:root{
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2a44;
    --muted:#667085;
    --soft:#f6f8fc;
    --line:#e6ebf3;
    --card:#ffffff;
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --shadow:0 16px 45px rgba(31,42,68,.08);
    --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",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}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(230,235,243,.9)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:#15213a}
.logo img{width:42px;height:42px;border-radius:14px;object-fit:cover;box-shadow:0 8px 20px rgba(41,128,254,.18)}
.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;color:var(--text);font-weight:700}
.main-nav{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}
.main-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.main-nav a{padding:10px 12px;border-radius:14px;color:#536079;font-size:14px;font-weight:700}
.main-nav a.active,.main-nav a:hover{background:#eef5ff;color:var(--blue)}
.section{padding:58px 0}
.section.alt{background:var(--soft)}
.section-head{margin-bottom:26px;max-width:760px}
.kicker,.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:13px;font-weight:800;margin-bottom:12px}
h1,h2,h3{line-height:1.25;margin:0 0 14px;color:#15213a}
h1{font-size:clamp(34px,8vw,64px);letter-spacing:-1.8px}
h2{font-size:clamp(26px,5.8vw,42px);letter-spacing:-.8px}
h3{font-size:21px}
p{margin:0 0 14px;color:var(--muted)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:var(--blue);color:#fff!important;font-weight:800;box-shadow:0 12px 26px rgba(41,128,254,.28);transition:.2s ease}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.text-link{color:var(--blue);font-weight:800}
.text-link:hover{text-decoration:underline}
.network-manager-hero{padding:34px 0 54px;background:linear-gradient(180deg,#f7f9ff 0%,#fff 78%)}
.hero-panel{position:relative;overflow:hidden;border-radius:34px;background:var(--gradient);padding:32px;color:#fff;box-shadow:0 26px 70px rgba(69,82,197,.18)}
.hero-panel:before,.cta-section:before{content:"";position:absolute;inset:auto -10% -35% 45%;height:320px;background:rgba(255,255,255,.18);filter:blur(20px);border-radius:50%}
.hero-content{position:relative;z-index:1;display:grid;gap:28px;align-items:center}
.hero-copy h1,.hero-copy p{color:#fff}.hero-copy p{font-size:18px;opacity:.92;max-width:680px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 24px}.hero-tags span{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);font-size:13px;font-weight:800}
.hero-visual{position:relative}.hero-visual img{border-radius:30px;box-shadow:0 26px 65px rgba(20,25,60,.22)}
.float-card{position:absolute;background:rgba(255,255,255,.94);color:#15213a;border:1px solid rgba(255,255,255,.6);box-shadow:0 14px 30px rgba(28,42,82,.18);padding:10px 12px;border-radius:18px;font-weight:800;font-size:13px}.float-card.one{left:8%;top:6%}.float-card.two{right:2%;top:28%}.float-card.three{left:4%;bottom:10%}.float-card.four{right:8%;bottom:5%}
.daily-scenes{display:grid;gap:16px}.scene-card,.bento-card,.info-card,.risk-card,.faq-item,.step-card,.check-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 32px rgba(31,42,68,.045)}
.scene-card{position:relative;overflow:hidden}.scene-card:before{content:"";display:block;width:44px;height:4px;border-radius:99px;background:var(--blue);margin-bottom:16px}.scene-card h3{margin-bottom:8px}
.bento-feature-center{display:grid;gap:16px}.bento-card{min-height:178px;display:flex;flex-direction:column;justify-content:space-between}.bento-card.large{background:linear-gradient(180deg,#fff,#f7fbff)}.bento-card .boundary{font-size:13px;color:#7d89a0;margin-top:12px;border-top:1px solid var(--line);padding-top:12px}
.split-section{display:grid;gap:24px;align-items:center}.feature-panel{background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}.feature-panel img{border-radius:28px}.feature-points{display:grid;gap:12px;margin:18px 0}.feature-points li{list-style:none;background:#f6f9ff;border:1px solid #e4edfb;border-radius:18px;padding:12px 14px;color:#536079}.feature-points ul{padding:0;margin:0}
.safe-browsing-section,.public-wifi-section,.privacy-guard-section,.multi-device-section,.network-diagnosis-section,.account-security-section,.smart-route-section{position:relative}
.smart-route-section{background:#f7f9fe}.route-panel{display:grid;gap:18px}.route-status{display:grid;gap:12px}.route-status div{padding:16px;border-radius:20px;background:#fff;border:1px solid var(--line)}
.wifi-grid,.privacy-grid,.risk-grid,.support-grid,.cards-grid{display:grid;gap:16px}.public-wifi-section .wifi-main{background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.privacy-panel{background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px}.device-card{background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.process-steps{display:grid;gap:14px}.step-card{position:relative}.step-number{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border-radius:14px;background:#eef5ff;color:var(--blue);font-weight:900;margin-bottom:12px}
.risk-card{border-left:4px solid var(--blue)}.risk-card strong{display:block;color:#15213a;margin-bottom:8px}.risk-card em{font-style:normal;color:#536079;font-size:14px}
.faq-list{display:grid;gap:12px}.faq-item h3{font-size:18px;margin-bottom:6px}.cta-section{position:relative;overflow:hidden;text-align:center;background:var(--gradient);border-radius:34px;padding:38px 24px;color:#fff}.cta-section h2,.cta-section p{color:#fff}.cta-section p{opacity:.9;max-width:700px;margin-left:auto;margin-right:auto}.cta-section .download-btn{background:#2980FE}.cta-section .download-btn:hover{background:#1768E8}
.page-hero{padding:46px 0;background:linear-gradient(180deg,#f6f9ff 0%,#fff 100%)}.page-hero-card{border-radius:34px;background:#fff;border:1px solid var(--line);padding:28px;box-shadow:var(--shadow)}.page-layout{display:grid;gap:22px;align-items:start}.article-body{background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}.article-body h2{font-size:27px;margin-top:14px}.side-panel{background:#f7f9fe;border:1px solid var(--line);border-radius:28px;padding:20px;position:sticky;top:94px}.side-panel a{display:block;color:var(--blue);font-weight:800;margin:8px 0}.check-list{display:grid;gap:12px;margin:18px 0}.check-list div{padding:14px 16px;border-radius:18px;background:#f8fbff;border:1px solid #e5edf8}.note-box{border-radius:24px;background:#eef5ff;border:1px solid #dbe9ff;padding:18px;margin:18px 0}.download-single{margin-top:24px}
.download-steps{counter-reset:dl;display:grid;gap:14px}.download-steps div{counter-increment:dl;border:1px solid var(--line);background:#fff;border-radius:22px;padding:18px}.download-steps div:before{content:counter(dl);display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;background:#eef5ff;color:var(--blue);border-radius:12px;font-weight:900;margin-right:8px}
.site-footer{background:#111827;color:#d7deea;padding:46px 0 18px}.site-footer p{color:#aeb8ca}.footer-grid{display:grid;gap:24px}.footer-brand{font-size:24px;font-weight:900;color:#fff;margin-bottom:10px}.site-footer h3{color:#fff;font-size:17px}.site-footer a{display:block;color:#d7deea;margin:6px 0}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:16px;color:#aeb8ca;font-size:14px}
@media (min-width:700px){.daily-scenes{grid-template-columns:repeat(2,1fr)}.wifi-grid,.privacy-grid,.risk-grid,.support-grid,.cards-grid{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.2fr 1fr 1fr 1fr}.page-hero-card{padding:36px}.article-body{padding:32px}.main-nav.open{grid-template-columns:repeat(3,1fr)}}
@media (min-width:960px){.nav-toggle{display:none}.main-nav{position:static;display:flex;align-items:center;gap:2px;padding:0;border:0;box-shadow:none;background:transparent}.main-nav a{font-size:14px}.hero-panel{padding:54px}.hero-content{grid-template-columns:1.02fr .98fr}.daily-scenes{grid-template-columns:repeat(3,1fr)}.bento-feature-center{grid-template-columns:repeat(6,1fr);grid-auto-rows:minmax(166px,auto)}.bento-card{grid-column:span 2}.bento-card.large{grid-column:span 3;min-height:230px}.bento-card.tall{grid-row:span 2}.split-section{grid-template-columns:1fr 1fr}.route-panel{grid-template-columns:1.1fr .9fr}.wifi-grid,.privacy-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.support-grid,.cards-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.page-layout{grid-template-columns:minmax(0,1fr) 310px}.section{padding:76px 0}.page-hero{padding:64px 0 40px}}
@media (max-width:430px){.container{width:min(100% - 24px,1120px)}.hero-panel{border-radius:26px;padding:24px}.float-card{position:static;display:inline-flex;margin:6px 6px 0 0}.hero-visual img{border-radius:22px}.section{padding:44px 0}.scene-card,.bento-card,.info-card,.risk-card,.faq-item,.step-card,.check-card,.article-body,.page-hero-card{border-radius:22px;padding:18px}.download-btn{width:100%;min-height:52px}.footer-grid{grid-template-columns:1fr}.main-nav.open{grid-template-columns:1fr}}