:root{--bg:#020d10;--surface:#061a1e;--surface2:#0c2a30;--border:#163640;--cyan:#22d3ee;--cyan-dark:#0891b2;--cyan-glow:rgba(34,211,238,.16);--text:#e0f8ff;--muted:#5a9aab;--radius:12px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%}
.container{max-width:1140px;margin:0 auto;padding:0 24px}

/* Nav */
nav{position:sticky;top:0;z-index:100;background:rgba(2,13,16,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700}
.logo em{color:var(--cyan);font-style:normal}
.logo-icon{width:34px;height:34px;background:var(--cyan-glow);border:1px solid var(--cyan-dark);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.1rem}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:6px 14px;border-radius:8px;font-size:0.9rem;color:var(--muted);transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--surface)}
.btn{padding:9px 22px;border-radius:9px;font-size:0.9rem;font-weight:600;cursor:pointer;border:none;transition:.2s;display:inline-flex;align-items:center;gap:6px}
.btn-primary{background:var(--cyan-dark);color:#fff}
.btn-primary:hover{background:var(--cyan);color:#000}
.btn-outline{background:transparent;color:var(--cyan);border:1px solid var(--cyan-dark)}
.btn-outline:hover{background:var(--cyan-glow)}
.nav-cta{padding:7px 16px;font-size:0.85rem}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.menu-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* Hero - split 2-col */
.hero{padding:80px 0 60px}
.hero-inner{display:grid;grid-template-columns:1fr 360px;gap:60px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--cyan-glow);border:1px solid var(--cyan-dark);border-radius:20px;padding:6px 14px;font-size:0.82rem;color:var(--cyan);margin-bottom:20px}
.hero h1{font-size:2.8rem;font-weight:800;line-height:1.2;margin-bottom:16px}
.hero h1 em{color:var(--cyan);font-style:normal}
.hero-sub{color:var(--muted);font-size:1.05rem;line-height:1.7;margin-bottom:28px;max-width:480px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:flex;gap:28px}
.hero-stat-item{text-align:center}
.hero-stat-item strong{display:block;font-size:1.6rem;font-weight:800;color:var(--cyan)}
.hero-stat-item span{font-size:0.78rem;color:var(--muted)}
.hero-panel{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:14px}
.hero-panel-title{font-size:0.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.node-row{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;background:var(--surface2);border-radius:8px}
.node-flag{display:flex;align-items:center;gap:8px;font-size:0.9rem;font-weight:500}
.node-ms{font-size:0.85rem;color:var(--cyan);font-weight:600}
.node-dot{width:8px;height:8px;border-radius:50%;background:#22c55e}

/* Section */
.section{padding:72px 0}
.section-head{text-align:center;margin-bottom:48px}
.section-head h2{font-size:2rem;font-weight:700;margin-bottom:10px}
.section-head p{color:var(--muted);max-width:540px;margin:0 auto}
.label{display:inline-block;background:var(--cyan-glow);color:var(--cyan);border:1px solid var(--cyan-dark);border-radius:20px;padding:4px 12px;font-size:0.78rem;font-weight:600;margin-bottom:12px}

/* Feature cards */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;transition:.2s}
.feat-card:hover{border-color:var(--cyan-dark);transform:translateY(-2px)}
.feat-icon{width:44px;height:44px;border-radius:10px;background:var(--cyan-glow);border:1px solid var(--cyan-dark);display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:14px}
.feat-card h4{font-size:1rem;margin-bottom:8px}
.feat-card p{color:var(--muted);font-size:0.88rem;line-height:1.6}

/* Node map section */
.region-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.region-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px;text-align:center}
.region-card .flag{font-size:1.8rem;margin-bottom:8px}
.region-card h5{font-size:0.9rem;margin-bottom:4px}
.region-card p{font-size:0.78rem;color:var(--muted)}

/* Pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:28px;position:relative}
.price-card.hot{border-color:var(--cyan-dark);box-shadow:0 0 0 1px var(--cyan-dark)}
.price-hot-tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--cyan-dark);color:#000;font-size:0.75rem;font-weight:700;padding:3px 12px;border-radius:10px;white-space:nowrap}
.price-name{font-size:1rem;font-weight:600;margin-bottom:6px}
.price-amount{font-size:2.4rem;font-weight:800;color:var(--cyan);margin:10px 0 4px}
.price-amount span{font-size:1rem;font-weight:400;color:var(--muted)}
.price-period{font-size:0.82rem;color:var(--muted);margin-bottom:16px}
.price-list{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.price-list li{font-size:0.88rem;color:var(--muted);padding-left:18px;position:relative}
.price-list li::before{content:"✓";position:absolute;left:0;color:var(--cyan);font-weight:700}

/* FAQ */
.faq-list{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.faq-q{width:100%;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;background:none;border:none;color:var(--text);font-size:0.95rem;font-weight:500;cursor:pointer;text-align:left}
.faq-q::after{content:"+";font-size:1.2rem;color:var(--muted);transition:.2s;flex-shrink:0}
.faq-item.open .faq-q::after{transform:rotate(45deg);color:var(--cyan)}
.faq-a{max-height:0;overflow:hidden;transition:.3s}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 20px 16px;color:var(--muted);font-size:0.9rem;line-height:1.7}

/* Footer */
footer{background:var(--surface);border-top:1px solid var(--border);padding:52px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .logo{margin-bottom:12px}
.footer-brand p{color:var(--muted);font-size:0.85rem;line-height:1.6;max-width:260px}
.footer-col h4{font-size:0.85rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:14px}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--muted);font-size:0.88rem;transition:.2s}
.footer-col a:hover{color:var(--text)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center}
.footer-bottom p{color:var(--muted);font-size:0.82rem}

/* Page hero (inner pages) */
.page-hero{padding:52px 0 40px;background:var(--surface);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:2rem;font-weight:700;margin-bottom:8px}
.page-hero p{color:var(--muted)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.82rem;color:var(--muted);margin-bottom:12px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb span{color:var(--border)}

/* Download page */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:48px}
.dl-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:28px;text-align:center}
.dl-icon{font-size:2.4rem;margin-bottom:12px}
.dl-card h3{font-size:1.05rem;margin-bottom:6px}
.dl-card p{color:var(--muted);font-size:0.85rem;margin-bottom:18px}
.dl-mobile{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:620px;margin:0 auto}
.sub-box{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;margin-top:48px}
.sub-box h3{font-size:1.1rem;margin-bottom:10px}
.sub-box p{color:var(--muted);font-size:0.9rem;margin-bottom:16px}
.sub-code{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:12px 16px;font-family:monospace;font-size:0.85rem;color:var(--cyan);word-break:break-all;margin-bottom:14px}
.sub-steps{display:flex;flex-direction:column;gap:8px}
.sub-steps li{font-size:0.88rem;color:var(--muted);padding-left:18px;position:relative}
.sub-steps li::before{content:counter(step);counter-increment:step;position:absolute;left:0;color:var(--cyan);font-weight:700;font-size:0.78rem}
.sub-steps{counter-reset:step}

/* Tutorial */
.tut-content{max-width:820px}
.tut-sec{margin-bottom:48px}
.tut-sec h2{font-size:1.4rem;font-weight:700;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.tut-sec h3{font-size:1rem;font-weight:600;margin:18px 0 10px}
.tut-sec p{color:var(--muted);line-height:1.7;margin-bottom:10px}
.tut-sec ol,.tut-sec ul{color:var(--muted);padding-left:20px;line-height:2;margin-bottom:10px}
.tip-box{background:var(--cyan-glow);border:1px solid var(--cyan-dark);border-radius:10px;padding:14px 16px;font-size:0.88rem;line-height:1.6;margin-top:14px}

/* Responsive */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-panel{display:none}
  .feat-grid{grid-template-columns:1fr 1fr}
  .price-grid{grid-template-columns:1fr}
  .region-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .dl-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .hero h1{font-size:2rem}
  .feat-grid{grid-template-columns:1fr}
  .region-grid{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:62px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);flex-direction:column;padding:16px;gap:4px}
  .nav-links.open{display:flex}
  .menu-toggle{display:flex}
}