:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#6b7280;
    --light:#f5f7fb;
    --line:#e5e7eb;
    --card:#ffffff;
    --soft-blue:#eef5ff;
    --radius:24px;
    --shadow:0 18px 45px rgba(34,72,140,.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:1.75;font-size:16px;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,231,235,.85)}
.header-inner{max-width:1180px;margin:0 auto;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#111827;white-space:nowrap}
.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:14px;grid-template-columns:1fr;gap:4px}
.site-nav a{padding:11px 12px;border-radius:12px;color:#4b5563;font-size:15px}
.site-nav a.active,.site-nav a:hover{background:var(--soft-blue);color:var(--blue)}
.nav-toggle{display:none}
.nav-toggle:checked~.site-nav{display:grid}
.nav-toggle-label{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#fff;cursor:pointer}
.nav-toggle-label span{width:18px;height:2px;background:#374151;border-radius:4px}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.section{padding:68px 0}
.section-soft{background:var(--light)}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;color:var(--blue);background:var(--soft-blue);border:1px solid #dbeafe;border-radius:999px;padding:6px 12px;font-weight:700;font-size:13px}
h1,h2,h3{line-height:1.25;margin:0 0 16px;color:#111827}
h1{font-size:clamp(34px,8vw,62px);letter-spacing:-.04em}
h2{font-size:clamp(27px,5vw,42px);letter-spacing:-.025em}
h3{font-size:21px}.lead{font-size:18px;color:#4b5563;margin:0 0 22px}.muted{color:var(--muted)}
.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;box-shadow:0 14px 28px rgba(41,128,254,.25);transition:.2s ease;white-space:nowrap;border:none}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.link-more{color:var(--blue);font-weight:800;display:inline-flex;align-items:center;gap:6px}.link-more:after{content:"→"}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--gradient);color:#fff;padding:64px 0 42px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 75% 20%,rgba(255,255,255,.28),transparent 28%),linear-gradient(135deg,rgba(255,255,255,.16) 1px,transparent 1px);background-size:auto,46px 46px;opacity:.65}
.vpn-network-hero:after{content:"";position:absolute;width:680px;height:260px;border:1px solid rgba(255,255,255,.28);border-radius:50%;right:-180px;top:95px;transform:rotate(-16deg)}
.hero-grid{position:relative;z-index:1;display:grid;gap:34px;align-items:center}.hero-copy h1,.hero-copy p{color:#fff}.hero-copy .lead{color:rgba(255,255,255,.88);max-width:640px}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 26px}.hero-tags span{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.32);padding:7px 12px;border-radius:999px;font-size:14px}.hero-visual{position:relative;min-height:330px;display:flex;align-items:center;justify-content:center}.hero-device{position:relative;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:32px;padding:22px;box-shadow:0 28px 70px rgba(17,24,39,.22);backdrop-filter:blur(10px);max-width:430px}.hero-device img{border-radius:24px}.status-pill{position:absolute;background:#fff;color:#1f2937;border:1px solid rgba(255,255,255,.5);box-shadow:0 16px 35px rgba(31,41,55,.16);border-radius:999px;padding:8px 13px;font-size:13px;font-weight:800}.pill-a{top:20px;left:4px}.pill-b{right:0;top:90px}.pill-c{left:10px;bottom:70px}.pill-d{right:18px;bottom:20px}.overview-wrap{margin-top:-34px;position:relative;z-index:3}.node-overview{display:grid;gap:16px}.node-card,.feature-card,.risk-card,.faq-item,.step-card,.note-card,.mini-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 28px rgba(17,24,39,.05)}.node-card .tag{display:inline-flex;margin-bottom:10px;background:var(--blue);color:#fff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:800}.node-card p,.feature-card p,.risk-card p,.step-card p{margin:0 0 12px;color:#5b6472}.split-section{display:grid;gap:30px;align-items:center}.image-panel{border-radius:32px;background:linear-gradient(180deg,#f8fbff,#eef5ff);border:1px solid var(--line);padding:22px;box-shadow:var(--shadow)}.image-panel img{border-radius:24px;margin:auto}.bullet-list{display:grid;gap:12px;margin:20px 0}.bullet-list span,.check-list li{display:flex;gap:10px;align-items:flex-start;color:#4b5563}.bullet-list span:before,.check-list li:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue);margin-top:10px;flex:0 0 auto}.check-list{padding:0;margin:16px 0 0;list-style:none;display:grid;gap:10px}.global-nodes-section{background:#f7faff;position:relative;overflow:hidden}.global-map-card{position:relative;border-radius:34px;background:#fff;border:1px solid #dbe7ff;padding:24px;box-shadow:var(--shadow);overflow:hidden}.global-map-card:before{content:"";position:absolute;inset:18px;background:radial-gradient(circle at 20% 35%,#2980FE 0 4px,transparent 5px),radial-gradient(circle at 70% 28%,#7B4EF1 0 5px,transparent 6px),radial-gradient(circle at 52% 70%,#B84DDA 0 4px,transparent 5px),linear-gradient(30deg,transparent 49%,rgba(41,128,254,.16) 50%,transparent 51%);opacity:.75}.global-map-card img{position:relative;z-index:1;border-radius:24px}.line-cards{display:grid;gap:14px;margin-top:20px}.line-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px}.line-card strong{display:block;color:#111827}.high-speed-section{background:linear-gradient(180deg,#f8fbff 0%,#f4f6fb 100%)}.speed-panel{display:grid;gap:14px}.speed-row{display:flex;justify-content:space-between;gap:12px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px}.speed-bar{height:8px;flex:1;background:#e8eef8;border-radius:999px;overflow:hidden}.speed-bar span{display:block;height:100%;background:var(--blue);border-radius:999px}.privacy-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:26px;box-shadow:var(--shadow)}.privacy-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.privacy-tags span{background:#f3f6fb;border:1px solid var(--line);border-radius:999px;padding:6px 12px;color:#4b5563;font-weight:700}.policy-grid,.risk-grid,.feature-grid{display:grid;gap:16px}.policy-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 28px rgba(17,24,39,.04)}.device-showcase{display:grid;gap:16px}.device-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.protocol-panel{background:#0f172a;color:#e5e7eb;border-radius:32px;padding:24px;position:relative;overflow:hidden}.protocol-panel:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at top right,rgba(41,128,254,.35),transparent 40%)}.protocol-panel>*{position:relative}.protocol-panel h3{color:#fff}.protocol-list{display:grid;gap:12px;margin-top:16px}.protocol-list div{border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);border-radius:18px;padding:14px}.process-steps{display:grid;gap:16px;counter-reset:step}.step-card{position:relative;padding-left:74px}.step-card:before{counter-increment:step;content:counter(step, decimal-leading-zero);position:absolute;left:22px;top:22px;width:38px;height:38px;border-radius:14px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}.risk-card{border-left:4px solid var(--blue)}.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px;margin-bottom:8px}.faq-item p{margin:0;color:#5b6472}.cta-section{background:var(--gradient);color:#fff;text-align:center;padding:70px 0;position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;left:8%;right:8%;top:18px;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent)}.cta-section .container{position:relative}.cta-section h2,.cta-section p{color:#fff}.cta-section p{max-width:680px;margin:0 auto 24px;color:rgba(255,255,255,.86)}.page-hero{background:linear-gradient(180deg,#f7faff,#fff);padding:56px 0 30px;border-bottom:1px solid var(--line)}.page-hero .lead{max-width:760px}.content-layout{display:grid;gap:24px;align-items:start}.article-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:0 14px 34px rgba(17,24,39,.04)}.article-panel p{color:#4b5563}.aside-panel{background:#f8fbff;border:1px solid #dbe7ff;border-radius:26px;padding:20px;position:sticky;top:92px}.aside-panel a{display:block;color:var(--blue);font-weight:800;margin:10px 0}.info-grid{display:grid;gap:16px;margin:22px 0}.download-center{text-align:center;margin-top:26px}.download-steps{counter-reset:down;display:grid;gap:14px;margin-top:22px}.download-step{position:relative;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px 18px 18px 62px}.download-step:before{counter-increment:down;content:counter(down);position:absolute;left:18px;top:18px;width:32px;height:32px;background:var(--blue);color:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:900}.site-footer{background:#111827;color:#d1d5db}.footer-inner{width:min(1120px,calc(100% - 36px));margin:0 auto;padding:44px 0;display:grid;gap:30px}.footer-brand p{max-width:420px;color:#9ca3af}.footer-logo span{color:#fff}.footer-links{display:grid;gap:22px}.footer-links strong{display:block;color:#fff;margin-bottom:10px}.footer-links a{display:block;color:#9ca3af;margin:6px 0}.footer-links a:hover{color:#fff}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.08);padding:16px;color:#9ca3af;font-size:14px}
@media (min-width:640px){.node-overview{grid-template-columns:repeat(2,1fr)}.policy-grid,.risk-grid,.feature-grid,.info-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.footer-links{grid-template-columns:repeat(3,1fr)}}
@media (min-width:900px){.nav-toggle-label{display:none}.site-nav{position:static;display:flex;background:transparent;border:0;box-shadow:none;padding:0;gap:2px}.site-nav a{font-size:14px}.vpn-network-hero{padding:86px 0 74px}.hero-grid{grid-template-columns:1.03fr .97fr}.node-overview{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)}.feature-grid{grid-template-columns:repeat(3,1fr)}.content-layout{grid-template-columns:minmax(0,1fr) 310px}.article-panel{padding:34px}.footer-inner{grid-template-columns:1fr 1.35fr}.device-showcase{grid-template-columns:repeat(3,1fr)}}
@media (max-width:420px){.container{width:min(100% - 28px,1120px)}.section{padding:52px 0}.hero-visual{min-height:280px}.status-pill{font-size:12px;padding:7px 10px}.pill-b{right:-4px}.download-btn{width:100%}.article-panel{padding:20px}.header-inner{padding:12px 14px}.site-nav{left:12px;right:12px}}