:root{
  --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#1F2937;
  --muted:#64748B;
  --light:#F6F8FC;
  --line:#E6EBF3;
  --panel:#FFFFFF;
  --deep:#111827;
  --radius:28px;
  --shadow:0 20px 55px rgba(37,54,100,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
p{margin:0 0 14px;color:var(--muted)}
h1,h2,h3{margin:0;color:var(--deep);line-height:1.25}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(230,235,243,.92)}
.header-inner{max-width:1180px;margin:0 auto;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#172033;font-size:18px;white-space:nowrap}
.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;gap:4px;align-items:center}
.site-nav a{padding:10px 12px;border-radius:999px;color:#475569;font-size:14px;font-weight:600}
.site-nav a:hover{background:#EFF5FF;color:var(--blue)}
.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:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#fff}
.nav-toggle-label span{width:18px;height:2px;border-radius:4px;background:#243044}
.nav-toggle:checked ~ .site-nav{display:flex;position:absolute;left:16px;right:16px;top:70px;flex-direction:column;align-items:stretch;padding:14px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
.nav-toggle:checked ~ .site-nav a{padding:12px 14px}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.section{padding:72px 0}
.section-soft{background:var(--light)}
.section-head{margin-bottom:26px;max-width:760px}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.section-eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:999px;background:#EDF5FF;color:var(--blue);font-weight:800;font-size:13px;margin-bottom:12px}
.section-head h2{font-size:30px;letter-spacing:-.02em;margin-bottom:12px}
.section-head p{font-size:16px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:#2980FE;color:#fff!important;font-weight:800;box-shadow:0 12px 28px rgba(41,128,254,.25);transition:.2s ease;border:0;cursor:pointer;white-space:nowrap}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.text-link{display:inline-flex;align-items:center;color:var(--blue);font-weight:800;margin-top:8px}
.text-link:hover{color:var(--blue-dark)}
.gradient-bg{background:var(--gradient);color:#fff}
.vpn-saas-hero{position:relative;overflow:hidden;margin:0 0 24px;padding:54px 0 70px;background:var(--gradient)}
.vpn-saas-hero:after{content:"";position:absolute;left:-5%;right:-5%;bottom:-70px;height:150px;background:#fff;transform:skewY(-4deg);transform-origin:left top}
.hero-grid{position:relative;z-index:1;display:grid;gap:34px;align-items:center}
.hero-content h1{font-size:40px;color:#fff;letter-spacing:-.04em;margin-bottom:16px}
.hero-content p{color:rgba(255,255,255,.88);font-size:17px;max-width:640px}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:26px 0}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap}
.hero-tags span{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.22);color:#fff;font-size:13px;font-weight:700}
.hero-visual{position:relative;min-height:320px;display:flex;align-items:center;justify-content:center}
.hero-card{position:relative;width:min(430px,100%);padding:20px;border-radius:36px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);box-shadow:0 30px 80px rgba(21,28,70,.24);backdrop-filter:blur(12px)}
.hero-card img{border-radius:26px;background:#fff;margin:auto;max-height:420px;object-fit:contain}
.float-label{position:absolute;padding:10px 13px;border-radius:16px;background:#fff;color:#243044;font-size:13px;font-weight:800;box-shadow:0 15px 35px rgba(15,23,42,.18)}
.float-label.one{left:-6px;top:28px}.float-label.two{right:-8px;top:80px}.float-label.three{left:18px;bottom:24px}.float-label.four{right:14px;bottom:74px}
.product-highlights{position:relative;z-index:2;margin-top:-36px}
.highlight-grid{display:grid;gap:16px}
.highlight-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
.highlight-card .tag{display:inline-flex;padding:5px 9px;border-radius:999px;background:#EDF5FF;color:var(--blue);font-size:12px;font-weight:800;margin-bottom:12px}
.highlight-card h3{font-size:18px;margin-bottom:8px}
.feature-panel{display:grid;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.feature-panel.reverse .feature-image{order:-1}
.feature-copy h2{font-size:30px;margin-bottom:14px}
.feature-list{display:grid;gap:10px;margin:18px 0 8px;padding:0;list-style:none}
.feature-list li{position:relative;padding-left:26px;color:#475569}
.feature-list li:before{content:"";position:absolute;left:0;top:11px;width:10px;height:10px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #EAF3FF}
.feature-image{background:linear-gradient(180deg,#F4F8FF,#FFFFFF);border:1px solid var(--line);border-radius:28px;padding:22px;min-height:260px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.feature-image img{max-height:360px;object-fit:contain}
.high-speed-section .feature-panel{background:linear-gradient(180deg,#F8FBFF,#fff)}
.speed-metrics{display:grid;gap:12px;margin-top:18px}
.metric{padding:15px;border:1px solid var(--line);border-radius:18px;background:#fff}
.metric strong{display:block;color:#1E293B;font-size:15px}.metric span{color:var(--muted);font-size:13px}
.global-nodes-section .node-grid{display:grid;gap:16px;margin-top:18px}
.node-card{padding:17px;border-radius:20px;border:1px solid var(--line);background:#F8FAFC}
.privacy-protection-section{background:#F6F8FC}
.privacy-layout{display:grid;gap:22px;align-items:center}
.privacy-cards{display:grid;gap:14px}
.privacy-card,.policy-card,.protocol-card{padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 34px rgba(37,54,100,.06)}
.privacy-card h3,.policy-card h3,.protocol-card h3{font-size:18px;margin-bottom:8px}
.no-log-policy-section .policy-grid,.encryption-protocol-section .protocol-grid{display:grid;gap:16px}
.multi-device-section .device-grid{display:grid;gap:16px;margin-top:16px}
.device-card{padding:18px;border:1px solid var(--line);border-radius:20px;background:#fff}
.process-steps{display:grid;gap:14px}
.step-card{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:flex-start;padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 28px rgba(37,54,100,.06)}
.step-num{width:38px;height:38px;border-radius:14px;background:var(--gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}
.safety-panel{padding:24px;border-radius:30px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.risk-grid{display:grid;gap:16px}
.risk-card{padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue)}
.risk-card h3{font-size:17px;margin-bottom:8px}.risk-card strong{display:block;color:#243044;margin-top:8px}
.faq-list{display:grid;gap:14px}.faq-item{padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line)}.faq-item h3{font-size:17px;margin-bottom:8px}
.cta-section{padding:72px 0;background:var(--gradient);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-section h2{color:#fff;font-size:32px;margin-bottom:12px}.cta-section p{color:rgba(255,255,255,.86);max-width:680px;margin:0 auto 24px}
.page-hero{padding:58px 0 38px;background:linear-gradient(180deg,#F5F8FF,#fff)}
.page-hero h1{font-size:36px;letter-spacing:-.03em;margin-bottom:14px}.page-hero p{max-width:780px;font-size:17px}
.content-layout{display:grid;gap:22px;align-items:start}.article-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}
.article-panel h2{font-size:24px;margin:26px 0 12px}.article-panel h2:first-child{margin-top:0}.article-panel ul,.article-panel ol{color:#475569;padding-left:22px}.article-panel li{margin-bottom:8px}
.side-panel{background:#F8FAFC;border:1px solid var(--line);border-radius:26px;padding:22px;position:sticky;top:92px}.side-panel h3{font-size:18px;margin-bottom:10px}.side-panel a{display:block;color:var(--blue);font-weight:700;margin-top:10px}
.check-grid{display:grid;gap:14px;margin:18px 0}.check-card{padding:17px;border-radius:20px;background:#F8FAFC;border:1px solid var(--line)}.check-card h3{font-size:17px;margin-bottom:6px}
.download-card{background:#fff;border:1px solid var(--line);border-radius:32px;padding:26px;box-shadow:var(--shadow)}
.download-steps{counter-reset:item;display:grid;gap:14px;margin:24px 0}.download-step{padding:18px;border:1px solid var(--line);border-radius:20px;background:#F8FAFC}.download-step h3{font-size:17px;margin-bottom:6px}
.site-footer{background:#101827;color:#E5E7EB;padding:54px 0 0}.site-footer p{color:#B6C0D1}.footer-grid{display:grid;gap:28px}.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}.footer-brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}.site-footer h3{color:#fff;font-size:16px;margin-bottom:12px}.site-footer a{display:block;color:#B6C0D1;margin:8px 0}.site-footer a:hover{color:#fff}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.08);padding:18px;margin-top:36px;color:#94A3B8;font-size:13px}
@media (min-width:640px){.highlight-grid{grid-template-columns:repeat(2,1fr)}.risk-grid,.policy-grid,.protocol-grid,.device-grid,.check-grid,.speed-metrics,.global-nodes-section .node-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.page-hero h1{font-size:44px}}
@media (min-width:900px){.nav-toggle-label{display:none}.site-nav{display:flex}.hero-grid{grid-template-columns:1.02fr .98fr}.hero-content h1{font-size:58px}.vpn-saas-hero{padding:78px 0 110px}.highlight-grid{grid-template-columns:repeat(4,1fr)}.feature-panel{grid-template-columns:1fr 1fr;padding:34px}.feature-panel.reverse .feature-image{order:initial}.privacy-layout{grid-template-columns:1.05fr .95fr}.privacy-cards{grid-template-columns:repeat(3,1fr)}.no-log-policy-section .policy-grid,.encryption-protocol-section .protocol-grid{grid-template-columns:repeat(3,1fr)}.multi-device-section .device-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) 320px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}.section-head h2,.feature-copy h2{font-size:38px}.section{padding:90px 0}}
@media (max-width:420px){.container{width:min(100% - 28px,1120px)}.hero-content h1{font-size:34px}.section-head h2,.feature-copy h2,.cta-section h2{font-size:28px}.float-label{position:static;display:inline-flex;margin:6px}.hero-card{padding:16px}.download-btn{width:100%}.hero-actions{align-items:stretch}.hero-tags span{font-size:12px}.article-panel,.download-card,.safety-panel{padding:20px;border-radius:24px}}