:root{
  --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#172033;
  --muted:#657085;
  --light:#F5F7FB;
  --line:#E6EAF2;
  --panel:#FFFFFF;
  --soft:#EEF4FF;
  --radius:28px;
  --shadow:0 18px 48px rgba(28,45,92,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","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(14px);border-bottom:1px solid rgba(230,234,242,.9)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#172033;white-space:nowrap}
.brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.nav-toggle{display:none}
.nav-toggle-label{display:flex;flex-direction:column;gap:5px;padding:9px;border:1px solid var(--line);border-radius:14px;background:#fff;cursor:pointer}
.nav-toggle-label span{width:22px;height:2px;background:#26324A;border-radius:8px}
.main-nav{position:absolute;left:14px;right:14px;top:72px;display:none;flex-direction:column;gap:4px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.main-nav a{padding:10px 12px;border-radius:12px;color:#465168;font-size:15px}
.main-nav a:hover,.main-nav a.active{background:var(--soft);color:var(--blue)}
.nav-toggle:checked~.main-nav{display:flex}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:999px;background:var(--blue);color:#fff!important;font-weight:800;letter-spacing:.02em;box-shadow:0 12px 30px rgba(41,128,254,.24);transition:transform .2s ease,background .2s ease,box-shadow .2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 16px 34px rgba(23,104,232,.28)}
.section{padding:72px 0}
.section-muted{background:var(--light)}
.section-title{max-width:760px;margin:0 auto 30px;text-align:center}
.section-title .eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;margin-bottom:12px;padding:5px 12px;border-radius:999px;background:var(--soft);color:var(--blue);font-size:13px;font-weight:800}
.section-title h2,.page-hero h1{margin:0 0 12px;font-size:30px;line-height:1.25;letter-spacing:-.03em}
.section-title p,.page-hero p{margin:0;color:var(--muted)}
.vpn-saas-hero{position:relative;padding:58px 0 72px;overflow:hidden;background:var(--gradient);color:#fff}
.vpn-saas-hero:after{content:"";position:absolute;left:-8%;right:-8%;bottom:-70px;height:150px;background:#fff;transform:skewY(-4deg);transform-origin:left top}
.hero-inner{position:relative;z-index:2;width:min(1180px,calc(100% - 36px));margin:0 auto;display:grid;gap:32px;align-items:center}
.hero-copy h1{font-size:40px;line-height:1.12;margin:0 0 18px;letter-spacing:-.04em}
.hero-copy p{font-size:17px;color:rgba(255,255,255,.88);margin:0 0 24px;max-width:620px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags span{padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);font-size:13px;color:#fff}
.hero-visual{position:relative;min-height:360px;border-radius:36px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);padding:22px;box-shadow:0 30px 80px rgba(11,22,68,.20)}
.hero-visual img{width:78%;margin:18px auto 0;border-radius:28px;filter:drop-shadow(0 24px 34px rgba(20,30,80,.25))}
.float-card{position:absolute;padding:10px 14px;border-radius:16px;background:rgba(255,255,255,.94);color:#25304A;font-weight:800;font-size:13px;box-shadow:0 12px 26px rgba(14,31,82,.16)}
.float-card.one{left:18px;top:28px}.float-card.two{right:18px;top:80px}.float-card.three{left:24px;bottom:74px}.float-card.four{right:20px;bottom:26px}
.product-highlights{position:relative;z-index:4;margin-top:-32px;padding-bottom:42px}
.highlight-grid{display:grid;gap:16px}
.highlight-card,.info-card,.risk-card,.faq-item,.step-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 12px 30px rgba(35,49,91,.06)}
.highlight-card .label{display:inline-flex;margin-bottom:12px;padding:4px 10px;border-radius:999px;background:var(--soft);color:var(--blue);font-size:12px;font-weight:800}
.highlight-card h3,.info-card h3,.risk-card h3,.step-card h3{margin:0 0 8px;font-size:19px}
.highlight-card p,.info-card p,.risk-card p,.step-card p{margin:0;color:var(--muted)}
.text-link{display:inline-flex;margin-top:14px;color:var(--blue);font-weight:800}
.feature-split{display:grid;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:36px;padding:24px;box-shadow:var(--shadow)}
.feature-split.reverse .feature-image{order:-1}
.feature-copy h2{margin:0 0 14px;font-size:28px;line-height:1.25;letter-spacing:-.03em}
.feature-copy p{margin:0 0 16px;color:var(--muted)}
.feature-copy ul{margin:18px 0 0;padding:0;list-style:none;display:grid;gap:10px}
.feature-copy li{position:relative;padding-left:24px;color:#3E485F}
.feature-copy li:before{content:"";position:absolute;left:0;top:.65em;width:9px;height:9px;border-radius:50%;background:var(--blue)}
.feature-image{background:linear-gradient(180deg,#F4F7FF,#fff);border:1px solid var(--line);border-radius:30px;padding:18px;min-height:260px;display:flex;align-items:center;justify-content:center}
.feature-image img{max-height:360px;border-radius:24px;object-fit:contain}
.high-speed-section{background:linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 100%)}
.speed-panel{display:grid;gap:18px;margin-top:18px}
.speed-card{padding:18px;border-radius:20px;background:#F8FAFF;border:1px solid var(--line)}
.privacy-protection-section .privacy-panel{display:grid;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:36px;padding:24px;box-shadow:var(--shadow)}
.privacy-cards{display:grid;gap:14px;margin-top:18px}
.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:18px}
.device-card{padding:18px;border-radius:22px;background:#fff;border:1px solid var(--line)}
.process-steps{display:grid;gap:16px;counter-reset:step}
.step-card{position:relative;padding-top:52px}
.step-num{position:absolute;left:20px;top:18px;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:900;font-size:13px}
.risk-grid{display:grid;gap:16px}
.risk-card{border-left:4px solid var(--blue)}
.risk-card strong{display:block;margin-top:10px;color:#2C3A56}
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{padding:68px 0;background:var(--gradient);color:#fff;text-align:center}
.cta-box{width:min(820px,calc(100% - 36px));margin:0 auto}.cta-box h2{font-size:30px;margin:0 0 12px}.cta-box p{margin:0 auto 24px;color:rgba(255,255,255,.88);max-width:620px}
.page-hero{padding:54px 0 28px;background:linear-gradient(180deg,#F4F7FF 0%,#fff 100%)}
.page-hero-inner{width:min(1000px,calc(100% - 36px));margin:0 auto;text-align:center}
.content-layout{width:min(1120px,calc(100% - 36px));margin:0 auto;padding:42px 0 72px;display:grid;gap:24px}
.article-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.article-panel h2{margin:0 0 12px;font-size:24px}.article-panel p{color:var(--muted);margin:0 0 16px}.article-panel p:last-child{margin-bottom:0}
.side-panel{background:#F8FAFF;border:1px solid var(--line);border-radius:28px;padding:22px;height:max-content}
.side-panel h3{margin:0 0 12px}.side-panel ul,.check-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}.side-panel li,.check-list li{position:relative;padding-left:22px;color:#465168}.side-panel li:before,.check-list li:before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--blue)}
.page-download-zone{margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}
.download-page-card{text-align:center;background:#fff;border:1px solid var(--line);border-radius:34px;padding:30px;box-shadow:var(--shadow)}
.install-steps{display:grid;gap:14px;margin-top:24px;text-align:left}.install-step{padding:18px;border-radius:20px;background:#F8FAFF;border:1px solid var(--line)}
.site-footer{background:#111A2E;color:#C9D2E4;padding:48px 0 0}.footer-grid{display:grid;gap:28px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px}.footer-brand img{width:34px;height:34px;border-radius:10px}.site-footer p{color:#AEB9CC;margin:14px 0 0}.site-footer h3{color:#fff;margin:0 0 12px}.site-footer a{display:block;color:#C9D2E4;margin:8px 0}.site-footer a:hover{color:#fff}.footer-bottom{margin-top:36px;padding:18px;text-align:center;border-top:1px solid rgba(255,255,255,.08);color:#AEB9CC;font-size:14px}
@media (min-width:700px){
  .highlight-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-cards,.policy-grid,.protocol-grid,.device-grid,.risk-grid{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr)}
  .install-steps{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:980px){
  .nav-toggle-label{display:none}.main-nav{position:static;display:flex!important;flex-direction:row;align-items:center;gap:2px;padding:0;background:transparent;border:0;box-shadow:none}.main-nav a{font-size:14px;padding:9px 10px}
  .hero-inner{grid-template-columns:1.02fr .98fr}.hero-copy h1{font-size:58px}.hero-copy p{font-size:18px}.hero-visual{min-height:470px}
  .highlight-grid{grid-template-columns:repeat(4,1fr)}
  .feature-split{grid-template-columns:1fr 1fr;padding:34px}.feature-split.reverse .feature-image{order:initial}.feature-copy h2{font-size:36px}
  .speed-panel{grid-template-columns:repeat(3,1fr)}
  .privacy-protection-section .privacy-panel{grid-template-columns:1.2fr .8fr;padding:34px}.privacy-cards,.policy-grid,.protocol-grid{grid-template-columns:repeat(3,1fr)}
  .device-grid{grid-template-columns:repeat(3,1fr)}
  .process-steps{grid-template-columns:repeat(3,1fr)}
  .risk-grid{grid-template-columns:repeat(4,1fr)}
  .content-layout{grid-template-columns:minmax(0,1fr) 320px}.article-panel{padding:34px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}
}
@media (min-width:1180px){.main-nav a{padding:9px 12px}}