:root{--primary:#7c3aed;--primary-dark:#5b21b6;--accent:#06b6d4;--accent-light:#22d3ee;--navy:#1e1b4b;--text:#1f2937;--muted:#6b7280;--bg:#ffffff;--bg-soft:#f7f6ff;--border:#e5e7eb;--ok:#10b981;--warn:#f59e0b;--danger:#ef4444;--radius:16px;--shadow:0 8px 30px rgba(91,33,182,.12)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;color:var(--text);line-height:1.7;background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.3;font-weight:700}
.section{padding:80px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-head .kicker{display:inline-block;font-size:14px;font-weight:600;color:var(--primary);background:rgba(124,58,237,.08);padding:6px 16px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:34px;color:#111827}
.section-head p{color:var(--muted);margin-top:12px;font-size:16px}
/* nav */
.topbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.nav .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--navy)}
.nav .brand img{width:32px;height:32px;border-radius:8px}
.nav .brand span b{color:var(--primary)}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{font-size:15px;font-weight:500;color:var(--text)}
.nav-menu a:hover{color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang-switch{font-size:13px;font-weight:600;color:var(--muted);border:1px solid var(--border);padding:6px 12px;border-radius:8px}
.lang-switch:hover{border-color:var(--primary);color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:.2s}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(91,33,182,.22)}
.btn-ghost{border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:8px 18px;font-size:14px;border-radius:9px}
.btn-lg{padding:15px 34px;font-size:16px}
/* hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(34,211,238,.18),transparent 60%),linear-gradient(160deg,var(--navy),#2b2360 55%,#3b2a7a);color:#fff;padding:90px 0 70px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:46px;line-height:1.2}
.hero h1 .hl{background:linear-gradient(90deg,var(--accent-light),#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{margin:22px 0 28px;font-size:18px;color:#c9c5ec;max-width:540px}
.hero .meta{display:flex;gap:26px;margin-top:26px;color:#b6b1e6;font-size:14px}
.hero .meta b{display:block;font-size:22px;color:#fff}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
/* simulator */
.sim{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:22px;backdrop-filter:blur(8px)}
.sim-top{display:flex;align-items:center;gap:8px;margin-bottom:16px}
.sim-top .dot{width:11px;height:11px;border-radius:50%}
.sim-top .dot.r{background:#ff5f57}.sim-top .dot.y{background:#febc2e}.sim-top .dot.g{background:#28c840}
.sim-top .url{margin-left:10px;flex:1;background:rgba(0,0,0,.25);border-radius:7px;padding:6px 12px;font-size:12px;color:#c9c5ec}
.sim-body{display:flex;gap:16px}
.sim-side{width:150px;background:rgba(0,0,0,.18);border-radius:12px;padding:14px}
.sim-side .logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px;margin-bottom:16px}
.sim-side .logo img{width:24px;height:24px;border-radius:6px}
.sim-side .item{font-size:12px;color:#b6b1e6;padding:8px 10px;border-radius:8px;margin-bottom:4px}
.sim-side .item.on{background:rgba(124,58,237,.35);color:#fff}
.sim-main{flex:1}
.sim-card{background:#fff;color:var(--text);border-radius:14px;padding:18px}
.sim-status{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.sim-status .conn{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600}
.sim-status .ping{font-size:12px;color:var(--ok)}
.big-connect{width:100%;padding:16px;border:none;border-radius:12px;font-size:17px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));margin-bottom:14px}
.sim-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.sim-stats .st{background:var(--bg-soft);border-radius:10px;padding:10px;text-align:center}
.sim-stats .st b{display:block;font-size:16px;color:var(--primary)}
.sim-stats .st span{font-size:11px;color:var(--muted)}
.sim-list{margin-top:14px}
.sim-list .node{display:flex;align-items:center;justify-content:space-between;padding:9px 12px;border-radius:9px;font-size:13px;margin-bottom:6px;background:var(--bg-soft)}
.sim-list .node .flag{margin-right:8px}
.sim-list .node.sel{background:rgba(124,58,237,.1);border:1px solid rgba(124,58,237,.3)}
/* cards grid */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:.25s}
.card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-4px)}
.card .ic{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;background:linear-gradient(135deg,rgba(124,58,237,.12),rgba(6,182,212,.12));margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}
/* notice */
.notice-bar{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:16px;padding:24px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.notice-bar .tag{background:rgba(255,255,255,.2);padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600}
.notice-bar p{flex:1;min-width:240px}
.notice-bar a{color:#fff;font-weight:700;text-decoration:underline}
/* trust */
.trust-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.trust-row .badge{background:var(--bg-soft);border:1px solid var(--border);border-radius:12px;padding:14px 22px;font-weight:600;color:var(--text);font-size:14px;display:flex;align-items:center;gap:8px}
.trust-row .badge .ic{font-size:20px}
/* scenarios */
.scenario{border-radius:var(--radius);padding:30px;border:1px solid var(--border)}
.scenario .tag{font-size:12px;color:var(--primary);font-weight:700}
.scenario h3{font-size:20px;margin:10px 0}
.scenario p{color:var(--muted);font-size:14px}
/* compare table */
.cmp{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}
.cmp table{width:100%;border-collapse:collapse;min-width:640px}
.cmp th,.cmp td{padding:16px 18px;text-align:center;font-size:14px}
.cmp th{background:var(--navy);color:#fff;font-weight:600}
.cmp th.hl{background:linear-gradient(135deg,var(--primary),var(--accent))}
.cmp td{border-top:1px solid var(--border)}
.cmp tr.self{background:rgba(124,58,237,.05)}
.cmp .yes{color:var(--ok);font-weight:700}
.cmp .no{color:var(--muted)}
/* news tabs */
.tabs{display:flex;gap:10px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}
.tabs a{padding:9px 20px;border-radius:999px;font-size:14px;font-weight:600;border:1px solid var(--border);color:var(--muted)}
.tabs a.on{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent}
.news-card{display:flex;gap:18px;padding:20px;border:1px solid var(--border);border-radius:14px;transition:.2s}
.news-card:hover{border-color:var(--primary)}
.news-card .thumb{width:120px;height:80px;border-radius:10px;object-fit:cover;flex-shrink:0;background:var(--bg-soft)}
.news-card .body h4{font-size:16px;margin-bottom:6px}
.news-card .body .meta{font-size:12px;color:var(--muted)}
.news-card .body p{font-size:13px;color:var(--muted);margin-top:6px}
/* reviews */
.review{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.review .stars{color:var(--warn);font-size:16px;letter-spacing:2px}
.review p{color:var(--text);font-size:14px;margin:12px 0}
.review .user{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.review .user .av{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
/* download platforms */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.dl-item{background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:24px 16px;text-align:center;transition:.2s}
.dl-item:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow)}
.dl-item .ic{font-size:34px;margin-bottom:12px}
.dl-item h4{font-size:15px;margin-bottom:14px}
/* faq */
.faq-item{border:1px solid var(--border);border-radius:14px;margin-bottom:16px;overflow:hidden}
.faq-q{width:100%;text-align:left;padding:20px 24px;font-size:16px;font-weight:600;background:var(--bg-soft);display:flex;justify-content:space-between;align-items:center;cursor:pointer;border:none}
.faq-q .arrow{color:var(--primary)}
.faq-a{padding:0 24px 20px}
.faq-a ol{padding-left:20px;list-style:decimal}
.faq-a ol li{margin:10px 0;color:var(--text);font-size:14px}
/* CTA */
.cta{background:linear-gradient(135deg,var(--navy),#3b2a7a);color:#fff;text-align:center;border-radius:24px;padding:64px 40px}
.cta h2{font-size:34px}
.cta p{color:#c9c5ec;margin:16px 0 28px}
/* footer */
footer{background:var(--navy);color:#b6b1e6;padding:56px 0 24px;margin-top:80px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px}
footer h4{color:#fff;font-size:15px;margin-bottom:16px}
footer .flink a{display:block;font-size:13px;margin-bottom:10px;color:#b6b1e6}
footer .flink a:hover{color:#fff}
footer .copy{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;text-align:center;font-size:12px}
footer .copy a{color:#c9c5ec;margin:0 8px}
/* page hero (subpages) */
.page-hero{background:linear-gradient(160deg,var(--navy),#3b2a7a);color:#fff;padding:64px 0}
.page-hero h1{font-size:38px}
.page-hero p{color:#c9c5ec;margin-top:12px;max-width:680px}
.breadcrumb{font-size:13px;color:#b6b1e6;margin-bottom:16px}
.breadcrumb a{color:#c9c5ec}
.breadcrumb a:hover{color:#fff}
/* article */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:40px}
.article{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:40px}
.article h1{font-size:30px;margin-bottom:16px}
.article .meta{font-size:13px;color:var(--muted);margin-bottom:24px;display:flex;gap:16px;flex-wrap:wrap}
.article .meta .cat{color:var(--primary);font-weight:600}
.article .lead{font-size:17px;color:#374151;background:var(--bg-soft);padding:18px 22px;border-left:4px solid var(--primary);border-radius:8px;margin-bottom:28px}
.article h2{font-size:22px;margin:32px 0 14px;color:#111827}
.article p{margin:14px 0;color:#374151;font-size:15px}
.article img{border-radius:12px;margin:20px 0}
.article blockquote{border-left:4px solid var(--accent);background:var(--bg-soft);padding:14px 18px;margin:18px 0;border-radius:0 8px 8px 0;font-size:14px;color:#374151}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:36px;padding-top:20px;border-top:1px solid var(--border)}
.article-nav a{font-size:14px;color:var(--primary)}
.article-nav a:hover{text-decoration:underline}
/* sidebar */
.sidebar .box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:24px}
.sidebar .box h3{font-size:16px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.sidebar .hot a{display:flex;gap:10px;margin-bottom:14px;font-size:13px;align-items:center}
.sidebar .hot a .n{width:22px;height:22px;border-radius:6px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0}
.sidebar .cats a{display:inline-block;font-size:13px;margin:0 8px 8px 0;padding:6px 14px;border:1px solid var(--border);border-radius:999px;color:var(--muted)}
.sidebar .cats a:hover{border-color:var(--primary);color:var(--primary)}
/* related */
.related{margin-top:48px}
.related h2{font-size:22px;margin-bottom:20px}
/* misc */
.center{text-align:center}
.mt{margin-top:24px}
@media(max-width:960px){
.hero-grid,.article-layout{grid-template-columns:1fr}
.grid-3,.grid-2,.dl-grid{grid-template-columns:1fr 1fr}
.foot-grid{grid-template-columns:1fr 1fr}
.nav-menu{display:none}
.hero h1{font-size:32px}
}
@media(max-width:600px){
.grid-3,.grid-2,.dl-grid{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr}
.section{padding:56px 0}
}