*{box-sizing:border-box}
:root{
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#1f2937;
  --muted:#667085;
  --line:#e6ebf2;
  --soft:#f5f8fc;
  --soft-blue:#eef5ff;
  --white:#fff;
  --shadow:0 18px 50px rgba(26,54,93,.10);
  --radius:24px;
}
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:1.72;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;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(18px);border-bottom:1px solid rgba(230,235,242,.9)}
.header-inner{width:min(1160px,calc(100% - 28px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#172033}
.brand-logo{width:38px;height:38px;border-radius:12px;object-fit:cover}
.brand-text{font-size:18px}
.site-nav{display:none;position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:12px}
.site-nav a{display:block;padding:11px 14px;color:#445064;border-radius:12px;font-weight:650}
.site-nav a:hover,.site-nav a.active{background:var(--soft-blue);color:var(--blue)}
.nav-toggle{display:none}
.nav-toggle-label{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;gap:5px;align-items:center;justify-content:center;background:#fff}
.nav-toggle-label span{width:18px;height:2px;background:#2d3648;border-radius:6px}
.nav-toggle:checked~.site-nav{display:block}
.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 14px 28px rgba(41,128,254,.25);transition:.2s ease;border:0}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#edf5ff;color:var(--blue);font-size:13px;font-weight:800}
.section{padding:68px 0}
.section-soft{background:var(--soft)}
.section-head{max-width:760px;margin:0 auto 30px;text-align:center}
.section-head h2{font-size:30px;line-height:1.25;margin:12px 0}
.section-head p{color:var(--muted);margin:0}
.vpn-dashboard-hero{background:var(--gradient);color:#fff;padding:64px 0 72px;position:relative;overflow:hidden}
.vpn-dashboard-hero:before{content:"";position:absolute;inset:auto -10% -35% -10%;height:260px;background:rgba(255,255,255,.16);filter:blur(38px)}
.hero-grid{position:relative;display:grid;gap:32px;align-items:center}
.hero-copy h1{font-size:38px;line-height:1.15;margin:14px 0 16px;letter-spacing:-.04em}
.hero-copy p{color:rgba(255,255,255,.88);font-size:17px;margin:0 0 22px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags span,.status-card{border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.15);backdrop-filter:blur(12px);border-radius:999px;padding:7px 12px;color:#fff;font-size:13px;font-weight:700}
.hero-panel{position:relative;min-height:360px}
.hero-device{position:relative;margin:0 auto;max-width:380px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);border-radius:34px;padding:18px;box-shadow:0 30px 70px rgba(19,31,81,.26)}
.hero-device img{border-radius:26px;background:#fff}
.status-stack{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.status-card{border-radius:18px;text-align:center}
.service-index{margin-top:-36px;position:relative;z-index:2}
.service-grid{display:grid;gap:14px}
.service-card,.info-card,.risk-card,.faq-item,.step-card,.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 34px rgba(23,32,51,.06);padding:22px}
.service-card strong{display:block;margin:10px 0 4px;font-size:18px}
.service-card p,.info-card p,.risk-card p,.feature-card p,.step-card p,.faq-item p{color:var(--muted);margin:0}
.card-link{display:inline-flex;margin-top:12px;color:var(--blue);font-weight:800}
.vpn-connection-section,.global-nodes-section,.high-speed-section,.privacy-protection-section,.multi-device-section,.no-log-policy-section,.encryption-protocol-section{padding:72px 0}
.split-card{display:grid;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}
.split-card.alt{background:#f8fbff}
.split-content h2,.panel-title h2{font-size:30px;line-height:1.25;margin:10px 0 14px}
.split-content p,.panel-title p{color:var(--muted)}
.point-list{display:grid;gap:10px;margin:18px 0 18px;padding:0;list-style:none}
.point-list li{padding:12px 14px;border-radius:16px;background:var(--soft);border:1px solid var(--line)}
.visual-card{border-radius:28px;background:linear-gradient(180deg,#f7fbff,#fff);border:1px solid var(--line);padding:18px}
.visual-card img{border-radius:22px;margin:auto}
.category-grid,.info-grid,.risk-grid,.process-steps,.faq-grid{display:grid;gap:16px}
.category-grid{grid-template-columns:1fr}
.info-card .mini-title{font-weight:850;margin-bottom:6px}
.safety-panel{background:linear-gradient(135deg,#f8fbff,#fff);border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}
.safety-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.safety-tags span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#42526b;font-weight:700;font-size:13px}
.process-steps{counter-reset:step}
.step-card{position:relative;padding-top:56px}
.step-card:before{counter-increment:step;content:counter(step);position:absolute;top:18px;left:22px;width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.risk-card{border-left:4px solid var(--blue)}
.risk-card strong{display:block;font-size:17px;margin-bottom:6px}
.cta-section{padding:62px 0;background:var(--gradient);color:#fff;text-align:center}
.cta-box{width:min(760px,calc(100% - 32px));margin:0 auto}
.cta-box p{color:rgba(255,255,255,.88)}
.page-hero{background:linear-gradient(180deg,#f5f8ff,#fff);padding:56px 0 34px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:34px;line-height:1.2;margin:12px 0 12px}
.page-hero p{max-width:760px;color:var(--muted);margin:0}
.page-layout{display:grid;gap:24px;padding:46px 0 72px}
.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.article-card h2{font-size:24px;margin:6px 0 12px}
.article-card h3{font-size:19px;margin:22px 0 8px}
.article-card p,.article-card li{color:#566273}
.article-card ul,.article-card ol{padding-left:22px}
.sidebar-panel{background:#f8fbff;border:1px solid var(--line);border-radius:28px;padding:22px;height:max-content}
.sidebar-panel a{display:block;color:var(--blue);font-weight:800;margin-top:10px}
.download-line{margin-top:24px}
.download-page-card{text-align:center}
.download-page-card .download-btn{margin:8px auto 22px}
.faq-item h2,.faq-item h3{font-size:18px;margin:0 0 8px}
.site-footer{background:#101828;color:#d0d5dd;padding:52px 0 0}
.footer-grid{display:grid;gap:26px}
.footer-brand img{width:38px;height:38px;border-radius:12px}
.footer-brand span{color:#fff;font-weight:900}
.site-footer h3{color:#fff;margin:0 0 12px;font-size:17px}
.site-footer a{display:block;color:#d0d5dd;margin:7px 0}
.site-footer p{color:#aab4c3;margin:10px 0 0}
.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.12);padding:18px;margin-top:34px;color:#98a2b3;font-size:14px}
@media (min-width:700px){
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .category-grid,.info-grid,.risk-grid,.process-steps,.faq-grid{grid-template-columns:repeat(2,1fr)}
  .hero-copy h1{font-size:48px}
}
@media (min-width:980px){
  .nav-toggle-label{display:none}
  .site-nav{display:flex;position:static;align-items:center;gap:4px;background:transparent;border:0;box-shadow:none;padding:0}
  .site-nav a{padding:9px 11px;font-size:14px}
  .hero-grid{grid-template-columns:1.04fr .96fr}
  .vpn-dashboard-hero{padding:82px 0 92px}
  .hero-copy h1{font-size:56px}
  .service-grid{grid-template-columns:repeat(4,1fr)}
  .service-card:first-child,.service-card:nth-child(4){grid-column:span 2}
  .split-card{grid-template-columns:1.05fr .95fr;padding:34px}
  .split-card.reverse .visual-card{order:-1}
  .privacy-protection-section .split-card,.encryption-protocol-section .split-card{grid-template-columns:.85fr 1.15fr}
  .info-grid{grid-template-columns:repeat(3,1fr)}
  .risk-grid{grid-template-columns:repeat(4,1fr)}
  .process-steps{grid-template-columns:repeat(3,1fr)}
  .faq-grid{grid-template-columns:repeat(2,1fr)}
  .page-layout{grid-template-columns:minmax(0,1fr) 310px;align-items:start}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}
}
@media (max-width:420px){
  .container{width:min(100% - 24px,1120px)}
  .hero-copy h1,.page-hero h1{font-size:32px}
  .section{padding:52px 0}
  .split-card,.article-card,.safety-panel{padding:18px;border-radius:22px}
  .download-btn{width:100%}
  .status-stack{grid-template-columns:1fr}
}