:root{--primary:#4f6dff;--primary2:#7b5cff;--grad:linear-gradient(135deg,#4f6dff 0%,#7b5cff 100%);--dark:#0b1020;--dark2:#131a30;--text:#1a2233;--muted:#5b6474;--line:#e7eaf2;--bg:#f6f8fc;--card:#ffffff;--success:#22c55e;--radius:16px;--shadow:0 10px 30px rgba(15,25,60,.08);--shadow-lg:0 20px 50px rgba(15,25,60,.16)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}ul,ol{list-style:none}img{max-width:100%;display:block}button{font-family:inherit;cursor:pointer;border:none;background:none}.container{max-width:1200px;margin:0 auto;padding:0 24px}.section{padding:88px 0}.section-head{text-align:center;max-width:680px;margin:0 auto 56px}.section-head .kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--primary);text-transform:uppercase;margin-bottom:14px}.section-head h2{font-size:38px;line-height:1.25;color:var(--dark);margin-bottom:16px}.section-head p{color:var(--muted);font-size:17px}.grid{display:grid;gap:24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 30px;border-radius:50px;font-size:16px;font-weight:600;transition:all .25s;white-space:nowrap}.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(79,109,255,.35)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(79,109,255,.5)}.btn-ghost{border:1.5px solid rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.08)}.btn-ghost:hover{background:rgba(255,255,255,.16);border-color:#fff}.btn-ghost-dark{border:1.5px solid var(--line);color:var(--text);background:#fff}.btn-ghost-dark:hover{border-color:var(--primary);color:var(--primary)}.btn-lg{padding:17px 40px;font-size:17px}.btn-sm{padding:10px 22px;font-size:14px}
/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:999;transition:background .35s,box-shadow .35s,padding .35s;padding:16px 0}.nav.scrolled{background:rgba(11,16,32,.88);backdrop-filter:blur(14px);box-shadow:0 4px 20px rgba(0,0,0,.18);padding:10px 0}.nav .container{display:flex;align-items:center;justify-content:space-between}.nav-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:21px;font-weight:800;letter-spacing:.5px}.nav-logo img{height:36px;width:auto}.nav-menu{display:flex;align-items:center;gap:4px}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:6px;color:#e8ecf7;font-size:15px;font-weight:500;padding:10px 14px;border-radius:8px;transition:color .2s;cursor:pointer}.nav-link:hover{color:#fff}.nav-link .arrow{font-size:11px;transition:transform .3s}.nav-item:hover .arrow{transform:rotate(180deg)}.dropdown{position:absolute;top:100%;left:0;min-width:230px;background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);padding:10px;opacity:0;visibility:hidden;transform:translateY(14px);transition:all .28s}.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(6px)}.dropdown a{display:block;padding:11px 16px;border-radius:9px;color:var(--text);font-size:14.5px;font-weight:500;transition:background .2s,color .2s}.dropdown a:hover{background:var(--bg);color:var(--primary)}.nav-actions{display:flex;align-items:center;gap:12px}.hamburger{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer}.hamburger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}.hamburger.active span:nth-child(2){opacity:0}.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* HERO */
.hero{background:radial-gradient(1200px 600px at 80% -10%,#3b4bb8 0%,transparent 60%),radial-gradient(900px 500px at -10% 20%,#7b5cff 0%,transparent 55%),linear-gradient(135deg,#0b1020 0%,#151c38 55%,#1b2450 100%);color:#fff;padding:170px 0 110px;position:relative;overflow:hidden}.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:8px 16px;border-radius:50px;font-size:13px;margin-bottom:24px}.hero h1{font-size:54px;line-height:1.15;font-weight:800;margin-bottom:20px}.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{font-size:18px;color:#c7cdea;max-width:520px;margin-bottom:34px}.hero-btns{display:flex;gap:16px;margin-bottom:44px;flex-wrap:wrap}.hero-stats{display:flex;gap:44px}.hero-stat .num{font-size:32px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.hero-stat .lbl{font-size:13px;color:#aab3d4;margin-top:2px}.hero-visual{position:relative}.simulator{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:24px;padding:24px;backdrop-filter:blur(8px);box-shadow:var(--shadow-lg)}.sim-window{background:#0e1428;border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}.sim-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#161d38}.sim-bar .dot{width:10px;height:10px;border-radius:50%}.sim-bar .dot:nth-child(1){background:#ff5f57}.sim-bar .dot:nth-child(2){background:#febc2e}.sim-bar .dot:nth-child(3){background:#28c840}.sim-bar .url{flex:1;text-align:center;background:#0b1020;border-radius:6px;color:#8a94b8;font-size:12px;padding:4px 12px}.sim-body{padding:24px}.sim-status{display:flex;align-items:center;gap:12px;margin-bottom:20px}.sim-toggle{width:52px;height:30px;background:rgba(255,255,255,.15);border-radius:30px;position:relative;cursor:pointer;transition:background .3s}.sim-toggle.on{background:var(--success)}.sim-toggle .knob{position:absolute;top:3px;left:3px;width:24px;height:24px;background:#fff;border-radius:50%;transition:left .3s}.sim-toggle.on .knob{left:25px}.sim-label{font-size:15px;font-weight:600}.sim-label small{display:block;font-size:12px;color:#8a94b8;font-weight:400}.sim-node{display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.05);border-radius:12px;padding:14px 16px;margin-bottom:10px;cursor:pointer;transition:background .2s}.sim-node:hover,.sim-node.active{background:rgba(79,109,255,.28);border:1px solid rgba(122,145,255,.5)}.sim-node .flag{font-size:22px}.sim-node .name{flex:1;margin-left:12px;font-size:14px}.sim-node .ping{font-size:13px;color:var(--success);font-weight:700}
/* STEPS */
.steps .grid{grid-template-columns:repeat(3,1fr)}.step-card{background:var(--card);border-radius:var(--radius);padding:34px 28px;text-align:center;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;position:relative}.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.step-num{position:absolute;top:20px;right:24px;font-size:44px;font-weight:800;color:#eef1fb}.step-icon{width:64px;height:64px;margin:0 auto 20px;border-radius:18px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}.step-card h3{font-size:20px;margin-bottom:10px}.step-card p{color:var(--muted);font-size:15px}
/* FEATURES */
.features .grid{grid-template-columns:repeat(3,1fr)}.feat-card{background:var(--card);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.feat-icon{width:54px;height:54px;border-radius:14px;background:#eef2ff;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:20px}.feat-card h3{font-size:19px;margin-bottom:10px}.feat-card p{color:var(--muted);font-size:15px}
/* STATS / NODES */
.stats{background:var(--dark);color:#fff}.stats-band{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;padding-bottom:56px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:56px}.stat-item .num{font-size:40px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.stat-item .lbl{font-size:14px;color:#aab3d4;margin-top:4px}.nodes .grid{grid-template-columns:repeat(4,1fr);gap:16px}.node-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:20px;display:flex;align-items:center;gap:12px;transition:background .25s,border .25s}.node-card:hover{background:rgba(79,109,255,.22);border-color:rgba(122,145,255,.5)}.node-card .flag{font-size:26px}.node-card .nname{font-size:15px;font-weight:600}.node-card .ninfo{font-size:12px;color:#aab3d4}
/* SCENARIOS */
.scenarios .grid{grid-template-columns:repeat(3,1fr)}.scen-card{background:var(--card);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow);transition:transform .25s}.scen-card:hover{transform:translateY(-6px)}.scen-icon{font-size:34px;margin-bottom:16px}.scen-card h3{font-size:19px;margin-bottom:10px}.scen-card p{color:var(--muted);font-size:15px}
/* PROTOCOLS */
.protocols{background:var(--dark);color:#fff}.tags{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}.tag{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);padding:14px 26px;border-radius:50px;font-size:16px;font-weight:600;transition:all .25s}.tag:hover{background:var(--grad);border-color:transparent;transform:translateY(-3px)}
/* PRICING */
.pricing .grid{grid-template-columns:repeat(3,1fr);align-items:stretch}.price-card{background:var(--card);border-radius:20px;padding:38px 32px;box-shadow:var(--shadow);position:relative;display:flex;flex-direction:column}.price-card.featured{background:var(--dark);color:#fff;transform:scale(1.05);box-shadow:var(--shadow-lg)}.price-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:5px 18px;border-radius:50px;white-space:nowrap}.price-card h3{font-size:20px;margin-bottom:8px}.price-desc{font-size:13px;color:var(--muted);margin-bottom:22px}.price-card.featured .price-desc{color:#aab3d4}.price-amount{font-size:44px;font-weight:800;margin-bottom:22px}.price-amount small{font-size:16px;font-weight:400;color:var(--muted)}.price-card.featured .price-amount small{color:#aab3d4}.price-list{margin-bottom:28px;flex:1}.price-list li{padding:8px 0;font-size:15px;display:flex;align-items:center;gap:10px}.price-list li::before{content:"✓";color:var(--success);font-weight:700}.price-card .btn{width:100%}
/* FAQ */
.faq-list{max-width:820px;margin:0 auto}.faq-item{background:var(--card);border-radius:14px;margin-bottom:14px;box-shadow:var(--shadow);overflow:hidden}.faq-q{padding:20px 26px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;font-weight:600;font-size:16px}.faq-q .faq-icon{transition:transform .3s;color:var(--primary);font-size:20px}.faq-item.open .faq-q .faq-icon{transform:rotate(45deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--muted);font-size:15px}.faq-a-inner{padding:0 26px 24px}.faq-item.open .faq-a{max-height:900px}.faq-a ol{padding-left:20px;list-style:decimal}.faq-a ol li{margin:6px 0}
/* NEWS */
.news-grid{grid-template-columns:repeat(3,1fr)}.news-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.news-cover{aspect-ratio:16/9;overflow:hidden}.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s}.news-card:hover .news-cover img{transform:scale(1.06)}.news-body{padding:22px;flex:1;display:flex;flex-direction:column}.news-meta{font-size:12px;color:var(--muted);margin-bottom:10px}.news-cat{color:var(--primary);font-weight:600}.news-card h3{font-size:18px;line-height:1.4;margin-bottom:10px}.news-card p{color:var(--muted);font-size:14px;flex:1;margin-bottom:16px}.news-link{color:var(--primary);font-weight:600;font-size:14px}
/* TESTIMONIALS */
.testimonials{background:var(--bg)}.testi-grid{grid-template-columns:repeat(3,1fr)}.testi-card{background:var(--card);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}.stars{color:#f59e0b;font-size:16px;margin-bottom:14px;letter-spacing:2px}.testi-card blockquote{color:var(--text);font-size:15px;margin-bottom:20px;font-style:italic}.testi-user{display:flex;align-items:center;gap:12px}.avatar{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:17px}.testi-user .uname{font-weight:600;font-size:15px}.testi-user .urole{font-size:13px;color:var(--muted)}
/* CTA */
.cta{background:var(--grad);color:#fff;text-align:center;padding:90px 0}.cta h2{font-size:42px;font-weight:800;margin-bottom:16px}.cta p{font-size:17px;opacity:.92;margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto}.cta .btn-primary{background:#fff;color:var(--primary);box-shadow:0 8px 24px rgba(0,0,0,.2)}
/* FOOTER */
.footer{background:var(--dark);color:#b6bdd6;padding:70px 0 0}.footer .container{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:50px}.footer-brand p{margin-top:16px;font-size:14px;color:#8a94b8;max-width:280px}.footer h4{color:#fff;font-size:16px;margin-bottom:20px}.footer ul li{margin-bottom:12px}.footer ul a{font-size:14px;transition:color .2s}.footer ul a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;text-align:center;font-size:13px;color:#8a94b8}
/* PAGE HERO (inner pages) */
.page-hero{background:radial-gradient(900px 500px at 80% -10%,#3b4bb8 0%,transparent 60%),linear-gradient(135deg,#0b1020 0%,#151c38 60%,#1b2450 100%);color:#fff;padding:160px 0 90px;text-align:center}.page-hero h1{font-size:46px;font-weight:800;margin-bottom:16px}.page-hero p{font-size:17px;color:#c7cdea;max-width:620px;margin:0 auto}
/* DOWNLOAD */
.dl-versions .grid{grid-template-columns:repeat(3,1fr)}.dl-card{background:var(--card);border-radius:18px;padding:32px 26px;box-shadow:var(--shadow);text-align:center;display:flex;flex-direction:column}.dl-card .ver{font-size:13px;font-weight:700;color:var(--primary);margin-bottom:6px}.dl-card h3{font-size:22px;margin-bottom:4px}.dl-card .size{color:var(--muted);font-size:13px;margin-bottom:20px}.dl-card ul{text-align:left;margin-bottom:24px;flex:1}.dl-card ul li{padding:6px 0;font-size:14px;display:flex;gap:8px}.dl-card ul li::before{content:"✓";color:var(--success);font-weight:700}.sysreq .grid{grid-template-columns:repeat(3,1fr)}.sys-item{background:var(--card);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.sys-item h4{font-size:15px;color:var(--primary);margin-bottom:6px}.sys-item p{font-size:14px;color:var(--muted)}
/* BREADCRUMB */
.breadcrumb{background:var(--bg);padding:18px 0;font-size:14px;color:var(--muted)}.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb span{margin:0 8px}
/* ARTICLE */
.article{max-width:820px;margin:0 auto;padding:50px 24px 90px}.article h1{font-size:36px;line-height:1.3;margin-bottom:20px;color:var(--dark)}.article-meta{display:flex;gap:20px;color:var(--muted);font-size:14px;margin-bottom:30px}.article-meta .cat{color:var(--primary);font-weight:600}.article-cover{border-radius:16px;overflow:hidden;margin-bottom:32px}.article-cover img{width:100%}.article-body p{font-size:16.5px;line-height:1.85;color:#333c4f;margin-bottom:22px}.article-body h2{font-size:26px;color:var(--dark);margin:36px 0 16px}.article-body img{border-radius:12px;margin:22px 0}.article-body blockquote{border-left:4px solid var(--primary);background:var(--bg);padding:18px 22px;border-radius:0 12px 12px 0;margin:24px 0;color:var(--text);font-size:15.5px}.article-nav{display:flex;justify-content:space-between;margin-top:50px;padding-top:26px;border-top:1px solid var(--line)}.article-nav a{color:var(--primary);font-weight:600;font-size:15px}
/* SITEMAP */
.sitemap-body{max-width:820px;margin:0 auto;padding:50px 24px 90px}.sitemap-group{margin-bottom:36px}.sitemap-group h2{font-size:22px;color:var(--dark);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--line)}.sitemap-group ul li{margin:10px 0}.sitemap-group ul a{color:var(--text);font-size:15px}.sitemap-group ul a:hover{color:var(--primary)}
/* 404 */
.notfound{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:radial-gradient(900px 500px at 50% -10%,#3b4bb8 0%,transparent 60%),linear-gradient(135deg,#0b1020,#151c38);color:#fff;text-align:center;padding:24px}.notfound .code{font-size:140px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}.notfound h1{font-size:30px;margin:10px 0 16px}.notfound p{color:#c7cdea;margin-bottom:8px}.notfound .countdown{color:var(--primary);font-weight:700;font-size:18px;margin:20px 0}
/* RESPONSIVE */
@media(max-width:992px){.hero .container{grid-template-columns:1fr;gap:44px}.hero h1{font-size:42px}.nav-menu{position:fixed;top:0;right:-100%;width:min(82vw,340px);height:100vh;background:#0b1020;flex-direction:column;align-items:stretch;gap:0;padding:90px 24px 30px;transition:right .35s;overflow-y:auto}.nav-menu.open{right:0}.nav-item{position:static}.nav-link{padding:14px 8px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.06)}.dropdown{position:static;background:transparent;box-shadow:none;padding:0 0 0 16px;opacity:1;visibility:visible;transform:none;max-height:0;overflow:hidden;transition:max-height .3s;display:block}.dropdown.open{max-height:500px}.dropdown a{color:#c7cdea;padding:10px 8px}.dropdown a:hover{color:#fff;background:transparent}.nav-actions{display:none}.hamburger{display:flex}.steps .grid,.features .grid,.scenarios .grid,.pricing .grid,.news-grid,.testi-grid,.dl-versions .grid,.sysreq .grid{grid-template-columns:repeat(2,1fr)}.nodes .grid{grid-template-columns:repeat(3,1fr)}.stats-band{grid-template-columns:repeat(2,1fr)}.footer .container{grid-template-columns:1fr 1fr}.price-card.featured{transform:none}}
@media(max-width:768px){.section{padding:60px 0}.section-head h2{font-size:30px}.hero{padding:140px 0 80px}.hero h1{font-size:34px}.hero-stats{flex-wrap:wrap;gap:28px}.steps .grid,.features .grid,.scenarios .grid,.pricing .grid,.news-grid,.testi-grid,.dl-versions .grid,.sysreq .grid{grid-template-columns:1fr}.nodes .grid{grid-template-columns:repeat(2,1fr)}.footer .container{grid-template-columns:1fr}.page-hero h1{font-size:34px}.notfound .code{font-size:100px}}
@media(max-width:480px){.container{padding:0 18px}.hero h1{font-size:29px}.hero-btns{flex-direction:column}.btn{width:100%}.hero-stats{gap:20px}.hero-stat .num{font-size:26px}.stats-band{grid-template-columns:1fr}.nodes .grid{grid-template-columns:1fr}.article h1{font-size:28px}.cta h2{font-size:30px}}