:root{
  --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#202638;
  --muted:#667085;
  --soft:#F5F7FB;
  --soft-blue:#EEF4FF;
  --border:#E6EAF2;
  --white:#FFFFFF;
  --shadow:0 18px 50px rgba(32,38,56,.08);
  --radius:28px;
}
*{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:1.75;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;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(18px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#1E2A44;letter-spacing:.02em}
.logo img,.footer-logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.nav-toggle{display:none}
.nav-toggle-label{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:999px;padding:8px 14px;color:#344054;background:#fff}
.site-nav{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--border);border-radius:22px;padding:14px;box-shadow:var(--shadow)}
.nav-toggle:checked ~ .site-nav{display:grid;gap:6px}
.nav-link{padding:10px 12px;border-radius:14px;color:#475467;font-size:15px}
.nav-link:hover,.nav-link.active{background:var(--soft-blue);color:#155EEF}
.section{padding:72px 0}
.section-soft{background:linear-gradient(180deg,#F8FAFF 0%,#FFFFFF 100%)}
.section-head{margin-bottom:26px;max-width:760px}
.section-eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;color:#155EEF;background:#EAF2FF;border:1px solid #D9E8FF;border-radius:999px;padding:6px 12px;font-size:13px;font-weight:700}
h1,h2,h3{line-height:1.2;margin:0;color:#172033}
h1{font-size:clamp(34px,7vw,64px);letter-spacing:-.04em}
h2{font-size:clamp(26px,4.6vw,42px);letter-spacing:-.03em;margin-top:10px}
h3{font-size:20px;margin-bottom:8px}
p{margin:10px 0;color:var(--muted)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 24px;border-radius:999px;background:#2980FE;color:#fff!important;font-weight:800;box-shadow:0 12px 24px rgba(41,128,254,.22);transition:transform .2s ease,background .2s ease,box-shadow .2s ease}
.download-btn:hover{background:#1768E8;transform:translateY(-2px);box-shadow:0 16px 28px rgba(23,104,232,.26)}
.network-manager-hero{padding:30px 0 54px;background:linear-gradient(180deg,#F6F8FF 0%,#fff 100%)}
.hero-shell{background:var(--brand-gradient);border-radius:36px;padding:26px;color:#fff;overflow:hidden;position:relative;box-shadow:0 24px 70px rgba(66,91,234,.22)}
.hero-shell:before{content:"";position:absolute;inset:auto -80px -130px auto;width:280px;height:280px;background:rgba(255,255,255,.18);border-radius:50%;filter:blur(8px)}
.hero-grid{display:grid;gap:28px;position:relative;z-index:2}
.hero-content p,.hero-content h1{color:#fff}.hero-content p{font-size:18px;max-width:620px;opacity:.92}
.hero-tags,.floating-tags,.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.hero-tags span,.floating-tags span,.tag-row span{background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:999px;padding:7px 12px;font-size:13px;font-weight:700}
.hero-art{position:relative;min-height:300px;display:flex;align-items:center;justify-content:center}
.hero-art img{width:min(420px,90%);border-radius:32px;filter:drop-shadow(0 20px 45px rgba(22,33,74,.24))}
.status-card{position:absolute;background:rgba(255,255,255,.92);color:#25324A;border-radius:18px;padding:12px 14px;box-shadow:var(--shadow);font-size:13px;font-weight:800}
.status-card small{display:block;color:#667085;font-weight:600}.card-a{left:4%;top:10%}.card-b{right:2%;bottom:8%}.card-c{right:8%;top:20%}.card-d{left:8%;bottom:12%}
.daily-scenes{display:grid;gap:16px}.scene-card,.bento-card,.info-card,.risk-card,.faq-item,.step-card,.content-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:0 12px 32px rgba(32,38,56,.05)}
.scene-card strong,.bento-card strong{display:inline-flex;color:#155EEF;background:#EAF2FF;border-radius:999px;padding:4px 10px;font-size:12px;margin-bottom:10px}
.card-link{display:inline-flex;margin-top:10px;color:#1768E8;font-weight:800}.card-link:hover{text-decoration:underline}
.bento-feature-center{display:grid;gap:16px}.bento-card.large{background:linear-gradient(145deg,#fff 0%,#F4F8FF 100%)}
.feature-split,.safe-browsing-section,.smart-route-section,.multi-device-section,.network-diagnosis-section,.account-security-section{display:grid;gap:24px;align-items:center}
.feature-panel{background:#fff;border:1px solid var(--border);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.feature-panel img{border-radius:26px;background:var(--soft)}
.check-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}.check-list li{padding:12px 14px;border-radius:16px;background:var(--soft);color:#344054;border:1px solid var(--border)}
.smart-card{background:linear-gradient(145deg,#EEF4FF 0%,#fff 70%);border:1px solid var(--border);border-radius:34px;padding:24px}
.line-list{display:grid;gap:12px;margin-top:18px}.line-item{display:flex;justify-content:space-between;gap:12px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:14px;color:#344054}.line-item span{color:#155EEF;font-weight:800}
.wifi-panel{background:#fff;border:1px solid var(--border);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.wifi-grid,.privacy-grid,.risk-grid,.page-card-grid{display:grid;gap:16px}.wifi-grid{margin-top:18px}.wifi-image img{border-radius:30px}
.privacy-guard-section{display:grid;gap:20px}.privacy-strip{background:linear-gradient(90deg,#F7FAFF,#fff);border:1px solid var(--border);border-radius:34px;padding:24px}
.device-grid{display:grid;gap:16px}.device-card{background:#fff;border:1px solid var(--border);border-radius:24px;padding:18px}.device-card img{border-radius:22px;margin-top:12px}
.process-steps{display:grid;gap:16px}.step-card b{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:14px;background:#2980FE;color:#fff;margin-bottom:10px}
.risk-card{border-left:4px solid #2980FE}.risk-card em{display:block;color:#155EEF;font-style:normal;font-weight:800;margin-top:6px}
.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px}.faq-item p{margin-bottom:0}
.cta-section{padding:72px 0}.cta-box{text-align:center;color:#fff;background:var(--brand-gradient);border-radius:36px;padding:34px 22px;box-shadow:0 24px 70px rgba(66,91,234,.22)}.cta-box h2,.cta-box p{color:#fff}.cta-box p{opacity:.9;max-width:680px;margin:12px auto 22px}
.page-hero{padding:56px 0 30px;background:linear-gradient(180deg,#F6F8FF 0%,#FFFFFF 100%)}.page-hero h1{font-size:clamp(32px,5vw,52px);margin-top:16px}.page-hero p{font-size:18px;max-width:760px}
.page-layout{display:grid;gap:24px;align-items:start}.article-panel{background:#fff;border:1px solid var(--border);border-radius:34px;padding:24px;box-shadow:var(--shadow)}.article-panel p{color:#475467}
.side-panel{background:#F7FAFF;border:1px solid var(--border);border-radius:30px;padding:22px;position:sticky;top:96px}.side-panel a{display:block;color:#1768E8;font-weight:800;margin-top:10px}
.page-download{margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}
.download-steps{counter-reset:step;display:grid;gap:14px;margin:24px 0}.download-step{background:#fff;border:1px solid var(--border);border-radius:22px;padding:18px}.download-step:before{counter-increment:step;content:counter(step);display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;background:#2980FE;color:#fff;border-radius:12px;font-weight:800;margin-bottom:8px}
.site-footer{background:#101828;color:#D0D5DD;padding:48px 0 24px}.site-footer p,.site-footer a{color:#D0D5DD}.site-footer h3{color:#fff;font-size:16px}.footer-grid{display:grid;gap:24px}.footer-grid a{display:block;margin:8px 0}.footer-logo{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;color:#98A2B3;font-size:14px}
@media (min-width:700px){
  .daily-scenes{grid-template-columns:repeat(2,1fr)}.wifi-grid,.privacy-grid,.risk-grid,.page-card-grid,.process-steps,.device-grid{grid-template-columns:repeat(2,1fr)}
  .hero-shell{padding:36px}.feature-split,.safe-browsing-section,.smart-route-section,.multi-device-section,.network-diagnosis-section,.account-security-section{grid-template-columns:1fr 1fr}.privacy-guard-section{grid-template-columns:1.1fr .9fr}
}
@media (min-width:980px){
  .nav-toggle-label{display:none}.site-nav{display:flex;position:static;align-items:center;gap:2px;background:transparent;border:0;box-shadow:none;padding:0}.nav-toggle:checked ~ .site-nav{display:flex}
  .hero-grid{grid-template-columns:1.06fr .94fr}.hero-shell{padding:54px}.daily-scenes{grid-template-columns:repeat(3,1fr)}
  .bento-feature-center{grid-template-columns:repeat(6,1fr);grid-auto-rows:minmax(180px,auto)}.bento-card{grid-column:span 2}.bento-card.large{grid-column:span 3}.bento-card.tall{grid-row:span 2}.bento-card.wide{grid-column:span 4}
  .wifi-grid,.privacy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.page-layout{grid-template-columns:minmax(0,1fr) 320px}.footer-grid{grid-template-columns:1.4fr .8fr .8fr .9fr}
  .section{padding:90px 0}.cta-box{padding:54px}
}
@media (max-width:520px){
  .container{width:min(100% - 24px,1120px)}.hero-shell{border-radius:28px;padding:22px}.download-btn{width:100%;padding:14px 18px}.status-card{position:static;margin:8px;display:inline-block}.hero-art{display:block;text-align:center}.hero-art img{margin:0 auto}.floating-tags{display:none}.section{padding:58px 0}.article-panel,.feature-panel,.wifi-panel,.privacy-strip{padding:20px;border-radius:26px}
}