:root{
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --light:#f6f8fc;
    --line:#e6eaf2;
    --card:#ffffff;
    --deep:#111827;
    --radius:24px;
    --shadow:0 18px 45px rgba(39,79,168,.10);
}
*{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;color:var(--text);background:#fff;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.section{padding:64px 0}
.section-soft{background:var(--light)}
.section-title{font-size:clamp(28px,4vw,44px);line-height:1.22;margin:0 0 16px;color:#111827;letter-spacing:-.02em}
.section-desc{color:var(--muted);font-size:17px;margin:0 0 24px;max-width:760px}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:14px;font-weight:700;margin-bottom:14px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:var(--blue);color:#fff!important;font-weight:800;box-shadow:0 12px 25px rgba(41,128,254,.28);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,234,242,.82)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:22px;color:#111827}.logo{width:38px;height:38px;border-radius:12px;object-fit:cover}.nav-toggle{display:none}.nav-toggle-label{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:10px;border:1px solid var(--line);border-radius:12px}.nav-toggle-label span{width:22px;height:2px;background:#25314a;border-radius:2px}.main-nav{position:absolute;left:14px;right:14px;top:70px;display:none;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:10px}.main-nav a{padding:12px 14px;border-radius:12px;color:#344054;font-weight:700}.main-nav a:hover,.main-nav a.active{background:#eef5ff;color:var(--blue)}.nav-toggle:checked~.main-nav{display:flex}
.vpn-network-hero{position:relative;color:#fff;background:var(--gradient);overflow:hidden}.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 18% 25%,rgba(255,255,255,.22),transparent 28%),radial-gradient(circle at 82% 18%,rgba(255,255,255,.18),transparent 26%),linear-gradient(135deg,rgba(255,255,255,.13) 1px,transparent 1px);background-size:auto,auto,38px 38px;opacity:.8}.hero-inner{position:relative;display:grid;gap:34px;align-items:center;padding:72px 0}.hero-content h1{font-size:clamp(34px,7vw,64px);line-height:1.08;margin:0 0 18px;letter-spacing:-.04em}.hero-content p{font-size:18px;color:rgba(255,255,255,.88);margin:0 0 24px;max-width:620px}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.hero-tags span,.floating-tag{border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.14);color:#fff;border-radius:999px;padding:7px 12px;font-size:14px;font-weight:700}.hero-visual{position:relative;padding:18px;border-radius:34px;background:rgba(255,255,255,.14);box-shadow:0 28px 80px rgba(18,35,92,.25);border:1px solid rgba(255,255,255,.22)}.hero-visual img{border-radius:26px;margin:auto}.floating-tag{position:absolute;box-shadow:0 10px 25px rgba(0,0,0,.12)}.tag-one{left:8px;top:24px}.tag-two{right:4px;top:35%}.tag-three{left:26px;bottom:28px}.tag-four{right:20px;bottom:12px}.node-overview{margin-top:-38px;position:relative;z-index:2}.node-grid{display:grid;gap:16px}.node-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}.node-card b{display:inline-flex;color:var(--blue);font-size:13px;padding:4px 10px;background:#eef5ff;border-radius:999px;margin-bottom:10px}.node-card h3{margin:0 0 8px;font-size:20px}.node-card p{margin:0 0 12px;color:var(--muted)}.learn-link{color:var(--blue);font-weight:800}.learn-link:hover{text-decoration:underline}.split-section{display:grid;gap:32px;align-items:center}.image-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:16px;box-shadow:var(--shadow)}.image-panel img{border-radius:22px;margin:auto}.feature-list{display:grid;gap:12px;margin:22px 0}.feature-list div,.mini-card{padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:18px}.feature-list strong{display:block;color:#111827}.feature-list span{color:var(--muted);font-size:15px}.global-nodes-section{position:relative;overflow:hidden}.map-panel{position:relative;background:linear-gradient(135deg,#f8fbff,#eef4ff);border:1px solid var(--line);border-radius:32px;padding:24px;min-height:360px;box-shadow:var(--shadow)}.map-panel:before{content:"";position:absolute;inset:22px;border-radius:28px;background:radial-gradient(circle at 20% 35%,#2980FE 0 4px,transparent 5px),radial-gradient(circle at 70% 25%,#7B4EF1 0 4px,transparent 5px),radial-gradient(circle at 52% 70%,#B84DDA 0 4px,transparent 5px),linear-gradient(115deg,transparent 32%,rgba(41,128,254,.18) 33%,transparent 34%);opacity:.8}.map-panel img{position:relative;z-index:1;border-radius:24px;margin:auto}.node-note{position:relative;z-index:2;background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:20px;padding:18px;margin-top:18px}.speed-cards{display:grid;gap:14px}.speed-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}.speed-line{height:8px;border-radius:999px;background:linear-gradient(90deg,#dfeaff,#2980FE);margin:12px 0}.privacy-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.privacy-tags span{background:#f2f6ff;color:#3158c9;border:1px solid #dce7ff;border-radius:999px;padding:6px 12px;font-weight:700;font-size:14px}.policy-grid,.risk-grid,.faq-grid,.page-card-grid{display:grid;gap:16px}.policy-card,.risk-card,.faq-item,.page-card,.step-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px}.risk-card{border-left:4px solid var(--blue)}.policy-card h3,.risk-card h3,.faq-item h3,.page-card h3,.step-card h3{margin:0 0 8px;color:#111827}.policy-card p,.risk-card p,.faq-item p,.page-card p,.step-card p{margin:0;color:var(--muted)}.device-grid{display:grid;gap:16px}.device-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}.protocol-panel{background:#111f3d;color:#fff;border-radius:32px;padding:28px;position:relative;overflow:hidden}.protocol-panel:after{content:"";position:absolute;right:-80px;top:-80px;width:220px;height:220px;background:rgba(41,128,254,.24);filter:blur(8px);border-radius:50%}.protocol-panel p,.protocol-panel span{color:rgba(255,255,255,.76)}.protocol-grid{display:grid;gap:14px;position:relative;z-index:1}.protocol-item{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:16px}.process-steps{display:grid;gap:16px;counter-reset:step}.step-card{position:relative;padding-left:68px}.step-card:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:22px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:900}.cta-section{background:var(--gradient);color:#fff;border-radius:34px;padding:44px 24px;text-align:center;position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 0,rgba(255,255,255,.22),transparent 28%)}.cta-section h2,.cta-section p,.cta-section a{position:relative}.cta-section h2{font-size:clamp(28px,4vw,44px);margin:0 0 10px}.cta-section p{margin:0 auto 22px;color:rgba(255,255,255,.86);max-width:680px}.page-hero{background:linear-gradient(180deg,#f6f9ff,#fff);padding:52px 0 30px;border-bottom:1px solid var(--line)}.page-hero h1{font-size:clamp(30px,5vw,50px);line-height:1.18;margin:0 0 14px;color:#111827}.page-hero p{margin:0;color:var(--muted);max-width:780px;font-size:17px}.content-layout{display:grid;gap:28px;align-items:start}.article-body{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}.article-body h2{font-size:24px;margin:24px 0 10px;color:#111827}.article-body h2:first-child{margin-top:0}.article-body p{color:#4b5563}.side-panel{background:#f8fbff;border:1px solid var(--line);border-radius:24px;padding:22px;position:sticky;top:92px}.side-panel h3{margin-top:0}.check-list{padding:0;margin:18px 0;list-style:none;display:grid;gap:10px}.check-list li{padding:12px 14px;border-radius:14px;background:#f7f9fc;border:1px solid var(--line);color:#4b5563}.download-center{margin-top:24px}.download-steps{display:grid;gap:14px;margin-top:22px}.download-step{display:flex;gap:14px;padding:16px;border:1px solid var(--line);border-radius:18px;background:#fff}.download-step b{flex:0 0 34px;height:34px;border-radius:50%;background:#eef5ff;color:var(--blue);display:grid;place-items:center}.faq-list{display:grid;gap:14px}.faq-list article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.faq-list h2{font-size:20px;margin:0 0 8px}.faq-list p{margin:0;color:var(--muted)}.site-footer{background:#101828;color:#d0d5dd;margin-top:72px}.footer-grid{display:grid;gap:28px;padding:48px 0}.footer-grid h3{color:#fff;margin:0 0 12px}.footer-grid a{display:block;color:#d0d5dd;margin:8px 0}.footer-grid a:hover{color:#fff}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:22px;margin-bottom:12px}.footer-brand img{width:38px;height:38px;border-radius:12px}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.10);padding:18px;color:#98a2b3;font-size:14px}
@media (min-width:640px){.node-grid,.policy-grid,.device-grid,.page-card-grid{grid-template-columns:repeat(2,1fr)}.risk-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.section{padding:86px 0}.nav-toggle-label{display:none}.main-nav{position:static;display:flex!important;flex-direction:row;align-items:center;background:transparent;border:0;border-radius:0;box-shadow:none;padding:0;gap:4px}.main-nav a{font-size:14px;padding:9px 11px}.hero-inner{grid-template-columns:1.05fr .95fr;padding:96px 0}.node-grid{grid-template-columns:repeat(4,1fr)}.split-section{grid-template-columns:1fr 1fr}.split-section.reverse .image-panel{order:-1}.policy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.faq-grid{grid-template-columns:repeat(3,1fr)}.device-grid{grid-template-columns:repeat(3,1fr)}.protocol-grid{grid-template-columns:repeat(3,1fr)}.content-layout{grid-template-columns:minmax(0,1fr) 320px}.article-body{padding:34px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}.speed-cards{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1120px){.main-nav a{font-size:15px;padding:10px 13px}}
@media (max-width:420px){.container{width:min(100% - 28px,1120px)}.section{padding:50px 0}.hero-inner{padding:56px 0}.floating-tag{position:static;display:inline-flex;margin:6px 4px 0 0}.hero-visual{padding:12px}.download-btn{width:100%}.page-hero{padding-top:42px}.article-body{padding:20px}.cta-section{border-radius:24px}}