:root{
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#202B3C;
    --muted:#657084;
    --line:#E6EBF3;
    --soft:#F5F7FB;
    --soft-blue:#EEF5FF;
    --white:#FFFFFF;
    --shadow:0 18px 50px rgba(35,52,87,.10);
    --radius:26px;
}
*{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:#F7F9FD;line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
p{margin:0 0 14px;color:var(--muted)}
h1,h2,h3{margin:0;color:var(--text);line-height:1.22}
h1{font-size:clamp(34px,7vw,64px);letter-spacing:-1.2px}
h2{font-size:clamp(26px,4vw,42px);margin-bottom:16px}
h3{font-size:21px;margin-bottom:10px}
ul,ol{margin:12px 0 0;padding-left:20px;color:var(--muted)}
li{margin:8px 0}
.container{width:min(1180px,calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(230,235,243,.9)}
.nav-shell{width:min(1220px,calc(100% - 28px));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo-link{display:flex;align-items:center;gap:10px;font-weight:800;color:#15223A;white-space:nowrap}
.logo-img{width:40px;height:40px;border-radius:12px;object-fit:cover;box-shadow:0 8px 22px rgba(41,128,254,.16)}
.logo-text{font-size:20px;letter-spacing:.2px}
.site-nav{display:none;flex-direction:column;position:absolute;left:14px;right:14px;top:72px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}
.site-nav a{padding:11px 13px;border-radius:14px;color:#3E4A5F;font-size:15px}
.site-nav a.active,.site-nav a:hover{background:var(--soft-blue);color:var(--blue)}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-toggle-label{display:flex;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:14px;background:#fff}
.nav-toggle-label span{width:18px;height:2px;background:#27364F;border-radius:999px}
.nav-toggle:checked~.site-nav{display:flex}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 26px;border-radius:999px;background:var(--blue);color:#fff;font-weight:800;letter-spacing:.3px;box-shadow:0 14px 28px rgba(41,128,254,.22);transition:transform .2s ease,background .2s ease,box-shadow .2s ease}
.download-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 16px 34px rgba(23,104,232,.25)}
.text-link{display:inline-flex;margin-top:10px;color:var(--blue);font-weight:750;align-items:center;gap:6px}
.text-link:after{content:"→";font-weight:900}
.badge{display:inline-flex;align-items:center;gap:7px;border-radius:999px;padding:7px 13px;background:#EEF5FF;color:var(--blue);font-size:13px;font-weight:800;margin-bottom:14px}
.eyebrow{display:inline-block;font-size:13px;font-weight:800;color:var(--blue);background:#EEF5FF;border-radius:999px;padding:6px 12px;margin-bottom:12px}
.section{padding:58px 0}
.section-head{max-width:780px;margin:0 auto 28px;text-align:center}
.section-head p{font-size:17px}
.connection-workspace-hero{background:var(--gradient);padding:38px 0 58px;color:#fff;position:relative;overflow:hidden}
.connection-workspace-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.25),transparent 34%),radial-gradient(circle at 10% 80%,rgba(255,255,255,.14),transparent 28%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:30px;align-items:center}
.hero-copy h1,.hero-copy p{color:#fff}
.hero-copy p{font-size:18px;max-width:660px;color:rgba(255,255,255,.88)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 24px}
.hero-tags span{padding:8px 12px;border:1px solid rgba(255,255,255,.34);background:rgba(255,255,255,.13);border-radius:999px;color:#fff;font-size:14px}
.hero-visual{position:relative;min-height:370px;border-radius:34px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);padding:18px;box-shadow:0 30px 80px rgba(26,31,63,.22)}
.hero-device{width:min(330px,78%);margin:28px auto 0;filter:drop-shadow(0 24px 34px rgba(20,28,70,.24))}
.status-panel{position:absolute;right:18px;top:18px;width:min(260px,60%);background:#fff;color:var(--text);border-radius:24px;padding:18px;box-shadow:var(--shadow)}
.status-row{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:10px 0;font-size:14px;color:var(--muted)}
.status-row:last-child{border-bottom:0}
.status-dot{width:10px;height:10px;border-radius:999px;background:#2FD36B;box-shadow:0 0 0 6px rgba(47,211,107,.12)}
.floating-task{position:absolute;left:18px;bottom:18px;background:#fff;color:var(--text);border-radius:22px;padding:15px;width:min(245px,68%);box-shadow:var(--shadow)}
.floating-task strong{display:block;margin-bottom:4px}
.floating-task span{color:var(--muted);font-size:13px}
.quick-task-entries{margin-top:-34px;position:relative;z-index:5}
.quick-grid{display:grid;grid-template-columns:1fr;gap:16px}
.quick-card,.task-card,.capability-card,.info-card,.risk-card,.faq-item,.page-card,.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 34px rgba(35,52,87,.06)}
.quick-card .label,.capability-card .label{display:inline-block;color:var(--blue);background:#EEF5FF;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:850;margin-bottom:10px}
.connection-capability-overview{background:#fff}
.capability-grid{display:grid;grid-template-columns:1fr;gap:16px}
.capability-card.featured{background:linear-gradient(180deg,#fff,#F4F8FF);border-color:#DDE8FF}
.capability-card p{min-height:54px}
.split-section{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.split-section.reverse .image-card{order:-1}
.image-card{background:linear-gradient(180deg,#F6F8FF,#EEF3FF);border-radius:30px;padding:22px;border:1px solid #E4EBFA;min-height:260px;display:flex;align-items:center;justify-content:center}
.feature-list{display:grid;grid-template-columns:1fr;gap:12px;margin:18px 0}
.feature-list span,.mini-tag{display:inline-flex;align-items:center;background:#F6F8FC;border:1px solid var(--line);border-radius:16px;padding:10px 12px;color:#4F5B70;font-weight:650}
.encrypted-tunnel-section{background:#F2F6FF}
.security-panel{display:grid;grid-template-columns:1fr;gap:18px;align-items:center;background:#fff;border-radius:34px;border:1px solid #DFE8F8;padding:24px;box-shadow:var(--shadow)}
.security-cards{display:grid;grid-template-columns:1fr;gap:14px;margin-top:18px}
.route-optimization-section{background:#F7F9FD}
.route-board{display:grid;grid-template-columns:1fr;gap:18px}
.route-stat{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px}
.route-bar{height:9px;background:#E9EEF7;border-radius:999px;overflow:hidden;margin:12px 0}
.route-bar span{display:block;height:100%;background:var(--blue);border-radius:999px}
.device-showcase{display:grid;grid-template-columns:1fr;gap:18px;align-items:center}
.device-stack{display:grid;gap:14px}
.device-mini{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:0 10px 30px rgba(35,52,87,.06)}
.data-boundary-section{background:#fff}
.boundary-grid,.scenario-grid,.risk-grid,.faq-grid{display:grid;grid-template-columns:1fr;gap:16px}
.connection-checkup-section{background:#F2F6FF}
.checkup-board{display:grid;grid-template-columns:1fr;gap:18px;align-items:center}
.process-steps{display:grid;grid-template-columns:1fr;gap:14px;counter-reset:step}
.step-card{position:relative;padding-left:70px}
.step-number{position:absolute;left:20px;top:22px;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.safety-panel{background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.risk-card{border-left:4px solid var(--blue)}
.faq-item h3{font-size:18px}
.cta-section{background:var(--gradient);color:#fff;border-radius:34px;padding:34px 22px;text-align:center;position:relative;overflow:hidden}
.cta-section h2,.cta-section p{color:#fff}
.cta-section p{max-width:680px;margin:0 auto 20px;color:rgba(255,255,255,.88)}
.page-hero{background:var(--gradient);padding:54px 0;color:#fff}
.page-hero h1,.page-hero p{color:#fff}
.page-hero p{max-width:820px;color:rgba(255,255,255,.88);font-size:18px}
.page-layout{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}
.article-panel{background:#fff;border:1px solid var(--line);border-radius:34px;padding:24px;box-shadow:var(--shadow)}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:22px;box-shadow:0 12px 34px rgba(35,52,87,.06)}
.side-panel a{display:block;padding:10px 0;color:var(--blue);font-weight:750;border-bottom:1px solid var(--line)}
.side-panel a:last-child{border-bottom:0}
.check-list{display:grid;grid-template-columns:1fr;gap:12px;margin:18px 0}
.check-list div{background:#F6F8FC;border:1px solid var(--line);border-radius:18px;padding:14px}
.note-box{background:#EEF5FF;border:1px solid #DDE8FF;border-radius:22px;padding:18px;margin:18px 0;color:#50607A}
.download-panel{text-align:center;background:#fff;border:1px solid var(--line);border-radius:34px;padding:32px;box-shadow:var(--shadow)}
.install-steps{display:grid;grid-template-columns:1fr;gap:14px;margin:22px 0}
.install-step{display:flex;gap:14px;align-items:flex-start;background:#F6F8FC;border:1px solid var(--line);border-radius:20px;padding:16px}
.install-step strong{display:grid;place-items:center;min-width:32px;height:32px;border-radius:50%;background:var(--blue);color:#fff}
.site-footer{background:#182234;color:#CFD8EA;padding:46px 0 0;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:24px}
.footer-brand{font-size:20px;font-weight:850;color:#fff;margin-bottom:10px}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:12px}
.site-footer a{display:block;color:#CFD8EA;margin:8px 0}
.site-footer p{color:#AEB9CC}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:28px;padding:18px;text-align:center;color:#AEB9CC;font-size:14px}
@media (min-width:680px){
    .quick-grid,.security-cards,.boundary-grid,.scenario-grid,.risk-grid,.faq-grid,.install-steps{grid-template-columns:repeat(2,1fr)}
    .capability-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
    .feature-list{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:980px){
    .site-nav{display:flex;position:static;flex-direction:row;background:transparent;border:0;border-radius:0;box-shadow:none;padding:0;align-items:center;gap:2px}
    .site-nav a{font-size:14px;padding:9px 10px}
    .nav-toggle-label{display:none}
    .connection-workspace-hero{padding:68px 0 88px}
    .hero-grid{grid-template-columns:1.02fr .98fr;gap:46px}
    .hero-visual{min-height:470px}
    .hero-device{width:370px;margin-top:54px}
    .quick-grid{grid-template-columns:repeat(4,1fr)}
    .capability-grid{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(190px,auto)}
    .capability-card.featured{grid-column:span 2;grid-row:span 1}
    .split-section{grid-template-columns:1fr 1fr;padding:34px}
    .split-section.reverse .image-card{order:0}
    .security-panel{grid-template-columns:1.05fr .95fr;padding:34px}
    .route-board,.device-showcase,.checkup-board{grid-template-columns:1fr 1fr}
    .boundary-grid,.scenario-grid{grid-template-columns:repeat(3,1fr)}
    .risk-grid{grid-template-columns:repeat(4,1fr)}
    .faq-grid{grid-template-columns:repeat(2,1fr)}
    .page-layout{grid-template-columns:minmax(0,1fr) 320px}
    .article-panel{padding:34px}
    .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}
    .section{padding:78px 0}
}
@media (max-width:420px){
    .container{width:min(100% - 28px,1180px)}
    .download-btn{width:100%;padding-left:18px;padding-right:18px}
    .status-panel{position:relative;right:auto;top:auto;width:100%;margin-top:0}
    .floating-task{position:relative;left:auto;bottom:auto;width:100%;margin-top:14px}
    .hero-device{margin-top:18px}
    .hero-visual{min-height:auto}
    .step-card{padding-left:20px;padding-top:70px}
    .step-number{top:20px}
}