:root{
    --gradient: linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --light:#f5f7fb;
    --line:#e5e7eb;
    --card:#ffffff;
    --deep:#0f172a;
    --shadow:0 18px 45px rgba(15,23,42,.08);
    --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:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.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(16px);border-bottom:1px solid rgba(226,232,240,.85)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo,.footer-logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--deep);letter-spacing:.02em}
.logo img,.footer-logo img{width:40px;height:40px;border-radius:12px;object-fit:cover;box-shadow:0 8px 18px rgba(41,128,254,.16)}
.nav-toggle{display:none}.nav-toggle-label{display:flex;flex-direction:column;gap:5px;padding:9px;border:1px solid var(--line);border-radius:12px;cursor:pointer}.nav-toggle-label span{width:22px;height:2px;background:#1f2937;border-radius:99px}
.site-nav{position:absolute;left:16px;right:16px;top:76px;display:none;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:12px;box-shadow:var(--shadow)}
.site-nav a{font-size:14px;color:#344054;padding:10px 12px;border-radius:12px}.site-nav a:hover{background:#f2f6ff;color:var(--blue)}
.nav-toggle:checked ~ .site-nav{display:flex}
.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 14px 30px rgba(41,128,254,.24);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 18px 38px rgba(23,104,232,.28)}
.kicker,.category-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:13px;font-weight:800}
.section{padding:64px 0}.section-soft{background:linear-gradient(180deg,#f8fbff 0%,#fff 100%)}
.section-title{max-width:760px;margin:0 auto 30px;text-align:center}.section-title h2{margin:8px 0 10px;font-size:30px;line-height:1.2;color:var(--deep)}.section-title p{margin:0;color:var(--muted)}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--gradient);color:#fff;padding:54px 0 72px}.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 18%,rgba(255,255,255,.24),transparent 24%),radial-gradient(circle at 82% 26%,rgba(255,255,255,.18),transparent 28%),linear-gradient(135deg,rgba(255,255,255,.15) 1px,transparent 1px);background-size:auto,auto,34px 34px;opacity:.72}.hero-inner{position:relative;z-index:1;display:grid;gap:34px;align-items:center}.hero-copy h1{margin:0 0 18px;font-size:38px;line-height:1.13;letter-spacing:-.04em}.hero-copy p{font-size:17px;color:rgba(255,255,255,.9);margin:0 0 24px;max-width:680px}.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.hero-tags span{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);font-size:13px;color:#fff}.hero-visual{position:relative;min-height:300px;display:flex;align-items:center;justify-content:center}.hero-visual:before{content:"";position:absolute;width:92%;height:76%;border:1px solid rgba(255,255,255,.25);border-radius:36px;transform:rotate(-4deg)}.hero-visual img{position:relative;z-index:2;width:min(420px,82vw);border-radius:28px;filter:drop-shadow(0 28px 52px rgba(0,0,0,.24))}.floating-status{position:absolute;z-index:3;padding:10px 14px;border-radius:16px;background:rgba(255,255,255,.92);color:#172033;font-size:13px;font-weight:800;box-shadow:0 14px 32px rgba(15,23,42,.18)}.status-a{left:4%;top:18%}.status-b{right:0;top:28%}.status-c{left:8%;bottom:16%}.status-d{right:6%;bottom:8%}
.node-overview{margin-top:-34px;position:relative;z-index:3}.node-grid{display:grid;gap:16px}.node-card,.feature-card,.risk-card,.faq-item,.step-card,.policy-card,.tip-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 28px rgba(15,23,42,.05)}.node-card{padding:22px}.node-card b,.feature-card h3,.risk-card h3,.step-card h3,.policy-card h3,.tip-card h3{color:var(--deep)}.node-card small{display:inline-flex;margin-bottom:10px;color:var(--blue);font-weight:800}.node-card p{color:var(--muted);margin:8px 0 12px}.text-link{display:inline-flex;align-items:center;color:var(--blue);font-weight:800}.text-link:after{content:"→";margin-left:6px}
.split-section{display:grid;gap:28px;align-items:center}.image-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:18px;box-shadow:var(--shadow)}.image-panel img{width:100%;border-radius:24px;object-fit:cover}.content-panel h2{font-size:30px;line-height:1.25;margin:8px 0 14px;color:var(--deep)}.content-panel p{color:var(--muted);margin:0 0 14px}.feature-list{display:grid;gap:10px;margin:18px 0}.feature-list span{display:flex;gap:10px;align-items:flex-start;color:#475467}.feature-list span:before{content:"";width:9px;height:9px;flex:0 0 9px;border-radius:50%;background:var(--blue);margin-top:10px}.global-nodes-section{position:relative;background:linear-gradient(135deg,#f7faff 0%,#fff 46%,#f8f4ff 100%);overflow:hidden}.global-nodes-section:before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle,#2980FE 1px,transparent 2px);background-size:38px 38px;opacity:.18}.map-card{position:relative;z-index:1;background:rgba(255,255,255,.82);border:1px solid rgba(226,232,240,.9);border-radius:32px;padding:22px;box-shadow:var(--shadow)}.line-card{display:grid;gap:12px;margin-top:16px}.line-card span{padding:12px 14px;border-radius:16px;background:#f3f7ff;color:#344054;font-weight:700}.high-speed-section{background:#f7f9fc}.speed-grid{display:grid;gap:16px}.speed-meter{background:#fff;border:1px solid var(--line);border-radius:26px;padding:18px}.speed-meter strong{display:block;color:var(--deep);font-size:22px;margin-bottom:8px}.bar{height:10px;border-radius:999px;background:#e9eef8;overflow:hidden}.bar i{display:block;height:100%;background:var(--blue);border-radius:inherit}.privacy-protection-section{background:#fff}.safety-panel{background:linear-gradient(180deg,#fff 0%,#f8fbff 100%);border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.privacy-tags span{padding:8px 12px;border-radius:999px;background:#edf5ff;color:var(--blue);font-weight:800;font-size:13px}.no-log-policy-section{background:#f8fbff}.policy-grid{display:grid;gap:16px}.policy-card{padding:22px}.multi-device-section .device-row{display:grid;grid-template-columns:1fr;gap:12px;margin-top:16px}.device-row span{padding:14px;border-radius:18px;background:#f4f7fb;color:#344054;text-align:center;font-weight:800}.encryption-protocol-section{background:#fff}.tech-panel{background:#0f172a;color:#fff;border-radius:32px;padding:24px;box-shadow:0 22px 50px rgba(15,23,42,.18)}.tech-panel p{color:#d4d9e5}.protocol-grid{display:grid;gap:14px;margin-top:18px}.protocol-grid div{padding:16px;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:rgba(255,255,255,.06)}
.process-steps{display:grid;gap:16px}.step-card{padding:20px}.step-no{display:inline-flex;width:38px;height:38px;border-radius:14px;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:900;margin-bottom:10px}.risk-grid{display:grid;gap:16px}.risk-card{padding:20px;border-left:4px solid var(--blue)}.risk-card p{color:var(--muted);margin:8px 0}.risk-card strong{display:block;color:#344054;margin-top:10px}.faq-list{display:grid;gap:14px}.faq-item{padding:20px}.faq-item h3{margin:0 0 8px;color:var(--deep);font-size:18px}.faq-item p{margin:0;color:var(--muted)}.cta-section{padding:64px 0;background:var(--gradient);color:#fff;text-align:center;position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;inset:-40%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 38%);opacity:.5}.cta-inner{position:relative;z-index:1;max-width:760px;margin:0 auto}.cta-inner h2{font-size:32px;line-height:1.2;margin:0 0 12px}.cta-inner p{color:rgba(255,255,255,.88);margin:0 0 24px}.page-hero{padding:48px 0;background:linear-gradient(180deg,#f7faff 0%,#fff 100%);border-bottom:1px solid var(--line)}.page-hero h1{font-size:34px;line-height:1.2;color:var(--deep);margin:14px 0}.page-hero p{max-width:760px;color:var(--muted);margin:0}.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)}.article-card h2{color:var(--deep);font-size:24px;margin:8px 0 12px}.article-card p{color:var(--muted);margin:0 0 14px}.article-card ul,.article-card ol{margin:12px 0 18px;padding-left:22px;color:#475467}.sidebar-card{background:#f8fbff;border:1px solid var(--line);border-radius:26px;padding:20px}.sidebar-card a{display:block;padding:10px 0;color:var(--blue);font-weight:800;border-bottom:1px solid #e6edf8}.sidebar-card a:last-child{border-bottom:0}.check-grid{display:grid;gap:12px;margin:16px 0}.check-grid div{padding:14px;border-radius:18px;background:#f7f9fc;border:1px solid var(--line)}.download-page .download-box{text-align:center;background:#fff;border:1px solid var(--line);border-radius:32px;padding:30px;box-shadow:var(--shadow);margin:24px 0}.download-page .process-steps{margin-top:24px}.site-footer{background:#111827;color:#d1d5db;padding:46px 0 0}.footer-grid{display:grid;gap:26px}.site-footer h3{color:#fff;margin:0 0 12px}.site-footer p{color:#aeb6c5;margin:12px 0 0}.site-footer a{display:block;color:#d1d5db;margin:8px 0}.footer-logo{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding:16px;text-align:center;color:#aeb6c5}.footer-bottom p{margin:0}
@media (min-width:640px){.node-grid,.policy-grid,.speed-grid,.risk-grid,.process-steps{grid-template-columns:repeat(2,1fr)}.multi-device-section .device-row{grid-template-columns:repeat(3,1fr)}.hero-copy h1{font-size:46px}.page-hero h1{font-size:42px}.section-title h2,.content-panel h2{font-size:36px}}
@media (min-width:900px){.nav-toggle-label{display:none}.site-nav{position:static;display:flex!important;flex-direction:row;align-items:center;gap:2px;background:transparent;border:0;box-shadow:none;padding:0}.site-nav a{padding:8px 10px}.hero-inner,.split-section,.content-layout{grid-template-columns:1.04fr .96fr}.hero-copy h1{font-size:58px}.node-grid{grid-template-columns:repeat(4,1fr)}.speed-grid{grid-template-columns:repeat(3,1fr)}.policy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.faq-list{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.article-card{padding:34px}.section{padding:86px 0}.content-layout{grid-template-columns:minmax(0,1fr) 300px}}
@media (min-width:1120px){.site-nav a{padding:8px 12px}.hero-inner{grid-template-columns:1fr .88fr}.process-steps{grid-template-columns:repeat(6,1fr)}.process-steps .step-card{padding:18px}}