500}
.nav-links a{position:relative;padding:6px 0;color:var(--ink)}
.nav-links a:hover,.nav-links a.active{color:var(--green)}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2.5px;
  background:var(--green);border-radius:2px;
}
.nav-toggle{display:none;font-size:26px;background:none;border:none;color:var(--green-d)}

/* Hero */
.hero{
  background:linear-gradient(135deg,#14613d 0%,#1a7d4f 55%,#2e9e63 100%);
  color:#fff;padding:84px 0 76px;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;
  background:rgba(255,255,255,.08);border-radius:50%;
}
.hero h1{font-size:40px;line-height:1.25;margin-bottom:18px;font-weight:800}
.hero p{font-size:18px;opacity:.92;max-width:560px;margin-bottom:30px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.7)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.12)}

/* Sections */
.section{padding:64px 0}
.section.alt{background:var(--green-l)}
.sec-head{text-align:center;margin-bottom:42px}
.sec-head h2{font-size:30px;color:var(--green-d);margin-bottom:10px}
.sec-head p{color:var(--muted);max-width:620px;margin:0 auto}

/* Advantages */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 22px;text-align:center;box-shadow:var(--shadow);
}
.adv-card .ic{font-size:34px;margin-bottom:12px}
.adv-card h3{font-size:18px;margin-bottom:8px;color:var(--green-d)}
.adv-card p{color:var(--muted);font-size:14px}

/* Categories */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cat-card{
  border-radius:var(--radius);overflow:hidden;position:relative;min-height:200px;
  display:flex;align-items:flex-end;color:#fff;box-shadow:var(--shadow);
  background:linear-gradient(160deg,var(--green) 0%,var(--green-d) 100%);
}
.cat-card .body{padding:24px}
.cat-card h3{font-size:22px;margin-bottom:6px}
.cat-card p{opacity:.9;font-size:14px}
.cat-card .count{
  position:absolute;top:18px;right:20px;background:rgba(255,255,255,.18);
  padding:4px 12px;border-radius:999px;font-size:13px;
}

/* Product grid */
.filter-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:34px}
.filter-bar button{
  border:1.5px solid var(--line);background:#fff;color:var(--muted);
  padding:8px 20px;border-radius:999px;cursor:pointer;font-weight:600;transition:.2s;
}
.filter-bar button.active,.filter-bar button:hover{border-color:var(--green);color:var(--green);background:var(--green-l)}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.p-card{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:#fff;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column;
}
.p-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(20,97,61,.14)}
.p-thumb{aspect-ratio:1;background:var(--green-l);display:grid;place-items:center;overflow:hidden}
.p-thumb img{width:100%;height:100%;object-fit:contain}
.p-thumb .ph{font-size:54px;color:var(--green)}
.p-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.p-body .cat{font-size:12px;color:var(--accent);font-weight:700}
.p-body h3{font-size:17px;line-height:1.4}
.p-body .meta{font-size:13px;color:var(--muted);margin-top:auto}
.p-body .moq{color:var(--green-d);font-weight:600}

/* Product detail */
.pd-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.pd-gallery .main{
  border-radius:var(--radius);overflow:hidden;background:var(--green-l);
  aspect-ratio:1;display:grid;place-items:center;border:1px solid var(--line);
}
.pd-gallery .main img{width:100%;height:100%;object-fit:contain}
.pd-gallery .main .ph{font-size:80px;color:var(--green)}
.pd-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.pd-thumbs img{width:72px;height:72px;border-radius:12px;object-fit:contain;background:var(--green-l);border:1.5px solid var(--line);cursor:pointer}
.pd-thumbs img.active{border-color:var(--green)}
.pd-info h1{font-size:28px;color:var(--green-d);margin-bottom:14px}
.pd-info .desc{color:var(--muted);margin-bottom:22px}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:24px}
.spec-table th,.spec-table td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);font-size:15px}
.spec-table th{color:var(--muted);font-weight:600;width:110px}
.spec-table td{font-weight:600}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px}
.breadcrumb a:hover{color:var(--green)}

/* About / Contact */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-grid img{border-radius:var(--radius);box-shadow:var(--shadow)}
.about-text h2{font-size:28px;color:var(--green-d);margin-bottom:16px}
.about-text p{color:var(--muted);margin-bottom:14px}
.cert-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.cert-list span{background:var(--green-l);color:var(--green-d);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info li{list-style:none;padding:14px 0;border-bottom:1px solid var(--line);display:flex;gap:12px}
.contact-info .ic{font-size:22px}
.contact-info b{color:var(--green-d)}
.info-box{background:var(--green-l);border-radius:var(--radius);padding:28px}
.info-box h3{color:var(--green-d);margin-bottom:14px}
.info-box p{color:var(--muted);margin-bottom:8px}

/* Footer */
.site-footer{background:var(--green-d);color:#eaf5ef;padding:48px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px}
.footer-grid h4{font-size:16px;margin-bottom:14px;color:#fff}
.footer-grid p,.footer-grid a{color:#cfe6da;font-size:14px;line-height:1.9}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:18px;font-size:13px;color:#bcd7cb;text-align:center}

/* Responsive */
@media(max-width:900px){
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:1fr}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .pd-wrap,.about-grid,.contact-grid{grid-template-columns:1fr}
  .nav-links{
    position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;
    gap:0;padding:10px 20px;border-bottom:1px solid var(--line);display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .hero h1{font-size:30px}
}
@media(max-width:560px){
  .adv-grid,.product-grid{grid-template-columns:1fr}
  .hero{padding:60px 0 50px}
}