:root{--navy:#0a1f44;--teal:#00c2a8;--teal2:#00d4aa;--bg:#f5f7fb;--ink:#1a2b3c;--muted:#5b6b7f;--line:#e4e9f2;--white:#fff;--grad:linear-gradient(135deg,#0a1f44 0%,#123a6b 55%,#00c2a8 130%);--shadow:0 10px 30px rgba(10,31,68,.10);--radius:16px}
*{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,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;cursor:pointer}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0}
/* topbar */
.topbar{background:var(--navy);color:#cfe0f5;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a:hover{color:#fff}
.topbar .lang a{padding:2px 8px;border:1px solid #2a4a76;border-radius:6px;margin-left:6px}
.topbar .lang a.on{background:var(--teal);border-color:var(--teal);color:#04211d;font-weight:600}
/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;height:66px;gap:28px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--navy)}
.brand img{width:34px;height:34px;border-radius:8px}
.brand small{font-weight:600;color:var(--teal);font-size:12px;display:block;line-height:1}
nav.main{margin-left:auto;display:flex;gap:22px;align-items:center}
nav.main a{font-size:15px;font-weight:500;color:#2c3e54;padding:6px 2px;border-bottom:2px solid transparent}
nav.main a:hover{color:var(--teal);border-color:var(--teal)}
.btn{border-radius:10px;font-weight:600;padding:11px 22px;display:inline-block;transition:.2s}
.btn.teal{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(0,194,168,.35)}
.btn.teal:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,194,168,.45)}
.btn.ghost{border:2px solid var(--teal);color:var(--teal);background:transparent}
.btn.ghost:hover{background:var(--teal);color:#fff}
.btn.lg{padding:14px 30px;font-size:16px}
/* hero */
.hero{background:var(--grad);color:#fff;padding:64px 0 70px;position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero .kicker{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:5px 14px;border-radius:999px;font-size:13px;margin-bottom:18px}
.hero h1{font-size:40px;line-height:1.25;margin-bottom:16px;font-weight:800}
.hero h1 .hl{color:#7ef0dd}
.hero p.lead{font-size:17px;color:#d5e6f7;margin-bottom:26px;max-width:520px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero .cta .btn.teal{background:#00e0bf;color:#04211d}
.hero .meta{margin-top:24px;display:flex;gap:26px;font-size:14px;color:#bcd3ec;flex-wrap:wrap}
.hero .meta b{display:block;font-size:22px;color:#fff}
/* simulator */
.sim{background:#0b2440;border:1px solid rgba(255,255,255,.14);border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.35);overflow:hidden;font-family:"Segoe UI",Arial,sans-serif}
.sim .titlebar{display:flex;align-items:center;gap:8px;padding:11px 14px;background:#0d2b4d;border-bottom:1px solid rgba(255,255,255,.1)}
.sim .dot{width:11px;height:11px;border-radius:50%;display:inline-block}
.sim .dot.r{background:#ff5f57}.sim .dot.y{background:#febc2e}.sim .dot.g{background:#28c840}
.sim .titlebar span{color:#9fc0e0;font-size:12px;margin-left:6px}
.sim .body{padding:16px}
.sim .status{display:flex;align-items:center;gap:10px;background:rgba(0,194,168,.16);border:1px solid rgba(0,194,168,.4);border-radius:10px;padding:11px 13px;margin-bottom:14px}
.sim .status .pulse{width:10px;height:10px;border-radius:50%;background:#00e0bf;box-shadow:0 0 0 4px rgba(0,224,191,.25)}
.sim .status b{color:#7ef0dd;font-size:13px}
.sim .status small{color:#9fc0e0;margin-left:auto;font-size:11px}
.sim .row{display:flex;justify-content:space-between;color:#cfe0f5;font-size:12px;padding:8px 2px;border-bottom:1px dashed rgba(255,255,255,.08)}
.sim .row b{color:#fff}
.sim .chart{display:flex;align-items:flex-end;gap:6px;height:70px;margin:14px 0;padding:0 2px}
.sim .chart i{flex:1;background:linear-gradient(180deg,#00e0bf,#007a6b);border-radius:3px 3px 0 0;min-height:14px}
.sim .locate{display:flex;gap:10px;margin-top:12px}
.sim .locate .card{flex:1;background:#0f2c50;border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:11px;font-size:12px;color:#9fc0e0}
.sim .locate .card b{display:block;color:#fff;font-size:13px;margin-bottom:4px}
/* section */
section{padding:58px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 38px}
.sec-head .tag{color:var(--teal);font-weight:700;font-size:13px;letter-spacing:1px;text-transform:uppercase}
.sec-head h2{font-size:30px;color:var(--navy);margin:8px 0 12px;font-weight:800}
.sec-head p{color:var(--muted);font-size:16px}
/* features */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s;box-shadow:0 2px 8px rgba(10,31,68,.04)}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cdeee7}
.card .ic{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#e6f9f4,#cdf2ea);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ic svg{width:26px;height:26px}
.card h3{font-size:19px;color:var(--navy);margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
/* notice */
.notice{background:linear-gradient(135deg,#0a1f44,#123a6b);color:#d5e6f7;border-radius:var(--radius);padding:22px 26px;display:flex;gap:14px;align-items:flex-start;margin:0 auto}
.notice .badge{background:var(--teal);color:#04211d;font-weight:700;font-size:12px;padding:4px 10px;border-radius:6px;white-space:nowrap}
.notice b{color:#fff}
/* trust */
.trust{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust .logos{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;align-items:center}
.trust .logos .badge-item{background:#f0f5fb;border:1px solid var(--line);border-radius:12px;padding:12px 20px;font-weight:600;color:#2c3e54;font-size:14px;display:flex;align-items:center;gap:8px}
/* scenarios */
.scen .grid3 .card .ic{background:linear-gradient(135deg,#eef3ff,#dde8ff)}
/* compare */
.cmp table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.cmp th,.cmp td{padding:15px 16px;text-align:center;font-size:15px;border-bottom:1px solid var(--line)}
.cmp th{background:var(--navy);color:#fff;font-weight:600}
.cmp th:first-child,.cmp td:first-child{text-align:left}
.cmp tr:last-child td{border-bottom:none}
.cmp .yes{color:var(--teal);font-weight:700}
.cmp .no{color:#c0392b}
.cmp .me{background:#eefaf7}
.cmp .me td:first-child{font-weight:700;color:var(--navy)}
/* news tabs */
.tabs{display:flex;gap:10px;justify-content:center;margin-bottom:28px;flex-wrap:wrap}
.tabs a{padding:9px 20px;border-radius:999px;background:#fff;border:1px solid var(--line);font-weight:600;color:#2c3e54;font-size:14px}
.tabs a.on{background:var(--grad);color:#fff;border-color:transparent}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-grid .card{padding:0;overflow:hidden}
.news-grid .card img{width:100%;height:150px;object-fit:cover}
.news-grid .card .pad{padding:18px}
.news-grid .card h3{font-size:16px;line-height:1.5}
.news-grid .card .date{color:var(--muted);font-size:12px;margin:8px 0}
.news-grid .card .cat{color:var(--teal);font-weight:600;font-size:12px}
/* reviews */
.rev .grid2 .card{position:relative}
.rev .stars{color:#f5a623;letter-spacing:2px;font-size:15px}
.rev .who{display:flex;align-items:center;gap:10px;margin-top:16px}
.rev .who .avatar{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.rev .who b{font-size:14px;display:block}
.rev .who small{color:var(--muted);font-size:12px}
/* download */
.dl{background:var(--grad);color:#fff}
.dl .sec-head h2{color:#fff}
.dl .sec-head p{color:#cfe0f5}
.platforms{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.platforms a{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:22px 10px;text-align:center;transition:.25s;display:block}
.platforms a:hover{background:rgba(255,255,255,.22);transform:translateY(-4px)}
.platforms .pf{font-size:34px;line-height:1}
.platforms b{display:block;color:#fff;margin:8px 0 2px}
.platforms small{color:#cfe0f5;font-size:12px}
/* faq */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-item details summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:600;color:var(--navy);font-size:16px;display:flex;justify-content:space-between;align-items:center}
.faq-item details summary::-webkit-details-marker{display:none}
.faq-item details summary:after{content:"+";font-size:22px;color:var(--teal);font-weight:400}
.faq-item details[open] summary:after{content:"–"}
.faq-item .ans{padding:0 22px 20px;color:var(--muted);font-size:15px}
.faq-item .ans ol{margin:10px 0 0 20px}
.faq-item .ans ol li{margin-bottom:8px}
/* cta */
.cta{background:var(--grad);border-radius:var(--radius);padding:50px 40px;text-align:center;color:#fff}
.cta h2{font-size:28px;margin-bottom:12px}
.cta p{color:#cfe0f5;margin-bottom:26px}
/* footer */
footer{background:var(--navy);color:#9fb8d4;padding:50px 0 30px;font-size:14px}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
footer h4{color:#fff;margin-bottom:14px;font-size:15px}
footer a{display:block;margin-bottom:8px}
footer a:hover{color:var(--teal2)}
footer .foot-brand{font-size:15px}
footer .foot-brand img{width:36px;height:36px;border-radius:8px;margin-bottom:12px}
footer .copyright{border-top:1px solid #1d3a60;padding-top:20px;text-align:center;color:#6d87a6;font-size:13px}
footer .sitemap-link{color:#9fb8d4;text-decoration:underline}
/* breadcrumb */
.bc{background:#fff;border-bottom:1px solid var(--line);padding:14px 0;font-size:14px;color:var(--muted)}
.bc a{color:var(--teal)}
.bc .sep{margin:0 8px;color:#b7c4d4}
/* article */
.article-hero{background:var(--grad);color:#fff;padding:46px 0}
.article-hero h1{font-size:30px;line-height:1.4;max-width:860px;font-weight:800}
.article-hero .meta{color:#cfe0f5;font-size:14px;margin-top:14px}
.article-hero .cat{background:var(--teal);color:#04211d;padding:3px 12px;border-radius:6px;font-weight:700;font-size:12px;margin-right:10px}
.layout{display:grid;grid-template-columns:1fr 300px;gap:36px;padding:44px 0}
.article-body{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px 40px;font-size:16px;color:#2c3e50}
.article-body p{margin-bottom:18px}
.article-body h2{color:var(--navy);font-size:22px;margin:30px 0 14px;font-weight:800}
.article-body img{border-radius:12px;margin:20px 0}
.article-body blockquote{border-left:4px solid var(--teal);background:#f0faf7;padding:16px 20px;border-radius:0 10px 10px 0;margin:20px 0;color:#1a5c50;font-style:normal}
.article-body .src{font-size:13px;color:var(--muted)}
.side .widget{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:20px}
.side .widget h3{font-size:16px;color:var(--navy);margin-bottom:14px;border-left:4px solid var(--teal);padding-left:10px}
.side .widget a{display:block;padding:8px 0;border-bottom:1px dashed var(--line);color:#2c3e54;font-size:14px}
.side .widget a:last-child{border-bottom:none}
.side .widget a:hover{color:var(--teal)}
.prev-next{display:flex;justify-content:space-between;gap:20px;margin-top:30px}
.prev-next a{flex:1;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;font-size:14px;color:var(--navy)}
.prev-next a:hover{border-color:var(--teal)}
.prev-next a span{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
.back-list{display:inline-block;margin-top:26px;color:var(--teal);font-weight:600}
.comments{margin-top:34px}
.comments h3{font-size:20px;color:var(--navy);margin-bottom:18px}
.comment{background:#f7fafc;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:12px}
.comment .c-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.comment .avatar{width:36px;height:36px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.comment b{font-size:14px}
.comment small{color:var(--muted);font-size:12px}
.comment p{color:#2c3e50;font-size:14px;margin:0}
/* sitemap page */
.sitemap-list a{display:block;padding:9px 0;border-bottom:1px dashed var(--line);color:#2c3e54}
.sitemap-list a:hover{color:var(--teal)}
/* 404 */
.err404{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.err404 .code{font-size:100px;font-weight:800;color:var(--navy);line-height:1}
.err404 h1{font-size:26px;margin:10px 0;color:var(--navy)}
.err404 p{color:var(--muted);margin-bottom:26px}
@media(max-width:960px){
.hero .wrap{grid-template-columns:1fr}
.grid3,.news-grid{grid-template-columns:repeat(2,1fr)}
.platforms{grid-template-columns:repeat(2,1fr)}
.layout{grid-template-columns:1fr}
nav.main{display:none}
footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
.grid3,.grid2,.news-grid,.platforms{grid-template-columns:1fr}
.hero h1{font-size:30px}
.cmp{overflow-x:auto}
.cmp table{min-width:600px}
}