:root{
  --bg:#ffffff;
  --bg-alt:#f4f7fb;
  --ink:#0f1b2d;
  --ink-soft:#4a5a72;
  --line:#e3e9f2;
  --brand:#1457d6;
  --brand-2:#0a3aa8;
  --accent:#00b4d8;
  --ok:#16a34a;
  --shadow:0 10px 30px rgba(15,27,45,.08);
  --radius:16px;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.18em;font-weight:700;color:var(--brand);margin-bottom:10px}
.grad{background:linear-gradient(90deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 20px;border-radius:10px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s;font-family:inherit}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:#fff;color:var(--brand-2)}
.btn-light:hover{transform:translateY(-1px)}
.btn-lg{padding:14px 26px;font-size:16px}
.btn-block{width:100%}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand-mark{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-size:13px;font-weight:800}
.brand-text{font-size:17px}
.nav-links{display:flex;align-items:center;gap:22px;font-size:15px;font-weight:500}
.nav-links a:hover{color:var(--brand)}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink)}

/* Hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 80% -10%,rgba(20,87,214,.10),transparent),linear-gradient(180deg,#eef4ff,#fff)}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:72px 20px 40px}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.1;font-weight:800;letter-spacing:-.5px}
.lead{margin:20px 0;color:var(--ink-soft);font-size:18px;max-width:540px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{list-style:none;display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;font-size:13px;color:var(--ink-soft);font-weight:600}
.hero-trust li{background:#fff;border:1px solid var(--line);padding:7px 12px;border-radius:20px}
.hero-visual{display:grid;place-items:center}
.pcb-board{position:relative;width:320px;height:240px;border-radius:18px;background:linear-gradient(145deg,#0a3aa8,#0e6fb8);box-shadow:var(--shadow);overflow:hidden}
.pcb-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:22px 22px}
.pcb-chip{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:70px;height:70px;background:#0b1220;border:2px solid #00b4d8;border-radius:8px;box-shadow:0 0 0 6px rgba(0,180,216,.15)}
.pcb-trace{position:absolute;height:2px;background:linear-gradient(90deg,#00b4d8,transparent)}
.pcb-trace.t1{top:38%;left:8%;width:60%}
.pcb-trace.t2{top:64%;left:24%;width:64%;transform:rotate(8deg)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:30px 20px 50px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-size:30px;color:var(--brand);font-weight:800}
.stat span{font-size:13px;color:var(--ink-soft)}

/* Sections */
.section{padding:76px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:660px;margin:0 auto 44px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.section-head p{color:var(--ink-soft);margin-top:10px;font-size:16px}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-4px);border-color:var(--brand)}
.card-ico{font-size:30px;width:54px;height:54px;display:grid;place-items:center;background:var(--bg-alt);border-radius:12px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:14px}
.card-link{display:inline-block;margin-top:14px;color:var(--brand);font-weight:600;font-size:14px}

/* Capability */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cap{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;box-shadow:var(--shadow)}
.cap b{display:block;font-size:22px;color:var(--brand-2);font-weight:800}
.cap span{font-size:13px;color:var(--ink-soft)}

/* Process */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative;box-shadow:var(--shadow)}
.step span{font-size:13px;font-weight:800;color:var(--accent)}
.step h4{margin:8px 0 6px;font-size:17px}
.step p{font-size:13px;color:var(--ink-soft)}

/* Industries */
.ind-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.ind{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;text-align:center;font-size:15px;font-weight:600;box-shadow:var(--shadow);transition:.2s}
.ind:hover{transform:translateY(-3px);border-color:var(--brand);color:var(--brand)}
.ind span{display:block;margin-top:8px}

/* About */
.about{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.about h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;margin-bottom:14px}
.about p{color:var(--ink-soft);margin-bottom:16px}
.about-list{list-style:none;display:grid;gap:10px;margin-bottom:22px;font-size:15px}
.about-list li{color:var(--ink-soft)}
.about-panel{background:linear-gradient(160deg,#0a3aa8,#0e6fb8);border-radius:20px;padding:28px;color:#fff;box-shadow:var(--shadow)}
.panel-row{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:15px}
.panel-row:last-child{border-bottom:none}
.panel-row b{font-weight:700;opacity:.85}
.panel-row span{font-weight:600}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--brand),var(--accent));color:#fff}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:46px 20px;flex-wrap:wrap}
.cta-inner h2{font-size:28px;font-weight:800}
.cta-inner p{opacity:.92;margin-top:6px}

/* Contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;margin-bottom:12px}
.contact p{color:var(--ink-soft);margin-bottom:16px}
.contact-list{list-style:none;display:grid;gap:12px;font-size:15px}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);display:grid;gap:14px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(20,87,214,.12)}
.form-hint{font-size:14px;color:var(--ok);min-height:18px}

/* Footer */
.site-footer{background:#0b1220;color:#c7d2e0;padding:54px 0 24px}
.footer-inner{display:grid;grid-template-columns:1fr 1.4fr;gap:30px}
.footer-desc{margin-top:12px;font-size:14px;color:#8a97ab}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.footer-cols h5{color:#fff;margin-bottom:12px;font-size:15px}
.footer-cols a{display:block;color:#8a97ab;font-size:14px;padding:4px 0}
.footer-cols a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1c2740;margin-top:34px;padding-top:18px;font-size:13px;color:#6b788c;text-align:center}

/* Responsive */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;padding-top:50px}
  .hero-visual{order:-1}
  .cards,.cap-grid,.steps,.ind-grid{grid-template-columns:repeat(2,1fr)}
  .about,.contact{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav-links{position:fixed;top:66px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 20px;gap:14px;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:.25s;box-shadow:var(--shadow)}
  .nav-links.open{transform:translateY(0)}
  .nav-toggle{display:block}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .cards,.cap-grid,.steps,.ind-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
}