:root{
  --blue:#2980FE;
  --blue-hover:#1768E8;
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --text:#1f2937;
  --muted:#667085;
  --light:#f6f8fc;
  --line:#e6eaf2;
  --panel:#ffffff;
  --soft:#eef4ff;
  --shadow:0 18px 55px rgba(38,62,118,.12);
  --radius:28px;
}
*{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:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(230,234,242,.85)}
.nav-shell{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand,.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:#18233f;letter-spacing:.2px}.brand img,.footer-brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}.site-nav{display:none;position:absolute;left:14px;right:14px;top:72px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}.site-nav a{display:block;padding:11px 12px;border-radius:14px;color:#445066;font-weight:600;font-size:14px}.site-nav a:hover,.site-nav a.active{background:var(--soft);color:var(--blue)}.nav-toggle{position:absolute;opacity:0;pointer-events:none}.nav-toggle-label{display:flex;flex-direction:column;gap:5px;width:42px;height:42px;border:1px solid var(--line);border-radius:14px;align-items:center;justify-content:center;background:#fff}.nav-toggle-label span{width:18px;height:2px;background:#18233f;border-radius:2px}.nav-toggle:checked~.site-nav{display:block}
.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!important;font-weight:800;box-shadow:0 12px 28px rgba(41,128,254,.28);transition:.2s ease;white-space:nowrap}.download-btn:hover{background:var(--blue-hover);transform:translateY(-1px);box-shadow:0 16px 32px rgba(23,104,232,.32)}
.link-arrow{color:var(--blue);font-weight:800;display:inline-flex;gap:6px;align-items:center}.link-arrow:after{content:"→"}.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;color:var(--blue);background:#edf5ff;border:1px solid #d7e8ff;padding:6px 12px;border-radius:999px;font-weight:800;font-size:13px}.section-title{margin:0 0 14px;font-size:clamp(28px,4vw,44px);line-height:1.18;letter-spacing:-.8px}.section-lead{margin:0;color:var(--muted);font-size:17px}.section-pad{padding:64px 0}.gradient-bg{background:var(--gradient);color:#fff}.vpn-saas-hero{position:relative;padding:54px 0 60px;overflow:hidden}.vpn-saas-hero:before{content:"";position:absolute;inset:0;background:var(--gradient);clip-path:polygon(0 0,100% 0,100% 88%,0 100%);z-index:-2}.vpn-saas-hero:after{content:"";position:absolute;right:-120px;top:40px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.18);filter:blur(8px);z-index:-1}.hero-grid{display:grid;gap:34px;align-items:center}.hero-copy{color:#fff}.hero-copy h1{font-size:clamp(38px,8vw,68px);line-height:1.05;margin:18px 0 18px;letter-spacing:-1.8px}.hero-copy p{font-size:18px;max-width:660px;color:rgba(255,255,255,.9);margin:0 0 22px}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);color:#fff;padding:8px 12px;border-radius:999px;font-weight:700;font-size:13px}.hero-visual{position:relative;padding:20px}.product-frame{background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.75);border-radius:36px;padding:18px;box-shadow:0 30px 80px rgba(20,33,78,.26);transform:rotate(1deg)}.product-frame img{border-radius:26px;object-fit:cover;width:100%}.float-card{position:absolute;background:#fff;color:#243047;border-radius:18px;padding:10px 14px;box-shadow:0 14px 34px rgba(27,39,82,.18);font-weight:800;font-size:13px;border:1px solid #eef2f7}.float-card.one{left:0;top:8%}.float-card.two{right:0;top:22%}.float-card.three{left:6%;bottom:14%}.float-card.four{right:10%;bottom:2%}
.product-highlights{margin-top:-32px;position:relative;z-index:5}.highlight-grid{display:grid;grid-template-columns:1fr;gap:16px}.highlight-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:0 15px 36px rgba(38,62,118,.08)}.highlight-card .mini{display:inline-block;color:var(--blue);background:#edf5ff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:800;margin-bottom:12px}.highlight-card h3{margin:0 0 8px;font-size:20px}.highlight-card p{color:var(--muted);margin:0 0 12px}
.feature-panel{border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:28px}.feature-split{display:grid;gap:24px;align-items:center}.feature-split.reverse .feature-media{order:-1}.feature-media{position:relative;background:linear-gradient(145deg,#eef5ff,#fff);border-radius:28px;padding:18px;border:1px solid var(--line);overflow:hidden}.feature-media:after{content:"";position:absolute;inset:auto -30px -50px auto;width:160px;height:160px;background:#dfeaff;border-radius:50%;filter:blur(16px)}.feature-media img{position:relative;z-index:1;border-radius:22px}.feature-list{display:grid;gap:10px;margin:18px 0}.feature-list span,.check-list li{background:#f7f9fd;border:1px solid var(--line);border-radius:16px;padding:10px 12px;color:#40506a}.soft-section{background:var(--light)}.high-speed-section .speed-metrics{display:grid;gap:12px;margin-top:16px}.metric{background:#f8fbff;border:1px solid #dbeaff;border-radius:18px;padding:14px}.metric strong{display:block;color:#17233f}.global-nodes-section .node-tips,.privacy-cards,.policy-grid,.device-grid,.protocol-grid,.risk-grid,.faq-grid,.page-card-grid{display:grid;gap:16px}.node-tips .tip,.privacy-card,.policy-card,.device-card,.protocol-card,.risk-card,.faq-item,.page-card,.step-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px}.privacy-protection-section .privacy-shell{background:#fff;border:1px solid var(--line);border-radius:34px;padding:26px;box-shadow:var(--shadow)}.privacy-labels{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.privacy-labels span{background:#edf5ff;color:var(--blue);font-weight:800;border-radius:999px;padding:7px 12px}.no-log-policy-section .policy-card strong,.protocol-card strong,.risk-card strong,.step-card strong{display:block;margin-bottom:8px;color:#18233f}.multi-device-section .device-card b{display:block;color:var(--blue);margin-bottom:6px}.tech-panel{background:linear-gradient(135deg,#ffffff,#f4f7ff);border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}.process-steps{display:grid;gap:14px;margin-top:26px}.step-card{position:relative;padding-left:72px}.step-number{position:absolute;left:20px;top:20px;width:36px;height:36px;border-radius:14px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}.safety-panel{border-radius:34px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:26px}.risk-card{border-left:4px solid var(--blue)}.risk-card p{margin:6px 0;color:var(--muted)}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:var(--muted)}.cta-section{padding:64px 0;text-align:center}.cta-box{background:var(--gradient);color:#fff;border-radius:36px;padding:38px 24px;position:relative;overflow:hidden}.cta-box:before{content:"";position:absolute;left:-40px;top:-50px;width:200px;height:200px;background:rgba(255,255,255,.18);border-radius:50%}.cta-box h2{font-size:clamp(28px,5vw,44px);line-height:1.18;margin:0 0 12px}.cta-box p{color:rgba(255,255,255,.88);max-width:720px;margin:0 auto 22px}.page-hero{padding:58px 0 30px;background:linear-gradient(180deg,#f4f7ff,#fff)}.page-hero h1{font-size:clamp(34px,6vw,58px);line-height:1.08;margin:16px 0 16px;letter-spacing:-1.2px}.page-hero p{max-width:820px;color:var(--muted);font-size:18px;margin:0}.guide-layout{display:grid;gap:24px;align-items:start}.article-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:0 14px 42px rgba(38,62,118,.08)}.article-panel h2{margin:8px 0 12px;font-size:28px}.article-panel p{color:#46566d}.side-panel{display:grid;gap:16px}.note-box{background:#f7f9fd;border:1px solid var(--line);border-radius:24px;padding:20px}.note-box h3{margin:0 0 10px}.check-list{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}.page-download{margin-top:22px}.download-page .download-center{text-align:center;background:#fff;border:1px solid var(--line);border-radius:32px;padding:28px;box-shadow:var(--shadow)}.install-steps{counter-reset:item;display:grid;gap:14px;margin:24px 0}.install-steps li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 16px 16px 58px;position:relative}.install-steps li:before{counter-increment:item;content:counter(item);position:absolute;left:16px;top:16px;background:var(--blue);color:#fff;width:28px;height:28px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:800}.site-footer{background:#101828;color:#d5dbe8;margin-top:50px}.footer-grid{display:grid;gap:26px;padding:42px 0}.site-footer p{color:#aeb7ca;margin:12px 0 0}.site-footer h3{color:#fff;margin:0 0 12px;font-size:16px}.site-footer a{display:block;color:#d5dbe8;margin:8px 0}.footer-brand{color:#fff}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding:18px;color:#aeb7ca;font-size:14px}.table-like{display:grid;gap:10px}.table-row{display:grid;gap:8px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}.table-row strong{color:#18233f}.muted{color:var(--muted)}
@media (min-width:680px){.highlight-grid{grid-template-columns:repeat(2,1fr)}.privacy-cards,.policy-grid,.device-grid,.protocol-grid,.risk-grid,.faq-grid,.page-card-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.table-row{grid-template-columns:180px 1fr}.hero-grid{grid-template-columns:1fr 1fr}.feature-split{grid-template-columns:1fr 1fr}.feature-split.reverse .feature-media{order:0}}
@media (min-width:980px){.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{font-size:14px;padding:9px 10px}.vpn-saas-hero{padding:78px 0 96px}.highlight-grid{grid-template-columns:repeat(4,1fr)}.section-pad{padding:86px 0}.hero-copy p{font-size:19px}.feature-panel{padding:38px}.guide-layout{grid-template-columns:minmax(0,1fr) 330px}.article-panel{padding:34px}.risk-grid{grid-template-columns:repeat(4,1fr)}.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}.protocol-grid,.privacy-cards,.policy-grid,.device-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:420px){.container{width:min(100% - 26px,1120px)}.nav-shell{width:min(100% - 22px,1180px)}.download-btn{width:100%;padding-left:18px;padding-right:18px}.float-card{font-size:12px;padding:8px 10px}.product-frame{padding:12px;border-radius:28px}.feature-panel,.privacy-shell,.safety-panel,.cta-box,.article-panel{border-radius:24px}.section-pad{padding:52px 0}.hero-copy h1{font-size:38px}.hero-visual{padding:10px}.site-nav{left:10px;right:10px}}