:root{
  --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --blue:#2980FE;
  --blue-hover:#1768E8;
  --text:#253041;
  --muted:#667085;
  --light:#F5F7FB;
  --lighter:#F8FAFF;
  --border:#E5EAF3;
  --white:#FFFFFF;
  --shadow:0 18px 45px rgba(34,55,96,.10);
  --radius:24px;
}
*{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:1.72;font-size:16px;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(229,234,243,.9)}
.header-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#18233A;letter-spacing:.02em}
.logo img,.footer-logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);padding:14px;flex-direction:column;gap:4px}
.site-nav a{font-size:14px;color:#475467;padding:11px 12px;border-radius:12px}
.site-nav a:hover,.site-nav a.active{background:#EEF5FF;color:var(--blue)}
.nav-toggle{display:none}
.nav-toggle-label{display:flex;width:42px;height:42px;border:1px solid var(--border);border-radius:14px;align-items:center;justify-content:center;flex-direction:column;gap:5px;background:#fff}
.nav-toggle-label span{width:18px;height:2px;background:#253041;border-radius:2px}
.nav-toggle:checked ~ .site-nav{display:flex}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:999px;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 12px 28px rgba(41,128,254,.25);transition:transform .2s ease,background .2s ease,box-shadow .2s ease}
.download-btn:hover{background:var(--blue-hover);transform:translateY(-2px);box-shadow:0 16px 34px rgba(23,104,232,.28)}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--gradient);color:#fff;padding:80px 0 62px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 20%,rgba(255,255,255,.25),transparent 24%),radial-gradient(circle at 72% 28%,rgba(255,255,255,.18),transparent 26%),linear-gradient(135deg,rgba(255,255,255,.18) 0 1px,transparent 1px 56px);opacity:.75}
.hero-orbit{position:absolute;right:-140px;top:40px;width:520px;height:520px;border:1px solid rgba(255,255,255,.22);border-radius:50%}
.hero-orbit:before,.hero-orbit:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.18);border-radius:50%}.hero-orbit:before{inset:70px}.hero-orbit:after{inset:150px}
.hero-grid{position:relative;display:grid;gap:36px;align-items:center}
.eyebrow,.section-kicker,.page-badge,.mini-label{display:inline-flex;align-items:center;border-radius:999px;font-size:13px;font-weight:800;letter-spacing:.03em}
.eyebrow{background:rgba(255,255,255,.16);padding:8px 14px;color:#fff;margin-bottom:18px}
h1,h2,h3,p{margin-top:0}h1{font-size:clamp(34px,8vw,64px);line-height:1.08;margin-bottom:18px;letter-spacing:-.04em}h2{font-size:clamp(26px,5vw,42px);line-height:1.18;margin-bottom:14px;letter-spacing:-.025em}h3{font-size:20px;line-height:1.25;margin-bottom:10px}.hero-copy p{font-size:18px;max-width:660px;color:rgba(255,255,255,.88);margin-bottom:24px}.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.hero-tags span{border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.13);padding:8px 12px;border-radius:999px;font-size:13px}
.hero-visual{position:relative;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);border-radius:32px;padding:18px;box-shadow:0 20px 60px rgba(24,35,58,.18)}
.hero-visual img{border-radius:26px;margin:auto}.status-card{position:absolute;background:#fff;color:#253041;border:1px solid rgba(229,234,243,.9);box-shadow:0 14px 34px rgba(24,35,58,.14);border-radius:999px;padding:9px 14px;font-size:13px;font-weight:800}.status-a{left:12px;top:18px}.status-b{right:12px;top:26%}.status-c{left:24px;bottom:20%}.status-d{right:24px;bottom:18px}
.page-section{padding:72px 0}.alt-bg{background:var(--lighter)}.section-heading{max-width:760px;margin-bottom:32px}.section-heading.center{text-align:center;margin-left:auto;margin-right:auto}.section-heading p,.section-copy p,.article-panel p,.side-panel p{color:var(--muted)}.section-kicker,.page-badge,.mini-label{background:#EEF5FF;color:var(--blue);padding:7px 12px;margin-bottom:14px}.node-overview-section{background:linear-gradient(180deg,#fff 0%,#F8FAFF 100%);padding:64px 0}.node-overview{display:grid;gap:16px}.node-card,.info-card,.policy-grid article,.process-steps article,.risk-grid article,.article-panel,.side-panel,.privacy-panel,.visual-card,.nodes-content-card,.protocol-panel{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 12px 32px rgba(34,55,96,.06)}.node-card{padding:22px}.node-card span{display:inline-flex;background:#EAF3FF;color:var(--blue);font-weight:900;padding:4px 10px;border-radius:999px;margin-bottom:14px}.node-card p{color:var(--muted);min-height:54px}.node-card a,.text-link,.process-steps a,.risk-grid a{color:var(--blue);font-weight:800}.split-section,.speed-grid,.privacy-grid,.nodes-layout,.protocol-grid,.sub-hero-grid,.download-grid,.about-grid,.readable-layout,.faq-grid{display:grid;gap:28px;align-items:center}.visual-card{padding:16px}.visual-card img,.sub-visual img,.nodes-map-panel img,.privacy-panel img,.protocol-panel img{border-radius:22px}.section-copy{max-width:560px}.feature-list{list-style:none;padding:0;margin:18px 0}.feature-list li{padding-left:26px;position:relative;margin-bottom:9px;color:#475467}.feature-list li:before{content:"";position:absolute;left:0;top:10px;width:9px;height:9px;border-radius:50%;background:var(--blue)}.global-nodes-section{background:linear-gradient(180deg,#fff,#F5F8FF)}.nodes-map-panel{position:relative;padding:20px;background:radial-gradient(circle at 50% 50%,#EAF3FF,transparent 62%);border-radius:30px;border:1px solid var(--border)}.nodes-map-panel:before{content:"";position:absolute;inset:20px;border-radius:28px;background:linear-gradient(135deg,rgba(41,128,254,.14) 0 1px,transparent 1px 44px)}.nodes-map-panel img{position:relative}.nodes-content-card{padding:28px}.node-pills,.privacy-tags{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}.node-pills span,.privacy-tags span{background:#F2F6FC;border:1px solid var(--border);border-radius:999px;padding:7px 11px;color:#475467;font-size:13px}.speed-cards{display:grid;gap:12px;margin:18px 0}.speed-cards div{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--border)}.speed-cards strong,.speed-cards span{display:block}.speed-cards span{color:var(--muted);font-size:14px}.privacy-panel{padding:18px}.policy-grid{display:grid;gap:16px}.policy-grid article{padding:24px}.center-link{text-align:center;margin-top:22px}.protocol-panel{position:relative;padding:18px;overflow:hidden}.protocol-lines span{display:block;height:8px;background:#EAF3FF;border-radius:999px;margin:10px 0}.process-steps{display:grid;gap:16px}.process-steps article{padding:22px;position:relative}.process-steps span{display:inline-flex;width:36px;height:36px;border-radius:50%;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:900;margin-bottom:12px}.risk-grid{display:grid;gap:16px}.risk-grid article{padding:22px;border-left:4px solid var(--blue)}.risk-grid strong,.risk-grid span{display:block}.risk-grid span{color:var(--muted);margin-bottom:8px}.faq-list{display:grid;gap:14px}.faq-list details{background:#fff;border:1px solid var(--border);border-radius:18px;padding:18px 20px}.faq-list summary{font-weight:800;cursor:pointer}.faq-list p{color:var(--muted);margin:10px 0 0}.faq-list.compact{gap:12px}.cta-section{padding:72px 0;background:var(--gradient);color:#fff;text-align:center}.cta-inner{max-width:760px}.cta-inner p{color:rgba(255,255,255,.88);margin-bottom:24px}.sub-hero{background:linear-gradient(135deg,#F5F8FF,#FFFFFF);padding:58px 0;border-bottom:1px solid var(--border)}.sub-hero.simple .container{max-width:820px}.sub-hero h1{color:#18233A}.sub-hero p{color:var(--muted);font-size:18px;max-width:720px}.sub-visual{background:var(--gradient);border-radius:30px;padding:20px;box-shadow:var(--shadow)}.download-hero .sub-visual{background:linear-gradient(135deg,#EAF3FF,#FFFFFF)}.article-panel{padding:26px}.article-panel h2{font-size:26px;margin-top:12px}.side-panel{padding:24px;align-self:start}.side-card-stack{display:grid;gap:14px}.info-card{padding:18px}.mini-label{font-size:12px;padding:5px 10px}.note-panel{margin-top:24px;padding:20px;border-radius:20px;background:#F8FAFF;border:1px solid var(--border)}.check-list,.number-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}.check-list li,.number-list li{display:grid;gap:4px;padding:14px;border-radius:16px;background:#fff;border:1px solid var(--border)}.check-list span,.number-list span{color:var(--muted)}.number-list{counter-reset:num}.number-list li{position:relative;padding-left:54px}.number-list li:before{counter-increment:num;content:counter(num);position:absolute;left:14px;top:16px;width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center}.vision-panel{background:linear-gradient(180deg,#fff,#F8FAFF)}.site-footer{background:#18233A;color:#D5DCEB;padding:56px 0 24px}.footer-grid{display:grid;gap:28px}.site-footer p{color:#B7C0D3}.site-footer h3{color:#fff;font-size:16px}.site-footer a{display:block;color:#D5DCEB;margin:8px 0}.footer-logo{color:#fff;margin-bottom:12px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;display:flex;gap:12px;justify-content:space-between;flex-wrap:wrap;color:#AEB8CC;font-size:14px}
@media (min-width:640px){.node-overview,.policy-grid,.risk-grid,.speed-cards,.process-steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:860px){.nav-toggle-label{display:none}.site-nav{display:flex;position:static;flex-direction:row;align-items:center;background:transparent;border:0;box-shadow:none;padding:0;gap:2px}.site-nav a{padding:8px 10px;font-size:13px}.hero-grid{grid-template-columns:1.05fr .95fr}.vpn-network-hero{padding:96px 0 82px}.node-overview{grid-template-columns:repeat(4,1fr)}.split-section,.speed-grid,.privacy-grid,.nodes-layout,.protocol-grid,.sub-hero-grid,.download-grid,.about-grid,.readable-layout,.faq-grid{grid-template-columns:1fr 1fr}.reverse .visual-card{order:2}.policy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}.page-section{padding:84px 0}.article-panel{padding:34px}.side-panel{position:sticky;top:98px}.faq-grid{align-items:start}}
@media (min-width:1080px){.site-nav a{font-size:14px;padding:9px 12px}.risk-grid{grid-template-columns:repeat(4,1fr)}.hero-copy p{font-size:19px}}
@media (max-width:480px){.container{width:min(100% - 24px,1120px)}.header-inner{min-height:64px}.site-nav{top:64px}.vpn-network-hero{padding:56px 0 48px}.status-card{font-size:12px;padding:7px 10px}.status-b{top:18%;right:4px}.status-c{bottom:16%;left:5px}.download-btn{width:100%;padding:0 18px}.sub-hero{padding:44px 0}.page-section{padding:52px 0}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}}