:root{
  --brand-blue:#2980FE;
  --brand-blue-dark:#1768E8;
  --brand-gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --text:#1f2937;
  --muted:#64748b;
  --line:#e5e7eb;
  --soft:#f7f9fc;
  --soft-blue:#eef5ff;
  --white:#ffffff;
  --shadow:0 18px 48px rgba(30,64,175,.10);
  --radius:28px;
}
*{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}
p{margin:0 0 14px;color:var(--muted)}
h1,h2,h3{margin:0;color:#0f172a;line-height:1.25;letter-spacing:-.02em}
h1{font-size:clamp(34px,7vw,64px)}
h2{font-size:clamp(26px,4vw,42px)}
h3{font-size:22px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(226,232,240,.85)}
.header-inner{width:min(1180px,calc(100% - 32px));margin:auto;display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:18px}
.logo-wrap{display:flex;align-items:center;gap:10px;font-weight:800;color:#0f172a;white-space:nowrap}
.logo-img{width:42px;height:42px;border-radius:14px;object-fit:cover;box-shadow:0 8px 22px rgba(41,128,254,.18)}
.logo-text{font-size:18px}
.nav-toggle{display:inline-flex;flex-direction:column;gap:5px;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:14px}
.nav-toggle span{width:20px;height:2px;background:#111827;border-radius:99px}
.main-nav{position:absolute;left:16px;right:16px;top:76px;display:none;flex-direction:column;gap:6px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.main-nav.nav-open{display:flex}
.main-nav a{padding:10px 12px;border-radius:14px;color:#475569;font-weight:650;font-size:15px}
.main-nav a:hover,.main-nav a.active{color:var(--brand-blue);background:var(--soft-blue)}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.section{padding:58px 0}
.section-head{max-width:760px;margin-bottom:28px}
.section-eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;padding:6px 12px;border-radius:999px;background:var(--soft-blue);color:var(--brand-blue);font-size:13px;font-weight:800}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;border-radius:999px;background:#2980FE;color:#fff;font-weight:800;box-shadow:0 14px 28px rgba(41,128,254,.25);transition:.2s ease;white-space:nowrap}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.text-link{display:inline-flex;align-items:center;gap:6px;margin-top:8px;color:var(--brand-blue);font-weight:800}
.text-link::after{content:"→"}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.pill{display:inline-flex;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:13px;font-weight:700}
.network-manager-hero{padding:26px 0 38px;background:radial-gradient(circle at 10% 10%,rgba(41,128,254,.12),transparent 32%),#fff}
.hero-shell{position:relative;overflow:hidden;border-radius:36px;background:var(--brand-gradient);padding:34px 22px;box-shadow:0 24px 70px rgba(53,88,242,.22)}
.hero-grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;position:relative;z-index:2}
.hero-content h1,.hero-content p{color:#fff}
.hero-content p{font-size:17px;color:rgba(255,255,255,.86);max-width:640px;margin-top:16px}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:24px}
.hero-note{color:rgba(255,255,255,.78);font-size:13px}
.hero-visual{position:relative;min-height:310px;display:flex;align-items:center;justify-content:center}
.hero-visual::before{content:"";position:absolute;inset:18px;border-radius:34px;background:rgba(255,255,255,.13);filter:blur(.2px);border:1px solid rgba(255,255,255,.24)}
.hero-visual img{position:relative;z-index:2;width:min(420px,92%);filter:drop-shadow(0 24px 40px rgba(15,23,42,.24))}
.float-card{position:absolute;z-index:3;background:rgba(255,255,255,.92);border:1px solid rgba(255,255,255,.8);box-shadow:0 16px 34px rgba(15,23,42,.14);padding:10px 12px;border-radius:18px;font-size:13px;font-weight:800;color:#1e293b}
.float-card.one{left:4%;top:20%}.float-card.two{right:3%;top:28%}.float-card.three{left:9%;bottom:20%}.float-card.four{right:8%;bottom:12%}
.daily-scenes{display:grid;grid-template-columns:1fr;gap:16px}
.scene-card,.bento-card,.info-card,.risk-card,.faq-item,.step-card,.tip-box{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 12px 32px rgba(15,23,42,.05)}
.scene-card .tag,.bento-card .tag{display:inline-flex;color:var(--brand-blue);font-size:13px;font-weight:850;margin-bottom:8px}
.bento-feature-center{display:grid;grid-template-columns:1fr;gap:16px}
.bento-card{min-height:180px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(180deg,#fff,#f8fbff)}
.bento-card.large{background:linear-gradient(135deg,#fff 0%,#eef5ff 100%)}
.feature-split{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;border-radius:32px;background:#fff;border:1px solid var(--line);padding:24px;box-shadow:var(--shadow)}
.feature-split.alt{background:linear-gradient(135deg,#f8fbff 0%,#fff 72%)}
.feature-img-card{border-radius:28px;padding:18px;background:linear-gradient(180deg,#eef5ff,#fff);border:1px solid #dce9ff;display:flex;align-items:center;justify-content:center}
.check-list{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:28px;color:#475569}
.check-list li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:50%;background:var(--brand-blue);box-shadow:inset 0 0 0 4px #dbeafe}
.safe-browsing-section,.smart-route-section,.public-wifi-section,.privacy-guard-section,.multi-device-section,.network-diagnosis-section,.account-security-section{background:linear-gradient(180deg,#fff 0%,#f8fafc 100%)}
.card-grid{display:grid;grid-template-columns:1fr;gap:16px}
.public-wifi-panel,.privacy-panel,.safety-panel{border-radius:32px;background:#fff;border:1px solid var(--line);padding:24px;box-shadow:var(--shadow)}
.public-wifi-combo{display:grid;grid-template-columns:1fr;gap:18px;align-items:center}.public-wifi-combo img{border-radius:28px;background:#eef5ff;padding:16px}
.privacy-row{display:grid;grid-template-columns:1fr;gap:16px;margin-top:18px}
.device-stack{display:grid;gap:14px}.device-mini{padding:18px;border-radius:22px;background:#fff;border:1px solid var(--line)}
.process-steps{display:grid;grid-template-columns:1fr;gap:14px;counter-reset:steps}
.step-card{position:relative}.step-no{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:12px;background:var(--brand-blue);color:#fff;font-weight:900;margin-bottom:10px}
.risk-grid{display:grid;grid-template-columns:1fr;gap:14px}.risk-card{border-left:4px solid var(--brand-blue)}
.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px;margin-bottom:8px}
.cta-section{padding:58px 0}.cta-box{position:relative;overflow:hidden;border-radius:34px;background:var(--brand-gradient);padding:34px 22px;text-align:center;color:#fff}.cta-box h2,.cta-box p{color:#fff}.cta-box p{max-width:680px;margin:12px auto 22px;color:rgba(255,255,255,.86)}
.page-hero{padding:42px 0;background:linear-gradient(180deg,#f7faff,#fff)}
.page-hero-card{border-radius:34px;background:#fff;border:1px solid var(--line);padding:26px;box-shadow:var(--shadow)}
.page-hero-card p{font-size:17px;max-width:820px}.page-layout{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}.article-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 14px 36px rgba(15,23,42,.05)}
.article-panel h2{font-size:26px;margin:8px 0 12px}.article-panel h3{font-size:20px;margin:22px 0 10px}.article-panel ul,.article-panel ol{padding-left:20px;color:#475569}.article-panel li{margin:7px 0}.side-panel{display:grid;gap:16px}.side-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:0 12px 32px rgba(15,23,42,.05)}
.download-page-grid{display:grid;grid-template-columns:1fr;gap:18px}.single-download-panel{text-align:center;background:linear-gradient(135deg,#eef5ff,#fff);border:1px solid #dbeafe;border-radius:32px;padding:28px}.only-download-action{margin-top:18px}.footer-inner{width:min(1180px,calc(100% - 32px));margin:auto;display:grid;grid-template-columns:1fr;gap:22px;padding:34px 0}.site-footer{background:#f8fafc;border-top:1px solid var(--line)}.footer-brand{display:flex;gap:14px;align-items:center}.footer-brand img{width:48px;height:48px;border-radius:16px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.footer-links a{color:#475569;font-weight:650}.footer-bottom{text-align:center;border-top:1px solid var(--line);padding:16px;color:#64748b;font-size:14px}
@media (min-width:720px){
  .section{padding:76px 0}.hero-shell{padding:46px}.daily-scenes{grid-template-columns:repeat(3,1fr)}.bento-feature-center{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:repeat(3,1fr)}.privacy-row{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.risk-grid{grid-template-columns:repeat(2,1fr)}.download-page-grid{grid-template-columns:1.1fr .9fr}.footer-inner{grid-template-columns:1fr 1fr}.footer-links{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:980px){
  .nav-toggle{display:none}.main-nav{position:static;display:flex;flex-direction:row;align-items:center;gap:4px;padding:0;border:0;border-radius:0;box-shadow:none;background:transparent}.main-nav a{font-size:14px;padding:8px 10px}.hero-grid{grid-template-columns:1.05fr .95fr}.hero-shell{padding:58px}.hero-visual{min-height:420px}.bento-feature-center{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(170px,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;padding:34px}.feature-split.reverse .feature-img-card{order:-1}.public-wifi-combo{grid-template-columns:1.2fr .8fr}.page-layout{grid-template-columns:minmax(0,1fr) 330px}.risk-grid{grid-template-columns:repeat(4,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:1180px){.main-nav a{padding:9px 12px}}