:root {
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --ink: #17233d;
  --muted: #5c6b85;
  --bg: #ffffff;
  --bg-alt: #f4f7fc;
  --border: #e3e9f2;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.7;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

/* header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 42px; height: 42px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), #4f8cff); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; letter-spacing: 1px; }
.brand-text { font-weight: 700; font-size: 15px; line-height: 1.3; }
.brand-text small { font-weight: 400; color: var(--muted); font-size: 11px; }
.nav { display: flex; gap: 26px; font-size: 15px; }
.nav a:hover { color: var(--primary); }
.nav-cta { background: var(--primary); color: #fff !important; padding: 7px 16px; border-radius: 8px; }
.nav-cta:hover { background: var(--primary-dark); }

/* mega menu */
.nav-item { position: relative; }
.nav-item > a { display: block; line-height: 68px; }
.has-drop > a::after { content: none; }
.mega { display: none; position: absolute; top: 68px; left: 50%; transform: translateX(-50%); background: #fff; border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 18px 40px rgba(23,35,61,.12); padding: 22px 26px; z-index: 60; }
.nav-item:hover .mega { display: flex; gap: 34px; }
.mega-col { min-width: 210px; }
.mega-col h5, .mega-industries h5 { font-size: 13px; color: var(--muted); margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--border); letter-spacing: 1px; }
.mega-col a { display: block; padding: 7px 10px; margin: 0 -10px; border-radius: 8px; font-size: 14.5px; white-space: nowrap; }
.mega-col a i { display: block; font-style: normal; font-size: 12px; color: var(--muted); }
.mega-col a:hover { background: #eef4ff; color: var(--primary); }
.mega-industries { width: 560px; }
.mega-industries .ind-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px 18px; }
.mega-industries .ind-list a { padding: 6px 8px; font-size: 14px; border-radius: 6px; }
.mega-industries .ind-list a:hover { background: #eef4ff; color: var(--primary); }

/* hero */
.hero { background: linear-gradient(160deg, #eef4ff 0%, #ffffff 60%); padding: 90px 0 70px; text-align: center; }
.hero h1 { font-size: 44px; letter-spacing: 2px; }
.hero h1 em { font-style: normal; color: var(--primary); }
.hero-sub { margin-top: 18px; color: var(--muted); font-size: 18px; }
.hero-actions { margin-top: 34px; display: flex; gap: 16px; justify-content: center; }
.btn { padding: 12px 30px; border-radius: 10px; font-size: 16px; transition: .2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { border: 1px solid var(--primary); color: var(--primary); }
.btn-ghost:hover { background: #eaf0ff; }
.hero-stats { margin-top: 56px; display: flex; justify-content: center; gap: 70px; }
.hero-stats b { font-size: 30px; color: var(--primary); display: block; }
.hero-stats span { color: var(--muted); font-size: 14px; }

/* sections */
.section { padding: 76px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { text-align: center; font-size: 30px; }
.section-sub { text-align: center; color: var(--muted); margin-top: 8px; margin-bottom: 44px; }
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.group-title { margin: 40px 0 20px; font-size: 20px; color: var(--primary-dark); }
.prod-grid { margin-bottom: 10px; }

/* domains */
.domain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.domain { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; transition: .2s; }
.domain:hover { border-color: #c7d7f7; box-shadow: 0 8px 20px rgba(29,78,216,.08); }
.domain b { display: block; font-size: 15.5px; }
.domain span { color: var(--muted); font-size: 13px; }

/* industries */
.ind-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.ind-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 20px 18px; transition: .2s; }
.ind-card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(29,78,216,.10); border-color: #c7d7f7; }
.ind-card b { display: block; font-size: 16px; margin-bottom: 6px; color: var(--primary-dark); }
.ind-card span { color: var(--muted); font-size: 13px; line-height: 1.6; }

/* about */
.about-wrap .about-text { max-width: 900px; margin: 0 auto 16px; color: #33415e; text-align: justify; }
.about-wrap .steps { margin-top: 40px; }

/* cards */
.card { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 30px 26px; transition: .2s; display: block; }
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(29,78,216,.10); border-color: #c7d7f7; }
.card-icon { font-size: 34px; }
.card h3 { margin: 12px 0 8px; font-size: 19px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card-more { display: inline-block; margin-top: 14px; color: var(--primary); font-size: 14px; }

/* products */
.product { background: #fff; border-radius: 14px; padding: 28px; border: 1px solid var(--border); }
.product h3 { font-size: 18px; }
.product-tag { display: inline-block; margin: 8px 0 10px; padding: 2px 10px; border-radius: 20px; background: #e8efff; color: var(--primary); font-size: 12.5px; }
.product p { color: var(--muted); font-size: 14.5px; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.step { text-align: center; padding: 26px 18px; background: var(--bg-alt); border-radius: 14px; }
.step b { display: inline-flex; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 50%; background: var(--primary); color: #fff; font-size: 17px; }
.step h4 { margin: 12px 0 6px; }
.step p { color: var(--muted); font-size: 13.5px; }

/* solutions page */
.sol-block { padding: 60px 0; border-bottom: 1px solid var(--border); }
.sol-block:last-of-type { border-bottom: none; }
.sol-block h2 { font-size: 26px; margin-bottom: 6px; }
.sol-block .sol-tag { color: var(--primary); font-size: 14px; }
.sol-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 26px; }
.sol-grid h4 { margin-bottom: 8px; font-size: 16px; }
.sol-grid ul { list-style: none; }
.sol-grid li { padding: 7px 0 7px 22px; position: relative; color: var(--muted); font-size: 14.5px; border-bottom: 1px dashed var(--border); }
.sol-grid li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

/* footer */
.site-footer { background: #101a30; color: #b9c5da; padding: 56px 0 0; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1.1fr 1fr 1fr .8fr; gap: 30px; padding-bottom: 36px; }
.site-footer h4 { color: #fff; margin-bottom: 10px; font-size: 16px; }
.site-footer a:hover { color: #fff; }
.site-footer .qr { margin-top: 12px; width: 118px; height: 118px; background: #fff; border-radius: 8px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.site-footer .qr img { width: 100%; height: 100%; object-fit: contain; }
.site-footer .qr-ph { display: none; font-size: 12px; color: #5a6a8a; text-align: center; line-height: 1.6; }
.copyright { border-top: 1px solid #233252; padding: 18px 24px; font-size: 13px; color: #7a88a5; }

@media (max-width: 860px) {
  .nav { display: none; }
  .grid-3, .grid-4, .sol-grid, .steps, .domain-grid { grid-template-columns: 1fr; }
  .ind-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 30px; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; }
}