:root{
    --gradient:linear-gradient(90deg,#3558F2 0%,#7B4EF1 50%,#B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#253047;
    --muted:#687287;
    --light:#F5F7FB;
    --line:#E5EAF3;
    --card:#FFFFFF;
    --soft-blue:#EEF5FF;
    --radius:26px;
    --shadow:0 18px 45px rgba(34,57,110,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;background:#fff;color:var(--text);line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav-wrap{max-width:1180px;margin:0 auto;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand,.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:#17233F;font-size:20px}
.brand img,.footer-brand img{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;gap:6px;align-items:center;flex-wrap:wrap}
.site-nav a{font-size:14px;color:#4D5B72;padding:9px 12px;border-radius:999px}
.site-nav a:hover,.site-nav a.active{background:var(--soft-blue);color:var(--blue)}
.nav-toggle{width:44px;height:40px;border:1px solid var(--line);border-radius:14px;background:#fff;display:grid;place-content:center;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:#1D2A44;border-radius:2px}
.site-nav.open{display:flex;position:absolute;top:69px;left:14px;right:14px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
.site-nav.open a{display:block}
.container{max-width:1180px;margin:0 auto;padding:0 18px}
.section{padding:58px 0}
.section-soft{background:var(--light)}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;color:var(--blue);background:var(--soft-blue);font-weight:800;font-size:13px;border-radius:999px;padding:7px 12px;margin-bottom:14px}
h1,h2,h3{line-height:1.22;color:#16223A;margin:0 0 14px}
h1{font-size:34px;letter-spacing:-.02em}
h2{font-size:27px}h3{font-size:19px}p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:17px;color:#53627A}.small{font-size:14px;color:#738096}.center{text-align:center}.narrow{max-width:840px;margin:0 auto}.mt{margin-top:24px}
.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)}
.link{color:var(--blue);font-weight:800}.link:hover{color:var(--blue-dark)}
.connection-workspace-hero{background:var(--gradient);margin:18px;border-radius:32px;color:#fff;overflow:hidden;position:relative}
.connection-workspace-hero:before{content:"";position:absolute;width:360px;height:360px;border-radius:50%;right:-130px;top:-130px;background:rgba(255,255,255,.18);filter:blur(2px)}
.hero-grid{position:relative;max-width:1180px;margin:0 auto;padding:58px 18px;display:grid;gap:34px;align-items:center}
.hero-copy h1,.hero-copy p{color:#fff}.hero-copy h1{font-size:40px}.hero-copy .lead{color:rgba(255,255,255,.88)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:7px 12px;font-size:13px;font-weight:700}
.hero-visual{position:relative;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);border-radius:32px;padding:18px;box-shadow:0 26px 60px rgba(13,20,60,.22)}
.hero-visual img{border-radius:24px;margin:0 auto;max-height:390px;object-fit:contain}
.status-panel{background:#fff;color:var(--text);border-radius:24px;padding:16px;border:1px solid rgba(255,255,255,.55);box-shadow:var(--shadow)}
.hero-visual .status-panel{margin-top:14px}.status-row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:9px 0;font-size:14px}.status-row:last-child{border-bottom:0}.status-row strong{color:#15213B}.status-row span{color:var(--blue);font-weight:800}
.quick-task-entries,.risk-grid,.scenario-grid,.faq-grid,.info-grid{display:grid;grid-template-columns:1fr;gap:16px}
.quick-card,.task-card,.capability-card,.info-card,.risk-card,.faq-item,.step-card,.page-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 32px rgba(26,48,91,.07)}
.quick-card .tag,.capability-card .tag,.task-card .tag{display:inline-flex;color:var(--blue);font-weight:800;font-size:12px;margin-bottom:8px;background:var(--soft-blue);border-radius:999px;padding:4px 9px}
.connection-capability-overview{display:grid;grid-template-columns:1fr;gap:16px}.capability-card.featured{background:linear-gradient(180deg,#fff 0%,#F2F7FF 100%)}
.split{display:grid;grid-template-columns:1fr;gap:26px;align-items:center}.split .media-card{background:var(--light);border:1px solid var(--line);border-radius:32px;padding:22px;box-shadow:var(--shadow)}.media-card img{border-radius:24px;margin:auto;max-height:360px;object-fit:contain}
.feature-list{display:grid;gap:10px;margin:18px 0}.feature-list div,.check-list li{padding:12px 14px;background:var(--light);border:1px solid var(--line);border-radius:18px;color:#43516A}.check-list{padding-left:0;list-style:none;display:grid;gap:10px;margin:18px 0}
.encrypted-tunnel-section .security-panel,.route-optimization-section .route-panel,.device-protection-section .device-panel,.data-boundary-section .boundary-panel,.connection-checkup-section .check-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}
.security-chips{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.security-chips span{background:#F4F8FF;border:1px solid #DDE8FA;border-radius:999px;color:#2A5BCB;font-weight:800;padding:8px 12px;font-size:13px}
.process-steps{display:grid;grid-template-columns:1fr;gap:16px;counter-reset:step}.step-card{position:relative;padding-left:72px}.step-card .num{position:absolute;left:22px;top:22px;width:36px;height:36px;border-radius:12px;background:var(--gradient);color:#fff;display:grid;place-items:center;font-weight:900}
.risk-card{border-left:4px solid var(--blue)}.risk-card strong{display:block;color:#17233F;margin-bottom:6px}.risk-card em{font-style:normal;color:var(--blue);font-weight:800}
.cta-section{margin:40px 18px 18px;background:var(--gradient);border-radius:32px;color:#fff;text-align:center;padding:48px 18px}.cta-section h2,.cta-section p{color:#fff}.cta-section p{color:rgba(255,255,255,.88)}
.page-hero{background:linear-gradient(180deg,#F5F8FF 0%,#fff 100%);padding:54px 0;border-bottom:1px solid var(--line)}
.page-layout{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}.side-panel{background:#F7FAFF;border:1px solid var(--line);border-radius:26px;padding:20px;position:sticky;top:96px}.side-panel a{display:block;color:var(--blue);font-weight:800;padding:8px 0}
.article-body{background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:0 12px 32px rgba(26,48,91,.06)}
.note-box{background:#F3F7FF;border:1px solid #DDE8FA;border-radius:22px;padding:18px;margin:18px 0}.download-only{margin-top:22px}.download-steps{display:grid;grid-template-columns:1fr;gap:14px}.download-step{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.download-step strong{color:#17233F}
.site-footer{background:#121A2C;color:#DDE5F4;margin-top:40px}.footer-inner{max-width:1180px;margin:0 auto;padding:38px 18px;display:grid;gap:22px}.footer-inner p{color:#AAB6C9}.footer-brand{color:#fff}.footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.footer-links a{color:#DDE5F4}.footer-links a:hover{color:#fff}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding:16px 18px;color:#AAB6C9;font-size:14px}
@media (min-width:700px){
    h1{font-size:42px}h2{font-size:32px}.quick-task-entries,.info-grid,.risk-grid,.faq-grid,.download-steps{grid-template-columns:repeat(2,1fr)}.connection-capability-overview{grid-template-columns:repeat(2,1fr)}.scenario-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.footer-inner{grid-template-columns:1.2fr 1fr}.footer-links{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:980px){
    .nav-toggle{display:none}.site-nav{display:flex}.hero-grid{grid-template-columns:1.05fr .95fr;padding:78px 18px}.hero-copy h1{font-size:56px}.quick-task-entries{grid-template-columns:repeat(4,1fr);margin-top:-46px;position:relative;z-index:2}.connection-capability-overview{grid-template-columns:1.2fr 1fr 1fr}.capability-card.featured{grid-row:span 2}.split{grid-template-columns:1fr 1fr}.page-layout{grid-template-columns:minmax(0,1fr) 310px}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.section{padding:76px 0}.article-body{padding:34px}
}
@media (max-width:420px){
    .connection-workspace-hero,.cta-section{margin-left:10px;margin-right:10px;border-radius:24px}.hero-grid{padding:42px 16px}.hero-copy h1{font-size:34px}.download-btn{width:100%;padding:0 18px}.quick-card,.task-card,.capability-card,.info-card,.risk-card,.faq-item,.step-card,.page-card,.article-body{border-radius:22px;padding:18px}.step-card{padding-left:66px}
}