:root{
    --brand-gradient: linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --light:#f5f7fb;
    --line:#e5eaf2;
    --panel:#ffffff;
    --soft:#eef5ff;
    --shadow:0 18px 45px rgba(31,41,55,.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;background:#fff;color:var(--text);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(229,234,242,.9)}
.nav-shell{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#172033;font-size:18px;white-space:nowrap}
.logo{width:38px;height:38px;border-radius:12px;object-fit:cover;box-shadow:0 8px 20px rgba(41,128,254,.18)}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-toggle-label{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;display:grid;place-content:center;gap:5px;background:#fff;cursor:pointer}
.nav-toggle-label span{display:block;width:19px;height:2px;background:#25324a;border-radius:10px}
.site-nav{position:absolute;left:0;right:0;top:72px;display:none;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.site-nav a{padding:10px 12px;border-radius:12px;color:#344054;font-size:14px;font-weight:650}
.site-nav a:hover,.site-nav a.active{background:#eef5ff;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:13px 24px;background:var(--blue);color:#fff!important;border-radius:999px;font-weight:800;box-shadow:0 16px 28px rgba(41,128,254,.28);transition:.2s ease;white-space:nowrap;border:0}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px);box-shadow:0 18px 32px rgba(23,104,232,.34)}
.section{padding:64px 0}
.section.alt{background:var(--light)}
.section-head{max-width:760px;margin:0 auto 28px;text-align:center}
.section-kicker,.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-weight:800;font-size:13px;margin-bottom:12px}
h1,h2,h3{line-height:1.22;margin:0 0 14px;color:#121826}
h1{font-size:34px;letter-spacing:-.04em}
h2{font-size:28px;letter-spacing:-.03em}
h3{font-size:20px}
p{margin:0 0 14px;color:var(--muted)}
ul,ol{margin:0;padding-left:20px;color:var(--muted)}
.gradient-bg{background:var(--brand-gradient)}
.vpn-network-hero{position:relative;overflow:hidden;background:var(--brand-gradient);padding:64px 0 38px;color:#fff}
.vpn-network-hero:before,.vpn-network-hero:after{content:"";position:absolute;inset:auto;border-radius:999px;filter:blur(18px);opacity:.42;background:#fff}
.vpn-network-hero:before{width:220px;height:220px;right:-68px;top:30px}
.vpn-network-hero:after{width:180px;height:180px;left:-72px;bottom:-46px}
.hero-grid{position:relative;display:grid;gap:36px;align-items:center;z-index:1}
.hero-copy h1{color:#fff;font-size:40px;margin-bottom:16px}
.hero-copy p{color:rgba(255,255,255,.88);font-size:16px;max-width:650px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 24px}
.hero-tags span{padding:8px 12px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.12);border-radius:999px;color:#fff;font-weight:700;font-size:13px}
.hero-visual{position:relative;min-height:300px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(255,255,255,.16),rgba(255,255,255,.05));border:1px solid rgba(255,255,255,.22);border-radius:32px;padding:28px;box-shadow:0 28px 70px rgba(24,38,92,.25)}
.hero-visual:before{content:"";position:absolute;inset:20px;background:radial-gradient(circle at 20% 20%,rgba(255,255,255,.35) 0 3px,transparent 4px),radial-gradient(circle at 75% 42%,rgba(255,255,255,.45) 0 4px,transparent 5px),linear-gradient(120deg,transparent 0 20%,rgba(255,255,255,.2) 21%,transparent 22% 58%,rgba(255,255,255,.16) 59%,transparent 60%);border-radius:28px;opacity:.75}
.hero-visual img{position:relative;z-index:1;max-height:330px;object-fit:contain}
.float-label{position:absolute;z-index:2;padding:8px 12px;background:rgba(255,255,255,.92);color:#20304c;border-radius:999px;font-size:13px;font-weight:800;box-shadow:0 12px 24px rgba(17,24,39,.16)}
.float-label.one{left:18px;top:22px}.float-label.two{right:16px;top:70px}.float-label.three{left:20px;bottom:62px}.float-label.four{right:22px;bottom:22px}
.node-overview{display:grid;gap:16px;margin-top:-22px;position:relative;z-index:2}
.node-card,.feature-card,.risk-card,.faq-item,.step-card,.info-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 12px 28px rgba(31,41,55,.05)}
.node-card small{display:inline-flex;color:var(--blue);font-weight:900;margin-bottom:8px}
.node-card a,.text-link{color:var(--blue);font-weight:800}
.split-section{display:grid;gap:26px;align-items:center}
.image-panel{background:linear-gradient(180deg,#fff,#f3f7ff);border:1px solid var(--line);border-radius:32px;padding:22px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.image-panel img{margin:auto;max-height:360px;object-fit:contain}
.feature-list{display:grid;gap:12px;margin-top:18px}
.feature-list li{list-style:none;margin-left:-20px;padding:12px 14px;border-left:4px solid var(--blue);background:#f7faff;border-radius:14px;color:#445066}
.vpn-connection-section,.global-nodes-section,.high-speed-section,.privacy-protection-section,.no-log-policy-section,.multi-device-section,.encryption-protocol-section{padding:72px 0}
.global-nodes-section .map-panel{position:relative;background:linear-gradient(135deg,#f7fbff,#eef5ff);border:1px solid var(--line);border-radius:32px;padding:24px;overflow:hidden}
.map-panel:before{content:"";position:absolute;inset:18px;background:radial-gradient(circle at 20% 35%,#2980FE 0 4px,transparent 5px),radial-gradient(circle at 70% 25%,#7B4EF1 0 4px,transparent 5px),radial-gradient(circle at 82% 72%,#B84DDA 0 4px,transparent 5px),linear-gradient(25deg,transparent 0 36%,rgba(41,128,254,.2) 37%,transparent 39%),linear-gradient(145deg,transparent 0 42%,rgba(123,78,241,.18) 43%,transparent 45%);border-radius:26px;opacity:.8}
.map-panel img{position:relative;z-index:1;margin:auto;max-height:340px}
.speed-lines{display:grid;gap:12px;margin:20px 0}
.speed-line{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px;color:#445066;font-weight:700}
.speed-line span{height:8px;border-radius:999px;background:var(--blue);flex:1;opacity:.8}
.privacy-panel,.tech-panel,.safety-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.privacy-tags,.protocol-grid,.card-grid{display:grid;gap:14px;margin-top:18px}
.privacy-tags span,.protocol-grid span{padding:12px 14px;background:#f6f9ff;border:1px solid var(--line);border-radius:16px;color:#445066;font-weight:700}
.policy-grid{display:grid;gap:16px}
.device-grid{display:grid;gap:16px;margin-top:20px}
.device-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}
.process-steps{display:grid;gap:16px;counter-reset:step}
.step-card{position:relative;padding-left:68px}
.step-card:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:22px;width:34px;height:34px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.risk-grid{display:grid;gap:16px}
.risk-card{border-left:5px solid var(--blue)}
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item h3{font-size:18px;margin-bottom:8px}
.cta-section{padding:70px 0;background:var(--brand-gradient);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-section h2{color:#fff}.cta-section p{color:rgba(255,255,255,.88);max-width:680px;margin-left:auto;margin-right:auto}
.page-hero{padding:56px 0 28px;background:linear-gradient(180deg,#f5f8ff,#fff)}
.page-hero .page-intro{max-width:820px}.page-hero h1{font-size:34px}.page-hero p{font-size:16px}
.content-container{display:grid;gap:24px;align-items:start;padding:44px 0 70px}
.article-main{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 16px 35px rgba(31,41,55,.05)}
.article-main section{margin-bottom:26px}.article-main section:last-child{margin-bottom:0}
.side-panel{background:#f7faff;border:1px solid var(--line);border-radius:24px;padding:20px;position:sticky;top:92px}
.check-list{display:grid;gap:12px;padding-left:0;margin:16px 0}
.check-list li{list-style:none;padding:12px 14px;border-radius:14px;background:#f7faff;border:1px solid var(--line);color:#445066}
.notice-box{padding:18px;border-radius:20px;background:#f7faff;border:1px solid var(--line);border-left:5px solid var(--blue);color:#445066}
.download-panel{margin-top:24px;padding:22px;border-radius:24px;background:linear-gradient(180deg,#f7fbff,#fff);border:1px solid var(--line);text-align:center}
.download-page-grid{display:grid;gap:20px}.download-actions{text-align:center;margin:26px 0}.install-steps{display:grid;gap:14px;counter-reset:install}.install-step{position:relative;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px 18px 18px 62px}.install-step:before{counter-increment:install;content:counter(install);position:absolute;left:18px;top:18px;width:32px;height:32px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.site-footer{background:#101828;color:#d0d5dd;padding:46px 0 22px}.site-footer h2{color:#fff;font-size:16px;margin-bottom:12px}.site-footer p{color:#98a2b3}.footer-grid{display:grid;gap:26px}.site-footer a{display:block;color:#d0d5dd;margin:8px 0}.site-footer a:hover{color:#fff}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:18px;margin-bottom:10px}.footer-brand img{width:34px;height:34px;border-radius:10px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;display:flex;flex-direction:column;gap:8px;color:#98a2b3;font-size:13px}
@media (min-width:640px){
    h1{font-size:42px}.hero-copy h1{font-size:48px}.node-overview,.policy-grid,.privacy-tags,.protocol-grid,.card-grid,.risk-grid,.device-grid,.download-page-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
    .nav-toggle-label{display:none}.site-nav{position:static;display:flex!important;flex-direction:row;align-items:center;background:transparent;border:0;border-radius:0;box-shadow:none;padding:0;gap:2px}.site-nav a{font-size:13px;padding:8px 9px}.hero-grid,.split-section{grid-template-columns:1.05fr .95fr}.vpn-network-hero{padding:86px 0 60px}.node-overview{grid-template-columns:repeat(4,1fr)}.content-container{grid-template-columns:minmax(0,1fr) 310px}.risk-grid{grid-template-columns:repeat(3,1fr)}.policy-grid,.protocol-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}.footer-bottom{flex-direction:row;justify-content:space-between}.page-hero h1{font-size:46px}.article-main{padding:34px}.site-nav a{white-space:nowrap}
}
@media (min-width:1120px){.site-nav a{font-size:14px;padding:9px 11px}.hero-copy h1{font-size:56px}}