:root{
  --teal:#009775;
  --teal-d:#007a5e;
  --teal-l:#e6f4f1;
  --orange:#FD7400;
  --ink:#14202b;
  --muted:#5d6e79;
  --bg:#f3f6f8;
  --card:#ffffff;
  --line:#e4eaee;
  --navy:#0c2230;
  --radius:16px;
  --shadow:0 10px 30px rgba(12,34,48,.10);
  --shadow-sm:0 4px 14px rgba(12,34,48,.07);
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
section{padding:74px 0}
.eyebrow{display:inline-block;font-size:12.5px;letter-spacing:2px;color:var(--teal);font-weight:800;text-transform:uppercase;margin-bottom:10px}
h2.title{font-size:clamp(24px,3.4vw,34px);color:var(--navy);font-weight:800;line-height:1.3;margin-bottom:12px}
.lead{color:var(--muted);font-size:16px;max-width:740px;margin:0 auto}
.center{text-align:center}

.topbar{height:4px;background:linear-gradient(90deg,var(--teal),#00b894 60%,var(--orange))}

/* header */
header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .25s}
header.scrolled{box-shadow:0 6px 22px rgba(12,34,48,.12)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{display:flex;align-items:center}
.brand .logo img{height:34px;width:auto}
.brand .logo b{font-size:24px;font-weight:800;color:var(--teal);letter-spacing:.5px;display:none}
.brand .sub{font-size:12.5px;color:var(--muted);letter-spacing:.5px;border-left:1px solid var(--line);padding-left:12px;margin-left:4px}
.menu{display:flex;align-items:center;gap:4px;list-style:none}
.menu a{color:#22323d;font-size:15px;padding:9px 14px;border-radius:9px;transition:background .2s,color .2s;font-weight:600}
.menu a:hover{background:var(--teal-l);color:var(--teal-d)}
.menu a.cta{background:var(--teal);color:#fff;font-weight:700}
.menu a.cta:hover{background:var(--teal-d)}
.menu a.active{color:var(--teal-d)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:0;padding:8px}
.burger span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:.3s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero split */
.hero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(120deg,var(--teal) 0%,#0a6b58 55%,var(--navy) 100%)}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(circle at 80% 20%,#000,transparent 70%);pointer-events:none}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;padding:84px 20px 92px}
.hero .tag{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);padding:5px 14px;border-radius:30px;font-size:13px;font-weight:600;margin-bottom:18px}
.hero h1{font-size:clamp(28px,4.4vw,48px);font-weight:800;line-height:1.25;letter-spacing:.5px}
.hero h1 .hl{color:#7af0d2}
.hero p.sub{margin:18px 0 26px;font-size:17px;color:#e4f4ee;max-width:540px}
.btns{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 25px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;transition:transform .15s,box-shadow .2s;border:2px solid transparent}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 10px 24px rgba(253,116,0,.35)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.hero-stats{display:flex;gap:22px;margin-top:26px;flex-wrap:wrap}
.hero-stats .s b{display:block;font-size:24px;color:#fff;font-weight:800}
.hero-stats .s span{font-size:12.5px;color:#c7e6dd}
.hero-img{position:relative}
.hero-img .frame{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.25);border-radius:18px;padding:18px;backdrop-filter:blur(6px);box-shadow:0 18px 40px rgba(0,0,0,.28)}
.hero-img img{width:100%;height:auto;max-height:360px;object-fit:contain;border-radius:10px}
.hero-img .cap{margin-top:12px;text-align:center;font-size:13px;color:#cfe9e1}

/* product lines */
.grid{display:grid;gap:22px}
.lines-grid{grid-template-columns:repeat(3,1fr);margin-top:42px}
.line-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s,border-color .2s;position:relative;overflow:hidden;display:flex;flex-direction:column}
.line-card::before{content:"";position:absolute;left:0;top:0;height:4px;width:100%;background:linear-gradient(90deg,var(--teal),#00b894)}
.line-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.line-ico{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--teal-l);margin-bottom:16px}
.line-ico svg{width:28px;height:28px;stroke:var(--teal);fill:none;stroke-width:1.8}
.line-card h3{font-size:18px;color:var(--navy);margin-bottom:6px;font-weight:700}
.line-card .models{font-size:13.5px;color:var(--teal-d);font-weight:700;margin-bottom:10px;font-family:Consolas,monospace}
.line-card p{font-size:14px;color:var(--muted);flex:1}
.line-card a.more{display:inline-block;margin-top:14px;font-size:14px;color:var(--teal-d);font-weight:700}
.line-card a.more:hover{text-decoration:underline}

/* cases */
.cases-grid{grid-template-columns:repeat(3,1fr);margin-top:42px}
.case{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.cmedia{height:158px;overflow:hidden;background:var(--teal-l);display:flex;align-items:center;justify-content:center}
.cmedia img{width:100%;height:100%;object-fit:cover}
.cmedia .ph{font-size:13px;color:var(--teal-d);font-weight:700}
.case .top{padding:18px 22px 0;display:flex;align-items:center;gap:10px}
.badge{font-size:11.5px;font-weight:800;padding:4px 11px;border-radius:20px;color:#fff}
.badge.pdf{background:#d1495b}
.badge.video{background:var(--teal)}
.badge.story{background:#3a7bd5}
.case .body{padding:12px 22px 22px;flex:1;display:flex;flex-direction:column}
.case h3{font-size:16px;color:var(--navy);font-weight:700;margin-bottom:8px;line-height:1.45}
.case p{font-size:13.5px;color:var(--muted);flex:1}
.case .go{margin-top:16px;display:inline-flex;align-items:center;gap:6px;color:var(--teal-d);font-weight:800;font-size:14px}
.case .go:hover{text-decoration:underline}

/* about */
.about{background:linear-gradient(135deg,var(--navy),#103040);color:#fff}
.about .grid2{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:center}
.about h2{color:#fff}
.about .eyebrow{color:#7af0d2}
.about p{color:#cfe2dc;font-size:15.5px}
.about ul{list-style:none;margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.about ul li{padding:14px 16px;background:rgba(255,255,255,.06);border-radius:10px;font-size:14.5px}
.about ul li b{display:block;font-size:22px;color:#7af0d2;font-weight:800}
.about .quote{background:rgba(255,255,255,.06);border-left:4px solid var(--orange);padding:18px 20px;border-radius:0 12px 12px 0;font-size:14.5px;color:#e4f1ec}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:30px;margin-top:42px}
.contact-card{background:linear-gradient(135deg,#fff,#eef6f4);border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:var(--shadow)}
.contact-card .region{font-size:13px;color:var(--teal-d);font-weight:800;letter-spacing:1px}
.contact-card h3{font-size:26px;color:var(--navy);margin:6px 0 18px;font-weight:800}
.c-row{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line)}
.c-row:last-child{border-bottom:0}
.c-ico{width:42px;height:42px;border-radius:10px;background:var(--teal-l);display:flex;align-items:center;justify-content:center;flex:none}
.c-ico svg{width:22px;height:22px;stroke:var(--teal);fill:none;stroke-width:1.8}
.c-row .k{font-size:13px;color:var(--muted)}
.c-row .v{font-size:16.5px;color:var(--navy);font-weight:700}
.c-row .v a{color:var(--teal-d)}
.c-row .v a:hover{text-decoration:underline}
.phone-big{font-size:26px;color:var(--teal-d);font-weight:800;letter-spacing:1px}
.map-note{margin-top:18px;font-size:13px;color:var(--muted);background:var(--teal-l);border-radius:10px;padding:12px 14px}
.form-card{background:var(--navy);border-radius:18px;padding:34px;color:#fff;box-shadow:var(--shadow)}
.form-card h3{font-size:20px;color:#fff;margin-bottom:6px}
.form-card p{font-size:13.5px;color:#bcd3c6;margin-bottom:18px}
.field{margin-bottom:14px}
.field input,.field textarea{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.07);color:#fff;font-size:14px;font-family:inherit}
.field input::placeholder,.field textarea::placeholder{color:#9fb6a6}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--teal);background:rgba(255,255,255,.12)}
.form-card select{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.07);color:#fff;font-size:14px;font-family:inherit}
.form-card select option{color:#000}
.form-card .btn-primary{width:100%;justify-content:center;border:0;background:var(--orange)}
.form-note{font-size:12px;color:#9fb6a6;margin-top:12px;text-align:center}

/* footer */
footer{background:var(--navy);color:#9fb6a6;padding:42px 0 26px;border-top:1px solid rgba(255,255,255,.08)}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;align-items:flex-start}
.foot .brand2 .logo{display:flex;align-items:center;gap:10px}
.foot .brand2 .logo img{height:30px}
.foot .brand2 .logo b{color:#fff;font-weight:800;font-size:20px;display:none}
.foot .brand2 p{font-size:13px;margin-top:10px;max-width:320px}
.foot-links{display:flex;gap:40px;flex-wrap:wrap}
.foot-col h4{color:#fff;font-size:14px;margin-bottom:12px}
.foot-col a{display:block;font-size:13px;color:#9fb6a6;margin-bottom:8px}
.foot-col a:hover{color:#7af0d2}
.copy{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);font-size:12.5px;text-align:center;color:#7f978c}

/* ===== Subpage (products) ===== */
.subhero{background:linear-gradient(120deg,var(--teal),#0a6b58 60%,var(--navy));color:#fff;padding:54px 0 60px}
.crumbs{font-size:13px;color:#bfe6da;margin-bottom:14px}
.crumbs a:hover{color:#fff;text-decoration:underline}
.subhero h1{font-size:clamp(26px,4vw,40px);font-weight:800;line-height:1.25}
.subhero .st{margin-top:10px;font-size:16px;color:#e1f3ec;max-width:620px}
.subwrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-top:28px}
.subimg{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.25);border-radius:16px;padding:16px;backdrop-filter:blur(6px)}
.subimg img{width:100%;height:auto;max-height:340px;object-fit:contain;border-radius:10px}
.subimg .ph{width:100%;height:240px;display:flex;align-items:center;justify-content:center}
.subimg .ph svg{width:90px;height:90px;stroke:#fff;fill:none;stroke-width:1.4;opacity:.9}
.pblock{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);margin-top:34px}
.pblock h2{font-size:20px;color:var(--navy);font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.pblock h2::before{content:"";width:6px;height:22px;border-radius:3px;background:var(--teal)}
.pblock p{color:var(--muted);font-size:15px}
.feat{list-style:none;margin-top:8px;display:grid;gap:10px}
.feat li{font-size:14.5px;color:var(--ink);padding-left:26px;position:relative}
.feat li::before{content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:50%;background:var(--orange)}
.mods{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.mods .chip{background:var(--teal-l);color:var(--teal-d);font-weight:700;font-size:13.5px;padding:7px 14px;border-radius:30px;font-family:Consolas,monospace}
.res{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:8px}
.res a{display:flex;align-items:center;gap:10px;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-weight:700;color:var(--teal-d);font-size:14px;transition:border-color .2s,transform .2s}
.res a:hover{border-color:var(--teal);transform:translateY(-2px)}
.res a svg{width:20px;height:20px;stroke:var(--teal);fill:none;stroke-width:1.8;flex:none}
.pcta{margin-top:34px;background:linear-gradient(135deg,var(--navy),#103040);color:#fff;border-radius:18px;padding:30px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.pcta .t{font-size:18px;font-weight:800}
.pcta .t span{display:block;font-size:13.5px;font-weight:400;color:#bcd3c6;margin-top:4px}
.pcta .acts{display:flex;gap:12px;flex-wrap:wrap}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;padding:60px 20px 70px}
  .lines-grid{grid-template-columns:repeat(2,1fr)}
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .about .grid2{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .subwrap{grid-template-columns:1fr}
  .res{grid-template-columns:1fr}
}
@media (max-width:760px){
  .burger{display:flex}
  .menu{position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:8px 14px 16px;max-height:0;overflow:hidden;transition:max-height .3s ease;box-shadow:0 12px 22px rgba(12,34,48,.18)}
  .menu.open{max-height:560px}
  .menu a{padding:13px 12px}
  .menu a.cta{margin-top:6px;text-align:center}
  .lines-grid,.cases-grid{grid-template-columns:1fr}
  section{padding:54px 0}
  .hero-stats{gap:16px}
}