*{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:#263142;background:#f6f8fc;line-height:1.7}
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 #e8edf5}
.header-inner{width:min(1180px,calc(100% - 28px));height:70px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#182236}
.logo img,.footer-logo img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;position:absolute;left:14px;right:14px;top:70px;background:#fff;border:1px solid #e4eaf3;border-radius:22px;padding:14px;box-shadow:0 18px 42px rgba(38,49,66,.12)}
.site-nav a{display:block;padding:11px 12px;border-radius:14px;color:#4b5870;font-size:15px}
.site-nav a:hover{background:#eef5ff;color:#2980FE}
.nav-toggle{display:none}
.nav-toggle:checked~.site-nav{display:block}
.nav-toggle-label{width:44px;height:44px;border:1px solid #dde5f0;border-radius:14px;display:grid;place-items:center}
.nav-toggle-label span,.nav-toggle-label span:before,.nav-toggle-label span:after{content:"";display:block;width:20px;height:2px;background:#263142;border-radius:2px}
.nav-toggle-label span:before{transform:translateY(-7px)}
.nav-toggle-label span:after{transform:translateY(5px)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;border-radius:999px;background:#2980FE;color:#fff!important;font-weight:800;box-shadow:0 14px 28px rgba(41,128,254,.28);transition:.2s ease}
.download-btn:hover{background:#1768E8;transform:translateY(-1px)}
.section{padding:68px 0}
.section-muted{background:#eef4fb}
.section-title{margin:0 0 12px;font-size:30px;line-height:1.25;color:#172033}
.section-lead{margin:0 0 28px;color:#66758b;max-width:760px}
.badge{display:inline-flex;align-items:center;margin-bottom:14px;padding:6px 12px;border-radius:999px;background:#eaf3ff;color:#2980FE;font-size:13px;font-weight:800}
.eyebrow{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eaf3ff;color:#2980FE;font-size:12px;font-weight:800}
.connection-workspace-hero{background:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);padding:54px 0 46px;color:#fff;overflow:hidden}
.hero-grid{display:grid;gap:28px;align-items:center}
.hero-copy h1{margin:0 0 16px;font-size:40px;line-height:1.12;letter-spacing:-.03em}
.hero-copy p{margin:0 0 22px;color:rgba(255,255,255,.88);font-size:17px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.hero-tags span{border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.14);padding:7px 11px;border-radius:999px;font-size:13px}
.hero-visual{position:relative;min-height:360px;border-radius:34px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.22);padding:22px;box-shadow:inset 0 1px 0 rgba(255,255,255,.26)}
.hero-visual img{margin:auto;max-height:330px;object-fit:contain;filter:drop-shadow(0 22px 34px rgba(23,32,51,.2))}
.status-panel{background:#fff;color:#263142;border:1px solid #e6edf6;border-radius:24px;padding:18px;box-shadow:0 20px 44px rgba(23,32,51,.16)}
.hero-visual .status-panel{position:absolute;left:14px;bottom:18px;width:min(270px,calc(100% - 28px))}
.status-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid #eef2f7}
.status-row:last-child{border-bottom:0}
.status-dot{width:10px;height:10px;border-radius:50%;background:#29c27f;box-shadow:0 0 0 6px rgba(41,194,127,.12)}
.quick-task-entries{display:grid;grid-template-columns:1fr;gap:16px;margin-top:-28px;position:relative;z-index:3}
.task-card,.capability-card,.content-card,.faq-item,.risk-card,.step-card,.scenario-card{background:#fff;border:1px solid #e3eaf4;border-radius:24px;padding:22px;box-shadow:0 16px 36px rgba(31,45,68,.06)}
.task-card h3,.capability-card h3,.content-card h3,.risk-card h3,.step-card h3,.scenario-card h3{margin:0 0 8px;color:#182236}
.task-card p,.capability-card p,.content-card p,.risk-card p,.step-card p,.scenario-card p{margin:0;color:#64748b}
.text-link{display:inline-flex;margin-top:14px;color:#2980FE;font-weight:800}
.connection-capability-overview{display:grid;grid-template-columns:1fr;gap:16px}
.capability-card.featured{background:linear-gradient(135deg,#fff,#eef5ff);border-color:#cfe0ff}
.split-panel{display:grid;gap:26px;align-items:center;background:#fff;border:1px solid #e2e9f3;border-radius:32px;padding:24px;box-shadow:0 18px 44px rgba(31,45,68,.07)}
.split-panel img{border-radius:26px;max-height:390px;margin:auto;object-fit:contain}
.feature-list,.check-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
.feature-list li,.check-list li{padding:12px 14px;border-radius:16px;background:#f5f8fc;color:#4b5870;border:1px solid #e7edf5}
.encrypted-tunnel-section .security-grid,.data-boundary-section .info-grid,.usage-scenarios-section .scenario-grid,.risk-grid,.process-steps,.card-grid{display:grid;grid-template-columns:1fr;gap:16px}
.security-panel{background:#fff;border:1px solid #e2e9f3;border-radius:32px;padding:26px}
.security-panel img{max-height:260px;margin:12px auto 0}
.route-board{display:grid;gap:18px}
.route-status{background:#fff;border-radius:28px;border:1px solid #e2e9f3;padding:22px}
.route-line{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid #eef2f7}
.route-line:last-child{border-bottom:0}
.device-stack{display:grid;gap:16px}
.device-card{background:#fff;border:1px solid #e2e9f3;border-radius:28px;padding:22px}
.notice-panel{border-left:4px solid #2980FE;background:#fff;border-radius:22px;padding:20px;border-top:1px solid #e2e9f3;border-right:1px solid #e2e9f3;border-bottom:1px solid #e2e9f3}
.process-steps{counter-reset:step}
.step-card{position:relative;padding-top:52px}
.step-card:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:18px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#2980FE;color:#fff;font-weight:800}
.risk-card{border-left:4px solid #2980FE}
.faq-list{display:grid;gap:14px}
.faq-item h3{margin:0 0 8px;color:#182236}
.faq-item p{margin:0;color:#64748b}
.cta-section{padding:60px 0;background:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);color:#fff;text-align:center}
.cta-box{width:min(840px,calc(100% - 32px));margin:0 auto}
.cta-box h2{font-size:30px;margin:0 0 12px}
.cta-box p{margin:0 auto 22px;max-width:650px;color:rgba(255,255,255,.86)}
.page-hero{padding:58px 0 24px;background:linear-gradient(180deg,#f5f8ff 0%,#f6f8fc 100%)}
.page-hero h1{margin:0 0 12px;font-size:36px;line-height:1.2;color:#172033}
.page-hero p{max-width:760px;margin:0;color:#64748b}
.article-layout{display:grid;gap:22px;align-items:start}
.article-main,.article-side{background:#fff;border:1px solid #e2e9f3;border-radius:30px;padding:24px}
.article-main h2{margin-top:6px;color:#172033}
.article-main p{color:#4d5a70}
.article-side{position:sticky;top:92px}
.mini-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.mini-list li{padding:12px;border-radius:16px;background:#f5f8fc;color:#59677d}
.download-panel{background:#fff;border:1px solid #e2e9f3;border-radius:30px;padding:28px;text-align:center}
.download-steps{display:grid;gap:14px;margin-top:24px}
.download-steps .step-card{text-align:left}
.site-footer{background:#172033;color:#d8e1f0;padding-top:44px}
.footer-grid{display:grid;gap:28px}
.site-footer p{color:#aeb9cc}
.site-footer h3{margin:0 0 12px;color:#fff}
.site-footer a{display:block;color:#c9d4e6;margin:8px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding:18px;text-align:center;color:#aeb9cc;font-size:14px}
.footer-logo img{width:34px;height:34px}
.legal-note{font-size:14px;color:#66758b;background:#f5f8fc;border:1px solid #e2e9f3;border-radius:18px;padding:14px;margin-top:18px}
@media(min-width:680px){.quick-task-entries,.security-grid,.info-grid,.scenario-grid,.risk-grid,.card-grid,.download-steps{grid-template-columns:repeat(2,1fr)}.connection-capability-overview{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.hero-copy h1{font-size:48px}}
@media(min-width:960px){.nav-toggle-label{display:none}.site-nav{position:static;display:flex!important;align-items:center;gap:2px;background:transparent;border:0;box-shadow:none;padding:0}.site-nav a{padding:8px 10px;font-size:14px}.hero-grid{grid-template-columns:1.02fr .98fr}.connection-workspace-hero{padding:82px 0 64px}.hero-copy h1{font-size:58px}.quick-task-entries{grid-template-columns:repeat(4,1fr)}.connection-capability-overview{grid-template-columns:repeat(4,1fr);grid-auto-rows:1fr}.capability-card.featured{grid-column:span 2}.split-panel{grid-template-columns:1fr 1fr;padding:34px}.route-board{grid-template-columns:1.2fr .8fr}.device-stack{grid-template-columns:1fr 1fr 1fr}.usage-scenarios-section .scenario-grid,.risk-grid{grid-template-columns:repeat(3,1fr)}.data-boundary-section .info-grid{grid-template-columns:repeat(3,1fr)}.encrypted-tunnel-section .security-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.article-layout{grid-template-columns:minmax(0,1fr) 320px}.footer-grid{grid-template-columns:1.6fr 1fr 1fr}.section-title{font-size:38px}.page-hero h1{font-size:44px}}
@media(max-width:420px){.container{width:min(100% - 24px,1120px)}.hero-copy h1{font-size:34px}.section{padding:52px 0}.task-card,.capability-card,.content-card,.faq-item,.risk-card,.step-card,.scenario-card,.article-main,.article-side{padding:18px;border-radius:22px}.download-btn{width:100%;padding-left:18px;padding-right:18px}.hero-visual{min-height:300px}.hero-visual .status-panel{position:static;margin-top:14px;width:100%}}