*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#0a3d62; --primary-dark:#072c47; --accent:#1e9e50; --cta:#f39c12;
  --text:#22303c; --muted:#64748b; --bg-soft:#f4f7fa; --line:#e3e9ef;
  --radius:12px; --shadow:0 6px 24px rgba(10,61,98,.08);
}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);line-height:1.65;background:#fff}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:min(1200px,92%);margin-inline:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:700;border:2px solid transparent;cursor:pointer;transition:.25s;font-size:15px;font-family:inherit}
.btn-cta{background:var(--cta);color:#fff}
.btn-cta:hover{filter:brightness(1.08)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{border-color:#fff;color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.15)}
.btn-ghost{border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-sm{padding:8px 18px;font-size:14px}
.section{padding:76px 0}
.section-alt{background:var(--bg-soft)}
.section-head{text-align:center;max-width:780px;margin:0 auto 44px}
.section-head h2{font-size:clamp(24px,3vw,34px);color:var(--primary)}
.section-head p{color:var(--muted);margin-top:10px}
.eyebrow{display:inline-block;color:var(--accent);font-weight:700;letter-spacing:2px;font-size:13px;text-transform:uppercase;margin-bottom:8px}
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:0 14px 34px rgba(10,61,98,.14)}
.card-body{padding:20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{color:var(--primary);font-size:19px}
.card-body p{font-size:14.5px;color:var(--muted)}
.card-tag{display:inline-block;background:rgba(30,158,80,.12);color:var(--accent);font-size:12.5px;font-weight:700;padding:4px 12px;border-radius:999px;width:fit-content}
.card-body .btn{margin-top:auto;width:fit-content}
.meta-chips{display:flex;flex-wrap:wrap;gap:8px}
.meta-chips span{background:var(--bg-soft);border:1px solid var(--line);font-size:12.5px;padding:3px 10px;border-radius:999px;color:var(--muted)}
.ph{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:220px;color:#fff;font-weight:600;letter-spacing:.4px;text-align:center;padding:18px;background:linear-gradient(135deg,#0a3d62,#1d7fb8)}
.ph small{display:block;font-weight:400;opacity:.85;margin-top:6px;font-size:12.5px}
.ph-green{background:linear-gradient(135deg,#0c6b3d,#2eb872)}
.ph-amber{background:linear-gradient(135deg,#8a5a12,#f0a63a)}
.ph-slate{background:linear-gradient(135deg,#2f3e4e,#5c7186)}
.ph-tall{min-height:340px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:26px;min-height:76px;position:relative}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.logo-mark{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;flex:none}
.logo-mark-lg{width:76px;height:76px;font-size:30px;border-radius:20px;margin:0 auto}
.brand-text{font-weight:800;color:var(--primary);line-height:1.25;font-size:15.5px}
.brand-text small{display:block;font-weight:500;color:var(--muted);font-size:12px}
.main-nav ul{display:flex;gap:22px}
.main-nav a{font-size:14.5px;font-weight:600;color:#33475b;padding:8px 2px;position:relative;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:var(--primary)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:2px;background:var(--cta)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex:none}
.lang-switch{font-weight:700;color:var(--primary);border:1.5px solid var(--primary);padding:6px 14px;border-radius:999px;font-size:13px;white-space:nowrap}
.lang-switch:hover{background:var(--primary);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2.5px;background:var(--primary);border-radius:2px}
.hero{position:relative;height:min(88vh,760px);min-height:520px;overflow:hidden;background:var(--primary-dark)}
.hero-slide{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;opacity:0;transition:opacity .8s;pointer-events:none}
.hero-slide.active{opacity:1;pointer-events:auto}
.hero-slide::before{content:"";position:absolute;inset:0;background:rgba(5,26,43,.35)}
.slide-bg-1{background:linear-gradient(135deg,#0a3d62,#12699e 55%,#1e9e50)}
.slide-bg-2{background:linear-gradient(135deg,#072c47,#0a3d62 60%,#c98a1e)}
.slide-bg-3{background:linear-gradient(135deg,#0c4a33,#0a3d62 65%,#1d7fb8)}
.hero-content{position:relative;color:#fff;max-width:920px;padding:0 22px}
.hero-kicker{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);padding:6px 18px;border-radius:999px;font-size:13.5px;letter-spacing:1.5px;margin-bottom:18px}
.hero-title{font-size:clamp(28px,4.5vw,52px);line-height:1.2;margin-bottom:16px}
.hero-sub{font-size:clamp(15px,1.8vw,19px);opacity:.92;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots button{width:36px;height:5px;border-radius:3px;background:rgba(255,255,255,.4);border:0;cursor:pointer;transition:.3s}
.hero-dots button.active{background:var(--cta)}
.page-hero{background:linear-gradient(120deg,var(--primary-dark),var(--primary) 55%,#12699e);color:#fff;padding:64px 0 54px;text-align:center}
.page-hero h1{font-size:clamp(26px,3.6vw,40px);margin-bottom:10px}
.page-hero p{opacity:.88;max-width:720px;margin:0 auto}
.breadcrumb{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;font-size:13.5px;opacity:.85;margin-top:16px}
.breadcrumb a:hover{text-decoration:underline}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split-text h2{font-size:clamp(22px,2.6vw,32px);color:var(--primary);margin-bottom:16px}
.split-text p{color:#3d4c5c;margin-bottom:14px}
.split-text .btn{margin-top:8px}
.strength{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.strength .ico{width:54px;height:54px;flex:none;border-radius:14px;background:rgba(30,158,80,.12);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:24px}
.strength h3{color:var(--primary);font-size:17.5px;margin-bottom:6px}
.strength p{font-size:14.5px;color:var(--muted)}
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:30px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:3px;background:linear-gradient(var(--primary),var(--accent));border-radius:2px}
.tl-item{position:relative;padding:0 0 34px 26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-29px;top:5px;width:14px;height:14px;border-radius:50%;background:#fff;border:4px solid var(--accent)}
.tl-year{color:var(--cta);font-weight:800;font-size:17px}
.tl-item h3{color:var(--primary);font-size:17px;margin:2px 0}
.tl-item p{color:var(--muted);font-size:14.5px}
.flow{display:flex;flex-wrap:wrap;justify-content:center;align-items:stretch;gap:14px}
.flow-step{flex:1 1 150px;max-width:190px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 14px;text-align:center;box-shadow:var(--shadow)}
.flow-step .num{width:38px;height:38px;margin:0 auto 10px;border-radius:50%;background:var(--primary);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.flow-step h3{font-size:15.5px;color:var(--primary)}
.flow-step p{font-size:13px;color:var(--muted);margin-top:4px}
.flow-arrow{align-self:center;font-size:22px;color:var(--accent);font-weight:800}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.filter-btn{padding:9px 20px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-weight:600;cursor:pointer;font-family:inherit;font-size:14px;color:#33475b;transition:.2s}
.filter-btn:hover{border-color:var(--primary);color:var(--primary)}
.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.products-layout{display:grid;grid-template-columns:250px 1fr;gap:34px;align-items:start}
.side-nav{position:sticky;top:96px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.side-nav h2{background:var(--primary);color:#fff;font-size:16px;padding:16px 20px}
.side-nav a{display:block;padding:13px 20px;border-bottom:1px solid var(--line);font-size:14.5px;font-weight:600;color:#33475b}
.side-nav a:last-child{border-bottom:0}
.side-nav a:hover,.side-nav a.active{background:var(--bg-soft);color:var(--primary);border-left:3px solid var(--cta)}
.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.spec-table th,.spec-table td{padding:13px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:14.5px}
.spec-table th{background:var(--bg-soft);color:var(--primary);font-weight:700;width:34%}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.detail-top{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:start}
.detail-info h1{font-size:clamp(22px,2.6vw,32px);color:var(--primary);margin-bottom:12px}
.detail-info .summary{color:var(--muted);margin-bottom:18px}
.detail-points{margin:0 0 24px;display:grid;gap:9px}
.detail-points li{padding-left:26px;position:relative;font-size:15px}
.detail-points li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800}
.detail-actions{display:flex;gap:14px;flex-wrap:wrap}
.inquiry-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.inquiry-form .full{grid-column:1/-1}
.inquiry-form label{font-size:13.5px;font-weight:700;display:block;margin-bottom:6px}
.inquiry-form input,.inquiry-form textarea,.inquiry-form select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff;color:var(--text)}
.inquiry-form input:focus,.inquiry-form textarea:focus,.inquiry-form select:focus{outline:2px solid var(--accent);border-color:transparent}
.inquiry-form textarea{min-height:110px;resize:vertical}
.form-note{grid-column:1/-1;font-size:13px;opacity:.85}
.cta-band{position:relative;background:linear-gradient(rgba(7,44,71,.9),rgba(7,44,71,.92)),linear-gradient(135deg,#0a3d62,#12699e);color:#fff;padding:80px 0}
.cta-band .section-head h2{color:#fff}
.cta-band .section-head p{color:rgba(255,255,255,.8)}
.cta-contact{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 34px;margin-bottom:38px;font-size:15.5px}
.cta-contact strong{color:var(--cta)}
.cta-form-wrap{max-width:860px;margin:0 auto;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:30px}
.site-footer{background:var(--primary-dark);color:#c9d6e2}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1.3fr;gap:40px;padding:58px 0 42px}
.footer-grid h3{color:#fff;font-size:16.5px;margin-bottom:16px}
.f-brand .logo-row{display:flex;align-items:center;gap:12px;margin-bottom:14px;color:#fff;font-weight:800}
.f-brand p{font-size:14px;line-height:1.7}
.f-nav a{display:block;padding:5px 0;font-size:14px;opacity:.85}
.f-nav a:hover{opacity:1;color:var(--cta)}
.f-contact p{font-size:14px;margin-bottom:9px}
.f-contact strong{color:#fff}
.f-contact a:hover{color:var(--cta)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12.5px;color:#8fa3b5}
.footer-bottom .container{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.footer-bottom a:hover{color:#fff}
.whatsapp-float{position:fixed;right:22px;bottom:22px;z-index:99;width:58px;height:58px;border-radius:50%;background:#25d366;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(37,211,102,.45);transition:transform .2s}
.whatsapp-float:hover{transform:scale(1.08)}
.whatsapp-float svg{width:30px;height:30px;fill:#fff}
.lang-gate-body{min-height:100vh;display:flex;background:linear-gradient(135deg,var(--primary-dark),var(--primary) 55%,#12699e)}
.lang-gate{flex:1;display:flex;align-items:center;justify-content:center;padding:40px 20px}
.gate-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(6px);border-radius:20px;text-align:center;color:#fff;padding:56px 44px;max-width:640px}
.gate-card h1{font-size:clamp(22px,3vw,32px);margin:22px 0 4px}
.gate-cn{font-size:19px;opacity:.92;margin-bottom:14px}
.gate-slogan{font-size:13.5px;opacity:.8;line-height:1.8;margin-bottom:30px}
.gate-buttons{display:flex;gap:16px;justify-content:center;margin-bottom:28px}
.gate-contact{font-size:13.5px;opacity:.85}
.gate-contact a{color:var(--cta);font-weight:700}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}
.reveal.show{opacity:1;transform:none}
@media(max-width:1120px){
  .main-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);display:none;box-shadow:var(--shadow)}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:0;padding:8px 4% 14px}
  .main-nav a{display:block;padding:13px 4px;border-bottom:1px dashed var(--line)}
  .main-nav a.active::after{display:none}
  .nav-toggle{display:flex}
}
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .split,.detail-top{grid-template-columns:1fr}
  .products-layout{grid-template-columns:1fr}
  .side-nav{position:static}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .inquiry-form{grid-template-columns:1fr}
  .header-actions .btn-cta{display:none}
  .flow-arrow{transform:rotate(90deg);width:100%;text-align:center}
}