:root{
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --ink:#1f2937;
  --text:#4b5563;
  --muted:#6b7280;
  --line:#e5e7eb;
  --soft:#f6f8fc;
  --soft-blue:#eef5ff;
  --white:#fff;
  --radius:24px;
  --shadow:0 18px 45px rgba(31,41,55,.10);
}
*{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;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:30;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(229,231,235,.8)}
.nav-container{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--ink)}
.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover;box-shadow:0 6px 18px rgba(41,128,254,.18)}
.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{padding:10px 12px;border-radius:999px;color:#374151;font-size:14px;font-weight:600}
.main-nav a:hover,.main-nav a.active{color:var(--blue);background:#eef5ff}
.nav-toggle{display:none}
.nav-toggle-label{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:14px;align-items:center;justify-content:center;flex-direction:column;gap:5px;background:#fff}
.nav-toggle-label span{width:18px;height:2px;background:#1f2937;border-radius:2px}
.section{padding:68px 0}
.section-soft{background:var(--soft)}
.section-title{max-width:760px;margin:0 auto 28px;text-align:center}
.section-title .eyebrow,.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-weight:800;font-size:13px;margin-bottom:12px}
h1,h2,h3{color:var(--ink);line-height:1.22;margin:0 0 14px}
h1{font-size:clamp(34px,7vw,62px);letter-spacing:-.04em}
h2{font-size:clamp(26px,4vw,42px);letter-spacing:-.03em}
h3{font-size:20px}.lead{font-size:18px;color:#eaf1ff;max-width:640px}.muted{color:var(--muted)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 24px;border-radius:999px;background:#2980FE;color:#fff!important;font-weight:800;box-shadow:0 12px 24px rgba(41,128,254,.25);transition:.2s ease;border:0;cursor:pointer;white-space:nowrap}
.download-btn:hover{background:#1768E8;transform:translateY(-1px);box-shadow:0 16px 28px rgba(41,128,254,.30)}
.text-link{display:inline-flex;align-items:center;color:var(--blue);font-weight:800;margin-top:12px}.text-link:after{content:"→";margin-left:6px}
.vpn-network-hero{position:relative;overflow:hidden;color:#fff;background:var(--gradient);padding:70px 0 76px}
.vpn-network-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(255,255,255,.28),transparent 26%),radial-gradient(circle at 76% 28%,rgba(255,255,255,.18),transparent 22%),linear-gradient(120deg,rgba(255,255,255,.14) 1px,transparent 1px);background-size:auto,auto,70px 70px;opacity:.78}
.hero-grid{position:relative;z-index:1;display:grid;gap:34px;align-items:center}.hero-copy p{margin:0 0 22px}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.hero-tags span,.status-card{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);color:#fff;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700;backdrop-filter:blur(10px)}
.hero-visual{position:relative;min-height:340px;display:flex;align-items:center;justify-content:center}.hero-device{width:min(420px,86%);filter:drop-shadow(0 28px 40px rgba(29,31,75,.32));border-radius:30px}.status-card{position:absolute;box-shadow:0 12px 35px rgba(29,31,75,.18)}.status-card.one{top:18px;left:8px}.status-card.two{top:54px;right:16px}.status-card.three{bottom:50px;left:6px}.status-card.four{bottom:20px;right:30px}
.node-overview{margin-top:-38px;position:relative;z-index:2}.overview-grid{display:grid;gap:16px}.node-card,.card,.risk-card,.step-card,.faq-item,.policy-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 32px rgba(31,41,55,.06)}.node-card .tag{display:inline-block;color:var(--blue);background:#eef5ff;border-radius:999px;padding:4px 10px;font-weight:800;font-size:12px;margin-bottom:10px}.node-card p{margin:0;color:var(--muted)}
.split{display:grid;gap:28px;align-items:center}.feature-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:28px;box-shadow:var(--shadow)}.feature-panel ul{padding-left:20px;margin:14px 0}.image-shell{position:relative;background:linear-gradient(135deg,#eef5ff,#fff);border:1px solid var(--line);border-radius:32px;padding:22px;box-shadow:var(--shadow);overflow:hidden}.image-shell:after{content:"";position:absolute;inset:auto -30px -60px auto;width:160px;height:160px;border-radius:50%;background:rgba(41,128,254,.12)}
.global-nodes-section{position:relative;background:#f7f9ff;overflow:hidden}.global-nodes-section:before{content:"";position:absolute;inset:30px;background-image:radial-gradient(#2980FE 1.5px,transparent 1.5px);background-size:34px 34px;opacity:.14}.map-card{position:relative;background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:32px;padding:28px;box-shadow:var(--shadow)}.mini-grid{display:grid;gap:14px;margin-top:18px}.mini-grid div{padding:16px;border-radius:18px;background:#f8fafc;border:1px solid #edf0f4}
.speed-lines{display:grid;gap:14px}.speed-line{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}.bar{height:10px;flex:1;border-radius:999px;background:linear-gradient(90deg,#2980FE,#b8d7ff)}
.privacy-protection-section .security-panel,.tech-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:26px;box-shadow:var(--shadow)}.security-list{display:grid;gap:12px}.security-list span{display:block;border-left:4px solid var(--blue);background:#f8fafc;border-radius:14px;padding:12px 14px;color:#374151;font-weight:700}.policy-grid,.risk-grid,.faq-grid,.cards-grid{display:grid;gap:16px}.policy-card strong,.risk-card strong{display:block;color:var(--ink);margin-bottom:8px}.policy-card{box-shadow:none}.device-grid{display:grid;gap:16px}.device-card{border:1px solid var(--line);border-radius:22px;padding:18px;background:#fff}.device-card b{color:var(--ink)}
.process-steps{display:grid;gap:16px}.step-card{position:relative;padding-left:72px}.step-no{position:absolute;left:20px;top:22px;width:36px;height:36px;border-radius:12px;background:#eef5ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900}.risk-card{box-shadow:none;border-left:4px solid var(--blue)}.risk-card p{margin:6px 0}.faq-item{box-shadow:none}.faq-item summary{cursor:pointer;color:var(--ink);font-weight:800}.faq-item p{margin:10px 0 0;color:var(--muted)}
.cta-section{padding:64px 0;background:var(--gradient);color:#fff;text-align:center;position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 25% 20%,rgba(255,255,255,.20),transparent 24%),radial-gradient(circle at 75% 80%,rgba(255,255,255,.18),transparent 24%)}.cta-section .container{position:relative}.cta-section h2{color:#fff}.cta-section p{color:#eef4ff;max-width:720px;margin:0 auto 22px}
.page-hero{padding:58px 0;background:linear-gradient(180deg,#f5f8ff 0%,#fff 100%);border-bottom:1px solid var(--line)}.page-hero .container{max-width:960px}.badge{display:inline-flex;background:#eef5ff;color:var(--blue);border-radius:999px;padding:6px 13px;font-weight:900;font-size:13px;margin-bottom:14px}.content-layout{display:grid;gap:22px;align-items:start}.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 14px 34px rgba(31,41,55,.06)}.article-card p{margin:0 0 14px}.check-list{display:grid;gap:12px;margin:18px 0}.check-list li{list-style:none;background:#f8fafc;border:1px solid #edf0f4;border-radius:16px;padding:12px 14px}.side-panel{background:#f8fafc;border:1px solid var(--line);border-radius:24px;padding:20px;position:sticky;top:88px}.side-panel a{display:block;color:var(--blue);font-weight:800;margin:10px 0}.only-download{margin-top:20px}
.download-steps{counter-reset:step;display:grid;gap:14px;margin:22px 0}.download-steps li{list-style:none;counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 16px 16px 58px;position:relative}.download-steps li:before{content:counter(step);position:absolute;left:16px;top:17px;width:28px;height:28px;border-radius:10px;background:#eef5ff;color:var(--blue);font-weight:900;display:flex;align-items:center;justify-content:center}
.site-footer{background:#111827;color:#cbd5e1;padding:46px 0 0}.footer-grid{display:grid;gap:26px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:20px;margin-bottom:12px}.footer-brand img{width:36px;height:36px;border-radius:10px}.site-footer h3{color:#fff;font-size:16px}.site-footer a{display:block;color:#cbd5e1;margin:8px 0}.site-footer a:hover{color:#fff}.footer-bottom{margin-top:34px;border-top:1px solid rgba(255,255,255,.10);text-align:center;padding:18px;color:#94a3b8;font-size:14px}
@media (max-width:860px){.nav-toggle-label{display:flex}.main-nav{position:absolute;left:14px;right:14px;top:66px;display:none;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}.main-nav a{padding:12px 14px}.nav-toggle:checked~.main-nav{display:flex}.hero-visual{min-height:300px}.status-card{font-size:12px}.section{padding:52px 0}.side-panel{position:static}.article-card{padding:20px}.download-btn{width:auto;min-width:150px}}
@media (min-width:640px){.overview-grid,.policy-grid,.risk-grid,.cards-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}.device-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.hero-grid,.split{grid-template-columns:1.04fr .96fr}.overview-grid{grid-template-columns:repeat(4,1fr)}.mini-grid{grid-template-columns:repeat(3,1fr)}.policy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.faq-grid{grid-template-columns:repeat(2,1fr)}.content-layout{grid-template-columns:minmax(0,1fr) 300px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}.process-steps{grid-template-columns:repeat(3,1fr)}.section{padding:82px 0}.hero-copy{padding-right:12px}}