:root{
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue:#2980FE;
    --blue-dark:#1768E8;
    --text:#1f2937;
    --muted:#667085;
    --light:#f6f8fc;
    --line:#e7ecf5;
    --card:#ffffff;
    --shadow:0 18px 45px rgba(31, 41, 55, .08);
    --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:#fff;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{max-width:1180px;margin:0 auto;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#172033}
.logo{width:38px;height:38px;border-radius:12px;object-fit:cover}
.site-nav{display:none;gap:18px;align-items:center;font-size:14px;color:#344054}
.site-nav a{padding:8px 0;border-bottom:2px solid transparent}
.site-nav a:hover{color:var(--blue);border-bottom-color:var(--blue)}
.nav-check{display:none}.nav-toggle{padding:8px 14px;border:1px solid var(--line);border-radius:999px;color:var(--blue);font-weight:700;background:#f8fbff}
.nav-check:checked~.site-nav{display:grid;grid-template-columns:1fr;position:absolute;left:18px;right:18px;top:68px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:14px 18px;box-shadow:var(--shadow)}
.container,.section-inner{max-width:1180px;margin:0 auto;padding:0 18px}
.section{padding:58px 0}.section-soft{background:var(--light)}
.section-title{font-size:30px;line-height:1.25;margin:0 0 14px;color:#101828}.section-lead{color:var(--muted);max-width:760px;margin:0 0 28px}
.connection-workspace-hero{background:var(--gradient);padding:48px 18px 34px;color:#fff;border-bottom-left-radius:34px;border-bottom-right-radius:34px;position:relative;overflow:hidden}
.connection-workspace-hero:after{content:"";position:absolute;right:-80px;top:-120px;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.18)}
.hero-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1fr;gap:30px;align-items:center;position:relative;z-index:2}
.hero-copy h1{font-size:38px;line-height:1.16;margin:0 0 16px;letter-spacing:-.5px}.hero-copy p{font-size:16px;margin:0 0 22px;color:rgba(255,255,255,.88)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;border-radius:999px;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 12px 30px rgba(41,128,254,.25);transition:.2s ease}.download-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.hero-tags,.inline-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.hero-tags span,.inline-tags span{display:inline-flex;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);font-size:13px}.inline-tags span{background:#eef5ff;border-color:#d8e8ff;color:#1b5eca}
.hero-visual{position:relative}.hero-device{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);padding:18px;border-radius:32px;box-shadow:0 24px 80px rgba(17,24,39,.18)}
.hero-device img{border-radius:24px;margin:auto}.status-panel{background:#fff;color:#182230;border-radius:24px;box-shadow:var(--shadow);padding:18px;border:1px solid rgba(255,255,255,.55)}
.hero-visual .status-panel{margin-top:16px}.status-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}.status-row:last-child{border-bottom:0}.status-dot{width:10px;height:10px;border-radius:50%;background:#17b26a;display:inline-block;margin-right:8px}
.quick-task-entries{display:grid;grid-template-columns:1fr;gap:16px;margin-top:-12px;position:relative;z-index:3}.quick-task-card,.task-card,.capability-card,.content-card,.risk-card,.faq-item,.step-card,.note-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.task-label,.category-badge{display:inline-flex;align-items:center;width:max-content;padding:5px 10px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:13px;font-weight:800;margin-bottom:10px}.quick-task-card h3,.task-card h3,.capability-card h3,.content-card h3,.risk-card h3,.step-card h3{margin:0 0 8px;font-size:20px}.quick-task-card p,.task-card p,.capability-card p,.content-card p,.risk-card p,.step-card p{margin:0;color:var(--muted)}.text-link{display:inline-flex;margin-top:14px;color:var(--blue);font-weight:800}.text-link:hover{color:var(--blue-dark)}
.connection-capability-overview{display:grid;grid-template-columns:1fr;gap:18px}.capability-card.featured{background:linear-gradient(180deg,#fff 0%,#f5f8ff 100%)}
.split-section{display:grid;grid-template-columns:1fr;gap:24px;align-items:center}.split-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:26px;box-shadow:var(--shadow)}.split-panel img{border-radius:24px;margin:auto}.feature-list{display:grid;gap:12px;margin:18px 0}.feature-list div{padding:13px 14px;border-radius:16px;background:#f7f9fd;border:1px solid var(--line);color:#344054}
.quick-connect-section,.encrypted-tunnel-section,.route-optimization-section,.device-protection-section,.data-boundary-section,.usage-scenarios-section,.connection-checkup-section{position:relative}
.security-grid,.data-grid,.usage-grid,.risk-grid,.info-grid{display:grid;grid-template-columns:1fr;gap:16px}.security-panel{background:#fff;border:1px solid var(--line);border-radius:32px;padding:24px;box-shadow:var(--shadow)}.security-panel img{border-radius:24px;margin:18px auto 0}
.route-status{display:grid;gap:12px;margin-top:14px}.route-line{display:flex;justify-content:space-between;gap:12px;padding:12px 14px;background:#f7f9fd;border:1px solid var(--line);border-radius:16px;color:#344054}
.device-stack{display:grid;gap:14px}.device-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow)}.device-card img{border-radius:18px;margin:0 auto 12px}
.process-steps{display:grid;grid-template-columns:1fr;gap:16px}.step-number{width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:10px}.risk-card{border-left:4px solid var(--blue)}.risk-card strong{display:block;color:#101828;margin:8px 0 4px}.faq-list{display:grid;gap:14px}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{padding:56px 18px;background:var(--gradient);color:#fff;text-align:center;border-radius:34px;max-width:1180px;margin:48px auto}.cta-section h2{font-size:30px;margin:0 0 12px}.cta-section p{max-width:720px;margin:0 auto 22px;color:rgba(255,255,255,.88)}
.page-hero{background:linear-gradient(180deg,#f7f9ff 0%,#fff 100%);padding:52px 0 28px}.page-hero .category-badge{margin-bottom:12px}.page-hero h1{font-size:34px;line-height:1.2;margin:0 0 12px}.page-hero p{margin:0;color:var(--muted);max-width:780px}.page-layout{display:grid;grid-template-columns:1fr;gap:22px;padding:36px 0 60px}.article-body{display:grid;gap:20px}.article-body p{margin:0;color:#445166}.side-panel{display:grid;gap:16px;align-content:start}.check-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}.check-list li{padding:12px 14px;background:#f7f9fd;border:1px solid var(--line);border-radius:16px;color:#344054}.download-area{margin-top:6px}.download-steps{counter-reset:item;display:grid;gap:14px}.download-steps li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}.download-steps li:before{counter-increment:item;content:counter(item);display:inline-flex;width:28px;height:28px;border-radius:50%;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:800;margin-right:8px}
.site-footer{background:#111827;color:#d0d5dd;padding:36px 18px}.footer-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1fr;gap:24px}.footer-brand{color:#fff;font-size:20px;font-weight:900;margin-bottom:8px}.site-footer p{margin:0;max-width:680px;color:#98a2b3}.footer-links{display:flex;flex-wrap:wrap;gap:14px}.footer-links a{color:#d0d5dd}.footer-links a:hover{color:#fff}
@media (min-width:700px){.quick-task-entries,.security-grid,.data-grid,.usage-grid,.risk-grid,.info-grid{grid-template-columns:repeat(2,1fr)}.connection-capability-overview{grid-template-columns:repeat(2,1fr)}.process-steps{grid-template-columns:repeat(2,1fr)}.device-stack{grid-template-columns:repeat(2,1fr)}.hero-copy h1{font-size:48px}.page-hero h1{font-size:42px}}
@media (min-width:980px){.nav-toggle{display:none}.site-nav{display:flex}.hero-inner{grid-template-columns:1.02fr .98fr}.connection-workspace-hero{padding:76px 18px 54px}.hero-copy h1{font-size:58px}.hero-visual .status-panel{position:absolute;right:-4px;bottom:-18px;width:310px;margin:0}.quick-task-entries{grid-template-columns:repeat(4,1fr)}.connection-capability-overview{grid-template-columns:1.2fr 1fr 1fr;grid-auto-rows:minmax(170px,auto)}.capability-card.featured{grid-row:span 2}.split-section{grid-template-columns:1fr 1fr}.security-grid,.data-grid,.usage-grid{grid-template-columns:repeat(3,1fr)}.risk-grid{grid-template-columns:repeat(3,1fr)}.process-steps{grid-template-columns:repeat(3,1fr)}.page-layout{grid-template-columns:minmax(0,1fr) 330px}.footer-inner{grid-template-columns:1fr auto}.section{padding:78px 0}.section-title{font-size:38px}}