:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --light:#f5f7fb;
    --line:#e6eaf2;
    --card:#ffffff;
    --soft:#eef5ff;
    --radius:24px;
    --shadow:0 18px 45px rgba(28, 45, 88, .10);
}
*{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:#fff;line-height:1.7;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(16px);border-bottom:1px solid rgba(230,234,242,.9)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#172033;white-space:nowrap}
.logo img{width:38px;height:38px;border-radius:12px;object-fit:cover;box-shadow:0 8px 24px rgba(41,128,254,.18)}
.site-nav{display:none;align-items:center;gap:6px;flex-wrap:wrap}
.site-nav a{font-size:14px;color:#465063;padding:10px 12px;border-radius:999px;transition:.2s}
.site-nav a:hover,.site-nav a.active{background:#edf4ff;color:var(--blue)}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.mobile-nav-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}
.mobile-nav-label span{width:18px;height:2px;background:#263247;border-radius:2px}
.nav-toggle:checked ~ .site-nav{display:grid;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:12px;grid-template-columns:1fr 1fr;z-index:60}
.section{padding:64px 0}
.section-soft{background:#f7f9fd}
.section-title{max-width:760px;margin:0 auto 28px;text-align:center}
.section-title .eyebrow,.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#edf4ff;color:var(--blue);font-weight:700;font-size:13px;margin-bottom:10px}
h1,h2,h3{line-height:1.25;margin:0;color:#172033}
h1{font-size:clamp(34px, 7vw, 58px);letter-spacing:-.04em}
h2{font-size:clamp(28px, 5vw, 42px);letter-spacing:-.03em}
h3{font-size:20px}
p{margin:0;color:var(--muted)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:#2980FE;color:#fff;font-weight:800;box-shadow:0 14px 30px rgba(41,128,254,.25);transition:.2s}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.link-arrow{display:inline-flex;align-items:center;margin-top:16px;color:var(--blue);font-weight:800}
.link-arrow::after{content:"→";margin-left:6px}
.connection-workspace-hero{background:var(--gradient);padding:54px 0 44px;color:#fff;position:relative;overflow:hidden}
.connection-workspace-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 10%, rgba(255,255,255,.28), transparent 28%),radial-gradient(circle at 90% 20%, rgba(255,255,255,.18), transparent 32%)}
.hero-grid{position:relative;display:grid;gap:28px;align-items:center}
.hero-copy h1,.hero-copy p{color:#fff}
.hero-copy p{font-size:17px;margin:18px 0 24px;max-width:620px;color:rgba(255,255,255,.88)}
.security-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.security-tags span{border:1px solid rgba(255,255,255,.32);background:rgba(255,255,255,.16);padding:7px 12px;border-radius:999px;font-size:13px;color:#fff}
.hero-visual{position:relative;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);border-radius:34px;padding:18px;box-shadow:0 28px 70px rgba(0,0,0,.16)}
.hero-visual img{border-radius:28px;margin:auto;max-height:430px;object-fit:contain}
.status-panel{background:#fff;border-radius:24px;padding:18px;box-shadow:var(--shadow);color:#172033;border:1px solid rgba(230,234,242,.75)}
.hero-visual .status-panel{position:relative;margin-top:14px}
.status-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line);gap:10px}
.status-row:last-child{border-bottom:none}
.status-dot{width:10px;height:10px;border-radius:50%;background:#25c26e;box-shadow:0 0 0 6px rgba(37,194,110,.12)}
.status-label{color:var(--muted);font-size:13px}.status-value{font-weight:800;color:#172033}
.quick-task-entries{display:grid;gap:16px;margin-top:-22px;position:relative;z-index:3}
.quick-task-card,.task-card,.capability-card,.info-card,.risk-card,.faq-item,.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 10px 28px rgba(28,45,88,.06)}
.quick-task-card .tag,.capability-card .tag,.task-card .tag{display:inline-flex;color:var(--blue);background:#edf4ff;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:800;margin-bottom:10px}
.quick-task-card p,.capability-card p,.task-card p,.info-card p,.risk-card p{margin-top:8px}
.connection-capability-overview{display:grid;gap:16px}
.capability-card.featured{background:linear-gradient(180deg,#fff,#f6f9ff);min-height:220px}
.feature-split{display:grid;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.feature-split.reverse .feature-image{order:-1}
.feature-image{background:#f0f5ff;border-radius:28px;padding:18px;min-height:260px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.feature-image img{max-height:360px;object-fit:contain;border-radius:22px}
.feature-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
.feature-list li{display:flex;gap:10px;align-items:flex-start;color:#445066}
.feature-list li::before{content:"";width:8px;height:8px;background:var(--blue);border-radius:50%;margin-top:10px;flex:0 0 8px}
.encrypted-tunnel-section .security-panel{display:grid;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.security-cards{display:grid;gap:14px;margin-top:18px}
.route-panel{display:grid;gap:18px;align-items:center;background:#f7fbff;border:1px solid #dfeaff;border-radius:32px;padding:24px}
.route-status{display:grid;gap:12px}
.route-line{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px}
.progress{height:8px;border-radius:999px;background:#e8eef8;overflow:hidden;margin-top:10px}.progress span{display:block;height:100%;background:#2980FE;border-radius:999px}
.device-grid,.data-grid,.scenario-grid,.risk-grid,.faq-grid,.article-card-grid{display:grid;gap:16px}
.device-showcase{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow);display:grid;gap:18px;align-items:center}
.data-boundary-section .data-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.process-steps{display:grid;gap:16px;counter-reset:step}
.step-card{position:relative;padding-left:72px;min-height:128px}
.step-card::before{counter-increment:step;content:counter(step);position:absolute;left:22px;top:22px;width:36px;height:36px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}
.risk-card{border-top:4px solid var(--blue)}
.faq-item h3{font-size:18px;margin-bottom:8px}.faq-list{display:grid;gap:14px;max-width:920px;margin:0 auto}.faq-list .faq-item{box-shadow:none}
.cta-section{padding:58px 0;background:var(--gradient);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-section h2,.cta-section p{color:#fff}.cta-section p{max-width:680px;margin:14px auto 24px;color:rgba(255,255,255,.88)}
.page-hero{padding:58px 0 34px;background:linear-gradient(180deg,#f5f8ff 0%,#fff 100%)}
.page-hero .container{max-width:920px}.page-hero h1{margin:6px 0 14px}.page-hero p{font-size:17px}
.content-container{width:min(980px, calc(100% - 32px));margin:0 auto}
.article-layout{display:grid;gap:20px;align-items:start}.article-main{display:grid;gap:18px}.article-main section,.side-panel,.download-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:0 10px 28px rgba(28,45,88,.05)}
.article-main h2{font-size:26px;margin-bottom:10px}.article-main p + p{margin-top:12px}.article-main ul,.article-main ol{margin:12px 0 0;padding-left:20px;color:#526070}.article-main li{margin:8px 0}.side-panel{position:relative}.side-panel h3,.download-panel h3{margin-bottom:10px}.side-panel a{display:block;color:var(--blue);font-weight:800;margin-top:10px}.notice{border-left:4px solid var(--blue);background:#f4f8ff;padding:16px;border-radius:18px;color:#526070;margin-top:14px}.download-panel{text-align:center}.download-panel p{margin:8px 0 16px}.download-page-grid{display:grid;gap:18px}.download-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}.download-card.center{text-align:center}.install-steps{display:grid;gap:12px;counter-reset:install}.install-steps li{list-style:none;background:#f7f9fd;border:1px solid var(--line);border-radius:18px;padding:14px 16px 14px 54px;position:relative;color:#4b5565}.install-steps li::before{counter-increment:install;content:counter(install);position:absolute;left:16px;top:14px;width:26px;height:26px;border-radius:9px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}.site-footer{background:#172033;color:#cbd5e1;padding:48px 0 18px}.footer-grid{display:grid;gap:24px}.footer-brand{font-size:22px;font-weight:900;color:#fff;margin-bottom:10px}.site-footer h3{font-size:16px;color:#fff;margin-bottom:10px}.site-footer a{display:block;color:#cbd5e1;margin:8px 0}.site-footer p{color:#cbd5e1}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;font-size:13px;color:#94a3b8}.simple-list{display:grid;gap:12px}.simple-list div{background:#f7f9fd;border:1px solid var(--line);border-radius:18px;padding:14px}.image-band{background:#edf4ff;border-radius:28px;padding:18px;display:flex;align-items:center;justify-content:center}.image-band img{max-height:320px;object-fit:contain}
@media (min-width:640px){
    .quick-task-entries,.security-cards,.device-grid,.data-grid,.scenario-grid,.risk-grid,.faq-grid,.article-card-grid,.download-page-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
    .mobile-nav-label{display:none}.site-nav{display:flex}.header-inner{min-height:78px}
    .hero-grid{grid-template-columns:1.05fr .95fr}.hero-visual .status-panel{position:absolute;right:-14px;bottom:22px;width:280px;margin-top:0}
    .quick-task-entries{grid-template-columns:repeat(4,1fr)}
    .connection-capability-overview{grid-template-columns:1.2fr 1fr 1fr}.capability-card.featured{grid-row:span 2}
    .feature-split,.route-panel,.device-showcase,.encrypted-tunnel-section .security-panel{grid-template-columns:1fr 1fr;padding:34px}
    .feature-split.reverse .feature-image{order:2}
    .data-grid,.scenario-grid{grid-template-columns:repeat(3,1fr)}
    .risk-grid{grid-template-columns:repeat(4,1fr)}
    .process-steps{grid-template-columns:repeat(3,1fr)}
    .article-layout{grid-template-columns:minmax(0,1fr) 300px}.side-column{display:grid;gap:18px;position:sticky;top:100px}
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}
}
@media (min-width:1120px){.section{padding:86px 0}.connection-workspace-hero{padding:76px 0 72px}}
@media (max-width:480px){.container,.content-container{width:calc(100% - 24px)}.quick-task-card,.task-card,.capability-card,.info-card,.risk-card,.faq-item,.step-card,.article-main section,.side-panel,.download-panel,.download-card{padding:18px}.download-btn{width:100%;min-height:52px}.page-hero{padding-top:42px}.section{padding:48px 0}.hero-visual{border-radius:26px;padding:12px}.hero-visual img{border-radius:22px}.status-row{align-items:flex-start;flex-direction:column}.nav-toggle:checked ~ .site-nav{grid-template-columns:1fr}.feature-split,.route-panel,.device-showcase,.encrypted-tunnel-section .security-panel{padding:18px;border-radius:26px}.step-card{padding-left:64px}}