/* =========================================================
   宸安智感 · 顶级深色科技设计系统
   ========================================================= */
:root{
  --bg:#070b16;
  --bg-2:#0b1120;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.06);
  --border:rgba(120,160,255,.14);
  --border-strong:rgba(120,180,255,.32);
  --text:#e9eefb;
  --muted:#9fb0d0;
  --dim:#6b7c9e;
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --indigo:#6366f1;
  --accent:#38bdf8;
  --amber:#f59e0b;
  --rose:#fb7185;
  --grad:linear-gradient(120deg,#22d3ee 0%,#3b82f6 45%,#6366f1 100%);
  --grad-soft:linear-gradient(120deg,rgba(34,211,238,.18),rgba(99,102,241,.18));
  --glow:0 0 0 1px rgba(56,189,248,.25),0 18px 50px -18px rgba(34,120,255,.55);
  --radius:18px;
  --maxw:1200px;
  --font:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  /* --- 科技感增强令牌 --- */
  --cyan-2:#67e8f9;
  --violet:#8b5cf6;
  --line:rgba(120,180,255,.09);
  --hud-c:rgba(56,189,248,.5);
  --noise:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
/* 背景层：极光 + 网格 */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1100px 700px at 82% -10%,rgba(56,120,255,.26),transparent 62%),
    radial-gradient(900px 620px at 2% 6%,rgba(34,211,238,.18),transparent 60%),
    radial-gradient(900px 700px at 50% 112%,rgba(139,92,246,.18),transparent 62%),
    radial-gradient(620px 620px at 98% 60%,rgba(34,211,238,.10),transparent 66%),
    var(--bg);
}
/* 网格：46px 细格 + 230px 主格，双层叠加出「工程图纸」质感 */
body::after{
  content:"";position:fixed;inset:0;z-index:-1;opacity:.62;
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px),
    linear-gradient(rgba(120,180,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,255,.05) 1px,transparent 1px);
  background-size:46px 46px,46px 46px,230px 230px,230px 230px;
  -webkit-mask-image:radial-gradient(circle at 50% 26%,#000 0%,transparent 80%);
          mask-image:radial-gradient(circle at 50% 26%,#000 0%,transparent 80%);
}
/* 颗粒噪点：消除大面积渐变的「塑料感」，增强质感 */
.grain{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:var(--noise);background-size:160px 160px;opacity:.05;
}
/* 顶部滚动进度条 */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:99;pointer-events:none;
  background:rgba(120,180,255,.08);
}
.scroll-progress i{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--blue) 50%,var(--violet));
  box-shadow:0 0 12px rgba(34,211,238,.75);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}

/* ===================== 导航 ===================== */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(7,11,22,.58);
  border-bottom:1px solid var(--border);
  transition:background .35s ease,box-shadow .35s ease;
}
/* 底部流光边线：滚动后点亮，强化「面板已激活」的观感 */
.nav::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.8) 22%,rgba(99,102,241,.6) 62%,transparent);
  opacity:.5;transition:opacity .35s ease;
}
.nav.scrolled{background:rgba(6,10,20,.84);box-shadow:0 18px 44px -30px rgba(0,0,0,.98)}
.nav.scrolled::after{opacity:1}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.5px}
.brand .logo{width:42px;height:38px;flex:0 0 auto;filter:drop-shadow(0 0 10px rgba(59,121,220,.40))}
.brand .bn{font-size:18px}
.brand .bn small{display:block;font-size:11px;font-weight:500;color:var(--dim);letter-spacing:2px}
.menu{display:flex;align-items:center;gap:6px}
.menu a{padding:9px 14px;border-radius:10px;color:var(--muted);font-size:14.5px;font-weight:500;transition:.2s;position:relative}
.menu a:hover{color:var(--text);background:var(--surface)}
.menu a.active{color:var(--text);background:var(--surface-2)}
/* 导航项光条：hover / 激活时从左向右展开 */
.menu a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:1px;border-radius:1px;
  background:var(--grad);transform:scaleX(0);transform-origin:left center;
  transition:transform .3s cubic-bezier(.22,1,.36,1);pointer-events:none;
}
.menu a:hover::after,.menu a.active::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:12px;font-weight:600;font-size:14.5px;
  border:1px solid transparent;cursor:pointer;transition:.22s;white-space:nowrap;
  position:relative;overflow:hidden;
}
.btn-primary{background:var(--grad);color:#04111f;box-shadow:0 10px 30px -10px rgba(34,170,255,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -12px rgba(34,170,255,.85)}
/* 主按钮高光扫过 —— 覆盖层不参与命中测试 */
.btn-primary::after{
  content:"";position:absolute;top:-10%;bottom:-10%;left:-50%;width:36%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-18deg);transition:left .62s cubic-bezier(.4,0,.2,1);
}
.btn-primary:hover::after{left:125%}
.btn-ghost{background:var(--surface);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--border-strong);background:var(--surface-2)}
.btn-sm{padding:8px 15px;font-size:13.5px}
.nav-toggle{display:none;background:none;border:1px solid var(--border);border-radius:10px;width:42px;height:38px;color:var(--text);font-size:20px;cursor:pointer}

/* ===================== 通用区块 ===================== */
section{padding:96px 0;position:relative}
.sec-head{max-width:760px;margin:0 auto 56px;text-align:center}
.eyebrow{
  display:inline-block;font-family:var(--mono);font-size:12.5px;letter-spacing:3px;
  color:var(--cyan);padding:6px 14px;border:1px solid var(--border);border-radius:999px;
  background:var(--surface);margin-bottom:18px;text-transform:uppercase;
}
.sec-head h2{
  font-size:clamp(28px,4vw,42px);font-weight:800;line-height:1.2;letter-spacing:.5px;
  background:linear-gradient(180deg,#fff,#bcd2ff);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.sec-head p{margin-top:16px;color:var(--muted);font-size:16.5px}

/* ===================== HERO ===================== */
.hero{padding:120px 0 90px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-eyebrow{font-family:var(--mono);color:var(--cyan);letter-spacing:3px;font-size:13px;margin-bottom:20px}
.hero h1{
  font-size:clamp(36px,5.4vw,62px);font-weight:850;line-height:1.08;letter-spacing:1px;
  background:linear-gradient(180deg,#ffffff 30%,#9fc2ff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{margin:24px 0 32px;font-size:17px;color:var(--muted);max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:42px;max-width:480px}
.hstat{padding:16px 18px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}
.hstat b{display:block;font-size:26px;font-weight:800;font-family:var(--mono);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hstat span{font-size:13px;color:var(--dim)}

/* HERO 视觉：传感网络雷达 */
.hero-visual{position:relative;aspect-ratio:1/1;display:grid;place-items:center}
.radar{position:absolute;inset:0;display:grid;place-items:center}
.radar svg{width:100%;height:100%}
.ring{fill:none;stroke:rgba(120,170,255,.18);stroke-width:1}
.ring.dash{stroke-dasharray:4 8;stroke:rgba(56,189,248,.28)}
.sweep{transform-origin:300px 300px;animation:spin 6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.node{fill:var(--cyan);filter:drop-shadow(0 0 6px var(--cyan))}
.node.pulse{animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{r:5;opacity:1}50%{r:9;opacity:.5}}
.float-card{
  position:absolute;background:rgba(10,16,30,.85);border:1px solid var(--border-strong);
  border-radius:12px;padding:10px 14px;font-size:12.5px;backdrop-filter:blur(8px);
  box-shadow:var(--glow);animation:floaty 5s ease-in-out infinite;
}
.float-card b{color:var(--cyan);font-family:var(--mono)}
.float-card.c1{top:6%;left:-4%;animation-delay:0s}
.float-card.c2{top:42%;right:-8%;animation-delay:1.4s}
.float-card.c3{bottom:8%;left:6%;animation-delay:2.6s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ===================== 卡片通用 ===================== */
.card{
  position:relative;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px;transition:.28s;overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:var(--radius);padding:1px;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.28s;
  pointer-events:none;  /* 渐变描边层不得拦截卡片内按钮/链接的点击 */
}
.card:hover{transform:translateY(-6px);background:var(--surface-2)}
.card:hover::before{opacity:.9}
.card .glow-top{position:absolute;top:-40%;left:50%;width:70%;height:80%;
  transform:translateX(-50%);background:radial-gradient(closest-side,rgba(56,160,255,.22),transparent);opacity:0;transition:.3s;pointer-events:none}
.card:hover .glow-top{opacity:1}

/* 优势 */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv .ico{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;
  background:var(--grad-soft);border:1px solid var(--border);margin-bottom:18px;
}
.adv h3{font-size:18px;margin-bottom:8px}
.adv p{color:var(--muted);font-size:14.5px}

/* 传感设备 */
.sensor-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sensor .tag{font-family:var(--mono);font-size:11.5px;letter-spacing:1px;color:var(--cyan);
  border:1px solid var(--border);padding:3px 10px;border-radius:999px;display:inline-block;margin-bottom:14px}
.sensor h3{font-size:18.5px;margin-bottom:10px}
.sensor p{color:var(--muted);font-size:14px;min-height:66px}
.spec{margin-top:16px;border-top:1px solid var(--border);padding-top:14px;display:grid;gap:8px}
.spec .row{display:flex;justify-content:space-between;font-size:13px}
.spec .row span{color:var(--dim)}
.spec .row b{font-family:var(--mono);color:var(--text);font-weight:600}

/* 场景 */
.scn-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.scn-tab{
  padding:10px 18px;border-radius:999px;border:1px solid var(--border);
  background:var(--surface);color:var(--muted);cursor:pointer;font-size:14.5px;font-weight:500;transition:.2s
}
.scn-tab:hover{color:var(--text);border-color:var(--border-strong)}
.scn-tab.active{background:var(--grad);color:#04111f;border-color:transparent;font-weight:700}
.scn-panel{display:none;animation:fade .4s ease}
.scn-panel.active{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.scn-info h3{font-size:26px;margin-bottom:12px}
.scn-info>p{color:var(--muted);margin-bottom:20px}
.scn-info ul{list-style:none;display:grid;gap:12px}
.scn-info li{display:flex;gap:12px;align-items:flex-start;color:var(--text);font-size:15px}
.scn-info li svg{flex:0 0 auto;margin-top:3px}
.scn-visual{
  border:1px solid var(--border);border-radius:var(--radius);padding:30px;
  background:linear-gradient(160deg,rgba(20,30,55,.6),rgba(10,16,30,.4));min-height:280px;
  display:flex;flex-direction:column;justify-content:center;gap:14px;
}
.scn-visual .chips{display:flex;flex-wrap:wrap;gap:10px}
.scn-visual .chip{padding:9px 14px;border-radius:10px;background:var(--surface-2);
  border:1px solid var(--border);font-size:13.5px;font-weight:500}

/* 平台 */
.platform-layers{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:36px 0;position:relative}
.plyr{padding:26px 20px;text-align:center;border:1px solid var(--border);position:relative}
.plyr:not(:last-child){border-right:none}
.plyr .num{font-family:var(--mono);color:var(--cyan);font-size:13px;letter-spacing:2px}
.plyr h4{font-size:17px;margin:10px 0 8px}
.plyr p{color:var(--muted);font-size:13.5px}
.plyr .bar{height:3px;background:var(--grad);border-radius:3px;margin-top:14px}
.pf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.pf{padding:22px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}
.pf b{display:block;color:var(--cyan);margin-bottom:6px;font-size:15.5px}
.pf span{color:var(--muted);font-size:13.5px}

/* 数据条 */
.stat-band{border:1px solid var(--border);border-radius:var(--radius);
  background:linear-gradient(120deg,rgba(20,30,55,.5),rgba(10,16,30,.3));padding:44px 30px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat b{display:block;font-size:clamp(30px,4vw,46px);font-weight:850;font-family:var(--mono);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:14.5px}

/* 案例 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case .meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.case .scene{font-family:var(--mono);font-size:11.5px;color:var(--cyan);border:1px solid var(--border);
  padding:3px 10px;border-radius:999px}
.case .region{font-size:12.5px;color:var(--dim)}
.case h3{font-size:18px;line-height:1.4;margin-bottom:10px;min-height:50px}
.case p{color:var(--muted);font-size:14px;min-height:84px}
.case .res{margin-top:14px;padding-top:14px;border-top:1px solid var(--border);font-size:13.5px;color:var(--text)}
.case .res b{color:var(--amber)}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-grid p.lead{color:var(--muted);font-size:16.5px;margin-bottom:24px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ap{padding:18px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}
.ap b{display:block;color:var(--cyan);margin-bottom:6px;font-size:15px}
.ap span{color:var(--muted);font-size:13.5px}
.about-visual{border:1px solid var(--border);border-radius:var(--radius);min-height:340px;
  background:radial-gradient(circle at 50% 40%,rgba(34,120,255,.16),transparent 65%),linear-gradient(160deg,rgba(20,30,55,.5),rgba(10,16,30,.3));
  display:grid;place-items:center;padding:30px}
.about-visual svg{width:100%;max-width:340px}

/* CTA */
.cta-band{text-align:center;border:1px solid var(--border-strong);border-radius:24px;
  padding:60px 30px;background:linear-gradient(120deg,rgba(34,120,255,.12),rgba(99,102,241,.10));position:relative;overflow:hidden}
.cta-band h2{font-size:clamp(26px,3.6vw,38px);font-weight:800;margin-bottom:14px}
.cta-band p{color:var(--muted);margin-bottom:26px;font-size:16px}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info .ci{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-info .ci .ico{width:42px;height:42px;flex:0 0 auto;border-radius:11px;display:grid;place-items:center;
  background:var(--grad-soft);border:1px solid var(--border)}
.contact-info .ci b{font-size:14px;color:var(--dim);font-weight:500;display:block}
.contact-info .ci span{font-size:16px;color:var(--text)}
.form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.form .f{margin-bottom:16px}
.form label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:7px}
.form input,.form textarea{
  width:100%;padding:12px 14px;border-radius:11px;background:rgba(2,6,16,.6);
  border:1px solid var(--border);color:var(--text);font-family:var(--font);font-size:14.5px;transition:.2s
}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.form textarea{resize:vertical;min-height:110px}
.form .note{font-size:12.5px;color:var(--dim);margin-top:10px}
.alert{margin:14px 0;padding:12px 16px;border-radius:11px;font-size:14px;border:1px solid var(--border)}
.alert.ok{background:rgba(34,200,120,.12);border-color:rgba(34,200,120,.4);color:#7ee2a8}
.alert.err{background:rgba(251,113,133,.12);border-color:rgba(251,113,133,.4);color:#ffb3c0}

/* 页脚 */
.footer{border-top:1px solid var(--border);padding:56px 0 30px;margin-top:40px;background:rgba(7,11,22,.6)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:36px}
.foot-grid h4{font-size:14px;color:var(--dim);letter-spacing:1px;margin-bottom:16px;text-transform:uppercase}
.foot-grid a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:.2s}
.foot-grid a:hover{color:var(--text)}
.foot-about p{color:var(--muted);font-size:14px;max-width:300px;margin-top:14px}
.foot-legal{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:baseline;margin-top:26px;
  color:var(--dim);font-size:13px;line-height:1.7}
.foot-legal strong{color:var(--text);font-weight:600;font-size:13.5px;letter-spacing:.2px}
.foot-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:10px;color:var(--dim);font-size:13px}
.foot-bottom a{color:var(--dim)}
.foot-bottom a:hover{color:var(--text)}
.foot-bottom a.beian{text-decoration:none;border-bottom:1px solid rgba(148,163,184,.35);transition:.2s}
.foot-bottom a.beian:hover{color:var(--text);border-bottom-color:var(--cyan)}

/* ===================== 后台 ===================== */
.admin-wrap{max-width:920px;margin:40px auto;padding:0 20px}
.admin-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:30px}
.admin-card h1{font-size:24px;margin-bottom:6px}
.admin-card .sub{color:var(--muted);margin-bottom:24px;font-size:14.5px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:7px}
.field input,.field textarea{width:100%;padding:11px 13px;border-radius:10px;background:rgba(2,6,16,.6);
  border:1px solid var(--border);color:var(--text);font-size:14.5px;font-family:var(--font)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.field textarea{min-height:90px;resize:vertical;font-family:var(--mono);font-size:13px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.admin-login{max-width:420px;margin:120px auto}
.admin-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}
.admin-bar .tag{font-family:var(--mono);font-size:12px;color:var(--cyan);letter-spacing:1px}
.admin-nav{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.admin-nav button{background:var(--surface);border:1px solid var(--border);color:var(--muted);
  padding:9px 16px;border-radius:10px;cursor:pointer;font-size:14px;transition:.2s}
.admin-nav button.active{background:var(--grad);color:#04111f;border-color:transparent;font-weight:700}
.admin-sec{display:none}.admin-sec.active{display:block}
.admin-foot{margin-top:30px;padding-top:20px;border-top:1px solid var(--border);color:var(--dim);font-size:13px}

/* =========================================================
   科技感增强层 · Sci-Tech Layer
   ---------------------------------------------------------
   三条硬约束（改动前务必遵守）：
   1) 只增加视觉与动效，不改变既有盒模型尺寸 → 不影响布局与响应式；
   2) 所有新增的覆盖层 / 伪元素一律 pointer-events:none
      （历史上 .card::before 漏写此属性，导致卡片内按钮点不动）；
   3) 全部动效可被 prefers-reduced-motion 关闭，并尊重触屏设备。
   ===================================================== */

/* ---------- 1. 区块标题：状态点 + 渐变下划线 ---------- */
.eyebrow{position:relative}
.eyebrow::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:8px;
  vertical-align:middle;background:var(--cyan);box-shadow:0 0 10px var(--cyan);
  animation:blip 2.2s ease-in-out infinite;
}
@keyframes blip{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.3;transform:scale(.7)}}
/* h2 用了 background-clip:text，子元素自带背景，不受影响 */
.sec-head h2::after{
  content:"";display:block;width:78px;height:2px;margin:20px auto 0;border-radius:2px;
  background:var(--grad);box-shadow:0 0 16px rgba(34,211,238,.55);
}

/* ---------- 2. Hero：粒子网络 + 扫描线 + 终端光标 ---------- */
.hero{isolation:isolate}
.hero-canvas{
  position:absolute;inset:0;width:100%;height:100%;z-index:0;
  pointer-events:none;opacity:.9;
}
.hero .wrap{position:relative;z-index:1}
/* 自上而下的扫描光带：只在桌面端显示（见响应式段） */
.hero::after{
  content:"";position:absolute;left:0;right:0;top:0;height:180px;z-index:0;pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(34,211,238,.05) 42%,rgba(34,211,238,.13) 50%,rgba(34,211,238,.05) 58%,transparent);
  animation:scanY 7.5s linear infinite;will-change:transform;
}
@keyframes scanY{0%{transform:translateY(-190px)}100%{transform:translateY(860px)}}
/* 终端式光标。必须是 inline-block：块级元素会撑满整行，
   光标的 right:0 就会飘到整行最右端，而不是紧贴文字末尾。 */
.hero-eyebrow{position:relative;display:inline-block;padding-right:15px}
.hero-eyebrow::after{
  content:"▌";position:absolute;right:0;top:0;color:var(--cyan);
  animation:caret 1.05s steps(1,end) infinite;
}
@keyframes caret{0%,49%{opacity:1}50%,100%{opacity:0}}

/* ---------- 3. 卡片：跟随鼠标的聚光 + 高光描边 ---------- */
.card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;
  transition:opacity .32s ease;
  background:radial-gradient(320px circle at var(--mx,50%) var(--my,0%),rgba(56,189,248,.15),transparent 62%);
}
.card:hover::after{opacity:1}

/* ---------- 4. HUD 四角角标（工程感的来源）---------- */
.stat-band,.cta-band,.about-visual,.scn-visual,.hero-visual{position:relative}
.stat-band::after,.cta-band::after,.about-visual::after,.scn-visual::after,.hero-visual::after{
  content:"";position:absolute;inset:9px;border-radius:10px;pointer-events:none;opacity:.7;
  background:
    linear-gradient(var(--hud-c),var(--hud-c)) left top/20px 2px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) left top/2px 20px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) right top/20px 2px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) right top/2px 20px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) left bottom/20px 2px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) left bottom/2px 20px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) right bottom/20px 2px no-repeat,
    linear-gradient(var(--hud-c),var(--hud-c)) right bottom/2px 20px no-repeat;
}

/* ---------- 5. 首页数据卡 / 统计数字：角落切光 ---------- */
.hstat{position:relative;overflow:hidden}
.hstat::after{
  content:"";position:absolute;right:0;top:0;width:30px;height:30px;pointer-events:none;
  background:linear-gradient(225deg,rgba(56,189,248,.32),transparent 72%);
}
.plyr{transition:background .28s ease}
.plyr:hover{background:rgba(56,189,248,.045)}

/* ---------- 6. 遥测数据流（跑马灯）---------- */
.ticker{
  position:relative;overflow:hidden;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  background:linear-gradient(90deg,rgba(7,11,22,.92),rgba(11,17,32,.72),rgba(7,11,22,.92));
}
.ticker-inner{display:flex;width:max-content;animation:tick 44s linear infinite;will-change:transform}
.ticker:hover .ticker-inner{animation-play-state:paused}
.ticker-inner span{
  display:inline-flex;align-items:center;gap:9px;padding:12px 26px;white-space:nowrap;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.8px;color:var(--muted);
}
.ticker-inner span i{
  width:5px;height:5px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);flex:0 0 auto;
}
.ticker-inner span b{color:var(--cyan-2);font-weight:600}
.ticker::before,.ticker::after{content:"";position:absolute;top:0;bottom:0;width:130px;z-index:2;pointer-events:none}
.ticker::before{left:0;background:linear-gradient(90deg,var(--bg),transparent)}
.ticker::after{right:0;background:linear-gradient(270deg,var(--bg),transparent)}
@keyframes tick{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 7. 滚动进场 ----------
   用 animation 而非 transition：transition 会被本规则整体接管，
   从而把卡片原有的 .28s 悬停过渡拖成 .75s。animation 与 transition 互不干扰。
   位移用 translate 属性（与 transform 叠加），避免盖掉 .card:hover 的 -6px 抬升。

   ⚠ 不要把 .scn-visual 加进来：它位于 .scn-panel 内，未激活的面板是 display:none，
     观察器永远不会判定其进入视口 → 用户切换场景标签后该块会一直 opacity:0。
     场景面板自身已有 .scn-panel.active 的 fade 动画，无需重复。 */
html.js-anim .sec-head,
html.js-anim .card,
html.js-anim .stat-band,
html.js-anim .cta-band,
html.js-anim .about-visual,
html.js-anim .pf,
html.js-anim .plyr,
html.js-anim .ap,
html.js-anim .contact-info,
html.js-anim .form,
html.js-anim .ticker{
  opacity:0;
}
html.js-anim .revealed{animation:revealUp .72s cubic-bezier(.22,1,.36,1) both}
@keyframes revealUp{
  from{opacity:0;translate:0 22px}
  to{opacity:1;translate:0 0}
}
/* 栅格内的错峰延迟（animation-delay 只在该元素真正开始进场时生效） */
html.js-anim .adv-grid>*:nth-child(2),html.js-anim .sensor-grid>*:nth-child(2),
html.js-anim .case-grid>*:nth-child(2),html.js-anim .pf-grid>*:nth-child(2),
html.js-anim .stat-grid>*:nth-child(2),html.js-anim .platform-layers>*:nth-child(2),
html.js-anim .about-points>*:nth-child(2){animation-delay:.07s}
html.js-anim .adv-grid>*:nth-child(3),html.js-anim .sensor-grid>*:nth-child(3),
html.js-anim .case-grid>*:nth-child(3),html.js-anim .pf-grid>*:nth-child(3),
html.js-anim .stat-grid>*:nth-child(3),html.js-anim .platform-layers>*:nth-child(3),
html.js-anim .about-points>*:nth-child(3){animation-delay:.14s}
html.js-anim .adv-grid>*:nth-child(4),html.js-anim .sensor-grid>*:nth-child(4),
html.js-anim .case-grid>*:nth-child(4),html.js-anim .pf-grid>*:nth-child(4),
html.js-anim .stat-grid>*:nth-child(4),html.js-anim .platform-layers>*:nth-child(4),
html.js-anim .about-points>*:nth-child(4){animation-delay:.21s}
html.js-anim .sensor-grid>*:nth-child(5),
html.js-anim .case-grid>*:nth-child(5),
html.js-anim .pf-grid>*:nth-child(5){animation-delay:.28s}
html.js-anim .sensor-grid>*:nth-child(6),
html.js-anim .case-grid>*:nth-child(6),
html.js-anim .pf-grid>*:nth-child(6){animation-delay:.35s}

/* ---------- 10. 常见问题 FAQ（同时是 SEO / AI 搜索的重要内容载体）---------- */
.faq-list{display:grid;gap:12px}
.faq-item{
  position:relative;border:1px solid var(--border);border-radius:14px;
  background:var(--surface);overflow:hidden;
  transition:border-color .24s,background .24s;
}
.faq-item:hover{border-color:var(--border-strong);background:var(--surface-2)}
.faq-item[open]{border-color:var(--border-strong);background:var(--surface-2)}
.faq-q{
  display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:18px 22px;cursor:pointer;list-style:none;
  font-size:15.5px;font-weight:600;color:var(--text);line-height:1.55;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::marker{content:""}
.faq-q:focus-visible{outline:2px solid var(--cyan);outline-offset:-3px;border-radius:14px}
/* 加减号指示器：两条线组成，展开时竖线旋转收起 */
.faq-mark{
  position:relative;flex:0 0 auto;width:18px;height:18px;margin-top:3px;
  pointer-events:none;
}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--cyan);
  border-radius:2px;transition:transform .26s cubic-bezier(.22,1,.36,1),opacity .26s;
  pointer-events:none;
}
.faq-mark::before{width:14px;height:1.6px;transform:translate(-50%,-50%)}
.faq-mark::after{width:1.6px;height:14px;transform:translate(-50%,-50%)}
.faq-item[open] .faq-mark::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{
  padding:0 22px 20px;color:var(--muted);font-size:14.5px;line-height:1.85;
  border-top:1px solid var(--line);padding-top:16px;margin:0 0 0;
  text-align:justify;
}
/* 展开动画（仅在支持 interpolate-size 的浏览器生效，其余浏览器直接展开，功能不受影响） */
@supports (interpolate-size:allow-keywords){
  .faq-item{interpolate-size:allow-keywords}
  .faq-item::details-content{transition:content-visibility .28s allow-discrete,height .28s}
}

/* ===================== 响应式 =====================
   说明：以下规则全部写在媒体查询内，桌面端(>980px)样式完全不受影响。
   ================================================= */

/* ---------- 平板 / 小笔电 ---------- */
@media(max-width:980px){
  html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
  /* 7 项导航 + 2 个按钮在 1000px 以下挤不下（会换行挤压品牌区），≤980 统一收进汉堡菜单 */
  .nav-inner{height:64px}
  .menu{display:none}
  .nav-cta{gap:8px}
  .nav-cta .btn-ghost{display:none}
  .nav-toggle{display:block}
  .menu.open{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    align-items:stretch;gap:2px;padding:10px 14px 14px;
    background:rgba(7,11,22,.98);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--border);box-shadow:0 24px 40px -20px rgba(0,0,0,.9);
    max-height:72vh;overflow-y:auto;overscroll-behavior:contain}
  .menu.open a{padding:14px 12px;font-size:15.5px;border-radius:10px;border-bottom:1px solid var(--border)}
  .menu.open a:last-child{border-bottom:none}

  .hero-grid,.scn-panel.active,.about-grid,.contact-grid{grid-template-columns:1fr}
  /* width:100% 必须显式给：单列时子元素全为绝对定位，配合 margin:auto 会让宽度按 fit-content 塌成 0 */
  .hero-visual{order:-1;width:100%;max-width:380px;margin:0 auto}
  .float-card.c1{left:0}
  .float-card.c2{right:0}
  .float-card.c3{left:4%}
  .adv-grid,.sensor-grid,.case-grid,.pf-grid,.stat-grid,.platform-layers,.about-points{grid-template-columns:repeat(2,1fr)}
  .plyr{border-right:1px solid var(--border)!important;border-bottom:none}
  .foot-grid{grid-template-columns:1fr 1fr}
  .foot-about{grid-column:1/-1}
  .plyr{padding:22px 18px}
}

/* ---------- 手机 ---------- */
@media(max-width:680px){
  /* --- 导航（在 ≤980 已切汉堡，这里只做尺寸微调） --- */
  .nav-inner{height:60px}
  .brand{gap:9px}
  .brand .logo{width:35px;height:30px}
  .brand .bn{font-size:16px}
  .brand .bn small{font-size:9.5px;letter-spacing:1.6px}
  .nav-cta .btn-primary{padding:8px 12px;font-size:13px;border-radius:10px}
  .nav-toggle{width:40px;height:36px;font-size:19px;line-height:1}
  .menu.open{top:60px}

  /* --- 容器与区块留白 --- */
  .wrap{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
  section{padding:46px 0}
  .sec-head{margin-bottom:26px}
  .sec-head h2{font-size:clamp(22px,6.6vw,28px)}
  .sec-head p{font-size:14.5px;margin-top:10px}
  .eyebrow{font-size:11.5px;letter-spacing:2px;padding:5px 11px;margin-bottom:12px}
  .card{padding:20px;border-radius:16px}
  .card:hover{transform:none}
  .sensor p,.case p,.case h3{min-height:0}

  /* --- 首屏 --- */
  .hero{padding:30px 0 6px}
  .hero-grid{gap:22px}
  .hero-visual{max-width:260px}
  .float-card{display:none}          /* 手机端隐藏浮动卡片，避免压住主标题 */
  .hero-eyebrow{font-size:11.5px;letter-spacing:2px;margin-bottom:12px}
  .hero h1{font-size:clamp(26px,7.8vw,34px);line-height:1.24;letter-spacing:0}
  .hero p.lead{margin:16px 0 22px;font-size:15.5px;max-width:none}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 140px;justify-content:center;padding:12px 16px}
  .hero-stats{grid-template-columns:1fr 1fr;gap:10px;margin-top:26px;max-width:none}
  .hstat{padding:13px 14px;border-radius:12px}
  .hstat b{font-size:22px}
  .hstat span{font-size:12px}

  /* --- 栅格统一单列 --- */
  .adv-grid,.sensor-grid,.case-grid,.pf-grid,.platform-layers,.about-points,.grid2{grid-template-columns:1fr}
  .adv-grid,.sensor-grid,.case-grid,.pf-grid{gap:14px}
  .stat-grid{grid-template-columns:1fr 1fr;gap:16px 12px}
  .stat-band{padding:26px 18px;border-radius:16px}
  .stat b{font-size:clamp(26px,8vw,34px)}

  /* --- 平台分层：手机端改为圆角卡片堆叠 --- */
  .platform-layers{margin:20px 0}
  .plyr{padding:18px 16px;text-align:left;border:1px solid var(--border);border-radius:14px;margin-bottom:10px}
  .plyr:last-child{margin-bottom:0}
  .plyr .bar{max-width:120px;margin-top:12px}

  /* --- 场景切换 --- */
  .scn-tabs{gap:8px;margin-bottom:22px}
  .scn-tab{padding:9px 14px;font-size:13.5px}
  .scn-info h3{font-size:21px}
  .scn-info>p{margin-bottom:16px;font-size:14.5px}
  .scn-info li{font-size:14.5px}
  .scn-visual{padding:18px;min-height:0;border-radius:16px}

  /* --- 关于 --- */
  .about-grid{gap:26px}
  .about-grid p.lead{font-size:15.5px;margin-bottom:18px}
  .about-visual{min-height:220px;padding:18px}
  .ap{padding:16px}

  /* --- 联系 --- */
  .contact-grid{gap:22px}
  .contact-info .ci{padding:14px 0;gap:12px}
  .contact-info .ci span{font-size:15px;word-break:break-word}
  .form{padding:20px;border-radius:16px}
  .form input,.form textarea{font-size:16px}   /* 16px 以上可避免 iOS 聚焦时自动放大 */

  /* --- CTA --- */
  .cta-band{padding:34px 20px;border-radius:18px}
  .cta-band h2{font-size:clamp(21px,6.2vw,26px)}
  .cta-band p{font-size:14.5px;margin-bottom:22px}
  .cta-band .btn{width:100%;justify-content:center}

  /* --- 页脚 --- */
  .footer{padding:36px 0 calc(20px + env(safe-area-inset-bottom));margin-top:26px}
  .foot-grid{gap:22px 16px;margin-bottom:22px}
  .foot-grid h4{margin-bottom:10px}
  .foot-grid a{padding:8px 0;font-size:14px}
  .foot-about p{max-width:none;font-size:13.5px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:6px}

  /* --- 后台 --- */
  .admin-wrap{margin:20px auto;padding:0 16px}
  .admin-card{padding:20px;border-radius:16px}
  .admin-card h1{font-size:20px}
  .admin-login{margin:48px auto}
  .admin-nav{gap:6px;margin-bottom:18px}
  .admin-nav button{padding:8px 12px;font-size:13px}
  .field input,.field textarea{font-size:16px}
  .admin-bar{flex-wrap:wrap;gap:8px}
  /* 后台顶栏的"预览前台/退出"是关键操作，手机端必须保留（前台导航才隐藏） */
  .nav-cta.nav-cta-admin .btn-ghost{display:inline-flex}
  .nav-cta.nav-cta-admin .btn-sm{padding:7px 11px;font-size:12.5px}
}

/* ---------- 超小屏 ---------- */
@media(max-width:380px){
  .hero-stats{grid-template-columns:1fr}
  .nav-cta .btn-primary{display:none}
  .brand .bn small{display:none}
  .brand .bn{font-size:15px}
}

/* ---------- 触屏设备：去掉残留悬停态、放大点击区域 ---------- */
@media(hover:none){
  .card:hover{transform:none;background:var(--surface)}
  .btn-primary:hover{transform:none}
  .menu a,.foot-grid a{min-height:44px;display:flex;align-items:center}
  .nav-toggle,.scn-tab,.btn{-webkit-tap-highlight-color:rgba(34,211,238,.15)}
}

/* ============ 科技感增强层 · 移动端适配 ============ */
@media(max-width:980px){
  /* 扫描光带行程按 980 以下高度缩短，避免跑到区块外 */
  .hero::after{animation-duration:6s}
}
@media(max-width:680px){
  /* 手机端关掉扫描线与鼠标聚光层：无 hover 语义，且省电/省渲染 */
  .hero::after{display:none}
  .card::after{display:none}
  .btn-primary::after{display:none}
  .hero-canvas{opacity:.5}
  .ticker-inner{animation-duration:34s}
  .ticker-inner span{padding:10px 17px;font-size:11.5px;letter-spacing:.4px}
  .ticker::before,.ticker::after{width:56px}
  .sec-head h2::after{width:62px;margin-top:14px}
  .stat-band::after,.cta-band::after,.about-visual::after,.scn-visual::after,.hero-visual::after{inset:6px}
  .hstat::after{width:22px;height:22px}
  /* FAQ 在手机上收紧内边距，保证长问答的阅读宽度 */
  .faq-q{padding:16px 16px;font-size:15px;gap:12px}
  .faq-a{padding:14px 16px 18px;font-size:14px;line-height:1.8}
}
/* 触屏设备：无 hover，纯装饰层直接不渲染 */
@media(hover:none){
  .card::after{display:none}
  .btn-primary::after{display:none}
}

/* ---------- 无障碍：尊重"减弱动效"偏好 ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  /* 关掉动效后必须保证内容可见（否则 opacity:0 的进场元素会永远不出现） */
  html.js-anim .sec-head,html.js-anim .card,html.js-anim .stat-band,html.js-anim .cta-band,
  html.js-anim .about-visual,html.js-anim .pf,html.js-anim .plyr,
  html.js-anim .ap,html.js-anim .contact-info,html.js-anim .form,html.js-anim .ticker{
    opacity:1!important;translate:none!important;animation:none!important;
  }
  .hero::after,.scroll-progress i{animation:none}
  .ticker-inner{animation:none}
  .eyebrow::before{animation:none}
  .hero-eyebrow::after{animation:none;opacity:1}
}

/* =========================================================
   产品矩阵 · 大类 → 产品族 → 型号（2026-09-18）
   ---------------------------------------------------------
   全部为新增类名，不复用 .sensor / .sensor-grid，
   避免影响首页既有栅格、卡片尺寸与入场动画节奏。
   .pfam 复用 .card 类，因此自动继承进场动画与鼠标聚光。
   ===================================================== */

/* ---------- 顶部规模概览 ---------- */
.mx-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:0 auto 30px;max-width:920px;
}
.mx-stat{
  background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:18px 14px;text-align:center;transition:.25s;
}
.mx-stat:hover{border-color:var(--border-strong);background:var(--surface-2);transform:translateY(-2px)}
.mx-stat b{
  display:block;font-family:var(--mono);font-size:30px;line-height:1;font-weight:700;
  background:linear-gradient(180deg,#fff,#9fc2ff);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.mx-stat span{display:block;margin-top:9px;font-size:13px;color:var(--muted);letter-spacing:.5px}

/* ---------- 精度档位图例 ---------- */
.mx-legend-cap{
  text-align:center;font-family:var(--mono);font-size:12px;letter-spacing:1.4px;
  color:var(--muted);margin-bottom:14px;
}
.mx-legend-cap::before{content:"◆";color:var(--cyan);margin-right:8px;font-size:9px;vertical-align:2px}
.mx-legend{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:34px}
.mx-legend-item{
  background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:18px 20px;transition:.25s;
}
.mx-legend-item:hover{border-color:var(--border-strong);background:var(--surface-2)}
.mx-legend-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.mx-legend-k{font-family:var(--mono);font-size:13px;color:var(--text);font-weight:600;letter-spacing:.4px}
.mx-legend-item p{color:var(--muted);font-size:13.5px;line-height:1.8}

/* ---------- 分类锚点导航 ---------- */
.mx-nav{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
  padding:18px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.mx-nav a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);text-decoration:none;white-space:nowrap;
  padding:8px 10px 8px 16px;border-radius:999px;border:1px solid var(--border);
  background:var(--surface);transition:.2s;
}
.mx-nav a b{
  font-family:var(--mono);font-size:11.5px;font-weight:600;color:var(--cyan);
  background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.24);
  min-width:24px;text-align:center;padding:2px 6px;border-radius:999px;
}
.mx-nav a:hover{color:var(--text);border-color:var(--cyan);transform:translateY(-2px)}

/* ---------- 分类区块 ---------- */
.sgroup{scroll-margin-top:92px}
/* 标题左沿与下方卡片对齐；正文单独限宽，避免长行难读 */
.sgroup .sgroup-head{max-width:none;margin:0 0 30px;text-align:left}
.sgroup .sgroup-head p{max-width:900px}
.sgroup-head h2{font-size:clamp(22px,2.7vw,30px)}
.sgroup-head h2::after{margin-left:0;margin-right:auto;width:62px;margin-top:16px}
.sgroup-head p{font-size:15.5px}
.sgroup-eyebrow{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:4px}
.sgroup-eyebrow .eyebrow{margin-bottom:0}
.sgroup-meta{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.6px;color:var(--dim);
  border:1px solid var(--border);border-radius:999px;padding:5px 12px;background:var(--surface);
}

/* ---------- 产品族卡片 ---------- */
/* 用 flex + 居中对齐而不是 grid：一个产品族数量不是 3 的倍数时（如 7 个族 = 3+3+1），
   最后一行剩下的卡片会居中，而不是靠左留出两个空栏。卡片宽度仍按 3 栏计算。 */
.pfam-grid{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}
.pfam-grid>.pfam{flex:0 1 calc((100% - 40px)/3);min-width:0}
.pfam-grid.cols-2>.pfam{flex-basis:calc((100% - 20px)/2)}
/* 只有 1 个产品族的大类：单张「整幅卡」横向排布，规格与型号列在右侧，不留下大块空栏 */
.pfam-grid.cols-1>.pfam{flex-basis:100%}
.pfam.pfam-hero{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  column-gap:40px;align-items:start;
}
.pfam-hero .pfam-top{grid-column:1;grid-row:1}
.pfam-hero h3{grid-column:1;grid-row:2}
.pfam-hero .pfam-desc{grid-column:1;grid-row:3}
.pfam-hero .pfam-note{grid-column:1;grid-row:4}
.pfam-hero .spec{grid-column:2;grid-row:1 / span 2}
.pfam.pfam-hero .spec{margin-top:0;border-top:0;padding-top:0}
.pfam-hero .mdl{grid-column:2;grid-row:3 / span 2;margin-top:18px;padding-top:14px;border-top:1px dashed var(--border)}
.pfam{padding:22px;display:flex;flex-direction:column}
.pfam-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}
.pfam .tag{
  font-family:var(--mono);font-size:11px;letter-spacing:1px;color:var(--cyan);
  border:1px solid var(--border);padding:3px 10px;border-radius:999px;
  background:var(--surface);white-space:nowrap;
}
.pfam h3{font-size:18px;margin-bottom:10px}
.pfam-desc{color:var(--muted);font-size:13.5px;line-height:1.8}
/* 三栏时统一描述高度，四张卡片的规格表才能对齐；两栏/单栏文案更长，交给内容撑高 */
.pfam-grid.cols-3 .pfam-desc{min-height:78px}

/* 产品族补充说明（可选字段 note，如「量程支持定制」） */
.pfam-note{
  position:relative;font-size:12.5px;line-height:1.75;color:#9fdcff;
  background:linear-gradient(90deg,rgba(34,211,238,.10),rgba(34,211,238,.02));
  border-left:2px solid var(--cyan);border-radius:0 8px 8px 0;
  padding:8px 12px 8px 14px;margin:12px 0 0;letter-spacing:.2px;
}

/* 产品族卡片内的规格表：比首页 .spec 多一层分隔线，长值允许换行不溢出 */
.pfam .spec{margin-top:18px;gap:0;padding-top:4px}
.pfam .spec .row{
  align-items:baseline;gap:16px;padding:8px 0;
  border-bottom:1px solid var(--line);
}
.pfam .spec .row:last-child{border-bottom:0;padding-bottom:0}
.pfam .spec .row span{flex:0 0 auto;letter-spacing:.3px}
.pfam .spec .row b{min-width:0;text-align:right;word-break:break-word;line-height:1.6}

/* ---------- 精度档位徽章 ---------- */
.grade{
  font-family:var(--mono);font-size:11px;letter-spacing:.5px;white-space:nowrap;
  padding:3px 10px;border-radius:999px;border:1px solid;
}
.grade-economy{color:var(--amber);border-color:rgba(245,158,11,.42);background:rgba(245,158,11,.12)}
.grade-standard{color:var(--cyan);border-color:rgba(34,211,238,.42);background:rgba(34,211,238,.12)}
.grade-high{color:var(--violet);border-color:rgba(139,92,246,.45);background:rgba(139,92,246,.14)}

/* ---------- 型号清单 ---------- */
.mdl{margin-top:auto;padding-top:16px;border-top:1px solid var(--border)}
.mdl-h{
  display:flex;align-items:center;justify-content:space-between;
  font-family:var(--mono);font-size:11px;letter-spacing:.6px;color:var(--dim);
  margin-bottom:10px;
}
.mdl-h b{color:var(--cyan)}
.mdl-row{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:7px 0;border-bottom:1px dashed var(--line);
}
.mdl-row:last-child{border-bottom:0;padding-bottom:0}
.mdl-row code{
  font-family:var(--mono);font-size:11px;color:var(--text);white-space:nowrap;
  background:rgba(56,160,255,.12);border:1px solid var(--border);
  padding:2px 7px;border-radius:6px;
}
/* 名称占满剩余宽度在「同一行内」换行，避免长名称被挤到型号编码下面另起一行 */
.mdl-row span{color:var(--muted);font-size:13px;flex:1 1 0;min-width:0}
.mdl-row em.warn{
  font-style:normal;font-size:10.5px;color:var(--amber);margin-left:auto;white-space:nowrap;
  border:1px solid rgba(245,158,11,.35);background:rgba(245,158,11,.08);
  padding:1px 6px;border-radius:5px;
}
/* 合并后只剩单一型号的产品族：把这一行做成「标准配置」的高亮行，避免卡片显得单薄 */
.mdl-single .mdl-row{
  background:rgba(56,189,248,.06);border:1px solid rgba(56,189,248,.16);
  border-radius:10px;padding:9px 11px;
}
.mdl-single .mdl-row code{background:rgba(56,189,248,.20);border-color:rgba(56,189,248,.32)}

/* 栅格错峰进场（延迟只在该元素真正开始进场时生效） */
html.js-anim .pfam-grid>*:nth-child(2){animation-delay:.07s}
html.js-anim .pfam-grid>*:nth-child(3){animation-delay:.14s}
html.js-anim .pfam-grid>*:nth-child(4){animation-delay:.07s}
html.js-anim .pfam-grid>*:nth-child(5){animation-delay:.14s}
html.js-anim .pfam-grid>*:nth-child(6){animation-delay:.21s}

/* ---------- 产品矩阵 · 响应式 ---------- */
@media(max-width:1024px){
  .pfam-grid>.pfam{flex-basis:calc((100% - 20px)/2)}
  .pfam-grid.cols-2>.pfam{flex-basis:calc((100% - 20px)/2)}
  .pfam-grid.cols-3 .pfam-desc{min-height:0}
  .pfam-hero{grid-template-columns:1fr;column-gap:0}
  .pfam-hero .pfam-top,.pfam-hero h3,.pfam-hero .pfam-desc,.pfam-hero .pfam-note,
  .pfam-hero .spec,.pfam-hero .mdl{grid-column:1;grid-row:auto}
  .pfam-hero .spec{margin-top:18px;border-top:1px solid var(--border);padding-top:4px}
  .pfam-hero .mdl{margin-top:auto}
  .mx-stats{grid-template-columns:repeat(4,1fr);gap:12px}
  .mx-stat b{font-size:26px}
  .mx-legend{grid-template-columns:1fr;gap:12px}
}
@media(max-width:680px){
  .pfam-grid{gap:14px}
  .pfam-grid>.pfam,.pfam-grid.cols-2>.pfam,.pfam-grid.cols-1>.pfam{flex-basis:100%}
  .pfam{padding:18px}
  .pfam-grid .pfam-desc{min-height:0}
  .pfam h3{font-size:16.5px}
  .pfam .spec .row{gap:12px}
  .sgroup .sgroup-head{margin-bottom:22px}
  .sgroup-head p{font-size:14.5px}
  .sgroup-eyebrow{gap:9px}
  .sgroup-meta{font-size:11px;padding:4px 10px}
  .mx-stats{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:24px}
  .mx-stat{padding:14px 10px;border-radius:14px}
  .mx-stat b{font-size:23px}
  .mx-stat span{font-size:12px;margin-top:7px}
  .mx-nav{gap:8px;padding:14px 0}
  .mx-nav a{font-size:13px;padding:7px 9px 7px 13px}
  .mx-nav a b{min-width:21px;font-size:11px}
  .mx-legend-item{padding:16px 18px}
  .sgroup{scroll-margin-top:76px}
}

/* ===================================================================
   微信公众号：可点击关注入口 + 关注弹层
   =================================================================== */
.contact-info .ci-act{
  position:relative;cursor:pointer;border-radius:14px;
  padding-left:12px;padding-right:12px;margin:0 -12px;
  transition:background .2s ease,box-shadow .2s ease;
}
.contact-info .ci-act:hover,
.contact-info .ci-act:focus-visible{
  background:rgba(56,189,248,.07);
  box-shadow:inset 0 0 0 1px var(--border);
}
.contact-info .ci-act:focus-visible{outline:none}
.contact-info .ci-act:hover .ico{
  border-color:var(--border-strong);
  box-shadow:0 0 0 1px rgba(56,189,248,.18);
}
.contact-info .ci-act .ci-go{
  margin-left:auto;flex:0 0 auto;padding:0 4px;
  display:flex;align-items:center;gap:6px;
  color:var(--accent);font-size:13px;letter-spacing:.2px;white-space:nowrap;
}
.contact-info .ci-act .ci-go svg{width:17px;height:17px;transition:transform .22s ease}
.contact-info .ci-act .ci-go em{font-style:normal}
.contact-info .ci-act:hover .ci-go svg{transform:translateX(3px)}

/* 弹层 */
html.wx-open{overflow:hidden}
.wx-modal{position:fixed;inset:0;z-index:1200;display:grid;place-items:center;padding:22px}
.wx-modal[hidden]{display:none}
.wx-mask{position:absolute;inset:0;background:rgba(3,7,18,.74);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.wx-card{
  position:relative;width:min(380px,100%);
  background:linear-gradient(180deg,rgba(17,25,43,.99),rgba(8,13,25,.99));
  border:1px solid var(--border-strong);border-radius:22px;
  padding:38px 26px 26px;text-align:center;
  box-shadow:0 30px 90px -20px rgba(0,0,0,.8),var(--glow);
  animation:wxIn .24s cubic-bezier(.22,1,.36,1);
}
@keyframes wxIn{from{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:none}}
.wx-x{
  position:absolute;top:12px;right:12px;width:34px;height:34px;padding:0;
  border:1px solid var(--border);border-radius:10px;background:var(--surface);
  color:var(--muted);display:grid;place-items:center;cursor:pointer;transition:.2s;
}
.wx-x:hover{color:var(--text);border-color:var(--border-strong);background:var(--surface-2)}
.wx-x svg{width:16px;height:16px}
.wx-ico{
  width:56px;height:56px;margin:0 auto 14px;border-radius:16px;
  display:grid;place-items:center;color:var(--cyan-2);
  background:var(--grad-soft);border:1px solid var(--border);
}
.wx-ico svg{width:30px;height:30px}
.wx-card h3{font-size:19px;margin:0 0 10px;color:var(--text);font-weight:600}
.wx-tip{font-size:13.5px;color:var(--muted);line-height:1.7;margin:0 0 18px}
.wx-qr{
  display:block;width:180px;height:180px;object-fit:contain;
  margin:0 auto 16px;padding:8px;border-radius:14px;background:#fff;
}
.wx-name{
  display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:11px 14px;
}
.wx-name span{font-size:16px;font-weight:600;letter-spacing:.3px;color:var(--text)}
.wx-copy{
  display:inline-flex;align-items:center;gap:6px;padding:7px 13px;
  border:0;border-radius:9px;background:var(--grad);color:#04121f;
  font-family:var(--font);font-size:13px;font-weight:600;cursor:pointer;
  white-space:nowrap;transition:filter .2s ease,background .2s ease,color .2s ease;
}
.wx-copy:hover{filter:brightness(1.1)}
.wx-copy svg{width:14px;height:14px}
.wx-copy.done{background:var(--surface-2);color:var(--cyan-2);box-shadow:inset 0 0 0 1px var(--border-strong)}

@media(max-width:680px){
  .contact-info .ci-act{padding-left:10px;padding-right:10px;margin:0 -10px}
  .contact-info .ci-act .ci-go{
    gap:2px;font-size:12px;padding:5px 10px 5px 8px;border-radius:999px;
    background:rgba(56,189,248,.1);box-shadow:inset 0 0 0 1px var(--border);
  }
  .contact-info .ci-act .ci-go svg{width:14px;height:14px}
  .contact-info .ci-act:hover .ci-go svg{transform:none}
  .wx-card{padding:34px 20px 22px;border-radius:20px}
  .wx-card h3{font-size:17.5px}
  .wx-qr{width:158px;height:158px}
}