*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#2563EB;--primary-hover:#1D4ED8;--primary-gradient:linear-gradient(135deg,#2563EB,#7C3AED);
  --dark:#0F172A;--card-bg:#FFFFFF;--page-bg:#F8FAFC;
  --text:#1E293B;--text-secondary:#64748B;
  --success:#22C55E;--warning:#EAB308;--promo:#F97316;
  --radius:14px;--btn-radius:10px;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;color:var(--text);background:var(--page-bg);line-height:1.6;font-size:16px}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Navigation */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 0;transition:all .3s ease}
.navbar.scrolled{background:rgba(15,23,42,.92);backdrop-filter:blur(12px);box-shadow:0 2px 20px rgba(0,0,0,.15);padding:10px 0}
.navbar .container{display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:#fff}
.nav-logo img{width:36px;height:36px;border-radius:8px}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links a{color:rgba(255,255,255,.85);font-size:15px;transition:color .2s;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-cta{background:var(--primary);color:#fff!important;padding:8px 20px;border-radius:var(--btn-radius);transition:all .2s}
.nav-cta:hover{background:var(--primary-hover);transform:scale(1.02)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.hamburger span{width:24px;height:2px;background:#fff;transition:all .3s}
.mobile-menu{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,.98);z-index:999;flex-direction:column;align-items:center;justify-content:center;gap:24px}
.mobile-menu.active{display:flex}
.mobile-menu a{color:#fff;font-size:20px;font-weight:500}
.mobile-close{position:absolute;top:20px;right:20px;font-size:32px;color:#fff;cursor:pointer}

/* Hero */
.hero{min-height:100vh;background:var(--dark);position:relative;display:flex;align-items:center;overflow:hidden;padding-top:80px}
.hero-bg{position:absolute;inset:0;overflow:hidden}
.hero-bg canvas{width:100%;height:100%}
.hero .container{display:flex;align-items:center;gap:60px;position:relative;z-index:2}
.hero-content{flex:1;max-width:560px}
.hero-badge{display:inline-block;background:rgba(37,99,235,.15);border:1px solid rgba(37,99,235,.3);color:#60A5FA;padding:6px 16px;border-radius:20px;font-size:13px;font-weight:500;margin-bottom:20px}
.hero h1{font-size:52px;font-weight:700;color:#fff;line-height:1.2;margin-bottom:16px}
.hero h1 span{background:var(--primary-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:17px;color:rgba(255,255,255,.7);line-height:1.7;margin-bottom:24px}
.hero-tags{display:flex;gap:12px;margin-bottom:32px;flex-wrap:wrap}
.hero-tags span{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.8);padding:6px 14px;border-radius:8px;font-size:13px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{background:var(--primary);color:#fff;padding:14px 32px;border-radius:var(--btn-radius);font-size:16px;font-weight:600;border:none;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:8px}
.btn-primary:hover{background:var(--primary-hover);transform:scale(1.02)}
.btn-outline{background:transparent;color:#fff;padding:14px 32px;border-radius:var(--btn-radius);font-size:16px;font-weight:600;border:1px solid rgba(255,255,255,.3);cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:8px}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.05)}
.hero-visual{flex:1;max-width:520px}

/* Simulator */
.simulator{background:rgba(15,23,42,.8);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:24px;backdrop-filter:blur(10px)}
.sim-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.sim-title{color:#fff;font-size:14px;font-weight:600}
.sim-status{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--success)}
.sim-status .dot{width:8px;height:8px;background:var(--success);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.sim-map{background:rgba(255,255,255,.03);border-radius:12px;padding:20px;margin-bottom:16px;position:relative;height:200px;overflow:hidden}
.sim-map svg{width:100%;height:100%}
.sim-node{fill:var(--primary);opacity:.8}
.sim-line{stroke:var(--primary);stroke-width:1;opacity:.3;stroke-dasharray:4 4;animation:dash 20s linear infinite}
@keyframes dash{to{stroke-dashoffset:-100}}
.sim-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.sim-stat{background:rgba(255,255,255,.05);border-radius:10px;padding:12px;text-align:center}
.sim-stat-val{color:#fff;font-size:20px;font-weight:700}
.sim-stat-label{color:rgba(255,255,255,.5);font-size:11px;margin-top:2px}
.sim-connect-btn{width:100%;margin-top:16px;padding:14px;background:var(--primary-gradient);color:#fff;border:none;border-radius:var(--btn-radius);font-size:15px;font-weight:600;cursor:pointer;transition:all .2s}
.sim-connect-btn:hover{transform:scale(1.02);box-shadow:0 4px 20px rgba(37,99,235,.4)}

/* Trust */
.trust{padding:80px 0;background:#fff}
.trust-grid{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.trust-item{text-align:center;min-width:160px}
.trust-num{font-size:48px;font-weight:700;color:var(--primary);line-height:1}
.trust-label{font-size:14px;color:var(--text-secondary);margin-top:8px}

/* Section common */
.section{padding:100px 0}
.section-dark{background:var(--dark)}
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:36px;font-weight:700;margin-bottom:12px}
.section-title p{font-size:16px;color:var(--text-secondary);max-width:600px;margin:0 auto}
.section-dark .section-title h2{color:#fff}
.section-dark .section-title p{color:rgba(255,255,255,.6)}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--card-bg);border:1px solid #E2E8F0;border-radius:var(--radius);padding:32px;transition:all .3s}
.feature-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px rgba(0,0,0,.08);border-color:var(--primary)}
.feature-icon{width:48px;height:48px;background:rgba(37,99,235,.1);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:24px}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.6}

/* Tech diagram */
.tech-diagram{background:rgba(37,99,235,.03);border:1px solid rgba(37,99,235,.1);border-radius:var(--radius);padding:40px;margin-bottom:48px;display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.tech-step{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}
.tech-step-icon{width:56px;height:56px;background:var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px}
.tech-step span{font-size:12px;color:var(--text-secondary);max-width:80px}
.tech-arrow{color:var(--primary);font-size:20px;font-weight:700}

/* Nodes */
.nodes-tabs{display:flex;gap:12px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}
.nodes-tab{padding:8px 20px;border-radius:8px;background:rgba(255,255,255,.08);color:rgba(255,255,255,.7);cursor:pointer;transition:all .2s;border:1px solid rgba(255,255,255,.1);font-size:14px}
.nodes-tab.active,.nodes-tab:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.nodes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.node-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:16px;display:flex;align-items:center;gap:12px;transition:all .2s}
.node-card:hover{background:rgba(255,255,255,.08);border-color:rgba(37,99,235,.3)}
.node-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.node-dot.online{background:var(--success);box-shadow:0 0 8px rgba(34,197,94,.5)}
.node-dot.maintenance{background:var(--warning)}
.node-name{color:#fff;font-size:14px;font-weight:500}
.node-type{color:rgba(255,255,255,.5);font-size:12px}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.pricing-card{background:var(--card-bg);border:2px solid #E2E8F0;border-radius:var(--radius);padding:36px;text-align:center;transition:all .3s;position:relative}
.pricing-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px rgba(0,0,0,.08)}
.pricing-card.recommended{border-color:var(--primary);transform:scale(1.05)}
.pricing-card.recommended:hover{transform:scale(1.05) translateY(-8px)}
.pricing-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--primary-gradient);color:#fff;padding:4px 20px;border-radius:20px;font-size:13px;font-weight:600}
.pricing-name{font-size:20px;font-weight:600;margin-bottom:8px}
.pricing-price{font-size:42px;font-weight:700;color:var(--primary);margin:16px 0}
.pricing-price span{font-size:16px;color:var(--text-secondary);font-weight:400}
.pricing-features{list-style:none;margin:24px 0;text-align:left}
.pricing-features li{padding:8px 0;font-size:14px;color:var(--text-secondary);display:flex;align-items:center;gap:8px}
.pricing-features li::before{content:'\2713';color:var(--success);font-weight:700}
.pricing-btn{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:var(--btn-radius);font-size:15px;font-weight:600;cursor:pointer;transition:all .2s}
.pricing-btn:hover{background:var(--primary-hover);transform:scale(1.02)}
.pricing-extras{display:flex;justify-content:center;gap:32px;margin-top:48px;flex-wrap:wrap}
.pricing-extra{text-align:center}
.pricing-extra-icon{font-size:24px;margin-bottom:4px}
.pricing-extra-text{font-size:13px;color:var(--text-secondary)}
.payment-methods{display:flex;justify-content:center;gap:24px;margin-top:32px;align-items:center}
.payment-methods span{font-size:13px;color:var(--text-secondary);background:#F1F5F9;padding:6px 14px;border-radius:6px}

/* Testimonials */
.testimonials-wrapper{overflow:hidden;position:relative}
.testimonials-track{display:flex;gap:24px;transition:transform .5s ease}
.testimonial-card{min-width:calc(33.333% - 16px);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:28px;flex-shrink:0}
.testimonial-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.testimonial-avatar{width:44px;height:44px;border-radius:50%;background:var(--primary-gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}
.testimonial-name{color:#fff;font-weight:600;font-size:14px}
.testimonial-role{color:rgba(255,255,255,.5);font-size:12px}
.testimonial-text{color:rgba(255,255,255,.75);font-size:14px;line-height:1.7;font-style:italic}
.testimonial-source{color:rgba(255,255,255,.4);font-size:12px;margin-top:12px}
.testimonial-stars{color:#FBBF24;font-size:14px;margin-top:8px}
.testimonials-dots{display:flex;justify-content:center;gap:8px;margin-top:24px}
.testimonials-dots span{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.2);cursor:pointer;transition:all .2s}
.testimonials-dots span.active{background:var(--primary);width:24px;border-radius:4px}

/* News */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.news-col h3{font-size:20px;font-weight:600;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--primary);display:inline-block}
.news-item{padding:16px 0;border-bottom:1px solid #E2E8F0}
.news-date{font-size:12px;color:var(--primary);font-weight:500;margin-bottom:4px}
.news-item h4{font-size:15px;font-weight:500;margin-bottom:4px}
.news-item p{font-size:13px;color:var(--text-secondary)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid #E2E8F0;border-radius:12px;margin-bottom:12px;overflow:hidden;transition:all .3s}
.faq-item.active{border-color:var(--primary);box-shadow:0 4px 20px rgba(37,99,235,.08)}
.faq-question{padding:20px 24px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-weight:500;font-size:15px;transition:all .2s}
.faq-question:hover{color:var(--primary)}
.faq-arrow{transition:transform .3s;font-size:12px;color:var(--text-secondary)}
.faq-item.active .faq-arrow{transform:rotate(180deg);color:var(--primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-answer-inner{padding:0 24px 20px;font-size:14px;color:var(--text-secondary);line-height:1.8}
.faq-answer-inner ol,.faq-answer-inner ul{padding-left:20px;margin:8px 0}
.faq-answer-inner li{margin-bottom:4px}

/* CTA */
.cta-section{background:var(--primary-gradient);padding:80px 0;text-align:center}
.cta-section h2{font-size:36px;font-weight:700;color:#fff;margin-bottom:12px}
.cta-section p{font-size:16px;color:rgba(255,255,255,.8);margin-bottom:32px}
.cta-section .btn-primary{background:#fff;color:var(--primary);font-size:18px;padding:16px 40px}
.cta-section .btn-primary:hover{background:rgba(255,255,255,.9)}

/* Footer */
.footer{background:var(--dark);padding:60px 0 0;color:rgba(255,255,255,.7)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1.5fr;gap:40px;margin-bottom:40px}
.footer-brand p{font-size:14px;line-height:1.7;margin-top:12px}
.footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer ul{list-style:none}
.footer ul li{margin-bottom:8px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.6);transition:color .2s}
.footer ul a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}
.friend-links{padding:16px 0;border-top:1px solid rgba(255,255,255,.06);text-align:center;font-size:13px;color:rgba(255,255,255,.35)}
.friend-links a{color:rgba(255,255,255,.5);margin:0 6px;transition:color .2s}
.friend-links a:hover{color:#fff}

/* Animations */
.fade-up{opacity:0;transform:translateY(30px);transition:all .6s ease-out}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* Download page */
.download-hero{padding:140px 0 80px;background:var(--dark);text-align:center}
.download-hero h1{font-size:42px;color:#fff;font-weight:700;margin-bottom:12px}
.download-hero p{color:rgba(255,255,255,.7);font-size:17px}
.download-section{padding:80px 0}
.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;max-width:900px;margin:0 auto}
.download-card{background:#fff;border:2px solid #E2E8F0;border-radius:var(--radius);padding:36px;text-align:center;transition:all .3s}
.download-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.08)}
.download-card-icon{font-size:48px;margin-bottom:16px}
.download-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.download-card p{font-size:14px;color:var(--text-secondary);margin-bottom:20px}
.download-card .btn-primary{width:100%;justify-content:center}

/* Subpage hero */
.subpage-hero{padding:140px 0 60px;background:var(--dark);text-align:center}
.subpage-hero h1{font-size:42px;color:#fff;font-weight:700;margin-bottom:12px}
.subpage-hero p{color:rgba(255,255,255,.7);font-size:17px;max-width:600px;margin:0 auto}

/* Sitemap */
.sitemap-section{padding:60px 0}
.sitemap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px}
.sitemap-col h3{font-size:18px;font-weight:600;margin-bottom:16px;color:var(--primary)}
.sitemap-col ul{list-style:none}
.sitemap-col li{margin-bottom:8px}
.sitemap-col a{color:var(--text-secondary);font-size:14px;transition:color .2s}
.sitemap-col a:hover{color:var(--primary)}

/* Responsive */
@media(max-width:1024px){
  .hero .container{flex-direction:column;text-align:center}
  .hero-content{max-width:100%}
  .hero-tags{justify-content:center}
  .hero-btns{justify-content:center}
  .hero-visual{max-width:100%}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .pricing-grid{grid-template-columns:repeat(2,1fr)}
  .pricing-card.recommended{transform:scale(1)}
  .testimonial-card{min-width:calc(50% - 12px)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-links{display:none}
  .hamburger{display:flex}
  .hero h1{font-size:32px}
  .section-title h2{font-size:28px}
  .features-grid{grid-template-columns:1fr}
  .pricing-grid{grid-template-columns:1fr}
  .trust-grid{gap:24px}
  .trust-num{font-size:36px}
  .testimonial-card{min-width:100%}
  .footer-grid{grid-template-columns:1fr}
  .tech-diagram{flex-direction:column}
  .tech-arrow{transform:rotate(90deg)}
  .sim-stats{grid-template-columns:repeat(3,1fr)}
  .download-grid{grid-template-columns:1fr}
  .cta-section h2{font-size:28px}
}