/* NABTEX 独立站 — 基础样式 */
:root{
  --blue:#1668A8;
  --deep:#0C2B45;
  --navy:#123A5A;
  --light:#4BA9DB;
  --ink:#16212B;
  --grey:#6B7683;
  --line:#E2E8EE;
  --bg:#F6F8FA;
  --white:#fff;
  --radius:14px;
  --shadow:0 2px 10px rgba(12,43,69,.06), 0 12px 34px rgba(12,43,69,.07);
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  overflow-x:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.muted{color:var(--grey)}

/* ---------- header ---------- */
.hdr{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.hdr-in{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand img{height:34px;width:auto}
.brand .bt{font-weight:700;letter-spacing:2.5px;font-size:17px;color:var(--deep);line-height:1}
.brand .bt small{display:block;font-size:9.5px;letter-spacing:2.6px;color:var(--light);font-weight:700;margin-top:2px;line-height:1}
.nav{display:flex;gap:26px;margin-left:auto;align-items:center}
.nav a{font-size:14.5px;font-weight:500;color:var(--navy);padding:6px 0;position:relative}
.nav a:hover{color:var(--blue)}
.nav a.on{color:var(--blue)}
.nav a.on::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--light);border-radius:2px}
.hdr-r{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:12px}
.lang button{border:0;background:transparent;padding:6px 12px;cursor:pointer;font-family:inherit;color:var(--grey);font-weight:600}
.lang button.on{background:var(--blue);color:#fff}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:11px 20px;border-radius:10px;font-size:14.5px;font-weight:600;
  background:var(--blue);color:#fff;border:1px solid var(--blue);transition:.18s;cursor:pointer;
}
.btn:hover{background:var(--deep);border-color:var(--deep);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--blue);border:1px solid #C7DCEA}
.btn.ghost:hover{background:#EAF3F9;color:var(--deep)}
.btn.light{background:#fff;color:var(--deep);border-color:#fff}
.btn.light:hover{background:#E8F2F8}
.btn.wa{background:#1FB57A;border-color:#1FB57A}
.btn.wa:hover{background:#179463;border-color:#179463}
.btn.sm{padding:8px 14px;font-size:13px}

.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;width:40px;height:36px;cursor:pointer}
.burger span{display:block;width:18px;height:2px;background:var(--navy);margin:3px auto;border-radius:2px}
.mnav{display:none;border-top:1px solid var(--line);padding:10px 0 16px}
.mnav a{display:block;padding:10px 0;font-size:15px;border-bottom:1px solid #F1F5F8}
.mnav.open{display:block}

/* ---------- hero ---------- */
.hero{display:grid;grid-template-columns:1fr 1fr;min-height:560px;background:var(--deep)}
.hero-l{display:flex;flex-direction:column;justify-content:center;padding:72px 64px;color:#fff;max-width:640px;margin-left:auto;width:100%}
.hero-r{position:relative;overflow:hidden;background:#0a2337}
.hero-r img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.eyebrow{font-size:12px;letter-spacing:3.4px;text-transform:uppercase;color:var(--light);font-weight:700;margin-bottom:18px}
.hero h1{font-size:52px;line-height:1.08;letter-spacing:-.5px;font-weight:700;color:#fff}
.hero h1 em{font-style:normal;color:var(--light)}
.hero p{margin-top:20px;font-size:16.5px;color:#BFD6E6;max-width:460px}
.hero-btns{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.hero-meta{display:flex;gap:34px;margin-top:44px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14);flex-wrap:wrap}
.hero-meta div b{display:block;font-size:24px;font-weight:700;color:#fff;letter-spacing:-.3px}
.hero-meta div span{font-size:11.5px;letter-spacing:1.4px;text-transform:uppercase;color:#8FB4CE}

/* ---------- section ---------- */
.sec{padding:86px 0}
.sec.tint{background:var(--bg)}
.sec-h{max-width:720px;margin-bottom:44px}
.sec-h h2{font-size:34px;line-height:1.2;letter-spacing:-.4px;color:var(--deep);font-weight:700}
.sec-h p{margin-top:14px;font-size:16px;color:var(--grey)}
.sec-h.center{margin-left:auto;margin-right:auto;text-align:center}
.rule{width:56px;height:3px;background:var(--light);margin:18px 0}
.sec-h.center .rule{margin-left:auto;margin-right:auto}

/* ---------- product cards ---------- */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#CFE1ED}
.card .ph{position:relative;aspect-ratio:4/3;overflow:hidden;background:#EAF0F5}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:.5s}
.card:hover .ph img{transform:scale(1.05)}
.card .bd{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:18px;font-weight:700;color:var(--deep)}
.card .sub{font-size:12px;letter-spacing:1.6px;text-transform:uppercase;color:var(--light);font-weight:700;margin-top:4px}
.card p{font-size:14px;color:var(--grey);margin-top:10px;flex:1}
.spec{list-style:none;margin-top:14px;border-top:1px solid var(--line);padding-top:12px}
.spec li{font-size:13px;color:var(--navy);display:flex;gap:8px;padding:3px 0}
.spec li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--light);margin-top:8px;flex:0 0 auto}
.card .more{margin-top:16px;font-size:13.5px;font-weight:700;color:var(--blue);display:inline-flex;gap:6px;align-items:center}
.card .more:hover{color:var(--deep)}

/* ---------- scene chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip{padding:8px 16px;border:1px solid var(--line);border-radius:999px;font-size:13.5px;font-weight:600;color:var(--navy);background:#fff;cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--light);color:var(--blue)}
.chip.on{background:var(--deep);color:#fff;border-color:var(--deep)}

.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px}
.scene{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:16/11;background:#0C2B45}
.scene img{width:100%;height:100%;object-fit:cover;opacity:.9;transition:.4s}
.scene:hover img{transform:scale(1.06);opacity:1}
.scene .ov{position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,26,42,.05) 40%,rgba(8,26,42,.82));display:flex;flex-direction:column;justify-content:flex-end;padding:16px}
.scene .ov b{color:#fff;font-size:15px;font-weight:700}
.scene .ov span{color:#A8CBDF;font-size:12px;letter-spacing:.4px}

/* ---------- gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gal a{position:relative;display:block;border-radius:10px;overflow:hidden;background:#EAF0F5;aspect-ratio:4/3}
.gal a img{width:100%;height:100%;object-fit:cover;transition:.45s}
.gal a:hover img{transform:scale(1.06)}
.gal a .tag{position:absolute;left:8px;bottom:8px;background:rgba(12,43,69,.78);color:#fff;font-size:10.5px;padding:3px 8px;border-radius:5px;letter-spacing:.3px;opacity:0;transition:.2s}
.gal a:hover .tag{opacity:1}
.gal-more{text-align:center;margin-top:30px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.stats div{padding:32px 24px;text-align:center;border-right:1px solid var(--line)}
.stats div:last-child{border-right:0}
.stats b{display:block;font-size:32px;font-weight:700;color:var(--blue);letter-spacing:-.5px}
.stats span{font-size:12.5px;letter-spacing:1.2px;text-transform:uppercase;color:var(--grey);font-weight:600}

/* ---------- band / cta ---------- */
.band{position:relative;background:var(--deep);color:#fff;overflow:hidden}
.band .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(9,32,52,.78) 0%,rgba(9,32,52,.88) 100%);pointer-events:none}
.band .wrap{position:relative;z-index:2;padding:76px 24px;text-align:center}
.band h2{font-size:32px;font-weight:700;letter-spacing:-.3px}
.band p{margin-top:12px;color:#C4DCEB;font-size:16px}
.band .btns{display:flex;gap:12px;justify-content:center;margin-top:28px;flex-wrap:wrap}

/* ---------- catalogue ---------- */
.dl{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.dl-card{display:flex;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.dl-card .ic{width:58px;height:74px;flex:0 0 auto;border-radius:6px;background:linear-gradient(160deg,var(--blue),var(--deep));color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;letter-spacing:.5px;box-shadow:0 6px 16px rgba(12,43,69,.2)}
.dl-card h3{font-size:19px;color:var(--deep);font-weight:700}
.dl-card .cv{width:132px;flex:0 0 auto;border-radius:6px;overflow:hidden;box-shadow:0 8px 22px rgba(12,43,69,.18);border:1px solid var(--line)}
.dl-card p{font-size:13.5px;color:var(--grey);margin-top:4px}
.dl-card .go{margin-top:12px}

.inside{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:860px;margin:18px auto 0}
.inside span{font-size:13.5px;font-weight:600;color:var(--navy);background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px}
.inside span i{font-style:normal;color:var(--light);font-weight:700;margin-left:2px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.c-list{display:flex;flex-direction:column;gap:14px}
.c-item{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.c-item .ic{width:38px;height:38px;border-radius:9px;background:#EAF3F9;color:var(--blue);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.c-item .ic svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.c-item .k{font-size:11.5px;letter-spacing:1.4px;text-transform:uppercase;color:var(--grey);font-weight:700}
.c-item .v{font-size:16px;font-weight:600;color:var(--deep);margin-top:2px;word-break:break-word}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.form label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--navy);margin-bottom:6px}
.form input,.form textarea,.form select{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 13px;font-size:15px;font-family:inherit;color:var(--ink);background:#FCFDFE;margin-bottom:16px}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--light);box-shadow:0 0 0 3px rgba(75,169,219,.16)}
.form textarea{min-height:110px;resize:vertical}
.form .btn{width:100%}
.form .note{font-size:12px;color:var(--grey);margin-top:10px;text-align:center}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-grid img{border-radius:var(--radius);box-shadow:var(--shadow)}
.ticks{list-style:none;margin-top:20px}
.ticks li{display:flex;gap:10px;padding:7px 0;font-size:15px;color:var(--navy)}
.ticks li b{color:var(--deep)}
.ticks li::before{content:"✓";color:var(--light);font-weight:700}
.fac-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.fac-grid img{border-radius:10px;aspect-ratio:4/3;object-fit:cover;width:100%}

/* ---------- footer ---------- */
.ftr{background:var(--deep);color:#9FBDD1;padding:56px 0 28px;font-size:14px}
.ftr-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1)}
.ftr h4{color:#fff;font-size:13px;letter-spacing:1.6px;text-transform:uppercase;margin-bottom:14px;font-weight:700}
.ftr a{display:block;padding:4px 0;color:#9FBDD1}
.ftr a:hover{color:#fff}
.ftr .fbrand img{height:38px;background:#fff;border-radius:6px;padding:6px 10px}
.ftr .fbrand p{margin-top:14px;max-width:290px;line-height:1.7}
.ftr-btm{display:flex;justify-content:space-between;gap:16px;padding-top:22px;font-size:12.5px;color:#7C9FB6;flex-wrap:wrap}

/* ---------- lightbox ---------- */
.lb{position:fixed;inset:0;background:rgba(8,22,36,.94);z-index:200;display:none;align-items:center;justify-content:center;padding:28px}
.lb.open{display:flex}
.lb img{max-width:92vw;max-height:82vh;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lb .cap{position:absolute;bottom:22px;left:0;right:0;text-align:center;color:#BFD6E6;font-size:13px;letter-spacing:.6px}
.lb .x{position:absolute;top:18px;right:22px;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;border:0;font-size:22px;cursor:pointer;line-height:1}
.lb .nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;border:0;font-size:22px;cursor:pointer}
.lb .prev{left:18px}.lb .next{right:18px}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .grid4{grid-template-columns:repeat(2,1fr)}
  .scene-grid,.gal,.fac-grid{grid-template-columns:repeat(3,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats div:nth-child(2){border-right:0}
  .stats div:nth-child(1),.stats div:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:860px){
  .nav{display:none}.burger{display:block}
  .hero{grid-template-columns:1fr;min-height:0}
  .hero-l{padding:52px 24px;max-width:100%}
  .hero h1{font-size:36px}
  .hero-r{height:260px}
  .sec{padding:60px 0}
  .sec-h h2{font-size:26px}
  .about-grid,.contact-grid,.dl{grid-template-columns:1fr;gap:28px}
  .ftr-top{grid-template-columns:1fr 1fr;gap:24px}
}
@media (max-width:600px){
  .grid4,.scene-grid,.gal,.fac-grid{grid-template-columns:repeat(2,1fr)}
  .dl-card{flex-direction:column;align-items:flex-start}
  .dl-card .cv{width:104px}
  .stats{grid-template-columns:1fr}
  .stats div{border-right:0;border-bottom:1px solid var(--line)}
  .band h2{font-size:24px}
  .ftr-top{grid-template-columns:1fr}
}

@media (max-width:600px){
  .hdr-in{gap:10px}
  .brand img{height:28px}
  .brand .bt{font-size:14px;letter-spacing:1.6px}
  .brand .bt small{display:none}
  .hdr-r{gap:8px}
  .lang button{padding:5px 9px}
  .hdr-r .btn.wa{padding:7px 11px;font-size:12.5px}
  .hero-meta{gap:22px}
  .sec-h p{font-size:15px}
}
@media (max-width:420px){
  .brand .bt{display:none}
}

@media (max-width:860px){
  .hero-l{padding:46px 22px}
  .wrap{padding:0 22px}
  .hero p{font-size:15.5px}
}
@media (max-width:520px){
  .hero h1{font-size:30px;line-height:1.2;overflow-wrap:break-word}
  .hero-l{padding:40px 20px}
}