:root{
  --ink:#16233a; --ink2:#4a5670; --line:#e4e8f0;
  --pri:#16324f; --acc:#f0a500; --acc2:#0f9b8e;
  --bg:#ffffff; --soft:#f6f8fb; --radius:14px;
  --shadow:0 6px 24px rgba(22,50,79,.08); --shadow2:0 14px 44px rgba(22,50,79,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.65 "Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1180px,92%);margin:0 auto}

/* header */
.hd{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand img{height:36px;width:auto}
.brand span{display:flex;flex-direction:column;line-height:1.15}
.brand b{font-size:17px;letter-spacing:.2px;color:var(--pri)}
.brand i{font-size:10.5px;font-style:normal;color:var(--ink2);letter-spacing:1.3px;text-transform:uppercase}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:9px 13px;border-radius:9px;font-size:13.5px;font-weight:600;letter-spacing:.5px;color:var(--ink2);transition:.18s}
.nav a:hover{background:var(--soft);color:var(--pri)}
.nav a.on{color:var(--pri);background:#eef3f9}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px;gap:4px;flex-direction:column}
.burger span{display:block;width:22px;height:2px;background:var(--pri);border-radius:2px}

/* hero */
.hero{position:relative;background:linear-gradient(135deg,#16324f 0%,#1d4a6e 55%,#0f9b8e 100%);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 82% 18%,rgba(240,165,0,.30),transparent 46%),
             radial-gradient(circle at 10% 88%,rgba(15,155,142,.34),transparent 48%)}
.hero-in{position:relative;z-index:2;padding:92px 0 100px;max-width:760px}
.eyebrow{display:inline-block;font-size:11.5px;letter-spacing:2.6px;text-transform:uppercase;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);padding:7px 15px;border-radius:99px;margin-bottom:22px}
.hero h1{margin:0 0 18px;font-size:clamp(30px,5vw,52px);line-height:1.14;font-weight:800;letter-spacing:-.5px}
.hero p{margin:0 0 30px;font-size:17.5px;color:rgba(255,255,255,.9);max-width:640px}
.btns{display:flex;gap:13px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 27px;border-radius:10px;font-weight:700;font-size:15px;transition:.2s;border:1.5px solid transparent}
.btn-a{background:var(--acc);color:#241a00}
.btn-a:hover{background:#ffb81a;transform:translateY(-2px);box-shadow:0 10px 26px rgba(240,165,0,.34)}
.btn-o{border-color:rgba(255,255,255,.5);color:#fff}
.btn-o:hover{background:rgba(255,255,255,.13);border-color:#fff;transform:translateY(-2px)}
.btn-p{background:var(--pri);color:#fff}
.btn-p:hover{background:#1d4a6e;transform:translateY(-2px);box-shadow:var(--shadow2)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{background:var(--bg);padding:30px 18px;text-align:center}
.stat b{display:block;font-size:29px;color:var(--pri);font-weight:800;letter-spacing:-.5px}
.stat span{font-size:12.5px;color:var(--ink2);letter-spacing:.6px;text-transform:uppercase}

/* section */
.sec{padding:76px 0}
.sec.soft{background:var(--soft)}
.sec-h{text-align:center;max-width:660px;margin:0 auto 46px}
.sec-h span{color:var(--acc2);font-size:12px;font-weight:700;letter-spacing:2.6px;text-transform:uppercase}
.sec-h h2{margin:11px 0 13px;font-size:clamp(25px,3.4vw,36px);color:var(--pri);font-weight:800;letter-spacing:-.4px}
.sec-h p{margin:0;color:var(--ink2);font-size:16px}

/* cat grid */
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(212px,1fr));gap:20px}
.cat{position:relative;border-radius:var(--radius);overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow);transition:.24s;display:block}
.cat:hover{transform:translateY(-5px);box-shadow:var(--shadow2)}
.cat-img{aspect-ratio:4/3;overflow:hidden;background:var(--soft)}
.cat-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.cat:hover .cat-img img{transform:scale(1.07)}
.cat-t{padding:14px 16px 16px}
.cat-t b{display:block;font-size:14.5px;color:var(--pri);line-height:1.35}
.cat-t i{font-style:normal;font-size:12px;color:var(--ink2)}

/* product grid */
.filters{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-bottom:36px}
.fbtn{padding:9px 17px;border-radius:99px;border:1.5px solid var(--line);background:#fff;
  font-size:13.5px;font-weight:600;color:var(--ink2);cursor:pointer;transition:.18s}
.fbtn:hover{border-color:var(--pri);color:var(--pri)}
.fbtn.on{background:var(--pri);border-color:var(--pri);color:#fff}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;
  box-shadow:var(--shadow);cursor:pointer;transition:.22s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow2);border-color:#c9d6e6}
.card-img{aspect-ratio:1/1;background:var(--soft);overflow:hidden;display:flex;align-items:center;justify-content:center;padding:10px}
.card-img img{width:100%;height:100%;object-fit:contain;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-b{padding:12px 14px 15px;border-top:1px solid var(--line)}
.card-b b{display:block;font-size:13.8px;color:var(--pri);line-height:1.4;min-height:2.6em}
.card-b i{font-style:normal;font-size:11.5px;color:var(--ink2);letter-spacing:.4px}
.count{text-align:center;color:var(--ink2);font-size:14px;margin:26px 0 0}

/* about / text blocks */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.split.top{align-items:start}
.prose p{color:var(--ink2);margin:0 0 15px}
.prose h3{color:var(--pri);font-size:22px;margin:0 0 16px}
.prose ul{color:var(--ink2);padding-left:20px;margin:0 0 15px}
.prose li{margin-bottom:7px}
.frame{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow2);background:var(--soft)}
.frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.diffs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.diff{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.24s}
.diff:hover{transform:translateY(-5px);box-shadow:var(--shadow2)}
.diff img{aspect-ratio:16/10;object-fit:cover;width:100%}
.diff-b{padding:20px}
.diff-b h4{margin:0 0 9px;color:var(--pri);font-size:17px}
.diff-b p{margin:0;color:var(--ink2);font-size:14.3px}

/* contact */
.cinfo{display:grid;gap:16px}
.ci{display:flex;gap:15px;padding:19px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
.ci-ic{flex:0 0 44px;height:44px;border-radius:11px;background:#eef3f9;display:flex;align-items:center;justify-content:center}
.ci-ic svg{width:20px;height:20px;stroke:var(--pri);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.ci h5{margin:0 0 5px;font-size:14.5px;color:var(--pri)}
.ci p,.ci a{margin:0;color:var(--ink2);font-size:14.3px;word-break:break-word}
.ci a:hover{color:var(--acc2)}
form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
label{display:block;font-size:13px;font-weight:700;color:var(--pri);margin:0 0 7px}
input,textarea,select{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:9px;
  font:inherit;font-size:14.5px;color:var(--ink);background:#fff;margin-bottom:16px;transition:.16s}
input:focus,textarea:focus,select:focus{outline:0;border-color:var(--acc2);box-shadow:0 0 0 3px rgba(15,155,142,.13)}
textarea{min-height:118px;resize:vertical}
.note{font-size:12.5px;color:var(--ink2);margin:0}

/* cta */
.cta{background:linear-gradient(135deg,#16324f,#1d4a6e);color:#fff;border-radius:var(--radius);
  padding:52px 44px;text-align:center;box-shadow:var(--shadow2)}
.cta h2{margin:0 0 12px;font-size:clamp(23px,3vw,31px);font-weight:800}
.cta p{margin:0 0 26px;color:rgba(255,255,255,.88)}

/* breadcrumb / page head */
.ph{background:linear-gradient(135deg,#16324f,#1d4a6e);color:#fff;padding:54px 0}
.ph h1{margin:0 0 8px;font-size:clamp(25px,3.6vw,38px);font-weight:800;letter-spacing:-.4px}
.ph p{margin:0;color:rgba(255,255,255,.84);font-size:15px}
.crumb{font-size:12.5px;color:rgba(255,255,255,.72);margin-bottom:12px;letter-spacing:.5px}
.crumb a:hover{color:#fff}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(12,22,36,.86);display:none;align-items:center;justify-content:center;
  z-index:200;padding:26px;backdrop-filter:blur(3px)}
.lb.on{display:flex}
.lb-box{background:#fff;border-radius:16px;max-width:840px;width:100%;max-height:92vh;overflow:auto;
  display:grid;grid-template-columns:1.1fr .9fr;box-shadow:0 30px 80px rgba(0,0,0,.4)}
.lb-img{background:var(--soft);display:flex;align-items:center;justify-content:center;padding:26px;min-height:300px}
.lb-img img{max-height:56vh;width:auto;object-fit:contain}
.lb-info{padding:30px 28px;display:flex;flex-direction:column;justify-content:center}
.lb-info i{font-style:normal;font-size:11.5px;color:var(--acc2);letter-spacing:2px;text-transform:uppercase;font-weight:700}
.lb-info h3{margin:10px 0 6px;color:var(--pri);font-size:22px;line-height:1.25}
.lb-info .sku{color:var(--ink2);font-size:13.5px;margin:0 0 18px}
.lb-info p.d{margin:0 0 22px;color:var(--ink2);font-size:14.3px}
.lb-close{position:absolute;top:20px;right:22px;background:rgba(255,255,255,.14);border:0;color:#fff;
  width:40px;height:40px;border-radius:50%;font-size:22px;cursor:pointer;transition:.18s}
.lb-close:hover{background:rgba(255,255,255,.28)}

/* footer */
.ft{background:#0f1c2e;color:rgba(255,255,255,.76);margin-top:0;padding:56px 0 0}
.ft-in{display:grid;grid-template-columns:1.5fr 1fr 1.4fr;gap:44px;padding-bottom:40px}
.ft-logo{height:40px;width:auto;margin-bottom:16px}
.ft-col h4{margin:0 0 15px;color:#fff;font-size:14px;letter-spacing:1.4px;text-transform:uppercase}
.ft-col p{font-size:13.8px;line-height:1.75;margin:0}
.ft-col a{display:block;font-size:14px;padding:5px 0;transition:.16s}
.ft-col a:hover{color:var(--acc)}
.ft-addr{margin-top:12px!important;font-size:13.3px!important}
.ft-btm{border-top:1px solid rgba(255,255,255,.11);padding:19px 0;display:flex;justify-content:space-between;
  gap:14px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.52)}

/* reveal —— 无 JS 时内容默认可见，避免 JS 失效导致内容永久隐藏 */
.rv{opacity:1;transform:none}
html.js .rv{opacity:0;transform:translateY(22px);transition:opacity .65s ease,transform .65s ease}
html.js .rv.in{opacity:1;transform:none}

@media(max-width:980px){
  .split,.lb-box{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .diffs{grid-template-columns:1fr}
  .ft-in{grid-template-columns:1fr;gap:32px}
}
@media(max-width:760px){
  .nav{position:fixed;top:74px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:10px 5%;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-140%);transition:.3s;max-height:calc(100vh - 74px);overflow:auto}
  .nav.open{transform:none}
  .nav a{padding:14px 4px;border-radius:0;border-bottom:1px solid var(--line)}
  .burger{display:flex}
  .hero-in{padding:60px 0 66px}
  .sec{padding:52px 0}
  .cta{padding:38px 24px}
  .pgrid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:13px}
  .cats{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
  .ft-btm{flex-direction:column;gap:6px}
}