:root{
  --navy:#0a1633;--navy2:#0f2150;--ink:#141b2d;--body:#3a4560;--muted:#7a869f;
  --cyan:#19d3c5;--blue:#2f6bff;--amber:#ffb020;--line:#e7ecf5;--bg:#f5f8fd;--card:#ffffff;
  --grad:linear-gradient(135deg,#19d3c5 0%,#2f6bff 100%);
  --shadow:0 14px 40px rgba(15,33,80,.10);--shadow-sm:0 6px 18px rgba(15,33,80,.08);
  --radius:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}
section{padding:72px 0}
.sec-head{max-width:720px;margin:0 auto 46px;text-align:center}
.sec-head .kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--blue);text-transform:uppercase;margin-bottom:12px}
.sec-head h2{font-size:34px;line-height:1.25;margin-bottom:14px;color:var(--ink)}
.sec-head p{color:var(--muted);font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:999px;padding:13px 28px;font-size:15px;transition:.25s;cursor:pointer}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(47,107,255,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(47,107,255,.38)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-amber{background:linear-gradient(135deg,#ffc233,#ff9f0a);color:#231a00;box-shadow:0 10px 22px rgba(255,159,10,.30)}
.btn-amber:hover{transform:translateY(-2px)}
.btn-lg{padding:16px 34px;font-size:16px}
.btn-sm{padding:9px 18px;font-size:13.5px}
/* header */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink)}
.brand img{width:34px;height:34px;border-radius:8px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:15px;color:var(--body);font-weight:600}
.nav a:hover{color:var(--blue)}
.nav .lang{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--body)}
/* hero */
.hero{background:radial-gradient(1100px 500px at 85% -10%,rgba(25,211,197,.18),transparent 60%),radial-gradient(900px 460px at 0% 10%,rgba(47,107,255,.16),transparent 60%),var(--navy);color:#fff;overflow:hidden;position:relative}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:64px 0 84px}
.hero h1{font-size:46px;line-height:1.16;font-weight:800;margin-bottom:18px}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:17px;color:#c8d3ea;max-width:520px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-badges{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.hero-badges .b{display:flex;align-items:center;gap:8px;font-size:14px;color:#b7c4dd}
.hero-badges .b strong{color:#fff;font-size:20px}
/* simulator */
.sim{background:linear-gradient(180deg,#101d3d,#0c1630);border:1px solid rgba(255,255,255,.10);border-radius:22px;box-shadow:0 30px 70px rgba(0,0,0,.45);overflow:hidden;position:relative}
.sim-top{display:flex;align-items:center;gap:8px;padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.sim-top .dot{width:11px;height:11px;border-radius:50%}
.sim-top .win{flex:1;text-align:center;font-size:13px;color:#93a3c4}
.sim-body{padding:20px}
.sim-status{display:flex;align-items:center;justify-content:space-between;background:rgba(25,211,197,.12);border:1px solid rgba(25,211,197,.28);border-radius:14px;padding:16px;margin-bottom:18px}
.sim-status .lbl{font-size:13px;color:#8ea0c2}
.sim-status .val{font-size:26px;font-weight:800;color:#19d3c5}
.sim-ring{width:52px;height:52px;border-radius:50%;border:4px solid rgba(25,211,197,.25);border-top-color:#19d3c5;animation:spin 1.1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.sim-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.sim-row .n{color:#c6d1e6;font-size:14px}
.sim-row .n small{display:block;color:#7d8fb3;font-size:12px}
.sim-row .s{color:#19d3c5;font-weight:700;font-size:14px}
.sim-flag{width:20px;height:20px;border-radius:50%;background:var(--grad);display:inline-block;vertical-align:middle;margin-right:8px}
.sim-note{font-size:12px;color:#6d7fa6;text-align:center;padding-top:14px}
/* features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s;box-shadow:var(--shadow-sm)}
.feature:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.feature .ic{width:52px;height:52px;border-radius:14px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;color:#fff}
.feature h3{font-size:19px;margin-bottom:10px}
.feature p{color:var(--muted);font-size:14.5px}
/* notice */
.notice{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 30px;box-shadow:var(--shadow-sm)}
.notice-item{display:flex;gap:14px;padding:12px 0;border-bottom:1px dashed var(--line);align-items:flex-start}
.notice-item:last-child{border-bottom:none}
.notice-item .tag{flex:none;background:#eef4ff;color:var(--blue);font-size:12px;font-weight:700;padding:3px 10px;border-radius:6px}
.notice-item p{color:var(--body);font-size:14.5px}
/* trust */
.trust{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.trust-grid .t strong{display:block;font-size:34px;color:var(--navy);font-weight:800}
.trust-grid .t span{color:var(--muted);font-size:14px}
/* scenarios */
.scen-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scen{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.scen h3{font-size:18px;margin-bottom:10px}
.scen p{color:var(--muted);font-size:14.5px}
/* compare */
.cmp{overflow-x:auto}
.cmp table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);min-width:640px}
.cmp th,.cmp td{padding:15px 16px;text-align:center;border-bottom:1px solid var(--line);font-size:14.5px}
.cmp th{background:var(--navy);color:#fff;font-weight:700}
.cmp td:first-child{text-align:left;font-weight:600;color:var(--ink)}
.cmp tr:nth-child(even) td{background:#fafcff}
.cmp .yes{color:#12b76a;font-weight:700}
.cmp .no{color:#c6cddc}
.cmp .hl{background:#fff7ec !important}
/* tabs news */
.tabs{display:flex;gap:10px;justify-content:center;margin-bottom:34px;flex-wrap:wrap}
.tab{padding:9px 20px;border-radius:999px;border:1.5px solid var(--line);font-weight:600;font-size:14px;color:var(--body);background:#fff}
.tab.active{background:var(--grad);color:#fff;border-color:transparent}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:block}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-card img{height:160px;width:100%;object-fit:cover}
.news-card .bd{padding:18px}
.news-card .cat{font-size:12px;color:var(--blue);font-weight:700}
.news-card h3{font-size:16px;margin:8px 0;line-height:1.4}
.news-card .meta{font-size:12.5px;color:var(--muted)}
/* reviews */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.review .stars{color:#ffb020;letter-spacing:2px;margin-bottom:12px}
.review p{color:var(--body);font-size:14.5px;margin-bottom:16px}
.review .who{display:flex;align-items:center;gap:10px}
.review .av{width:38px;height:38px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.review .who b{display:block;font-size:14px}
.review .who span{font-size:12.5px;color:var(--muted)}
/* download */
.dl{background:radial-gradient(900px 400px at 50% -10%,rgba(25,211,197,.16),transparent 60%),var(--navy);color:#fff}
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:40px}
.dl-item{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:22px;text-align:center;transition:.25s}
.dl-item:hover{background:rgba(255,255,255,.10);transform:translateY(-4px)}
.dl-item .ic{font-size:30px;margin-bottom:10px}
.dl-item h4{font-size:15px;margin-bottom:4px}
.dl-item span{font-size:12.5px;color:#aab8d2}
.dl-item .btn{margin-top:14px;width:100%}
/* faq */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-item summary{padding:20px 24px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--blue);font-weight:400}
.faq-item[open] summary::after{content:"–"}
.faq-item .ans{padding:0 24px 22px;color:var(--body);font-size:14.5px}
.faq-item .ans ol{padding-left:20px;margin-top:8px}
.faq-item .ans ol li{margin-bottom:8px}
/* cta */
.cta{background:linear-gradient(135deg,#0f2150,#0a1633);color:#fff;text-align:center}
.cta h2{font-size:34px;margin-bottom:14px}
.cta p{color:#c8d3ea;margin-bottom:28px}
/* footer */
.footer{background:#070f24;color:#a6b3cf;padding:54px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;margin-bottom:36px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer a{display:block;color:#a6b3cf;font-size:14px;padding:4px 0}
.footer a:hover{color:#19d3c5}
.footer .brand{margin-bottom:14px}
.footer .brand span{color:#fff}
.footer p{font-size:14px}
.footer-bot{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#7c8bb0}
/* breadcrumb */
.crumb{font-size:13px;color:var(--muted);margin:18px 0;display:flex;flex-wrap:wrap;gap:6px}
.crumb a{color:var(--blue)}
.crumb span{color:var(--muted)}
/* article */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:36px;align-items:start}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:38px}
.article-main h1{font-size:30px;line-height:1.3;margin:8px 0 16px}
.article-main .ameta{display:flex;gap:16px;color:var(--muted);font-size:13.5px;flex-wrap:wrap;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-main .ameta .tag{background:#eef4ff;color:var(--blue);padding:2px 10px;border-radius:6px;font-weight:700}
.article-main h2{font-size:22px;margin:30px 0 14px;color:var(--navy)}
.article-main p{color:var(--body);font-size:16px;margin-bottom:16px;text-align:justify}
.article-main img{border-radius:12px;margin:18px 0}
.article-main .lead{font-size:17px;color:var(--ink);font-weight:600;background:#f5f8fd;border-left:4px solid var(--cyan);padding:16px 20px;border-radius:10px;margin-bottom:20px}
.article-main blockquote{background:#f5f8fd;border-left:4px solid var(--blue);padding:16px 20px;border-radius:10px;margin:20px 0;color:var(--body)}
.art-nav{display:flex;justify-content:space-between;gap:14px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line);flex-wrap:wrap}
.art-nav a{color:var(--blue);font-size:14px;font-weight:600}
/* sidebar */
.side{position:sticky;top:90px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:20px}
.side-box h4{font-size:15px;margin-bottom:14px;color:var(--navy)}
.side-box ul li{margin-bottom:10px}
.side-box ul li a{font-size:14px;color:var(--body)}
.side-box ul li a:hover{color:var(--blue)}
.side-box .hot-item{display:flex;gap:10px;margin-bottom:14px}
.side-box .hot-item img{width:64px;height:48px;border-radius:8px;object-fit:cover}
.side-box .hot-item b{font-size:13.5px;line-height:1.35;font-weight:600}
/* related */
.related{margin-top:40px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:18px}
/* reviews in article */
.art-reviews{margin-top:34px}
.art-reviews .review{background:#f5f8fd;border-color:var(--line);margin-bottom:14px}
/* radio tabs */
.tabradio{display:none}
.tabpanes .pane{display:none}
#tab1:checked~.tabpanes #pane1,
#tab2:checked~.tabpanes #pane2,
#tab3:checked~.tabpanes #pane3{display:grid}
.tabs label.tab{cursor:pointer}
#tab1:checked~.tabs label[for=tab1],
#tab2:checked~.tabs label[for=tab2],
#tab3:checked~.tabs label[for=tab3]{background:var(--grad);color:#fff;border-color:transparent}
@media(max-width:960px){
  .hero-in{grid-template-columns:1fr;padding:40px 0}
  .features-grid,.scen-grid,.news-grid,.reviews-grid,.dl-grid,.related-grid,.trust-grid{grid-template-columns:repeat(2,1fr)}
  .article-layout{grid-template-columns:1fr}
  .side{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .hero h1{font-size:32px}
  .sec-head h2{font-size:26px}
  .features-grid,.scen-grid,.news-grid,.reviews-grid,.dl-grid,.related-grid,.trust-grid{grid-template-columns:1fr}
  .nav{display:none}
  .article-main{padding:24px}
}