:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#6b7280;
    --light:#f5f7fb;
    --line:#e5e7eb;
    --soft:#eef4ff;
    --white:#ffffff;
    --radius:28px;
    --shadow:0 18px 48px rgba(24, 42, 92, .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:1.7;
    overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
p{margin:0 0 14px}
h1,h2,h3{margin:0;color:#111827;line-height:1.22}
h1{font-size:clamp(34px,8vw,64px);letter-spacing:-1.2px}
h2{font-size:clamp(26px,5vw,42px);letter-spacing:-.6px}
h3{font-size:20px}
.site-header{
    position:sticky;
    top:0;
    z-index:20;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(229,231,235,.86);
}
.header-inner{
    width:min(1180px,calc(100% - 32px));
    margin:0 auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:72px;
    gap:18px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#111827}
.brand-logo{width:42px;height:42px;border-radius:14px;object-fit:cover;box-shadow:0 8px 22px rgba(41,128,254,.2)}
.brand-text{font-size:20px}
.nav-check{display:none}
.nav-toggle{width:44px;height:44px;border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:0 11px;background:#fff}
.nav-toggle span{height:2px;background:#111827;border-radius:2px}
.main-nav{
    position:absolute;
    top:72px;
    left:16px;
    right:16px;
    display:none;
    flex-direction:column;
    gap:4px;
    padding:14px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:22px;
    box-shadow:var(--shadow);
}
.nav-check:checked ~ .main-nav{display:flex}
.main-nav a{
    padding:10px 12px;
    border-radius:14px;
    color:#4b5563;
    font-size:15px;
    font-weight:600;
}
.main-nav a:hover,.main-nav a.active{background:var(--soft);color:var(--blue)}
.site-main{min-height:60vh}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.section{padding:70px 0}
.section-soft{background:linear-gradient(180deg,#f8fbff 0%,#ffffff 100%)}
.section-title{max-width:760px;margin-bottom:28px}
.section-title .eyebrow,.eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--blue);
    background:#eef5ff;
    border:1px solid #d8e7ff;
    padding:6px 12px;
    border-radius:999px;
    font-weight:800;
    font-size:13px;
    margin-bottom:14px;
}
.lead{font-size:18px;color:#4b5563;max-width:760px}
.download-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:13px 24px;
    border-radius:999px;
    background:#2980FE;
    color:#fff;
    font-weight:800;
    box-shadow:0 12px 24px rgba(41,128,254,.28);
    transition:.2s ease;
}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.text-link{color:var(--blue);font-weight:800}
.text-link:hover{color:var(--blue-dark)}
.vpn-saas-hero{
    position:relative;
    color:#fff;
    background:var(--gradient);
    overflow:hidden;
    border-bottom-left-radius:34px;
    border-bottom-right-radius:34px;
}
.vpn-saas-hero:before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(135deg,rgba(255,255,255,.16),rgba(255,255,255,0) 45%);
    clip-path:polygon(0 0,100% 0,100% 74%,0 100%);
}
.hero-inner{
    position:relative;
    z-index:1;
    width:min(1180px,calc(100% - 32px));
    margin:0 auto;
    display:grid;
    gap:36px;
    padding:66px 0 58px;
}
.hero-copy h1{color:#fff;margin-bottom:18px}
.hero-copy p{font-size:18px;color:rgba(255,255,255,.88);max-width:620px}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:26px 0}
.security-tags,.floating-tags,.mini-tags{display:flex;gap:10px;flex-wrap:wrap}
.security-tags span,.floating-tags span,.mini-tags span{
    display:inline-flex;
    align-items:center;
    border-radius:999px;
    padding:8px 12px;
    background:rgba(255,255,255,.16);
    border:1px solid rgba(255,255,255,.22);
    color:#fff;
    font-weight:700;
    font-size:13px;
}
.hero-visual{position:relative;min-height:360px;display:grid;place-items:center}
.product-card{
    width:min(420px,100%);
    background:rgba(255,255,255,.18);
    border:1px solid rgba(255,255,255,.28);
    border-radius:36px;
    padding:18px;
    box-shadow:0 28px 70px rgba(18,28,76,.28);
    backdrop-filter:blur(18px);
}
.product-card img{border-radius:28px;background:#fff}
.float-card{
    position:absolute;
    background:#fff;
    color:#1f2937;
    border-radius:18px;
    padding:12px 14px;
    box-shadow:0 18px 45px rgba(17,24,39,.16);
    font-weight:800;
    font-size:14px;
}
.float-card small{display:block;color:#6b7280;font-weight:600;font-size:12px}
.float-one{left:0;top:22%}
.float-two{right:0;top:10%}
.float-three{left:10%;bottom:8%}
.float-four{right:4%;bottom:18%}
.product-highlights{
    margin-top:-38px;
    position:relative;
    z-index:3;
}
.highlight-grid{
    display:grid;
    gap:16px;
}
.highlight-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
    padding:22px;
    box-shadow:0 14px 36px rgba(31,41,55,.07);
}
.highlight-card .tag{
    display:inline-flex;
    color:var(--blue);
    background:#eef5ff;
    border-radius:999px;
    padding:5px 10px;
    font-size:12px;
    font-weight:800;
    margin-bottom:12px;
}
.highlight-card p{color:#5b6472}
.feature-section{
    display:grid;
    gap:28px;
    align-items:center;
}
.feature-panel{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:28px;
    box-shadow:var(--shadow);
}
.feature-panel h2{margin-bottom:16px}
.feature-panel p{color:#4b5563}
.feature-points{
    display:grid;
    gap:10px;
    margin:20px 0;
}
.feature-points span{
    display:flex;
    gap:10px;
    align-items:flex-start;
    color:#374151;
}
.feature-points span:before{
    content:"";
    width:8px;
    height:8px;
    margin-top:10px;
    border-radius:50%;
    background:var(--blue);
    flex:0 0 auto;
}
.image-shell{
    border-radius:34px;
    background:linear-gradient(145deg,#eef4ff,#fff);
    border:1px solid var(--line);
    padding:18px;
    box-shadow:var(--shadow);
}
.image-shell img{border-radius:26px}
.high-speed-section .feature-panel{
    background:linear-gradient(180deg,#fff,#f7fbff);
}
.speed-metrics{
    display:grid;
    gap:12px;
    margin-top:18px;
}
.metric{
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    padding:16px;
}
.metric strong{display:block;font-size:22px;color:#111827}
.metric span{color:#6b7280;font-size:14px}
.global-nodes-section .node-card{
    background:#f8fbff;
    border:1px solid #dfeaff;
    border-radius:24px;
    padding:20px;
}
.privacy-protection-section{
    background:#f7f9fc;
}
.privacy-grid{
    display:grid;
    gap:18px;
}
.privacy-card,.policy-card,.risk-card,.faq-item,.step-card,.info-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
    padding:22px;
    box-shadow:0 12px 34px rgba(17,24,39,.05);
}
.privacy-card h3,.policy-card h3,.risk-card h3,.step-card h3,.info-card h3{margin-bottom:10px}
.privacy-card p,.policy-card p,.risk-card p,.step-card p,.info-card p{color:#5b6472}
.no-log-policy-section .policy-grid,
.risk-grid,
.faq-grid,
.info-grid{
    display:grid;
    gap:16px;
}
.policy-card{border-top:4px solid var(--blue)}
.device-board{
    display:grid;
    gap:16px;
}
.device-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
    padding:18px;
}
.device-card strong{display:block;margin-bottom:6px}
.protocol-panel{
    background:#111827;
    color:#e5e7eb;
    border-radius:32px;
    padding:28px;
    overflow:hidden;
    position:relative;
}
.protocol-panel h2{color:#fff}
.protocol-panel p{color:#cbd5e1}
.protocol-lines{
    display:grid;
    gap:12px;
    margin-top:20px;
}
.protocol-line{
    display:flex;
    justify-content:space-between;
    gap:16px;
    padding:14px 0;
    border-bottom:1px solid rgba(255,255,255,.12);
}
.protocol-line span:last-child{color:#9ca3af;text-align:right}
.process-steps{
    display:grid;
    gap:16px;
}
.step-number{
    display:inline-grid;
    place-items:center;
    width:38px;
    height:38px;
    border-radius:14px;
    background:#eef5ff;
    color:var(--blue);
    font-weight:900;
    margin-bottom:12px;
}
.risk-card{
    border-left:4px solid var(--blue);
}
.risk-card .suggest{font-weight:800;color:#111827;margin-top:8px}
.faq-item h3{font-size:18px;margin-bottom:8px}
.faq-item p{color:#5b6472}
.cta-section{
    width:min(1180px,calc(100% - 32px));
    margin:0 auto 74px;
    border-radius:36px;
    background:var(--gradient);
    padding:42px 24px;
    text-align:center;
    color:#fff;
    position:relative;
    overflow:hidden;
}
.cta-section h2{color:#fff;margin-bottom:12px}
.cta-section p{max-width:720px;margin:0 auto 24px;color:rgba(255,255,255,.88)}
.page-hero{
    background:linear-gradient(180deg,#f7fbff 0%,#fff 100%);
    padding:54px 0 24px;
}
.page-hero-inner{
    width:min(980px,calc(100% - 32px));
    margin:0 auto;
}
.page-hero h1{font-size:clamp(32px,6vw,52px);margin-bottom:16px}
.page-hero p{font-size:18px;color:#4b5563}
.subpage-body{
    width:min(1080px,calc(100% - 32px));
    margin:0 auto;
    padding:34px 0 74px;
}
.subpage-layout{
    display:grid;
    gap:24px;
}
.content-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:30px;
    padding:26px;
    box-shadow:var(--shadow);
}
.content-card p{color:#4b5563}
.side-panel{
    background:#f8fbff;
    border:1px solid #dfeaff;
    border-radius:26px;
    padding:22px;
}
.side-panel h2{font-size:22px;margin-bottom:14px}
.check-list,.number-list{
    margin:16px 0 0;
    padding:0;
    list-style:none;
    display:grid;
    gap:12px;
}
.check-list li,.number-list li{
    background:#fff;
    border:1px solid var(--line);
    border-radius:18px;
    padding:14px 16px;
    color:#4b5563;
}
.notice-box{
    margin-top:20px;
    background:#f7fbff;
    border:1px solid #dfeaff;
    border-radius:22px;
    padding:18px;
    color:#42526b;
}
.page-download{
    margin-top:24px;
}
.download-page-steps{
    display:grid;
    gap:16px;
    margin-top:24px;
}
.safety-panel{
    background:#fff;
    border:1px solid var(--line);
    border-radius:30px;
    padding:26px;
    box-shadow:var(--shadow);
}
.site-footer{
    background:#101827;
    color:#cbd5e1;
    padding-top:48px;
}
.footer-inner{
    width:min(1180px,calc(100% - 32px));
    margin:0 auto;
    display:grid;
    gap:30px;
}
.footer-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:20px}
.footer-logo img{width:42px;height:42px;border-radius:14px}
.footer-brand p{max-width:460px;color:#9ca3af}
.footer-links{
    display:grid;
    gap:22px;
}
.footer-links h3{color:#fff;font-size:16px;margin-bottom:12px}
.footer-links a{display:block;color:#9ca3af;margin:8px 0}
.footer-links a:hover{color:#fff}
.footer-bottom{
    width:min(1180px,calc(100% - 32px));
    margin:38px auto 0;
    padding:18px 0;
    border-top:1px solid rgba(255,255,255,.1);
    display:flex;
    flex-direction:column;
    gap:8px;
    color:#9ca3af;
    font-size:14px;
}
@media (min-width:640px){
    .highlight-grid,.privacy-grid,.policy-grid,.risk-grid,.faq-grid,.info-grid,.download-page-steps{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
    .speed-metrics,.device-board{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:900px){
    .nav-toggle{display:none}
    .main-nav{
        position:static;
        display:flex;
        flex-direction:row;
        align-items:center;
        gap:2px;
        padding:0;
        border:0;
        box-shadow:none;
        background:transparent;
    }
    .main-nav a{font-size:14px;padding:10px 10px}
    .hero-inner{grid-template-columns:1.05fr .95fr;align-items:center;padding:92px 0 86px}
    .highlight-grid{grid-template-columns:repeat(4,1fr)}
    .feature-section{grid-template-columns:1.05fr .95fr}
    .feature-section.reverse{grid-template-columns:.95fr 1.05fr}
    .feature-section.reverse .image-shell{order:-1}
    .privacy-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)}
    .process-steps{grid-template-columns:repeat(3,1fr)}
    .subpage-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start}
    .footer-inner{grid-template-columns:1fr 1.4fr}
    .footer-links{grid-template-columns:repeat(3,1fr)}
    .footer-bottom{flex-direction:row;justify-content:space-between}
}
@media (min-width:1120px){
    .main-nav a{padding:10px 13px}
    .section{padding:88px 0}
}
@media (max-width:520px){
    .float-card{position:static;margin-top:10px;width:100%}
    .hero-visual{display:block;min-height:0}
    .product-card{margin-bottom:12px}
    .hero-actions{align-items:stretch}
    .download-btn{width:100%}
    .protocol-line{flex-direction:column}
    .protocol-line span:last-child{text-align:left}
    .content-card,.feature-panel,.safety-panel{padding:22px}
}