:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#172033;
    --muted:#5F6B7A;
    --light:#F5F7FB;
    --soft:#EEF4FF;
    --line:#E4E9F2;
    --white:#FFFFFF;
    --shadow:0 18px 48px rgba(32, 58, 118, .12);
    --radius:28px;
}
*{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:1.7;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:20;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(228,233,242,.85)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#15203D}
.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover;box-shadow:0 8px 20px rgba(41,128,254,.18)}
.nav-toggle{display:none}
.nav-toggle-label{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;gap:6px;align-items:center;border:1px solid var(--line);border-radius:14px;background:#fff}
.nav-toggle-label span{width:20px;height:2px;background:#172033;border-radius:3px}
.site-nav{position:absolute;left:16px;right:16px;top:72px;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:12px 14px;border-radius:14px;color:#4B586A;font-weight:650}
.site-nav a.active,.site-nav a:hover{background:#EEF4FF;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:0 26px;background:var(--blue);color:#fff!important;border-radius:999px;font-weight:800;letter-spacing:.02em;box-shadow:0 14px 28px rgba(41,128,254,.25);transition:transform .2s ease,background .2s ease,box-shadow .2s ease}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 18px 34px rgba(23,104,232,.28)}
.text-link{color:var(--blue);font-weight:750}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#EEF4FF;color:var(--blue);font-weight:800;font-size:13px}
.section{padding:62px 0}
.section-soft{background:linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 100%)}
.section-title{font-size:30px;line-height:1.2;margin:0 0 14px;letter-spacing:-.03em}
.section-lead{color:var(--muted);max-width:760px;margin:0 0 26px}
.vpn-saas-hero{position:relative;padding:54px 0 64px;background:var(--gradient);overflow:hidden;color:#fff}
.vpn-saas-hero:after{content:"";position:absolute;left:-10%;right:-10%;bottom:-80px;height:160px;background:#fff;transform:skewY(-4deg);transform-origin:0 0}
.hero-grid{position:relative;z-index:1;display:grid;gap:32px;align-items:center}
.hero-copy h1{font-size:38px;line-height:1.12;margin:12px 0 16px;letter-spacing:-.04em}
.hero-copy p{color:rgba(255,255,255,.88);margin:0 0 22px;font-size:17px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0}
.hero-tags span,.floating-label{display:inline-flex;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);color:#fff;font-weight:700;font-size:13px}
.hero-visual{position:relative;padding:18px}
.hero-device{background:rgba(255,255,255,.17);border:1px solid rgba(255,255,255,.25);border-radius:36px;padding:18px;box-shadow:0 28px 60px rgba(21,31,72,.22)}
.hero-device img{border-radius:28px;margin:auto;max-height:430px;object-fit:contain}
.floating-label{position:absolute;background:#fff;color:#1F2A44;box-shadow:0 16px 32px rgba(25,42,82,.14);border:0}
.float-a{top:6px;left:0}.float-b{top:24%;right:0}.float-c{bottom:24%;left:0}.float-d{bottom:8px;right:12px}
.product-highlights{display:grid;gap:16px;margin-top:-18px;position:relative;z-index:3}
.highlight-card,.card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 10px 28px rgba(32,58,118,.07)}
.highlight-card .mini-label{display:inline-flex;padding:5px 10px;border-radius:999px;background:#EEF4FF;color:var(--blue);font-weight:800;font-size:12px;margin-bottom:12px}
.highlight-card h3,.card h3{margin:0 0 8px;font-size:20px}.highlight-card p,.card p{margin:0 0 14px;color:var(--muted)}
.feature-panel{display:grid;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.feature-panel.reverse{} 
.feature-media{background:linear-gradient(180deg,#F7FAFF,#EEF4FF);border-radius:24px;padding:18px;min-height:240px;display:flex;align-items:center;justify-content:center}
.feature-media img{max-height:360px;object-fit:contain;border-radius:20px}
.feature-list{display:grid;gap:10px;margin:18px 0 22px;padding:0;list-style:none}
.feature-list li{position:relative;padding-left:28px;color:#415064}.feature-list li:before{content:"";position:absolute;left:0;top:.75em;width:10px;height:10px;background:var(--blue);border-radius:50%;box-shadow:0 0 0 5px #E7F1FF}
.vpn-connection-section .feature-panel{border-top:5px solid #3558F2}
.high-speed-section{background:linear-gradient(180deg,#F7FAFF 0%,#EEF4FF 100%)}
.high-speed-section .feature-panel{background:linear-gradient(135deg,#fff 0%,#F7FAFF 100%)}
.global-nodes-section .feature-panel{border-left:5px solid #7B4EF1}
.privacy-protection-section{background:#F7FAFF}.privacy-layout{display:grid;gap:22px;align-items:center}.privacy-cards{display:grid;gap:14px}.privacy-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.privacy-card h3{margin:0 0 8px}.privacy-card p{margin:0;color:var(--muted)}
.no-log-policy-section .policy-grid,.encryption-protocol-section .tech-grid,.risk-grid,.faq-grid,.related-grid{display:grid;gap:16px}.policy-card,.tech-card,.risk-card,.faq-item,.step-card,.related-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 8px 22px rgba(32,58,118,.06)}
.policy-card h3,.tech-card h3,.risk-card h3,.faq-item h3,.step-card h3{margin:0 0 8px}.policy-card p,.tech-card p,.risk-card p,.faq-item p,.step-card p{margin:0;color:var(--muted)}
.multi-device-section{background:linear-gradient(180deg,#fff 0%,#F7FAFF 100%)}
.device-grid{display:grid;gap:16px}.device-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px}.device-card strong{display:block;font-size:18px;margin-bottom:6px}.device-card span{color:var(--muted)}
.encryption-protocol-section .tech-card{border-top:4px solid var(--blue)}
.process-steps{display:grid;gap:16px;counter-reset:step}.step-card{position:relative;padding-top:56px}.step-card:before{counter-increment:step;content:counter(step);position:absolute;top:18px;left:20px;width:30px;height:30px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.safety-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.risk-card{border-left:5px solid var(--blue)}.risk-card .suggest{display:block;margin-top:10px;color:#2C3A50;font-weight:750}
.faq-item{box-shadow:none}.faq-item h3{font-size:18px}.faq-list{display:grid;gap:14px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}.faq-list summary{cursor:pointer;font-weight:800}.faq-list p{color:var(--muted);margin:12px 0 0}
.cta-section{padding:58px 0;background:var(--gradient);color:#fff;text-align:center}.cta-card{max-width:820px;margin:0 auto}.cta-card h2{font-size:32px;line-height:1.2;margin:0 0 12px}.cta-card p{color:rgba(255,255,255,.88);margin:0 auto 24px;max-width:680px}
.page-hero{padding:54px 0 28px;background:linear-gradient(180deg,#F7FAFF 0%,#fff 100%)}.page-hero h1{font-size:36px;line-height:1.18;margin:14px 0 14px;letter-spacing:-.03em}.page-hero p{color:var(--muted);max-width:820px;margin:0}
.page-layout{display:grid;gap:22px;padding:28px 0 64px}.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.article-card h2{margin:0 0 12px;font-size:24px}.article-card p{color:#46566A;margin:0 0 14px}.article-card p:last-child{margin-bottom:0}
.side-card{background:#F7FAFF;border:1px solid var(--line);border-radius:24px;padding:22px}.side-card h3{margin:0 0 12px}.check-list{display:grid;gap:10px;padding:0;margin:0;list-style:none}.check-list li{padding-left:26px;position:relative;color:#46566A}.check-list li:before{content:"";position:absolute;left:0;top:.72em;width:9px;height:9px;border-radius:50%;background:var(--blue)}
.download-steps{display:grid;gap:14px;margin:24px 0}.download-step{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}.download-step span{width:32px;height:32px;flex:0 0 32px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.download-box{text-align:center;background:linear-gradient(135deg,#F7FAFF 0%,#fff 100%);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-top:22px}
.site-footer{background:#121B2E;color:#C9D3E5;padding:46px 0 22px}.footer-grid{display:grid;gap:28px}.footer-brand{font-weight:900;color:#fff;font-size:22px;margin-bottom:10px}.site-footer h3{color:#fff;margin:0 0 12px;font-size:16px}.site-footer a{display:block;color:#C9D3E5;margin:7px 0}.site-footer a:hover{color:#fff}.site-footer p{margin:0;color:#AEBBD0}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:28px;padding-top:18px;font-size:14px}
@media (min-width:640px){
    .product-highlights,.privacy-cards,.policy-grid,.tech-grid,.risk-grid,.faq-grid,.related-grid,.device-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;padding:0;box-shadow:none;gap:2px}.site-nav a{padding:9px 12px;font-size:14px}
    .vpn-saas-hero{padding:80px 0 100px}.hero-grid{grid-template-columns:1.02fr .98fr}.hero-copy h1{font-size:56px}.hero-copy p{font-size:19px}
    .product-highlights{grid-template-columns:repeat(4,1fr);margin-top:-48px}
    .feature-panel{grid-template-columns:1fr 1fr;padding:34px}.feature-panel.reverse .feature-content{order:2}.feature-panel.reverse .feature-media{order:1}
    .privacy-layout{grid-template-columns:1fr .84fr}.policy-grid{grid-template-columns:repeat(3,1fr)}.tech-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.faq-grid{grid-template-columns:repeat(2,1fr)}.device-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}
    .page-layout{grid-template-columns:minmax(0,1fr) 330px;align-items:start}.page-hero h1{font-size:46px}.article-card{padding:34px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}
}
@media (min-width:1100px){.section-title{font-size:38px}.section{padding:82px 0}.site-nav a{padding:9px 14px}}