:root{
  --bg:#0b1020;
  --bg-alt:#0e1530;
  --surface:#121a36;
  --surface-2:#16204a;
  --text:#e8ecf8;
  --muted:#9aa6c8;
  --primary:#5b8cff;
  --primary-2:#36e0c8;
  --accent:#8a6bff;
  --line:rgba(255,255,255,.08);
  --radius:16px;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.18em;color:var(--primary-2);font-weight:600;margin-bottom:14px}
h1,h2,h3{line-height:1.25;font-weight:700}
p{color:var(--muted)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.25s}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 10px 30px -10px rgba(91,140,255,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -12px rgba(91,140,255,.85)}
.btn-ghost{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--primary);color:#fff}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(11,16,32,.72);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:700}
.brand-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-weight:800;font-size:20px;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-2))}
.brand-text{display:flex;flex-direction:column;line-height:1.1;font-size:16px}
.brand-text small{font-size:11px;color:var(--muted);font-weight:500;letter-spacing:.05em}
.nav-links{display:flex;align-items:center;gap:28px;font-size:15px}
.nav-links a{color:var(--muted);transition:.2s}
.nav-links a:hover{color:#fff}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}

/* Hero */
.hero{position:relative;overflow:hidden;padding:90px 0 70px}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(60% 60% at 80% 10%,rgba(91,140,255,.25),transparent 60%),
  radial-gradient(50% 50% at 10% 90%,rgba(54,224,200,.18),transparent 60%),
  linear-gradient(180deg,var(--bg),var(--bg-alt))}
.hero-inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero-copy h1{font-size:clamp(34px,5vw,58px);margin:6px 0 18px;background:linear-gradient(180deg,#fff,#c5d2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:18px;max-width:560px;color:var(--muted)}
.hero-actions{display:flex;gap:14px;margin:28px 0 36px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;max-width:560px}
.hero-stats div{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:14px;padding:14px}
.hero-stats strong{display:block;font-size:26px;color:#fff}
.hero-stats span{font-size:12px;color:var(--muted)}

/* Hero 视觉 */
.hero-visual{position:relative;height:340px}
.orb{position:absolute;border-radius:50%;filter:blur(2px);opacity:.9}
.orb-1{width:200px;height:200px;left:30px;top:20px;background:radial-gradient(circle at 30% 30%,var(--primary),transparent 70%);animation:float 7s ease-in-out infinite}
.orb-2{width:150px;height:150px;right:20px;top:60px;background:radial-gradient(circle at 30% 30%,var(--primary-2),transparent 70%);animation:float 9s ease-in-out infinite reverse}
.orb-3{width:120px;height:120px;left:90px;bottom:10px;background:radial-gradient(circle at 30% 30%,var(--accent),transparent 70%);animation:float 8s ease-in-out infinite}
.chip{position:absolute;background:rgba(18,26,54,.85);border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-size:13px;color:#fff;box-shadow:0 8px 24px -8px rgba(0,0,0,.6)}
.chip-a{left:0;top:0;animation:float 6s ease-in-out infinite}
.chip-b{right:0;top:130px;animation:float 7.5s ease-in-out infinite}
.chip-c{left:40px;bottom:40px;animation:float 6.8s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}

/* 通用 section */
.section{padding:84px 0}
.section-alt{background:linear-gradient(180deg,var(--bg-alt),var(--bg))}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head.left{text-align:left;margin:0 0 26px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:12px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:rgba(91,140,255,.5);box-shadow:0 18px 40px -20px rgba(91,140,255,.5)}

/* 关于 */
.about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:34px}
.about-card h3{color:var(--primary-2);margin-bottom:10px;font-size:19px}
.about-text p{margin-bottom:14px;font-size:16px}

/* 产品 */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prod-ico{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;font-size:24px;color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));margin-bottom:16px}
.prod-card h3{margin-bottom:8px;font-size:18px}
.prod-card p{font-size:15px}

/* 解决方案 */
.sol-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.sol-tag{display:inline-block;font-size:12px;letter-spacing:.05em;color:var(--primary-2);border:1px solid rgba(54,224,200,.4);border-radius:999px;padding:4px 12px;margin-bottom:14px}
.sol-card h3{font-size:18px;margin-bottom:8px}
.sol-card p{font-size:14px}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-date{font-size:13px;color:var(--primary-2);font-weight:600}
.news-card h3{font-size:18px;margin:8px 0 10px;color:#fff}
.news-card p{font-size:14px}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-list{list-style:none;margin-top:18px}
.contact-list li{padding:14px 0;border-bottom:1px solid var(--line);font-size:16px}
.contact-list span{display:inline-block;width:64px;color:var(--muted);font-size:14px;margin-right:14px}
.contact-form{display:flex;flex-direction:column;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:14px;color:var(--muted)}
.field input,.field textarea{background:var(--bg);border:1px solid var(--line);border-radius:11px;padding:12px 14px;color:var(--text);font-size:15px;font-family:inherit;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary)}
.form-note{font-size:12px;color:var(--muted);text-align:center;margin-top:2px}

/* 页脚 */
.footer{border-top:1px solid var(--line);background:var(--bg-alt);padding:48px 0 26px;margin-top:20px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;margin-bottom:26px}
.footer-brand{display:flex;align-items:center;gap:14px}
.footer-brand strong{display:block;font-size:16px}
.footer-brand small{color:var(--muted);font-size:12px}
.footer-links{display:flex;gap:24px;flex-wrap:wrap;font-size:14px}
.footer-links a{color:var(--muted);transition:.2s}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--muted)}
.footer-bottom a{color:var(--primary-2)}
.footer-bottom a:hover{text-decoration:underline}

/* 响应式 */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{height:260px;order:-1}
  .about-grid,.prod-grid,.news-grid{grid-template-columns:1fr 1fr}
  .sol-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav-links{position:absolute;top:68px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 0;display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 24px;width:100%}
  .nav-toggle{display:block}
  .hero-stats{grid-template-columns:1fr 1fr}
  .about-grid,.prod-grid,.news-grid,.sol-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
}