:root{
  --bg:#f6f8fb;--bg-2:#eef2f8;--bg-3:#e6ecf4;
  --card:rgba(255,255,255,.72);--card-hover:rgba(255,255,255,.98);
  --line:rgba(15,23,42,.10);--line-strong:rgba(2,132,199,.45);
  --text:#0f172a;--text-2:#46566b;--text-3:#7b8ca1;
  --primary:#0284c7;--primary-2:#0ea5e9;--cyan:#0891b2;--accent:#6366f1;
  --grad:linear-gradient(120deg,#0369a1,#22d3ee);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --radius:16px;--maxw:1200px;--nav-h:72px;--shadow:0 22px 50px -24px rgba(15,23,42,.28);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 12px)}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}ul{list-style:none}img{max-width:100%;display:block}button{font-family:inherit;cursor:pointer}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* 鼠标光标光晕 */
#cursor-glow{position:fixed;left:0;top:0;width:380px;height:380px;pointer-events:none;z-index:5;border-radius:50%;transform:translate(-50%,-50%);background:radial-gradient(circle,rgba(14,165,233,.30),rgba(56,189,248,.14) 45%,transparent 70%);mix-blend-mode:multiply;opacity:0;transition:opacity .3s}
#cursor-glow.show{opacity:1}

/* Navigation */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;background:rgba(255,255,255,.62);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid transparent;transition:background .3s,border-color .3s,box-shadow .3s}
.nav.scrolled{background:rgba(255,255,255,.92);border-color:var(--line);box-shadow:0 10px 30px -18px rgba(15,23,42,.2)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;overflow:hidden}
.logo-mark img{width:100%;height:100%;object-fit:contain;display:block}
.logo-text{font-weight:700;font-size:20px;letter-spacing:.5px}
.logo-sub{font-size:10px;color:var(--text-2);letter-spacing:2px;margin-top:2px}
.logo-en{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:10px 14px;font-size:15px;color:var(--text-2);transition:color .2s;border-radius:8px;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-links a.active::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:6px;width:18px;height:2px;border-radius:2px;background:var(--grad)}
.nav-cta{margin-left:8px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-size:15px;font-weight:600;border:none;transition:transform .18s ease,box-shadow .18s ease,background .18s ease;white-space:nowrap}
.btn-primary{background:linear-gradient(120deg,#0369a1,#0ea5e9);color:#fff;box-shadow:0 8px 24px -8px rgba(2,132,199,.55)}
.btn-primary:hover{filter:brightness(1.04);transform:translateY(-2px);box-shadow:0 16px 34px -10px rgba(2,132,199,.65)}
.btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line-strong)}
.btn-ghost:hover{border-color:var(--primary);background:rgba(2,132,199,.06);transform:translateY(-2px)}
.btn-lg{padding:15px 30px;font-size:16px;border-radius:12px}
.btn svg{width:16px;height:16px}
.btn-arrow svg{transition:transform .2s}
.btn-arrow:hover svg{transform:translateX(3px)}
.menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:8px;width:42px;height:42px;place-items:center;color:var(--text)}
.menu-toggle svg{width:20px;height:20px}
.mobile-menu{position:fixed;top:var(--nav-h);left:0;right:0;background:rgba(248,250,253,.98);border-bottom:1px solid var(--line);padding:12px 24px 20px;display:none;z-index:99}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 14px;font-size:16px;color:var(--text);border-radius:8px}
.mobile-menu a.active{color:var(--primary)}
.mobile-menu .btn{width:100%;justify-content:center;margin-top:8px}

/* Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:calc(var(--nav-h) + 40px) 0 60px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-bg .glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.75}
.hero-bg .glow-1{width:560px;height:560px;background:radial-gradient(circle,rgba(14,165,233,.5),transparent 65%);top:-120px;right:4%}
.hero-bg .glow-2{width:460px;height:460px;background:radial-gradient(circle,rgba(99,102,241,.38),transparent 65%);bottom:-140px;left:-40px}
.hero-bg .grid{position:absolute;inset:0;background-image:linear-gradient(rgba(2,132,199,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(2,132,199,.08) 1px,transparent 1px);background-size:60px 60px;-webkit-mask-image:radial-gradient(ellipse at center,black 15%,transparent 72%);mask-image:radial-gradient(ellipse at center,black 15%,transparent 72%)}
#network-canvas{position:absolute;inset:0;width:100%;height:100%}
.hero-inner{position:relative;z-index:3;max-width:860px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border-radius:999px;border:1px solid var(--line-strong);color:var(--primary);font-size:13px;letter-spacing:2px;background:rgba(2,132,199,.07);margin-bottom:26px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.hero h1{font-size:clamp(34px,6vw,62px);line-height:1.16;font-weight:800;letter-spacing:.5px;margin-bottom:24px}
.hero h1 .grad-text{background:linear-gradient(110deg,#0369a1,#0891b2 45%,#6366f1);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(16px,2vw,19px);color:var(--text-2);max-width:620px;margin-bottom:36px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:flex;flex-wrap:wrap;gap:42px;margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
.stat .num{font-size:30px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums}
.stat .lbl{font-size:13px;color:var(--text-3);margin-top:4px}
.stat .ref{font-size:11px;color:var(--text-3)}

/* Section shell */
.section{padding:96px 0;position:relative}
.section-alt{background:var(--bg-2)}
.section-head{max-width:780px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-tagline{color:var(--primary);font-size:13px;letter-spacing:2px;margin-bottom:12px;display:flex;align-items:center;gap:10px;text-transform:uppercase;font-weight:600}
.section-head.center .section-tagline{justify-content:center}
.section-tagline::before{content:"";width:26px;height:2px;background:var(--grad);border-radius:2px}
.section-head.center .section-tagline::after{content:"";width:26px;height:2px;background:var(--grad);border-radius:2px}
.section-title{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:.5px;line-height:1.25}
.section-desc{color:var(--text-2);font-size:16px;margin-top:16px}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.reveal.visible{opacity:1;transform:none}

/* Cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:box-shadow .3s,border-color .3s,background .3s;position:relative;overflow:hidden;will-change:transform}
.card:hover{border-color:var(--line-strong);background:var(--card-hover);box-shadow:var(--shadow)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .35s}
.card:hover::before{transform:scaleX(1)}
.card.tilting{transform-style:preserve-3d}
.icon-block{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(2,132,199,.12),rgba(99,102,241,.10));border:1px solid rgba(2,132,199,.28);color:var(--primary);margin-bottom:22px}
.icon-block svg{width:26px;height:26px}
.card h3{font-size:20px;font-weight:700;margin-bottom:12px}
.card p{color:var(--text-2);font-size:15px}

.grid-cap{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-prod{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-sol{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-app{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

.prod-specs{margin-top:18px;border-top:1px solid var(--line);padding-top:16px;display:grid;gap:8px}
.prod-specs div{display:flex;justify-content:space-between;font-size:13px;color:var(--text-3)}
.prod-specs strong{color:var(--text);font-weight:600}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{font-size:12px;color:var(--cyan);border:1px solid rgba(8,145,178,.35);background:rgba(8,145,178,.08);padding:3px 10px;border-radius:999px;font-weight:600}

.sol-card{display:flex;flex-direction:column}
.sol-num{font-size:12px;color:var(--primary);letter-spacing:2px;margin-bottom:auto;font-weight:700}
.sol-card .icon-block{margin-bottom:18px}
.sol-card h3{margin-bottom:10px}

/* architecture */
.arch{background:linear-gradient(180deg,transparent,#e9eff7 45%,#dee8f5 100%);border:1px solid var(--line);border-radius:22px;padding:48px 32px;position:relative;overflow:hidden}
.arch-bg{position:absolute;inset:0;background-image:radial-gradient(rgba(2,132,199,.35) 1px,transparent 1.4px);background-size:32px 32px;-webkit-mask-image:radial-gradient(ellipse at center,black,transparent 80%);mask-image:radial-gradient(ellipse at center,black,transparent 80%);opacity:.6}
.arch-flow{position:relative;display:flex;align-items:stretch;justify-content:space-between;gap:12px;flex-wrap:wrap}
.arch-node{flex:1 1 150px;background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:14px;padding:20px 18px;text-align:center;transition:box-shadow .3s,border-color .3s;min-width:130px;will-change:transform}
.arch-node:hover{border-color:var(--primary);box-shadow:0 14px 30px -16px rgba(2,132,199,.5)}
.arch-icon{width:46px;height:46px;margin:0 auto 14px;border-radius:12px;background:rgba(2,132,199,.1);border:1px solid rgba(2,132,199,.28);display:grid;place-items:center;color:var(--primary)}
.arch-icon svg{width:24px;height:24px}
.arch-node h4{font-size:15px;font-weight:700;margin-bottom:6px}
.arch-node p{font-size:12px;color:var(--text-3)}
.arch-arrow{display:grid;place-items:center;color:var(--cyan);flex:0 0 40px}
.arch-arrow svg{width:28px;height:28px;opacity:.85}
.arch-foot{position:relative;text-align:center;margin-top:36px;color:var(--text-3);font-size:14px}
.arch-foot b{color:var(--text);font-weight:600}

/* computing centers */
.map-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:44px;align-items:center}
.map-visual{position:relative;height:440px;border:1px solid var(--line);border-radius:22px;background:radial-gradient(circle at 30% 30%,rgba(14,165,233,.16),transparent 55%),radial-gradient(circle at 70% 70%,rgba(99,102,241,.12),transparent 50%),var(--bg-2);overflow:hidden;display:grid;place-items:center}
.map-visual svg{width:100%;height:100%}
.center-list{display:grid;gap:16px}
.center-item{display:flex;gap:18px;padding:22px;border-radius:14px;background:var(--card);border:1px solid var(--line);align-items:flex-start;transition:box-shadow .25s,border-color .25s,transform .25s;will-change:transform}
.center-item:hover{border-color:var(--line-strong);box-shadow:0 14px 30px -18px rgba(2,132,199,.4)}
.center-item .icon-block{margin-bottom:0;flex-shrink:0}
.center-item h4{font-size:17px;font-weight:700;margin-bottom:6px}
.center-item p{font-size:14px;color:var(--text-2)}
.center-item .city{font-size:12px;color:var(--primary);letter-spacing:1px;margin-bottom:8px;font-weight:700}
.center-item .stats{display:flex;gap:18px;margin-top:10px;font-size:13px;color:var(--text-3)}

/* advantages */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-metric{text-align:center;padding:34px 20px;border-radius:16px;background:var(--card);border:1px solid var(--line);transition:box-shadow .25s,border-color .25s,transform .15s ease-out;will-change:transform}
.adv-metric:hover{border-color:var(--line-strong);box-shadow:0 16px 34px -18px rgba(2,132,199,.45)}
.adv-metric .value{font-size:34px;font-weight:800;background:linear-gradient(120deg,#0369a1,#0ea5e9);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.adv-metric .label{font-size:14px;color:var(--text-2);margin-top:10px;font-weight:600}
.adv-metric .note{font-size:12px;color:var(--text-3);margin-top:6px}
.adv-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}

/* application scenarios */
.app-card{text-align:center;padding:30px 16px}
.app-card .icon-block{margin:0 auto 16px}
.app-card h4{font-size:16px;font-weight:700;margin-bottom:6px}
.app-card p{font-size:13px;color:var(--text-3)}

/* CTA banner */
.cta-banner{position:relative;overflow:hidden;text-align:center;border-radius:24px;border:1px solid var(--line-strong);background:linear-gradient(135deg,#eaf2fb,#e3ecf8 60%,#eaf2fb),radial-gradient(circle at 50% 0%,rgba(14,165,233,.16),transparent 70%);padding:72px 40px}
.cta-banner h2{font-size:clamp(26px,4vw,40px);font-weight:800;margin-bottom:18px}
.cta-banner p{color:var(--text-2);font-size:17px;max-width:620px;margin:0 auto 34px}
.cta-banner .cta-row{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.cta-banner::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(2,132,199,.14) 1px,transparent 1.4px);background-size:26px 26px;opacity:.5}
.cta-banner>*{position:relative}

/* Footer */
.footer{background:var(--bg-2);border-top:1px solid var(--line);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:var(--text-3);font-size:14px;max-width:300px}
.footer-col h5{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text)}
.footer-col a{display:block;color:var(--text-3);font-size:14px;padding:6px 0;transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--text-3);font-size:13px}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--primary)}

/* Page hero */
.page-hero{padding:calc(var(--nav-h) + 68px) 0 0;position:relative}
.page-hero.inner{padding-bottom:0}
.breadcrumb{color:var(--text-3);font-size:14px;margin-bottom:14px}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--primary)}

/* about */
.about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center}
.about-heading h1{font-size:clamp(30px,4vw,46px);line-height:1.2;font-weight:800;margin-bottom:22px}
.about-heading p{color:var(--text-2);font-size:16px}
.about-heading p+p{margin-top:12px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{font-size:13px;color:var(--cyan);border:1px solid rgba(8,145,178,.35);background:rgba(8,145,178,.07);padding:8px 16px;border-radius:999px;font-weight:600}
.about-panel{position:relative;border:1px solid var(--line);border-radius:22px;padding:36px;background:var(--card)}
.about-panel h3{font-size:22px;font-weight:700;margin-bottom:28px}
.timeline{position:relative;display:grid;gap:26px}
.timeline::before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:1px;background:var(--line)}
.tl-item{position:relative;padding-left:40px}
.tl-item::before{content:"";position:absolute;left:4px;top:8px;width:13px;height:13px;border-radius:50%;background:var(--bg);border:2px solid var(--primary);box-shadow:0 0 0 3px rgba(2,132,199,.12)}
.tl-item h4{font-size:16px;font-weight:700}
.tl-item .tl-region{color:var(--primary);font-size:12px;letter-spacing:1px;font-weight:700}
.tl-item p{color:var(--text-3);font-size:13px;margin-top:6px}
.values-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.about-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;align-items:start}
.contact-info h1{font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.2;margin-bottom:20px}
.contact-info>p{color:var(--text-2);font-size:16px;margin-bottom:30px}
.contact-cards{display:grid;gap:16px}
.contact-card{display:flex;gap:16px;padding:20px 22px;border-radius:14px;background:var(--card);border:1px solid var(--line);align-items:center;transition:box-shadow .25s,border-color .25s,transform .12s ease-out;will-change:transform}
.contact-card:hover{border-color:var(--primary);box-shadow:0 14px 30px -18px rgba(2,132,199,.4)}
.contact-card .icon-block{margin-bottom:0}
.contact-card h4{font-size:16px;font-weight:700;margin-bottom:4px}
.contact-card p{color:var(--text-3);font-size:14px}
.contact-card a{color:var(--primary)}
.form-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:40px}
.form-card h3{font-size:22px;font-weight:700;margin-bottom:8px}
.form-card>p{color:var(--text-3);font-size:14px;margin-bottom:28px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-group{display:flex;flex-direction:column;gap:8px}
.form-group.full{grid-column:1 / -1}
.form-group label{font-size:13px;color:var(--text-2);font-weight:600}
.form-group input,.form-group select,.form-group textarea{background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px 14px;color:var(--text);font-size:15px;font-family:inherit;transition:border-color .2s,box-shadow .2s;width:100%}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(2,132,199,.12)}
.form-group select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2346566b' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.form-group textarea{resize:vertical;min-height:100px}
.form-submit{width:100%;justify-content:center;margin-top:26px}
.form-msg{display:none;margin-top:16px;padding:14px;border-radius:10px;font-size:14px;text-align:center}
.form-msg.ok{display:block;background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.5);color:#047857}
.form-msg.err{display:block;background:rgba(244,63,94,.12);border:1px solid rgba(244,63,94,.5);color:#be123c}

/* Responsive */
@media (max-width:1024px){
  .grid-cap,.grid-prod,.grid-sol,.values-grid,.about-metrics{grid-template-columns:repeat(2,1fr)}
  .grid-app{grid-template-columns:repeat(3,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .adv-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .about-grid,.contact-grid,.map-wrap{grid-template-columns:1fr;gap:40px}
}
@media (max-width:768px){
  .nav-links{display:none}
  .nav .btn-desktop{display:none}
  .menu-toggle{display:grid}
  .section{padding:68px 0}
  .grid-cap,.grid-prod,.grid-sol,.values-grid,.adv-cards,.about-metrics{grid-template-columns:1fr}
  .grid-app{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:1fr}
  .hero-stats{gap:28px}
  .form-grid{grid-template-columns:1fr}
  .cta-banner{padding:52px 24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .map-visual{height:300px}
}
@media (max-width:480px){
  .grid-app{grid-template-columns:1fr}
  .hero{min-height:auto}
  .container{padding:0 20px}
  .logo-mark{width:34px;height:34px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  #cursor-glow{display:none}
}

/* 3D 倾斜过渡 */
.tilting{transition:transform .14s ease-out}