:root{
  --navy:#0b2545;
  --navy-2:#123a63;
  --accent:#f97316;
  --accent-soft:#fff1e7;
  --ink:#16233a;
  --muted:#5a6b83;
  --line:#e3e9f0;
  --bg:#ffffff;
  --bg-soft:#f5f8fb;
  --radius:14px;
  --shadow:0 4px 20px rgba(11,37,69,.07);
  --shadow-lg:0 14px 40px rgba(11,37,69,.13);
  --max:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","Helvetica Neue",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{
  width:38px;height:38px;border-radius:9px;background:var(--navy);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:14px;letter-spacing:.5px;flex:none;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text b{font-size:15px;color:var(--navy)}
.logo-text i{font-style:normal;font-size:10px;letter-spacing:1.6px;color:var(--muted)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:14px;color:var(--muted);transition:color .2s}
.nav a:hover{color:var(--accent)}
.btn-nav{
  background:var(--navy);color:#fff!important;padding:8px 16px;border-radius:8px;
  font-size:13.5px;transition:background .2s
}
.btn-nav:hover{background:var(--accent)}
.nav-right{display:flex;align-items:center;gap:10px}
.lang-btn{
  border:1px solid var(--line);background:#fff;color:var(--navy);font-size:12.5px;
  padding:6px 12px;border-radius:7px;cursor:pointer;font-weight:600;min-width:44px;
}
.lang-btn:hover{border-color:var(--accent);color:var(--accent)}
.menu-btn{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:6px}
.menu-btn span{width:20px;height:2px;background:var(--navy);display:block;border-radius:2px}

/* ---------- hero ---------- */
.hero{position:relative;padding:88px 0 76px;overflow:hidden;background:var(--navy)}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 460px at 78% 12%,rgba(249,115,22,.20),transparent 60%),
    radial-gradient(700px 420px at 10% 90%,rgba(56,140,255,.16),transparent 62%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.tag{
  display:inline-block;font-size:12.5px;letter-spacing:1.4px;color:#ffd7bd;
  border:1px solid rgba(255,255,255,.28);padding:6px 14px;border-radius:20px;margin-bottom:22px;
}
.hero h1{
  font-size:46px;line-height:1.22;color:#fff;font-weight:700;letter-spacing:-.5px;margin-bottom:20px;
}
.hero p{color:#c6d6e8;font-size:15.5px;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.btn{
  display:inline-block;padding:13px 26px;border-radius:9px;font-size:14.5px;
  font-weight:600;cursor:pointer;border:2px solid transparent;transition:all .2s;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#ea6108;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.full{width:100%}
.hero-stats{display:flex;gap:38px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:27px;color:#fff;font-weight:700;line-height:1.2}
.hero-stats span{font-size:12.5px;color:#9db4cc}

/* hero visual: chip + pcb */
.hero-visual{position:relative;height:320px;display:grid;place-items:center}
.chip{position:relative;width:150px;height:150px;z-index:2}
.chip-body{
  position:absolute;inset:14px;border-radius:12px;
  background:linear-gradient(145deg,#1d3557,#0f2540);
  border:1px solid rgba(255,255,255,.14);display:grid;place-items:center;
  box-shadow:0 18px 44px rgba(0,0,0,.45);
}
.chip-grid{
  position:absolute;inset:10px;border-radius:8px;
  background-image:linear-gradient(rgba(249,115,22,.16) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(249,115,22,.16) 1px,transparent 1px);
  background-size:16px 16px;
}
.chip-core{
  position:relative;font-size:26px;font-weight:700;color:var(--accent);letter-spacing:1px;
}
.chip-pins{position:absolute;display:flex;justify-content:space-between}
.chip-pins.h{left:0;right:0;top:0;bottom:0;flex-direction:column;padding:2px 0}
.chip-pins.v{top:0;bottom:0;left:0;right:0;padding:0 2px}
.chip-pins span{background:#9fb3c8;border-radius:1px}
.chip-pins.h span{width:3px;height:13px;margin:0 12px}
.chip-pins.v span{height:3px;width:13px;margin:12px 0}
.pcb{
  position:absolute;bottom:6px;right:-6px;width:250px;height:150px;border-radius:12px;
  background:linear-gradient(150deg,#0d5c3f,#09422d);
  border:1px solid rgba(255,255,255,.10);transform:rotate(-7deg);
  box-shadow:0 16px 36px rgba(0,0,0,.36);overflow:hidden;
}
.trace{position:absolute;background:rgba(255,255,255,.20);height:2px}
.t1{width:118px;top:26px;left:16px}
.t2{width:82px;top:70px;left:44px}
.t3{width:132px;top:108px;left:20px}
.pad{position:absolute;width:12px;height:12px;border-radius:50%;border:2px solid #d9c37a;background:rgba(0,0,0,.25)}
.p1{top:20px;left:150px}.p2{top:64px;left:150px}.p3{top:102px;left:170px}
.smd{position:absolute;background:#2b2b2b;border:1px solid #555;border-radius:2px}
.s1{width:26px;height:12px;top:88px;left:46px}
.s2{width:16px;height:16px;top:34px;left:104px}
.s3{width:30px;height:14px;top:116px;left:100px}
.s4{width:12px;height:20px;top:56px;left:206px}

/* ---------- sections ---------- */
.section{padding:86px 0}
.section.alt{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 52px}
.sec-tag{
  display:inline-block;font-size:11.5px;letter-spacing:2.4px;color:var(--accent);
  font-weight:700;margin-bottom:12px
}
.sec-head h2{font-size:32px;color:var(--navy);line-height:1.32;margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:15px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:all .25s
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.ico{
  width:44px;height:44px;border-radius:11px;background:var(--accent-soft);color:var(--accent);
  display:grid;place-items:center;font-size:20px;margin-bottom:18px
}
.card h3{font-size:17.5px;color:var(--navy);margin-bottom:10px}
.card p{font-size:14px;color:var(--muted);margin-bottom:16px}
.card ul{display:flex;flex-direction:column;gap:7px}
.card li{font-size:13px;color:var(--navy-2);padding-left:16px;position:relative}
.card li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--accent)}

/* capabilities */
.cap-wrap{display:grid;grid-template-columns:1.25fr .75fr;gap:36px;align-items:start}
.cap-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cap-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 22px;
  display:flex;flex-direction:column;gap:5px
}
.cap-item b{font-size:15px;color:var(--navy)}
.cap-item span{font-size:13px;color:var(--muted)}
.cap-note{
  background:var(--navy);color:#fff;border-radius:var(--radius);padding:32px 28px;
}
.cap-note h3{font-size:20px;margin-bottom:12px}
.cap-note p{color:#c2d4e8;font-size:14px;margin-bottom:22px}

/* process */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 20px;
  position:relative;transition:all .25s
}
.step:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:var(--shadow)}
.num{font-size:26px;font-weight:700;color:var(--accent);display:block;margin-bottom:10px}
.step h4{font-size:15.5px;color:var(--navy);margin-bottom:8px}
.step p{font-size:13px;color:var(--muted)}

/* quality */
.qc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px}
.qc h4{font-size:16px;color:var(--navy);margin-bottom:10px}
.qc p{font-size:13.5px;color:var(--muted)}
.cert-note{
  text-align:center;margin-top:26px;font-size:12.5px;color:#9aa8bb;font-style:italic
}

/* about */
.about-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
.about-text h2{font-size:30px;color:var(--navy);margin:12px 0 18px}
.about-text p{font-size:15px;color:var(--muted);margin-bottom:16px}
.about-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.about-tags span{
  background:var(--accent-soft);color:#c2410c;font-size:13px;padding:7px 15px;border-radius:20px
}
.about-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.about-card h3{font-size:17px;color:var(--navy);margin-bottom:16px}
.about-card li{
  padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--navy-2)
}
.about-card li:last-child{border:0}

/* CTA + form */
.cta-section{background:var(--navy);padding:82px 0;color:#fff}
.cta-wrap{display:grid;grid-template-columns:1fr .85fr;gap:48px;align-items:center}
.cta-text h2{font-size:31px;margin-bottom:14px;line-height:1.3}
.cta-text p{color:#c6d6e8;font-size:15px;margin-bottom:26px}
.contact-list{display:flex;flex-direction:column;gap:14px}
.contact-list div{display:flex;flex-direction:column}
.contact-list span{font-size:12px;color:#8fa8c2;letter-spacing:.6px}
.contact-list b{font-size:15px;color:#fff;font-weight:600}
.cta-form{background:#fff;border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-lg)}
.cta-form h3{font-size:19px;color:var(--navy);margin-bottom:18px}
.cta-form input,.cta-form select,.cta-form textarea{
  width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 13px;
  font-size:14px;margin-bottom:13px;font-family:inherit;color:var(--ink);background:#fff;
}
.cta-form input:focus,.cta-form select:focus,.cta-form textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(249,115,22,.12)
}
.cta-form textarea{resize:vertical}
.form-note{font-size:12.5px;color:var(--accent);margin-top:10px;min-height:16px;text-align:center}

/* footer */
.footer{background:#081c33;color:#9fb3c8;padding:38px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.f-brand{display:flex;align-items:center;gap:12px}
.f-brand div{display:flex;flex-direction:column}
.f-brand b{color:#fff;font-size:14.5px}
.f-brand span{font-size:12px}
.f-links{display:flex;gap:22px;font-size:13.5px}
.f-links a:hover{color:var(--accent)}
.f-copy{font-size:12.5px;color:#6b829a}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1;height:250px}
  .pcb{width:210px;height:126px;right:10px}
  .grid-3{grid-template-columns:1fr 1fr}
  .cap-wrap{grid-template-columns:1fr}
  .cap-list{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .about-wrap{grid-template-columns:1fr}
  .cta-wrap{grid-template-columns:1fr}
}
@media(max-width:720px){
  .nav{
    position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:flex-start;gap:0;padding:0 24px;border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s
  }
  .nav.open{max-height:420px;padding:12px 24px 20px}
  .nav a{padding:11px 0;width:100%;border-bottom:1px solid #f1f5f9}
  .btn-nav{margin-top:10px;text-align:center}
  .menu-btn{display:flex}
  .hero{padding:56px 0 50px}
  .hero h1{font-size:31px}
  .hero-stats{gap:24px}
  .hero-stats b{font-size:22px}
  .section{padding:60px 0}
  .sec-head h2{font-size:25px}
  .grid-3,.cap-list,.steps{grid-template-columns:1fr}
  .cta-section{padding:60px 0}
  .footer-inner{flex-direction:column;text-align:center}
  .f-links{flex-wrap:wrap;justify-content:center}
}