:root{
  --brand-gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
  --blue:#2980FE;
  --blue-dark:#1768E8;
  --text:#22283A;
  --muted:#647086;
  --light:#F4F7FB;
  --line:#E5EAF2;
  --card:#FFFFFF;
  --radius:28px;
  --shadow:0 18px 50px rgba(31,47,84,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.72;font-size:16px;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}.wide-container{width:min(1220px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(229,234,242,.85)}
.header-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:16px}.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#1B2440;letter-spacing:.2px}.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}.nav-toggle{display:none}.mobile-nav-button{width:44px;height:44px;border:1px solid var(--line);border-radius:14px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:#fff}.mobile-nav-button span{width:18px;height:2px;background:#1E2A44;border-radius:5px}.main-nav{position:absolute;left:16px;right:16px;top:76px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:14px;display:none;grid-template-columns:1fr;gap:4px}.main-nav a{padding:12px 14px;border-radius:14px;color:#334057;font-size:15px}.main-nav a:hover,.main-nav .nav-download{background:#F0F6FF;color:var(--blue)}.nav-toggle:checked~.main-nav{display:grid}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 26px;border-radius:999px;background:var(--blue);color:#fff!important;font-weight:800;box-shadow:0 14px 28px rgba(41,128,254,.25);transition:.2s ease}.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.section{padding:68px 0}.section-muted{background:var(--light)}.section-title{margin:0 0 12px;font-size:clamp(28px,4vw,44px);line-height:1.18;color:#17213A}.section-lead{margin:0 0 28px;color:var(--muted);max-width:780px}.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:800;background:#EEF6FF;border:1px solid #D7E8FF;border-radius:999px;padding:7px 12px;font-size:13px}.gradient-bg{background:var(--brand-gradient);color:#fff}.gradient-bg .section-title,.gradient-bg .section-lead{color:#fff}.link-more{color:var(--blue);font-weight:800}.link-more:hover{text-decoration:underline}.soft-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.pill-list{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 0}.pill-list span{border:1px solid rgba(255,255,255,.45);background:rgba(255,255,255,.15);color:#fff;padding:7px 12px;border-radius:999px;font-size:13px}.check-list{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}.check-list li{position:relative;padding-left:28px;color:#4A566F}.check-list li:before{content:"";position:absolute;left:0;top:.55em;width:14px;height:14px;border-radius:50%;background:var(--blue);box-shadow:inset 0 0 0 4px #DCEBFF}.note-box{border-left:4px solid var(--blue);background:#F5F9FF;border-radius:18px;padding:18px;color:#536178}.image-panel{background:linear-gradient(145deg,#F5F8FF,#FFFFFF);border:1px solid var(--line);border-radius:34px;padding:18px;box-shadow:var(--shadow)}
.network-manager-hero{padding:40px 0 36px}.hero-shell{background:var(--brand-gradient);border-radius:36px;padding:28px;overflow:hidden;position:relative;color:#fff}.hero-shell:before{content:"";position:absolute;width:420px;height:420px;right:-120px;top:-130px;background:rgba(255,255,255,.18);filter:blur(12px);border-radius:50%}.hero-grid{position:relative;display:grid;gap:28px;align-items:center}.hero-copy h1{font-size:clamp(34px,7vw,62px);line-height:1.06;margin:14px 0 16px}.hero-copy p{font-size:17px;color:rgba(255,255,255,.9);max-width:620px}.hero-copy .download-btn{margin-top:8px}.hero-visual{position:relative;min-height:330px;display:flex;align-items:center;justify-content:center}.hero-visual img{width:min(360px,78vw);border-radius:30px;filter:drop-shadow(0 28px 42px rgba(10,15,40,.25))}.float-tag,.status-card{position:absolute;background:rgba(255,255,255,.94);color:#21304E;border:1px solid rgba(255,255,255,.65);box-shadow:0 14px 40px rgba(12,23,58,.16);border-radius:18px;padding:10px 13px;font-weight:800;font-size:13px}.float-tag.one{left:8px;top:38px}.float-tag.two{right:10px;top:72px}.float-tag.three{left:4px;bottom:80px}.float-tag.four{right:4px;bottom:34px}.status-card{left:50%;bottom:0;transform:translateX(-50%);width:min(290px,86%);font-weight:600}.status-card strong{display:block;color:#142348;margin-bottom:4px}.status-card span{color:#657188;font-size:12px}.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32);border-radius:999px;padding:8px 12px;font-size:13px}
.daily-scenes{display:grid;gap:16px}.scene-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:0 10px 30px rgba(22,38,75,.06)}.scene-card .tag{color:var(--blue);font-weight:800;font-size:13px}.scene-card h3{margin:8px 0 8px;font-size:21px}.scene-card p{color:var(--muted);margin:0 0 12px}
.bento-feature-center{display:grid;gap:16px}.bento-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;min-height:180px;box-shadow:0 12px 34px rgba(22,38,75,.06);display:flex;flex-direction:column;justify-content:space-between}.bento-card.large{background:linear-gradient(145deg,#FFFFFF,#F4F8FF)}.bento-card h3{margin:8px 0 8px;font-size:23px}.bento-card p{margin:0 0 18px;color:var(--muted)}.bento-card .mini-label{color:var(--blue);font-weight:800;font-size:13px}
.split-section,.safe-browsing-section,.smart-route-section,.multi-device-section{display:grid;gap:26px;align-items:center}.feature-points{display:grid;gap:14px;margin-top:20px}.feature-point{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}.feature-point strong{display:block;color:#1B2B52}.feature-point span{color:var(--muted);font-size:14px}.smart-route-section .route-panel{background:#fff;border-radius:32px;border:1px solid var(--line);padding:24px;box-shadow:var(--shadow)}.route-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.route-row:last-child{border-bottom:0}.route-row span{color:#69758B}.route-dot{width:10px;height:10px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 6px #E7F1FF}.public-wifi-section{display:grid;gap:22px}.wifi-grid,.privacy-guard-section,.risk-grid,.faq-list,.content-grid,.card-grid{display:grid;gap:16px}.wifi-card,.privacy-card,.risk-card,.faq-item,.guide-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:0 10px 28px rgba(22,38,75,.05)}.wifi-card h3,.privacy-card h3,.risk-card h3,.guide-card h3{margin:0 0 8px;color:#1A294A}.wifi-card p,.privacy-card p,.risk-card p,.guide-card p{margin:0;color:var(--muted)}.privacy-guard-section{align-items:stretch}.privacy-card{min-height:180px}.device-stack{display:grid;gap:14px}.device-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;display:flex;gap:14px;align-items:center}.device-icon{width:46px;height:46px;border-radius:16px;background:#EFF6FF;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900}.network-diagnosis-section{display:grid;gap:18px}.diagnosis-steps{counter-reset:step;display:grid;gap:14px}.diagnosis-step{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;position:relative}.diagnosis-step:before{content:counter(step);width:34px;height:34px;border-radius:12px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:10px}.account-security-section{display:grid;gap:18px}.safety-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}.safety-panel h3{margin-top:0}.process-steps{display:grid;gap:14px;counter-reset:process}.process-step{counter-increment:process;background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;position:relative}.process-step:before{content:"0" counter(process);display:inline-flex;margin-bottom:12px;background:#EAF3FF;color:var(--blue);border-radius:999px;padding:5px 10px;font-weight:900}.risk-card{border-left:4px solid var(--blue)}.risk-card strong{color:#17213A}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:var(--muted)}.cta-section{padding:64px 0}.cta-box{background:var(--brand-gradient);border-radius:34px;padding:34px;color:#fff;text-align:center;position:relative;overflow:hidden}.cta-box h2{font-size:clamp(28px,5vw,46px);margin:0 0 12px}.cta-box p{max-width:680px;margin:0 auto 22px;color:rgba(255,255,255,.88)}.page-hero{padding:56px 0 34px;background:linear-gradient(180deg,#F4F7FF 0%,#FFFFFF 100%)}.page-hero h1{font-size:clamp(32px,6vw,52px);line-height:1.14;margin:14px 0 12px}.page-hero p{color:var(--muted);max-width:760px;margin:0}.page-layout{display:grid;gap:22px;align-items:start}.article-card{background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}.article-card h2{font-size:26px;margin:0 0 12px}.article-card p{color:#4F5A71}.aside-card{background:#F6F9FE;border:1px solid var(--line);border-radius:28px;padding:22px;position:sticky;top:96px}.aside-card h3{margin-top:0}.simple-steps{display:grid;gap:12px;margin:20px 0}.simple-step{display:grid;grid-template-columns:auto 1fr;gap:12px;background:#F8FAFD;border:1px solid var(--line);border-radius:18px;padding:14px}.simple-step b{width:34px;height:34px;border-radius:12px;background:#EAF3FF;color:var(--blue);display:flex;align-items:center;justify-content:center}.simple-step strong{display:block}.simple-step span{color:var(--muted);font-size:14px}.download-panel{max-width:760px;margin:0 auto;text-align:center;background:#fff;border:1px solid var(--line);border-radius:34px;padding:32px;box-shadow:var(--shadow)}.download-panel .download-btn{margin:18px 0}.download-panel .simple-steps{text-align:left}.site-footer{background:#111A2D;color:#D6DDEC;padding:52px 0 22px}.footer-grid{display:grid;gap:24px}.footer-brand{font-size:22px;font-weight:900;color:#fff;margin-bottom:8px}.site-footer p{color:#AAB4C7;margin:0}.site-footer h3{font-size:16px;color:#fff;margin:0 0 10px}.site-footer a{display:block;color:#AAB4C7;margin:7px 0}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;color:#94A0B8;font-size:14px}
@media (min-width:720px){
  .daily-scenes{grid-template-columns:repeat(2,1fr)}.wifi-grid,.card-grid{grid-template-columns:repeat(2,1fr)}.privacy-guard-section{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr}.page-layout{grid-template-columns:minmax(0,1fr) 300px}.content-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:960px){
  .mobile-nav-button{display:none}.main-nav{position:static;display:flex;align-items:center;gap:2px;background:transparent;border:0;box-shadow:none;padding:0}.main-nav a{font-size:14px;padding:8px 10px}.main-nav .nav-download{border:1px solid #CFE3FF}.hero-shell{padding:48px}.hero-grid{grid-template-columns:1.03fr .97fr}.network-manager-hero{padding:54px 0 42px}.daily-scenes{grid-template-columns:repeat(3,1fr)}.bento-feature-center{grid-template-columns:repeat(6,1fr);grid-auto-rows:minmax(170px,auto)}.bento-card{grid-column:span 2}.bento-card.large{grid-column:span 3}.bento-card.tall{grid-row:span 2}.safe-browsing-section,.smart-route-section,.multi-device-section,.split-section{grid-template-columns:1fr 1fr}.public-wifi-section{grid-template-columns:1.05fr .95fr}.network-diagnosis-section,.account-security-section{grid-template-columns:.9fr 1.1fr}.risk-grid{grid-template-columns:repeat(3,1fr)}.section{padding:84px 0}.cta-box{padding:50px}.article-card{padding:34px}.download-panel{padding:44px}
}
@media (max-width:420px){
  .container,.wide-container{width:min(100% - 22px,1120px)}.hero-shell{border-radius:26px;padding:22px}.float-tag{display:none}.hero-visual{min-height:260px}.section{padding:52px 0}.soft-card,.article-card,.download-panel{border-radius:24px;padding:20px}.download-btn{width:100%}.main-nav{left:11px;right:11px}.logo span{font-size:15px}
}