:root{
  --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --blue:#2980FE;
  --blue-hover:#1768E8;
  --text:#1f2937;
  --muted:#667085;
  --soft:#f5f7fb;
  --line:#e5eaf2;
  --card:#ffffff;
  --deep:#111827;
  --radius:24px;
  --shadow:0 18px 45px rgba(34,55,90,.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% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(229,234,242,.9)}
.header-inner{width:min(1120px,calc(100% - 24px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:16px}
.logo,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#18243d;letter-spacing:.5px}
.logo img,.footer-brand img{width:36px;height:36px;border-radius:12px;object-fit:cover}
.logo span{font-size:20px}
.site-nav{display:none;position:absolute;left:12px;right:12px;top:68px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:12px;flex-direction:column}
.site-nav.is-open{display:flex}
.site-nav a{padding:10px 12px;border-radius:12px;color:#344054;font-size:15px}
.site-nav a:hover{background:#f3f6ff;color:var(--blue)}
.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:12px;width:42px;height:42px;font-size:22px;color:#28364f}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 24px;border-radius:999px;background:var(--blue);color:#fff;font-weight:700;box-shadow:0 12px 28px rgba(41,128,254,.28);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-hover);transform:translateY(-1px)}
.section{padding:56px 0}
.section.soft{background:var(--soft)}
.section-title{font-size:30px;line-height:1.25;margin:0 0 14px;color:#111827;letter-spacing:-.5px}
.section-lead{margin:0 0 24px;color:var(--muted);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-weight:700;font-size:13px;margin-bottom:14px}
.vpn-network-hero{position:relative;background:var(--gradient);color:#fff;overflow:hidden}
.vpn-network-hero:before,.vpn-network-hero:after{content:"";position:absolute;border-radius:999px;background:rgba(255,255,255,.20);filter:blur(4px)}
.vpn-network-hero:before{width:360px;height:360px;right:-120px;top:-80px}.vpn-network-hero:after{width:240px;height:240px;left:-90px;bottom:-80px}
.hero-grid{position:relative;z-index:1;display:grid;gap:28px;padding:64px 0 72px;align-items:center}
.hero-content h1{font-size:38px;line-height:1.12;margin:0 0 18px;letter-spacing:-1px}
.hero-content p{font-size:17px;margin:0 0 24px;color:rgba(255,255,255,.88)}
.hero-tags,.status-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-tags span,.status-pills span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);padding:8px 12px;border-radius:999px;font-size:13px;color:#fff}
.hero-visual{position:relative;min-height:280px;border-radius:32px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);box-shadow:0 24px 80px rgba(28,38,82,.22);padding:24px;display:grid;place-items:center;overflow:hidden}
.hero-visual:before{content:"";position:absolute;inset:22px;border:1px dashed rgba(255,255,255,.35);border-radius:28px}
.hero-visual img{position:relative;z-index:2;max-height:330px;object-fit:contain}
.float-card{position:absolute;z-index:3;background:rgba(255,255,255,.92);color:#25324a;padding:9px 13px;border-radius:16px;box-shadow:0 12px 30px rgba(23,35,72,.18);font-size:13px;font-weight:700}
.float-card.one{left:18px;top:22px}.float-card.two{right:18px;top:70px}.float-card.three{left:24px;bottom:36px}.float-card.four{right:24px;bottom:24px}
.node-overview{margin-top:-34px;position:relative;z-index:3}.node-grid{display:grid;gap:16px}.node-card,.feature-card,.risk-card,.faq-item,.policy-card,.step-card,.info-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 28px rgba(35,52,85,.06)}
.node-card b{display:inline-block;background:#eef5ff;color:var(--blue);padding:4px 10px;border-radius:999px;margin-bottom:10px;font-size:13px}.node-card h3,.feature-card h3,.risk-card h3,.policy-card h3,.step-card h3,.info-card h3{margin:0 0 8px;font-size:20px;color:#172033}.node-card p,.feature-card p,.risk-card p,.policy-card p,.step-card p,.info-card p{margin:0;color:var(--muted)}
.text-link{display:inline-flex;margin-top:12px;color:var(--blue);font-weight:700}.text-link:hover{color:var(--blue-hover)}
.split-section,.vpn-connection-section,.high-speed-section,.privacy-protection-section,.multi-device-section,.encryption-protocol-section{display:grid;gap:26px;align-items:center}.visual-card{background:#fff;border:1px solid var(--line);border-radius:32px;padding:22px;box-shadow:var(--shadow);position:relative;overflow:hidden}.visual-card.alt{background:#f7faff}.visual-card img{margin:auto;max-height:360px;object-fit:contain}.feature-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}.feature-list li{background:#f6f8fc;border:1px solid var(--line);border-radius:16px;padding:12px 14px;color:#4b5563}.feature-list li strong{color:#1d2b4a}
.global-nodes-section{position:relative;background:linear-gradient(135deg,#f6f9ff,#ffffff);border-radius:34px;border:1px solid var(--line);padding:28px;overflow:hidden}.global-nodes-section:before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 18% 30%, rgba(41,128,254,.18) 0 4px, transparent 5px),radial-gradient(circle at 72% 20%, rgba(123,78,241,.18) 0 4px, transparent 5px),radial-gradient(circle at 54% 74%, rgba(184,77,218,.18) 0 4px, transparent 5px);background-size:100% 100%;pointer-events:none}.global-content{position:relative;z-index:1;display:grid;gap:24px;align-items:center}.line-card{display:grid;gap:12px}.line-card span{display:flex;justify-content:space-between;gap:14px;padding:13px 14px;background:#fff;border:1px solid var(--line);border-radius:16px;color:#42526b}.speed-bars{display:grid;gap:12px;margin-top:18px}.speed-bars div{height:12px;border-radius:999px;background:linear-gradient(90deg,#dcebff,#2980FE);width:var(--w)}
.privacy-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.privacy-tags span{padding:8px 12px;border-radius:999px;background:#eef5ff;color:#2f6fe9;font-weight:700;font-size:13px}.policy-grid,.risk-grid,.faq-grid,.detail-card-grid{display:grid;gap:16px}.policy-card{border-top:4px solid var(--blue)}.device-grid{display:grid;gap:14px;margin-top:18px}.device-pill{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;font-weight:700;color:#25324a}.protocol-panel{background:#111827;color:#fff;border-radius:30px;padding:24px;position:relative;overflow:hidden}.protocol-panel:before{content:"";position:absolute;right:-80px;top:-80px;width:220px;height:220px;background:rgba(41,128,254,.25);border-radius:999px}.protocol-panel p{color:rgba(255,255,255,.76)}.protocol-list{position:relative;display:grid;gap:12px;margin-top:18px}.protocol-list span{padding:12px 14px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);border-radius:16px}.process-steps{display:grid;gap:16px}.step-card .num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;margin-bottom:12px}.risk-card{border-left:4px solid var(--blue)}.risk-card small{display:block;margin-top:10px;color:#344054;background:#f6f8fc;border-radius:12px;padding:10px}.faq-item h3{font-size:18px;margin:0 0 8px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{background:var(--gradient);color:#fff;text-align:center;padding:56px 20px;border-radius:34px;overflow:hidden;position:relative}.cta-section h2{margin:0 0 12px;font-size:30px}.cta-section p{max-width:680px;margin:0 auto 24px;color:rgba(255,255,255,.86)}.cta-section .download-btn{background:var(--blue)}
.page-hero{padding:54px 0 32px;background:linear-gradient(180deg,#f4f7ff,#fff)}.page-hero h1{font-size:34px;line-height:1.22;margin:0 0 12px;color:#111827}.page-hero p{margin:0;color:var(--muted);max-width:760px}.detail-layout{display:grid;gap:24px;align-items:start}.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:0 12px 34px rgba(35,52,85,.06)}.article-card h2{font-size:24px;margin:0 0 12px;color:#111827}.article-card p{color:#4b5563;margin:0 0 16px}.side-panel{background:#f7faff;border:1px solid var(--line);border-radius:24px;padding:22px;position:sticky;top:92px}.side-panel h3{margin:0 0 10px}.check-list{display:grid;gap:10px;margin:14px 0 0;padding:0;list-style:none}.check-list li{padding:10px 12px;background:#fff;border:1px solid var(--line);border-radius:14px;color:#475467}.download-area{margin-top:24px}.notice-box{background:#f7faff;border:1px solid #dbe8ff;border-radius:20px;padding:18px;margin:20px 0;color:#44546f}.steps-list{counter-reset:item;display:grid;gap:12px;margin:18px 0;padding:0;list-style:none}.steps-list li{counter-increment:item;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 14px 14px 52px;position:relative}.steps-list li:before{content:counter(item);position:absolute;left:14px;top:14px;width:26px;height:26px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800}.site-footer{margin-top:56px;background:#111827;color:#d1d5db;padding:48px 0 0}.footer-grid{display:grid;gap:26px}.site-footer h3{color:#fff;margin:0 0 12px}.site-footer a{display:block;color:#cbd5e1;margin:8px 0}.site-footer a:hover{color:#fff}.footer-brand{color:#fff;margin-bottom:12px}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding:18px;color:#9ca3af;font-size:14px}
@media (min-width:700px){.node-grid{grid-template-columns:repeat(2,1fr)}.policy-grid,.risk-grid,.faq-grid,.detail-card-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.device-grid{grid-template-columns:repeat(3,1fr)}}
@media (min-width:960px){.nav-toggle{display:none}.site-nav{position:static;display:flex;flex-direction:row;background:transparent;border:0;box-shadow:none;padding:0;gap:2px}.site-nav a{font-size:14px}.hero-grid{grid-template-columns:1.03fr .97fr;padding:86px 0 92px}.hero-content h1{font-size:56px}.hero-content p{font-size:19px}.node-grid{grid-template-columns:repeat(4,1fr)}.split-section,.vpn-connection-section,.high-speed-section,.privacy-protection-section,.multi-device-section,.encryption-protocol-section,.global-content{grid-template-columns:1fr 1fr}.section{padding:78px 0}.section-title{font-size:38px}.policy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.detail-layout{grid-template-columns:minmax(0,1fr) 320px}.footer-grid{grid-template-columns:1.3fr .8fr .8fr .8fr}.page-hero h1{font-size:44px}}
@media (max-width:420px){.container{width:min(100% - 24px,1120px)}.hero-content h1{font-size:32px}.section-title{font-size:26px}.page-hero h1{font-size:30px}.float-card{font-size:12px;padding:7px 10px}.download-btn{width:100%;padding-left:18px;padding-right:18px}.article-card{padding:20px}.cta-section{border-radius:26px}.site-nav{left:8px;right:8px}}