*{box-sizing:border-box}
:root{
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#1f2937;
  --muted:#64748b;
  --soft:#f6f8fc;
  --line:#e5eaf2;
  --deep:#0f172a;
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --shadow:0 18px 50px rgba(31,41,55,.08);
  --radius:28px;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  background:#fff;
  line-height:1.75;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{
  position:sticky;
  top:0;
  z-index:20;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(229,234,242,.78);
}
.nav-wrap{
  width:min(1160px,calc(100% - 32px));
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:70px;
  gap:18px;
}
.logo,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#172036}
.logo img,.footer-brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;gap:20px;align-items:center}
.site-nav a{font-size:14px;color:#334155;font-weight:600}
.site-nav a:hover{color:var(--blue)}
.nav-toggle{display:none}
.nav-toggle-label{width:40px;height:40px;border:1px solid var(--line);border-radius:14px;display:grid;place-content:center;gap:4px;cursor:pointer;background:#fff}
.nav-toggle-label span{width:18px;height:2px;background:#27364f;border-radius:999px;display:block}
.nav-toggle:checked ~ .site-nav{
  display:flex;
  position:absolute;
  left:16px;
  right:16px;
  top:76px;
  flex-direction:column;
  align-items:flex-start;
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  padding:18px;
  box-shadow:var(--shadow);
}
.container{width:min(1160px,calc(100% - 32px));margin:0 auto}
.section{padding:64px 0}
.section-soft{background:var(--soft)}
.eyebrow,.category-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--blue);
  background:#eef6ff;
  border:1px solid #dbeafe;
  border-radius:999px;
  padding:6px 12px;
  font-size:13px;
  font-weight:800;
}
h1,h2,h3{line-height:1.22;margin:0 0 16px;color:#111827}
h1{font-size:clamp(34px,8vw,64px);letter-spacing:-.05em}
h2{font-size:clamp(28px,5vw,44px);letter-spacing:-.035em}
h3{font-size:22px}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:18px;color:#4b5870}
.download-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:12px 24px;
  background:var(--blue);
  color:#fff;
  border-radius:999px;
  font-weight:800;
  border:0;
  box-shadow:0 12px 28px rgba(41,128,254,.25);
  transition:.2s ease;
}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.text-link{color:var(--blue);font-weight:800}
.text-link:hover{color:var(--blue-dark)}
.vpn-saas-hero{
  position:relative;
  overflow:hidden;
  background:var(--gradient);
  color:#fff;
  padding:66px 0 58px;
}
.vpn-saas-hero:before{
  content:"";
  position:absolute;
  inset:auto -12% -120px -12%;
  height:260px;
  background:#fff;
  transform:skewY(-5deg);
  transform-origin:left top;
}
.hero-grid{
  position:relative;
  display:grid;
  gap:34px;
  align-items:center;
}
.hero-copy h1,.hero-copy p{color:#fff}
.hero-copy .lead{color:rgba(255,255,255,.88)}
.hero-tags,.floating-tags,.tag-row{display:flex;gap:10px;flex-wrap:wrap}
.hero-tags span,.floating-tags span,.tag-row span{
  display:inline-flex;
  padding:7px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.14);
  color:#fff;
  border:1px solid rgba(255,255,255,.24);
  font-weight:700;
  font-size:13px;
}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:24px 0}
.hero-note{color:rgba(255,255,255,.75);font-size:14px}
.hero-visual{
  position:relative;
  border-radius:36px;
  padding:24px;
  background:rgba(255,255,255,.14);
  box-shadow:0 30px 80px rgba(28,23,94,.24);
  backdrop-filter:blur(16px);
}
.hero-visual img{border-radius:30px;margin:auto;max-height:420px;object-fit:contain}
.float-card{
  position:relative;
  margin-top:14px;
  background:#fff;
  color:#1f2937;
  border-radius:24px;
  padding:14px;
  box-shadow:0 16px 38px rgba(17,24,39,.12);
}
.status-line{display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:800}
.status-line small{color:var(--blue);background:#eef6ff;border-radius:999px;padding:4px 9px}
.floating-tags{margin-top:10px}
.floating-tags span{background:#f7f9ff;color:#42526b;border:1px solid var(--line)}
.product-highlights{
  margin-top:-30px;
  position:relative;
  z-index:2;
}
.highlight-grid,.service-mini-grid,.risk-grid,.faq-grid,.info-grid,.card-grid{
  display:grid;
  gap:18px;
}
.highlight-card,.service-card,.risk-card,.faq-item,.info-card,.step-card,.panel-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:26px;
  padding:22px;
  box-shadow:0 12px 32px rgba(15,23,42,.05);
}
.highlight-card .label,.service-card .label,.info-card .label{
  display:inline-flex;
  color:var(--blue);
  font-size:12px;
  font-weight:900;
  background:#eef6ff;
  border-radius:999px;
  padding:4px 9px;
  margin-bottom:12px;
}
.feature-panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:36px;
  padding:26px;
  box-shadow:var(--shadow);
  overflow:hidden;
}
.feature-grid{
  display:grid;
  gap:26px;
  align-items:center;
}
.feature-image{
  background:linear-gradient(180deg,#f7faff,#eef4ff);
  border:1px solid var(--line);
  border-radius:30px;
  padding:18px;
}
.feature-image img{margin:auto;max-height:360px;object-fit:contain}
.check-list,.simple-list{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:10px}
.check-list li,.simple-list li{
  position:relative;
  padding-left:26px;
  color:#475569;
}
.check-list li:before,.simple-list li:before{
  content:"";
  position:absolute;
  left:0;
  top:.65em;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--blue);
  box-shadow:0 0 0 5px #eaf3ff;
}
.high-speed-section .feature-panel{background:linear-gradient(180deg,#fbfdff,#f3f7ff)}
.global-nodes-section .node-panel{
  display:grid;
  gap:18px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:36px;
  padding:26px;
  box-shadow:var(--shadow);
}
.node-meter{
  display:grid;
  gap:14px;
  padding:18px;
  border-radius:24px;
  background:#f8fbff;
  border:1px solid var(--line);
}
.meter-row{display:grid;gap:6px}
.meter-top{display:flex;justify-content:space-between;font-weight:800;color:#334155}
.meter-bar{height:9px;border-radius:999px;background:#e8eef8;overflow:hidden}
.meter-bar i{display:block;height:100%;background:var(--blue);border-radius:999px}
.privacy-panel{
  display:grid;
  gap:18px;
  background:linear-gradient(135deg,#fff 0%,#f6f9ff 100%);
  border:1px solid var(--line);
  border-radius:36px;
  padding:26px;
  box-shadow:var(--shadow);
}
.privacy-points{display:grid;gap:14px}
.no-log-policy-section .info-card,.encryption-protocol-section .info-card{min-height:190px}
.device-stack{display:grid;gap:14px}
.device-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:24px;
  padding:18px;
}
.protocol-panel{
  background:#111d3a;
  border-radius:36px;
  padding:26px;
  color:#fff;
  overflow:hidden;
  position:relative;
}
.protocol-panel:after{
  content:"";
  position:absolute;
  width:240px;
  height:240px;
  right:-90px;
  bottom:-90px;
  background:radial-gradient(circle,rgba(41,128,254,.35),transparent 68%);
}
.protocol-panel h2,.protocol-panel p{color:#fff}
.protocol-list{display:grid;gap:14px;margin-top:22px;position:relative;z-index:1}
.protocol-list div{
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.08);
  border-radius:22px;
  padding:16px;
}
.process-steps{display:grid;gap:16px;counter-reset:step}
.step-card{position:relative}
.step-card:before{
  counter-increment:step;
  content:counter(step);
  display:inline-grid;
  place-items:center;
  width:34px;
  height:34px;
  border-radius:12px;
  background:#eef6ff;
  color:var(--blue);
  font-weight:900;
  margin-bottom:12px;
}
.risk-card{border-left:4px solid var(--blue)}
.risk-card strong{display:block;color:#172036;margin-bottom:6px}
.risk-card em{display:block;font-style:normal;color:#52627a;font-size:14px;margin-top:8px}
.faq-item h3{font-size:18px}
.cta-section{
  background:var(--gradient);
  color:#fff;
  border-radius:38px;
  padding:40px 22px;
  text-align:center;
  overflow:hidden;
  position:relative;
}
.cta-section h2,.cta-section p{color:#fff}
.cta-section .download-btn{background:#2980FE;color:#fff}
.page-hero{
  background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);
  padding:56px 0 28px;
  border-bottom:1px solid var(--line);
}
.page-hero .page-copy{max-width:850px}
.content-layout{
  display:grid;
  gap:24px;
  align-items:start;
}
.article-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:30px;
  padding:24px;
  box-shadow:var(--shadow);
}
.side-card{
  background:#f7faff;
  border:1px solid var(--line);
  border-radius:28px;
  padding:22px;
  position:sticky;
  top:96px;
}
.side-card a{display:block;color:var(--blue);font-weight:800;margin-top:10px}
.page-actions{margin-top:24px}
.download-page-card{
  max-width:860px;
  margin:0 auto;
  text-align:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:34px;
  padding:30px;
  box-shadow:var(--shadow);
}
.site-footer{
  background:#0f172a;
  color:#d9e3f2;
  margin-top:72px;
  padding:44px 0 18px;
}
.footer-wrap{
  width:min(1160px,calc(100% - 32px));
  margin:0 auto;
  display:grid;
  gap:24px;
}
.footer-wrap p{color:#aab8cc;max-width:620px}
.footer-brand{color:#fff}
.footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.footer-links a{color:#cbd5e1}
.footer-links a:hover{color:#fff}
.footer-bottom{
  width:min(1160px,calc(100% - 32px));
  margin:28px auto 0;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);
  color:#94a3b8;
  font-size:14px;
}
@media (min-width:680px){
  .highlight-grid{grid-template-columns:repeat(2,1fr)}
  .risk-grid,.faq-grid,.info-grid,.card-grid{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:960px){
  .nav-toggle-label{display:none}
  .site-nav{display:flex}
  .hero-grid{grid-template-columns:1.05fr .95fr}
  .highlight-grid{grid-template-columns:repeat(4,1fr)}
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-grid.reverse .feature-image{order:-1}
  .global-nodes-section .node-panel{grid-template-columns:1fr 1fr;align-items:center}
  .privacy-panel{grid-template-columns:1.1fr .9fr}
  .privacy-points{grid-template-columns:repeat(3,1fr)}
  .info-grid{grid-template-columns:repeat(3,1fr)}
  .risk-grid{grid-template-columns:repeat(4,1fr)}
  .faq-grid{grid-template-columns:repeat(2,1fr)}
  .content-layout{grid-template-columns:minmax(0,1fr) 310px}
  .footer-wrap{grid-template-columns:1fr 420px}
  .footer-links{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:420px){
  .nav-wrap,.container,.footer-wrap,.footer-bottom{width:min(100% - 24px,1160px)}
  .section{padding:46px 0}
  .hero-actions{align-items:stretch}
  .download-btn{width:100%}
  .feature-panel,.privacy-panel,.protocol-panel,.download-page-card{border-radius:24px;padding:20px}
}