*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
/* ===== A+B 混合配色：品牌深海军蓝 #02285a（取自 LOGO）+ 青色科技高亮 #22d3ee ===== */
:root{
  --primary:#02285a;--primary-2:#0d3d7a;--primary-light:#1a5aa8;
  --accent:#22d3ee;--accent-2:#3ec6f0;--accent-deep:#0891b2;--silver:#c9d4e2;--dark:#01152f;
  --text:#334155;--text-light:#64748b;--bg:#fff;--bg-alt:#f5f8fc;--border:#e2e8f0;
  --gradient:linear-gradient(135deg,#02285a,#0d3d7a 55%,#0891b2);
  --hero-bg:radial-gradient(circle at 78% 28%,#0d3d7a 0%,#02285a 45%,#01152f 100%);
  --shadow:0 12px 40px rgba(2,40,90,.10);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--text);line-height:1.75;background:var(--bg);font-size:16px}
a{color:var(--accent-deep);text-decoration:none}img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}.section-alt{background:var(--bg-alt)}
.section-title{font-size:34px;font-weight:800;color:var(--primary);margin-bottom:12px;letter-spacing:-.5px}
.section-title .cn{display:block;font-size:26px;font-weight:700;color:var(--primary-2);letter-spacing:0}
.section-sub{font-size:16px;color:var(--text-light);margin-bottom:48px;max-width:720px}
.btn{display:inline-block;padding:14px 32px;font-size:15px;font-weight:600;border-radius:6px;transition:all .2s;border:0;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-2px);box-shadow:0 10px 26px rgba(2,40,90,.28)}
.btn-accent{background:var(--accent);color:var(--primary)}
.btn-accent:hover{background:var(--accent-2);transform:translateY(-2px)}
.btn-outline{border:2px solid rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.12);transform:translateY(-2px)}
.topbar{background:var(--dark);color:rgba(255,255,255,.72);font-size:12.5px;letter-spacing:.3px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:rgba(255,255,255,.72)}.topbar a:hover{color:var(--accent)}
.header{position:sticky;top:0;left:0;right:0;z-index:100;background:#fff;border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{font-size:21px;font-weight:800;color:var(--primary);letter-spacing:-.5px;display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.logo-img{height:42px;width:auto;display:block;flex:none}
.logo span{color:var(--accent-deep)}
.logo-tag{display:block;font-size:10.5px;font-weight:500;color:var(--text-light);letter-spacing:.4px;text-transform:uppercase;line-height:1.3}
.nav{display:flex;gap:19px;align-items:center;white-space:nowrap}
.nav a{font-size:13px;font-weight:600;color:var(--text);transition:color .2s;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a.active{color:var(--primary);border-bottom-color:var(--accent-deep)}
.lang-switch{font-size:13px;font-weight:700;color:var(--primary);border:1.5px solid var(--primary);padding:5px 12px;border-radius:4px;white-space:nowrap}
.lang-switch:hover{background:var(--primary);color:#fff}
.nav-toggle{display:none;font-size:24px;background:none;border:none;cursor:pointer;color:var(--primary)}

/* ============ HERO — 方案 A 深蓝科技风 ============ */
.hero{background:var(--hero-bg);color:#fff;padding:104px 0 0;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(34,211,238,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.07) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse at 65% 35%,rgba(0,0,0,.9) 0%,transparent 72%)}
.hero::after{content:'';position:absolute;width:420px;height:420px;right:-120px;top:40px;border-radius:50%;border:1.5px solid rgba(34,211,238,.30);box-shadow:0 0 0 60px rgba(34,211,238,.05),0 0 0 140px rgba(34,211,238,.035);pointer-events:none}
.hero .container{position:relative;z-index:2;padding-bottom:88px}
.hero-body{display:grid;grid-template-columns:1.55fr 1fr;gap:56px;align-items:center}
.hero-badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:var(--accent);border:1px solid rgba(34,211,238,.42);border-radius:20px;padding:6px 16px;margin-bottom:22px}
.hero-body h1{font-size:50px;font-weight:800;line-height:1.16;letter-spacing:-1.4px;color:#fff;margin-bottom:20px}
.hero-body h1 em{font-style:normal;color:var(--accent)}
.hero-body p{font-size:16.5px;color:#b8cbe2;line-height:1.9;margin-bottom:32px;max-width:640px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn-hero{background:var(--accent);color:var(--primary)}
.btn-hero:hover{background:#5ee1f5;transform:translateY(-2px);box-shadow:0 12px 30px rgba(34,211,238,.32)}
.btn-hero-ghost{border:1.5px solid #3d5f8a;color:#dbe7f5;background:transparent}
.btn-hero-ghost:hover{border-color:var(--accent);color:#fff;transform:translateY(-2px)}
.hero-kpis{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.16);border-radius:12px;overflow:hidden}
.hero-kpis div{background:rgba(255,255,255,.045);padding:24px 20px}
.hero-kpis strong{display:block;font-size:28px;font-weight:800;color:#fff;line-height:1.2}
.hero-kpis strong small{color:var(--accent)}
.hero-kpis span{font-size:12.5px;color:rgba(255,255,255,.62);letter-spacing:.3px}

/* ============ 产品速览条（B 工业白）============ */
.hero-strip{background:#fff;padding:0;margin-top:-52px;position:relative;z-index:3}
.hero-collage{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;background:#fff;border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.hero-collage figure{overflow:hidden;border-radius:9px;background:var(--bg-alt);margin:0;height:168px}
.hero-collage img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.hero-collage figure:hover img{transform:scale(1.05)}

/* 内页页头 — 同样深蓝科技 */
.page-hero{padding:132px 0 74px;background:var(--hero-bg);color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(34,211,238,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.07) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse at 65% 35%,rgba(0,0,0,.85) 0%,transparent 75%)}
.page-hero::after{content:'';position:absolute;width:340px;height:340px;right:-90px;top:20px;border-radius:50%;border:1.5px solid rgba(34,211,238,.28);box-shadow:0 0 0 50px rgba(34,211,238,.05),0 0 0 110px rgba(34,211,238,.03)}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{font-size:42px;font-weight:800;margin-bottom:14px;letter-spacing:-1px}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.page-hero p{font-size:17px;color:#b8cbe2;max-width:760px}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:14px}
.breadcrumb a{color:rgba(255,255,255,.9)}
.breadcrumb a:hover{color:var(--accent)}

/* ============ 正文卡片（B 工业专业白）============ */
.cat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(248px,1fr));gap:24px}
.cat-card{display:block;position:relative;background:var(--bg);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:all .3s;color:inherit}
.cat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--accent)}
.cat-card img{width:100%;height:210px;object-fit:cover;display:block;background:var(--bg-alt)}
.cat-card .cc-body{padding:26px}
.cat-card h3{font-size:20px;font-weight:800;color:var(--primary);margin-bottom:8px}
.cat-card p{font-size:14px;color:var(--text-light);line-height:1.75}
.cat-card .cc-more{margin-top:16px;font-size:14px;font-weight:700;color:var(--accent-deep)}
.cat-card .cc-tag{position:absolute;top:14px;left:14px;background:rgba(2,40,90,.92);color:#fff;font-size:11px;font-weight:700;letter-spacing:.6px;padding:4px 10px;border-radius:4px;text-transform:uppercase}
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:30px}
.product-card{background:var(--bg);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--accent)}
.product-card .card-img{height:230px;background:var(--bg-alt);overflow:hidden;display:flex;align-items:center;justify-content:center}
.product-card .card-img img{width:100%;height:100%;object-fit:cover}
.product-card .card-img picture{display:block;width:100%;height:100%}
.product-card .card-img picture img{width:100%;height:100%;object-fit:cover}
.prose figure img{max-height:480px;object-fit:cover}
.product-card .card-body{padding:28px;display:flex;flex-direction:column;flex:1}
.product-card .card-tag{display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--accent-deep);margin-bottom:8px}
.product-card h3{font-size:20px;font-weight:800;color:var(--primary);margin-bottom:8px}
.product-card p{font-size:14px;color:var(--text-light);line-height:1.75}
.product-card ul{margin:14px 0 0;padding:0;list-style:none}
.product-card ul li{font-size:13px;color:var(--text-light);padding:7px 0;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;gap:10px}
.product-card ul li:last-child{border-bottom:none}
.card-link{margin-top:auto;padding-top:18px;font-size:14px;font-weight:700}
.collage{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.collage figure{margin:0;border-radius:10px;overflow:hidden;background:var(--bg-alt)}
.collage figure img{width:100%;height:230px;object-fit:cover;display:block;transition:transform .4s}
.collage figure:hover img{transform:scale(1.05)}
.masonry{columns:3;column-gap:16px}
.masonry figure{margin:0 0 16px;border-radius:10px;overflow:hidden;background:var(--bg-alt);break-inside:avoid}
.masonry img{width:100%;display:block}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.gallery-item{position:relative;border-radius:10px;overflow:hidden;cursor:pointer;background:var(--bg-alt);aspect-ratio:16/9}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.gallery-item:hover img{transform:scale(1.05)}
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;margin-top:48px}
.video-item{background:var(--bg);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.video-item video{width:100%;display:block;background:#000}
.video-item .video-cap{padding:12px 16px;font-size:13px;color:var(--text-light)}
.lightbox{position:fixed;inset:0;z-index:999;background:rgba(1,21,47,.94);display:none;align-items:center;justify-content:center;padding:40px}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:88vh;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox .lb-close{position:absolute;top:20px;right:28px;font-size:36px;color:#fff;cursor:pointer;line-height:1}

/* ============ 数据 / CTA — 深蓝 ============ */
.stats{background:var(--dark);color:#fff;padding:80px 0}
.stats-head{display:grid;grid-template-columns:1fr 1.4fr;gap:48px;align-items:start;margin-bottom:48px}
.stats h2{font-size:32px;font-weight:800;letter-spacing:-.5px}
.stats p{color:rgba(255,255,255,.7);font-size:15.5px;line-height:1.85}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);border-radius:14px;overflow:hidden}
.stats-grid div{background:var(--dark);padding:34px 28px}
.stats-grid strong{display:block;font-size:38px;font-weight:800;color:#fff;line-height:1.1;letter-spacing:-1px}
.stats-grid strong i{font-style:normal;color:var(--accent)}
.stats-grid span{display:block;margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.68)}
.cta-box{background:var(--hero-bg);border-radius:16px;overflow:hidden;display:grid;grid-template-columns:1.2fr 1fr;color:#fff;position:relative}
.cta-box::after{content:'';position:absolute;width:280px;height:280px;right:-70px;bottom:-90px;border-radius:50%;border:1.5px solid rgba(34,211,238,.26)}
.cta-box .cta-text{padding:64px 56px;display:flex;flex-direction:column;justify-content:center;position:relative;z-index:1}
.cta-box h2{font-size:34px;font-weight:800;line-height:1.22;margin-bottom:14px;letter-spacing:-.6px}
.cta-box p{color:rgba(255,255,255,.74);font-size:16px;margin-bottom:30px;max-width:520px}
.cta-box .cta-img{background:var(--primary);min-height:300px;position:relative;z-index:1}
.cta-box .cta-img img{width:100%;height:100%;object-fit:cover;display:block;opacity:.9}
.partners{padding:56px 0;background:var(--bg-alt);text-align:center}
.partners h2{font-size:26px;font-weight:800;color:var(--primary);margin-bottom:10px}
.partners p{font-size:14.5px;color:var(--text-light);margin-bottom:32px}
.partner-row{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:48px;opacity:.7}
.partner-row span{font-size:17px;font-weight:700;color:var(--primary);letter-spacing:.4px}
.cat-section{padding:80px 0}
.cat-header{display:flex;align-items:center;gap:16px;margin-bottom:32px}
.cat-icon{width:56px;height:56px;border-radius:12px;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-size:26px;color:#fff;flex-shrink:0}
.cat-header h2{font-size:28px;font-weight:800;color:var(--primary)}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:32px}
.detail-block{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:26px}
.detail-block h4{font-size:14px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.detail-block ul{list-style:none}
.detail-block li{padding:8px 0;font-size:14px;color:var(--text-light);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;gap:12px}
.detail-block li:last-child{border-bottom:none}
.detail-block li span:first-child{font-weight:600;color:var(--primary)}
.detail-block li span:last-child{text-align:right}
.spec-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
.spec-table th{text-align:left;padding:13px 16px;background:var(--primary);color:#fff;font-weight:700}
.spec-table td{padding:11px 16px;border-bottom:1px solid var(--border)}
.spec-table tr:nth-child(even) td{background:var(--bg-alt)}
.spec-table td:first-child{font-weight:600;color:var(--primary);white-space:nowrap}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}
.feature-card{padding:34px 30px;background:var(--bg);border:1px solid var(--border);border-radius:12px;text-align:center;transition:all .3s}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--accent)}
.feature-card .icon{font-size:34px;margin-bottom:16px}
.feature-card h4{font-size:16.5px;font-weight:800;color:var(--primary);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-light);line-height:1.75}
.photo-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:28px}
.photo-card{margin:0;border-radius:12px;overflow:hidden;background:#fff;border:1px solid var(--border);transition:all .3s}
.photo-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.photo-card img{width:100%;height:220px;object-fit:cover;display:block}
.photo-card figcaption{padding:22px 24px}
.photo-card h4{font-size:17px;font-weight:800;color:var(--primary);margin-bottom:8px}
.photo-card p{font-size:14px;color:var(--text-light);line-height:1.75}
.contact-info{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px}
.contact-item{padding:26px;background:var(--bg);border:1px solid var(--border);border-radius:10px}
.contact-item h4{font-size:14px;color:var(--primary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}
.contact-item p{font-size:15px;color:var(--text-light)}
.prose{max-width:880px}
.prose h3{font-size:22px;font-weight:800;color:var(--primary);margin:32px 0 12px}
.prose p{font-size:16px;color:var(--text);line-height:1.9;margin-bottom:14px}
.prose ul,.prose ol{margin:0 0 16px 22px}
.prose li{font-size:16px;line-height:1.9;color:var(--text)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start;margin-bottom:32px}
.footer{background:#eef2f7;color:var(--text);padding:56px 0 0;font-size:14px;border-top:1px solid var(--border)}
.footer-inner{display:grid;grid-template-columns:1.8fr 1fr 1fr 1.2fr;gap:40px}
.footer h4{color:var(--primary);font-size:14px;font-weight:800;text-transform:uppercase;letter-spacing:.6px;margin-bottom:16px}
.footer p{line-height:1.85;color:var(--text-light)}
.footer ul{list-style:none}.footer li{margin-bottom:9px}
.footer a{color:var(--text-light)}.footer a:hover{color:var(--primary)}
.footer .f-cta{margin-top:18px}
.footer .socials{display:flex;gap:10px;margin-top:14px}
.footer .socials a{width:32px;height:32px;border-radius:50%;background:#fff;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:var(--primary)}
.footer .socials a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.footer-bottom{border-top:1px solid var(--border);margin-top:44px;padding:22px 0;text-align:center;font-size:13px;line-height:1.9;color:var(--text-light)}
.legal{font-size:12px;color:#94a3b8}
@media(max-width:1000px){
  .hero-collage{grid-template-columns:repeat(3,1fr)}
  .hero-collage figure:nth-child(4),.hero-collage figure:nth-child(5){display:none}
  .hero-body,.stats-head{grid-template-columns:1fr;gap:32px}
  .hero-body h1{font-size:38px}
  .cta-box{grid-template-columns:1fr}
  .detail-grid,.two-col{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .masonry{columns:2}
}
@media(max-width:768px){
  .hero{padding:72px 0 0}
  .hero-strip{margin-top:-30px}
  .hero-collage{grid-template-columns:1fr 1fr;padding:10px}
  .hero-collage figure{height:130px}
  .hero-collage figure:nth-child(3){display:none}
  .hero-body h1{font-size:30px}.page-hero h1{font-size:28px}
  .section{padding:56px 0}
  .nav{display:none;position:absolute;top:114px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--border);padding:8px 0;box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:12px 24px;width:100%;border-bottom:none}
  .nav-toggle{display:block}
  .footer-inner{grid-template-columns:1fr}
  .collage,.photo-cards{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .masonry{columns:1}
}

/* 栏目下拉 */
.nav-item{position:relative}
.nav-item>a{font-size:13px;font-weight:600;color:var(--text);padding:4px 0;border-bottom:2px solid transparent;display:inline-block;transition:color .2s}
.nav-item>a:hover,.nav-item>a.active{color:var(--primary);border-bottom-color:var(--accent-deep)}
.dropdown{display:none;position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);padding:8px 0;min-width:176px;z-index:60}
.nav-item:hover .dropdown{display:block}
.dropdown a{display:block;padding:9px 18px;font-size:13px;font-weight:500;color:var(--text);white-space:nowrap;border:none}
.dropdown a:hover,.dropdown a.active{background:#f5f7fa;color:var(--primary)}
@media(max-width:1000px){
.nav-item{width:100%}
.nav-item>a{display:block;width:100%;padding:12px 24px}
.dropdown{position:static;transform:none;display:block;border:none;box-shadow:none;padding:0 0 4px 36px;min-width:0;background:transparent}
.dropdown a{padding:8px 0}
}