:root{
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --purple:#7B4EF1;
    --pink:#B84DDA;
    --text:#1f2937;
    --muted:#667085;
    --light:#f5f7fb;
    --line:#e5eaf3;
    --card:#ffffff;
    --deep:#14213d;
    --radius:24px;
    --shadow:0 18px 50px rgba(36,64,112,.12);
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
}
*{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:1.7;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}
.container.narrow{width:min(840px,calc(100% - 32px))}
.gradient-bg{background:var(--gradient);color:#fff}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(229,234,243,.85)}
.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-weight:800;color:#172033;letter-spacing:.02em}
.logo-img{width:44px;height:44px;border-radius:14px;object-fit:cover;border:1px solid #edf1f7}
.brand-text{font-size:22px}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-toggle-label{width:44px;height:44px;border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#fff}
.nav-toggle-label span{width:20px;height:2px;background:#1f2937;border-radius:99px;transition:.2s}
.site-nav{position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:12px;display:none;flex-direction:column;gap:4px}
.site-nav a{padding:12px 14px;border-radius:14px;color:#475467;font-weight:600;font-size:15px}
.site-nav a.active,.site-nav a:hover{color:var(--blue);background:#f0f6ff}
.nav-toggle:checked~.site-nav{display:flex}
.nav-toggle:checked+.nav-toggle-label span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle:checked+.nav-toggle-label span:nth-child(2){opacity:0}
.nav-toggle:checked+.nav-toggle-label span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:999px;background:#2980FE;color:#fff!important;font-weight:800;box-shadow:0 12px 24px rgba(41,128,254,.24);transition:transform .18s ease,background .18s ease,box-shadow .18s ease;border:0;white-space:nowrap}
.download-btn:hover{background:#1768E8;transform:translateY(-2px);box-shadow:0 16px 28px rgba(23,104,232,.28)}
.vpn-network-hero{position:relative;overflow:hidden;padding:72px 0 64px}
.hero-pattern{position:absolute;inset:0;opacity:.35;background:radial-gradient(circle at 18% 25%,rgba(255,255,255,.32),transparent 28%),radial-gradient(circle at 80% 70%,rgba(255,255,255,.25),transparent 32%)}
.hero-pattern:after{content:"";position:absolute;inset:0;background-image:linear-gradient(120deg,rgba(255,255,255,.15) 1px,transparent 1px),linear-gradient(30deg,rgba(255,255,255,.12) 1px,transparent 1px);background-size:120px 120px}
.hero-grid{position:relative;display:grid;gap:34px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;color:rgba(255,255,255,.9)}
.eyebrow.blue{color:var(--blue)}
.hero-copy h1{font-size:clamp(34px,8vw,64px);line-height:1.08;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:20px}
.hero-tags span{border:1px solid rgba(255,255,255,.32);background:rgba(255,255,255,.14);padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
.hero-visual{position:relative;min-height:360px;display:flex;align-items:center;justify-content:center}
.hero-visual img{border-radius:32px;box-shadow:0 28px 80px rgba(0,0,0,.24);border:1px solid rgba(255,255,255,.22);width:min(100%,540px)}
.floating-card{position:absolute;background:rgba(255,255,255,.92);color:#1f2937;border:1px solid rgba(255,255,255,.7);box-shadow:0 16px 42px rgba(22,37,68,.22);padding:10px 14px;border-radius:999px;font-weight:800;font-size:13px}
.card-one{left:4%;top:13%}.card-two{right:3%;top:20%}.card-three{left:8%;bottom:18%}.card-four{right:6%;bottom:11%}
.section-lift{margin-top:-28px;position:relative;z-index:4;padding-bottom:56px}
.section-heading{margin-bottom:28px}.section-heading.centered{text-align:center}.section-heading h2,.section-copy h2,.protocol-panel h2,.cta-inner h2{font-size:clamp(26px,5vw,42px);line-height:1.18;letter-spacing:-.03em;margin:0 0 12px;color:#172033}.gradient-bg .cta-inner h2{color:#fff}.section-heading p,.section-copy p,.protocol-panel p{color:var(--muted);margin:0 0 18px}.overview-grid{display:grid;gap:16px}.node-card,.three-card-grid article,.risk-grid article,.faq-item,.info-cards article,.article-aside,.notice-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 28px rgba(30,51,86,.06)}
.node-card{padding:22px}.node-card span{display:inline-flex;color:var(--blue);background:#f0f6ff;border-radius:999px;padding:5px 10px;font-size:12px;font-weight:800}.node-card h3{margin:14px 0 8px;font-size:20px}.node-card p{color:var(--muted);margin:0 0 12px}.node-card a,.text-link,.three-card-grid a,.risk-grid a,.process-steps a{color:var(--blue);font-weight:800}.content-band{background:#f8faff;padding:70px 0}.soft-bg{background:linear-gradient(180deg,#f7faff 0%,#fff 100%);padding:70px 0}.split-grid{display:grid;gap:26px;align-items:center}.split-grid.reverse .visual-card{order:2}.visual-card{background:#fff;border:1px solid var(--line);border-radius:32px;padding:12px;box-shadow:var(--shadow);overflow:hidden}.visual-card img,.privacy-panel img{border-radius:24px}.section-copy{padding:8px 0}.feature-list{padding:0;margin:18px 0;list-style:none}.feature-list li{position:relative;padding-left:28px;margin:10px 0;color:#4b5563}.feature-list li:before{content:"";position:absolute;left:0;top:.65em;width:10px;height:10px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #eaf2ff}.map-section{padding:70px 0;background:radial-gradient(circle at 15% 15%,#eef5ff 0,transparent 30%),radial-gradient(circle at 85% 70%,#f7edff 0,transparent 28%),#fff}.light-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:26px;box-shadow:var(--shadow)}.mini-grid,.device-pills,.privacy-tags,.protocol-list{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.mini-grid span,.device-pills span,.privacy-tags span,.protocol-list span{background:#f0f6ff;color:#2768cf;border:1px solid #d9e8ff;padding:8px 12px;border-radius:999px;font-weight:800;font-size:13px}.speed-lines{display:grid;gap:10px;margin:18px 0}.speed-lines div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;display:flex;justify-content:space-between;gap:10px;align-items:center}.speed-lines span{color:var(--muted);font-size:14px}.privacy-protection-section,.multi-device-section,.process-section,.faq-summary{padding:70px 0}.privacy-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:14px;box-shadow:var(--shadow)}.three-card-grid{display:grid;gap:16px}.three-card-grid article{padding:24px}.three-card-grid h3,.risk-grid h3,.info-cards h3{margin:0 0 8px}.three-card-grid p,.risk-grid p,.risk-grid span,.info-cards p{color:var(--muted)}.protocol-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:28px;box-shadow:var(--shadow)}.process-steps{display:grid;gap:16px}.process-steps article{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 10px 28px rgba(30,51,86,.06)}.process-steps span{display:inline-flex;width:44px;height:44px;align-items:center;justify-content:center;background:#f0f6ff;color:var(--blue);border-radius:14px;font-weight:900}.process-steps h3{margin:14px 0 6px}.process-steps p{color:var(--muted);margin:0 0 8px}.risk-grid{display:grid;gap:16px}.risk-grid article{padding:22px;border-left:4px solid var(--blue)}.risk-grid strong{display:inline-block;margin-right:4px}.faq-list{display:grid;gap:14px}.faq-item{padding:22px}.faq-item h3{margin:0 0 8px}.faq-item p{margin:0;color:var(--muted)}.centered-action{text-align:center;margin-top:24px}.cta-section{padding:72px 0;text-align:center}.cta-inner p{color:rgba(255,255,255,.86);max-width:680px;margin:0 auto 24px}.page-hero{padding:62px 0;background:linear-gradient(180deg,#f0f6ff,#fff)}.simple-hero{text-align:center}.simple-hero h1{font-size:clamp(34px,7vw,54px);line-height:1.1;margin:12px 0 14px;letter-spacing:-.04em}.simple-hero p{color:var(--muted);margin:0 auto 24px;max-width:760px}.category-badge{display:inline-flex;align-items:center;justify-content:center;padding:7px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-weight:900;font-size:13px}.article-section{padding:60px 0}.article-layout{display:grid;gap:24px;align-items:start}.article-main{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:0 12px 36px rgba(30,51,86,.06)}.article-main h2{font-size:26px;margin:0 0 14px;color:#172033}.article-main h2:not(:first-child){margin-top:34px}.article-main p{color:#4b5563;margin:0 0 16px}.article-aside{padding:20px;display:grid;gap:10px}.article-aside h3{margin:0 0 8px}.article-aside a{display:block;padding:11px 12px;border-radius:14px;background:#f8faff;color:#47617f;font-weight:700}.article-aside a:hover{background:#f0f6ff;color:var(--blue)}.info-cards{display:grid;gap:14px}.info-cards article{padding:18px;box-shadow:none}.notice-box{padding:20px;margin-top:22px;background:#f8faff}.notice-box strong{color:#172033}.ordered-steps{padding:0;margin:0;list-style:none;display:grid;gap:12px}.ordered-steps li{display:grid;gap:4px;border:1px solid var(--line);border-radius:18px;padding:16px;background:#fff}.ordered-steps span{color:var(--muted)}.checklist{display:grid;gap:10px}.checklist p{margin:0;padding:14px 16px;border-radius:16px;background:#f8faff;border:1px solid var(--line)}.full-faq{margin-top:0}.site-footer{background:#172033;color:#cbd5e1;padding:54px 0 0}.footer-grid{display:grid;gap:26px}.footer-brand{font-size:24px;font-weight:900;color:#fff;margin-bottom:10px}.site-footer p{margin:0;color:#aebbd0}.site-footer h3{color:#fff;margin:0 0 12px;font-size:17px}.site-footer a{display:block;color:#cbd5e1;margin:8px 0}.site-footer a:hover{color:#fff}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding:18px;color:#94a3b8;font-size:14px}
@media (min-width:680px){.overview-grid{grid-template-columns:repeat(2,1fr)}.three-card-grid,.risk-grid,.info-cards{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.article-main{padding:34px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
@media (min-width:980px){.nav-toggle-label{display:none}.site-nav{position:static;display:flex!important;flex-direction:row;background:transparent;border:0;box-shadow:none;padding:0;gap:2px;align-items:center}.site-nav a{font-size:14px;padding:10px 12px}.vpn-network-hero{padding:96px 0 110px}.hero-grid,.split-grid{grid-template-columns:1.02fr .98fr;gap:58px}.split-grid.reverse .section-copy{order:1}.split-grid.reverse .visual-card,.split-grid.reverse .privacy-panel,.split-grid.reverse .protocol-panel{order:2}.overview-grid{grid-template-columns:repeat(4,1fr)}.section-lift{margin-top:-56px}.three-card-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.article-layout{grid-template-columns:minmax(0,1fr) 300px}.article-aside{position:sticky;top:96px}.hero-copy p{font-size:18px}.content-band,.soft-bg,.map-section,.privacy-protection-section,.multi-device-section,.process-section,.faq-summary{padding:90px 0}.page-hero{padding:82px 0}.info-cards{grid-template-columns:repeat(3,1fr)}}
@media (max-width:480px){.download-btn{width:100%;min-height:52px}.hero-tags span,.mini-grid span,.device-pills span,.privacy-tags span,.protocol-list span{font-size:12px}.floating-card{font-size:12px;padding:8px 10px}.hero-visual{min-height:290px}.article-main{border-radius:24px;padding:20px}.speed-lines div{align-items:flex-start;flex-direction:column}.simple-hero{text-align:left}.simple-hero p{margin-left:0}.simple-hero .download-btn{width:100%}}