:root{
  --primary:#0b2e5c;
  --primary-deep:#071f3d;
  --accent:#0ea5e9;
  --teal:#14b8a6;
  --gold:#f5b301;
  --bg:#f4f8fb;
  --bg-soft:#eaf3fb;
  --text:#1e293b;
  --muted:#64748b;
  --line:#dbe7f1;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 10px 30px rgba(11,46,92,.08);
  --shadow-lg:0 20px 50px rgba(11,46,92,.14);
  --serif:Georgia,"Times New Roman","Songti SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
img{max-width:100%;display:block}
.container{width:min(1180px,92%);margin:0 auto}
.serif{font-family:var(--serif)}

.topbar{background:var(--primary-deep);color:#cfe3f7;font-size:13px;padding:8px 0}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.topbar a{color:#cfe3f7}
.topbar a:hover{color:var(--white)}

.header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:44px;width:auto}
.logo .brand{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--primary)}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-size:15px;color:var(--text);font-weight:500;position:relative;padding:6px 0}
.nav a:hover{color:var(--accent)}
.nav a.active{color:var(--accent)}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--accent);border-radius:2px}
.nav a.nav-cta{background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;padding:10px 22px;border-radius:40px;font-weight:600;white-space:nowrap}
.nav a.nav-cta:hover{opacity:.92;color:#fff}
.menu-toggle{display:none;background:none;border:none;font-size:26px;color:var(--primary);cursor:pointer}

.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:40px;font-weight:600;font-size:15px;transition:.25s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;box-shadow:0 8px 20px rgba(14,165,233,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,165,233,.45)}
.btn-outline{border-color:var(--line);color:var(--primary);background:#fff}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-white{background:#fff;color:var(--primary)}
.btn-gold{background:linear-gradient(135deg,#f5b301,#f28c00);color:#fff}

.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,rgba(14,165,233,.22),transparent 55%),linear-gradient(160deg,var(--primary-deep),var(--primary));color:#fff;overflow:hidden;padding:80px 0 70px}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:28px 28px}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(14,165,233,.18);border:1px solid rgba(14,165,233,.4);color:#bde9ff;padding:6px 16px;border-radius:40px;font-size:13px;margin-bottom:20px}
.hero h1{font-family:var(--serif);font-size:46px;line-height:1.2;margin-bottom:20px}
.hero h1 span{background:linear-gradient(90deg,var(--gold),#ffe08a);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:#d3e6f8;font-size:17px;max-width:520px;margin-bottom:30px}
.hero-stats{display:flex;gap:36px;margin-top:34px}
.hero-stats .num{font-family:var(--serif);font-size:32px;font-weight:700;color:var(--gold)}
.hero-stats .lbl{font-size:13px;color:#a9c9e8}

.simulator{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:18px;backdrop-filter:blur(8px);box-shadow:0 24px 60px rgba(0,0,0,.28)}
.sim-head{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:16px}
.sim-dot{width:11px;height:11px;border-radius:50%}
.sim-dot.r{background:#ff5f57}.sim-dot.y{background:#febc2e}.sim-dot.g{background:#28c840}
.sim-title{margin-left:8px;font-size:13px;color:#cfe3f7}
.sim-body{display:flex;flex-direction:column;gap:14px}
.sim-status{display:flex;justify-content:space-between;align-items:center;background:rgba(11,46,92,.5);border-radius:12px;padding:14px 16px}
.sim-status .lbl{font-size:13px;color:#b9d6f0}
.sim-status .val{font-size:15px;font-weight:700;color:#5eead4}
.sim-toggle{display:flex;align-items:center;gap:8px;font-size:13px;color:#cfe3f7}
.toggle{width:44px;height:24px;background:rgba(255,255,255,.2);border-radius:20px;position:relative;cursor:pointer}
.toggle::after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;background:#fff;border-radius:50%;transition:.25s}
.toggle.on{background:var(--teal)}
.toggle.on::after{left:23px}
.sim-list{display:flex;flex-direction:column;gap:10px}
.sim-item{display:flex;justify-content:space-between;align-items:center;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:12px 14px}
.sim-item .ctry{display:flex;align-items:center;gap:10px;font-size:14px}
.sim-item .flag{width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:14px;background:rgba(255,255,255,.12)}
.sim-item .ping{font-size:13px;color:#5eead4;font-weight:600}
.sim-item .bar{width:70px;height:4px;background:rgba(255,255,255,.15);border-radius:4px;overflow:hidden}
.sim-item .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--teal));border-radius:4px}

.section{padding:80px 0}
.section.alt{background:var(--bg)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 52px}
.sec-head .kicker{display:inline-block;color:var(--accent);font-weight:600;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.sec-head h2{font-family:var(--serif);font-size:36px;color:var(--primary);margin-bottom:16px}
.sec-head p{color:var(--muted);font-size:16px}

.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.3s;box-shadow:var(--shadow)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.feature-card .icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--teal));display:flex;align-items:center;justify-content:center;margin-bottom:20px;color:#fff}
.feature-card h3{font-family:var(--serif);font-size:20px;color:var(--primary);margin-bottom:12px}
.feature-card p{color:var(--muted);font-size:14px}

.announce{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.announce-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;display:flex;gap:16px;align-items:flex-start;transition:.25s}
.announce-card:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.announce-card .tag{flex:none;background:var(--bg-soft);color:var(--accent);font-size:12px;font-weight:700;padding:4px 10px;border-radius:6px}
.announce-card .date{font-size:12px;color:var(--muted);margin-top:6px}
.announce-card h4{font-size:15px;color:var(--text);margin-bottom:4px;line-height:1.5}
.announce-card h4 a:hover{color:var(--accent)}

.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center;transition:.25s}
.trust-item:hover{border-color:var(--accent)}
.trust-item .big{font-family:var(--serif);font-size:34px;font-weight:700;color:var(--primary);margin-bottom:8px}
.trust-item .lbl{font-size:14px;color:var(--muted)}

.scene-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;overflow:hidden}
.scene-card::before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(180deg,var(--accent),var(--teal))}
.scene-card h3{font-family:var(--serif);font-size:19px;color:var(--primary);margin-bottom:10px}
.scene-card p{color:var(--muted);font-size:14px}

.tabs{display:flex;justify-content:center;gap:10px;margin-bottom:36px;flex-wrap:wrap}
.tab-btn{border:1px solid var(--line);background:#fff;color:var(--text);padding:10px 22px;border-radius:40px;font-size:14px;font-weight:600;cursor:pointer;transition:.25s}
.tab-btn.active{background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;border-color:transparent}
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.news-card .cover{height:170px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.85);font-size:40px}
.news-card .body{padding:22px;display:flex;flex-direction:column;flex:1}
.news-card .meta{display:flex;gap:12px;font-size:12px;color:var(--muted);margin-bottom:10px}
.news-card .meta .cat{color:var(--accent);font-weight:600}
.news-card h3{font-size:17px;line-height:1.5;color:var(--text);margin-bottom:10px}
.news-card h3 a:hover{color:var(--accent)}
.news-card .excerpt{font-size:13px;color:var(--muted);flex:1}
.news-card .more{font-size:13px;color:var(--accent);font-weight:600;margin-top:14px}

.download-banner{background:linear-gradient(135deg,var(--primary-deep),var(--primary));border-radius:24px;padding:56px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:32px;color:#fff}
.download-banner h2{font-family:var(--serif);font-size:32px;margin-bottom:12px}
.download-banner p{color:#cfe3f7;margin-bottom:24px}
.platforms{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:36px}
.platform{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.25s}
.platform:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.platform .ic{font-size:34px;margin-bottom:12px}
.platform .name{font-size:15px;font-weight:600;color:var(--primary)}
.platform .ver{font-size:12px;color:var(--muted);margin:6px 0 14px}
.platform .dl{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;padding:8px 20px;border-radius:30px;font-size:13px;font-weight:600}
.platform .dl:hover{opacity:.9}

.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:var(--sans)}
.faq-q .arr{flex:none;width:24px;height:24px;border-radius:50%;background:var(--bg-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;transition:.3s;font-size:14px}
.faq-item.open .faq-q .arr{transform:rotate(45deg);background:var(--accent);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:.35s}
.faq-a p{padding:0 24px 20px;color:var(--muted);font-size:14px}
.faq-item.open .faq-a{max-height:400px}

.cta{background:radial-gradient(800px 400px at 50% -20%,rgba(14,165,233,.25),transparent 55%),linear-gradient(150deg,var(--primary-deep),var(--primary));color:#fff;text-align:center;padding:90px 0;border-radius:0}
.cta h2{font-family:var(--serif);font-size:38px;margin-bottom:16px}
.cta p{color:#cfe3f7;max-width:560px;margin:0 auto 32px}
.cta .btn-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

.footer{background:var(--primary-deep);color:#9db8d6;padding:60px 0 24px}
.footer .grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer .brand-txt{color:#cfe3f7;font-size:14px;margin-top:16px;max-width:300px}
.footer h4{color:#fff;font-size:15px;margin-bottom:18px}
.footer a{display:block;font-size:14px;margin-bottom:12px}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding-top:22px;text-align:center;font-size:13px}

.crumb{background:var(--bg);border-bottom:1px solid var(--line);padding:14px 0}
.crumb nav ol{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.crumb nav ol li a{color:var(--muted)}
.crumb nav ol li a:hover{color:var(--accent)}
.crumb nav ol li+li::before{content:"/";margin-right:8px;color:#cbd5e1}
.crumb nav ol li[aria-current]{color:var(--primary);font-weight:700}

.page-head{background:linear-gradient(150deg,var(--primary-deep),var(--primary));color:#fff;padding:60px 0;text-align:center}
.page-head h1{font-family:var(--serif);font-size:38px;margin-bottom:14px}
.page-head p{color:#cfe3f7;max-width:620px;margin:0 auto}

.article{max-width:800px;margin:0 auto;padding:56px 0}
.article .a-meta{display:flex;gap:16px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.article .a-meta .cat{background:var(--bg-soft);color:var(--accent);padding:4px 12px;border-radius:6px;font-weight:600}
.article h1{font-family:var(--serif);font-size:34px;color:var(--primary);line-height:1.35;margin-bottom:24px}
.article .cover{border-radius:18px;overflow:hidden;margin-bottom:32px;box-shadow:var(--shadow)}
.article .cover img{width:100%;height:auto}
.article .content{font-size:16px;line-height:1.9;color:#334155}
.article .content p{margin-bottom:22px}
.article .content h2{font-family:var(--serif);font-size:24px;color:var(--primary);margin:36px 0 16px;padding-left:14px;border-left:4px solid var(--accent)}
.article .content img{width:100%;border-radius:12px;margin:20px 0}
.article .content figure{margin:24px 0}
.article .content figure figcaption{font-size:12px;color:var(--muted);text-align:center;margin-top:8px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.article-nav a{font-size:14px;color:var(--primary)}
.article-nav a:hover{color:var(--accent)}
.back-list{display:inline-block;margin-top:8px;color:var(--accent);font-weight:600;font-size:14px}

.news-page-list{display:grid;grid-template-columns:1fr;gap:22px}
.news-page-item{display:grid;grid-template-columns:220px 1fr;gap:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.25s}
.news-page-item:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.news-page-item .cover{height:140px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.85);font-size:32px}
.news-page-item .meta{font-size:12px;color:var(--muted);margin-bottom:8px}
.news-page-item .meta .cat{color:var(--accent);font-weight:600;margin-right:10px}
.news-page-item h3{font-size:19px;margin-bottom:10px}
.news-page-item h3 a:hover{color:var(--accent)}
.news-page-item p{font-size:14px;color:var(--muted)}

.sitemap-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.sitemap-cols .col{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.sitemap-cols h3{font-family:var(--serif);font-size:18px;color:var(--primary);margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--bg-soft)}
.sitemap-cols a{display:block;font-size:14px;color:var(--muted);padding:6px 0}
.sitemap-cols a:hover{color:var(--accent)}

.err-page{text-align:center;padding:120px 0}
.err-page .code{font-family:var(--serif);font-size:120px;font-weight:700;color:var(--primary);line-height:1}
.err-page h2{font-family:var(--serif);font-size:28px;margin:20px 0 12px}
.err-page p{color:var(--muted);margin-bottom:30px}
.err-count{color:var(--accent);font-weight:700}

@media(max-width:960px){
  .hero .container{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .trust{grid-template-columns:repeat(2,1fr)}
  .news-list{grid-template-columns:1fr}
  .platforms{grid-template-columns:repeat(2,1fr)}
  .footer .grid{grid-template-columns:1fr 1fr}
  .download-banner{grid-template-columns:1fr;text-align:center;padding:40px 28px}
  .news-page-item{grid-template-columns:1fr}
  .sitemap-cols{grid-template-columns:1fr}
  .announce{grid-template-columns:1fr}
}
@media(max-width:640px){
  .grid-3,.grid-4,.grid-2,.trust{grid-template-columns:1fr}
  .platforms{grid-template-columns:1fr}
  .nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .menu-toggle{display:block}
  .hero h1{font-size:34px}
  .sec-head h2{font-size:28px}
  .footer .grid{grid-template-columns:1fr}
}

.chat-sim{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:18px;backdrop-filter:blur(8px);box-shadow:0 24px 60px rgba(0,0,0,.28)}
.chat-sim .sim-head{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:16px}
.chat-sim .sim-title{margin-left:8px;font-size:13px;color:#cfe3f7}
.chat-sim .chat-tabs{display:flex;gap:8px;margin-bottom:16px}
.chat-sim .chat-tab{flex:1;text-align:center;padding:9px 6px;border-radius:10px;font-size:13px;font-weight:600;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);color:#cfe3f7}
.chat-sim .chat-tab.active{background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;border-color:transparent}
.chat-sim .chat-list{display:flex;flex-direction:column;gap:10px}
.chat-sim .chat-item{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:11px 14px}
.chat-sim .avatar{flex:none;width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;background:rgba(14,165,233,.25);border:1px solid rgba(14,165,233,.4)}
.chat-sim .chat-meta{flex:1;min-width:0}
.chat-sim .chat-name{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:#fff}
.chat-sim .chat-name .plat{font-size:10px;font-weight:700;padding:2px 7px;border-radius:5px;background:rgba(20,184,166,.22);color:#5eead4}
.chat-sim .chat-preview{font-size:12px;color:#a9c9e8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.chat-sim .chat-badge{flex:none;min-width:20px;height:20px;border-radius:10px;background:var(--gold);color:#5a3b00;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;padding:0 6px}
.chat-sim .translate-bar{display:flex;align-items:center;gap:10px;margin-top:14px;background:rgba(11,46,92,.55);border-radius:12px;padding:12px 14px}
.chat-sim .translate-bar .src{flex:1;font-size:13px;color:#cfe3f7}
.chat-sim .translate-bar .arrow{color:var(--gold);font-size:16px}
.chat-sim .translate-bar .dst{flex:1;font-size:13px;color:#5eead4;text-align:right}
.stat-banner{display:flex;gap:14px;margin-top:16px}
.stat-banner .stat-chip{flex:1;text-align:center;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:12px 6px}
.stat-banner .stat-chip .v{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--gold)}
.stat-banner .stat-chip .k{font-size:11px;color:#a9c9e8;margin-top:2px}