:root{
  --primary:#2980FE;
  --primary-hover:#1768E8;
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --text:#1f2937;
  --muted:#667085;
  --light:#f5f7fb;
  --line:#e5e7eb;
  --card:#ffffff;
  --deep:#111827;
  --radius-lg:30px;
  --radius:22px;
  --shadow:0 18px 48px rgba(35,52,92,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:#fff;color:var(--text);line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,231,235,.78)}
.nav-wrap{width:min(1180px,calc(100% - 28px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#172554;font-size:20px;letter-spacing:.02em}
.brand img,.footer-brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.desktop-nav{display:none;align-items:center;gap:8px;flex-wrap:wrap}
.desktop-nav a{padding:9px 12px;border-radius:999px;color:#475467;font-size:14px;transition:.2s ease}
.desktop-nav a:hover,.desktop-nav a.active{background:#eef4ff;color:#1d4ed8}
.mobile-nav{position:relative}
.mobile-nav summary{list-style:none;cursor:pointer;color:#1d4ed8;border:1px solid #dbeafe;border-radius:999px;padding:8px 14px;background:#f8fbff;font-weight:700}
.mobile-nav summary::-webkit-details-marker{display:none}
.mobile-nav nav{position:absolute;right:0;top:46px;width:210px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;padding:10px;display:grid;gap:4px}
.mobile-nav nav a{padding:10px 12px;border-radius:12px;color:#344054}
.mobile-nav nav a:hover{background:#f2f6ff;color:#1d4ed8}
.section{padding:64px 0}
.section-soft{background:#f7f9fd}
.section-title{max-width:760px;margin:0 auto 28px;text-align:center}
.section-title .eyebrow,.eyebrow{display:inline-flex;align-items:center;gap:6px;color:#1d4ed8;background:#eef4ff;border:1px solid #dbeafe;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:800;margin-bottom:12px}
h1,h2,h3{line-height:1.22;margin:0 0 14px;color:#101828}
h1{font-size:clamp(34px,7vw,62px);letter-spacing:-.05em}
h2{font-size:clamp(26px,4vw,40px);letter-spacing:-.035em}
h3{font-size:21px}
p{margin:0 0 14px;color:#536070}
ul,ol{padding-left:20px;color:#536070}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;background:#2980FE;color:#fff!important;border-radius:999px;font-weight:800;box-shadow:0 14px 32px rgba(41,128,254,.28);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.text-link{color:#1768E8;font-weight:800}
.text-link:hover{text-decoration:underline}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--gradient);color:#fff;padding:58px 0 46px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 18% 20%,rgba(255,255,255,.28),transparent 26%),radial-gradient(circle at 78% 16%,rgba(255,255,255,.22),transparent 24%),linear-gradient(135deg,rgba(255,255,255,.11) 0 1px,transparent 1px 58px);opacity:.95}
.vpn-network-hero:after{content:"";position:absolute;width:540px;height:540px;border:1px solid rgba(255,255,255,.2);border-radius:50%;right:-120px;top:12px;box-shadow:0 0 0 54px rgba(255,255,255,.04),0 0 0 108px rgba(255,255,255,.03)}
.hero-grid{position:relative;z-index:1;display:grid;gap:32px;align-items:center}
.hero-copy h1,.hero-copy p{color:#fff}
.hero-copy p{font-size:17px;max-width:650px;color:rgba(255,255,255,.9)}
.hero-tags,.floating-tags,.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 24px}
.hero-tags span,.floating-tags span,.tag-row span{display:inline-flex;align-items:center;border-radius:999px;padding:7px 12px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);color:#fff;font-size:13px;font-weight:700}
.hero-visual{position:relative;min-height:320px;display:flex;align-items:center;justify-content:center}
.hero-device{position:relative;width:min(430px,92%);padding:18px;border-radius:34px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);box-shadow:0 30px 90px rgba(20,25,60,.25)}
.hero-device img{border-radius:24px;margin:auto}
.status-card{position:absolute;background:rgba(255,255,255,.94);color:#0f172a;border-radius:18px;padding:10px 13px;box-shadow:0 18px 40px rgba(16,24,40,.18);font-weight:800;font-size:13px;border:1px solid rgba(255,255,255,.75)}
.status-card small{display:block;color:#667085;font-weight:700;font-size:11px}
.status-one{left:0;top:22px}.status-two{right:0;top:74px}.status-three{left:10px;bottom:44px}.status-four{right:12px;bottom:0}
.node-overview{margin-top:-26px;position:relative;z-index:3}
.overview-grid{display:grid;grid-template-columns:1fr;gap:14px}
.node-card{background:#fff;border:1px solid #e6ebf3;border-radius:24px;padding:22px;box-shadow:var(--shadow)}
.node-card .mini-label{display:inline-block;color:#1768E8;background:#eef4ff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:800;margin-bottom:10px}
.node-card p{font-size:14px}
.feature-grid,.two-col,.split-section,.tech-grid,.risk-grid,.faq-grid,.page-grid{display:grid;grid-template-columns:1fr;gap:22px;align-items:center}
.service-card,.info-card,.safety-panel,.step-card,.faq-item,.risk-card,.page-card,.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 12px 36px rgba(16,24,40,.06)}
.service-image,.panel-image{background:linear-gradient(180deg,#f8fbff,#edf3ff);border:1px solid #e3ebf6;border-radius:var(--radius-lg);padding:18px;box-shadow:var(--shadow)}
.service-image img,.panel-image img{margin:auto;border-radius:20px}
.vpn-connection-section .feature-list,.check-list{display:grid;gap:10px;margin:18px 0}
.check-item,.feature-list li{list-style:none;background:#f8fbff;border:1px solid #e5efff;border-radius:14px;padding:10px 12px;color:#344054}
.global-nodes-section{background:#f6f8fc;position:relative;overflow:hidden}
.global-nodes-section:before{content:"";position:absolute;inset:50px 0 auto 0;height:340px;background:radial-gradient(circle at 20% 40%,rgba(41,128,254,.18),transparent 18%),radial-gradient(circle at 72% 44%,rgba(123,78,241,.16),transparent 20%),linear-gradient(120deg,transparent 0 34%,rgba(41,128,254,.12) 34% 35%,transparent 35% 62%,rgba(184,77,218,.12) 62% 63%,transparent 63%);pointer-events:none}
.map-panel{position:relative;background:#fff;border:1px solid #e5ebf4;border-radius:30px;padding:24px;box-shadow:var(--shadow)}
.node-dot-list{display:grid;gap:12px;margin-top:18px}
.node-dot{display:flex;gap:10px;align-items:flex-start;padding:12px;border-radius:16px;background:#f8fbff;border:1px solid #e6eefb}
.node-dot:before{content:"";width:10px;height:10px;border-radius:50%;background:#2980FE;margin-top:8px;box-shadow:0 0 0 6px rgba(41,128,254,.12)}
.speed-lines{display:grid;gap:14px;margin-top:18px}
.speed-line{background:#fff;border:1px solid #e5e7eb;border-radius:18px;padding:14px}
.speed-line span{display:block;height:8px;border-radius:999px;background:linear-gradient(90deg,#dbeafe,#2980FE);margin-top:10px}
.privacy-panel{background:#fff;border:1px solid #e7edf6;border-radius:30px;padding:24px;box-shadow:var(--shadow)}
.privacy-matrix{display:grid;gap:12px;margin-top:16px}
.matrix-item{padding:14px;border-radius:18px;background:#f8fbff;border-left:4px solid #2980FE}
.no-log-policy-section .policy-grid{display:grid;grid-template-columns:1fr;gap:14px}
.device-row{display:grid;grid-template-columns:1fr;gap:14px;margin-top:18px}
.device-card{padding:18px;border-radius:20px;background:#f8fbff;border:1px solid #e4ecf8}
.protocol-stack{display:grid;gap:14px}
.protocol-layer{padding:18px;border-radius:20px;background:#fff;border:1px solid #e5e7eb;box-shadow:0 10px 28px rgba(16,24,40,.05)}
.process-steps{display:grid;grid-template-columns:1fr;gap:14px}
.step-num{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border-radius:50%;background:#2980FE;color:#fff;font-weight:900;margin-bottom:12px}
.risk-card{border-left:4px solid #2980FE}
.risk-card strong{display:block;color:#101828;margin-bottom:6px}
.faq-item h3{font-size:18px;margin-bottom:8px}
.cta-section{background:var(--gradient);color:#fff;text-align:center;padding:62px 0;position:relative;overflow:hidden}
.cta-section:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 28% 12%,rgba(255,255,255,.24),transparent 26%),radial-gradient(circle at 76% 92%,rgba(255,255,255,.18),transparent 28%)}
.cta-section .container{position:relative;z-index:1}.cta-section h2,.cta-section p{color:#fff}.cta-section p{max-width:680px;margin:0 auto 22px;color:rgba(255,255,255,.9)}
.page-hero{background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);padding:48px 0 30px;border-bottom:1px solid #edf1f7}
.page-hero .badge{display:inline-flex;color:#1768E8;background:#eef4ff;border:1px solid #dbeafe;border-radius:999px;padding:6px 13px;font-weight:800;font-size:13px;margin-bottom:14px}
.page-hero p{max-width:760px;font-size:17px}
.content-section{padding:42px 0 72px}
.article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 14px 38px rgba(16,24,40,.05)}
.article h2{font-size:26px;margin-top:10px}.article p{margin-bottom:16px}.article .download-btn{margin-top:10px}
.note-box{background:#f8fbff;border:1px solid #dbeafe;border-radius:20px;padding:18px;margin:18px 0}
.note-box h3{font-size:18px}
.list-grid{display:grid;gap:12px;margin:18px 0}.list-grid div{padding:14px;border-radius:16px;background:#f7f9fd;border:1px solid #e5e7eb}
.site-footer{background:#0f172a;color:#cbd5e1;padding:44px 0 0}
.site-footer p,.site-footer a{color:#cbd5e1;font-size:14px}.site-footer h2{color:#fff;font-size:17px;margin-bottom:12px}.site-footer a{display:block;margin:8px 0}.site-footer a:hover{color:#fff}.footer-grid{display:grid;grid-template-columns:1fr;gap:26px}.footer-brand{color:#fff;margin-bottom:12px}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);margin-top:32px;padding:18px;color:#94a3b8;font-size:13px}
@media (min-width:640px){
  .overview-grid,.no-log-policy-section .policy-grid,.device-row,.risk-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr)}
  .article{padding:32px}
}
@media (min-width:900px){
  .mobile-nav{display:none}.desktop-nav{display:flex}
  .vpn-network-hero{padding:74px 0 72px}.hero-grid{grid-template-columns:1.02fr .98fr;gap:42px}
  .overview-grid{grid-template-columns:repeat(4,1fr)}
  .split-section,.two-col,.feature-grid,.page-grid{grid-template-columns:1fr 1fr}
  .tech-grid{grid-template-columns:1.08fr .92fr}
  .risk-grid{grid-template-columns:repeat(4,1fr)}
  .process-steps{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1.4fr .8fr .8fr 1fr}
  .section{padding:84px 0}.content-section{padding:58px 0 86px}
}
@media (min-width:1100px){
  .process-steps{grid-template-columns:repeat(6,1fr)}
}
@media (max-width:420px){
  .download-btn{width:100%;padding-left:18px;padding-right:18px}
  .status-card{position:static;margin:8px 0}.floating-tags{display:grid}.hero-device{width:100%}
  .hero-visual{display:block;min-height:auto}.site-header{position:relative}
}