*{box-sizing:border-box}
:root{
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#263142;
    --muted:#667085;
    --light:#F5F7FB;
    --line:#E5EAF2;
    --card:#FFFFFF;
    --soft:#EEF4FF;
    --radius:24px;
    --shadow:0 18px 45px rgba(32,52,89,.10);
}
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;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{
    position:sticky;
    top:0;
    z-index:20;
    background:rgba(255,255,255,.94);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(229,234,242,.9);
}
.nav-shell{
    width:min(1180px,calc(100% - 28px));
    margin:0 auto;
    min-height:72px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#172033}
.brand img{width:42px;height:42px;border-radius:14px;object-fit:cover}
.site-nav{display:flex;align-items:center;gap:6px}
.site-nav a{
    padding:10px 12px;
    border-radius:999px;
    color:#465164;
    font-size:15px;
}
.site-nav a:hover,.site-nav a.active{background:#EEF4FF;color:var(--blue)}
.nav-toggle{display:none}
.nav-toggle-label{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:14px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle-label span{width:18px;height:2px;background:#273246;border-radius:99px}
.download-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:12px 24px;
    border-radius:999px;
    background:#2980FE;
    color:#fff;
    font-weight:800;
    box-shadow:0 12px 28px rgba(41,128,254,.28);
    transition:.2s ease;
}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.section{padding:64px 0}
.section-title{max-width:760px;margin:0 0 26px}
.section-title.center{text-align:center;margin:0 auto 32px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);background:#EEF4FF;border:1px solid #DCE8FF;padding:6px 12px;border-radius:999px;font-weight:800;font-size:13px}
h1,h2,h3{line-height:1.25;margin:0 0 14px;color:#172033}
h1{font-size:clamp(34px,6vw,58px);letter-spacing:-.04em}
h2{font-size:clamp(26px,4vw,38px);letter-spacing:-.03em}
h3{font-size:20px}
p{margin:0 0 14px;color:var(--muted)}
.small{font-size:14px;color:#7C8798}
.link-arrow{color:var(--blue);font-weight:800}
.link-arrow:after{content:" →"}
.connection-workspace-hero{
    padding:34px 0 44px;
    background:var(--gradient);
    color:#fff;
    overflow:hidden;
}
.hero-grid{
    display:grid;
    gap:28px;
    align-items:center;
}
.hero-copy p{color:rgba(255,255,255,.88);font-size:17px}
.hero-copy h1{color:#fff}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin:22px 0}
.security-tags{display:flex;flex-wrap:wrap;gap:10px}
.security-tags span{
    border:1px solid rgba(255,255,255,.35);
    background:rgba(255,255,255,.13);
    color:#fff;
    border-radius:999px;
    padding:7px 12px;
    font-size:13px;
}
.hero-visual{
    position:relative;
    min-height:420px;
    display:grid;
    place-items:center;
}
.hero-device{
    width:min(420px,86%);
    border-radius:34px;
    background:rgba(255,255,255,.12);
    padding:18px;
    box-shadow:0 24px 70px rgba(11,21,70,.28);
}
.hero-device img{border-radius:26px;margin:auto}
.status-panel{
    position:absolute;
    right:0;
    bottom:20px;
    width:235px;
    background:#fff;
    color:#202C3B;
    border-radius:24px;
    padding:18px;
    box-shadow:var(--shadow);
}
.status-panel .state{display:flex;justify-content:space-between;align-items:center;font-weight:800;margin-bottom:12px}
.status-dot{width:10px;height:10px;background:#20C67A;border-radius:50%;box-shadow:0 0 0 6px rgba(32,198,122,.12)}
.status-row{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:9px 0;font-size:14px;color:#667085}
.float-card{
    position:absolute;
    left:0;
    top:30px;
    background:rgba(255,255,255,.94);
    color:#1F2A3A;
    border-radius:20px;
    padding:14px 16px;
    box-shadow:var(--shadow);
    font-weight:800;
}
.float-card span{display:block;color:var(--blue);font-size:13px}
.quick-task-entries{
    margin-top:-30px;
    position:relative;
    z-index:2;
}
.quick-task-grid{display:grid;gap:16px}
.task-card,.capability-card,.white-panel,.scenario-card,.risk-card,.faq-item,.side-card,.content-card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:0 12px 32px rgba(32,52,89,.06);
}
.task-card{padding:22px}
.task-card .tag,.capability-card .tag{
    display:inline-block;
    color:var(--blue);
    background:#EEF4FF;
    border-radius:999px;
    padding:3px 10px;
    font-size:12px;
    font-weight:800;
    margin-bottom:12px;
}
.connection-capability-overview{background:#fff}
.capability-grid{display:grid;gap:16px}
.capability-card{padding:24px}
.capability-card.featured{
    background:linear-gradient(180deg,#FFFFFF 0%,#F1F6FF 100%);
    border-color:#D8E6FF;
}
.split-section{
    display:grid;
    gap:26px;
    align-items:center;
}
.image-panel{
    background:#fff;
    border:1px solid var(--line);
    border-radius:32px;
    padding:24px;
    box-shadow:var(--shadow);
}
.bullet-list{display:grid;gap:10px;margin:18px 0;padding:0;list-style:none}
.bullet-list li{display:flex;gap:10px;color:#4B5565}
.bullet-list li:before{content:"";width:9px;height:9px;background:var(--blue);border-radius:50%;margin-top:10px;flex:0 0 auto}
.encrypted-tunnel-section{background:#F3F7FF}
.security-panel{
    display:grid;
    gap:18px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:34px;
    padding:26px;
    box-shadow:var(--shadow);
}
.mini-card-grid,.data-grid,.risk-grid,.faq-grid,.note-grid{
    display:grid;
    gap:16px;
}
.mini-card,.data-card{
    padding:18px;
    border-radius:20px;
    border:1px solid var(--line);
    background:#FBFCFF;
}
.route-optimization-section .route-board{
    background:linear-gradient(180deg,#FFFFFF,#F6F9FF);
    border:1px solid var(--line);
    border-radius:34px;
    padding:24px;
}
.route-status{display:grid;gap:12px;margin-top:18px}
.route-status div{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px 14px;color:#667085}
.route-status strong{color:#172033}
.device-strip{
    display:grid;
    gap:16px;
}
.device-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
    padding:18px;
}
.data-boundary-section{background:#fff}
.usage-scenarios-section{background:#F7F9FD}
.scenario-card{padding:22px}
.connection-checkup-section{background:#fff}
.checkup-steps{counter-reset:step;display:grid;gap:14px}
.checkup-steps .step{
    position:relative;
    padding:18px 18px 18px 58px;
    background:#F8FAFE;
    border:1px solid var(--line);
    border-radius:20px;
}
.checkup-steps .step:before{
    counter-increment:step;
    content:counter(step);
    position:absolute;
    left:18px;
    top:18px;
    width:28px;
    height:28px;
    display:grid;
    place-items:center;
    border-radius:50%;
    background:var(--blue);
    color:#fff;
    font-weight:800;
}
.process-steps{
    display:grid;
    gap:16px;
}
.process-step{
    background:#fff;
    border:1px solid var(--line);
    border-radius:22px;
    padding:20px;
    position:relative;
}
.process-step .num{
    display:inline-grid;
    place-items:center;
    width:34px;
    height:34px;
    border-radius:12px;
    background:#EEF4FF;
    color:var(--blue);
    font-weight:900;
    margin-bottom:12px;
}
.risk-card{padding:20px;border-left:4px solid var(--blue)}
.faq-item{padding:20px}
.faq-item summary{cursor:pointer;font-weight:800;color:#172033}
.faq-item p{margin-top:10px}
.cta-section{
    background:var(--gradient);
    color:#fff;
    text-align:center;
    padding:64px 0;
}
.cta-section h2,.cta-section p{color:#fff}
.cta-section p{opacity:.88;max-width:680px;margin:0 auto 22px}
.page-hero{
    padding:52px 0;
    background:linear-gradient(180deg,#FFFFFF 0%,#F1F6FF 100%);
    border-bottom:1px solid var(--line);
}
.page-hero .summary{max-width:780px;font-size:17px}
.detail-layout{
    display:grid;
    gap:24px;
    align-items:start;
}
.detail-content{background:#fff;border:1px solid var(--line);border-radius:30px;padding:26px;box-shadow:var(--shadow)}
.detail-content h2{font-size:26px;margin-top:22px}
.detail-content h2:first-child{margin-top:0}
.side-card{padding:22px}
.side-card + .side-card{margin-top:16px}
.check-list{padding:0;margin:16px 0 0;list-style:none;display:grid;gap:10px}
.check-list li{padding-left:28px;position:relative;color:#4B5565}
.check-list li:before{content:"✓";position:absolute;left:0;top:0;color:var(--blue);font-weight:900}
.notice-box{
    margin:22px 0;
    background:#F4F8FF;
    border:1px solid #DCE8FF;
    border-radius:22px;
    padding:18px;
}
.download-page-panel{
    background:#fff;
    border:1px solid var(--line);
    border-radius:34px;
    padding:28px;
    box-shadow:var(--shadow);
}
.install-steps{
    display:grid;
    gap:14px;
    margin:24px 0;
}
.install-step{
    display:flex;
    gap:14px;
    align-items:flex-start;
    background:#F8FAFE;
    border:1px solid var(--line);
    border-radius:18px;
    padding:16px;
}
.install-step span{
    width:32px;
    height:32px;
    border-radius:12px;
    background:#EEF4FF;
    color:var(--blue);
    display:grid;
    place-items:center;
    font-weight:900;
    flex:0 0 auto;
}
.about-values{display:grid;gap:16px}
.site-footer{
    background:#101B2C;
    color:#D7DEE9;
    padding:48px 0 20px;
}
.footer-grid{display:grid;gap:24px}
.footer-brand{font-size:22px;font-weight:900;color:#fff;margin-bottom:8px}
.site-footer p{color:#B8C2D1}
.site-footer h3{color:#fff;font-size:17px}
.site-footer a{display:block;color:#B8C2D1;margin:8px 0}
.site-footer a:hover{color:#fff}
.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);margin-top:32px;padding-top:18px;color:#AAB5C5;font-size:14px}
@media (max-width:760px){
    .nav-toggle-label{display:flex}
    .site-nav{
        position:absolute;
        left:14px;
        right:14px;
        top:72px;
        display:none;
        flex-direction:column;
        align-items:stretch;
        background:#fff;
        border:1px solid var(--line);
        border-radius:22px;
        padding:12px;
        box-shadow:var(--shadow);
    }
    .nav-toggle:checked ~ .site-nav{display:flex}
    .site-nav a{padding:12px 14px}
    .hero-visual{min-height:360px}
    .status-panel{right:4px;bottom:4px;width:210px}
    .float-card{left:8px;top:10px}
    .section{padding:48px 0}
}
@media (min-width:640px){
    .quick-task-grid,.mini-card-grid,.data-grid,.faq-grid,.note-grid,.about-values{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
    .risk-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
    .hero-grid{grid-template-columns:1.02fr .98fr}
    .quick-task-grid{grid-template-columns:repeat(4,1fr)}
    .capability-grid{grid-template-columns:repeat(4,1fr);grid-auto-flow:dense}
    .capability-card.featured{grid-column:span 2}
    .split-section{grid-template-columns:1fr 1fr}
    .security-panel{grid-template-columns:1.15fr .85fr}
    .device-strip{grid-template-columns:repeat(3,1fr)}
    .data-grid{grid-template-columns:repeat(3,1fr)}
    .risk-grid{grid-template-columns:repeat(3,1fr)}
    .process-steps{grid-template-columns:repeat(3,1fr)}
    .detail-layout{grid-template-columns:minmax(0,1fr) 320px}
    .footer-grid{grid-template-columns:1.5fr .7fr .7fr}
}