:root{
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#64748b;
    --light:#f5f7fb;
    --line:#e6ebf2;
    --white:#ffffff;
    --shadow:0 18px 45px rgba(31,41,55,.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;background:#f7f9fc;color:var(--text);line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
main{overflow:hidden}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.narrow-container{width:min(880px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid rgba(230,235,242,.9)}
.header-inner{width:min(1160px,calc(100% - 28px));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#111827;letter-spacing:.02em}
.logo img,.footer-logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;gap:6px;align-items:center}
.site-nav a{padding:9px 12px;border-radius:999px;color:#42526b;font-size:14px;font-weight:650}
.site-nav a:hover{background:#eef4ff;color:#195ecb}
.nav-toggle{display:none}
.nav-toggle-label{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;display:grid;place-items:center;background:#fff;gap:4px;padding:10px;cursor:pointer}
.nav-toggle-label span{width:18px;height:2px;background:#334155;border-radius:99px;display:block}
.nav-toggle:checked~.site-nav{display:grid;position:absolute;left:16px;right:16px;top:76px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:14px}
.nav-toggle:checked~.site-nav a{padding:12px 14px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:#2980FE;color:#fff!important;font-weight:800;box-shadow:0 14px 26px rgba(41,128,254,.24);transition:.2s ease;white-space:nowrap}
.download-btn:hover{background:#1768E8;transform:translateY(-1px);box-shadow:0 18px 30px rgba(23,104,232,.28)}
.section{padding:64px 0}
.section-head{margin-bottom:26px}
.section-kicker,.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#edf5ff;color:#1665d8;font-weight:800;font-size:13px;margin-bottom:12px}
.section h2,.section-head h2{font-size:clamp(28px,5vw,44px);line-height:1.2;margin:0 0 12px;color:#111827;letter-spacing:-.04em}
.section-head p,.lead{margin:0;color:var(--muted);font-size:17px}
.network-manager-hero{padding:24px 0 48px;background:linear-gradient(180deg,#f7f9fc,#fff)}
.hero-panel{width:min(1160px,calc(100% - 28px));margin:0 auto;border-radius:34px;background:var(--gradient);padding:30px 22px;position:relative;overflow:hidden;box-shadow:0 28px 70px rgba(80,78,220,.28)}
.hero-panel:before,.cta-section:before{content:"";position:absolute;inset:auto -20% -45% 20%;height:280px;background:rgba(255,255,255,.18);filter:blur(50px);border-radius:999px}
.hero-grid{display:grid;gap:30px;position:relative;z-index:1;align-items:center}
.hero-copy{color:#fff}
.hero-copy h1{font-size:clamp(36px,9vw,68px);line-height:1.05;letter-spacing:-.06em;margin:0 0 18px;max-width:720px}
.hero-copy p{font-size:18px;color:rgba(255,255,255,.9);margin:0 0 22px;max-width:680px}
.hero-tags,.floating-tags,.mini-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span,.floating-tags span,.mini-tags span{display:inline-flex;align-items:center;border-radius:999px;padding:7px 12px;background:rgba(255,255,255,.16);color:#fff;font-weight:700;font-size:13px;border:1px solid rgba(255,255,255,.22)}
.hero-visual{position:relative;display:grid;place-items:center;min-height:320px}
.hero-visual .phone-card{width:min(380px,90%);background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);border-radius:34px;padding:18px;box-shadow:0 24px 60px rgba(19,31,74,.18)}
.hero-visual img{border-radius:28px;margin:auto;max-height:380px;object-fit:contain}
.float-card{position:absolute;background:rgba(255,255,255,.92);border:1px solid rgba(255,255,255,.8);border-radius:18px;padding:10px 14px;box-shadow:0 12px 26px rgba(31,41,55,.12);font-weight:800;color:#1e40af;font-size:13px}
.float-card.one{left:0;top:38px}.float-card.two{right:0;top:92px}.float-card.three{left:8px;bottom:58px}.float-card.four{right:16px;bottom:22px}
.daily-scenes{background:#fff}
.scene-grid{display:grid;gap:16px}
.scene-card,.bento-card,.white-card,.risk-card,.faq-item,.step-card,.note-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 14px 35px rgba(31,41,55,.05)}
.scene-card .tag,.bento-card .tag,.risk-card .tag{display:inline-flex;color:#2980FE;font-weight:850;font-size:13px;margin-bottom:10px}
.scene-card h3,.bento-card h3,.white-card h3,.risk-card h3,.step-card h3{margin:0 0 8px;font-size:20px;color:#111827;line-height:1.25}
.scene-card p,.bento-card p,.white-card p,.risk-card p,.step-card p{margin:0 0 12px;color:var(--muted)}
.text-link{color:#1768E8;font-weight:800;display:inline-flex;align-items:center;gap:6px}
.text-link:after{content:"›";font-size:18px}
.bento-feature-center{background:#f5f8ff}
.bento-grid{display:grid;gap:16px}
.bento-card{min-height:180px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;position:relative}
.bento-card.large{background:linear-gradient(135deg,#fff,#eef5ff)}
.bento-card.accent{border-color:#dbeafe;background:linear-gradient(135deg,#f8fbff,#fff)}
.feature-split,.smart-route-card,.device-layout,.diagnosis-layout,.account-layout{display:grid;gap:24px;align-items:center}
.feature-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.feature-panel img{border-radius:24px;margin:auto;max-height:390px;object-fit:contain}
.feature-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
.feature-list li{padding:12px 14px;border-radius:16px;background:#f6f8fb;color:#475569;border:1px solid #edf1f7}
.safe-browsing-section{background:#fff}
.smart-route-section{background:#f4f8ff}
.route-metrics{display:grid;gap:12px;margin-top:18px}
.metric{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}
.metric strong{display:block;font-size:24px;color:#111827}.metric span{color:var(--muted);font-size:14px}
.public-wifi-section{background:#fff}
.wifi-panel{border-radius:34px;background:linear-gradient(135deg,#f8fbff,#fff);border:1px solid var(--line);padding:24px;box-shadow:var(--shadow)}
.wifi-grid{display:grid;gap:16px;align-items:center}.wifi-cards{display:grid;gap:12px}.wifi-image img{border-radius:26px;margin:auto;max-height:360px;object-fit:contain}
.privacy-guard-section{background:#f7f9fc}.privacy-row{display:grid;gap:16px}.privacy-visual{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}.privacy-visual img{margin:auto;border-radius:26px;max-height:340px;object-fit:contain}
.multi-device-section{background:#fff}.device-stack{display:grid;gap:14px}.device-card{border:1px solid var(--line);background:#fff;border-radius:22px;padding:18px;box-shadow:0 12px 28px rgba(31,41,55,.05)}.device-card strong{display:block;color:#111827}.device-card span{color:var(--muted)}
.network-diagnosis-section{background:#f4f8ff}.diagnosis-steps{display:grid;gap:14px}.diagnosis-step{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}.num{flex:0 0 34px;width:34px;height:34px;border-radius:12px;background:#2980FE;color:#fff;display:grid;place-items:center;font-weight:850}.diagnosis-step p{margin:4px 0 0;color:var(--muted)}
.account-security-section{background:#fff}.checklist{display:grid;gap:12px;padding:0;margin:0;list-style:none}.checklist li{background:#f8fafc;border:1px solid var(--line);border-radius:16px;padding:13px 15px;color:#475569}.checklist li:before{content:"✓";color:#2980FE;font-weight:900;margin-right:8px}
.process-section{background:#f7f9fc}.process-steps{display:grid;gap:16px}.step-number{width:40px;height:40px;border-radius:15px;background:#eaf3ff;color:#1768E8;display:grid;place-items:center;font-weight:900;margin-bottom:12px}
.risk-section{background:#fff}.risk-grid{display:grid;gap:16px}.risk-card{border-left:4px solid #2980FE}.risk-card .action{display:block;margin-top:10px;color:#334155;font-weight:800}
.faq-section{background:#f7f9fc}.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px;margin:0 0 8px;color:#111827}.faq-item p{margin:0;color:var(--muted)}
.cta-section{position:relative;overflow:hidden;margin:48px auto 72px;width:min(1120px,calc(100% - 32px));border-radius:34px;background:var(--gradient);color:#fff;text-align:center;padding:44px 22px;box-shadow:0 28px 70px rgba(80,78,220,.24)}
.cta-section>*{position:relative;z-index:1}.cta-section h2{font-size:clamp(28px,6vw,46px);line-height:1.18;margin:0 0 12px}.cta-section p{max-width:720px;margin:0 auto 22px;color:rgba(255,255,255,.88)}
.page-hero{padding:48px 0 28px;background:linear-gradient(180deg,#f4f8ff,#fff)}.page-hero-card{background:#fff;border:1px solid var(--line);border-radius:32px;padding:30px;box-shadow:var(--shadow)}.page-hero h1{font-size:clamp(32px,7vw,54px);line-height:1.15;letter-spacing:-.05em;margin:0 0 14px;color:#111827}.page-hero p{margin:0;color:var(--muted);font-size:17px;max-width:760px}
.content-section{padding:36px 0 72px}.content-layout{display:grid;gap:22px}.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 12px 35px rgba(31,41,55,.05)}.article-card h2{margin:0 0 12px;font-size:26px;line-height:1.25}.article-card p{color:#526173;margin:0 0 14px}.article-card p:last-child{margin-bottom:0}
.side-panel{display:grid;gap:14px}.tip-box{background:#f6f9ff;border:1px solid #dfeafe;border-radius:22px;padding:18px}.tip-box h3{margin:0 0 10px;font-size:18px}.tip-box p,.tip-box li{color:#5c6b82}.tip-box ul,.article-card ol,.article-card ul{margin:0;padding-left:20px}.tip-box li,.article-card li{margin:7px 0}.download-line{margin-top:22px}.mini-grid{display:grid;gap:14px;margin-top:18px}.image-band{background:#fff;border:1px solid var(--line);border-radius:28px;padding:18px;box-shadow:var(--shadow)}.image-band img{border-radius:22px;margin:auto;max-height:320px;object-fit:contain}.two-col{display:grid;gap:16px}.legal-note{font-size:14px;color:#64748b;background:#f8fafc;border:1px solid var(--line);border-radius:18px;padding:14px;margin-top:16px}
.download-page .download-wrap{display:grid;gap:22px}.download-card{text-align:center;background:#fff;border:1px solid var(--line);border-radius:32px;padding:30px;box-shadow:var(--shadow)}.download-card p{color:var(--muted)}
.site-footer{background:#111827;color:#cbd5e1;padding:48px 0 0}.footer-grid{display:grid;gap:26px}.footer-logo{color:#fff;margin-bottom:12px}.site-footer p{margin:0;color:#94a3b8}.site-footer h3{color:#fff;margin:0 0 10px;font-size:16px}.site-footer a{display:block;color:#cbd5e1;margin:7px 0;font-size:14px}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:34px;text-align:center;padding:18px;color:#94a3b8;font-size:13px}
@media (min-width:700px){
    .scene-grid{grid-template-columns:repeat(2,1fr)}
    .bento-grid{grid-template-columns:repeat(2,1fr)}
    .risk-grid,.mini-grid,.two-col{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
    .privacy-row{grid-template-columns:repeat(3,1fr)}
    .footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}
}
@media (min-width:980px){
    .nav-toggle-label{display:none}.site-nav{display:flex}.header-inner{min-height:78px}
    .hero-panel{padding:58px}.hero-grid{grid-template-columns:1.08fr .92fr}.hero-copy p{font-size:20px}.hero-visual{min-height:450px}
    .scene-grid{grid-template-columns:repeat(3,1fr)}
    .bento-grid{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(190px,auto)}
    .bento-card.large{grid-column:span 2;grid-row:span 2}.bento-card.wide{grid-column:span 2}.bento-card.tall{grid-row:span 2}
    .feature-split,.smart-route-card,.device-layout,.diagnosis-layout,.account-layout{grid-template-columns:1fr 1fr;gap:38px}
    .wifi-grid{grid-template-columns:1.2fr .8fr}.route-metrics{grid-template-columns:repeat(3,1fr)}
    .process-steps{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(4,1fr)}
    .content-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start}.page-hero-card{padding:42px}
    .download-page .download-wrap{grid-template-columns:1fr 1fr;align-items:start}
}
@media (max-width:420px){
    .container,.narrow-container,.hero-panel,.cta-section{width:calc(100% - 24px)}
    .hero-panel{border-radius:26px;padding:26px 18px}.section{padding:50px 0}.float-card{position:static;margin:8px 4px 0 0;display:inline-flex}.hero-visual{display:block;text-align:center;min-height:auto}.hero-visual .phone-card{margin:20px auto 0}.download-btn{width:100%;min-height:52px}.page-hero-card,.article-card,.feature-panel,.wifi-panel{border-radius:24px;padding:20px}
}