:root{
  --navy:#042C53; --navy-2:#0C447C; --blue:#185FA5; --blue-light:#378ADD;
  --gold:#BA7517; --gray:#5F5E5A; --ink:#1A2230;
  --bg:#FFFFFF; --bg-soft:#F4F7FB; --border:#DCE5F0;
  --radius:14px; --maxw:1200px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.65; -webkit-font-smoothing:antialiased;
}
img{max-width:100%;}
a{color:var(--blue);}
.container{max-width:var(--maxw); margin:0 auto; padding:0 24px;}
h1,h2,h3,h4{margin:0; line-height:1.25;}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky; top:0; z-index:100; background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--border);}
.nav{display:flex; align-items:center; justify-content:space-between; height:72px;}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none; color:var(--navy);}
.brand-mark{height:54px; padding:4px 6px; border-radius:10px; background:#fff; display:inline-flex; align-items:center; justify-content:center; overflow:hidden;}
.brand-mark img{height:46px; width:auto; display:block;}
.nav-links{display:flex; gap:28px;}
.nav-links a{color:var(--ink); text-decoration:none; font-size:15px; font-weight:500; position:relative; padding:6px 0;}
.nav-links a:hover,.nav-links a.active{color:var(--blue);}
.nav-links a.active::after{content:""; position:absolute; left:0; right:0; bottom:-4px; height:2px; background:var(--blue); border-radius:2px;}
.nav-actions{display:flex; align-items:center; gap:14px;}
.lang-toggle{border:1px solid var(--border); background:#fff; color:var(--navy); padding:8px 13px; border-radius:8px; cursor:pointer; font-size:13px; font-weight:600; transition:.2s; text-decoration:none; display:inline-flex; align-items:center;}
.lang-toggle:hover{border-color:var(--blue-light); color:var(--blue);}
.nav-toggle{display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:6px;}
.nav-toggle span{width:24px; height:2px; background:var(--navy); border-radius:2px; transition:.3s;}

/* ---------- Hero ---------- */
.hero{position:relative; color:#fff; overflow:hidden;
  background:linear-gradient(135deg,#042C53 0%,#0C447C 55%,#185FA5 100%);}
.hero::before{content:""; position:absolute; inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px; opacity:.6;}
.hero::after{content:""; position:absolute; width:620px; height:620px; right:-220px; top:-240px;
  background:radial-gradient(circle,rgba(55,138,221,.38),transparent 70%);}
.hero-inner{position:relative; z-index:2; padding:104px 0 116px;}
.hero .eyebrow{color:#9FC6F2; border:1px solid rgba(159,198,242,.4); padding:6px 14px; border-radius:30px; font-size:13px; letter-spacing:2px; display:inline-block; margin-bottom:22px;}
.hero h1{font-size:clamp(30px,5.2vw,56px); font-weight:800; margin:0 0 18px; letter-spacing:.5px;}
.hero p.lead{font-size:18px; max-width:680px; color:#D4E4F6; margin:0 0 32px;}
.hero-cta{display:flex; gap:14px; flex-wrap:wrap;}
.btn{display:inline-flex; align-items:center; gap:8px; padding:13px 28px; border-radius:10px; font-size:15px; font-weight:600; cursor:pointer; text-decoration:none; border:1px solid transparent; transition:.25s;}
.btn-primary{background:var(--blue-light); color:#fff;}
.btn-primary:hover{background:#2A7AD6; transform:translateY(-2px);}
.btn-ghost{background:transparent; border-color:rgba(255,255,255,.4); color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);}

/* ---------- Sections ---------- */
.section{padding:84px 0;}
.section.alt{background:var(--bg-soft);}
.section-head{max-width:780px; margin:0 auto 50px; text-align:center;}
.eyebrow{display:inline-block; color:var(--blue); font-weight:700; font-size:13px; letter-spacing:2px; text-transform:uppercase; margin-bottom:12px;}
.section-head h2{font-size:clamp(26px,3.4vw,38px); font-weight:800; color:var(--navy); margin:0 0 14px;}
.section-head p{color:var(--gray); font-size:16px; margin:0;}

/* ---------- Grids & Cards ---------- */
.grid{display:grid; gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.card{background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:28px; transition:.25s;}
.card:hover{box-shadow:0 16px 40px rgba(4,44,83,.10); transform:translateY(-4px); border-color:var(--blue-light);}
.card .icon{width:52px; height:52px; border-radius:13px; background:var(--bg-soft); color:var(--blue); display:flex; align-items:center; justify-content:center; margin-bottom:18px;}
.card h3{font-size:19px; color:var(--navy); margin:0 0 10px;}
.card p{color:var(--gray); font-size:14.5px; margin:0;}
.card .more{display:inline-block; margin-top:16px; color:var(--blue); font-weight:700; font-size:14px; text-decoration:none;}
.card .media{margin:-28px -28px 20px; border-radius:var(--radius) var(--radius) 0 0; overflow:hidden; aspect-ratio:16/9; background:var(--bg-soft);}
.card .media img{width:100%; height:100%; object-fit:cover; display:block;}

/* stats */
.stats{display:grid; grid-template-columns:repeat(4,1fr); gap:18px;}
.stat{background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:26px; text-align:center;}
.stat .num{font-size:40px; font-weight:800; color:var(--blue); line-height:1;}
.stat .label{color:var(--gray); font-size:14px; margin-top:8px;}

/* split */
.split{display:grid; grid-template-columns:1.5fr 1fr; gap:30px; align-items:center;}
.split h2{font-size:clamp(24px,3vw,34px); color:var(--navy); margin-bottom:16px;}
.split p{color:var(--gray); font-size:15.5px; margin:0 0 14px;}

/* ---------- Awards wall ---------- */
.filter-bar{display:flex; flex-wrap:wrap; gap:10px; justify-content:center; margin-bottom:34px;}
.filter-bar button{border:1px solid var(--border); background:#fff; color:var(--navy); padding:8px 18px; border-radius:30px; cursor:pointer; font-size:14px; font-weight:600; transition:.2s;}
.filter-bar button.active,.filter-bar button:hover{border-color:var(--blue); background:var(--blue); color:#fff;}
.award-wall{display:grid; grid-template-columns:repeat(4,1fr); gap:18px;}
.award-card{border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; background:#fff; cursor:pointer; transition:.25s;}
.award-card:hover{box-shadow:0 14px 32px rgba(4,44,83,.13); transform:translateY(-3px);}
.award-card img{width:100%; height:212px; object-fit:contain; display:block; background:#fff; padding:10px 16px; box-sizing:border-box;}
.award-card .award-emblem{transition:transform .3s;}
.award-card:hover .award-emblem{transform:scale(1.03);}
.award-card .meta{padding:14px 16px;}
.award-card .meta h4{font-size:15px; color:var(--navy); margin:0 0 4px; line-height:1.4;}
.award-card .meta span{font-size:12.5px; color:var(--gray);}

/* ---------- Tech deep dive ---------- */
.tech-item{display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:center; padding:44px 0; border-bottom:1px solid var(--border);}
.tech-item:last-child{border-bottom:none;}
.tech-item.reverse .tech-figure{order:2;}
.tech-figure{background:var(--bg-soft); border-radius:var(--radius); padding:22px;}
.tech-figure img{width:100%; border-radius:10px; display:block;}
.tech-figure .tech-anim{width:100%; height:auto; border-radius:12px; display:block; box-shadow:0 12px 30px rgba(4,44,83,.18);}
.tech-text h3{font-size:24px; color:var(--navy); margin-bottom:10px;}
.tech-text .tag{display:inline-block; color:var(--blue); font-weight:700; font-size:13px; letter-spacing:1px; margin-bottom:10px;}
.tech-text p{color:var(--gray); font-size:15px; margin:0 0 18px;}
.spec-table{width:100%; border-collapse:collapse;}
.spec-table th,.spec-table td{text-align:left; padding:11px 12px; border-bottom:1px solid var(--border); font-size:14px; vertical-align:top;}
.spec-table th{color:var(--gray); font-weight:600; width:42%;}
.spec-table td{color:var(--ink);}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none;}

/* patents */
.patent-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px;}
.patent-card{border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; background:#fff;}
.patent-card img{width:100%; height:180px; object-fit:cover;}
.patent-card .body{padding:15px 17px;}
.patent-card .tag{color:var(--gold); font-size:12px; font-weight:700; letter-spacing:1px;}
.patent-card h4{font-size:15.5px; color:var(--navy); margin:6px 0 0; line-height:1.45;}

/* migas layers */
.layers{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-top:24px;}
.layer{border:1px solid var(--border); border-radius:var(--radius); padding:20px; background:#fff;}
.layer .lv{color:var(--gold); font-size:12px; font-weight:700; letter-spacing:1px;}
.layer h4{font-size:17px; color:var(--navy); margin:8px 0 10px;}
.layer ul{margin:0; padding-left:18px; color:var(--gray); font-size:13.5px; line-height:1.8;}

/* ---------- Products ---------- */
.prod-card{border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; background:#fff; transition:.25s;}
.prod-card:hover{box-shadow:0 14px 32px rgba(4,44,83,.12); transform:translateY(-3px);}
.prod-card img{width:100%; height:220px; object-fit:contain; background:#fff; padding:16px 18px; border-bottom:1px solid var(--border);}
.prod-card .body{padding:20px 22px;}
.prod-card h3{font-size:19px; color:var(--navy); margin-bottom:8px;}
.prod-card p{color:var(--gray); font-size:14.5px; margin:0 0 12px;}

/* ---------- Contact ---------- */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:40px;}
.info-block{margin-bottom:26px;}
.info-block h4{font-size:15px; color:var(--blue); margin-bottom:6px; letter-spacing:1px;}
.info-block p{margin:0; color:var(--ink); font-size:16px;}
.form-control{width:100%; padding:13px 14px; border:1px solid var(--border); border-radius:10px; font-size:15px; margin-bottom:16px; font-family:inherit;}
.form-control:focus{outline:none; border-color:var(--blue-light);}
textarea.form-control{min-height:130px; resize:vertical;}
.captcha-row{display:flex; align-items:center; gap:12px; margin-bottom:16px;}
.captcha-q{font-size:15px; font-weight:700; color:var(--navy); white-space:nowrap;}
.captcha-input{flex:0 0 130px; margin-bottom:0 !important;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy); color:#cfe0f5; padding:56px 0 24px; margin-top:30px;}
.footer-grid{display:grid; grid-template-columns:2fr 1fr 1.4fr; gap:38px;}
.site-footer h4{color:#fff; font-size:15px; margin:0 0 16px;}
.site-footer a{color:#bcd3ee; text-decoration:none; display:block; margin-bottom:9px; font-size:14px;}
.site-footer a:hover{color:#fff;}
.footer-desc{color:#9db6d4; font-size:14px; line-height:1.7; max-width:420px; margin:12px 0 0;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12); margin-top:36px; padding-top:20px; font-size:13px; color:#8aa3c4;}


/* ---------- 合作伙伴认可 ---------- */
.partner-wall{display:grid; grid-template-columns:repeat(5,1fr); gap:18px; margin-top:26px;}
.partner-logo{background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:26px 14px; text-align:center; transition:.25s; display:flex; flex-direction:column; align-items:center; justify-content:flex-start;}
.partner-logo:hover{box-shadow:0 10px 26px rgba(4,44,83,.10); transform:translateY(-3px); border-color:var(--blue-light);}
.partner-logo{position:relative; min-height:148px;}
.partner-logo .plogo{display:none; width:auto; max-width:150px; max-height:52px; object-fit:contain; margin-bottom:12px;}
.partner-logo .plogo.loaded{display:block;}
.partner-logo .mark{width:56px; height:56px; border-radius:14px; display:flex; align-items:center; justify-content:center; font-size:18px; font-weight:800; color:#fff; background:var(--navy); margin-bottom:14px; letter-spacing:.5px;}
.partner-logo .mark.sm{font-size:14px; letter-spacing:0;}
.partner-logo .pname{font-size:15.5px; font-weight:700; color:var(--navy); line-height:1.35; margin-bottom:6px;}
.partner-logo .ptag{font-size:12px; color:var(--gray);}
@media (max-width:1100px){.partner-wall{grid-template-columns:repeat(3,1fr);}}
@media (max-width:680px){.partner-wall{grid-template-columns:repeat(2,1fr);}}

/* ---------- Reveal ---------- */
.reveal{opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s ease;}
.reveal.in{opacity:1; transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .nav-links{position:fixed; top:72px; left:0; right:0; background:#fff; flex-direction:column; gap:0; padding:0; border-bottom:1px solid var(--border); max-height:0; overflow:hidden; transition:max-height .3s;}
  .nav-links.open{max-height:440px;}
  .nav-links a{padding:16px 24px; border-bottom:1px solid var(--border);}
  .nav-toggle{display:flex;}
  .grid-3,.patent-grid,.award-wall,.layers{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);}
  .tech-item,.tech-item.reverse .tech-figure,.split,.contact-grid{grid-template-columns:1fr;}
  .tech-item.reverse .tech-figure{order:0;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:560px){
  .grid-3,.patent-grid,.award-wall,.layers,.stats{grid-template-columns:1fr;}
  .section{padding:60px 0;}
}