:root{
  --navy:#0f1f3d; --navy-2:#1d3a6e; --accent:#ff6a00; --accent-2:#ffd23f;
  --bg:#ffffff; --bg-alt:#f5f7fa; --ink:#1a2233; --muted:#5b6577; --line:#e3e8ef;
  --maxw:1140px; --radius:14px; --shadow:0 8px 30px rgba(15,31,61,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%}
h1,h2,h3,h4{line-height:1.2;color:var(--navy);margin:0 0 .5em}
h1{font-size:clamp(1.9rem,4vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.muted{color:var(--muted)}
.small{font-size:.9rem}
.center{text-align:center}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:1.15rem}
.brand:hover{text-decoration:none}
.logo-mark{width:34px;height:34px}
.nav{list-style:none;display:flex;gap:6px;margin:0;padding:0}
.nav a{display:block;padding:8px 14px;border-radius:8px;color:var(--navy);font-weight:600}
.nav a:hover{background:var(--bg-alt);text-decoration:none}
.nav a.active{color:var(--accent)}
.nav-toggle{display:none;background:none;border:0;font-size:1.5rem;color:var(--navy);cursor:pointer}

/* Hero */
.hero{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:64px 20px 72px}
.hero h1{color:#fff}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-weight:700;color:var(--accent-2);font-size:.85rem;margin:0 0 12px}
.lead{font-size:1.15rem;color:#dbe4f3;max-width:48ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin:22px 0 18px}
.hero-badges{list-style:none;display:flex;flex-wrap:wrap;gap:14px 22px;padding:0;margin:8px 0 0;color:#cdd8ea;font-weight:600}
.hero-badges .ico{width:18px;height:18px;color:var(--accent-2);vertical-align:-3px;margin-right:6px}
.hero-media{position:relative;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);aspect-ratio:6/4}
.hero-art{width:100%;height:100%;display:block}

/* Buttons */
.btn{display:inline-block;padding:13px 26px;border-radius:10px;font-weight:700;border:2px solid transparent;cursor:pointer;transition:.15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#e85e00}
.btn-ghost{background:transparent;color:var(--navy);border-color:rgba(15,31,61,.35)}
.hero .btn-ghost,.cat-hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{border-color:currentColor;background:rgba(15,31,61,.05)}
.hero .btn-ghost:hover,.cat-hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}

/* Sections */
.section{padding:64px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:680px;margin:0 auto 40px}
.section-head p{color:var(--muted);font-size:1.08rem}

/* Category grid */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:block;color:var(--ink);transition:.18s;box-shadow:0 2px 10px rgba(15,31,61,.04)}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);text-decoration:none;border-color:#cdd8ea}
.cat-ico{width:96px;height:96px;margin-bottom:14px}
.cat-art{width:100%;height:100%}
/* Real product photos (when cat_visual renders <img> instead of SVG) crop cleanly. */
img.cat-art{object-fit:cover;object-position:center;display:block}
.cat-hero-art img.cat-art{width:100%;height:220px;border-radius:12px}
.cat-card img.cat-art{width:100%;height:180px;border-radius:12px;margin-bottom:16px}
.cat-card h3{margin:0 0 6px}
.cat-card p{color:var(--muted);margin:0 0 10px;font-size:.95rem}
.cat-more{color:var(--accent);font-weight:700;font-size:.92rem}

/* Features */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 2px 10px rgba(15,31,61,.04)}
.feature-ico{width:48px;height:48px;color:var(--accent);margin-bottom:10px}
.ico{width:100%;height:100%}
.feature h3{margin:0 0 8px}
.feature p{color:var(--muted);margin:0;font-size:.95rem}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px;text-align:center}
.stat{background:var(--navy);color:#fff;border-radius:var(--radius);padding:24px 12px}
.stat strong{display:block;font-size:2rem;color:var(--accent-2)}
.stat span{color:#cdd8ea;font-size:.9rem}

/* Steps */
.steps{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;padding:0;margin:0}
.steps li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.step-n{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;background:var(--accent);color:#fff;border-radius:50%;font-weight:800;margin-bottom:10px}
.steps h3{font-size:1.02rem;margin:0 0 6px}
.steps p{color:var(--muted);margin:0;font-size:.9rem}

/* Testimonials */
.t-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tcard{background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--radius);padding:24px;margin:0;font-size:.98rem;box-shadow:0 2px 10px rgba(15,31,61,.04)}
.tcard p{margin:0;color:#2a3346}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:60px 0}
.cta-inner{text-align:center;max-width:680px;margin:0 auto}
.cta-inner h2{color:#fff}
.cta-inner p{color:#dbe4f3;font-size:1.1rem}

/* Breadcrumb */
.breadcrumb{font-size:.9rem;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}

/* Products */
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.prod-card{display:flex;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;color:var(--ink);box-shadow:0 2px 10px rgba(15,31,61,.04)}
.prod-card:hover{text-decoration:none;transform:translateY(-3px);box-shadow:var(--shadow)}
.prod-ico{width:88px;height:88px;flex:none}

/* About */
.about-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:start}
.check-list{list-style:none;padding:0;margin:18px 0}
.check-list li{position:relative;padding-left:30px;margin-bottom:10px}
.check-list .ico{position:absolute;left:0;top:2px;width:20px;height:20px;color:var(--accent)}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.about-stats .stat{background:var(--bg-alt);color:var(--navy);border:1px solid var(--line)}
.about-stats .stat strong{color:var(--accent)}
.about-stats .stat span{color:var(--muted)}
.cert-block{margin-top:46px;text-align:center}
.cert-list{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:12px;padding:0;margin:20px 0 0}
.cert-list li{background:#fff;border:1px solid var(--line);border-radius:30px;padding:9px 20px;font-weight:700;color:var(--navy)}

/* Category page */
.cat-hero{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:center;background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;border-radius:18px;padding:36px;margin-bottom:44px}
.cat-hero h1{color:#fff}
.cat-hero .lead{color:#dbe4f3}
.cat-hero-art{background:rgba(255,255,255,.06);border-radius:14px;padding:18px;display:flex;align-items:center;justify-content:center}
.cat-hero-art .cat-art{width:200px;height:200px}
.cat-detail{display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:start}
.spec-list{list-style:none;padding:0;margin:0 0 18px}
.spec-list li{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.spec-list span{color:var(--muted)}
.cat-spec{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.related{margin-top:50px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:0 2px 10px rgba(15,31,61,.04)}
.contact-primary{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;text-align:center}
.contact-primary h2{color:#fff}
.contact-ico{width:54px;height:54px;color:var(--accent-2);margin:0 auto 10px}
.email-big{display:inline-block;font-size:1.25rem;font-weight:800;color:var(--accent-2);word-break:break-all;margin:8px 0 18px}
.contact-primary .muted{color:#cdd8ea}
.email-link{font-weight:700;word-break:break-all}
.faq-block{margin-top:48px}
.faq{border-bottom:1px solid var(--line);padding:16px 0}
.faq h3{margin:0 0 6px;font-size:1.05rem}
.faq p{margin:0;color:var(--muted)}

/* Footer */
.site-footer{background:var(--navy);color:#cdd8ea;padding:54px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:30px}
.site-footer .brand{color:#fff;margin-bottom:14px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#cdd8ea}
.footer-links a:hover{color:var(--accent-2)}
.site-footer h4{color:#fff;margin:0 0 14px;font-size:1rem}
.email-link{color:var(--accent-2)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:18px;font-size:.88rem}

/* Factory showcase */
.factory-showcase .section-head{margin-bottom:26px}
.factory-fig{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.factory-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:10px;padding:10px}
.factory-img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}
.factory-fig figcaption{padding:14px 18px;color:var(--muted);font-size:.92rem;border-top:1px solid var(--line)}
.factory-points{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.factory-points .fp{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 2px 10px rgba(15,31,61,.04)}
.fp-ico{display:inline-flex;width:44px;height:44px;color:var(--accent);margin-bottom:10px}
.fp-ico .ico{width:100%;height:100%}
.factory-points h3{margin:0 0 8px;font-size:1.05rem}
.factory-points p{color:var(--muted);margin:0;font-size:.94rem}

/* Responsive */
@media(max-width:900px){
  .hero-inner,.cat-hero,.cat-detail,.about-grid,.contact-grid{grid-template-columns:1fr}
  .cat-grid,.feature-grid,.t-grid,.prod-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-media{order:-1}
}
@media(max-width:600px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:10px 20px;gap:2px}
  .nav.open{display:flex}
  .cat-grid,.feature-grid,.t-grid,.prod-grid,.steps,.stats,.footer-grid{grid-template-columns:1fr}
  .section{padding:46px 0}
}