:root{
  --primary:#2980FE;
  --primary-dark:#1768E8;
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --text:#202838;
  --muted:#627086;
  --light:#F4F7FB;
  --line:#E6ECF4;
  --card:#FFFFFF;
  --soft:#F8FAFE;
  --radius:28px;
  --shadow:0 18px 50px rgba(35,56,96,.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:1.72;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(14px);border-bottom:1px solid rgba(230,236,244,.8)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:70px;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:#172033;white-space:nowrap}
.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-toggle-label{width:44px;height:44px;border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#fff;box-shadow:0 6px 16px rgba(36,62,106,.06)}
.nav-toggle-label span{width:18px;height:2px;background:#24324A;border-radius:3px}
.site-nav{position:absolute;left:14px;right:14px;top:72px;display:none;grid-template-columns:1fr;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}
.site-nav a{display:block;padding:12px 14px;border-radius:14px;color:#44516A;font-size:15px}
.site-nav a.active,.site-nav a:hover{color:var(--primary);background:#EEF5FF}
.nav-toggle:checked~.site-nav{display:grid}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:var(--primary);color:#fff;font-weight:800;letter-spacing:.02em;box-shadow:0 14px 28px rgba(41,128,254,.25);transition:.22s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 18px 34px rgba(23,104,232,.28)}
.text-link{display:inline-flex;align-items:center;color:var(--primary);font-weight:700;margin-top:10px}
.text-link:after{content:"›";font-size:20px;margin-left:6px;line-height:1}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#EEF5FF;color:var(--primary);font-weight:800;font-size:13px}
.eyebrow{font-size:13px;color:var(--primary);font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.section-title{font-size:30px;line-height:1.22;margin:0 0 12px;color:#152033;letter-spacing:-.02em}
.section-desc{margin:0;color:var(--muted);max-width:760px}
.section-head{margin-bottom:24px}
.vpn-saas-hero{position:relative;background:var(--gradient);color:#fff;overflow:hidden;padding:58px 0 74px;isolation:isolate}
.vpn-saas-hero:before{content:"";position:absolute;inset:auto -12% -36% -12%;height:56%;background:#fff;transform:skewY(-6deg);transform-origin:100% 0;z-index:-1}
.hero-grid{display:grid;gap:32px;align-items:center}
.hero-content h1{font-size:42px;line-height:1.08;margin:0 0 18px;letter-spacing:-.04em;max-width:720px}
.hero-content p{font-size:17px;color:rgba(255,255,255,.88);margin:0 0 24px;max-width:660px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:8px 12px;font-size:13px;color:#fff}
.hero-visual{position:relative;min-height:320px;display:flex;align-items:center;justify-content:center}
.hero-device{position:relative;width:min(430px,88%);padding:18px;border-radius:36px;background:rgba(255,255,255,.18);box-shadow:0 28px 80px rgba(11,26,65,.26);backdrop-filter:blur(10px)}
.hero-device img{border-radius:26px;margin:auto;filter:drop-shadow(0 18px 36px rgba(16,27,69,.18))}
.float-card{position:absolute;display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:16px;background:#fff;color:#22324A;font-weight:800;font-size:13px;box-shadow:0 18px 42px rgba(20,36,74,.18)}
.float-card:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--primary)}
.float-card.one{top:22px;left:0}.float-card.two{right:0;top:92px}.float-card.three{left:8px;bottom:62px}.float-card.four{right:8px;bottom:18px}
.product-highlights{margin-top:-36px;position:relative;z-index:2;padding-bottom:54px}
.highlight-grid{display:grid;gap:16px}
.highlight-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 16px 40px rgba(28,51,92,.08)}
.highlight-card .tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:#EEF5FF;color:var(--primary);font-size:12px;font-weight:800;margin-bottom:10px}
.highlight-card h3{margin:0 0 8px;font-size:19px}.highlight-card p{margin:0;color:var(--muted);font-size:15px}
.feature-section{padding:68px 0}.feature-section.alt{background:var(--soft)}
.feature-panel{display:grid;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.feature-panel.plain{box-shadow:none;background:transparent;border:0;padding:0}
.feature-content h2{font-size:30px;line-height:1.24;margin:0 0 14px;letter-spacing:-.02em}.feature-content p{color:var(--muted);margin:0 0 14px}
.check-list{display:grid;gap:10px;margin:20px 0 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:28px;color:#3F4B63}.check-list li:before{content:"";position:absolute;left:0;top:.62em;width:10px;height:10px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 5px #EAF3FF}
.image-card{background:linear-gradient(180deg,#F7FAFF,#EEF4FF);border-radius:26px;padding:18px;border:1px solid #DDE8F8;min-height:260px;display:flex;align-items:center;justify-content:center}
.image-card img{border-radius:22px;max-height:360px;object-fit:contain}
.vpn-connection-section .feature-panel{background:linear-gradient(180deg,#fff,#F7FAFF)}
.high-speed-section .speed-board{display:grid;gap:14px;margin-top:18px}.metric-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}.metric-card strong{font-size:22px;color:#152033}.metric-card span{display:block;color:var(--muted);font-size:14px;margin-top:2px}
.global-nodes-section .node-list{display:grid;gap:12px;margin-top:18px}.node-item{display:flex;gap:12px;align-items:flex-start;background:#F8FAFE;border:1px solid var(--line);border-radius:18px;padding:14px}.node-dot{width:12px;height:12px;border-radius:50%;background:var(--primary);margin-top:8px;box-shadow:0 0 0 6px #EAF3FF}.node-item h4{margin:0 0 4px}.node-item p{margin:0;color:var(--muted);font-size:14px}
.privacy-protection-section{background:linear-gradient(180deg,#fff,#F6F8FC)}
.privacy-layout{display:grid;gap:20px}.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-strip{display:grid;gap:14px}.policy-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;border-top:4px solid var(--primary)}.policy-card h3{margin:0 0 8px}.policy-card p{margin:0;color:var(--muted)}
.multi-device-section .device-grid{display:grid;gap:14px;margin-top:18px}.device-card{background:#F8FAFE;border:1px solid var(--line);border-radius:18px;padding:16px}.device-card h4{margin:0 0 4px}.device-card p{margin:0;color:var(--muted);font-size:14px}
.encryption-protocol-section .tech-panel{display:grid;gap:14px}.protocol-card{background:#172033;color:#fff;border-radius:22px;padding:20px;position:relative;overflow:hidden}.protocol-card:after{content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;background:rgba(41,128,254,.28)}.protocol-card h3{margin:0 0 8px}.protocol-card p{margin:0;color:rgba(255,255,255,.75)}
.process-steps{padding:68px 0;background:#fff}.steps-grid{display:grid;gap:14px}.step-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 12px 28px rgba(26,48,90,.06)}.step-num{width:34px;height:34px;border-radius:12px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:12px}.step-card h3{margin:0 0 8px}.step-card p{margin:0;color:var(--muted);font-size:15px}
.safety-panel{padding:68px 0;background:var(--soft)}.risk-grid{display:grid;gap:14px}.risk-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--primary);border-radius:20px;padding:18px}.risk-card h3{margin:0 0 8px;font-size:18px}.risk-card p{margin:0 0 8px;color:var(--muted);font-size:15px}.risk-card strong{display:block;color:#253148;font-size:14px;margin-top:10px}
.faq-section{padding:68px 0;background:#fff}.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{padding:70px 0;background:#fff}.cta-box{background:var(--gradient);color:#fff;border-radius:34px;padding:36px 22px;text-align:center;box-shadow:0 24px 70px rgba(75,91,225,.24);position:relative;overflow:hidden}.cta-box:before{content:"";position:absolute;width:220px;height:220px;right:-80px;top:-80px;background:rgba(255,255,255,.16);border-radius:50%}.cta-box h2{margin:0 0 10px;font-size:30px}.cta-box p{margin:0 auto 22px;max-width:680px;color:rgba(255,255,255,.84)}.cta-box .download-btn{background:var(--primary)}
.page-hero{padding:54px 0 34px;background:linear-gradient(180deg,#F7FAFF,#fff)}.page-hero-inner{display:grid;gap:16px;max-width:880px}.page-hero h1{font-size:36px;line-height:1.18;margin:0;letter-spacing:-.03em}.page-hero p{margin:0;color:var(--muted);font-size:17px}
.page-section{padding:42px 0 72px}.content-layout{display:grid;gap:22px}.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 14px 36px rgba(26,48,90,.06)}.article-card h2{font-size:24px;margin:0 0 12px}.article-card h3{font-size:19px;margin:24px 0 8px}.article-card p{color:var(--muted);margin:0 0 14px}.article-card ul,.article-card ol{margin:12px 0 0;padding-left:20px;color:#44516A}.article-card li{margin:8px 0}
.side-panel{background:#F8FAFE;border:1px solid var(--line);border-radius:24px;padding:20px;height:max-content}.side-panel h3{margin:0 0 12px}.side-panel a{display:block;padding:10px 0;color:var(--primary);font-weight:700;border-bottom:1px solid var(--line)}.side-panel a:last-child{border-bottom:0}.tip-box{background:#EEF5FF;border:1px solid #D6E7FF;border-radius:22px;padding:18px;margin-top:20px;color:#38506F}.check-panel{display:grid;gap:12px;margin-top:18px}.check-panel div{background:#F8FAFE;border:1px solid var(--line);border-radius:18px;padding:14px}.mini-grid{display:grid;gap:14px;margin:18px 0}.mini-card{background:#F8FAFE;border:1px solid var(--line);border-radius:20px;padding:16px}.mini-card h3{margin:0 0 6px;font-size:17px}.mini-card p{margin:0;color:var(--muted);font-size:15px}.download-line{margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}
.download-page .download-panel{text-align:center;max-width:860px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:var(--shadow)}.download-steps{display:grid;gap:14px;text-align:left;margin:26px 0}.download-step{background:#F8FAFE;border:1px solid var(--line);border-radius:18px;padding:16px}.download-step strong{color:#172033}.download-step p{margin:6px 0 0;color:var(--muted)}
.site-footer{background:#172033;color:#CDD6E5;padding:50px 0 0}.footer-grid{display:grid;gap:26px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px}.footer-brand img{width:36px;height:36px;border-radius:12px}.site-footer p{color:#AEBAD0;margin:14px 0 0}.site-footer h3{color:#fff;font-size:16px;margin:0 0 12px}.site-footer a{display:block;color:#AEBAD0;margin:8px 0}.site-footer a:hover{color:#fff}.footer-bottom{margin-top:34px;border-top:1px solid rgba(255,255,255,.1);padding:18px;text-align:center;color:#92A0B8;font-size:14px}
@media (min-width:640px){.highlight-grid{grid-template-columns:repeat(2,1fr)}.steps-grid,.risk-grid,.mini-grid,.download-steps{grid-template-columns:repeat(2,1fr)}.policy-strip,.privacy-cards,.device-grid,.tech-panel{grid-template-columns:repeat(2,1fr)}.hero-content h1{font-size:52px}.section-title{font-size:36px}.page-hero h1{font-size:44px}}
@media (min-width:900px){.nav-toggle-label{display:none}.site-nav{position:static;display:flex;align-items:center;gap:2px;background:transparent;border:0;border-radius:0;padding:0;box-shadow:none}.site-nav a{padding:9px 10px;font-size:14px}.hero-grid{grid-template-columns:1.05fr .95fr}.vpn-saas-hero{padding:76px 0 96px}.hero-content h1{font-size:60px}.highlight-grid{grid-template-columns:repeat(4,1fr)}.feature-panel{grid-template-columns:1fr 1fr;padding:34px}.feature-panel.reverse .feature-media{order:-1}.privacy-layout{grid-template-columns:1.15fr .85fr;align-items:center}.policy-strip{grid-template-columns:repeat(3,1fr)}.device-grid,.tech-panel{grid-template-columns:repeat(3,1fr)}.steps-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(4,1fr)}.content-layout{grid-template-columns:minmax(0,1fr) 300px;align-items:start}.footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}.section-title{font-size:40px}.feature-content h2{font-size:38px}.page-section{padding-top:52px}}
@media (min-width:1100px){.site-nav a{padding:9px 12px}.hero-device{width:430px}.steps-grid{grid-template-columns:repeat(6,1fr)}}
@media (max-width:380px){.container{width:min(100% - 24px,1120px)}.hero-content h1{font-size:35px}.section-title,.feature-content h2,.cta-box h2{font-size:27px}.download-btn{width:100%}.float-card{font-size:12px;padding:8px 10px}}