:root{
  --navy:#050d1c; --navy2:#0a1b33; --blue:#1a6fe8; --cyan:#22d3ee; --gold:#b8912f;
  --ink:#101a29; --grey:#5b6b80; --line:#e2e8f2; --bg:#f5f8fd; --card:#ffffff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.68 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}

/* 顶栏 */
.top{background:var(--navy);color:#9fb6d4;font-size:13px;letter-spacing:.2px}
.top .wrap{display:flex;justify-content:space-between;gap:12px;padding:9px 24px;flex-wrap:wrap}
.top a{color:#dbe8f7}
.top a:hover{color:var(--cyan)}

/* 头部 */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:52px;width:auto}
.menu{display:flex;gap:26px;font-size:15px;font-weight:600;color:#22314a}
.menu a{position:relative;padding:6px 0}
.menu a:hover{color:var(--blue)}
.menu a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--cyan);transition:.25s}
.menu a:hover::after{width:100%}
.btn{display:inline-block;background:linear-gradient(135deg,var(--blue),#0f57c4);color:#fff;padding:12px 24px;border-radius:8px;font-weight:700;box-shadow:0 6px 18px rgba(26,111,232,.25);transition:.2s}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(26,111,232,.35)}
.btn.ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.35);box-shadow:none;backdrop-filter:blur(6px)}
.btn.ghost:hover{background:rgba(255,255,255,.16)}

/* 首屏 */
.hero{position:relative;overflow:hidden;color:#fff;padding:96px 0 88px;background:
  radial-gradient(1100px 520px at 78% 8%,rgba(34,211,238,.18),transparent 60%),
  radial-gradient(900px 480px at 12% 92%,rgba(26,111,232,.22),transparent 62%),
  linear-gradient(150deg,#050d1c 0%,#0a1b33 46%,#0d2a52 100%)}
.hero::before{content:"";position:absolute;inset:0;opacity:.28;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.10) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(circle at 50% 40%,#000 40%,transparent 78%)}
.hero .wrap{position:relative;z-index:2}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:1.6px;text-transform:uppercase;color:var(--cyan);font-weight:700;margin-bottom:18px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--cyan);display:inline-block}
.hero h1{font-size:52px;line-height:1.16;margin:0 0 18px;letter-spacing:-.6px;max-width:900px}
.hero h1 span{background:linear-gradient(90deg,#61e6f7,#4f9bff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:18px;color:#c5d6ea;max-width:760px;margin:0}
.hero .btns{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px;border-top:1px solid rgba(255,255,255,.14);padding-top:26px}
.stats b{display:block;font-size:30px;letter-spacing:-.5px;color:#fff}
.stats span{font-size:13px;color:#9fb6d4}

/* 通用区块 */
section{padding:74px 0}
.sec-head{max-width:760px;margin-bottom:34px}
h2.sec{font-size:34px;letter-spacing:-.4px;margin:0 0 10px}
.sub{color:var(--grey);margin:0;font-size:16.5px}
.grid{display:grid;gap:22px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}

/* 卡片 */
.card{position:relative;border:1px solid var(--line);border-radius:14px;padding:26px 24px;background:var(--card);transition:.25s;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,var(--blue),var(--cyan));opacity:0;transition:.25s}
.card:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(9,30,66,.10);border-color:#cfe0f7}
.card:hover::before{opacity:1}
.card h3{margin:0 0 8px;font-size:17.5px;letter-spacing:-.2px}
.card p{margin:0;color:var(--grey);font-size:14.5px}

/* 产品卡 */
.pcard{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;display:flex;flex-direction:column;transition:.25s}
.pcard:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(9,30,66,.10);border-color:#cfe0f7}
.pcard .ph{aspect-ratio:4/3;background:linear-gradient(180deg,#f7fafd,#eef4fb);display:flex;align-items:center;justify-content:center;overflow:hidden}
.pcard .ph img{width:100%;height:100%;object-fit:contain;padding:14px;transition:.35s}
.pcard:hover .ph img{transform:scale(1.05)}
.pcard .bd{padding:15px 17px 18px;font-size:14.5px;font-weight:650;line-height:1.45;color:#1a2740}

/* CTA */
.cta{position:relative;overflow:hidden;color:#fff;text-align:center;background:
  radial-gradient(700px 300px at 50% -20%,rgba(34,211,238,.25),transparent 70%),linear-gradient(135deg,#050d1c,#0d2a52)}
.cta h2{font-size:34px;margin:0 0 12px;letter-spacing:-.4px}
.cta p{color:#bcd0e6}

/* 页脚 */
footer{background:#040b17;color:#8fa6c2;font-size:14px;padding:56px 0 26px}
footer a:hover{color:#fff}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:30px}
footer h4{color:#fff;font-size:14px;letter-spacing:1px;text-transform:uppercase;margin:0 0 14px}
footer p{margin:7px 0}
.copy{border-top:1px solid #142b47;margin-top:34px;padding-top:18px;color:#6f88a6;font-size:13px}

/* 内页 */
.crumb{font-size:13px;color:var(--grey);padding:18px 0}
.crumb a{color:var(--blue)}
.prod{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:start}
.prod img{border:1px solid var(--line);border-radius:16px;padding:22px;background:linear-gradient(180deg,#fbfdff,#eef4fb);width:100%}
.spec{width:100%;border-collapse:collapse;font-size:14.5px;margin:20px 0;border-radius:10px;overflow:hidden}
.spec th,.spec td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.spec th{background:#f2f7fd;width:36%;font-weight:650}
.form{display:grid;gap:13px;max-width:600px}
.form input,.form textarea{border:1px solid var(--line);border-radius:9px;padding:13px;font:inherit;background:#fbfdff}
.form input:focus,.form textarea:focus{outline:2px solid rgba(26,111,232,.25);border-color:var(--blue)}
.form button{background:linear-gradient(135deg,var(--blue),#0f57c4);color:#fff;border:0;border-radius:9px;padding:14px;font-weight:750;font-size:16px;cursor:pointer}

/* 语言切换 */
.lang{position:relative;font-size:14px}
.lang select{border:1px solid var(--line);border-radius:8px;padding:8px 10px;background:#fff;font:inherit;color:#22314a;cursor:pointer}

@media(max-width:980px){
  .g4,.g3{grid-template-columns:repeat(2,1fr)}
  .prod{grid-template-columns:1fr}
  .hero h1{font-size:38px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .fgrid{grid-template-columns:1fr 1fr}
  .menu{display:none}
}
@media(max-width:560px){
  .g4,.g3{grid-template-columns:1fr}
  .hero{padding:66px 0 58px}
  .hero h1{font-size:30px}
  .brand img{height:42px}
}

/* ===== 科技感首屏 v2 ===== */
.hero{padding:78px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center;position:relative;z-index:2}
.hero h1{font-size:48px}
.hero .stats{margin-top:38px;grid-template-columns:repeat(4,1fr);gap:14px}
.hero .stats b{font-size:26px}
.hero .stats span{font-size:12.5px}

.hero-visual{position:relative;min-height:460px;display:flex;align-items:center;justify-content:center}
.ring{position:absolute;border-radius:50%;border:1px solid rgba(90,160,255,.22)}
.ring.r1{width:420px;height:420px;animation:pulse 6s ease-in-out infinite}
.ring.r2{width:320px;height:320px;border-color:rgba(34,211,238,.28);animation:pulse 6s ease-in-out infinite .8s}
.ring.r3{width:540px;height:540px;border-color:rgba(90,160,255,.10)}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.85}50%{transform:scale(1.06);opacity:.45}}
.glow{position:absolute;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.20),rgba(26,111,232,.14) 45%,transparent 70%);filter:blur(18px);animation:glowpulse 7s ease-in-out infinite}
@keyframes glowpulse{0%,100%{opacity:.75}50%{opacity:1}}

.showcase{position:relative;width:100%;max-width:400px;border-radius:20px;padding:18px;background:linear-gradient(160deg,rgba(255,255,255,.14),rgba(255,255,255,.06));border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(10px);box-shadow:0 40px 80px rgba(0,0,0,.45);animation:float 7s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.showcase img{width:100%;border-radius:12px;background:#fff;padding:10px}
.showcase .cap{margin-top:12px;display:flex;justify-content:space-between;align-items:center;color:#cfe4ff;font-size:13px}
.chip{position:absolute;background:rgba(6,18,36,.85);border:1px solid rgba(90,190,255,.35);color:#d7ecff;font-size:12.5px;padding:9px 14px;border-radius:999px;backdrop-filter:blur(8px);box-shadow:0 8px 24px rgba(0,0,0,.35);white-space:nowrap}
.chip.c1{top:26px;left:-18px;animation:float 6s ease-in-out infinite .5s}
.chip.c2{bottom:52px;right:-14px;animation:float 6.5s ease-in-out infinite 1.2s}
.chip.c3{bottom:-8px;left:24px;animation:float 7.5s ease-in-out infinite .9s}

.scanline{position:absolute;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(34,211,238,.65),transparent);animation:scan 7s linear infinite;opacity:.7}
@keyframes scan{0%{top:12%}100%{top:88%}}

.brandbar{padding:26px 0 6px;border-top:1px solid var(--line);background:#fff}
.brandbar .wrap{display:flex;align-items:center;gap:26px;flex-wrap:wrap;justify-content:space-between}
.brandbar span.t{font-size:12px;letter-spacing:1.6px;text-transform:uppercase;color:#8a99ad;font-weight:700}
.brandbar img{height:26px;width:auto;opacity:.62;filter:grayscale(1);transition:.25s}
.brandbar img:hover{opacity:1;filter:none}

@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .hero-visual{min-height:340px;order:-1}
  .ring.r1{width:300px;height:300px}.ring.r2{width:230px;height:230px}.ring.r3{width:380px;height:380px}
  .glow{width:320px;height:320px}
  .showcase{max-width:320px}
  .chip.c1{left:0}.chip.c2{right:0}
}

/* WhatsApp 悬浮按钮 */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:99;width:56px;height:56px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(37,211,102,.45);transition:.2s}
.wa-float:hover{transform:scale(1.07);box-shadow:0 14px 32px rgba(37,211,102,.55)}
.wa-float svg{width:30px;height:30px;fill:#fff}
.wa-top{color:#8ff0b5 !important;font-weight:600}
@media(max-width:560px){.wa-float{width:50px;height:50px;right:14px;bottom:14px}.wa-float svg{width:26px;height:26px}}