:root {
  --c-brand: #0a4ea3;
  --c-brand-2: #1565c9;
  --c-accent: #00b3a4;
  --c-dark: #0f1f3d;
  --c-dark-2: #16294d;
  --c-text: #22324a;
  --c-muted: #6b7a90;
  --c-line: #e3e9f2;
  --c-bg: #ffffff;
  --c-bg-soft: #f5f8fc;
  --c-bg-tint: #eef4fb;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 16px rgba(15, 31, 61, .06);
  --shadow-md: 0 10px 30px rgba(15, 31, 61, .10);
  --shadow-lg: 0 20px 50px rgba(15, 31, 61, .14);
  --maxw: 1200px;
  --hdr-h: 72px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: 84px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--tint { background: var(--c-bg-tint); }
.center { text-align: center; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--hdr-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--c-line);
  z-index: 1000;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.brand img { height: 38px; width: auto; }
.brand .brand-name { font-size: 19px; color: var(--c-dark); letter-spacing: .3px; }
.brand .brand-name small { display: block; font-size: 11px; font-weight: 600; color: var(--c-muted); letter-spacing: 2px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 14px; border-radius: 8px; font-weight: 600; font-size: 15px;
  color: var(--c-text); transition: .2s;
}
.nav-links a:hover { color: var(--c-brand); background: var(--c-bg-tint); }
.nav-links a.active { color: var(--c-brand); }
.nav-cta {
  margin-left: 8px; padding: 10px 20px; border-radius: 999px;
  background: var(--c-brand); color: #fff !important; font-weight: 700;
  box-shadow: var(--shadow-sm); transition: .2s;
}
.nav-cta:hover { background: var(--c-brand-2); transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--c-dark); margin: 5px 0; border-radius: 2px; transition: .25s; }

/* ---------- Hero / Slider ---------- */
.hero { position: relative; margin-top: var(--hdr-h); height: 560px; overflow: hidden; background: var(--c-dark); }
.slides { position: absolute; inset: 0; }
.slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity .8s ease;
  background-size: cover; background-position: center; display: flex; align-items: center;
}
.slide::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,31,61,.82) 0%, rgba(15,31,61,.45) 55%, rgba(15,31,61,.15) 100%); }
.slide.active { opacity: 1; }
.slide .hero-inner { position: relative; z-index: 2; color: #fff; max-width: 640px; }
.hero-inner .eyebrow { display: inline-block; padding: 6px 14px; border-radius: 999px; background: rgba(0,179,164,.18); color: #7ff0e6; font-weight: 700; font-size: 13px; letter-spacing: 1px; margin-bottom: 18px; }
.hero-inner h1 { font-size: 44px; line-height: 1.2; font-weight: 800; margin-bottom: 18px; }
.hero-inner p { font-size: 18px; color: #d7e2f2; margin-bottom: 28px; max-width: 560px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 13px 26px; border-radius: 999px; font-weight: 700;
  transition: .2s; cursor: pointer; border: 2px solid transparent; font-size: 15px;
}
.btn--primary { background: var(--c-accent); color: #fff; }
.btn--primary:hover { background: #00cdba; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { border-color: rgba(255,255,255,.6); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.12); }
.btn--brand { background: var(--c-brand); color: #fff; }
.btn--brand:hover { background: var(--c-brand-2); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.slider-dots { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 3; }
.slider-dots button { width: 12px; height: 12px; border-radius: 50%; border: 0; background: rgba(255,255,255,.45); cursor: pointer; transition: .2s; }
.slider-dots button.active { background: var(--c-accent); width: 30px; border-radius: 8px; }
.hero-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 3; width: 46px; height: 46px; border-radius: 50%; border: 0; background: rgba(255,255,255,.15); color: #fff; font-size: 22px; cursor: pointer; transition: .2s; }
.hero-arrow:hover { background: rgba(255,255,255,.32); }
.hero-arrow.prev { left: 22px; }
.hero-arrow.next { right: 22px; }

/* ---------- Section heading ---------- */
.sec-head { max-width: 760px; margin: 0 auto 50px; text-align: center; }
.sec-head .kicker { display: inline-block; color: var(--c-accent); font-weight: 800; letter-spacing: 2px; font-size: 13px; margin-bottom: 12px; }
.sec-head h2 { font-size: 34px; color: var(--c-dark); font-weight: 800; margin-bottom: 14px; }
.sec-head p { color: var(--c-muted); font-size: 16px; }

/* ---------- Intro strip ---------- */
.intro-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.intro-grid img { border-radius: var(--radius); box-shadow: var(--shadow-md); width: 100%; }
.intro-text h2 { font-size: 30px; color: var(--c-dark); margin-bottom: 16px; }
.intro-text p { color: var(--c-muted); margin-bottom: 16px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.stat { background: var(--c-bg-soft); border: 1px solid var(--c-line); border-radius: var(--radius-sm); padding: 18px; text-align: center; }
.stat b { display: block; font-size: 26px; color: var(--c-brand); }
.stat span { font-size: 13px; color: var(--c-muted); }

/* ---------- Cards grids ---------- */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm); transition: .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--c-brand); }
.card .ic { width: 54px; height: 54px; border-radius: 12px; background: var(--c-bg-tint); color: var(--c-brand); display: grid; place-items: center; margin-bottom: 16px; }
.card .ic svg { width: 28px; height: 28px; }
.card h3 { font-size: 19px; color: var(--c-dark); margin-bottom: 8px; }
.card p { color: var(--c-muted); font-size: 15px; }

/* product card */
.pcard { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: .25s; display: flex; flex-direction: column; }
.pcard:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.pcard .thumb { aspect-ratio: 4/3; background: var(--c-bg-soft); display: grid; place-items: center; overflow: hidden; border-bottom: 1px solid var(--c-line); }
.pcard .thumb img { width: 100%; height: 100%; object-fit: cover; transition: .3s; }
.pcard:hover .thumb img { transform: scale(1.05); }
.pcard .body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.pcard .tag { align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--c-accent); background: #e6fbf8; padding: 4px 10px; border-radius: 999px; margin-bottom: 10px; }
.pcard h3 { font-size: 17px; color: var(--c-dark); margin-bottom: 8px; line-height: 1.4; }
.pcard p { color: var(--c-muted); font-size: 14px; flex: 1; }

/* ---------- Feature / why-us ---------- */
.feature-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.feat { text-align: center; padding: 28px 18px; border-radius: var(--radius); background: #fff; border: 1px solid var(--c-line); box-shadow: var(--shadow-sm); }
.feat .num { font-size: 30px; font-weight: 800; color: var(--c-brand); margin-bottom: 8px; }
.feat h4 { color: var(--c-dark); margin-bottom: 6px; }
.feat p { color: var(--c-muted); font-size: 14px; }

/* ---------- News ---------- */
.news-card { display: grid; grid-template-columns: 220px 1fr; gap: 22px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: .25s; }
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.news-card .date { background: var(--c-brand); color: #fff; display: grid; place-items: center; padding: 20px; text-align: center; }
.news-card .date b { font-size: 30px; display: block; }
.news-card .date span { font-size: 13px; opacity: .85; }
.news-card .body { padding: 22px 24px 22px 0; }
.news-card .body .cat { font-size: 12px; color: var(--c-accent); font-weight: 700; }
.news-card .body h3 { color: var(--c-dark); font-size: 19px; margin: 6px 0 8px; }
.news-card .body p { color: var(--c-muted); font-size: 14px; }

/* ---------- CTA ---------- */
.cta { background: linear-gradient(120deg, var(--c-dark), var(--c-brand)); color: #fff; border-radius: var(--radius); padding: 54px; text-align: center; }
.cta h2 { font-size: 30px; margin-bottom: 12px; }
.cta p { color: #cfe0f5; margin-bottom: 26px; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { margin-top: var(--hdr-h); background: linear-gradient(120deg, var(--c-dark), var(--c-brand)); color: #fff; padding: 64px 0; }
.page-hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 10px; }
.page-hero p { color: #cfe0f5; max-width: 680px; }
.breadcrumb { font-size: 13px; color: #9fb6d6; margin-bottom: 14px; }
.breadcrumb a:hover { color: #fff; }

/* ---------- Tables / specs ---------- */
.spectable { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.spectable th, .spectable td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--c-line); font-size: 15px; }
.spectable th { background: var(--c-bg-soft); color: var(--c-dark); font-weight: 700; width: 220px; }
.spectable tr:last-child td, .spectable tr:last-child th { border-bottom: 0; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info .item { display: flex; gap: 14px; margin-bottom: 22px; }
.contact-info .item .ic { width: 44px; height: 44px; flex: none; border-radius: 10px; background: var(--c-bg-tint); color: var(--c-brand); display: grid; place-items: center; }
.contact-info .item h4 { color: var(--c-dark); font-size: 15px; margin-bottom: 2px; }
.contact-info .item p { color: var(--c-muted); }
.form { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
.form label { display: block; font-weight: 600; font-size: 14px; margin: 14px 0 6px; color: var(--c-dark); }
.form input, .form textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--c-line); border-radius: 10px; font-family: inherit; font-size: 15px; transition: .2s; }
.form input:focus, .form textarea:focus { outline: 0; border-color: var(--c-brand); box-shadow: 0 0 0 3px rgba(10,78,163,.12); }
.form textarea { min-height: 110px; resize: vertical; }
.form .btn { margin-top: 18px; width: 100%; border: 0; }
.map-note { margin-top: 18px; padding: 16px; background: var(--c-bg-soft); border-radius: var(--radius-sm); color: var(--c-muted); font-size: 14px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-dark); color: #c4d2e6; padding: 56px 0 22px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.footer-grid .f-brand img { height: 40px; margin-bottom: 14px; }
.footer-grid .f-brand p { font-size: 14px; color: #9fb1cc; max-width: 280px; }
.footer-grid h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-grid a { display: block; color: #9fb1cc; font-size: 14px; padding: 5px 0; transition: .2s; }
.footer-grid a:hover { color: #fff; padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 38px; padding-top: 22px; text-align: center; font-size: 13px; color: #8a9cba; }
.footer-bottom a { color: #8a9cba; }
.footer-bottom a:hover { color: #fff; }
.badges { margin-top: 10px; display: flex; gap: 14px; justify-content: center; align-items: center; flex-wrap: wrap; }
.badges a, .badges span { display: inline-flex; align-items: center; gap: 6px; color: #8a9cba; font-size: 13px; }
.badges .gov-badge { border: 1px solid rgba(255,255,255,.18); padding: 5px 12px; border-radius: 6px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-3, .grid-4, .feature-row { grid-template-columns: repeat(2, 1fr); }
  .intro-grid, .contact-grid { grid-template-columns: 1fr; }
  .intro-grid img { order: -1; }
}
@media (max-width: 720px) {
  .nav-links {
    position: fixed; top: var(--hdr-h); right: 0; width: 260px; height: calc(100vh - var(--hdr-h);
    background: #fff; flex-direction: column; align-items: stretch; padding: 16px;
    box-shadow: var(--shadow-lg); transform: translateX(110%); transition: .3s; gap: 2px;
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .nav-toggle { display: block; }
  .hero { height: 480px; }
  .hero-inner h1 { font-size: 32px; }
  .section { padding: 60px 0; }
  .sec-head h2 { font-size: 27px; }
  .grid-3, .grid-4, .feature-row, .grid-2 { grid-template-columns: 1fr; }
  .news-card { grid-template-columns: 1fr; }
  .news-card .body { padding: 0 22px 22px; }
  .cta { padding: 36px 22px; }
  .page-hero h1 { font-size: 30px; }
}

/* ===== 产品详情页 ===== */
.pd-hero{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.pd-hero .thumb img{width:100%;border-radius:16px;border:1px solid #eef1f6;background:#f7f9fc;}
.pd-hero .info .tag{display:inline-block;background:var(--c-accent);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:14px;}
.pd-hero .info h2{font-size:26px;margin:6px 0 12px;}
.pd-hero .info p{color:var(--c-muted);line-height:1.7;margin-bottom:18px;}
.pd-hero .info .btn{margin-right:12px;}
.feature-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:12px 22px;}
.feature-list li{position:relative;padding-left:26px;line-height:1.6;color:var(--c-ink);}
.feature-list li:before{content:"\2713";position:absolute;left:0;top:0;color:var(--c-accent);font-weight:800;}
.spec-table{width:100%;border-collapse:collapse;border:1px solid #eceff4;border-radius:12px;overflow:hidden;background:#fff;}
.spec-table th,.spec-table td{text-align:left;padding:13px 16px;font-size:15px;border-bottom:1px solid #eceff4;}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none;}
.spec-table th{width:200px;background:#f7f9fc;color:var(--c-ink);font-weight:600;}
.spec-table td{color:var(--c-muted);}
@media (max-width:760px){
  .pd-hero{grid-template-columns:1fr;gap:24px;}
  .feature-list{grid-template-columns:1fr;}
  .spec-table th{width:120px;}
}

/* ===== 新闻详情页 ===== */
.prose{max-width:820px;margin:0 auto;font-size:17px;line-height:1.95;color:var(--c-text);}
.prose p{margin-bottom:20px;}
.prose .lead{font-size:19px;color:var(--c-muted);line-height:1.8;margin-bottom:24px;}
.prose h3{font-size:21px;margin:30px 0 14px;color:var(--c-brand);}
.news-meta{display:inline-block;margin-top:10px;padding:4px 14px;border-radius:999px;background:var(--c-bg-tint);color:var(--c-brand);font-size:14px;font-weight:600;}
.news-card{transition:transform .2s ease, box-shadow .2s ease;}
a.news-card:hover, a.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
a.news-card, a.card{text-decoration:none;color:inherit;display:block;}