:root{
  --primary:#2980FE;
  --primary-dark:#1768E8;
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --text:#1f2937;
  --muted:#64748b;
  --light:#f6f8fc;
  --line:#e5eaf3;
  --card:#ffffff;
  --soft-blue:#eef5ff;
  --radius-lg:32px;
  --radius-md:22px;
  --shadow:0 18px 50px rgba(31,41,55,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.7;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
p{margin:0 0 16px}
h1,h2,h3{margin:0 0 16px;line-height:1.25;color:#111827}
h1{font-size:clamp(34px,7vw,64px);letter-spacing:-.04em}
h2{font-size:clamp(26px,4vw,42px);letter-spacing:-.03em}
h3{font-size:20px}
.container{
  width:min(1120px,calc(100% - 36px));
  margin:0 auto;
}
.section{padding:64px 0}
.section-soft{background:var(--light)}
.kicker,.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  color:var(--primary);
  background:#eef5ff;
  border:1px solid #dbeafe;
  border-radius:999px;
  font-size:14px;
  font-weight:700;
  margin-bottom:16px;
}
.download-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:13px 24px;
  border-radius:999px;
  background:#2980FE;
  color:#fff;
  font-weight:800;
  box-shadow:0 14px 28px rgba(41,128,254,.25);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.download-btn:hover{
  background:#1768E8;
  transform:translateY(-2px);
  box-shadow:0 18px 36px rgba(23,104,232,.28);
}
.text-link{
  color:var(--primary);
  font-weight:800;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.text-link:after{content:"›";font-size:18px}
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid rgba(229,234,243,.8);
}
.header-inner{
  width:min(1180px,calc(100% - 28px));
  margin:0 auto;
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand,.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:900;
  color:#111827;
}
.brand-logo{width:42px;height:42px;border-radius:13px;object-fit:cover}
.brand-name{font-size:20px}
.nav-toggle{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;background:#1f2937;margin:0 auto;border-radius:2px}
.site-nav{
  position:absolute;
  left:14px;
  right:14px;
  top:78px;
  display:none;
  flex-direction:column;
  gap:6px;
  padding:14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  box-shadow:var(--shadow);
}
.site-nav.is-open{display:flex}
.site-nav a{
  padding:11px 14px;
  border-radius:14px;
  color:#334155;
  font-weight:700;
}
.site-nav a:hover{background:#f1f5f9;color:var(--primary)}
.vpn-network-hero{
  position:relative;
  overflow:hidden;
  background:var(--gradient);
  color:#fff;
}
.vpn-network-hero:before,
.vpn-network-hero:after{
  content:"";
  position:absolute;
  border-radius:999px;
  pointer-events:none;
}
.vpn-network-hero:before{
  width:420px;height:420px;
  right:-160px;top:-120px;
  background:rgba(255,255,255,.18);
  filter:blur(4px);
}
.vpn-network-hero:after{
  width:300px;height:300px;
  left:-110px;bottom:-150px;
  background:rgba(255,255,255,.16);
}
.hero-inner{
  position:relative;
  z-index:1;
  width:min(1180px,calc(100% - 36px));
  margin:0 auto;
  padding:74px 0 58px;
  display:grid;
  gap:34px;
}
.hero-content h1,.hero-content p,.hero-tags span{color:#fff}
.hero-content p{font-size:18px;max-width:620px;color:rgba(255,255,255,.88)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin:26px 0}
.hero-note{color:rgba(255,255,255,.82);font-size:14px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-tags span{
  display:inline-flex;
  padding:8px 12px;
  border:1px solid rgba(255,255,255,.3);
  border-radius:999px;
  background:rgba(255,255,255,.12);
  font-weight:700;
  font-size:14px;
}
.hero-visual{
  position:relative;
  min-height:330px;
  display:grid;
  place-items:center;
}
.hero-visual:before{
  content:"";
  position:absolute;
  inset:8%;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.26);
  background:
    radial-gradient(circle at 28% 34%,rgba(255,255,255,.9) 0 3px,transparent 4px),
    radial-gradient(circle at 70% 24%,rgba(255,255,255,.9) 0 3px,transparent 4px),
    radial-gradient(circle at 58% 76%,rgba(255,255,255,.8) 0 3px,transparent 4px),
    linear-gradient(130deg,transparent 0 38%,rgba(255,255,255,.25) 39% 40%,transparent 41% 100%);
}
.hero-visual img{
  position:relative;
  z-index:2;
  max-height:380px;
  border-radius:30px;
  filter:drop-shadow(0 26px 48px rgba(18,35,80,.28));
}
.float-card{
  position:absolute;
  z-index:3;
  padding:10px 13px;
  border:1px solid rgba(255,255,255,.35);
  border-radius:16px;
  background:rgba(255,255,255,.92);
  color:#1f2937;
  font-weight:800;
  box-shadow:0 18px 40px rgba(15,23,42,.16);
  font-size:13px;
}
.float-card.one{left:4%;top:18%}
.float-card.two{right:4%;top:28%}
.float-card.three{left:8%;bottom:22%}
.float-card.four{right:8%;bottom:12%}
.node-overview{
  margin-top:-38px;
  position:relative;
  z-index:3;
}
.overview-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
}
.node-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:24px;
  padding:22px;
  box-shadow:0 12px 28px rgba(15,23,42,.06);
}
.node-card .tag{
  display:inline-flex;
  color:var(--primary);
  background:#eef5ff;
  border-radius:999px;
  padding:5px 10px;
  font-size:13px;
  font-weight:800;
  margin-bottom:12px;
}
.node-card p{color:var(--muted)}
.split{
  display:grid;
  gap:30px;
  align-items:center;
}
.split-media{
  position:relative;
  background:linear-gradient(180deg,#f8fbff,#eef4ff);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:20px;
  box-shadow:var(--shadow);
}
.split-media img{border-radius:24px;margin:auto}
.feature-list{
  display:grid;
  gap:12px;
  margin:22px 0;
  padding:0;
  list-style:none;
}
.feature-list li{
  position:relative;
  padding:13px 14px 13px 40px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  color:#334155;
}
.feature-list li:before{
  content:"";
  position:absolute;
  left:16px;top:20px;
  width:10px;height:10px;
  border-radius:50%;
  background:var(--primary);
}
.global-nodes-section{
  background:
    radial-gradient(circle at 20% 30%,rgba(41,128,254,.12),transparent 28%),
    radial-gradient(circle at 80% 20%,rgba(123,78,241,.12),transparent 28%),
    #fff;
}
.node-map-panel{
  position:relative;
  min-height:360px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:
    linear-gradient(90deg,rgba(41,128,254,.08) 1px,transparent 1px),
    linear-gradient(0deg,rgba(41,128,254,.08) 1px,transparent 1px),
    #f8fbff;
  background-size:36px 36px;
  padding:22px;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.node-map-panel img{
  position:absolute;
  right:8%;
  bottom:0;
  width:min(360px,74%);
  opacity:.92;
}
.node-chip{
  position:relative;
  z-index:2;
  display:inline-flex;
  margin:8px;
  padding:9px 12px;
  background:#fff;
  color:#1f2937;
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 10px 24px rgba(15,23,42,.08);
  font-weight:800;
  font-size:13px;
}
.speed-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:24px;
  padding:18px;
  margin:18px 0;
}
.speed-line{
  height:10px;
  margin-top:12px;
  border-radius:999px;
  background:linear-gradient(90deg,#dbeafe,#2980FE 55%,#b84dda);
}
.privacy-panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--shadow);
}
.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.privacy-tags span{
  padding:9px 12px;
  border-radius:999px;
  background:#eef5ff;
  color:var(--primary);
  font-weight:800;
  font-size:13px;
}

.policy-head{
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
  align-items:center;
  margin-bottom:22px;
}
.policy-head img{
  max-height:180px;
  object-fit:contain;
  justify-self:start;
  border-radius:24px;
  background:#fff;
  border:1px solid var(--line);
  padding:12px;
}
.protocol-image{
  max-height:130px;
  object-fit:contain;
  margin:0 0 18px auto;
  border-radius:22px;
}

.no-log-policy-section .policy-grid,
.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
}
.info-card,.policy-card,.faq-item,.risk-card,.step-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  padding:22px;
  box-shadow:0 10px 28px rgba(15,23,42,.05);
}
.policy-card p,.info-card p,.risk-card p,.step-card p,.faq-item p{color:var(--muted)}
.device-grid{
  display:grid;
  gap:16px;
  grid-template-columns:1fr;
  margin-top:20px;
}
.device-card{
  border:1px solid var(--line);
  border-radius:20px;
  padding:18px;
  background:#fff;
}
.protocol-panel{
  border-radius:var(--radius-lg);
  background:#0f172a;
  color:#e5e7eb;
  padding:24px;
  overflow:hidden;
}
.protocol-panel h3{color:#fff}
.protocol-row{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  padding:16px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.protocol-row:last-child{border-bottom:0}
.protocol-row strong{color:#fff}
.protocol-row span{color:#cbd5e1}
.process-steps{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
  counter-reset:step;
}
.step-card{
  position:relative;
  padding-left:74px;
}
.step-card:before{
  counter-increment:step;
  content:counter(step);
  position:absolute;
  left:22px;top:22px;
  width:36px;height:36px;
  display:grid;
  place-items:center;
  background:var(--primary);
  color:#fff;
  border-radius:14px;
  font-weight:900;
}
.risk-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
}
.risk-card{
  border-left:4px solid var(--primary);
}
.faq-list{
  display:grid;
  gap:14px;
}
.faq-item h3{font-size:18px}
.cta-section{
  background:var(--gradient);
  color:#fff;
  text-align:center;
  border-radius:0;
}
.cta-section h2,.cta-section p{color:#fff}
.cta-section p{max-width:700px;margin:0 auto 22px;color:rgba(255,255,255,.88)}
.page-hero{
  padding:58px 0 34px;
  background:linear-gradient(180deg,#f8fbff,#fff);
  border-bottom:1px solid var(--line);
}
.page-hero .container{max-width:960px}
.page-summary{
  font-size:18px;
  color:var(--muted);
  max-width:760px;
}
.content-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:start;
}
.article-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:28px;
  padding:24px;
  box-shadow:var(--shadow);
}
.article-card p{color:#475569}
.aside-card{
  background:#f8fbff;
  border:1px solid var(--line);
  border-radius:24px;
  padding:22px;
}
.check-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:12px;
}
.check-list li{
  padding:12px 14px;
  border-radius:14px;
  background:#fff;
  border:1px solid var(--line);
}
.download-strip{
  margin-top:24px;
  padding:22px;
  background:#f8fbff;
  border:1px solid var(--line);
  border-radius:24px;
}
.download-page-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
.numbered{
  margin:0;
  padding-left:20px;
  color:#475569;
}
.numbered li{margin:8px 0}
.site-footer{
  background:#111827;
  color:#cbd5e1;
  padding-top:48px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
}
.footer-logo{width:38px;height:38px;border-radius:12px;object-fit:cover}
.footer-brand{color:#fff;font-size:20px;margin-bottom:14px}
.site-footer h3{color:#fff;font-size:16px}
.site-footer a{
  display:block;
  color:#cbd5e1;
  margin:8px 0;
}
.site-footer a:hover{color:#fff}
.footer-bottom{
  margin-top:34px;
  border-top:1px solid rgba(255,255,255,.1);
  padding:18px;
  text-align:center;
  color:#94a3b8;
  font-size:14px;
}
@media (min-width:720px){
  .overview-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid,.risk-grid,.process-steps,.device-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}
  .download-page-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:980px){
  .policy-head{grid-template-columns:1fr 260px}
  .policy-head img{justify-self:end}

  .nav-toggle{display:none}
  .site-nav{
    position:static;
    display:flex !important;
    flex-direction:row;
    align-items:center;
    padding:0;
    background:transparent;
    border:0;
    box-shadow:none;
    gap:2px;
  }
  .site-nav a{font-size:14px;padding:9px 10px}
  .hero-inner{grid-template-columns:1.05fr .95fr;padding:96px 0 82px}
  .split{grid-template-columns:1fr 1fr}
  .split.reverse .split-media{order:2}
  .overview-grid{grid-template-columns:repeat(4,1fr)}
  .no-log-policy-section .policy-grid{grid-template-columns:repeat(3,1fr)}
  .card-grid{grid-template-columns:repeat(3,1fr)}
  .risk-grid{grid-template-columns:repeat(4,1fr)}
  .process-steps{grid-template-columns:repeat(3,1fr)}
  .content-layout{grid-template-columns:minmax(0,1fr) 320px}
  .article-card{padding:34px}
  .protocol-row{grid-template-columns:180px 1fr}
}
@media (max-width:420px){
  .container,.hero-inner{width:calc(100% - 28px)}
  .section{padding:50px 0}
  .hero-content p,.page-summary{font-size:16px}
  .download-btn{width:100%;padding:13px 18px}
  .float-card{font-size:12px;padding:8px 10px}
  .step-card{padding-left:62px}
}