:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#64748b;
    --light:#f5f7fb;
    --line:#e5eaf3;
    --panel:#ffffff;
    --soft:#eef5ff;
    --radius:24px;
    --shadow:0 18px 55px rgba(31,41,55,.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;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}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(229,234,243,.9)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#172554;white-space:nowrap}
.brand-logo{width:42px;height:42px;border-radius:14px;object-fit:cover;box-shadow:0 8px 24px rgba(41,128,254,.18)}
.brand-text{font-size:22px;letter-spacing:.04em}
.nav-toggle{display:none}
.nav-toggle-label{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border:1px solid var(--line);border-radius:999px;color:#334155;background:#fff;font-size:14px}
.site-nav{position:absolute;left:14px;right:14px;top:72px;display:none;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:14px}
.nav-toggle:checked~.site-nav{display:flex}
.site-nav a{padding:10px 12px;color:#334155;border-radius:12px;font-weight:600;font-size:14px}
.site-nav a:hover{background:var(--soft);color:var(--blue)}
.nav-download{color:var(--blue)!important;background:#eef5ff}
.section{padding:64px 0}
.section.alt{background:var(--light)}
.section-title{font-size:32px;line-height:1.25;margin:0 0 14px;color:#111827;letter-spacing:-.03em}
.section-desc{color:var(--muted);margin:0 0 26px;max-width:760px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;border-radius:999px;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 12px 28px rgba(41,128,254,.26);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 16px 34px rgba(23,104,232,.28)}
.text-link{display:inline-flex;color:var(--blue);font-weight:800;margin-top:12px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-weight:800;font-size:13px;margin-bottom:12px}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--gradient);color:#fff;padding:70px 0 42px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 14% 20%,rgba(255,255,255,.28),transparent 24%),radial-gradient(circle at 78% 34%,rgba(255,255,255,.18),transparent 28%),linear-gradient(135deg,rgba(255,255,255,.16) 1px,transparent 1px);background-size:auto,auto,42px 42px;opacity:.95}
.vpn-network-hero .container{position:relative;z-index:1;display:grid;gap:34px;align-items:center}
.hero-copy h1{font-size:42px;line-height:1.12;letter-spacing:-.05em;margin:0 0 16px;max-width:720px}
.hero-copy p{font-size:17px;color:rgba(255,255,255,.88);margin:0 0 22px;max-width:670px}
.hero-tags,.floating-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-tags span,.floating-tags span{display:inline-flex;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);color:#fff;font-weight:700;font-size:13px}
.hero-visual{position:relative;min-height:320px;display:grid;place-items:center}
.hero-card{position:relative;width:min(430px,100%);padding:18px;border-radius:32px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.34);box-shadow:0 28px 80px rgba(26,38,92,.26);backdrop-filter:blur(16px)}
.hero-card img{border-radius:24px;width:100%;background:#fff}
.status-card{position:absolute;background:#fff;color:#172554;border-radius:18px;padding:12px 14px;box-shadow:0 16px 40px rgba(15,23,42,.18);font-weight:800;font-size:13px;border:1px solid rgba(226,232,240,.8)}
.status-card.one{left:0;top:20px}.status-card.two{right:2px;top:86px}.status-card.three{left:8px;bottom:54px}.status-card.four{right:16px;bottom:8px}
.node-overview{margin-top:-28px;position:relative;z-index:2}
.overview-grid{display:grid;gap:16px}
.node-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 14px 40px rgba(31,41,55,.08)}
.node-card .mark{display:inline-flex;padding:4px 10px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:12px;font-weight:800;margin-bottom:10px}
.node-card h3{margin:0 0 8px;font-size:19px;color:#111827}.node-card p{margin:0;color:var(--muted)}
.split{display:grid;gap:28px;align-items:center}.split.reverse .media{order:-1}
.media{position:relative;border-radius:30px;padding:18px;background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid var(--line);box-shadow:var(--shadow)}
.media img{border-radius:22px;margin:0 auto}.media.soft{background:#eff6ff}.media.gradient-frame{background:linear-gradient(135deg,#eff6ff,#faf5ff)}
.feature-list{display:grid;gap:10px;margin:22px 0 0;padding:0;list-style:none}
.feature-list li{position:relative;padding-left:28px;color:#475569}.feature-list li:before{content:"";position:absolute;left:0;top:.68em;width:10px;height:10px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #e8f2ff}
.global-nodes-section{background:#f8fbff;position:relative;overflow:hidden}.global-nodes-section:before{content:"";position:absolute;inset:40px 0 auto 0;height:260px;background:radial-gradient(circle at 30% 40%,rgba(41,128,254,.16),transparent 26%),radial-gradient(circle at 68% 34%,rgba(123,78,241,.13),transparent 24%);pointer-events:none}
.map-panel{position:relative;border-radius:30px;border:1px solid var(--line);background:#fff;padding:24px;box-shadow:var(--shadow);overflow:hidden}.map-panel:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent 0 46%,rgba(41,128,254,.08) 47% 49%,transparent 50%),linear-gradient(45deg,transparent 0 42%,rgba(123,78,241,.08) 43% 45%,transparent 46%)}
.map-panel>*{position:relative}.node-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.node-pills span{padding:8px 12px;border-radius:999px;background:#eef5ff;color:#1d4ed8;font-weight:800;font-size:13px}
.speed-cards{display:grid;gap:14px;margin-top:18px}.speed-card{border:1px solid var(--line);background:#fff;border-radius:18px;padding:16px}.speed-card strong{display:block;color:#111827}.speed-card span{color:var(--muted);font-size:14px}
.privacy-panel{border-radius:30px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:24px}.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.privacy-tags span{padding:8px 12px;border-radius:12px;background:#f1f5f9;color:#334155;font-weight:700}
.card-grid{display:grid;gap:16px}.info-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 36px rgba(31,41,55,.06)}.info-card h3{margin:0 0 10px;color:#111827}.info-card p{margin:0;color:var(--muted)}
.device-row{display:grid;gap:14px}.device-chip{display:flex;justify-content:space-between;gap:14px;align-items:center;border:1px solid var(--line);background:#fff;border-radius:18px;padding:14px 16px}.device-chip span{color:var(--muted);font-size:14px}
.tech-panel{border-radius:30px;background:#111827;color:#fff;padding:24px;position:relative;overflow:hidden}.tech-panel:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 10%,rgba(41,128,254,.25),transparent 30%),radial-gradient(circle at 80% 70%,rgba(184,77,218,.22),transparent 32%)}.tech-panel>*{position:relative}.tech-panel p{color:#cbd5e1}.protocol-list{display:grid;gap:12px;margin-top:18px}.protocol-list div{border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:14px;background:rgba(255,255,255,.08)}
.process-steps{display:grid;gap:16px;counter-reset:step}.step-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 34px rgba(31,41,55,.06)}.step-card:before{counter-increment:step;content:counter(step);display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-weight:900;margin-bottom:12px}.step-card h3{margin:0 0 8px}.step-card p{margin:0;color:var(--muted)}
.risk-grid{display:grid;gap:16px}.risk-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:18px;padding:18px}.risk-card h3{margin:0 0 8px}.risk-card p{margin:0 0 8px;color:var(--muted)}.risk-card strong{color:#111827}
.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.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 25%),radial-gradient(circle at 80% 70%,rgba(255,255,255,.16),transparent 28%)}.cta-section .container{position:relative}.cta-section .section-title{color:#fff}.cta-section .section-desc{color:rgba(255,255,255,.86);margin-left:auto;margin-right:auto}
.page-hero{background:linear-gradient(180deg,#f7fbff,#fff);padding:54px 0 34px;border-bottom:1px solid var(--line)}.page-hero h1{font-size:38px;line-height:1.2;margin:0 0 14px;letter-spacing:-.04em;color:#111827}.page-hero p{margin:0;color:var(--muted);max-width:780px}
.content-layout{display:grid;gap:24px;align-items:start}.article-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:0 14px 42px rgba(31,41,55,.06)}.article-panel h2{margin:8px 0 12px;color:#111827}.article-panel p{color:#475569}.side-panel{background:#f8fbff;border:1px solid var(--line);border-radius:22px;padding:20px;position:sticky;top:94px}.side-panel h3{margin:0 0 12px}.side-panel a{display:block;color:var(--blue);font-weight:800;margin-top:10px}
.check-list{display:grid;gap:10px;margin:18px 0;padding:0;list-style:none}.check-list li{background:#f8fafc;border:1px solid var(--line);border-radius:14px;padding:12px 14px;color:#475569}.tips-box{border-radius:20px;background:#eef5ff;border:1px solid #dbeafe;padding:18px;color:#334155;margin:18px 0}.download-row{margin-top:24px}
.download-page-card{max-width:860px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:var(--shadow);text-align:center}.download-steps{display:grid;gap:14px;margin:24px 0;text-align:left}.download-steps div{background:#f8fafc;border:1px solid var(--line);border-radius:18px;padding:16px}.safety-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:0 12px 36px rgba(31,41,55,.06)}
.site-footer{background:#0f172a;color:#cbd5e1;padding:48px 0 0}.footer-grid{display:grid;gap:28px}.footer-brand{font-size:24px;color:#fff;font-weight:900;margin-bottom:8px}.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-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding:18px;color:#94a3b8;font-size:14px}
@media (min-width:700px){.overview-grid{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:repeat(2,1fr)}.risk-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.speed-cards{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}.page-hero h1{font-size:46px}}
@media (min-width:980px){.nav-toggle-label{display:none}.site-nav{position:static;display:flex;flex-direction:row;align-items:center;background:transparent;border:0;box-shadow:none;border-radius:0;padding:0;gap:2px}.vpn-network-hero{padding:94px 0 62px}.vpn-network-hero .container{grid-template-columns:1.05fr .95fr}.hero-copy h1{font-size:58px}.overview-grid{grid-template-columns:repeat(4,1fr)}.split{grid-template-columns:1fr 1fr;gap:54px}.split.reverse .media{order:initial}.card-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(4,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.content-layout{grid-template-columns:minmax(0,1fr) 300px}.article-panel{padding:34px}.section{padding:86px 0}.section-title{font-size:42px}.device-row{grid-template-columns:repeat(3,1fr)}}
@media (max-width:430px){.container{width:min(100% - 26px,1120px)}.header-inner{width:calc(100% - 24px)}.hero-copy h1{font-size:36px}.section-title{font-size:29px}.page-hero h1{font-size:33px}.status-card{position:static;margin:8px 0}.hero-visual{display:block;min-height:auto}.floating-tags{display:none}.hero-card{margin-top:18px}.download-btn{width:100%}.section{padding:52px 0}}