:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --light:#f6f8fc;
    --line:#e6eaf2;
    --card:#ffffff;
    --soft:#eef4ff;
    --radius:24px;
    --shadow:0 18px 50px rgba(30, 65, 145, .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;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:20;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{width:min(1180px, calc(100% - 28px));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;letter-spacing:.02em;color:#111827}
.brand img{width:42px;height:42px;border-radius:12px;object-fit:cover;box-shadow:0 8px 20px rgba(41,128,254,.18)}
.nav-toggle{display:none}
.nav-toggle-label{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:999px;padding:8px 14px;color:#344054;background:#fff;font-size:14px}
.site-nav{position:absolute;left:16px;right:16px;top:72px;display:none;flex-direction:column;gap:6px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.site-nav a{padding:10px 12px;border-radius:12px;color:#475467;font-weight:600;font-size:14px}
.site-nav a.active,.site-nav a:hover{color:var(--blue);background:#eef5ff}
.nav-toggle:checked ~ .site-nav{display:flex}
.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;letter-spacing:.02em;box-shadow:0 14px 28px rgba(41,128,254,.28);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.section{padding:56px 0}
.section-soft{background:var(--light)}
.section-title{font-size:28px;line-height:1.25;margin:0 0 12px;letter-spacing:-.03em;color:#111827}
.section-desc{margin:0;color:var(--muted);max-width:760px}
.text-link{display:inline-flex;margin-top:14px;color:var(--blue);font-weight:800}
.badge{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(41,128,254,.18);background:#eef5ff;color:var(--blue);border-radius:999px;padding:6px 12px;font-weight:800;font-size:13px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.tag{display:inline-flex;border-radius:999px;padding:7px 12px;background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.26);font-weight:700;font-size:13px}
.pill{display:inline-flex;border-radius:999px;padding:6px 10px;background:#eef5ff;color:var(--blue);font-weight:800;font-size:12px}
.vpn-dashboard-hero{background:var(--gradient);color:#fff;padding:52px 0 40px;position:relative;overflow:hidden}
.vpn-dashboard-hero:before,.cta-section:before{content:"";position:absolute;inset:auto -140px -220px auto;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.18);filter:blur(8px)}
.hero-grid{display:grid;gap:30px;align-items:center;position:relative;z-index:1}
.hero-copy h1{font-size:38px;line-height:1.16;margin:14px 0 16px;letter-spacing:-.04em;max-width:680px}
.hero-copy p{font-size:16px;color:rgba(255,255,255,.86);margin:0;max-width:660px}
.hero-copy .download-btn{margin-top:24px;background:var(--blue)}
.hero-lab-panel{position:relative;border-radius:30px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:18px;box-shadow:0 30px 80px rgba(19,30,86,.20);backdrop-filter:blur(8px)}
.hero-lab-panel img{border-radius:24px;background:#fff;margin:auto;max-height:380px;object-fit:contain}
.status-card{position:relative;margin-top:12px;background:rgba(255,255,255,.94);color:#1f2937;border-radius:18px;padding:12px 14px;box-shadow:0 14px 36px rgba(16,24,40,.14);display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:13px;font-weight:800}
.status-card span{color:var(--blue)}
.status-stack{display:grid;grid-template-columns:1fr;gap:10px;margin-top:12px}
.service-index{margin-top:-28px;position:relative;z-index:3}
.service-index .container{background:#fff;border:1px solid var(--line);border-radius:28px;padding:16px;box-shadow:var(--shadow)}
.service-grid{display:grid;gap:12px}
.service-card{padding:18px;border:1px solid var(--line);border-radius:22px;background:#fff;transition:.2s ease;min-height:150px}
.service-card:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(41,128,254,.10);border-color:#cfe0ff}
.service-card h3{margin:12px 0 8px;font-size:18px;color:#111827}
.service-card p{margin:0;color:var(--muted);font-size:14px}
.feature-panel{display:grid;gap:24px;align-items:center;border:1px solid var(--line);border-radius:30px;padding:24px;background:#fff;box-shadow:var(--shadow)}
.feature-panel.reverse{background:#f9fbff}
.feature-image{border-radius:26px;background:linear-gradient(180deg,#eef5ff,#fff);padding:18px;min-height:260px;display:flex;align-items:center;justify-content:center;border:1px solid #edf1f7}
.feature-image img{max-height:320px;object-fit:contain}
.feature-copy h2{margin:12px 0;font-size:28px;line-height:1.25;color:#111827;letter-spacing:-.03em}
.feature-copy p{color:var(--muted);margin:0 0 14px}
.check-list{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:28px;color:#344054}
.check-list li:before{content:"";position:absolute;left:0;top:.62em;width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px #e7f0ff}
.privacy-protection-section .feature-panel,.encryption-protocol-section .feature-panel{background:linear-gradient(180deg,#ffffff,#f7faff)}
.policy-grid,.category-grid,.risk-grid,.faq-grid,.cards-grid{display:grid;gap:16px}
.info-card,.risk-card,.faq-item,.policy-card{border:1px solid var(--line);border-radius:22px;background:#fff;padding:20px;box-shadow:0 10px 26px rgba(16,24,40,.04)}
.info-card h3,.risk-card h3,.policy-card h3{margin:0 0 8px;font-size:18px;color:#111827}
.info-card p,.risk-card p,.policy-card p,.faq-item p{margin:0;color:var(--muted)}
.risk-card{border-left:4px solid var(--blue)}
.risk-card strong{display:block;margin-top:10px;color:#344054}
.process-steps{display:grid;gap:14px;margin-top:24px}
.step-card{border:1px solid var(--line);border-radius:22px;background:#fff;padding:18px;position:relative;overflow:hidden}
.step-card:before{content:attr(data-step);position:absolute;right:16px;top:8px;font-size:40px;line-height:1;font-weight:900;color:#e9f1ff}
.step-card h3{margin:0 0 8px;font-size:18px;color:#111827;position:relative}
.step-card p{margin:0;color:var(--muted);position:relative}
.faq-item h3{margin:0 0 8px;font-size:18px;color:#111827}
.cta-section{position:relative;overflow:hidden;background:var(--gradient);color:#fff;text-align:center;border-radius:32px;padding:40px 22px;margin:30px auto 64px;width:min(1120px, calc(100% - 32px));box-shadow:0 24px 70px rgba(64,76,204,.24)}
.cta-section h2{margin:0 0 10px;font-size:28px;letter-spacing:-.03em}
.cta-section p{max-width:680px;margin:0 auto 22px;color:rgba(255,255,255,.86)}
.page-hero{background:linear-gradient(180deg,#f3f7ff,#fff);padding:48px 0 26px;border-bottom:1px solid var(--line)}
.page-hero-inner{display:grid;gap:20px;align-items:center}
.page-hero h1{font-size:34px;line-height:1.2;margin:12px 0;color:#111827;letter-spacing:-.04em}
.page-hero p{margin:0;color:var(--muted);max-width:780px}
.page-content{padding:42px 0 64px}
.content-layout{display:grid;gap:22px;align-items:start}
.article-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:var(--shadow)}
.article-card h2{font-size:24px;margin:0 0 10px;color:#111827;letter-spacing:-.02em}
.article-card p{color:var(--muted);margin:0 0 14px}
.side-panel{background:#f7faff;border:1px solid var(--line);border-radius:24px;padding:20px;position:sticky;top:96px}
.side-panel h3{margin:0 0 10px;color:#111827}
.side-panel a{display:block;color:var(--blue);font-weight:800;margin-top:10px}
.order-list{counter-reset:item;display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
.order-list li{counter-increment:item;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 14px 14px 52px;position:relative;color:#344054}
.order-list li:before{content:counter(item);position:absolute;left:14px;top:14px;width:26px;height:26px;border-radius:50%;background:#eef5ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900}
.download-page .page-hero{text-align:center}
.download-steps{max-width:780px;margin:0 auto}
.site-footer{background:#111827;color:#d0d5dd;padding:44px 0 24px}
.footer-grid{display:grid;gap:24px}
.footer-brand{font-size:24px;font-weight:900;color:#fff;margin-bottom:10px}
.site-footer h3{font-size:15px;color:#fff;margin:0 0 10px}
.site-footer p{margin:0;color:#98a2b3}
.site-footer a{display:block;color:#d0d5dd;margin:7px 0;font-size:14px}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10);margin-top:30px;padding-top:18px;color:#98a2b3;font-size:13px}
@media (min-width:640px){
    .service-grid{grid-template-columns:repeat(2,1fr)}
    .policy-grid,.risk-grid,.faq-grid,.cards-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
    .status-stack{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
    .nav-toggle-label{display:none}
    .site-nav{position:static;display:flex!important;flex-direction:row;align-items:center;gap:2px;padding:0;background:transparent;border:0;border-radius:0;box-shadow:none}
    .site-nav a{padding:9px 11px}
    .vpn-dashboard-hero{padding:78px 0 70px}
    .hero-grid{grid-template-columns:1.05fr .95fr;gap:46px}
    .hero-copy h1{font-size:56px}
    .hero-copy p{font-size:18px}
    .service-index .container{padding:20px}
    .service-grid{grid-template-columns:repeat(4,1fr)}
    .service-card:nth-child(1),.service-card:nth-child(2){grid-column:span 2}
    .feature-panel{grid-template-columns:1fr 1fr;padding:36px}
    .feature-panel.reverse .feature-image{order:2}
    .feature-copy h2{font-size:36px}
    .section{padding:76px 0}
    .section-title{font-size:38px}
    .policy-grid{grid-template-columns:repeat(3,1fr)}
    .risk-grid{grid-template-columns:repeat(4,1fr)}
    .faq-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(3,1fr)}
    .page-hero{padding:70px 0 36px}
    .page-hero-inner{grid-template-columns:1fr auto}
    .page-hero h1{font-size:48px}
    .content-layout{grid-template-columns:minmax(0,1fr) 300px}
    .footer-grid{grid-template-columns:1.4fr .8fr .8fr .8fr}
}
@media (max-width:420px){
    .container{width:min(100% - 24px,1120px)}
    .hero-copy h1{font-size:32px}
    .section-title,.feature-copy h2,.cta-section h2{font-size:25px}
    .download-btn{width:100%;padding:0 18px}
    .service-index .container{width:calc(100% - 24px);padding:12px}
    .cta-section{width:calc(100% - 24px);border-radius:24px}
}