:root{--c1:#4f46e5;--c2:#7c3aed;--c3:#0ea5e9;--dark:#0b1220;--dark2:#111a2e;--txt:#1e293b;--muted:#64748b;--line:#e2e8f0;--bg:#f6f8fc;--card:#ffffff;--grad:linear-gradient(135deg,#4f46e5 0%,#7c3aed 55%,#0ea5e9 100%);--shadow:0 10px 30px rgba(15,23,42,.08);--shadow-lg:0 24px 60px rgba(79,70,229,.18);--r:16px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--txt);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}ul{list-style:none}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}.section{padding:88px 0}.section-tag{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--c1);background:rgba(79,70,229,.08);padding:6px 14px;border-radius:999px;margin-bottom:18px}.section-title{font-size:38px;font-weight:800;line-height:1.25;color:var(--dark);letter-spacing:-.01em}.section-sub{font-size:17px;color:var(--muted);margin-top:14px;max-width:640px}.center{text-align:center}.center .section-sub{margin-left:auto;margin-right:auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:12px;padding:14px 28px;font-size:15px;cursor:pointer;border:none;transition:.25s;white-space:nowrap}.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(79,70,229,.32)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(79,70,229,.42)}.btn-ghost{background:transparent;color:var(--dark);border:1.5px solid var(--line)}.btn-ghost:hover{border-color:var(--c1);color:var(--c1)}.btn-lg{padding:17px 34px;font-size:16px;border-radius:14px}.btn-sm{padding:10px 20px;font-size:14px;border-radius:10px}.ghost-white{border-color:rgba(255,255,255,.4);color:#fff}.ghost-white:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.1)}.grid{display:grid;gap:24px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-6{grid-template-columns:repeat(6,1fr)}.card{background:var(--card);border-radius:var(--r);border:1px solid var(--line);box-shadow:var(--shadow);transition:.3s}.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}.ico{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;color:#fff;background:var(--grad);flex:none}
/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;padding:18px 0;transition:.35s;background:transparent}.nav.scrolled{background:rgba(11,18,32,.82);backdrop-filter:blur(16px);box-shadow:0 6px 24px rgba(0,0,0,.18);padding:12px 0}.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff}.nav-logo img{width:34px;height:34px;border-radius:8px}.nav-menu{display:flex;align-items:center;gap:6px}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:6px;color:rgba(255,255,255,.88);font-weight:600;font-size:15px;padding:10px 14px;border-radius:10px;cursor:pointer;transition:.2s}.nav-link:hover{color:#fff;background:rgba(255,255,255,.1)}.nav-link .arr{display:inline-block;transition:.25s;font-size:11px}.nav-item:hover .arr{transform:rotate(180deg)}.dropdown{position:absolute;top:calc(100% + 10px);left:0;min-width:230px;background:#fff;border-radius:14px;box-shadow:0 24px 60px rgba(15,23,42,.16);padding:8px;opacity:0;visibility:hidden;transform:translateY(10px);transition:.25s}.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}.dropdown a{display:block;padding:10px 14px;border-radius:10px;color:var(--txt);font-size:14px;font-weight:500;transition:.15s}.dropdown a:hover{background:var(--bg);color:var(--c1)}.nav-cta{display:flex;align-items:center;gap:12px}.nav-burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;z-index:1001}.nav-burger span{width:26px;height:2.5px;background:#fff;border-radius:3px;transition:.3s}.nav-burger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}.nav-burger.open span:nth-child(2){opacity:0}.nav-burger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
/* hero */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,rgba(124,58,237,.35),transparent 60%),radial-gradient(1000px 500px at 0% 20%,rgba(14,165,233,.25),transparent 55%),linear-gradient(160deg,#0b1220 0%,#111a2e 60%,#0b1220 100%);color:#fff;padding:150px 0 100px;overflow:hidden}.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}.hero h1{font-size:52px;font-weight:800;line-height:1.15;letter-spacing:-.02em}.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero .sell{font-size:19px;color:rgba(255,255,255,.82);margin:22px 0 30px;max-width:540px}.hero-actions{display:flex;gap:16px;flex-wrap:wrap}.hero-stats{display:flex;gap:36px;margin-top:42px}.hero-stats .st{display:flex;flex-direction:column}.hero-stats .st b{font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-stats .st span{font-size:13px;color:rgba(255,255,255,.65);margin-top:4px}
/* simulator */
.sim{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:20px;backdrop-filter:blur(10px);overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.35)}.sim-head{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.12)}.sim-head i{width:12px;height:12px;border-radius:50%}.sim-head i:nth-child(1){background:#ff5f57}.sim-head i:nth-child(2){background:#febc2e}.sim-head i:nth-child(3){background:#28c840}.sim-head span{margin-left:10px;font-size:13px;color:rgba(255,255,255,.6)}.sim-body{display:grid;grid-template-columns:220px 1fr;min-height:360px}.sim-side{background:rgba(0,0,0,.25);padding:18px 12px;display:flex;flex-direction:column;gap:6px}.sim-side .sitem{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;font-size:13px;color:rgba(255,255,255,.7);cursor:pointer;transition:.15s}.sim-side .sitem:hover,.sim-side .sitem.on{background:rgba(255,255,255,.12);color:#fff}.sim-side .sitem .dot{width:28px;height:28px;border-radius:8px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:12px}.sim-main{display:flex;flex-direction:column}.sim-msgs{flex:1;padding:18px;display:flex;flex-direction:column;gap:12px;overflow:hidden}.sim-msg{max-width:78%;padding:12px 16px;border-radius:14px;font-size:13.5px;line-height:1.5;animation:fadeUp .5s both}.sim-msg.in{align-self:flex-start;background:rgba(255,255,255,.1)}.sim-msg.out{align-self:flex-end;background:var(--grad)}.sim-input{display:flex;gap:10px;padding:14px;border-top:1px solid rgba(255,255,255,.12)}.sim-input input{flex:1;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:12px 16px;color:#fff;font-size:14px;outline:none}.sim-input input::placeholder{color:rgba(255,255,255,.4)}.sim-input button{background:var(--grad);border:none;color:#fff;border-radius:12px;padding:0 22px;font-weight:700;cursor:pointer}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
/* steps */
.steps{background:#fff}.step-card{padding:34px 28px;text-align:center}.step-card .n{width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;margin:0 auto 18px}.step-card h3{font-size:19px;margin-bottom:10px;color:var(--dark)}.step-card p{color:var(--muted);font-size:14.5px}
/* features */
.features{background:var(--bg)}.feat-card{padding:30px 26px}.feat-card h3{font-size:18px;margin:18px 0 10px;color:var(--dark)}.feat-card p{color:var(--muted);font-size:14px}
/* stats/nodes */
.nodes{background:linear-gradient(160deg,#0b1220,#111a2e);color:#fff}.nodes .section-title{color:#fff}.nodes .section-sub{color:rgba(255,255,255,.6)}.node-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:44px}.node{padding:20px;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);text-align:center}.node b{display:block;font-size:22px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.node span{font-size:13px;color:rgba(255,255,255,.65)}.region-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}.region{padding:20px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;gap:6px;transition:.25s}.region:hover{background:rgba(255,255,255,.1);transform:translateY(-4px)}.region .flag{font-size:22px}.region b{font-size:15px}.region span{font-size:12.5px;color:rgba(255,255,255,.6)}
/* scenarios */
.scenarios{background:#fff}.scene-card{padding:32px 28px;text-align:center}.scene-card h3{font-size:18px;margin:18px 0 10px}.scene-card p{color:var(--muted);font-size:14px}
/* tags */
.tags{background:var(--bg)}.tags-wrap{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:36px}.tag{padding:14px 26px;border-radius:999px;background:#fff;border:1.5px solid var(--line);font-weight:700;color:var(--dark);font-size:15px;transition:.25s}.tag:hover{border-color:var(--c1);color:var(--c1);box-shadow:var(--shadow)}
/* pricing */
.pricing{background:linear-gradient(160deg,#0b1220,#111a2e);color:#fff}.pricing .section-title{color:#fff}.pricing .section-sub{color:rgba(255,255,255,.6)}.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px;align-items:stretch}.price{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:36px 30px;display:flex;flex-direction:column}.price.hot{background:#fff;color:var(--dark);transform:scale(1.05);box-shadow:0 30px 70px rgba(124,58,237,.35);position:relative}.price.hot .badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:6px 16px;border-radius:999px}.price .pname{font-size:18px;font-weight:700}.price .pamount{font-size:44px;font-weight:800;margin:16px 0 4px}.price .pamount small{font-size:16px;font-weight:600;opacity:.7}.price .pdesc{font-size:13.5px;opacity:.75;margin-bottom:22px}.price ul{display:flex;flex-direction:column;gap:12px;margin-bottom:28px;flex:1}.price ul li{display:flex;align-items:flex-start;gap:10px;font-size:14.5px}.price ul li::before{content:"✓";color:var(--c1);font-weight:800}.price.hot .pamount,.price.hot .pname{color:var(--dark)}.price .btn{width:100%}.price:not(.hot) .btn-primary{background:rgba(255,255,255,.12);box-shadow:none}.price:not(.hot) .btn-primary:hover{background:rgba(255,255,255,.2)}
/* faq */
.faq{background:#fff}.faq-list{max-width:820px;margin:44px auto 0;display:flex;flex-direction:column;gap:14px}.faq-item{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--bg)}.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;cursor:pointer;font-weight:700;font-size:16.5px;color:var(--dark)}.faq-q .ic{flex:none;width:28px;height:28px;border-radius:8px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;transition:.3s}.faq-item.open .faq-q .ic{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-a-in{padding:0 26px 24px;color:var(--muted);font-size:15px}.faq-a-in ol{padding-left:20px;margin-top:10px}.faq-a-in ol li{margin-bottom:8px}
/* news */
.news{background:var(--bg)}.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}.news-card{overflow:hidden;display:flex;flex-direction:column}.news-card img{height:190px;object-fit:cover;width:100%}.news-card .body{padding:22px}.news-card .meta{font-size:12.5px;color:var(--muted);margin-bottom:10px}.news-card h3{font-size:17px;line-height:1.45;margin-bottom:10px;color:var(--dark)}.news-card p{font-size:14px;color:var(--muted);margin-bottom:16px}.news-card .more{color:var(--c1);font-weight:700;font-size:14px}
/* testimonials */
.testimonials{background:#fff}.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}.testi{padding:32px 28px}.testi .stars{color:#f59e0b;font-size:16px;letter-spacing:2px;margin-bottom:16px}.testi p{font-size:15px;color:var(--txt);margin-bottom:22px;line-height:1.7}.testi .who{display:flex;align-items:center;gap:14px}.testi .av{width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}.testi .who b{display:block;font-size:15px;color:var(--dark)}.testi .who span{font-size:13px;color:var(--muted)}
/* cta */
.cta{position:relative;background:radial-gradient(800px 400px at 50% 0%,rgba(124,58,237,.4),transparent 60%),linear-gradient(160deg,#0b1220,#111a2e);color:#fff;text-align:center;padding:100px 0}.cta h2{font-size:42px;font-weight:800;margin-bottom:18px}.cta p{color:rgba(255,255,255,.75);font-size:17px;margin-bottom:34px;max-width:560px;margin-left:auto;margin-right:auto}.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
/* footer */
.footer{background:#070c16;color:rgba(255,255,255,.65);padding:64px 0 28px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}.footer .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff;margin-bottom:16px}.footer .brand img{width:32px;height:32px;border-radius:8px}.footer .brand-p{font-size:14px;line-height:1.7;max-width:280px}.footer h4{color:#fff;font-size:15px;margin-bottom:18px}.footer ul li{margin-bottom:12px}.footer ul a{font-size:14px;transition:.2s}.footer ul a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px}
/* download page */
.dl-hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(124,58,237,.35),transparent 60%),linear-gradient(160deg,#0b1220,#111a2e);color:#fff;padding:150px 0 80px}.dl-hero .hero-inner{grid-template-columns:1fr 1fr}.dl-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}.dl-card{padding:34px 28px;display:flex;flex-direction:column;text-align:center}.dl-card .os{font-size:38px;margin-bottom:14px}.dl-card h3{font-size:19px;margin-bottom:6px}.dl-card .ver{font-size:13px;color:var(--muted);margin-bottom:16px}.dl-card ul{text-align:left;margin-bottom:26px;display:flex;flex-direction:column;gap:10px;flex:1}.dl-card ul li{display:flex;gap:10px;font-size:14px}.dl-card ul li::before{content:"✓";color:var(--c1);font-weight:800}.dl-card .size{font-size:13px;color:var(--muted);margin-bottom:16px}.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:44px}.req{padding:24px;display:flex;gap:14px;align-items:flex-start}.req .ico{width:44px;height:44px;font-size:20px}.req b{display:block;font-size:15px;margin-bottom:4px}.req span{font-size:13.5px;color:var(--muted)}
/* breadcrumb */
.crumb{padding:16px 0;font-size:13.5px;color:var(--muted)}.crumb a:hover{color:var(--c1)}.crumb .sep{margin:0 8px;color:#cbd5e1}
/* news list */
.news-list{max-width:900px;margin:0 auto}.news-row{display:flex;gap:24px;padding:24px;margin-bottom:20px;align-items:center}.news-row img{width:280px;height:160px;object-fit:cover;border-radius:12px;flex:none}.news-row .body h3{font-size:19px;margin-bottom:8px}.news-row .body p{font-size:14px;color:var(--muted);margin-bottom:10px}
/* article */
.article{max-width:820px;margin:0 auto}.article-head h1{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:18px}.article-head .meta{color:var(--muted);font-size:14px;margin-bottom:24px;display:flex;gap:20px;flex-wrap:wrap}.article img{width:100%;border-radius:16px;margin:28px 0}.article .lead{font-size:17px;line-height:1.9;color:var(--txt);margin-bottom:20px}.article h2{font-size:24px;font-weight:800;margin:36px 0 16px;color:var(--dark)}.article p{font-size:16px;line-height:2;color:#334155;margin-bottom:20px}.article blockquote{border-left:4px solid var(--c1);background:var(--bg);padding:18px 22px;border-radius:0 12px 12px 0;font-size:15.5px;color:var(--muted);margin:24px 0}.article-nav{display:flex;justify-content:space-between;gap:20px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}.article-nav a{font-size:14px;color:var(--c1);font-weight:600}
/* 404 */
.nf{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(160deg,#0b1220,#111a2e);color:#fff;text-align:center;padding:24px}.nf .code{font-size:120px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1}.nf h1{font-size:28px;margin:20px 0 12px}.nf p{color:rgba(255,255,255,.7);margin-bottom:28px}.nf .count{font-size:15px;color:rgba(255,255,255,.55);margin-top:20px}
/* sitemap page */
.sitemap{max-width:860px;margin:0 auto}.sitemap h2{font-size:22px;margin:32px 0 16px;color:var(--dark)}.sitemap ul{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.sitemap ul a{display:flex;gap:10px;padding:14px 18px;background:#fff;border:1px solid var(--line);border-radius:12px;font-size:15px;transition:.2s}.sitemap ul a:hover{border-color:var(--c1);color:var(--c1)}
/* responsive */
@media(max-width:992px){
.nav-burger{display:flex}.nav-menu{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:var(--dark);flex-direction:column;align-items:flex-start;padding:90px 24px 24px;gap:4px;transition:.35s;overflow-y:auto}.nav-menu.open{right:0}.nav-link{width:100%;font-size:16px;justify-content:space-between}.dropdown{position:static;opacity:1;visibility:visible;transform:none;background:rgba(255,255,255,.06);box-shadow:none;min-width:0;display:none;width:100%}.dropdown.open{display:block}.dropdown a{color:rgba(255,255,255,.8);padding:10px 14px 10px 26px}.nav-cta .btn-ghost{display:none}.nav-cta .btn{padding:12px 20px}.hero{padding:130px 0 80px}.hero-inner,.dl-hero .hero-inner{grid-template-columns:1fr;gap:40px}.hero h1{font-size:40px}.sim-body{grid-template-columns:1fr}.sim-side{flex-direction:row;overflow-x:auto}.grid-3,.grid-4,.grid-6,.price-grid,.dl-cards,.testi-grid,.news-grid{grid-template-columns:repeat(2,1fr)}.region-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.news-row{flex-direction:column;align-items:flex-start}.news-row img{width:100%;height:auto}}
@media(max-width:768px){
.section{padding:60px 0}.section-title{font-size:30px}.hero h1{font-size:32px}.hero .sell{font-size:16px}.hero-stats{gap:22px}.hero-stats .st b{font-size:24px}.grid-3,.grid-4,.grid-6,.price-grid,.dl-cards,.testi-grid,.news-grid,.region-grid,.req-grid{grid-template-columns:1fr}.node-grid{grid-template-columns:repeat(2,1fr)}.price.hot{transform:none}.footer-grid{grid-template-columns:1fr}.cta h2{font-size:30px}.article-head h1{font-size:26px}.article-nav{flex-direction:column}.sitemap ul{grid-template-columns:1fr}}
@media(max-width:480px){
.container{padding:0 16px}.hero{padding:120px 0 60px}.hero-actions .btn{width:100%}.hero-stats{flex-wrap:wrap;gap:16px 28px}.section-title{font-size:26px}.nav-cta .btn{display:none}.nav-cta .btn-primary{display:inline-flex}.sim-msgs{padding:14px}.btn-lg{padding:15px 26px;font-size:15px}}