:root {
  --navy: #0f2b46;
  --navy2: #163d5e;
  --teal: #0f6e56;
  --teal-light: #e1f5ee;
  --blue: #185fa5;
  --blue-light: #e6f1fb;
  --amber: #ba7517;
  --amber-light: #faeeda;
  --ink: #22282e;
  --muted: #5b6670;
  --line: #dde3e8;
  --bg: #f6f8f9;
  --card: #ffffff;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  color: var(--ink);
  background: var(--card);
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* top bar + header */
.topbar { background: var(--navy); color: #cfe0ef; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; padding: 8px 24px; flex-wrap: wrap; gap: 6px; }
.topbar a { color: #fff; }
header.site { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 50; }
header.site .container { display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; flex-wrap: wrap; gap: 12px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 40px; height: 40px; border-radius: 8px; background: var(--navy); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 18px; letter-spacing: 0.5px; }
.logo-text strong { display: block; font-size: 16px; color: var(--navy); line-height: 1.2; }
.logo-text span { font-size: 12px; color: var(--muted); }
nav.main ul { list-style: none; display: flex; gap: 4px; flex-wrap: wrap; }
nav.main a { display: block; padding: 10px 14px; color: var(--ink); font-weight: 500; font-size: 15px; border-radius: 6px; }
nav.main a:hover, nav.main a.active { background: var(--blue-light); color: var(--navy); text-decoration: none; }
.btn-quote { background: var(--teal); color: #fff !important; }
.btn-quote:hover { background: #0c5a47; }

/* hero */
.hero { background: var(--navy); color: #fff; padding: 72px 0 64px; }
.hero h1 { font-size: 40px; line-height: 1.2; max-width: 720px; }
.hero h1 em { color: #7fd7b8; font-style: normal; }
.hero p.lead { margin: 18px 0 28px; max-width: 640px; color: #c8d6e2; font-size: 18px; }
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 26px; border-radius: 8px; font-weight: 600; font-size: 15px; }
.btn.primary { background: #17a06e; color: #fff; }
.btn.primary:hover { background: #12885d; text-decoration: none; }
.btn.ghost { border: 1.5px solid #5a7b96; color: #fff; }
.btn.ghost:hover { background: rgba(255,255,255,0.08); text-decoration: none; }
.hero-stats { display: flex; gap: 40px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats div strong { display: block; font-size: 30px; color: #7fd7b8; }
.hero-stats div span { font-size: 13px; color: #b6c6d4; }

/* sections */
section { padding: 64px 0; }
section.alt { background: var(--bg); }
h2.sec { font-size: 30px; color: var(--navy); margin-bottom: 10px; }
p.sec-sub { color: var(--muted); max-width: 720px; margin-bottom: 36px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 26px; }
.card h3 { color: var(--navy); font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--teal); background: var(--teal-light); padding: 3px 10px; border-radius: 20px; margin-bottom: 12px; }
.card a.more { display: inline-block; margin-top: 12px; font-weight: 600; font-size: 14px; }

/* product page tables */
.spec-table { width: 100%; border-collapse: collapse; margin: 18px 0 8px; font-size: 14.5px; }
.spec-table th { background: var(--navy); color: #fff; text-align: left; padding: 10px 12px; font-weight: 600; }
.spec-table td { border: 1px solid var(--line); padding: 9px 12px; }
.spec-table tr:nth-child(even) td { background: var(--bg); }
.product-block { margin-bottom: 52px; }
.product-block h3 { font-size: 22px; color: var(--navy); margin: 8px 0 6px; }
.product-block h3 .code { color: var(--teal); font-size: 16px; font-weight: 600; margin-left: 8px; }
.product-block p.desc { color: var(--muted); margin-bottom: 6px; }
.anchor-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 34px; }
.anchor-nav a { font-size: 13.5px; padding: 7px 14px; border: 1px solid var(--line); border-radius: 20px; color: var(--navy); }
.anchor-nav a:hover { background: var(--blue-light); text-decoration: none; }

/* applications */
.app-item { display: flex; gap: 16px; align-items: flex-start; }
.app-icon { width: 46px; height: 46px; border-radius: 10px; flex: none; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.i-blue { background: var(--blue-light); }
.i-teal { background: var(--teal-light); }
.i-amber { background: var(--amber-light); }

/* about numbers */
.num-band { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 18px; }
.num-band .card { text-align: center; }
.num-band strong { display: block; font-size: 34px; color: var(--teal); }
.num-band span { color: var(--muted); font-size: 14px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
@media (max-width: 760px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card p { margin: 10px 0; }
.contact-card .k { display: inline-block; width: 110px; font-weight: 600; color: var(--navy); }
.note { background: var(--amber-light); border-left: 4px solid var(--amber); padding: 12px 16px; border-radius: 0 8px 8px 0; font-size: 14px; color: #5c4309; margin: 20px 0; }

/* blog */
.prose { max-width: 780px; }
.prose h2 { font-size: 22px; color: var(--navy); margin: 30px 0 10px; }
.prose h3 { font-size: 18px; color: var(--navy); margin: 22px 0 8px; }
.prose p, .prose li { color: #333a40; }
.prose ul { padding-left: 22px; margin: 10px 0; }
.meta-line { color: var(--muted); font-size: 14px; margin-bottom: 26px; }

/* footer */
footer.site { background: var(--navy); color: #b9c8d6; margin-top: 40px; padding: 48px 0 24px; font-size: 14px; }
footer.site h4 { color: #fff; font-size: 15px; margin-bottom: 12px; }
footer.site a { color: #cfe0ef; }
.fgrid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 30px; }
@media (max-width: 860px) { .fgrid { grid-template-columns: 1fr 1fr; } }
.fbottom { border-top: 1px solid #2c4a66; margin-top: 34px; padding-top: 18px; text-align: center; font-size: 13px; color: #8ba3b8; }