:root{--navy:#0a1128;--navy2:#0d1b3e;--cyan:#00d4ff;--teal:#00e6b0;--orange:#ff7a45;--ink:#0b1020;--muted:#5b6b8c;--line:#e6ecf7;--bg:#f5f8ff;--card:#ffffff;--soft:#eef4ff;--radius:16px;--shadow:0 10px 40px rgba(10,17,40,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{line-height:1.35;font-weight:700;color:var(--navy)}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,17,40,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:38px;height:38px;border-radius:9px}
.brand .brand-name{color:#fff;font-weight:800;font-size:19px;letter-spacing:.5px}
.brand .brand-name span{color:var(--cyan)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:#c8d4f0;font-size:15px;font-weight:500;position:relative;padding:6px 0}
.nav a:hover,.nav a.active{color:#fff}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:linear-gradient(90deg,var(--cyan),var(--teal));border-radius:2px}
.lang-switch{display:flex;align-items:center;gap:8px;margin-left:6px}
.lang-switch a{font-size:13px;color:#9fb2d8;border:1px solid rgba(255,255,255,.2);padding:4px 10px;border-radius:20px}
.lang-switch a.on{color:var(--navy);background:var(--cyan);border-color:var(--cyan);font-weight:700}
.nav-cta{background:linear-gradient(90deg,var(--cyan),var(--teal));color:#06122b!important;font-weight:700;padding:8px 20px!important;border-radius:22px;box-shadow:0 6px 18px rgba(0,212,255,.3)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:30px;font-weight:700;font-size:16px;transition:.25s;cursor:pointer}
.btn-primary{background:linear-gradient(90deg,var(--cyan),var(--teal));color:#06122b!important;box-shadow:0 8px 24px rgba(0,212,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,212,255,.5)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff!important;border:1px solid rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-orange{background:linear-gradient(90deg,var(--orange),#ff9d3d);color:#fff!important;box-shadow:0 8px 24px rgba(255,122,69,.35)}
/* hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(0,212,255,.28),transparent 60%),radial-gradient(900px 500px at 10% 0%,rgba(0,230,176,.18),transparent 55%),linear-gradient(160deg,#0a1128,#0d1b3e 55%,#0a1128);color:#fff;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;padding-top:72px;padding-bottom:72px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,255,.12);border:1px solid rgba(0,212,255,.35);color:var(--cyan);padding:6px 16px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:22px}
.hero h1{color:#fff;font-size:44px;letter-spacing:.5px;margin-bottom:18px}
.hero h1 .grad{background:linear-gradient(90deg,var(--cyan),var(--teal));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .sub{color:#c8d4f0;font-size:18px;max-width:520px;margin-bottom:30px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-metrics{display:flex;gap:34px;margin-top:40px;flex-wrap:wrap}
.hero-metrics .m b{font-size:26px;color:#fff;display:block}
.hero-metrics .m span{font-size:13px;color:#8fa3c8}
/* client simulator */
.simulator{background:#060b18;border:1px solid rgba(255,255,255,.12);border-radius:18px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.sim-head{display:flex;align-items:center;gap:8px;padding:13px 16px;background:#0c1526;border-bottom:1px solid rgba(255,255,255,.08)}
.sim-head .dot{width:11px;height:11px;border-radius:50%}
.sim-head .dot.r{background:#ff5f57}.sim-head .dot.y{background:#febc2e}.sim-head .dot.g{background:#28c840}
.sim-head .sim-title{margin-left:8px;color:#8fa3c8;font-size:13px}
.sim-body{padding:22px}
.sim-connect{display:flex;align-items:center;justify-content:space-between;background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.3);border-radius:12px;padding:16px 18px;margin-bottom:18px}
.sim-node{display:flex;align-items:center;gap:10px}
.sim-node .flag{width:34px;height:24px;border-radius:5px;background:linear-gradient(135deg,#00d4ff,#00e6b0);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#06122b}
.sim-node .loc b{display:block;font-size:15px;color:#fff}
.sim-node .loc span{font-size:12px;color:#8fa3c8}
.sim-status{display:flex;align-items:center;gap:8px;color:var(--teal);font-size:13px;font-weight:700}
.sim-status .pulse{width:9px;height:9px;border-radius:50%;background:var(--teal);animation:pulse 1.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(0,230,176,.6)}70%{box-shadow:0 0 0 9px rgba(0,230,176,0)}100%{box-shadow:0 0 0 0 rgba(0,230,176,0)}}
.sim-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}
.sim-stat{background:#0c1526;border-radius:11px;padding:14px;text-align:center}
.sim-stat b{font-size:20px;color:var(--cyan);display:block}
.sim-stat span{font-size:12px;color:#8fa3c8}
.sim-bar{background:#0c1526;border-radius:10px;padding:14px 16px}
.sim-bar .bar-label{display:flex;justify-content:space-between;font-size:12px;color:#8fa3c8;margin-bottom:8px}
.sim-bar .track{height:8px;background:#1a2740;border-radius:5px;overflow:hidden}
.sim-bar .fill{height:100%;background:linear-gradient(90deg,var(--cyan),var(--teal));width:86%;border-radius:5px;animation:load 2s ease}
@keyframes load{from{width:0}}
/* section common */
.section{padding:74px 0}
.section.alt{background:#fff}
.sec-head{text-align:center;max-width:720px;margin:0 auto 48px}
.sec-head .tag{display:inline-block;font-size:13px;font-weight:700;color:var(--cyan);background:rgba(0,212,255,.1);padding:5px 16px;border-radius:18px;margin-bottom:14px}
.sec-head h2{font-size:34px;margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:16px}
/* features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.3s;box-shadow:var(--shadow)}
.feature-card:hover{transform:translateY(-5px);border-color:var(--cyan);box-shadow:0 16px 44px rgba(0,212,255,.16)}
.feature-card .ico{width:54px;height:54px;border-radius:14px;background:linear-gradient(135deg,rgba(0,212,255,.15),rgba(0,230,176,.15));display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.feature-card h3{font-size:19px;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:14.5px}
/* notice */
.notice{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;box-shadow:var(--shadow)}
.notice h3{display:flex;align-items:center;gap:8px;font-size:18px;margin-bottom:14px}
.notice ul{list-style:none}
.notice li{padding:9px 0;border-bottom:1px dashed var(--line);color:var(--muted);font-size:14.5px}
.notice li:last-child{border-bottom:none}
.notice li b{color:var(--orange);margin-right:6px}
.notice li time{color:#9aa8c4;font-size:12.5px;margin-right:10px}
/* trust */
.trust{background:linear-gradient(160deg,#0a1128,#0d1b3e);color:#fff}
.trust .sec-head h2{color:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.trust-item .num{font-size:40px;font-weight:800;background:linear-gradient(90deg,var(--cyan),var(--teal));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.trust-item .lbl{color:#c8d4f0;font-size:15px;margin-top:6px}
/* scenes */
.scenes-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.scene-card{background:var(--soft);border-radius:var(--radius);padding:26px 22px;text-align:center;transition:.3s}
.scene-card:hover{background:#fff;box-shadow:var(--shadow)}
.scene-card .ico{font-size:34px;margin-bottom:12px}
.scene-card h3{font-size:16px;margin-bottom:8px}
.scene-card p{font-size:13.5px;color:var(--muted)}
/* compare */
.compare-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);font-size:14.5px}
.compare-table th,.compare-table td{padding:15px 18px;text-align:center;border-bottom:1px solid var(--line)}
.compare-table thead th{background:var(--navy);color:#fff;font-size:15px}
.compare-table thead th.hl{background:linear-gradient(90deg,var(--cyan),var(--teal));color:#06122b}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table td:first-child{text-align:left;font-weight:600;color:var(--navy)}
.compare-table .yes{color:var(--teal);font-weight:700}
.compare-table .no{color:#c4cede}
.compare-wrap{overflow-x:auto}
/* news tabs */
.news-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:34px;flex-wrap:wrap}
.news-tabs a{padding:9px 22px;border-radius:24px;background:#fff;border:1px solid var(--line);color:var(--muted);font-weight:600;font-size:14.5px}
.news-tabs a.on,.news-tabs a:hover{background:linear-gradient(90deg,var(--cyan),var(--teal));color:#06122b;border-color:transparent}
.news-grid{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;box-shadow:var(--shadow)}
.news-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(10,17,40,.12)}
.news-card img{height:170px;width:100%;object-fit:cover}
.news-card .body{padding:20px}
.news-card .cat{font-size:12px;color:var(--cyan);font-weight:700}
.news-card h3{font-size:16.5px;margin:8px 0;line-height:1.5}
.news-card h3 a{color:var(--navy)}
.news-card h3 a:hover{color:var(--cyan)}
.news-card time{font-size:12.5px;color:#9aa8c4}
/* reviews */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.review-card .stars{color:#ffb400;font-size:15px;letter-spacing:2px;margin-bottom:12px}
.review-card p{color:var(--muted);font-size:14.5px;margin-bottom:18px}
.review-card .who{display:flex;align-items:center;gap:12px}
.review-card .avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--teal));display:flex;align-items:center;justify-content:center;color:#06122b;font-weight:700}
.review-card .who b{display:block;font-size:14.5px}
.review-card .who span{font-size:12.5px;color:#9aa8c4}
/* download */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 18px;text-align:center;transition:.3s;box-shadow:var(--shadow)}
.dl-card:hover{transform:translateY(-5px);border-color:var(--cyan)}
.dl-card .ico{font-size:38px;margin-bottom:12px}
.dl-card h3{font-size:16px;margin-bottom:6px}
.dl-card .ver{font-size:12px;color:#9aa8c4;margin-bottom:16px}
.dl-card .btn{width:100%;padding:10px 0;font-size:14.5px}
/* faq */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow)}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;font-weight:700;color:var(--navy);font-size:16.5px;cursor:pointer}
.faq-q .plus{color:var(--cyan);font-size:22px;font-weight:700}
.faq-a{padding:0 24px 22px;color:var(--muted);font-size:14.5px;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .plus{transform:rotate(45deg)}
/* faq steps */
.steps{list-style:none;counter-reset:st;margin:12px 0}
.steps li{position:relative;padding-left:42px;margin-bottom:12px;counter-increment:st}
.steps li::before{content:counter(st);position:absolute;left:0;top:2px;width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--teal));color:#06122b;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}
/* cta */
.cta{background:linear-gradient(135deg,var(--cyan),var(--teal));color:#06122b;text-align:center;padding:70px 0}
.cta h2{color:#06122b;font-size:34px;margin-bottom:14px}
.cta p{font-size:17px;margin-bottom:28px;opacity:.9}
.cta .btn{background:#06122b;color:#fff!important}
/* footer */
.site-footer{background:#060b18;color:#8fa3c8;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px}
.footer-col a{display:block;color:#8fa3c8;font-size:14px;margin-bottom:10px}
.footer-col a:hover{color:var(--cyan)}
.footer-brand p{font-size:13.5px;margin-top:14px;max-width:300px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:13px}
.footer-bottom a{color:#8fa3c8}
/* breadcrumb */
.breadcrumb{background:#fff;border-bottom:1px solid var(--line);padding:16px 0;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{margin:0 8px;color:#c4cede}
.breadcrumb .cur{color:var(--navy);font-weight:600}
/* page hero small */
.page-hero{background:linear-gradient(160deg,#0a1128,#0d1b3e);color:#fff;padding:56px 0}
.page-hero h1{color:#fff;font-size:34px;margin-bottom:12px}
.page-hero p{color:#c8d4f0;font-size:16px;max-width:720px}
/* article */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;padding:50px 0}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.article-main h1{font-size:30px;margin:14px 0}
.article-meta{display:flex;gap:18px;color:#9aa8c4;font-size:13.5px;margin-bottom:22px;flex-wrap:wrap}
.article-main .cover{border-radius:12px;margin-bottom:26px}
.article-main h2{font-size:22px;margin:32px 0 14px;padding-left:14px;border-left:4px solid var(--cyan)}
.article-main p{margin-bottom:16px;color:#33415f;font-size:15.5px}
.article-main table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article-main table th,.article-main table td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-main table th{background:var(--soft);color:var(--navy)}
.article-main figure{margin:20px 0}
.article-main figure img{border-radius:12px;width:100%}
.article-main figcaption{font-size:13px;color:#9aa8c4;text-align:center;margin-top:8px}
.article-main blockquote{border-left:4px solid var(--cyan);background:var(--soft);padding:16px 20px;margin:20px 0;color:var(--navy);font-style:italic}
.article-nav{display:flex;justify-content:space-between;gap:14px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line);font-size:14px}
.sidebar h4{font-size:17px;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--cyan)}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:24px;box-shadow:var(--shadow)}
.side-card ul{list-style:none}
.side-card ul li{margin-bottom:12px;font-size:14px}
.side-card ul li a{color:var(--navy)}
.side-card ul li a:hover{color:var(--cyan)}
.side-card .cat-list li a{display:flex;justify-content:space-between;color:var(--muted)}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.related .news-card img{height:130px}
/* toc */
.toc{background:var(--soft);border-radius:12px;padding:18px 22px;margin-bottom:26px}
.toc h4{font-size:14px;color:var(--navy);margin-bottom:10px}
.toc ol{margin-left:20px;font-size:14px}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--cyan)}
/* responsive */
@media(max-width:960px){
.hero .container{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px}
.features-grid,.scenes-grid,.news-grid,.reviews-grid,.dl-grid,.related{grid-template-columns:repeat(2,1fr)}
.trust-grid{grid-template-columns:repeat(2,1fr)}
.article-layout{grid-template-columns:1fr}
.nav{display:none}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
.features-grid,.scenes-grid,.news-grid,.reviews-grid,.dl-grid,.trust-grid,.related,.footer-grid{grid-template-columns:1fr}
.hero h1{font-size:32px}
.sec-head h2{font-size:26px}
.article-main{padding:24px}
.sim-stats{grid-template-columns:1fr}
}