:root{
    --brand-gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-hover:#1768E8;
    --ink:#151B2D;
    --text:#354057;
    --muted:#6E7891;
    --line:#E6EBF4;
    --soft:#F6F8FC;
    --soft-blue:#F1F6FF;
    --white:#FFFFFF;
    --radius:28px;
    --shadow:0 18px 45px rgba(33,54,98,.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;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.section{padding:64px 0}
.section-soft{background:var(--soft)}
.section-title{margin:0 0 14px;color:var(--ink);font-size:32px;line-height:1.2;letter-spacing:-.02em}
.section-lead{margin:0 0 28px;color:var(--muted);max-width:760px}
.eyebrow,.category-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#EBF3FF;color:#236DE8;font-size:13px;font-weight:700;margin-bottom:16px}
.text-link{display:inline-flex;align-items:center;color:var(--blue);font-weight:700;margin-top:10px}
.text-link::after{content:"›";margin-left:6px}
.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:800;box-shadow:0 12px 26px rgba(41,128,254,.28);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-hover);transform:translateY(-1px)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,235,244,.82)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;color:var(--ink)}
.brand-logo{width:38px;height:38px;border-radius:12px;object-fit:cover;box-shadow:0 8px 20px rgba(41,128,254,.16)}
.brand-name{font-size:20px;letter-spacing:.02em}
.nav-toggle-input{display:none}
.nav-toggle{width:42px;height:42px;border-radius:14px;border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#fff}
.nav-toggle span{width:18px;height:2px;border-radius:2px;background:var(--ink)}
.site-nav{position:absolute;left:18px;right:18px;top:74px;display:none;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}
.site-nav a{padding:11px 12px;border-radius:14px;color:#4A5368;font-weight:700;font-size:14px}
.site-nav a:hover,.site-nav a.active{background:#EFF5FF;color:var(--blue)}
.nav-toggle-input:checked ~ .site-nav{display:flex}
.vpn-saas-hero{padding:36px 0 64px;background:linear-gradient(180deg,#F7FAFF 0%,#fff 100%);position:relative;overflow:hidden}
.hero-shell{position:relative;display:grid;gap:34px;padding:34px 22px;border-radius:34px;background:var(--brand-gradient);color:#fff;box-shadow:0 26px 70px rgba(67,78,229,.26);overflow:hidden}
.hero-shell::before{content:"";position:absolute;inset:-40% -30% auto auto;width:72%;height:120%;background:rgba(255,255,255,.16);transform:skewX(-18deg);border-radius:80px}
.hero-copy,.hero-visual{position:relative;z-index:1}
.hero-copy h1{margin:0 0 16px;font-size:38px;line-height:1.15;letter-spacing:-.03em;color:#fff}
.hero-copy p{margin:0 0 22px;color:rgba(255,255,255,.88);font-size:16px;max-width:620px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags span,.floating-card,.mini-status{display:inline-flex;align-items:center;gap:8px;border-radius:999px;background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.25);padding:8px 12px;font-size:13px;font-weight:700;backdrop-filter:blur(14px)}
.hero-device{position:relative;margin:0 auto;max-width:460px;padding:18px;border-radius:30px;background:rgba(255,255,255,.20);border:1px solid rgba(255,255,255,.28);box-shadow:0 20px 50px rgba(18,27,75,.22)}
.hero-device img{border-radius:24px;width:100%;object-fit:cover;background:#fff}
.floating-card{position:absolute;background:#fff;color:#28334D;border:1px solid rgba(255,255,255,.7);box-shadow:0 14px 28px rgba(19,28,62,.16)}
.floating-card.card-a{left:-6px;top:18%}.floating-card.card-b{right:-6px;top:40%}.floating-card.card-c{left:12px;bottom:12%}.floating-card.card-d{right:12px;bottom:6%}
.product-highlights{display:grid;grid-template-columns:1fr;gap:16px;margin-top:-30px;position:relative;z-index:2}
.highlight-card{padding:24px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:0 15px 32px rgba(35,55,110,.08)}
.highlight-card .tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:#EBF3FF;color:var(--blue);font-size:12px;font-weight:800;margin-bottom:12px}
.highlight-card h3{margin:0 0 8px;color:var(--ink);font-size:19px}.highlight-card p{margin:0;color:var(--muted);font-size:14px}
.feature-panel{display:grid;gap:26px;align-items:center;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:24px}
.feature-panel.reverse{background:linear-gradient(180deg,#fff 0%,#F7FAFF 100%)}
.feature-content h2{margin:0 0 12px;color:var(--ink);font-size:30px;line-height:1.25}.feature-content p{margin:0 0 16px;color:var(--muted)}
.feature-list{display:grid;gap:10px;margin:18px 0;padding:0;list-style:none}.feature-list li{padding-left:28px;position:relative;color:#3E4960}.feature-list li::before{content:"";position:absolute;left:0;top:.68em;width:9px;height:9px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #EAF3FF}
.feature-media{border-radius:24px;background:var(--soft-blue);padding:18px;min-height:260px;display:flex;align-items:center;justify-content:center;overflow:hidden}.feature-media img{border-radius:20px;max-height:390px;object-fit:cover}
.high-speed-section .feature-panel{background:linear-gradient(135deg,#F7FAFF 0%,#FFFFFF 58%,#F6F0FF 100%)}
.global-nodes-section .node-grid{display:grid;gap:16px;margin-top:18px}.node-card,.privacy-card,.policy-card,.protocol-card,.risk-card,.faq-item,.step-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 24px rgba(40,59,103,.06)}
.node-card strong,.privacy-card strong,.policy-card strong,.protocol-card strong,.risk-card strong{display:block;color:var(--ink);margin-bottom:6px}.node-card p,.privacy-card p,.policy-card p,.protocol-card p,.risk-card p{margin:0;color:var(--muted);font-size:14px}
.privacy-protection-section .privacy-layout{display:grid;gap:20px;align-items:center}.privacy-grid,.policy-grid,.protocol-grid,.risk-grid,.faq-grid,.related-grid,.check-grid{display:grid;grid-template-columns:1fr;gap:16px}
.policy-card{border-top:4px solid var(--blue)}
.device-stack{display:grid;gap:14px}.device-mini{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}.device-mini span{width:40px;height:40px;border-radius:14px;background:#EBF3FF;color:var(--blue);font-weight:900;display:flex;align-items:center;justify-content:center;flex:0 0 auto}.device-mini h3{margin:0 0 4px;color:var(--ink)}.device-mini p{margin:0;color:var(--muted);font-size:14px}
.protocol-panel{border-radius:28px;background:#111A33;color:#fff;padding:24px;position:relative;overflow:hidden}.protocol-panel::before{content:"";position:absolute;inset:auto -20% -45% auto;width:75%;height:75%;background:radial-gradient(circle,rgba(41,128,254,.28),transparent 70%)}.protocol-panel h2,.protocol-panel strong{color:#fff}.protocol-panel p,.protocol-panel li{color:rgba(255,255,255,.74)}.protocol-panel .text-link{color:#9EC6FF}
.process-steps{display:grid;grid-template-columns:1fr;gap:16px;counter-reset:step}.step-card{position:relative;padding-top:54px}.step-card::before{counter-increment:step;content:counter(step);position:absolute;top:18px;left:20px;width:30px;height:30px;border-radius:11px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}.step-card h3{margin:0 0 6px;color:var(--ink)}.step-card p{margin:0;color:var(--muted);font-size:14px}
.risk-card{border-left:4px solid var(--blue)}.risk-card b{display:block;color:var(--ink);margin-bottom:4px}.risk-card em{display:block;margin-top:10px;font-style:normal;color:#236DE8;font-weight:800;font-size:14px}
.faq-item h3{margin:0 0 8px;color:var(--ink);font-size:18px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{padding:64px 0}.cta-box{border-radius:34px;background:var(--brand-gradient);color:#fff;text-align:center;padding:42px 22px;box-shadow:0 22px 60px rgba(67,78,229,.23);position:relative;overflow:hidden}.cta-box::before{content:"";position:absolute;inset:-20% auto auto -10%;width:46%;height:120%;background:rgba(255,255,255,.12);transform:skewX(-14deg);border-radius:70px}.cta-box h2,.cta-box p,.cta-box a{position:relative}.cta-box h2{margin:0 0 10px;font-size:30px;color:#fff}.cta-box p{margin:0 auto 22px;max-width:680px;color:rgba(255,255,255,.86)}
.page-hero{padding:46px 0 28px;background:linear-gradient(180deg,#F6F9FF 0%,#fff 100%)}.page-hero h1{margin:0 0 14px;color:var(--ink);font-size:36px;line-height:1.2}.page-hero p{margin:0 0 20px;color:var(--muted);max-width:760px}.page-shell{display:grid;gap:24px;align-items:start;padding:24px 0 70px}.page-main{display:grid;gap:22px}.content-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:0 10px 24px rgba(40,59,103,.06)}.content-card h2{margin:0 0 12px;color:var(--ink);font-size:24px}.content-card p{margin:0 0 12px}.content-card p:last-child{margin-bottom:0}.side-panel{background:#F7FAFF;border:1px solid var(--line);border-radius:24px;padding:22px;position:sticky;top:92px}.side-panel h3{margin:0 0 12px;color:var(--ink)}.side-panel a{display:block;padding:10px 0;color:#236DE8;font-weight:700;border-bottom:1px solid #E4EBF7}.side-panel a:last-child{border-bottom:0}
.check-list{padding:0;margin:0;list-style:none;display:grid;gap:10px}.check-list li{padding:13px 14px;border-radius:16px;background:#F6F8FC;border:1px solid var(--line);color:#3A465E}.check-list li strong{color:var(--ink)}
.download-page .download-card{text-align:center;max-width:840px;margin:0 auto}.download-page .download-card .download-btn{margin:12px 0 24px}.download-page .steps{display:grid;gap:14px;text-align:left;margin-top:24px}.download-page .steps div{padding:16px;border:1px solid var(--line);border-radius:18px;background:#fff}.download-page .steps strong{display:block;color:var(--ink);margin-bottom:4px}
.about-values{display:grid;grid-template-columns:1fr;gap:16px}.value-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px}.value-card h3{margin:0 0 8px;color:var(--ink)}.value-card p{margin:0;color:var(--muted)}
.site-footer{background:#111827;color:#C7D0E0;padding:46px 0 20px}.footer-grid{display:grid;gap:26px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:12px}.footer-brand img{width:34px;height:34px;border-radius:10px}.site-footer h3{margin:0 0 12px;color:#fff;font-size:16px}.site-footer a{display:block;color:#C7D0E0;margin:8px 0}.site-footer p{margin:0;max-width:360px;color:#9AA6BA}.footer-bottom{border-top:1px solid rgba(255,255,255,.10);margin-top:30px;padding-top:18px;font-size:13px;color:#96A1B5}
@media (min-width:640px){.product-highlights,.privacy-grid,.policy-grid,.protocol-grid,.risk-grid,.faq-grid,.related-grid,.check-grid,.about-values{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.download-page .steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.nav-toggle{display:none}.site-nav{position:static;display:flex!important;flex-direction:row;align-items:center;gap:4px;background:transparent;border:0;border-radius:0;padding:0;box-shadow:none}.site-nav a{padding:8px 11px}.hero-shell{grid-template-columns:1.02fr .98fr;align-items:center;padding:58px 54px;border-radius:40px;min-height:560px}.hero-copy h1{font-size:58px}.section{padding:86px 0}.product-highlights{grid-template-columns:repeat(4,1fr);margin-top:-42px}.feature-panel{grid-template-columns:1fr 1fr;padding:38px}.feature-panel.reverse .feature-media{order:-1}.global-nodes-section .node-grid{grid-template-columns:repeat(3,1fr)}.privacy-protection-section .privacy-layout{grid-template-columns:1.08fr .92fr}.policy-grid,.protocol-grid,.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.page-shell{grid-template-columns:minmax(0,1fr) 310px}.page-hero h1{font-size:48px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}.section-title{font-size:40px}.cta-box{padding:58px 42px}.cta-box h2{font-size:40px}}
@media (max-width:420px){.container{width:min(100% - 28px,1120px)}.hero-copy h1{font-size:32px}.hero-shell{padding:28px 18px}.floating-card{position:static;margin:8px 0 0}.hero-visual{display:grid;gap:8px}.section-title,.feature-content h2{font-size:28px}.page-hero h1{font-size:32px}.download-btn{width:100%}.cta-box .download-btn{width:auto}.site-nav{left:14px;right:14px}}