:root{--bg:#0a1024;--bg2:#0e1730;--card:#141e3a;--card2:#182545;--line:#243254;--txt:#e6ecf7;--muted:#9aa8c7;--cy:#22d3ee;--te:#14b8a6;--grad:linear-gradient(135deg,#22d3ee 0%,#14b8a6 100%);--warn:#f59e0b;--ok:#34d399;--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,sans-serif;background:var(--bg);color:var(--txt);line-height:1.7;-webkit-font-smoothing:antialiased;font-size:16px}
a{color:var(--cy);text-decoration:none;transition:.2s}
a:hover{color:#7de5f8}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section.alt{background:var(--bg2)}
.section-head{text-align:center;margin-bottom:44px}
.section-head .kicker{display:inline-block;font-size:13px;letter-spacing:2px;text-transform:uppercase;color:var(--cy);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.25);padding:5px 14px;border-radius:30px;margin-bottom:14px}
.section-head h2{font-size:34px;font-weight:800;line-height:1.25}
.section-head h2 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-head p{color:var(--muted);margin-top:12px;max-width:720px;margin-left:auto;margin-right:auto}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#04121c;font-weight:700;padding:14px 30px;border-radius:40px;font-size:16px;box-shadow:0 8px 24px rgba(20,184,166,.35)}
.btn:hover{color:#04121c;transform:translateY(-2px);box-shadow:0 12px 30px rgba(20,184,166,.5)}
.btn.ghost{background:transparent;color:var(--cy);border:1px solid rgba(34,211,238,.4);box-shadow:none}
.btn.ghost:hover{background:rgba(34,211,238,.08);transform:translateY(-2px)}
.btn.sm{padding:10px 20px;font-size:14px}
/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,16,36,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--txt)}
.logo img{width:34px;height:34px;border-radius:8px}
.logo em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;gap:26px;align-items:center}
.nav a{color:var(--muted);font-size:15px;font-weight:500}
.nav a:hover,.nav a.active{color:var(--cy)}
.nav .nav-btn{margin-left:8px}
/* hero */
.hero{padding:80px 0 64px;background:radial-gradient(1200px 500px at 80% -10%,rgba(34,211,238,.18),transparent),radial-gradient(800px 400px at 10% 10%,rgba(20,184,166,.12),transparent)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:46px;font-weight:900;line-height:1.18;letter-spacing:-.5px}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{color:var(--muted);font-size:18px;margin:20px 0 20px;max-width:520px}
.selling{list-style:none;margin:0 0 26px;padding:0}
.selling li{display:flex;align-items:baseline;gap:10px;color:#c8d3e8;font-size:15px;margin-bottom:10px}
.selling li::before{content:"✓";color:var(--cy);font-weight:800;flex-shrink:0}
.selling li strong{color:var(--txt)}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:36px;flex-wrap:wrap}
.hero-stats .stat b{font-size:28px;font-weight:800;display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .stat span{color:var(--muted);font-size:13px}
/* client simulator */
.simulator{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:0 30px 80px rgba(0,0,0,.5);overflow:hidden}
.sim-top{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--card2);border-bottom:1px solid var(--line)}
.sim-top .dot{width:12px;height:12px;border-radius:50%}
.sim-top .dot.r{background:#f87171}.sim-top .dot.y{background:#fbbf24}.sim-top .dot.g{background:#34d399}
.sim-top .bar{flex:1;margin-left:8px;height:26px;background:var(--bg);border-radius:6px;display:flex;align-items:center;padding:0 10px;color:var(--muted);font-size:12px}
.sim-body{padding:22px}
.sim-status{display:flex;align-items:center;justify-content:space-between;background:var(--bg2);border-radius:12px;padding:16px 18px;margin-bottom:16px}
.sim-status .lbl{display:flex;align-items:center;gap:10px}
.sim-status .lbl .ring{width:16px;height:16px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(52,211,153,.2);animation:pulse 2s infinite}
.sim-status b{font-size:18px}
.sim-status .loc{color:var(--muted);font-size:13px}
.sim-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.sim-meta .box{background:var(--bg2);border-radius:10px;padding:12px;text-align:center}
.sim-meta .box b{font-size:18px;display:block;color:var(--cy)}
.sim-meta .box span{font-size:12px;color:var(--muted)}
.sim-list{display:flex;flex-direction:column;gap:8px}
.sim-list .node{display:flex;align-items:center;gap:10px;background:var(--bg2);border-radius:10px;padding:10px 14px;font-size:14px}
.sim-list .node .flag{font-size:18px}
.sim-list .node .ms{margin-left:auto;color:var(--ok);font-size:13px}
.sim-list .node.act{border:1px solid rgba(34,211,238,.4);background:rgba(34,211,238,.06)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
/* announcement */
.notice{background:linear-gradient(135deg,rgba(245,158,11,.12),rgba(245,158,11,.04));border:1px solid rgba(245,158,11,.3);border-radius:14px;padding:18px 22px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.notice .badge{background:var(--warn);color:#0a1024;font-weight:700;font-size:12px;padding:4px 12px;border-radius:20px}
.notice p{color:var(--txt);flex:1;min-width:240px}
/* features grid */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{transform:translateY(-5px);border-color:rgba(34,211,238,.4);box-shadow:0 18px 40px rgba(0,0,0,.4)}
.card .ic{width:50px;height:50px;border-radius:12px;background:rgba(34,211,238,.12);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}
/* compare table */
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line)}
table.cmp{width:100%;border-collapse:collapse;min-width:640px;background:var(--card)}
table.cmp th,table.cmp td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
table.cmp th{background:var(--card2);font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
table.cmp td:first-child{font-weight:600}
table.cmp .yes{color:var(--ok);font-weight:700}
table.cmp .no{color:var(--muted)}
table.cmp .hl{background:rgba(34,211,238,.06)}
table.cmp .hl td:first-child{color:var(--cy)}
/* news tabs (pure CSS) */
.tabs{position:relative}
.tabs input{display:none}
.tabs-nav{display:flex;gap:8px;justify-content:center;margin-bottom:28px;flex-wrap:wrap}
.tabs-nav label{cursor:pointer;padding:10px 22px;border-radius:30px;background:var(--card);border:1px solid var(--line);color:var(--muted);font-size:14px;font-weight:600;transition:.2s}
.tabs input:checked+label{background:var(--grad);color:#04121c;border-color:transparent}
.tabs-panel{display:none}
.tabs input#t1:checked~.panels .p1,.tabs input#t2:checked~.panels .p2,.tabs input#t3:checked~.panels .p3{display:grid}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.news-item:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4)}
.news-item .thumb{height:150px;background:linear-gradient(135deg,#1e3a5f,#0e7490);display:flex;align-items:center;justify-content:center;font-size:42px}
.news-item .cnt{padding:18px}
.news-item .cat{font-size:12px;color:var(--cy);font-weight:600}
.news-item h3{font-size:16px;margin:8px 0;line-height:1.45}
.news-item h3 a{color:var(--txt)}
.news-item h3 a:hover{color:var(--cy)}
.news-item .date{color:var(--muted);font-size:12px}
/* reviews */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.review .stars{color:#fbbf24;font-size:16px;margin-bottom:12px}
.review p{color:var(--muted);font-size:14.5px;min-height:66px}
.review .who{display:flex;align-items:center;gap:10px;margin-top:16px}
.review .who .av{width:38px;height:38px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:700;color:#04121c}
.review .who b{font-size:14px;display:block}
.review .who span{font-size:12px;color:var(--muted)}
/* download */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.25s}
.dl-item:hover{transform:translateY(-5px);border-color:rgba(34,211,238,.4)}
.dl-item .ic{font-size:40px;margin-bottom:12px}
.dl-item h3{font-size:16px;margin-bottom:6px}
.dl-item p{color:var(--muted);font-size:12.5px;margin-bottom:16px}
.dl-item a.btn{display:block;width:100%}
/* trust */
.trust{display:flex;gap:24px;justify-content:center;flex-wrap:wrap}
.trust .t-item{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 22px}
.trust .t-item .ic{font-size:26px}
.trust .t-item b{font-size:15px;display:block}
.trust .t-item span{font-size:12px;color:var(--muted)}
/* scenarios */
.sc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sc-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.sc-item .ic{font-size:32px;margin-bottom:12px}
.sc-item h3{font-size:18px;margin-bottom:8px}
.sc-item p{color:var(--muted);font-size:14px}
/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
details.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
details.faq summary{cursor:pointer;list-style:none;padding:20px 24px;font-weight:700;font-size:16px;display:flex;justify-content:space-between;align-items:center}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-size:24px;color:var(--cy);transition:.2s}
details.faq[open] summary::after{content:"−";transform:rotate(180deg)}
details.faq .ans{padding:0 24px 22px;color:var(--muted);font-size:14.5px}
details.faq .ans ol{padding-left:20px;margin-top:10px}
details.faq .ans ol li{margin-bottom:8px}
/* CTA */
.cta{background:var(--grad);border-radius:24px;padding:56px 40px;text-align:center;color:#04121c}
.cta h2{font-size:32px;font-weight:900;margin-bottom:14px}
.cta p{font-size:16px;opacity:.85;margin-bottom:28px}
.cta .btn{background:#04121c;color:#fff}
.cta .btn:hover{color:#fff}
/* footer */
.site-footer{background:#070d1f;border-top:1px solid var(--line);padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-grid .f-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;margin-bottom:12px}
.footer-grid .f-logo img{width:28px;height:28px;border-radius:6px}
.footer-grid p{color:var(--muted);font-size:13.5px}
.footer-grid h4{font-size:14px;margin-bottom:14px;color:var(--txt)}
.footer-grid ul{list-style:none}
.footer-grid ul li{margin-bottom:8px}
.footer-grid ul a{color:var(--muted);font-size:13.5px}
.footer-grid ul a:hover{color:var(--cy)}
.friend-links{margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}
.friend-links h4{font-size:14px;margin-bottom:12px}
.friend-links .flinks{display:flex;flex-wrap:wrap;gap:10px 18px}
.friend-links .flinks a{color:var(--muted);font-size:13px;display:inline-flex;align-items:center;gap:6px}
.friend-links .flinks a::before{content:"🔗";font-size:11px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:12.5px}
.footer-bottom a{color:var(--muted)}
/* breadcrumb */
.breadcrumb{background:var(--bg2);border-bottom:1px solid var(--line);padding:14px 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb li+li::before{content:"›";margin-right:8px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cy)}
/* page hero (subpages) */
.page-hero{padding:56px 0 40px;background:radial-gradient(900px 400px at 50% -10%,rgba(34,211,238,.14),transparent)}
.page-hero h1{font-size:38px;font-weight:900;text-align:center}
.page-hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero .sub{color:var(--muted);text-align:center;margin-top:12px}
/* article */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.article-body{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:36px}
.article-body h1{font-size:30px;font-weight:900;line-height:1.3;margin-bottom:16px}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:13px;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-meta .cat{color:var(--cy);font-weight:600}
.article-body h2{font-size:22px;margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--cy)}
.article-body h3{font-size:18px;margin:22px 0 10px}
.article-body p{color:#c8d3e8;margin-bottom:16px;line-height:1.85}
.article-body .lead{font-size:17px;color:var(--txt);background:var(--bg2);border-left:3px solid var(--cy);padding:16px 18px;border-radius:8px;margin-bottom:24px}
.article-body ul,.article-body ol{padding-left:22px;margin-bottom:16px;color:#c8d3e8}
.article-body li{margin-bottom:8px}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.article-body table th,.article-body table td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body table th{background:var(--bg2);color:var(--cy)}
.article-body .figure{background:var(--bg2);border-radius:12px;padding:24px;text-align:center;margin:20px 0;border:1px dashed var(--line)}
.article-body .figure .emoji{font-size:48px}
.article-body .figcap{color:var(--muted);font-size:12.5px;margin-top:10px}
.article-nav{display:flex;justify-content:space-between;gap:14px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line);flex-wrap:wrap}
.article-nav a{font-size:14px}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:20px}
.side-card h4{font-size:15px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.side-card ul{list-style:none}
.side-card ul li{margin-bottom:10px}
.side-card ul a{font-size:13.5px;color:var(--muted);line-height:1.4;display:block}
.side-card ul a:hover{color:var(--cy)}
.side-card .hot-num{color:var(--cy);font-weight:700;margin-right:6px}
/* comments */
.comments{margin-top:30px}
.comments h3{font-size:19px;margin-bottom:16px}
.comment{background:var(--bg2);border-radius:12px;padding:16px 18px;margin-bottom:12px}
.comment .c-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.comment .c-head .av{width:32px;height:32px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:700;color:#04121c;font-size:13px}
.comment .c-head b{font-size:14px;display:block}
.comment .c-head span{font-size:12px;color:var(--muted)}
.comment p{font-size:14px;color:#c8d3e8}
/* sitemap */
.sitemap-links{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sitemap-links .sm-group h3{font-size:17px;margin-bottom:12px;color:var(--cy)}
.sitemap-links ul{list-style:none}
.sitemap-links ul li{margin-bottom:8px}
.sitemap-links ul a{color:var(--muted);font-size:14px}
/* 404 */
.error-page{text-align:center;padding:120px 0}
.error-page .code{font-size:120px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.error-page h1{font-size:28px;margin:20px 0 12px}
.error-page p{color:var(--muted);margin-bottom:28px}
/* tags/badges */
.tag{display:inline-block;font-size:12px;padding:3px 10px;border-radius:20px;background:rgba(34,211,238,.1);color:var(--cy);border:1px solid rgba(34,211,238,.25);margin:2px}
/* responsive */
@media(max-width:960px){.hero-grid{grid-template-columns:1fr}.grid3,.news-grid,.reviews-grid,.sc-grid{grid-template-columns:1fr 1fr}.dl-grid{grid-template-columns:1fr 1fr 1fr}.article-layout{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.sitemap-links{grid-template-columns:1fr 1fr}.hero h1{font-size:34px}}
@media(max-width:600px){.grid3,.news-grid,.reviews-grid,.sc-grid,.dl-grid,.footer-grid,.sitemap-links{grid-template-columns:1fr}.hero h1{font-size:28px}.section{padding:48px 0}.section-head h2{font-size:26px}.nav{display:none}.article-body{padding:22px}}