:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --soft:#f5f7fb;
    --soft-blue:#eef5ff;
    --border:#e5eaf2;
    --white:#ffffff;
    --shadow:0 18px 50px rgba(18, 36, 77, .10);
    --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;font-size:16px;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,.85)}
.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#18223a;font-size:19px}
.logo,.footer-brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.main-nav{display:none;align-items:center;gap:8px;flex-wrap:wrap}
.main-nav a{padding:9px 13px;border-radius:999px;color:#4b5563;font-size:15px;font-weight:650}
.main-nav a:hover,.main-nav a.active{background:#eef5ff;color:var(--blue)}
.nav-toggle{border:1px solid var(--border);background:#fff;color:#1f2937;border-radius:999px;padding:8px 13px;font-weight:700}
.main-nav.is-open{display:flex;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);border-radius:20px;padding:14px;flex-direction:column;align-items:stretch}
.main-nav.is-open a{text-align:center}
.section{padding:64px 0}
.section.alt{background:var(--soft)}
.section-title{max-width:760px;margin:0 auto 28px;text-align:center}
.section-title .eyebrow,.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;padding:5px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-weight:800;font-size:13px}
h1,h2,h3{line-height:1.22;margin:0 0 14px;color:#18223a}
h1{font-size:clamp(34px,7vw,62px);letter-spacing:-.04em}
h2{font-size:clamp(26px,4vw,40px);letter-spacing:-.03em}
h3{font-size:21px}
p{margin:0 0 16px;color:var(--muted)}
.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 28px rgba(41,128,254,.28);transition:.2s ease;white-space:nowrap}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.link-arrow{color:var(--blue);font-weight:800;display:inline-flex;align-items:center;gap:6px;margin-top:6px}
.link-arrow:after{content:"→"}
.vpn-network-hero{position:relative;overflow:hidden;color:#fff;background:var(--gradient);padding:76px 0 66px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(255,255,255,.28),transparent 24%),radial-gradient(circle at 84% 10%,rgba(255,255,255,.18),transparent 22%),linear-gradient(135deg,rgba(255,255,255,.12) 1px,transparent 1px);background-size:auto,auto,34px 34px;opacity:.75}
.hero-grid{position:relative;z-index:1;display:grid;gap:34px;align-items:center}
.hero-content p,.vpn-network-hero h1{color:#fff}
.hero-content .summary{font-size:18px;max-width:620px;color:rgba(255,255,255,.88)}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0 28px}
.hero-tags span,.status-badge{display:inline-flex;padding:8px 12px;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.14);border-radius:999px;color:#fff;font-size:14px;font-weight:700;backdrop-filter:blur(10px)}
.hero-visual{position:relative;min-height:300px;display:grid;place-items:center}
.hero-device{position:relative;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);border-radius:32px;padding:22px;box-shadow:0 28px 70px rgba(20,22,70,.28);backdrop-filter:blur(14px)}
.hero-device img{border-radius:24px;max-height:430px;object-fit:contain;margin:auto}
.float-card{position:absolute;background:rgba(255,255,255,.92);color:#1f2937;border:1px solid rgba(255,255,255,.65);box-shadow:0 16px 40px rgba(19,32,80,.16);border-radius:18px;padding:12px 14px;font-weight:800;font-size:14px}
.float-card small{display:block;color:var(--muted);font-weight:600;font-size:12px}
.float-card.one{left:0;top:34px}.float-card.two{right:0;top:90px}.float-card.three{left:24px;bottom:42px}.float-card.four{right:12px;bottom:10px}
.node-overview{margin-top:-40px;position:relative;z-index:2}
.node-overview-grid{display:grid;gap:16px}
.node-card,.feature-card,.risk-card,.faq-item,.step-card,.info-card,.page-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:0 12px 34px rgba(32,45,77,.06)}
.node-card .tag,.category-badge{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:13px;font-weight:800;margin-bottom:12px}
.split-section{display:grid;gap:28px;align-items:center}
.media-card{background:#fff;border:1px solid var(--border);border-radius:32px;padding:18px;box-shadow:var(--shadow)}
.media-card img{border-radius:24px;margin:auto;max-height:430px;object-fit:contain}
.check-list{display:grid;gap:12px;margin:20px 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:30px;color:#475467}
.check-list li:before{content:"";position:absolute;left:0;top:.55em;width:16px;height:16px;border-radius:50%;background:var(--blue);box-shadow:inset 0 0 0 5px #fff;border:2px solid var(--blue)}
.global-nodes-section{background:linear-gradient(180deg,#fff 0,#f4f8ff 100%)}
.map-panel{position:relative;overflow:hidden;border-radius:32px;background:#fff;border:1px solid var(--border);padding:26px;box-shadow:var(--shadow)}
.map-panel:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 35%,rgba(41,128,254,.22),transparent 9%),radial-gradient(circle at 75% 45%,rgba(123,78,241,.18),transparent 12%),radial-gradient(circle at 50% 70%,rgba(184,77,218,.16),transparent 11%),linear-gradient(115deg,transparent 48%,rgba(41,128,254,.16) 49%,transparent 50%);opacity:.9}
.map-panel>*{position:relative;z-index:1}
.node-lines{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px}
.node-lines span{background:#f7f9fc;border:1px solid var(--border);border-radius:18px;padding:14px;color:#475467;font-weight:700}
.high-speed-section{background:#f6f9fe}
.speed-board{display:grid;gap:14px}
.speed-row{background:#fff;border:1px solid var(--border);border-radius:20px;padding:16px;display:flex;justify-content:space-between;gap:16px;color:#475467;font-weight:800}
.speed-row i{display:block;height:8px;border-radius:999px;background:linear-gradient(90deg,#dbeafe,#2980FE);width:42%;margin-top:10px}
.privacy-protection-section .privacy-panel{display:grid;gap:16px;background:#fff;border:1px solid var(--border);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}.privacy-tags span{background:#f3f6fb;border:1px solid var(--border);border-radius:999px;padding:7px 11px;color:#344054;font-weight:750}
.no-log-policy-section .policy-grid,.feature-grid,.risk-grid,.faq-grid{display:grid;gap:16px}
.policy-card{background:#fff;border:1px solid var(--border);border-radius:24px;padding:22px;box-shadow:0 10px 30px rgba(32,45,77,.06)}
.multi-device-section{background:linear-gradient(180deg,#fff 0,#f8fafc 100%)}
.device-stack{display:grid;gap:14px}.device-card{background:#fff;border:1px solid var(--border);border-radius:22px;padding:18px;display:flex;gap:14px;align-items:flex-start}.device-icon{width:42px;height:42px;border-radius:14px;background:#eef5ff;color:var(--blue);display:grid;place-items:center;font-weight:900;flex:0 0 auto}
.encryption-protocol-section .tech-panel{border-radius:32px;background:#172554;color:#fff;padding:24px;box-shadow:var(--shadow)}
.tech-panel h3,.tech-panel p{color:#fff}.tech-list{display:grid;gap:12px;margin-top:16px}.tech-list div{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-top:50px}.step-card:before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;top:18px;left:22px;color:var(--blue);font-size:18px;font-weight:900}
.risk-card{border-left:4px solid var(--blue)}.risk-card strong{display:block;color:#18223a;margin-bottom:6px}.risk-card span{display:block;color:#667085;margin-top:8px;font-size:14px}
.faq-item details{display:block}.faq-item summary{cursor:pointer;font-weight:850;color:#18223a;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item p{margin:12px 0 0}
.cta-section{padding:70px 0;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% 0,rgba(255,255,255,.25),transparent 20%),radial-gradient(circle at 80% 50%,rgba(255,255,255,.18),transparent 24%)}.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,.88)}
.page-hero{padding:56px 0 34px;background:linear-gradient(180deg,#f4f8ff 0,#fff 100%)}.page-hero .content{max-width:820px}.page-layout{display:grid;gap:22px;padding:34px 0 70px}.article-body{background:#fff;border:1px solid var(--border);border-radius:30px;padding:24px;box-shadow:var(--shadow)}.article-body h2{font-size:25px;margin-top:24px}.article-body h2:first-child{margin-top:0}.side-panel{display:grid;gap:16px;align-content:start}.tip-box{background:#f8fbff;border:1px solid var(--border);border-radius:22px;padding:18px}.tip-box h3{font-size:18px}.simple-list{margin:0;padding-left:20px;color:#475467}.simple-list li{margin:8px 0}.one-download{margin-top:24px}.download-page-card{max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:32px;box-shadow:var(--shadow);padding:26px}.download-steps{display:grid;gap:14px;margin:24px 0}.download-steps div{border:1px solid var(--border);border-radius:18px;padding:16px;background:#f8fafc}.about-values{display:grid;gap:16px;margin-top:24px}
.site-footer{background:#101828;color:#d0d5dd;padding:52px 0 24px}.site-footer p,.site-footer a,.footer-bottom{color:#b9c0cc}.site-footer h3{color:#fff;font-size:17px}.footer-grid{display:grid;gap:28px}.footer-grid a{display:block;margin:8px 0}.footer-brand{color:#fff;margin-bottom:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;display:flex;gap:12px;justify-content:space-between;flex-wrap:wrap;font-size:14px}
@media (min-width:680px){.node-overview-grid{grid-template-columns:repeat(2,1fr)}.feature-grid,.policy-grid,.risk-grid,.faq-grid,.process-steps,.about-values{grid-template-columns:repeat(2,1fr)}.hero-grid,.split-section{grid-template-columns:1.05fr .95fr}.page-layout{grid-template-columns:1fr 290px}.article-body{padding:34px}.download-page-card{padding:36px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
@media (min-width:980px){.nav-toggle{display:none}.main-nav{display:flex}.node-overview-grid{grid-template-columns:repeat(4,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.hero-visual{min-height:460px}.section{padding:84px 0}.vpn-network-hero{padding:96px 0 90px}.page-hero{padding:76px 0 44px}.page-layout{padding-bottom:92px}}
@media (max-width:420px){.container{width:min(100% - 24px,1120px)}.float-card{position:static;margin:8px;display:inline-block}.hero-visual{display:block}.hero-device{margin-top:8px;padding:14px}.download-btn{width:100%;padding:0 18px}.node-lines{grid-template-columns:1fr}.speed-row{display:block}.page-hero{padding-top:42px}}