:root{
  --navy:#0A2540; --navy-2:#0E3357; --teal:#00A9A5; --green:#6FA83A;
  --ink:#12202E; --muted:#5C6B7A; --line:#E3E9EF; --bg:#FFFFFF; --bg-soft:#F6F9FB;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.eyebrow{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);font-weight:700}
h1,h2,h3{line-height:1.22;letter-spacing:-.015em}
h2{font-size:clamp(26px,3.2vw,38px);font-weight:750}
.lead{color:#4E5E6D;font-size:clamp(15px,1.4vw,17.5px);max-width:70ch}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;color:var(--navy)}
.brand .mark{width:30px;height:30px;border-radius:7px;background:linear-gradient(135deg,var(--teal),var(--green));
  display:grid;place-items:center;color:#fff;font-size:14px;font-weight:800}
.brand small{display:block;font-size:9.5px;letter-spacing:.13em;color:var(--muted);font-weight:600;text-transform:uppercase}
nav.links{display:flex;gap:26px;margin-left:auto;font-size:14.5px;font-weight:560;color:#2A3B4D}
nav.links a:hover{color:var(--teal)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:8px;font-weight:650;font-size:14.5px;
  transition:.18s;white-space:nowrap}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 6px 18px rgba(0,169,165,.28)}
.btn-primary:hover{background:#008F8C;transform:translateY(-1px)}
.btn-ghost{border:1.5px solid var(--line);color:var(--navy)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.burger{display:none;margin-left:auto;background:none;border:0;font-size:24px;color:var(--navy)}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:url("images/plant_aerial.jpg") center/cover;opacity:.15;filter:saturate(.8)}
.hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(10,37,64,.96) 0%,rgba(10,37,64,.82) 45%,rgba(14,51,87,.55) 100%)}
.hero .wrap{position:relative;z-index:2;padding:clamp(64px,9vw,104px) 24px clamp(56px,7vw,84px)}
.hero h1{font-size:clamp(30px,4.4vw,52px);font-weight:800;max-width:22ch;margin:16px 0 18px}
.hero h1 em{font-style:normal;color:#4FD8D3}
.hero p{color:#DBE7F1;font-size:clamp(15px,1.5vw,18px);max-width:58ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-cta .btn-ghost{border-color:rgba(255,255,255,.32);color:#fff}
.hero-cta .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}
.trustbar{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;background:rgba(255,255,255,.08);
  border-radius:12px;overflow:hidden;margin-top:52px;max-width:820px;position:relative;z-index:2}
.trustbar div{background:rgba(9,32,55,.72);padding:18px 20px}
.trustbar b{display:block;font-size:clamp(20px,2.4vw,27px);font-weight:780;color:#fff}
.trustbar span{font-size:12px;color:#C4D5E3;letter-spacing:.04em}

/* ---------- sections ---------- */
section{padding:clamp(56px,7vw,88px) 0}
.sec-head{max-width:66ch;margin-bottom:44px}
.sec-head h2{margin:12px 0 14px}
.soft{background:var(--bg-soft)}

/* projects */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.proj{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  display:flex;flex-direction:column;transition:.2s}
.proj:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(10,37,64,.10)}
.proj .cap{padding:22px 22px 24px}
.proj .tag{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:#006E6B;background:#DDF2F1;padding:4px 9px;border-radius:5px;margin-bottom:12px}
.proj h3{font-size:18.5px;margin-bottom:8px}
.proj .cap-num{font-size:26px;font-weight:800;color:var(--navy);letter-spacing:-.02em}
.proj p{font-size:14px;color:var(--muted);margin-top:8px}

/* products */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.prod{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px 22px;transition:.2s}
.prod:hover{border-color:#BFE6E4;box-shadow:0 10px 30px rgba(10,37,64,.07)}
.prod .ico{width:42px;height:42px;border-radius:10px;background:#EAF6F5;display:grid;place-items:center;margin-bottom:14px}
.prod .ico svg{width:22px;height:22px;stroke:var(--teal);fill:none;stroke-width:1.8}
.prod h3{font-size:16.5px;margin-bottom:6px}
.prod p{font-size:13.5px;color:var(--muted)}

/* solutions */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.sol{border:1px solid var(--line);border-radius:12px;padding:22px;background:#fff}
.sol b{display:block;font-size:16px;margin-bottom:6px;color:var(--navy)}
.sol span{font-size:13.5px;color:var(--muted)}
.sol .n{font-size:11.5px;font-weight:750;color:#00776F;letter-spacing:.1em;margin-bottom:10px;display:block}

/* oem band */
.band{background:var(--navy-2);color:#fff;border-radius:16px;padding:clamp(32px,4.5vw,52px);
  display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.band h2{color:#fff;font-size:clamp(24px,2.8vw,32px)}
.band p{color:#C1D2E1;margin-top:12px;font-size:15px}
.band ul{list-style:none;margin-top:18px;display:grid;gap:9px}
.band li{color:#D7E4EE;font-size:14.5px;padding-left:22px;position:relative}
.band li::before{content:"";position:absolute;left:0;top:8px;width:11px;height:11px;border-radius:3px;
  background:var(--teal)}
.band .btn{background:#fff;color:var(--navy)}

/* why */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.why{padding:26px 22px;border-left:2.5px solid var(--teal);background:#fff}
.why b{display:block;font-size:15.5px;margin-bottom:7px;color:var(--navy)}
.why p{font-size:13.5px;color:var(--muted)}

/* contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact .info{display:grid;gap:18px;margin-top:26px}
.ci{display:flex;gap:13px;align-items:flex-start}
.ci .k{font-size:12px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.ci .v{font-size:15.5px;font-weight:600;color:var(--navy)}
form{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;display:grid;gap:14px}
form label{font-size:12.5px;font-weight:650;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
form input,form textarea,form select{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;
  font:inherit;font-size:14.5px;background:#FCFDFE}
form input:focus,form textarea:focus,form select:focus{outline:none;border-color:var(--teal);
  box-shadow:0 0 0 3px rgba(0,169,165,.12)}
form textarea{min-height:96px;resize:vertical}
form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form button{border:0;cursor:pointer;justify-content:center}

/* footer */
footer{background:var(--navy);color:#B3C6D6;padding:52px 0 96px;font-size:14px}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:34px;
  border-bottom:1px solid rgba(255,255,255,.1)}
footer b{color:#fff;display:block;margin-bottom:14px;font-size:14.5px}
footer a:hover{color:var(--teal)}
footer ul{list-style:none;display:grid;gap:9px;font-size:13.5px}
.f-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:#7A8FA3}

/* whatsapp float */
.wa{position:fixed;right:22px;bottom:26px;z-index:80;background:#25D366;color:#fff;border-radius:50px;
  padding:13px 20px 13px 16px;display:flex;align-items:center;gap:9px;font-weight:700;font-size:14.5px;
  box-shadow:0 10px 26px rgba(37,211,102,.42);transition:.2s}
.wa:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(37,211,102,.5)}
.wa svg{width:21px;height:21px;fill:#fff}

/* responsive */
@media(max-width:900px){
  nav.links{display:none}
  .burger{display:block}
  .proj-grid,.prod-grid,.sol-grid{grid-template-columns:1fr 1fr}
  .why-grid{grid-template-columns:1fr 1fr}
  .band{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr;gap:32px}
  .f-grid{grid-template-columns:1fr 1fr}
  .trustbar{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .proj-grid,.prod-grid,.sol-grid,.why-grid{grid-template-columns:1fr}
  .row2{grid-template-columns:1fr}
}

/* ============ inner page components ============ */
.page-hero{background:var(--navy);color:#fff;padding:clamp(48px,6vw,76px) 0;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(10,37,64,.97),rgba(14,51,87,.88))}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:clamp(28px,3.6vw,44px);font-weight:800;max-width:26ch}
.page-hero p{color:#C4D5E3;margin-top:14px;max-width:64ch;font-size:clamp(14.5px,1.4vw,17px)}
.crumb{font-size:12.5px;color:#8FA6BA;margin-bottom:14px;letter-spacing:.03em}
.crumb a:hover{color:#fff}

.prose{max-width:76ch}
.prose h3{font-size:20px;margin:32px 0 12px;color:var(--navy)}
.prose p{margin-bottom:14px;color:#334454}
.prose ul{margin:0 0 16px 0;padding-left:22px;color:#334454}
.prose li{margin-bottom:7px}
.prose strong{color:var(--navy)}

table.spec{width:100%;border-collapse:collapse;font-size:13.5px;margin:18px 0 8px;
  background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
table.spec th{background:var(--navy);color:#fff;font-weight:650;text-align:left;padding:11px 12px;font-size:12.5px;
  letter-spacing:.04em;white-space:nowrap}
table.spec td{padding:10px 12px;border-top:1px solid var(--line);color:#334454}
table.spec tr:nth-child(even) td{background:#FAFCFD}
.spec-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:10px}
.note{font-size:12.5px;color:var(--muted);margin-top:10px;line-height:1.7}

.filter-bar{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:26px}
.chip{border:1px solid var(--line);background:#fff;border-radius:50px;padding:8px 16px;font-size:13.5px;
  font-weight:600;cursor:pointer;transition:.16s;color:#334454}
.chip:hover{border-color:var(--teal);color:var(--teal)}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}

.proj-table td:first-child{font-weight:600;color:var(--navy);min-width:180px}
.tagline{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.06em;color:#006E6B;
  background:#DDF2F1;padding:3px 8px;border-radius:4px;margin-left:8px;vertical-align:middle}

.cta-band{background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;border-radius:16px;
  padding:clamp(30px,4vw,46px);display:flex;gap:28px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);max-width:26ch}
.cta-band p{color:#BFD0DF;margin-top:10px;max-width:52ch;font-size:14.5px}
.cta-band .btn{background:#fff;color:var(--navy);flex-shrink:0}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
@media(max-width:860px){.two-col{grid-template-columns:1fr;gap:28px}}
.kv{display:grid;gap:14px}
.kv div{border-left:2.5px solid var(--teal);padding-left:14px}
.kv b{display:block;font-size:14.5px;color:var(--navy);margin-bottom:2px}
.kv span{font-size:13.5px;color:var(--muted)}