:root{
    --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#202638;
    --muted:#667085;
    --light:#F5F7FB;
    --line:#E6EAF2;
    --white:#fff;
    --soft:#F0F5FF;
    --radius:28px;
    --shadow:0 18px 50px rgba(23,43,99,.09);
}
*{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:1.72;
    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,.92);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(230,234,242,.85);
}
.header-inner{
    min-height:70px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
}
.logo{
    display:flex;
    align-items:center;
    gap:10px;
    font-weight:800;
    color:#16213F;
    white-space:nowrap;
}
.logo img,.footer-logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.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 10px;
    cursor:pointer;
    background:#fff;
}
.nav-toggle span{height:2px;background:#26314D;border-radius:2px}
.site-nav{
    position:absolute;
    left:16px;
    right:16px;
    top:72px;
    display:none;
    flex-direction:column;
    padding:14px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    box-shadow:var(--shadow);
}
.nav-check:checked~.site-nav{display:flex}
.site-nav a{
    padding:10px 12px;
    border-radius:12px;
    color:#4B5568;
    font-size:14px;
    font-weight:650;
}
.site-nav a:hover,.site-nav a.active{background:#EEF4FF;color:var(--blue)}
.download-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:13px 26px;
    border-radius:999px;
    background:var(--blue);
    color:#fff;
    font-weight:800;
    box-shadow:0 12px 26px rgba(41,128,254,.25);
    transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 16px 30px rgba(23,104,232,.28)}
main{background:linear-gradient(180deg,#FFFFFF 0%,#F8FAFF 38%,#FFFFFF 100%)}
.network-manager-hero{
    padding:34px 0 28px;
}
.hero-shell{
    border-radius:34px;
    padding:30px 22px;
    background:var(--brand-gradient);
    color:#fff;
    overflow:hidden;
    position:relative;
    box-shadow:0 28px 70px rgba(53,88,242,.22);
}
.hero-shell:before,.hero-shell:after{
    content:"";
    position:absolute;
    border-radius:999px;
    background:rgba(255,255,255,.18);
    filter:blur(4px);
}
.hero-shell:before{width:260px;height:260px;right:-80px;top:-90px}
.hero-shell:after{width:180px;height:180px;left:-60px;bottom:-80px}
.hero-content,.hero-visual{position:relative;z-index:1}
.eyebrow,.badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:7px 12px;
    border-radius:999px;
    font-size:13px;
    font-weight:800;
    color:var(--blue);
    background:#EEF5FF;
}
.hero-shell .eyebrow{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.24)}
h1,h2,h3{line-height:1.18;margin:0;color:#16213F}
.hero-shell h1{font-size:clamp(34px,8vw,64px);margin:18px 0;color:#fff;letter-spacing:-.04em}
.hero-shell p{font-size:17px;color:rgba(255,255,255,.86);margin:0 0 22px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin:22px 0}
.hero-tags,.floating-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span,.floating-tags span{
    display:inline-flex;
    padding:8px 12px;
    border-radius:999px;
    background:rgba(255,255,255,.16);
    color:#fff;
    border:1px solid rgba(255,255,255,.22);
    font-size:13px;
    font-weight:700;
}
.hero-visual{
    margin-top:28px;
    display:grid;
    place-items:center;
}
.device-card{
    width:min(420px,100%);
    padding:18px;
    border-radius:30px;
    background:rgba(255,255,255,.9);
    box-shadow:0 26px 60px rgba(18,31,70,.18);
}
.device-card img{border-radius:24px;margin:auto}
.status-card{
    margin-top:14px;
    width:100%;
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px;
}
.status-card div{
    padding:13px;
    border-radius:18px;
    background:#fff;
    color:#26314D;
    font-weight:800;
    font-size:13px;
}
.section{padding:56px 0}
.section.soft{background:#F6F8FC}
.section-head{margin-bottom:24px;display:flex;flex-direction:column;gap:10px}
.section-head.center{text-align:center;align-items:center}
.section-head h2{font-size:clamp(28px,5vw,42px)}
.section-head p{margin:0;color:var(--muted);max-width:720px}
.daily-scenes{
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
}
.scene-card,.bento-card,.white-panel,.risk-card,.faq-item,.step-card,.info-card,.article-card,.side-panel{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
}
.scene-card{padding:22px}
.scene-card .tag,.bento-card .tag,.info-card .tag{
    color:var(--blue);
    font-size:13px;
    font-weight:850;
    letter-spacing:.02em;
}
.scene-card h3,.bento-card h3,.info-card h3{font-size:22px;margin:8px 0 10px}
.scene-card p,.bento-card p,.info-card p,.risk-card p,.step-card p,.article-card p,.side-panel p{color:var(--muted);margin:0 0 14px}
.text-link{display:inline-flex;color:var(--blue);font-weight:850}
.text-link:hover{color:var(--blue-dark)}
.bento-feature-center{
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
}
.bento-card{padding:22px;min-height:190px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;position:relative}
.bento-card.large{background:linear-gradient(145deg,#fff 0%,#F0F5FF 100%)}
.bento-card:after{
    content:"";
    position:absolute;
    width:120px;height:120px;border-radius:999px;
    right:-52px;bottom:-52px;
    background:rgba(41,128,254,.08);
}
.feature-split,.feature-split.reverse{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
    align-items:center;
}
.white-panel{padding:24px}
.white-panel h2{font-size:clamp(28px,5vw,40px);margin-bottom:14px}
.white-panel p{color:var(--muted);margin:0 0 16px}
.feature-points{display:grid;gap:12px;margin:18px 0}
.feature-points span,.check-list li,.mini-list li{
    display:flex;
    gap:10px;
    padding:12px 14px;
    background:#F7F9FE;
    border:1px solid #EDF1F8;
    border-radius:16px;
    color:#3D475F;
}
.feature-image{
    padding:18px;
    border-radius:32px;
    background:linear-gradient(145deg,#F8FAFF 0%,#EAF1FF 100%);
    border:1px solid var(--line);
}
.feature-image img{border-radius:24px;margin:auto}
.route-panel{
    display:grid;
    gap:16px;
}
.route-card{
    padding:18px;
    border-radius:22px;
    background:#fff;
    border:1px solid var(--line);
}
.route-card strong{color:#16213F}
.public-wifi-section .wifi-grid,.privacy-grid,.multi-grid,.diagnosis-grid,.account-grid,.risk-grid,.faq-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
}
.info-card,.risk-card,.step-card{padding:20px}
.privacy-band{
    padding:24px;
    border-radius:34px;
    background:linear-gradient(135deg,#F8FAFF 0%,#EFF4FF 100%);
    border:1px solid var(--line);
}
.process-steps{
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
    counter-reset:step;
}
.step-card{position:relative}
.step-num{
    width:38px;
    height:38px;
    border-radius:14px;
    background:var(--blue);
    color:#fff;
    display:grid;
    place-items:center;
    font-weight:900;
    margin-bottom:14px;
}
.risk-card{
    border-left:5px solid var(--blue);
}
.risk-card strong{display:block;margin-bottom:8px;color:#16213F}
.faq-item{padding:20px}
.faq-item h3{font-size:19px;margin-bottom:10px}
.cta-section{padding:58px 0 70px}
.cta-shell{
    text-align:center;
    color:#fff;
    padding:36px 20px;
    border-radius:34px;
    background:var(--brand-gradient);
    box-shadow:0 28px 70px rgba(53,88,242,.18);
}
.cta-shell h2{color:#fff;font-size:clamp(28px,5vw,42px);margin-bottom:12px}
.cta-shell p{color:rgba(255,255,255,.86);max-width:700px;margin:0 auto 22px}
.page-hero{
    padding:44px 0 20px;
}
.page-hero-inner{
    border-radius:32px;
    padding:28px 22px;
    background:linear-gradient(135deg,#F8FAFF 0%,#EEF4FF 100%);
    border:1px solid var(--line);
}
.page-hero h1{font-size:clamp(32px,6vw,52px);margin:14px 0}
.page-hero p{color:var(--muted);max-width:780px;margin:0}
.content-section{padding:28px 0 62px}
.page-layout{
    display:grid;
    grid-template-columns:1fr;
    gap:18px;
    align-items:start;
}
.article-card{padding:24px}
.article-card h2{font-size:26px;margin:22px 0 12px}
.article-card h2:first-child{margin-top:0}
.article-card ul,.article-card ol{padding-left:20px;color:#4B5568}
.article-card li{margin:8px 0}
.tip-box{
    padding:18px;
    border-radius:22px;
    background:#F7FAFF;
    border:1px solid #E3ECFF;
    margin:20px 0;
}
.tip-box strong{color:#16213F}
.side-panel{padding:20px}
.side-panel h3{font-size:20px;margin-bottom:12px}
.side-panel a{display:block;padding:10px 0;border-bottom:1px solid var(--line);color:var(--blue);font-weight:750}
.side-panel a:last-child{border-bottom:none}
.download-centered{text-align:center;margin-top:22px}
.download-page-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:18px;
}
.install-steps{
    display:grid;
    gap:14px;
    margin:24px 0;
}
.install-step{
    padding:16px;
    border-radius:20px;
    background:#F7F9FE;
    border:1px solid #EDF1F8;
}
.site-footer{
    background:#111827;
    color:#C9D2E5;
    padding:46px 0 0;
}
.footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
}
.footer-logo{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:12px}
.site-footer h3{color:#fff;font-size:18px;margin-bottom:12px}
.site-footer a{display:block;color:#C9D2E5;margin:8px 0}
.site-footer a:hover{color:#fff}
.site-footer p{margin:0;color:#A9B4C8}
.footer-bottom{
    display:flex;
    flex-direction:column;
    gap:8px;
    border-top:1px solid rgba(255,255,255,.12);
    margin-top:32px;
    padding:18px 0;
    color:#A9B4C8;
    font-size:14px;
}
@media (min-width:700px){
    .daily-scenes{grid-template-columns:repeat(2,1fr)}
    .bento-feature-center{grid-template-columns:repeat(2,1fr)}
    .public-wifi-section .wifi-grid,.privacy-grid,.multi-grid,.diagnosis-grid,.account-grid,.risk-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}
    .footer-bottom{flex-direction:row;justify-content:space-between}
}
@media (min-width:920px){
    .nav-toggle{display:none}
    .site-nav{
        position:static;
        display:flex;
        flex-direction:row;
        align-items:center;
        padding:0;
        border:0;
        box-shadow:none;
        background:transparent;
        gap:2px;
    }
    .hero-shell{
        display:grid;
        grid-template-columns:1.04fr .96fr;
        align-items:center;
        gap:30px;
        padding:54px;
        border-radius:42px;
    }
    .hero-visual{margin-top:0}
    .daily-scenes{grid-template-columns:repeat(3,1fr)}
    .bento-feature-center{
        grid-template-columns:repeat(4,1fr);
        grid-auto-rows:minmax(180px,auto);
    }
    .bento-card.large{grid-column:span 2;grid-row:span 2}
    .bento-card.wide{grid-column:span 2}
    .feature-split{grid-template-columns:1fr 1fr}
    .feature-split.reverse .feature-image{order:-1}
    .route-panel{grid-template-columns:1.1fr .9fr}
    .public-wifi-section .wifi-grid{grid-template-columns:1fr 1fr 1fr}
    .privacy-grid,.multi-grid,.diagnosis-grid,.account-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-layout{grid-template-columns:minmax(0,1fr) 320px}
    .page-hero-inner{padding:44px}
    .article-card{padding:34px}
    .download-page-grid{grid-template-columns:1.1fr .9fr}
}
@media (max-width:420px){
    .container{width:min(100% - 24px,1120px)}
    .hero-shell{padding:26px 18px;border-radius:28px}
    .download-btn{width:100%}
    .status-card{grid-template-columns:1fr}
    .section{padding:44px 0}
    .white-panel,.article-card{padding:20px}
}