:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#64748b;
    --soft:#f6f8fc;
    --line:#e5eaf3;
    --white:#ffffff;
    --deep:#111827;
    --radius:24px;
    --shadow:0 18px 45px rgba(30,64,175,.10);
}
*{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;background:#fff;color:var(--text);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(226,232,240,.9)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#172554;letter-spacing:.02em}
.logo{width:38px;height:38px;border-radius:12px;object-fit:cover;box-shadow:0 8px 20px rgba(41,128,254,.22)}
.site-nav{position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:10px;display:none;grid-template-columns:1fr 1fr;gap:6px}
.site-nav a{padding:10px 12px;border-radius:12px;color:#475569;font-size:14px}
.site-nav a:hover{background:#eff6ff;color:var(--blue)}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-toggle-label{width:42px;height:42px;border:1px solid var(--line);border-radius:13px;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:#1f2937;border-radius:999px}
.nav-toggle:checked ~ .site-nav{display:grid}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 24px;background:var(--blue);color:#fff!important;border-radius:999px;font-weight:800;box-shadow:0 14px 30px rgba(41,128,254,.30);transition:.22s ease;white-space:nowrap;border:0}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 18px 38px rgba(23,104,232,.32)}
.section{padding:64px 0}
.section-soft{background:var(--soft)}
.section-title{font-size:28px;line-height:1.2;margin:0 0 14px;color:#111827;letter-spacing:-.03em}
.section-lead{margin:0 0 26px;color:var(--muted);font-size:16px;max-width:760px}
.eyebrow,.category-badge{display:inline-flex;align-items:center;gap:6px;margin-bottom:12px;padding:6px 12px;border-radius:999px;background:#eff6ff;color:var(--blue);font-weight:800;font-size:13px}
.link-more{display:inline-flex;color:var(--blue);font-weight:800;margin-top:10px}
.link-more:hover{color:var(--blue-dark)}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--gradient);color:#fff;padding:64px 0 44px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 18% 18%,rgba(255,255,255,.22),transparent 28%),radial-gradient(circle at 80% 10%,rgba(255,255,255,.18),transparent 22%),linear-gradient(135deg,rgba(255,255,255,.14) 1px,transparent 1px);background-size:auto,auto,46px 46px;opacity:.9}
.vpn-network-hero:after{content:"";position:absolute;width:560px;height:560px;border:1px solid rgba(255,255,255,.24);border-radius:50%;right:-180px;top:-150px;box-shadow:0 0 0 52px rgba(255,255,255,.05),0 0 0 105px rgba(255,255,255,.04)}
.hero-grid{position:relative;z-index:1;display:grid;gap:34px;align-items:center}
.hero-copy h1{font-size:42px;line-height:1.12;margin:0 0 18px;letter-spacing:-.045em;color:#fff}
.hero-copy p{font-size:17px;margin:0 0 24px;color:rgba(255,255,255,.88);max-width:690px}
.hero-tags,.floating-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.hero-tags span,.floating-tags span{display:inline-flex;align-items:center;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);padding:8px 12px;color:#fff;font-size:13px;font-weight:700}
.hero-visual{position:relative;min-height:300px;display:flex;align-items:center;justify-content:center}
.hero-device{position:relative;width:min(450px,100%);padding:18px;border-radius:32px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.28);box-shadow:0 30px 80px rgba(17,24,39,.18);backdrop-filter:blur(10px)}
.hero-device img{border-radius:24px;box-shadow:0 24px 65px rgba(15,23,42,.24)}
.status-card{position:absolute;background:rgba(255,255,255,.92);color:#1f2937;border-radius:18px;padding:10px 14px;box-shadow:0 16px 34px rgba(15,23,42,.18);font-size:13px;font-weight:800;border:1px solid rgba(255,255,255,.6)}
.status-card small{display:block;color:var(--blue);font-size:11px;font-weight:900;line-height:1.2}
.status-one{top:6px;left:0}.status-two{right:0;top:52px}.status-three{bottom:34px;left:8px}.status-four{bottom:0;right:16px}
.node-overview{margin-top:-22px;position:relative;z-index:3}
.overview-grid{display:grid;grid-template-columns:1fr;gap:14px}
.node-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
.node-card .tag{display:inline-flex;margin-bottom:14px;padding:4px 10px;border-radius:999px;background:#eff6ff;color:var(--blue);font-size:12px;font-weight:800}
.node-card h3{margin:0 0 8px;color:#111827;font-size:18px}.node-card p{margin:0;color:var(--muted);font-size:14px}
.feature-split{display:grid;gap:28px;align-items:center}.feature-split.reverse .feature-media{order:0}.feature-split.reverse .feature-copy{order:1}
.feature-copy h2,.panel-copy h2{font-size:30px;line-height:1.22;margin:0 0 14px;color:#111827;letter-spacing:-.03em}.feature-copy p,.panel-copy p{color:var(--muted);margin:0 0 16px}
.feature-list{display:grid;gap:10px;margin:22px 0;padding:0;list-style:none}.feature-list li{position:relative;padding-left:30px;color:#334155}.feature-list li:before{content:"";position:absolute;left:0;top:10px;width:10px;height:10px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 6px #e8f1ff}
.feature-media{background:#fff;border:1px solid var(--line);border-radius:30px;padding:16px;box-shadow:var(--shadow)}
.vpn-connection-section,.global-nodes-section,.high-speed-section,.privacy-protection-section,.no-log-policy-section,.multi-device-section,.encryption-protocol-section{position:relative}
.global-nodes-section{background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);overflow:hidden}
.global-nodes-section:before{content:"";position:absolute;inset:28px 0 auto 0;height:300px;background:radial-gradient(circle at 30% 45%,rgba(41,128,254,.12),transparent 26%),radial-gradient(circle at 72% 28%,rgba(123,78,241,.11),transparent 24%);pointer-events:none}
.map-panel{position:relative;display:grid;gap:18px;padding:22px;border-radius:30px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
.map-dots{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.map-dot{padding:14px;border-radius:18px;border:1px solid var(--line);background:#f8fafc}.map-dot strong{display:block;color:#0f172a}.map-dot span{color:var(--muted);font-size:13px}
.speed-panel{display:grid;gap:14px}.speed-line{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}.speed-line strong{display:flex;justify-content:space-between;color:#0f172a}.speed-bar{height:8px;border-radius:999px;background:#e6eefb;overflow:hidden;margin-top:12px}.speed-bar i{display:block;height:100%;border-radius:999px;background:var(--blue)}
.privacy-panel{display:grid;gap:14px}.privacy-card{padding:18px;border-radius:20px;border:1px solid var(--line);background:#fff}.privacy-card strong{display:block;color:#0f172a;margin-bottom:6px}.privacy-card p{margin:0;color:var(--muted)}
.info-cards{display:grid;grid-template-columns:1fr;gap:16px}.info-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 34px rgba(15,23,42,.06)}.info-card h3{margin:0 0 8px;color:#111827}.info-card p{margin:0;color:var(--muted)}
.device-grid{display:grid;grid-template-columns:1fr;gap:14px}.device-card{padding:18px;border-radius:22px;background:#fff;border:1px solid var(--line)}.device-card span{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:14px;background:#eff6ff;color:var(--blue);font-weight:900;margin-bottom:10px}.device-card h3{margin:0 0 6px}.device-card p{margin:0;color:var(--muted)}
.tech-panel{background:#111827;color:#fff;border-radius:30px;padding:24px;box-shadow:0 24px 60px rgba(17,24,39,.18)}.tech-panel h3{margin:0 0 14px}.tech-row{display:flex;justify-content:space-between;gap:14px;border-top:1px solid rgba(255,255,255,.12);padding:14px 0;color:#dbeafe}.tech-row:first-of-type{border-top:0}.tech-row span:last-child{color:#93c5fd;font-weight:800;text-align:right}
.process-steps{display:grid;grid-template-columns:1fr;gap:14px}.step-card{position:relative;padding:22px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(15,23,42,.06)}.step-number{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;background:var(--blue);color:#fff;border-radius:12px;font-weight:900;margin-bottom:10px}.step-card h3{margin:0 0 8px}.step-card p{margin:0;color:var(--muted)}
.safety-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:22px;box-shadow:var(--shadow)}
.risk-grid{display:grid;grid-template-columns:1fr;gap:14px}.risk-card{border:1px solid var(--line);border-left:4px solid var(--blue);background:#fff;border-radius:18px;padding:18px}.risk-card h3{margin:0 0 6px;font-size:17px}.risk-card p{margin:0 0 8px;color:var(--muted);font-size:14px}.risk-card strong{color:#0f172a;font-size:14px}
.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}.faq-item h3{margin:0 0 8px;color:#111827;font-size:18px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{background:var(--gradient);color:#fff;text-align:center;position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(255,255,255,.18),transparent 26%),radial-gradient(circle at 80% 0,rgba(255,255,255,.18),transparent 25%)}.cta-inner{position:relative;z-index:1;max-width:760px;margin:0 auto}.cta-inner h2{margin:0 0 12px;font-size:30px}.cta-inner p{margin:0 0 22px;color:rgba(255,255,255,.86)}
.page-hero{padding:58px 0 34px;background:linear-gradient(180deg,#f8fbff 0%,#fff 100%)}.page-hero h1{font-size:34px;line-height:1.18;margin:0 0 14px;color:#0f172a;letter-spacing:-.03em}.page-hero p{margin:0;color:var(--muted);max-width:820px;font-size:17px}.page-layout{display:grid;gap:26px;align-items:start;padding:26px 0 64px}.article-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:var(--shadow)}.article-card h2{margin:0 0 12px;font-size:24px;color:#111827}.article-card p{color:#475569;margin:0 0 16px}.article-card p:last-child{margin-bottom:0}.check-list,.number-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}.check-list li,.number-list li{padding:14px 16px;border-radius:16px;background:#f8fafc;border:1px solid var(--line);color:#334155}.number-list{counter-reset:step}.number-list li{counter-increment:step}.number-list li:before{content:counter(step);display:inline-flex;width:26px;height:26px;align-items:center;justify-content:center;border-radius:9px;background:var(--blue);color:#fff;font-weight:900;margin-right:10px}.side-panel{display:grid;gap:16px}.tip-box{border-radius:22px;border:1px solid var(--line);background:#fff;padding:20px}.tip-box h3{margin:0 0 10px;color:#111827}.tip-box p,.tip-box li{color:var(--muted);margin:0}.tip-box ul{margin:0;padding-left:18px;display:grid;gap:8px}.page-download{margin-top:22px}
.download-steps{display:grid;gap:14px;margin-top:24px}.download-step{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line);border-radius:18px;background:#fff;padding:16px}.download-step span{flex:0 0 32px;width:32px;height:32px;border-radius:12px;background:#eff6ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900}.download-step h3{margin:0 0 4px}.download-step p{margin:0;color:var(--muted)}
.about-timeline{display:grid;gap:16px}.about-item{padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line)}.about-item h2{margin:0 0 8px;font-size:22px}.about-item p{margin:0;color:var(--muted)}
.site-footer{background:#0f172a;color:#cbd5e1;padding:48px 0 0}.footer-grid{display:grid;grid-template-columns:1fr;gap:28px}.footer-brand{color:#fff;margin-bottom:12px}.footer-brand img{width:34px;height:34px;border-radius:10px}.site-footer h3{color:#fff;margin:0 0 12px}.site-footer p{margin:0;color:#94a3b8}.site-footer a:not(.footer-brand){display:block;color:#cbd5e1;margin:8px 0}.site-footer a:hover{color:#fff}.footer-bottom{margin-top:34px;padding:18px;text-align:center;border-top:1px solid rgba(255,255,255,.1);color:#94a3b8;font-size:14px}
@media (min-width:640px){.overview-grid{grid-template-columns:repeat(2,1fr)}.info-cards{grid-template-columns:repeat(2,1fr)}.device-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.risk-grid{grid-template-columns:repeat(2,1fr)}.download-steps{grid-template-columns:repeat(2,1fr)}.page-hero h1{font-size:42px}}
@media (min-width:920px){.site-nav{position:static;display:flex!important;align-items:center;justify-content:flex-end;background:transparent;border:0;box-shadow:none;padding:0;gap:2px}.site-nav a{font-size:14px}.nav-toggle-label{display:none}.vpn-network-hero{padding:92px 0 64px}.hero-grid{grid-template-columns:1.04fr .96fr;gap:54px}.hero-copy h1{font-size:58px}.hero-copy p{font-size:18px}.overview-grid{grid-template-columns:repeat(4,1fr)}.section{padding:86px 0}.feature-split{grid-template-columns:1fr 1fr;gap:54px}.feature-split.reverse .feature-media{order:2}.feature-split.reverse .feature-copy{order:1}.map-panel{grid-template-columns:1fr .9fr;align-items:center;padding:34px}.info-cards{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(4,1fr)}.page-layout{grid-template-columns:minmax(0,1fr) 320px;gap:34px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}.section-title{font-size:38px}.feature-copy h2,.panel-copy h2{font-size:38px}.cta-inner h2{font-size:40px}}
@media (min-width:1160px){.hero-copy h1{font-size:64px}.process-steps{grid-template-columns:repeat(6,1fr)}.process-steps .step-card{padding:18px}.process-steps .step-card p{font-size:14px}}
@media (max-width:420px){.container{width:min(100% - 24px,1120px)}.header-inner{width:min(100% - 20px,1180px)}.brand span{font-size:15px}.hero-copy h1{font-size:36px}.section-title,.feature-copy h2,.panel-copy h2{font-size:26px}.status-card{position:static;margin:8px;display:inline-block}.hero-device{padding:12px}.hero-visual{display:block;min-height:auto}.download-btn{width:100%}.page-hero h1{font-size:30px}}