:root{
  --gradient: linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#1f2937;
  --muted:#667085;
  --light:#f5f7fb;
  --soft:#eef4ff;
  --border:#e5e9f2;
  --white:#ffffff;
  --radius:28px;
  --shadow:0 18px 50px rgba(31,41,55,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","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% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,233,242,.8)}
.header-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#111827;letter-spacing:-.02em}
.logo,.footer-logo{width:38px;height:38px;border-radius:12px;object-fit:cover}
.nav-toggle{display:none}.nav-toggle-label{display:flex;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:14px;background:#fff}.nav-toggle-label span{width:20px;height:2px;background:#222;border-radius:5px}
.main-nav{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);border-radius:22px;padding:12px;flex-direction:column}.main-nav a{padding:11px 14px;border-radius:14px;color:#344054;font-size:15px}.main-nav a:hover,.main-nav a.active{color:var(--blue);background:#edf5ff}.nav-toggle:checked~.main-nav{display:flex}
.section{padding:64px 0}.section-soft{background:var(--light)}.section-head{margin-bottom:26px}.section-eyebrow,.badge{display:inline-flex;align-items:center;border-radius:999px;background:#edf5ff;color:var(--blue);font-weight:700;font-size:13px;padding:6px 12px;margin-bottom:12px}.section h2,.page-hero h1,.vpn-saas-hero h1{line-height:1.16;letter-spacing:-.04em;margin:0 0 16px}.section h2{font-size:30px}.page-hero h1,.vpn-saas-hero h1{font-size:40px}.lead{font-size:17px;color:var(--muted);margin:0}.muted{color:var(--muted)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:var(--blue);color:#fff!important;font-weight:800;box-shadow:0 12px 28px rgba(41,128,254,.24);transition:.2s ease}.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.link-arrow{display:inline-flex;margin-top:12px;color:var(--blue);font-weight:800}.link-arrow::after{content:'›';margin-left:6px}
.vpn-saas-hero{position:relative;overflow:hidden;color:#fff;background:var(--gradient);border-bottom-left-radius:34px;border-bottom-right-radius:34px}.vpn-saas-hero::after{content:'';position:absolute;right:-18%;bottom:-35%;width:76%;height:70%;background:rgba(255,255,255,.14);transform:rotate(-12deg);border-radius:70px}.hero-grid{position:relative;z-index:1;display:grid;gap:36px;padding:64px 0 72px}.hero-copy p{color:rgba(255,255,255,.86);font-size:18px}.hero-copy .download-btn{margin:16px 0 18px;background:#2980FE}.hero-tags{display:flex;flex-wrap:wrap;gap:10px}.hero-tags span{padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);font-size:13px}.hero-visual{position:relative;min-height:330px;display:flex;align-items:center;justify-content:center}.device-card{position:relative;width:min(360px,90%);padding:18px;border-radius:34px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.28);box-shadow:0 26px 70px rgba(25,35,88,.28)}.device-card img{border-radius:26px;background:#fff}.float-label{position:absolute;background:#fff;color:#1f2937;border:1px solid var(--border);box-shadow:0 16px 40px rgba(31,41,55,.12);border-radius:999px;padding:8px 13px;font-weight:800;font-size:13px}.f1{top:24px;left:0}.f2{top:95px;right:-2px}.f3{bottom:80px;left:-8px}.f4{bottom:26px;right:10px}
.product-highlights{display:grid;gap:16px}.highlight-card,.feature-card,.risk-card,.faq-item,.step-card,.info-card{background:#fff;border:1px solid var(--border);border-radius:24px;padding:22px;box-shadow:0 12px 34px rgba(31,41,55,.05)}.highlight-card b,.feature-card h3,.risk-card h3,.faq-item h3,.step-card h3,.info-card h3{display:block;margin:0 0 8px}.card-tag{display:inline-flex;background:#edf5ff;color:var(--blue);border-radius:999px;padding:3px 9px;font-size:12px;font-weight:800;margin-bottom:10px}
.split-section{display:grid;gap:28px;align-items:center}.image-panel{background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--border);border-radius:32px;padding:20px;box-shadow:var(--shadow)}.image-panel img{border-radius:24px}.point-list{display:grid;gap:12px;margin:20px 0}.point-list span{display:flex;gap:10px;align-items:flex-start;color:#344054}.point-list span::before{content:'';width:9px;height:9px;border-radius:50%;background:var(--blue);margin-top:10px;flex:0 0 auto}
.high-speed-section .speed-card{background:linear-gradient(135deg,#f7fbff,#ffffff);border:1px solid var(--border);border-radius:34px;padding:24px;box-shadow:var(--shadow)}.speed-metrics{display:grid;gap:12px;margin-top:16px}.speed-metrics div{padding:14px;border-radius:18px;background:#fff;border:1px solid var(--border)}
.global-nodes-section .node-lines{display:grid;gap:14px}.node-lines div{background:#fff;border:1px solid var(--border);border-left:4px solid var(--blue);border-radius:18px;padding:14px}.privacy-protection-section .privacy-layout{display:grid;gap:22px}.privacy-cards,.no-log-grid,.protocol-grid,.risk-grid,.faq-grid,.related-grid{display:grid;gap:16px}.privacy-cards .info-card{box-shadow:none}.no-log-policy-section .wide-panel{background:#fff;border:1px solid var(--border);border-radius:32px;padding:24px;box-shadow:var(--shadow)}.multi-device-section .device-grid{display:grid;gap:16px}.device-mini{background:#fff;border:1px solid var(--border);border-radius:22px;padding:18px}.encryption-protocol-section .tech-panel{background:#101828;color:#fff;border-radius:34px;padding:26px}.encryption-protocol-section .tech-panel p{color:#d0d5dd}.protocol-chip{display:inline-flex;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);border-radius:999px;padding:6px 10px;margin:4px;font-size:13px}
.process-steps{display:grid;gap:16px}.step-num{display:inline-flex;width:36px;height:36px;border-radius:14px;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:900;margin-bottom:10px}.safety-panel{background:linear-gradient(135deg,#eef4ff,#fff);border:1px solid var(--border);border-radius:34px;padding:24px}.risk-card{border-top:4px solid var(--blue);box-shadow:none}.faq-item{box-shadow:none}.faq-item p{margin-bottom:0}.cta-section{padding:56px 0;background:var(--gradient);color:#fff;text-align:center;border-radius:34px;margin:40px auto;width:min(1120px,calc(100% - 32px))}.cta-section p{color:rgba(255,255,255,.86);margin:0 auto 22px;max-width:720px}.cta-section .download-btn{background:#2980FE}.page-hero{padding:52px 0 34px;background:linear-gradient(180deg,#f7faff,#fff)}.page-layout{display:grid;gap:24px}.article-card{background:#fff;border:1px solid var(--border);border-radius:30px;padding:24px;box-shadow:var(--shadow)}.article-card p{margin:0 0 16px}.side-card{background:#f8fbff;border:1px solid var(--border);border-radius:26px;padding:20px}.check-list{display:grid;gap:10px;margin:18px 0}.check-list li{list-style:none;background:#fff;border:1px solid var(--border);border-radius:16px;padding:12px}.steps-list{counter-reset:item;display:grid;gap:12px;padding:0;margin:18px 0}.steps-list li{counter-increment:item;list-style:none;background:#fff;border:1px solid var(--border);border-radius:18px;padding:14px}.steps-list li::before{content:counter(item);display:inline-flex;width:28px;height:28px;border-radius:10px;align-items:center;justify-content:center;background:#edf5ff;color:var(--blue);font-weight:900;margin-right:8px}.download-page .download-center{text-align:center;background:#fff;border:1px solid var(--border);border-radius:34px;padding:30px;box-shadow:var(--shadow)}
.site-footer{background:#111827;color:#d0d5dd;margin-top:36px}.footer-grid{display:grid;gap:26px;padding:44px 0}.site-footer h3{color:#fff;margin:0 0 10px}.site-footer a{display:block;color:#d0d5dd;padding:4px 0}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;display:flex;flex-direction:column;gap:8px;color:#98a2b3;font-size:14px}
@media (min-width:640px){.product-highlights,.privacy-cards,.no-log-grid,.protocol-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}.main-nav{display:flex;position:static;flex-direction:row;align-items:center;gap:4px;padding:0;border:0;box-shadow:none;background:transparent}.main-nav a{font-size:14px;padding:9px 11px}.hero-grid{grid-template-columns:1.02fr .98fr;align-items:center;padding:84px 0 96px}.vpn-saas-hero h1{font-size:58px}.page-hero h1{font-size:48px}.section h2{font-size:42px}.product-highlights{grid-template-columns:repeat(4,1fr)}.split-section,.privacy-layout,.page-layout{grid-template-columns:1fr 1fr}.page-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start}.global-nodes-section .split-section,.multi-device-section .split-section{grid-template-columns:.9fr 1.1fr}.risk-grid{grid-template-columns:repeat(4,1fr)}.faq-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}.footer-bottom{flex-direction:row;justify-content:space-between}.section{padding:88px 0}.cta-section{padding:74px 0}}
@media (min-width:1120px){.main-nav a{padding:10px 13px}.article-card{padding:34px}.hero-visual{min-height:430px}}