:root{--c:#2E7CF6;--c2:#21D4FD;--cd:#1B4FBE;--ink:#0d1b34;--tx:#3c4a63;--mut:#7c88a1;--bg:#f6f9ff;--card:#fff;--line:#e7edf8;--grad:linear-gradient(135deg,#2E7CF6 0%,#21D4FD 100%);--grad2:linear-gradient(135deg,#1B4FBE 0%,#2E7CF6 60%,#21D4FD 100%);--rad:18px;--sh:0 20px 50px -18px rgba(30,64,140,.28);--sh2:0 10px 30px -12px rgba(30,64,140,.18)}
*{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",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 56px}
.sec-head .tag{display:inline-block;padding:6px 16px;border-radius:999px;background:rgba(46,124,246,.1);color:var(--c);font-size:13px;font-weight:700;letter-spacing:.5px;margin-bottom:16px}
.sec-head h2{font-size:38px;line-height:1.25;font-weight:800;letter-spacing:-.5px}
.sec-head p{color:var(--mut);font-size:16px;margin-top:14px}
.grad-text{color:var(--c);background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 30px;border-radius:12px;font-size:16px;font-weight:700;transition:.28s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 28px -10px rgba(46,124,246,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px -10px rgba(46,124,246,.85)}
.btn-ghost{background:transparent;color:var(--c);border:2px solid rgba(46,124,246,.5)}
.btn-ghost:hover{background:rgba(46,124,246,.08);border-color:var(--c)}
.btn-white{background:#fff;color:var(--c);box-shadow:var(--sh2)}
.btn-white:hover{transform:translateY(-2px)}
.btn-lg{padding:17px 38px;font-size:17px;border-radius:14px}
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:.3s;padding:18px 0}
.nav.scrolled{background:rgba(13,27,52,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:10px 0;box-shadow:0 8px 30px -12px rgba(0,0,0,.4)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff}
.nav-logo img{width:38px;height:38px;border-radius:10px}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:5px;padding:10px 14px;color:#fff;font-size:15px;font-weight:600;border-radius:10px;transition:.2s;opacity:.92}
.nav-link:hover{background:rgba(255,255,255,.12);opacity:1}
.nav-link .arrow{font-size:11px;transition:.25s;transform:rotate(0)}
.has-dropdown:hover .nav-link .arrow,.has-dropdown.open .nav-link .arrow{transform:rotate(180deg)}
.dropdown{position:absolute;top:100%;left:0;min-width:210px;background:#fff;border-radius:14px;box-shadow:0 24px 60px -20px rgba(0,0,0,.35);padding:10px;opacity:0;visibility:hidden;transform:translateY(12px);transition:.25s;z-index:50}
.has-dropdown:hover .dropdown,.has-dropdown.open .dropdown{opacity:1;visibility:visible;transform:translateY(4px)}
.dropdown a{display:block;padding:10px 14px;color:var(--ink);font-size:14px;font-weight:500;border-radius:10px;transition:.18s}
.dropdown a:hover{background:#f0f5ff;color:var(--c)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-burger{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:8px}
.nav-burger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.hero{position:relative;padding:170px 0 100px;background:var(--grad2);overflow:hidden;color:#fff}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(33,212,253,.35),transparent 45%),radial-gradient(circle at 10% 90%,rgba(46,124,246,.4),transparent 40%)}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-title{font-size:52px;line-height:1.15;font-weight:900;letter-spacing:-1px}
.hero-title em{font-style:normal;color:#bce9ff;background:linear-gradient(120deg,#fff,#bce9ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{margin:22px 0 30px;font-size:19px;color:rgba(255,255,255,.9);max-width:540px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:44px}
.hero-stats .st b{display:block;font-size:32px;font-weight:900}
.hero-stats .st span{font-size:14px;color:rgba(255,255,255,.78)}
.hero-stats .st{position:relative}
.hero-stats .st+.st::before{content:"";position:absolute;left:-20px;top:8px;bottom:8px;width:1px;background:rgba(255,255,255,.25)}
.sim{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(10px);border-radius:22px;padding:18px;box-shadow:0 30px 80px -30px rgba(0,0,0,.55);max-width:380px;margin-left:auto}
.sim-cover{position:relative;border-radius:14px;overflow:hidden;aspect-ratio:4/3;min-height:200px;background:linear-gradient(135deg,#0b2d66,#2E7CF6 50%,#21D4FD)}
.sim-cover .disc{position:absolute;right:16px;top:16px;width:76px;height:76px;border-radius:50%;background:radial-gradient(circle,#1a1a1a 0 18%,#0d0d0d 18% 22%,#222 22% 100%);border:3px solid rgba(255,255,255,.2);animation:spin 12s linear infinite}
.sim-cover .disc::after{content:"";position:absolute;inset:38%;border-radius:50%;background:#21D4FD;box-shadow:0 0 20px rgba(33,212,253,.8)}
.sim-cover .disc.paused{animation-play-state:paused}
@keyframes spin{to{transform:rotate(360deg)}}
.sim-cover .label{position:absolute;left:14px;bottom:12px;color:#fff;font-size:12px;background:rgba(0,0,0,.35);padding:5px 12px;border-radius:999px}
.sim-body{margin-top:14px}
.sim-track{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px}
.sim-track b{font-size:16px;color:#fff}
.sim-track span{font-size:12px;color:rgba(255,255,255,.7)}
.sim-bar{height:6px;background:rgba(255,255,255,.2);border-radius:99px;overflow:hidden;cursor:pointer}
.sim-bar i{display:block;height:100%;width:0;background:var(--grad);border-radius:99px;transition:.3s}
.sim-time{display:flex;justify-content:space-between;font-size:12px;color:rgba(255,255,255,.65);margin-top:6px}
.sim-ctrl{display:flex;align-items:center;justify-content:center;gap:13px;margin-top:11px}
.sim-btn{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.15);color:#fff;transition:.2s;font-size:16px}
.sim-btn:hover{background:rgba(255,255,255,.3)}
.sim-btn.play{width:52px;height:52px;background:var(--grad);font-size:21px;box-shadow:0 12px 30px -8px rgba(33,212,253,.8)}
.sim-list{margin-top:13px;border-top:1px solid rgba(255,255,255,.16);padding-top:9px}
.sim-list .row{display:flex;align-items:center;gap:10px;padding:6px 10px;border-radius:9px;color:#fff;cursor:pointer;transition:.2s;font-size:13px}
.sim-list .row:hover,.sim-list .row.on{background:rgba(255,255,255,.12)}
.sim-list .row .no{width:24px;color:rgba(255,255,255,.6)}
.sim-list .row .tt{flex:1}
.sim-list .row .dur{color:rgba(255,255,255,.6);font-size:12px}
.cards-grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g6{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:30px;transition:.28s}
.card:hover{transform:translateY(-6px);box-shadow:var(--sh);border-color:transparent}
.icon-box{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,rgba(46,124,246,.12),rgba(33,212,253,.12));display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--c);margin-bottom:18px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--mut);font-size:15px}
.step-num{font-size:13px;font-weight:800;color:var(--c);letter-spacing:1px}
.nodes{background:linear-gradient(180deg,#0d1b34,#123066);color:#fff}
.nodes .sec-head h2{color:#fff}
.nodes .sec-head p{color:rgba(255,255,255,.65)}
.node-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:48px}
.node-stat{text-align:center;padding:26px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:16px}
.node-stat b{display:block;font-size:34px;font-weight:900;color:#21D4FD;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.node-stat span{font-size:14px;color:rgba(255,255,255,.7)}
.node-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.node-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:20px;transition:.25s;cursor:default}
.node-card:hover{background:rgba(255,255,255,.12);transform:translateY(-4px)}
.node-card b{font-size:16px;color:#fff}
.node-card span{display:block;font-size:13px;color:rgba(255,255,255,.62);margin-top:4px}
.node-card .ping{display:inline-block;margin-top:8px;font-size:11px;color:#35e0a0;background:rgba(53,224,160,.15);padding:2px 10px;border-radius:999px}
.tech-tags{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.tech-tag{display:flex;align-items:center;gap:8px;padding:13px 22px;background:#fff;border:1px solid var(--line);border-radius:999px;font-weight:700;color:var(--ink);box-shadow:var(--sh2);transition:.25s}
.tech-tag:hover{transform:translateY(-3px);border-color:var(--c);color:var(--c)}
.tech-tag .dot{width:8px;height:8px;border-radius:50%;background:var(--grad)}
#pricing .popular{position:relative;border:2px solid var(--c);transform:scale(1.03);box-shadow:var(--sh);z-index:2}
.price-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:800;padding:5px 18px;border-radius:999px;white-space:nowrap}
.price-card{text-align:left;display:flex;flex-direction:column}
.price-card .pname{font-size:18px;font-weight:800}
.price-card .amount{font-size:42px;font-weight:900;margin:16px 0 4px}
.price-card .amount small{font-size:16px;color:var(--mut);font-weight:600}
.price-card .pdesc{color:var(--mut);font-size:14px;margin-bottom:18px}
.price-list{margin-bottom:24px;flex:1}
.price-list li{display:flex;align-items:center;gap:10px;padding:8px 0;font-size:15px;color:var(--tx)}
.price-list li::before{content:"✓";display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:50%;background:rgba(46,124,246,.15);color:var(--c);font-weight:800;font-size:12px;flex:none}
.faq{max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;padding:20px 24px;font-size:17px;font-weight:700;color:var(--ink)}
.faq-q .ic{transition:.3s;color:var(--c);font-size:22px;font-weight:300;flex:none}
.faq-item.open .faq-q .ic{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:.35s}
.faq-item.open .faq-a{max-height:1000px}
.faq-a-inner{padding:0 24px 24px;color:var(--mut);font-size:15px}
.faq-a-inner ol{margin-left:20px;padding-left:0}
.faq-a-inner ol li{margin-bottom:8px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;transition:.28s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--sh)}
.news-card .thumb{aspect-ratio:16/9;overflow:hidden}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.5s}
.news-card:hover .thumb img{transform:scale(1.06)}
.news-card .body{padding:22px;display:flex;flex-direction:column;flex:1}
.news-card .meta{font-size:12px;color:var(--mut);display:flex;gap:12px;margin-bottom:8px}
.news-card h3{font-size:17px;margin-bottom:8px;line-height:1.45}
.news-card p{color:var(--mut);font-size:14px;flex:1}
.news-card .more{color:var(--c);font-weight:700;font-size:14px;margin-top:14px}
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi-card{background:#fff;border:1px solid var(--line);border-radius:var(--rad);padding:30px}
.testi-stars{color:#ffb400;letter-spacing:2px;margin-bottom:14px;font-size:16px}
.testi-card p{color:var(--tx);font-size:15px;margin-bottom:20px}
.testi-user{display:flex;align-items:center;gap:14px}
.testi-avatar{width:48px;height:48px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px}
.testi-user b{display:block;font-size:15px}
.testi-user span{font-size:13px;color:var(--mut)}
.cta{position:relative;background:var(--grad2);color:#fff;text-align:center;padding:100px 0;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 0,rgba(33,212,253,.35),transparent 50%)}
.cta .container{position:relative}
.cta h2{font-size:42px;font-weight:900;letter-spacing:-.5px}
.cta p{font-size:18px;color:rgba(255,255,255,.85);margin:18px 0 34px}
.footer{background:#0a1629;color:rgba(255,255,255,.72);padding:70px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer .brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:20px;margin-bottom:14px}
.footer .brand img{width:36px;height:36px;border-radius:9px}
.footer p{font-size:14px;line-height:1.8}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{display:block;font-size:14px;padding:6px 0;transition:.2s}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:13px;color:rgba(255,255,255,.5)}
.dl-hero{padding:170px 0 90px;background:var(--grad2);color:#fff;position:relative;overflow:hidden}
.dl-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(33,212,253,.35),transparent 45%)}
.dl-hero .container{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.dl-stats{display:flex;gap:28px;margin-top:30px;flex-wrap:wrap}
.dl-stats .ds b{display:block;font-size:24px;font-weight:900}
.dl-stats .ds span{font-size:13px;color:rgba(255,255,255,.75)}
.ver-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ver-card{background:#fff;border:1px solid var(--line);border-radius:var(--rad);padding:30px;display:flex;flex-direction:column}
.ver-card .vn{font-size:22px;font-weight:900}
.ver-card .vs{color:var(--mut);font-size:13px;margin:6px 0 18px}
.ver-card ul{margin-bottom:22px;flex:1}
.ver-card ul li{padding:7px 0;font-size:14px;color:var(--tx);padding-left:22px;position:relative}
.ver-card ul li::before{content:"✓";position:absolute;left:0;color:var(--c);font-weight:800}
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.req-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;gap:14px;align-items:flex-start}
.req-item .ico{font-size:22px;flex:none;width:44px;height:44px;border-radius:12px;background:rgba(46,124,246,.1);display:flex;align-items:center;justify-content:center}
.req-item b{display:block;font-size:15px;margin-bottom:3px}
.req-item span{font-size:13px;color:var(--mut)}
.page-hero{background:var(--grad2);color:#fff;padding:150px 0 70px;text-align:center;position:relative;overflow:hidden}
.page-hero h1{font-size:44px;font-weight:900}
.page-hero p{color:rgba(255,255,255,.85);margin-top:12px;font-size:17px}
.breadcrumb{font-size:14px;color:var(--mut);margin:26px 0;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--c)}
.article{max-width:820px;margin:0 auto}
.article .art-meta{display:flex;gap:16px;color:var(--mut);font-size:14px;margin:18px 0 28px;flex-wrap:wrap}
.article .art-cover{border-radius:20px;overflow:hidden;margin-bottom:32px}
.article h2{font-size:26px;margin:36px 0 16px;font-weight:800}
.article p{color:var(--tx);font-size:16px;margin-bottom:18px}
.article .art-img{border-radius:16px;overflow:hidden;margin:24px 0}
.article .art-img figcaption{font-size:13px;color:var(--mut);text-align:center;padding:10px}
.art-nav{display:flex;justify-content:space-between;gap:16px;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.art-nav a{flex:1;padding:16px 20px;background:#fff;border:1px solid var(--line);border-radius:14px;font-size:14px;transition:.2s}
.art-nav a:hover{border-color:var(--c);color:var(--c)}
.art-nav a.next{text-align:right}
.art-nav span{display:block;font-size:12px;color:var(--mut);margin-bottom:4px}
.sitemap{max-width:900px;margin:0 auto}
.sitemap .sm-col{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.sitemap h3{font-size:18px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--c);display:inline-block}
.sitemap a{display:block;padding:8px 0;color:var(--tx);font-size:15px;transition:.2s}
.sitemap a:hover{color:var(--c);padding-left:6px}
.err404{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;background:var(--grad2);color:#fff;padding:40px}
.err404 .code{font-size:140px;font-weight:900;line-height:1;color:#bce9ff;background:linear-gradient(120deg,#fff,#bce9ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.err404 h1{font-size:28px;margin:20px 0 10px}
.err404 p{color:rgba(255,255,255,.85);font-size:17px;margin-bottom:30px}
.err404 .count{display:inline-block;font-weight:900;color:#fff;background:rgba(255,255,255,.15);padding:4px 12px;border-radius:8px;margin:0 4px}
@media(max-width:992px){
.nav-menu{position:fixed;top:0;right:-100%;width:300px;height:100vh;background:#0d1b34;flex-direction:column;align-items:stretch;padding:90px 22px 30px;gap:4px;transition:.35s;overflow-y:auto;box-shadow:-20px 0 60px rgba(0,0,0,.4)}
.nav-menu.open{right:0}
.nav-link{justify-content:space-between;padding:14px 10px;font-size:16px}
.nav-burger{display:flex}
.nav-actions .btn-ghost{display:none}
.dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:rgba(255,255,255,.06);margin:0 0 6px;display:none}
.has-dropdown.open .dropdown{display:block}
.dropdown a{color:#fff;padding:12px 16px}
.dropdown a:hover{background:rgba(255,255,255,.1);color:#fff}
.hero .container,.dl-hero .container{grid-template-columns:1fr;gap:40px}
.sim{max-width:460px;margin:0 auto}
.hero-title{font-size:40px}
.g3,.g6,.news-grid,.testi-grid,.ver-grid,.req-grid{grid-template-columns:repeat(2,1fr)}
.node-grid{grid-template-columns:repeat(3,1fr)}
.node-stats{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
.section{padding:60px 0}
.sec-head h2{font-size:30px}
.hero{padding:130px 0 70px}
.hero-title{font-size:32px}
.hero-stats{gap:24px}
.g3,.g6,.news-grid,.testi-grid,.ver-grid,.req-grid{grid-template-columns:1fr}
.node-grid{grid-template-columns:repeat(2,1fr)}
#pricing .popular{transform:none}
.cta h2{font-size:30px}
.page-hero h1{font-size:34px}
.sitemap .sm-col{grid-template-columns:1fr}
}
@media(max-width:480px){
.container{padding:0 16px}
.hero-title{font-size:28px}
.hero-sub{font-size:16px}
.btn-lg{padding:15px 26px;font-size:16px}
.hero-stats{flex-direction:column;gap:16px}
.hero-stats .st+.st::before{display:none}
.node-grid{grid-template-columns:1fr 1fr}
.node-stats{grid-template-columns:1fr}
.sec-head h2{font-size:26px}
.sim{padding:15px}
}