:root{
  --navy:#082A5A;
  --deep:#061A38;
  --blue:#0B66C3;
  --blue2:#0E8AEF;
  --cyan:#67E8F9;
  --text:#162033;
  --muted:#64748B;
  --light:#F5F8FC;
  --line:#DDE8F5;
  --white:#FFFFFF;
  --shadow:0 18px 48px rgba(14,42,84,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);background:#fff;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.container{width:min(1200px,calc(100% - 32px));margin:0 auto}
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav{height:82px;display:flex;align-items:center;justify-content:space-between;gap:42px}
.brand{display:flex;align-items:center;gap:14px}
.brand-logo{width:58px;height:58px;border-radius:16px;border:1px solid var(--line);background:#fff;object-fit:contain}
.brand strong{display:block;color:var(--navy);font-size:26px;letter-spacing:.12em;line-height:1}
.brand span{display:block;margin-top:6px;color:var(--muted);font-size:12px;letter-spacing:.12em;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:10px;color:#334155;font-size:14px;font-weight:800}
.nav-links a{padding:0;border-radius:0;background:transparent!important;box-shadow:none!important;transition:.2s;letter-spacing:.01em;white-space:nowrap}
.nav-links a:hover{color:var(--blue)}
.nav-cta{padding:11px 18px;border-radius:999px;background:var(--navy);color:#fff!important}
.menu-btn{display:none;border:0;background:none;font-size:30px;color:var(--navy);cursor:pointer}

.detail-hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#061A38,#0B5CB8);color:#fff}
.detail-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,22,46,.78),rgba(6,22,46,.28) 62%,rgba(6,22,46,.08));opacity:.48}
.detail-hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 470px;gap:46px;align-items:center;padding:82px 0 76px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px;color:#D8E8FF;font-size:14px;font-weight:900;line-height:1.45}
.breadcrumb a{color:#D8E8FF;transition:.2s}
.breadcrumb a:hover{color:#fff}
.breadcrumb-separator{color:rgba(255,255,255,.45)}
.breadcrumb-current{color:#8BE7FF}
.back-link{display:inline-flex;align-items:center;gap:9px;margin-bottom:20px;color:#D8E8FF;font-size:14px;font-weight:900}
.back-link span{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24)}
.detail-kicker{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;color:#8BE7FF;font-size:13px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.detail-kicker:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--cyan);box-shadow:0 0 18px var(--cyan)}
.detail-copy h1{margin:0 0 18px;font-size:clamp(40px,5vw,64px);line-height:1.04;letter-spacing:-.045em}
.detail-copy p{margin:0;max-width:760px;color:#D8E8FF;font-size:18px;line-height:1.82}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:13px 20px;border-radius:999px;font-size:14px;font-weight:900;transition:.2s}
.btn-primary{background:#fff;color:var(--navy)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.16)}
.btn-ghost{border:1px solid rgba(255,255,255,.32);color:#fff;background:rgba(255,255,255,.08)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.detail-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px}
.metric{padding:16px;border:1px solid rgba(255,255,255,.16);border-radius:18px;background:rgba(255,255,255,.09);backdrop-filter:blur(10px)}
.metric small{display:block;color:#B9D7FF;font-size:12px;line-height:1.4}
.metric b{display:block;margin-top:8px;color:#fff;font-size:17px;line-height:1.35}
.hero-product-card{border-radius:30px;background:rgba(255,255,255,.94);box-shadow:0 24px 64px rgba(0,0,0,.24);overflow:hidden;border:1px solid rgba(255,255,255,.55)}
.hero-product-card picture,.hero-product-card img{width:100%}
.hero-product-card > picture img{height:390px;object-fit:contain;background:#fff;padding:22px}
.product-carousel-card{position:relative}
.product-carousel{position:relative;width:100%;height:390px;background:#fff;overflow:hidden}
.carousel-slide{position:absolute;inset:0;opacity:0;z-index:0;display:flex;align-items:center;justify-content:center;background:#fff;pointer-events:none;transition:opacity .45s ease}
.carousel-slide.active{opacity:1;z-index:1;pointer-events:auto}
.carousel-slide img{width:100%;height:100%;object-fit:contain;background:#fff;padding:22px}
.carousel-arrow{position:absolute;top:50%;z-index:3;transform:translateY(-50%);width:38px;height:38px;border:0;border-radius:999px;background:rgba(8,42,90,.78);color:#fff;font-size:28px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(0,0,0,.18);transition:.2s}
.carousel-prev{left:14px}
.carousel-next{right:14px}
.carousel-arrow:hover,.carousel-arrow:focus-visible{background:#0B66C3;outline:none}
.carousel-dots{position:absolute;left:0;right:0;bottom:14px;z-index:4;display:flex;justify-content:center;gap:8px}
.carousel-dot{width:9px;height:9px;border:0;border-radius:50%;background:rgba(8,42,90,.26);cursor:pointer;padding:0;transition:.2s}
.carousel-dot.active{width:24px;border-radius:999px;background:#0B66C3}
.carousel-dot:focus-visible{outline:3px solid rgba(11,102,195,.24);outline-offset:3px}
.hero-card-caption{padding:22px 24px;background:#F5F8FC;border-top:1px solid var(--line)}
.hero-card-caption strong{display:block;color:var(--navy);font-size:19px}
.hero-card-caption span{display:block;margin-top:8px;color:var(--muted);font-size:14px;line-height:1.6}

.detail-section{padding:76px 0}
.detail-section.alt{background:var(--light)}
.section-head{max-width:820px;margin-bottom:30px}
.section-label{display:inline-block;color:var(--blue);font-size:13px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.section-head h1{margin:12px 0 12px;color:#111827;font-size:clamp(30px,4vw,44px);line-height:1.15;letter-spacing:-.03em}
.section-head h2{margin:12px 0 12px;color:#111827;font-size:clamp(30px,4vw,44px);line-height:1.15;letter-spacing:-.03em}
.section-head p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.detail-card{padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(14,42,84,.07)}
.detail-card small{display:block;color:#7C8BA0;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.06em}
.detail-card b{display:block;margin-top:10px;color:var(--navy);font-size:19px;line-height:1.35}
.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.faq-card{padding:22px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(14,42,84,.07)}
.faq-card h3{margin:0 0 12px;color:var(--navy);font-size:18px;line-height:1.35}
.faq-card p{margin:0;color:var(--muted);font-size:15px;line-height:1.78}
.related-products{margin-top:42px}
.related-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:18px}
.related-heading h2{margin:10px 0 0;color:#111827;font-size:30px;line-height:1.18}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related-link{display:flex;min-height:178px;flex-direction:column;gap:9px;padding:22px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(14,42,84,.07);transition:.2s}
.related-link:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(14,42,84,.12);border-color:#BBD7F4}
.related-link small{color:var(--blue);font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.related-link strong{color:var(--navy);font-size:19px;line-height:1.3}
.related-link span{color:var(--muted);font-size:14px;line-height:1.65}
.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.copy-panel{padding:32px;border-radius:28px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(14,42,84,.07)}
.copy-panel h2{margin:0 0 14px;color:#111827;font-size:34px;line-height:1.15;letter-spacing:-.03em}
.copy-panel p{margin:0 0 22px;color:var(--muted);line-height:1.85}
.feature-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.feature-list li{position:relative;padding:14px 16px 14px 42px;border-radius:16px;background:#F5F8FC;border:1px solid #E7EEF7;color:#25324A;font-weight:800;line-height:1.55}
.feature-list li:before{content:"";position:absolute;left:17px;top:21px;width:11px;height:6px;border-left:3px solid var(--blue);border-bottom:3px solid var(--blue);transform:rotate(-45deg)}
.media-card{border-radius:28px;overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.media-card img{width:100%;height:430px;object-fit:cover}
.media-caption{padding:18px 20px;color:var(--muted);line-height:1.65;background:#fff}
.video-card{display:grid;grid-template-columns:1.2fr .8fr;gap:0;border-radius:30px;overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.video-wrap{background:#06162E}
.video-wrap video{display:block;width:100%;height:460px;object-fit:contain;background:#06162E}
.video-copy{padding:34px;background:#fff;display:flex;flex-direction:column;justify-content:center}
.video-copy h2{margin:0 0 14px;color:#111827;font-size:34px;line-height:1.15;letter-spacing:-.03em}
.video-copy p{margin:0 0 20px;color:var(--muted);line-height:1.82}
.video-points{display:grid;gap:10px}
.video-points span{padding:12px 14px;border-radius:14px;background:#EAF5FF;color:#0B3A75;font-weight:900}
.cta-band{padding:70px 0;background:linear-gradient(135deg,#062B5F,#0B66C3);color:#fff}
.cta-inner{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center}
.cta-inner h2{margin:0 0 10px;font-size:36px;line-height:1.15;letter-spacing:-.03em}
.cta-inner p{margin:0;color:#D8E8FF;line-height:1.8}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.footer{background:#06162E;color:rgba(255,255,255,.68);padding:46px 0}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr 1fr;gap:34px}
.footer h3{margin:0 0 14px;color:#fff}
.footer p{margin:0;line-height:1.78}
.footer-links{margin:0;padding:0;list-style:none;display:grid;gap:10px}
.footer a{color:rgba(255,255,255,.82)}
.footer a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand img{width:54px;height:54px;border-radius:15px;background:#fff;object-fit:contain}
.footer-brand strong{display:block;color:#fff;font-size:20px}
.footer-brand span{display:block;margin-top:4px;color:rgba(255,255,255,.58);font-size:12px;text-transform:uppercase;letter-spacing:.1em}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;margin-top:32px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:13px}

@media(max-width:1180px){.nav-links{gap:22px;font-size:13px}.brand span{letter-spacing:.08em}}
@media(max-width:1050px){
  .nav-links{display:none}
  .menu-btn{display:block}
  .nav-links.open{position:absolute;top:82px;left:16px;right:16px;display:flex;flex-direction:column;align-items:flex-start;padding:22px;border-radius:22px;background:#fff;box-shadow:var(--shadow)}
  .detail-hero-grid{grid-template-columns:1fr;padding:64px 0}
  .hero-product-card{max-width:560px}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .faq-grid,.related-grid{grid-template-columns:repeat(2,1fr)}
  .split-grid,.video-card,.cta-inner,.footer-grid{grid-template-columns:1fr}
  .cta-actions{justify-content:flex-start}
}
@media(max-width:640px){
  .container{width:min(100% - 28px,1200px)}
  .nav{height:72px}
  .brand-logo{width:48px;height:48px}
  .brand strong{font-size:22px}
  .brand span{font-size:10px}
  .nav-links.open{top:72px}
  .detail-hero-grid{gap:28px;padding:48px 0 52px}
  .detail-copy h1{font-size:38px}
  .detail-copy p{font-size:16px}
  .detail-metrics,.spec-grid,.faq-grid,.related-grid{grid-template-columns:1fr}
  .related-heading{display:block}
  .related-heading h2{font-size:26px}
  .hero-actions,.cta-actions{flex-direction:column}
  .btn{width:100%}
  .hero-product-card > picture img{height:300px;padding:18px}
  .product-carousel{height:300px}
  .carousel-slide img{padding:18px}
  .detail-section{padding:58px 0}
  .copy-panel{padding:24px}
  .copy-panel h2,.video-copy h2,.cta-inner h2{font-size:28px}
  .media-card img{height:300px}
  .video-wrap video{height:300px}
  .video-copy{padding:24px}
  .footer-bottom{flex-direction:column}
}