:root{
  --brand:#0a1730;
  --brand-2:#102a52;
  --accent:#1fb6ff;
  --accent-2:#7c5cff;
  --accent-3:#19e3c0;
  --ink:#16233d;
  --muted:#5d6b85;
  --line:#e7edf5;
  --bg:#f4f7fb;
  --card:#ffffff;
  --radius:18px;
  --shadow:0 12px 32px rgba(16,42,82,.08);
  --shadow-lg:0 22px 60px rgba(16,42,82,.18);
  --grad:linear-gradient(120deg,#1fb6ff,#7c5cff);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,92vw);margin:0 auto}
.section{padding:84px 0}
.section.alt{background:linear-gradient(180deg,#fff,#eef4fb)}
.section-head{text-align:center;margin-bottom:46px}
.section-head .eyebrow{display:inline-block;color:var(--accent);font-weight:700;letter-spacing:3px;font-size:13px;margin-bottom:10px}
.section-head h2{font-size:34px;color:var(--brand);font-weight:800;letter-spacing:1px}
.section-head .lead{color:var(--muted);margin-top:12px;max-width:680px;margin-inline:auto}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;transition:.3s;padding:20px 0;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:0 2px 18px rgba(16,42,82,.10)}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.site-header.scrolled{box-shadow:0 6px 26px rgba(16,42,82,.16);padding:12px 0}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:22px;color:var(--brand);letter-spacing:.5px}
.logo svg{width:34px;height:34px;flex:0 0 34px}
.logo img{height:64px;display:block}
@media(max-width:680px){.logo img{height:48px}}
.logo em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:900}
.nav-links{display:flex;gap:30px;align-items:center;margin-left:56px}
.nav-links a{color:var(--ink);font-weight:600;font-size:16px;position:relative;padding:6px 0;transition:.2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--grad);transition:.25s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a.active{color:var(--accent)}
.btn{display:inline-block;background:var(--grad);color:#fff;padding:12px 28px;border-radius:999px;font-weight:700;
  box-shadow:0 10px 24px rgba(31,182,255,.35);transition:.25s;border:none;cursor:pointer;font-size:15px}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(124,92,255,.45)}
.btn.ghost{background:transparent;border:2px solid rgba(255,255,255,.7);box-shadow:none}
.btn.ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}
.btn.solid{background:var(--brand);box-shadow:0 10px 24px rgba(16,42,82,.25)}
.nav-toggle{display:none;background:none;border:none;color:var(--brand);font-size:26px;cursor:pointer;z-index:60}
.lang-switch{margin-left:auto;display:inline-flex;align-items:center;font-weight:700;color:var(--accent);border:1.5px solid var(--accent);border-radius:999px;padding:5px 14px;font-size:13px;white-space:nowrap;transition:.2s}
.lang-switch:hover{background:var(--accent);color:#fff}

/* Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(900px 500px at 80% 20%,rgba(124,92,255,.35),transparent 60%),
  radial-gradient(800px 600px at 15% 85%,rgba(31,182,255,.30),transparent 60%),
  linear-gradient(135deg,#0a1730,#102a52 60%,#0b3a66)}
.hero-grid{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:46px 46px;mask-image:radial-gradient(circle at 50% 40%,#000,transparent 80%)}
.hero .container{position:relative;z-index:2;padding-top:80px}
.hero .tag{display:inline-block;background:rgba(31,182,255,.16);border:1px solid rgba(31,182,255,.5);color:#aee6ff;
  padding:6px 16px;border-radius:999px;font-size:13px;letter-spacing:2px;margin-bottom:22px}
.hero h1{font-size:clamp(34px,6vw,66px);line-height:1.12;font-weight:900;letter-spacing:1px;text-shadow:0 4px 30px rgba(0,0,0,.35)}
.hero h1 .hl{background:linear-gradient(120deg,#1fb6ff,#7c5cff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(16px,2vw,20px);margin:22px 0 36px;max-width:640px;color:#d6e6f7}
.hero .cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{position:relative;z-index:2;display:flex;gap:46px;margin-top:60px;flex-wrap:wrap}
.hero-stats .num{font-size:34px;font-weight:800;color:#fff}
.hero-stats .lbl{color:#bcd4ee;font-size:14px}
.hero-sub{min-height:42vh;background:
  radial-gradient(700px 400px at 85% 10%,rgba(124,92,255,.30),transparent 60%),
  linear-gradient(135deg,#0a1730,#102a52 65%,#0b3a66)}
.hero-sub .hero-bg,.hero-sub .hero-grid{display:none}

/* Cards grid */
.grid{display:grid;gap:26px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;border:1px solid var(--line);position:relative}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card .ic{height:150px;display:flex;align-items:center;justify-content:center;font-size:54px;
  background:linear-gradient(135deg,rgba(31,182,255,.12),rgba(124,92,255,.12));color:var(--accent)}
.card .body{padding:24px}
.card .body h3{color:var(--brand);font-size:21px;margin-bottom:10px}
.card .body p{color:var(--muted);font-size:14.5px;margin-bottom:12px}
.card .more{display:inline-block;color:var(--accent);font-weight:700;font-size:14px}
.card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.card .tags span{font-size:12.5px;color:var(--brand-2);background:#eef4ff;border-radius:999px;padding:4px 12px}

/* Metrics */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:10px}
.metric{background:linear-gradient(135deg,#0a1730,#102a52);color:#fff;border-radius:var(--radius);padding:34px 24px;text-align:center;box-shadow:var(--shadow-lg)}
.metric .v{font-size:48px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.metric .u{font-size:22px;font-weight:800;margin-left:4px;color:#aee6ff}
.metric .t{color:#bcd4ee;margin-top:12px;font-size:15px}

/* Features */
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.feature{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:var(--shadow);transition:.25s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfe0ff}
.feature .fi{width:54px;height:54px;flex:0 0 54px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;background:linear-gradient(135deg,rgba(31,255,.12),rgba(124,92,255,.14));color:var(--accent)}
.feature h3{color:var(--brand);font-size:19px;margin-bottom:6px}
.feature p{color:var(--muted);font-size:14.5px}

/* Tech layout */
.tech-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.tech-wrap img{border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%}
.tech-text h2{font-size:30px;color:var(--brand);margin-bottom:16px}
.tech-text p{color:#475569;margin-bottom:14px}
.tech-list{list-style:none;margin-top:16px}
.tech-list li{padding-left:26px;position:relative;margin-bottom:10px;color:#33415c}
.tech-list li::before{content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:50%;background:var(--grad)}
.accordion{border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-top:8px}
.acc-item{border-bottom:1px solid var(--line)}
.acc-item:last-child{border-bottom:none}
.acc-q{padding:18px 22px;font-weight:700;color:var(--brand);cursor:pointer;display:flex;justify-content:space-between;align-items:center;background:#fff;transition:.2s}
.acc-q:hover{color:var(--accent)}
.acc-q span{transition:.3s;color:var(--accent);font-size:22px}
.acc-item.open .acc-q span{transform:rotate(45deg)}
.acc-a{max-height:0;overflow:hidden;transition:max-height .35s ease;background:#f7faff}
.acc-item.open .acc-a{max-height:300px}
.acc-a p{padding:0 22px 18px;color:var(--muted);font-size:14.5px}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--brand),var(--brand-2));color:#fff;text-align:center;border-radius:var(--radius);padding:56px 24px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 300px at 80% 20%,rgba(31,182,255,.35),transparent 60%)}
.cta-band h2{font-size:30px;margin-bottom:14px;position:relative}
.cta-band p{color:#d6e6f7;margin-bottom:28px;position:relative}

/* Contact */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info .item{display:flex;gap:16px;margin-bottom:22px}
.contact-info .ico{width:48px;height:48px;flex:0 0 48px;border-radius:12px;background:linear-gradient(135deg,rgba(31,182,255,.16),rgba(124,92,255,.16));color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:22px}
.contact-info b{display:block;color:var(--brand)}
.contact-info span{color:var(--muted)}
.form-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.form-box h3{color:var(--brand);margin-bottom:18px;font-size:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--ink);margin-bottom:6px;font-weight:600}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;outline:none;transition:.2s;font-family:inherit}
.field input:focus,.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(31,182,255,.18)}
.field textarea{resize:vertical;min-height:110px}
.form-box button{width:100%;justify-content:center;display:flex}

/* News */
.news-list{display:grid;gap:20px}
.news-card{display:grid;grid-template-columns:170px 1fr;gap:0;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);transition:.3s}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.news-card .date{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px}
.news-card .date .d{font-size:30px;font-weight:900;line-height:1}
.news-card .date .y{font-size:13px;opacity:.85;margin-top:4px}
.news-card .body{padding:20px 24px}
.news-card .body h3{color:var(--brand);font-size:19px;margin-bottom:8px}
.news-card .body p{color:var(--muted);font-size:14.5px}
.news-card .body .more{color:var(--accent);font-weight:700;font-size:14px}

/* Cases */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case{position:relative;border-radius:var(--radius);overflow:hidden;min-height:240px;display:flex;align-items:flex-end;
  background:linear-gradient(135deg,#0a1730,#102a52);color:#fff;padding:28px;box-shadow:var(--shadow)}
.case::after{content:"";position:absolute;inset:0;background:radial-gradient(400px 300px at 80% 0%,rgba(31,182,255,.35),transparent 60%)}
.case .ci{font-size:42px;margin-bottom:10px;position:relative}
.case h3{font-size:22px;position:relative;margin-bottom:8px}
.case p{color:#cfe0f2;font-size:14.5px;position:relative;max-width:90%}

/* About */
.about-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.about-text h2{font-size:30px;color:var(--brand);margin-bottom:18px}
.about-text p{color:#475569;margin-bottom:14px}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}
.stats-row .s{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center;box-shadow:var(--shadow)}
.stats-row .s .v{font-size:30px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats-row .s .t{color:var(--muted);font-size:13px;margin-top:4px}
.values{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:26px}
.value{background:#eef4ff;border-radius:12px;padding:18px;text-align:center}
.value .ico{font-size:26px}
.value b{display:block;color:var(--brand);margin-top:8px;font-size:15px}
.value p{color:var(--muted);font-size:13px;margin-top:4px}

/* Footer */
.site-footer{background:linear-gradient(135deg,#0a1730,#102a52);color:#cdd9e6;padding:54px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.site-footer h4{color:#fff;margin-bottom:16px;font-size:17px}
.site-footer a{color:#bcd0e3;display:block;margin-bottom:10px;transition:.2s}
.site-footer a:hover{color:#1fb6ff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;text-align:center;font-size:13px;color:#9fb3c6;display:flex;flex-direction:column;align-items:center;gap:6px}
.footer-bottom div{white-space:nowrap}
.footer-bottom a{display:inline;margin-bottom:0;color:#bcd0e3;text-decoration:underline;text-underline-offset:2px}
.footer-bottom a:hover{color:#1fb6ff}

/* Responsive */
@media(max-width:980px){
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .grid.cols-3{grid-template-columns:1fr 1fr}
  .features,.case-grid,.about-wrap,.tech-wrap,.contact-wrap{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .values{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav-toggle{display:block}
  .nav-links{position:absolute;top:104px;right:4vw;left:4vw;flex-direction:column;background:#fff;padding:18px;border-radius:14px;
    box-shadow:var(--shadow-lg);display:none;margin-left:0}
  .nav-links.open{display:flex}
  .nav-links a{color:var(--ink)!important}
  .grid.cols-4,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .news-card{grid-template-columns:1fr}
  .news-card .date{flex-direction:row;gap:10px;padding:14px}
}
@media(max-width:680px){
  .hero{padding:30px 0}
  .hero .container{padding-top:72px}
  .hero-stats{gap:26px;margin-top:40px}
  .hero-sub{min-height:34vh}
  .section{padding:56px 0}
  .section-head{margin-bottom:34px}
  .section-head h2{font-size:26px}
  .grid{gap:18px}
  .footer-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .pd{padding:20px}
  .spec-table{font-size:12.5px}
  .spec-table th,.spec-table td{padding:6px 8px}
}
@media(max-width:480px){
  .hero h1{font-size:32px}
  .hero p.sub{font-size:15px}
  .hero-stats .num{font-size:28px}
  .card .body{padding:18px}
  .card .body h3{font-size:18px}
  .footer-bottom div{white-space:normal}
}

/* Product detail */
.card .ic img{height:120px;width:auto;object-fit:contain}
.pd{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px;margin-bottom:36px}
.pd .pd-img{display:flex;align-items:center;justify-content:center}
.pd .pd-img img{width:100%;max-width:100%;object-fit:contain}
.pd h3{color:var(--brand);font-size:24px;margin-bottom:4px}
.pd .pd-tag{display:inline-block;font-size:13px;color:#fff;background:var(--grad);padding:4px 14px;border-radius:999px;margin:8px 0 14px}
.pd p{color:#475569;margin-bottom:12px;font-size:15px}
.pd .kv{display:grid;grid-template-columns:1fr 1fr;gap:10px 20px;margin:16px 0}
.pd .kv div{font-size:14px;color:var(--ink);border-left:3px solid var(--accent);padding-left:10px}
.pd .kv b{color:var(--brand)}
.pd .note{color:var(--muted);font-size:13.5px;margin-top:10px}
.spec-table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.spec-table th{background:#eef4ff;color:var(--brand);font-weight:700}
.spec-table td{color:#475569}
.pd-sub{font-weight:700;color:var(--brand);margin:18px 0 6px;font-size:17px}
@media(max-width:860px){.pd{grid-template-columns:1fr}.pd .kv{grid-template-columns:1fr}}

/* Product grid (原站方形大图风格) */
.prod-card{overflow:hidden;padding:0;transition:transform .25s,box-shadow .25s}
.prod-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.prod-card .ic{aspect-ratio:1/1;height:auto;min-height:0;padding:0;border-radius:0;background:#f5f7fb;overflow:hidden}
.prod-card .ic img{width:100%;height:100%;object-fit:cover;display:block}
.prod-card .body{padding:14px 16px;text-align:center}
.prod-card .body h3{font-size:17px;margin:0}
@media(max-width:680px){.prod-card .body h3{font-size:16px}}

/* Category tabs */
.tabs{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:36px}
.tab{appearance:none;-webkit-appearance:none;border:1px solid var(--line);background:#fff;color:var(--ink);padding:10px 24px;border-radius:999px;font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;transition:all .25s}
.tab:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.tab.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(31,182,255,.28)}
@media(max-width:680px){.tab{padding:8px 16px;font-size:13.5px}}

/* Scenes & marquee */
.scene-grid{display:grid;gap:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.scene-row{display:grid;grid-template-columns:1fr 1fr}
.scene-txt{background:linear-gradient(135deg,#1668b8,#0d4f96);color:#fff;padding:44px 40px;display:flex;flex-direction:column;justify-content:center}
.scene-txt h3{font-size:24px;margin-bottom:12px}
.scene-txt p{color:#d8eaff;font-size:15px;line-height:1.8}
.scene-img img{width:100%;height:100%;object-fit:cover;display:block;aspect-ratio:16/10}
@media(max-width:860px){.scene-row.rev .scene-img{order:-1}.scene-row{grid-template-columns:1fr}.scene-txt{padding:26px 22px}}
.marquee{overflow:hidden;border-radius:var(--radius)}
.mq-track{display:flex;width:max-content;animation:mq 45s linear infinite}
.marquee:hover .mq-track{animation-play-state:paused}
.mq-track img{height:250px;width:auto;margin-right:14px;border-radius:10px;object-fit:cover}
@keyframes mq{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(max-width:680px){.mq-track img{height:170px}}

/* Hero visual */
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero-visual{display:flex;align-items:center;justify-content:center}
.hero-visual img{width:100%;max-width:400px;height:auto;object-fit:contain;filter:drop-shadow(0 0 26px rgba(120,180,255,.35)) drop-shadow(0 22px 50px rgba(0,0,0,.5))}
@media(max-width:900px){.hero-inner{grid-template-columns:1fr;gap:24px}.hero-visual{max-width:320px;margin:0 auto}}

/* Hero（整图轮播） */
.hero{position:relative;padding:104px 0 0;display:block;min-height:0;color:#fff;overflow:hidden}
.hero-slider{width:100%}
.hero-slider .slide{display:none}
.hero-slider .slide.active{display:block;animation:hf .6s ease}
.hero-slider .slide img{width:100%;display:block;box-shadow:0 18px 50px rgba(0,0,0,.35)}
@keyframes hf{from{opacity:0;transform:translateX(28px)}to{opacity:1;transform:none}}
.hero-dots{display:flex;gap:10px;justify-content:center;margin-top:26px}
.hero-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.28);cursor:pointer;transition:.3s}
.hero-dots span.on{background:#fff;transform:scale(1.25)}
@media(max-width:680px){
  .hero{padding-top:88px}
  .hero-slider .slide a{display:block;height:60vw;overflow:hidden}
  .hero-slider .slide img{height:100%;object-fit:cover;object-position:22% center}
  .nav-links{top:92px}
}