:root{
  --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#1f2937;
  --muted:#667085;
  --soft:#f5f7fb;
  --line:#e6ebf3;
  --card:#ffffff;
  --deep:#111827;
  --radius-lg:34px;
  --radius-md:24px;
  --shadow:0 18px 45px rgba(28,45,84,.08);
}
*{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%;display:block}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,235,243,.8)}
.header-inner{max-width:1180px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--deep);font-size:18px;white-space:nowrap}.logo{width:38px;height:38px;border-radius:12px;object-fit:cover}.desktop-nav{display:none;align-items:center;gap:6px}.desktop-nav a{padding:9px 12px;border-radius:999px;color:#475467;font-size:14px}.desktop-nav a:hover,.desktop-nav a.active{background:#eef4ff;color:var(--blue)}.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;color:#344054;font-weight:700}.mobile-nav{display:none;padding:6px 18px 16px;background:#fff;border-top:1px solid var(--line)}.mobile-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mobile-nav a{padding:10px 12px;background:#f7f9fc;border-radius:14px;font-size:14px;color:#344054}.container{max-width:1180px;margin:0 auto;padding:0 18px}.section{padding:56px 0}.section-heading{max-width:760px;margin:0 auto 28px;text-align:center}.eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 12px;background:#eef4ff;color:var(--blue);font-size:13px;font-weight:700}.section-heading h2,.page-title h1{margin:12px 0;color:var(--deep);line-height:1.2}.section-heading p,.page-title p,.muted{color:var(--muted)}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;border-radius:999px;background:var(--blue);color:#fff!important;font-weight:800;box-shadow:0 12px 26px rgba(41,128,254,.26);transition:.2s ease}.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}.text-link{color:var(--blue);font-weight:800}.network-manager-hero{padding:30px 0 56px}.hero-shell{background:var(--brand-gradient);border-radius:0 0 36px 36px;overflow:hidden}.hero-grid{max-width:1180px;margin:0 auto;padding:42px 18px;display:grid;gap:28px;align-items:center;color:#fff}.hero-copy h1{font-size:34px;line-height:1.15;margin:12px 0 16px;letter-spacing:-.02em}.hero-copy p{font-size:16px;color:rgba(255,255,255,.88);max-width:610px}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);padding:8px 12px;border-radius:999px;font-size:13px}.hero-visual{position:relative;min-height:320px;display:flex;align-items:center;justify-content:center}.hero-phone{width:min(340px,86vw);padding:18px;border-radius:32px;background:rgba(255,255,255,.18);box-shadow:0 28px 70px rgba(25,35,74,.28)}.float-card{position:absolute;background:#fff;color:#1f2937;border-radius:18px;padding:10px 14px;box-shadow:var(--shadow);font-size:13px;font-weight:800}.float-card.one{top:16px;left:12px}.float-card.two{right:10px;top:84px}.float-card.three{left:24px;bottom:52px}.float-card.four{right:20px;bottom:10px}.daily-scenes,.card-grid,.risk-grid,.faq-grid,.mini-grid{display:grid;gap:16px}.scene-card,.feature-card,.info-card,.risk-card,.faq-item,.step-card,.tip-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:0 12px 30px rgba(25,39,72,.04)}.scene-card strong,.feature-card h3,.info-card h3,.risk-card h3,.step-card h3,.tip-card h3{color:var(--deep);display:block;margin-bottom:8px}.scene-card .tag{display:inline-block;color:var(--blue);font-weight:800;font-size:13px;margin-bottom:10px}.bento-feature-center{display:grid;gap:16px}.feature-card{min-height:190px}.feature-card.large{background:linear-gradient(135deg,#fff 0%,#f3f7ff 100%)}.feature-card .small-label{color:var(--blue);font-weight:800;font-size:13px}.split-section{display:grid;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow)}.soft-section{background:var(--soft);border-radius:36px;padding:34px 18px}.visual-card{background:linear-gradient(180deg,#f7f9ff 0%,#fff 100%);border:1px solid var(--line);border-radius:30px;padding:18px;display:flex;align-items:center;justify-content:center}.bullets{display:grid;gap:10px;margin:18px 0}.bullets span{display:flex;gap:10px;align-items:flex-start;color:#344054}.bullets span:before{content:"";width:9px;height:9px;margin-top:10px;border-radius:50%;background:var(--blue);flex:0 0 9px}.public-wifi-section .wifi-panel{display:grid;gap:18px;align-items:center}.privacy-panel{display:grid;gap:16px}.device-stack{display:grid;gap:16px}.device-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px}.diagnosis-list{counter-reset:item;display:grid;gap:12px}.diagnosis-list li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px 16px}.diagnosis-list li:before{counter-increment:item;content:counter(item);display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eef4ff;color:var(--blue);font-weight:800;margin-right:8px}.check-list{display:grid;gap:12px;padding:0;margin:18px 0}.check-list li{list-style:none;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:18px}.process-steps{display:grid;gap:16px}.step-card .num{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:12px;background:var(--brand-gradient);color:#fff;font-weight:900;margin-bottom:12px}.risk-card{border-left:4px solid var(--blue)}.faq-item h3{font-size:17px;margin:0 0 8px}.cta-section{margin:52px auto 0;border-radius:34px;background:var(--brand-gradient);color:#fff;padding:38px 20px;text-align:center;max-width:1180px}.cta-section p{color:rgba(255,255,255,.86);max-width:720px;margin:0 auto 20px}.cta-section .download-btn{background:var(--blue)}.page-hero{background:linear-gradient(180deg,#f3f7ff 0%,#fff 100%);padding:44px 0 22px}.page-layout{display:grid;gap:22px;align-items:start}.page-title{max-width:780px}.content-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}.side-panel{background:#f7f9fc;border:1px solid var(--line);border-radius:26px;padding:22px}.side-panel a{display:block;color:var(--blue);font-weight:800;margin-top:10px}.article-block{margin:22px 0}.article-block h2{color:var(--deep);line-height:1.25}.notice{background:#f3f7ff;border:1px solid #dbe7ff;border-radius:22px;padding:18px}.download-box{margin-top:24px;padding:22px;border-radius:26px;background:#f7f9fc;border:1px solid var(--line);text-align:center}.download-page-grid{display:grid;gap:18px}.site-footer{background:#111827;color:#d0d5dd;margin-top:60px}.footer-inner{max-width:1180px;margin:0 auto;padding:42px 18px;display:grid;gap:28px}.footer-logo{width:42px;height:42px;border-radius:14px;object-fit:cover}.footer-brand p{max-width:440px;color:#b5bdca}.footer-links{display:grid;grid-template-columns:1fr;gap:20px}.footer-links h3{color:#fff;margin:0 0 10px}.footer-links a{display:block;color:#d0d5dd;margin:7px 0}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.08);padding:16px 18px;color:#98a2b3;font-size:14px}.safe-browsing-section,.smart-route-section,.public-wifi-section,.privacy-guard-section,.multi-device-section,.network-diagnosis-section,.account-security-section{position:relative}.content-narrow{max-width:860px;margin:0 auto}.table-like{display:grid;gap:12px}.table-like div{display:grid;grid-template-columns:1fr;gap:6px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}.table-like strong{color:var(--deep)}
@media (min-width:700px){.daily-scenes{grid-template-columns:repeat(2,1fr)}.card-grid,.risk-grid,.faq-grid,.mini-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.download-page-grid{grid-template-columns:repeat(2,1fr)}.footer-links{grid-template-columns:repeat(3,1fr)}.table-like div{grid-template-columns:160px 1fr}.hero-copy h1{font-size:44px}}
@media (min-width:960px){.desktop-nav{display:flex}.nav-toggle,.mobile-nav{display:none!important}.hero-shell{border-radius:0 0 48px 48px}.hero-grid{grid-template-columns:1.05fr .95fr;padding:70px 18px}.hero-copy h1{font-size:58px}.daily-scenes{grid-template-columns:repeat(3,1fr)}.bento-feature-center{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(190px,auto)}.feature-card.large{grid-column:span 2}.feature-card.tall{grid-row:span 2}.split-section{grid-template-columns:1.04fr .96fr;padding:36px}.split-section.reverse .visual-card{order:-1}.public-wifi-section .wifi-panel{grid-template-columns:1.1fr .9fr}.privacy-panel{grid-template-columns:repeat(3,1fr)}.device-stack{grid-template-columns:1fr 1fr 1fr}.process-steps{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(4,1fr)}.page-layout{grid-template-columns:minmax(0,1fr) 310px}.footer-inner{grid-template-columns:.9fr 1.3fr}.section{padding:74px 0}.soft-section{padding:46px}.card-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:420px){.hero-copy h1{font-size:30px}.float-card{font-size:12px;padding:8px 10px}.scene-card,.feature-card,.info-card,.risk-card,.faq-item,.step-card,.tip-card,.content-panel{padding:18px}.download-btn{width:100%}.mobile-nav.open{grid-template-columns:1fr}.section{padding:44px 0}}