:root{
  --brand:#1B4C8C;
  --brand-dark:#0C2B52;
  --brand-mid:#2E6DB4;
  --brand-soft:#EAF2FB;
  --ink:#16202E;
  --muted:#5F6B7A;
  --line:#E4E9F0;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;
  --radius:10px;
  --max:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.75;
  -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}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px}
.logo svg{height:34px;width:auto}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text b{font-size:19px;letter-spacing:.2px;color:var(--brand);font-weight:600}
.logo-text span{font-size:12px;color:var(--muted);letter-spacing:1.5px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:15px;color:#33404F;padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
.nav-links a:hover{color:var(--brand)}
.nav-links a.active{color:var(--brand);border-bottom-color:var(--brand);font-weight:500}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-btn{
  border:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:13px;padding:5px 12px;border-radius:20px;cursor:pointer;transition:.2s;
}
.lang-btn:hover{border-color:var(--brand);color:var(--brand)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;transition:.25s}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:6px;font-size:15px;font-weight:500;
  transition:.2s;border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-line{border-color:var(--brand);color:var(--brand)}
.btn-line:hover{background:var(--brand);color:#fff}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#0C2B52 0%,#123B6E 55%,#1B4C8C 100%);
  color:#fff;
}
.hero::after{
  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:56px 56px;
  mask-image:radial-gradient(circle at 70% 40%,#000 0%,transparent 72%);
}
.hero .wrap{position:relative;z-index:2;padding-top:88px;padding-bottom:96px}
.hero-inner{max-width:660px}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2px;
  color:#9FC4EE;border:1px solid rgba(159,196,238,.4);
  padding:4px 12px;border-radius:20px;margin-bottom:26px;
}
.hero h1{font-size:44px;line-height:1.3;font-weight:600;letter-spacing:.5px}
.hero h1 em{font-style:normal;color:#8FBEF0}
.hero p{margin-top:22px;font-size:17px;color:#C8D8EA;line-height:1.85;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}
.hero-stats{
  display:flex;gap:56px;margin-top:64px;padding-top:32px;
  border-top:1px solid rgba(255,255,255,.14);flex-wrap:wrap;
}
.hero-stats div b{display:block;font-size:28px;font-weight:600;color:#fff}
.hero-stats div span{font-size:13px;color:#9FB6CE}

/* ---------- sections ---------- */
section{padding:88px 0}
.section-soft{background:var(--bg-soft)}
.section-head{max-width:680px;margin-bottom:52px}
.section-head .kicker{
  font-size:13px;letter-spacing:2px;color:var(--brand);
  font-weight:600;margin-bottom:12px;display:block;
}
.section-head h2{font-size:32px;line-height:1.35;font-weight:600}
.section-head p{margin-top:16px;color:var(--muted);font-size:16px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- cards ---------- */
.grid{display:grid;gap:24px}
.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);
  padding:30px 26px;transition:.25s;
}
.card:hover{border-color:#C7D6E8;box-shadow:0 10px 28px rgba(16,42,74,.07);transform:translateY(-2px)}
.card h3{font-size:18px;font-weight:600;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--muted);line-height:1.8}
.card .ico{
  width:46px;height:46px;border-radius:10px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.card .ico svg{width:24px;height:24px;stroke:var(--brand);fill:none;stroke-width:1.6}

/* ---------- industry ---------- */
.industry{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.25s}
.industry:hover{box-shadow:0 12px 32px rgba(16,42,74,.09)}
.industry .top{height:132px;display:flex;align-items:center;justify-content:center;background:var(--brand-soft)}
.industry .top svg{width:56px;height:56px;stroke:var(--brand);fill:none;stroke-width:1.3}
.industry .body{padding:24px}
.industry h3{font-size:17px;font-weight:600;margin-bottom:8px}
.industry p{font-size:14px;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{font-size:12.5px;color:var(--brand);background:var(--brand-soft);border-radius:4px;padding:4px 10px}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.split ul{list-style:none;margin-top:24px}
.split li{position:relative;padding-left:28px;margin-bottom:14px;font-size:15px;color:#3A4757}
.split li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:50%;
  background:var(--brand-soft);border:2px solid var(--brand);
}
.checklist{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;margin-top:26px}
.checklist div{display:flex;gap:10px;font-size:14.5px;color:#3A4757}
.checklist svg{width:18px;height:18px;flex:0 0 18px;stroke:var(--brand);fill:none;stroke-width:2;margin-top:4px}
.panel{
  background:var(--brand-soft);border-radius:var(--radius);padding:40px 36px;
  border:1px solid #D8E6F6;
}
.panel h3{font-size:19px;margin-bottom:18px}
.panel .row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px dashed #C9D9EC;font-size:14.5px}
.panel .row:last-child{border:0}
.panel .row b{color:var(--brand);font-weight:600}

/* ---------- table ---------- */
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff}
.spec-table th,.spec-table td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line)}
.spec-table th{background:var(--bg-soft);font-weight:600;font-size:13.5px;color:#455264;letter-spacing:.4px}
.spec-table tr:hover td{background:#FAFCFF}

/* ---------- timeline / steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{position:relative;padding:26px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:4px;padding:3px 9px;display:inline-block;margin-bottom:14px;
}
.step h4{font-size:16px;margin-bottom:8px;font-weight:600}
.step p{font-size:13.8px;color:var(--muted)}

/* ---------- faq ---------- */
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{
  cursor:pointer;font-weight:500;font-size:16px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:12px;color:var(--muted);font-size:14.5px}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(120deg,#0C2B52,#1B4C8C);
  color:#fff;padding:72px 0;text-align:center;
}
.cta h2{font-size:30px;font-weight:600}
.cta p{margin-top:14px;color:#C3D5E9;font-size:16px}
.cta .btn{margin-top:30px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px}
.info-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.info-item:last-child{border:0}
.info-item .ico{
  width:40px;height:40px;flex:0 0 40px;border-radius:8px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;
}
.info-item .ico svg{width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.6}
.info-item h4{font-size:15px;font-weight:600;margin-bottom:4px}
.info-item p{font-size:14.5px;color:var(--muted)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:#455264;margin-bottom:7px}
.field input,.field textarea,.field select{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:6px;
  font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;transition:.2s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,76,140,.08);
}
.field textarea{min-height:120px;resize:vertical}
.form-note{font-size:12.5px;color:#8A95A3;margin-top:14px}

/* ---------- footer ---------- */
.site-footer{background:#0B2138;color:#9FB2C6;padding:56px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.site-footer h5{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.5px}
.site-footer a{display:block;padding:5px 0;color:#9FB2C6;transition:.2s}
.site-footer a:hover{color:#fff}
.footer-bottom{padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7A8FA6}
.footer-bottom a{color:inherit;text-decoration:none}
.footer-bottom a:hover{color:#C8D8EA;text-decoration:underline}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero h1{font-size:32px}
  .split,.contact-grid,.grid-4,.grid-3{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .grid-4 .card:last-child{grid-column:span 2}
}
@media (max-width:640px){
  .nav-links{
    position:absolute;top:72px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;gap:0;
    padding:8px 24px 20px;border-bottom:1px solid var(--line);display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .hero .wrap{padding-top:56px;padding-bottom:64px}
  .hero h1{font-size:27px}
  .hero p{font-size:15px}
  .hero-stats{gap:28px;margin-top:40px}
  .hero-stats div b{font-size:22px}
  section{padding:56px 0}
  .section-head h2{font-size:24px}
  .grid-2,.grid-3,.grid-4,.split,.contact-grid,.steps,.form-row,.checklist{grid-template-columns:1fr}
  .grid-4 .card:last-child{grid-column:auto}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .panel{padding:28px 22px}
}