:root{--brand:#ff4d4f;--brand2:#ff8a3c;--grad:linear-gradient(135deg,#ff5a3c,#ff8a3c);--grad2:linear-gradient(135deg,#ff4d4f,#ff7a45);--navy:#0b1f3a;--ink:#1a2233;--muted:#6b7280;--line:#e6eaf2;--bg:#f6f8fc;--card:#fff;--radius:18px;--shadow:0 10px 40px rgba(15,31,58,.08);--shadow-lg:0 24px 70px rgba(15,31,58,.16);--fs:15px}
*{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,Helvetica,Arial,sans-serif;color:var(--ink);font-size:var(--fs);line-height:1.7;background:#fff;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
section{position:relative}
.sec{padding:96px 0}
.sec-alt{background:var(--bg)}
.sec-dark{background:var(--navy);color:#fff}
.wrap{display:flex;align-items:center;justify-content:space-between;gap:32px}
h1,h2,h3,h4{line-height:1.25;font-weight:800;color:inherit}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--grad);border-radius:2px}
.sec-title{font-size:38px;margin-bottom:16px;letter-spacing:-.5px}
.sec-desc{font-size:17px;color:var(--muted);max-width:640px;margin:0 auto 52px;text-align:center}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .sec-desc{margin-bottom:0}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:12px;font-size:15px;font-weight:700;cursor:pointer;border:2px solid transparent;transition:all .3s ease;white-space:nowrap}
.btn-primary{background:var(--grad2);color:#fff;box-shadow:0 10px 24px rgba(255,77,79,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,77,79,.42)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(255,77,79,.04)}
.btn-lg{padding:16px 36px;font-size:16px;border-radius:14px}
.btn-sm{padding:9px 18px;font-size:13px;border-radius:9px}
/* Header */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background .3s ease,box-shadow .3s ease,padding .3s ease;padding:14px 0}
.header.scrolled{background:rgba(11,31,58,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 8px 30px rgba(0,0,0,.18);padding:8px 0}
.header.scrolled .nav-link,.header.scrolled .nav-group>span{color:#fff}
.header.scrolled .nav-panel{color:var(--ink)}
.header.scrolled .logo-text{color:#fff}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo img{width:34px;height:34px;border-radius:8px}
.logo-text{font-size:19px;font-weight:800;letter-spacing:-.3px;color:#fff}
.menu{display:flex;align-items:center;gap:6px}
.nav-group{position:relative}
.nav-link,.nav-group>span{display:flex;align-items:center;gap:6px;padding:9px 14px;border-radius:9px;font-size:15px;font-weight:600;color:rgba(255,255,255,.85);cursor:pointer;transition:all .25s ease}
.nav-link:hover,.nav-group>span:hover{color:#fff;background:rgba(255,255,255,.12)}
.nav-arrow{font-size:11px;transition:transform .3s ease;display:inline-block}
.nav-group:hover .nav-arrow{transform:rotate(180deg)}
.nav-panel{position:absolute;top:calc(100% + 12px);left:0;min-width:220px;background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);padding:10px;opacity:0;visibility:hidden;transform:translateY(12px);transition:all .28s ease;z-index:20}
.nav-group:hover .nav-panel{opacity:1;visibility:visible;transform:translateY(0)}
.nav-panel a{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-radius:9px;font-size:14px;font-weight:500;color:var(--ink);transition:all .2s ease}
.nav-panel a:hover{background:rgba(255,77,79,.06);color:var(--brand);padding-left:18px}
.nav-panel a::after{content:"→";opacity:0;transform:translateX(-6px);transition:all .2s ease}
.nav-panel a:hover::after{opacity:1;transform:translateX(0);color:var(--brand)}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none}
.hamburger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s ease}
.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)}
.mobile-menu{display:none;position:fixed;top:60px;left:0;right:0;background:var(--navy);padding:16px 24px 24px;max-height:calc(100vh - 60px);overflow-y:auto;z-index:999}
.mobile-menu.open{display:block}
.mobile-menu .nav-link,.mobile-menu .nav-group>span{color:#fff;width:100%;justify-content:space-between;padding:13px 8px;border-bottom:1px solid rgba(255,255,255,.1)}
.mobile-menu .nav-panel{position:static;opacity:1;visibility:visible;transform:none;background:transparent;box-shadow:none;padding:0 0 0 16px;display:none}
.mobile-menu .nav-group.open .nav-panel{display:block}
.mobile-menu .nav-panel a{color:rgba(255,255,255,.8);padding:11px 8px}
.mobile-menu .nav-panel a::after{display:none}
.mobile-cta{display:flex;gap:10px;margin-top:18px}
/* Hero */
.hero{position:relative;background:radial-gradient(1100px 600px at 80% -10%,rgba(255,138,60,.28),transparent 60%),radial-gradient(900px 500px at 10% 20%,rgba(43,107,255,.25),transparent 55%),var(--navy);color:#fff;padding:150px 0 100px;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:7px 16px;border-radius:100px;font-size:13px;font-weight:600;margin-bottom:22px}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#4ade80;box-shadow:0 0 0 4px rgba(74,222,128,.25)}
.hero h1{font-size:52px;line-height:1.12;margin-bottom:20px;letter-spacing:-1px}
.hero-sub{font-size:18px;color:rgba(255,255,255,.78);max-width:520px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-stats{display:flex;gap:36px;flex-wrap:wrap}
.stat b{display:block;font-size:28px;font-weight:800;letter-spacing:-.5px}
.stat span{font-size:13px;color:rgba(255,255,255,.65)}
/* Simulator */
.sim{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:22px;padding:20px;backdrop-filter:blur(10px)}
.sim-bar{display:flex;align-items:center;gap:8px;margin-bottom:16px}
.sim-bar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.sim-bar i:nth-child(2){background:#febc2e}.sim-bar i:nth-child(3){background:#28c840}
.sim-title{font-size:13px;color:rgba(255,255,255,.55);margin-left:8px}
.sim-doc{background:#fff;border-radius:14px;padding:20px;color:var(--ink);min-height:300px}
.sim-doc h4{font-size:16px;margin-bottom:10px}
.sim-line{height:10px;border-radius:6px;background:#eef1f7;margin-bottom:10px}
.sim-line.l1{width:90%}.sim-line.l2{width:70%}.sim-line.l3{width:82%}
.sim-img{height:90px;border-radius:10px;background:linear-gradient(135deg,#ffe8e0,#fff1e6);margin:16px 0}
.sim-toolbar{display:flex;gap:8px;margin-top:12px}
.sim-toolbar span{flex:1;text-align:center;padding:9px;border-radius:9px;background:#f6f8fc;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s}
.sim-toolbar span.on{background:var(--grad2);color:#fff}
.sim-note{margin-top:14px;font-size:12px;color:#9aa3b2}
/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:36px 30px;position:relative;transition:all .35s ease}
.step-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.step-num{position:absolute;top:24px;right:28px;font-size:52px;font-weight:800;color:#f0f3f9;line-height:1}
.step-icon{width:58px;height:58px;border-radius:16px;background:rgba(255,77,79,.1);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:20px}
.step-card h3{font-size:20px;margin-bottom:10px}
.step-card p{color:var(--muted);font-size:14px}
/* Features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.feat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;transition:all .35s ease;position:relative;overflow:hidden}
.feat-card::before{content:"";position:absolute;inset:0;background:var(--grad);opacity:0;transition:opacity .35s ease}
.feat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.feat-card:hover::before{opacity:1}
.feat-card>*{position:relative;z-index:1}
.feat-icon{width:54px;height:54px;border-radius:14px;background:rgba(255,77,79,.1);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px;transition:all .35s}
.feat-card:hover .feat-icon{background:rgba(255,255,255,.2)}
.feat-card h3{font-size:18px;margin-bottom:10px;transition:color .35s}
.feat-card p{color:var(--muted);font-size:14px;transition:color .35s}
.feat-card:hover h3,.feat-card:hover p{color:#fff}
/* Stats / nodes */
.stats-band{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-bottom:56px}
.stat-box{text-align:center;padding:32px 16px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:16px}
.stat-box b{display:block;font-size:38px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-box span{font-size:14px;color:rgba(255,255,255,.65)}
.nodes-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.node-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:20px;display:flex;align-items:center;gap:12px;transition:all .3s}
.node-card:hover{background:rgba(255,255,255,.12);transform:translateY(-4px)}
.node-flag{width:36px;height:36px;border-radius:10px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.node-card b{font-size:14px;display:block}
.node-card span{font-size:12px;color:rgba(255,255,255,.55)}
/* Scenario */
.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.scenario-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;transition:all .35s}
.scenario-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.scenario-icon{width:56px;height:56px;border-radius:16px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:20px;box-shadow:0 10px 20px rgba(255,77,79,.25)}
.scenario-card h3{font-size:19px;margin-bottom:10px}
.scenario-card p{color:var(--muted);font-size:14px}
/* Tags */
.tags{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.tag{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:100px;background:var(--card);border:1px solid var(--line);font-size:15px;font-weight:600;transition:all .3s}
.tag:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
.tag::before{content:"#";color:var(--brand);font-weight:800}
/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:stretch}
.price-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:38px 30px;position:relative;transition:all .35s}
.price-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.price-card.featured{background:var(--navy);color:#fff;border-color:transparent;transform:scale(1.04);box-shadow:var(--shadow-lg)}
.price-card.featured:hover{transform:scale(1.04) translateY(-8px)}
.price-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad2);color:#fff;font-size:12px;font-weight:700;padding:6px 18px;border-radius:100px;white-space:nowrap}
.price-name{font-size:18px;font-weight:700;margin-bottom:6px}
.price-desc{font-size:13px;color:var(--muted);margin-bottom:20px}
.price-card.featured .price-desc{color:rgba(255,255,255,.6)}
.price-amount{font-size:44px;font-weight:800;letter-spacing:-1px;margin-bottom:4px}
.price-amount small{font-size:15px;font-weight:500;color:var(--muted)}
.price-card.featured .price-amount small{color:rgba(255,255,255,.6)}
.price-unit{font-size:13px;color:var(--muted);margin-bottom:24px}
.price-card.featured .price-unit{color:rgba(255,255,255,.6)}
.price-list{margin-bottom:28px}
.price-list li{display:flex;align-items:center;gap:10px;padding:9px 0;font-size:14px}
.price-list li::before{content:"✓";width:20px;height:20px;border-radius:50%;background:rgba(255,77,79,.12);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;flex-shrink:0}
.price-card.featured .price-list li::before{background:rgba(255,255,255,.18);color:#fff}
.price-card .btn{width:100%}
.price-card.featured .btn{background:#fff;color:var(--navy)}
/* FAQ */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:all .3s}
.faq-item.open{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;cursor:pointer;font-weight:700;font-size:16px}
.faq-q .faq-ico{width:28px;height:28px;border-radius:8px;background:rgba(255,77,79,.1);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;transition:transform .3s}
.faq-item.open .faq-ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a-inner{padding:0 24px 22px;color:var(--muted);font-size:14px}
.faq-a-inner ol{margin:10px 0 0 18px;list-style:decimal}
.faq-a-inner li{margin-bottom:6px}
/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .35s}
.news-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.news-cover{height:190px;overflow:hidden;position:relative}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.news-card:hover .news-cover img{transform:scale(1.08)}
.news-cat{position:absolute;top:14px;left:14px;background:var(--grad2);color:#fff;font-size:12px;font-weight:600;padding:4px 12px;border-radius:100px}
.news-body{padding:22px}
.news-body h3{font-size:17px;margin-bottom:10px;line-height:1.45}
.news-body h3 a:hover{color:var(--brand)}
.news-body p{font-size:13px;color:var(--muted);margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{font-size:12px;color:#9aa3b2}
/* Testimonials */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.testi-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:all .35s}
.testi-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.testi-stars{color:#ffb400;font-size:15px;letter-spacing:2px;margin-bottom:14px}
.testi-card p{font-size:14px;color:var(--ink);margin-bottom:22px;line-height:1.8}
.testi-user{display:flex;align-items:center;gap:12px}
.testi-ava{width:46px;height:46px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:17px}
.testi-user b{font-size:14px;display:block}
.testi-user span{font-size:12px;color:var(--muted)}
/* CTA */
.cta{background:radial-gradient(800px 400px at 50% -10%,rgba(255,138,60,.35),transparent 60%),var(--navy);color:#fff;text-align:center;padding:90px 0;border-radius:0}
.cta h2{font-size:42px;margin-bottom:18px;letter-spacing:-1px}
.cta p{font-size:17px;color:rgba(255,255,255,.7);max-width:520px;margin:0 auto 34px}
/* Footer */
.footer{background:#081426;color:#fff;padding:70px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:50px}
.footer-brand p{color:rgba(255,255,255,.55);font-size:14px;margin:16px 0;max-width:280px}
.footer h4{font-size:15px;margin-bottom:18px}
.footer-col a{display:block;color:rgba(255,255,255,.6);font-size:14px;padding:6px 0;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;text-align:center;color:rgba(255,255,255,.45);font-size:13px}
/* Download page */
.dl-hero{background:radial-gradient(1100px 600px at 80% -10%,rgba(255,138,60,.28),transparent 60%),radial-gradient(900px 500px at 10% 20%,rgba(43,107,255,.25),transparent 55%),var(--navy);color:#fff;padding:150px 0 90px}
.dl-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.dl-meta{display:flex;gap:28px;flex-wrap:wrap;margin-top:30px}
.dl-meta .stat b{font-size:24px}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:34px 30px;transition:all .35s;display:flex;flex-direction:column}
.dl-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.dl-card h3{font-size:20px;margin-bottom:4px}
.dl-card .dl-ver{font-size:13px;color:var(--brand);font-weight:700;margin-bottom:14px}
.dl-size{font-size:13px;color:var(--muted);margin-bottom:16px}
.dl-card ul{margin-bottom:24px;flex:1}
.dl-card ul li{display:flex;gap:10px;padding:7px 0;font-size:14px;color:var(--ink)}
.dl-card ul li::before{content:"✓";color:var(--brand);font-weight:800}
.dl-card.coming{opacity:.75}
.dl-card.coming .btn{background:#e5e9f2;color:#9aa3b2;cursor:not-allowed;box-shadow:none}
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.req-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px}
.req-card h4{font-size:16px;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.req-card h4::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--grad)}
.req-card p{font-size:14px;color:var(--muted)}
/* News list/detail */
.page-head{background:var(--navy);color:#fff;padding:150px 0 70px;text-align:center}
.page-head h1{font-size:40px;margin-bottom:14px}
.page-head p{color:rgba(255,255,255,.7);font-size:16px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:30px}
.crumb a:hover{color:var(--brand)}
.article{max-width:820px;margin:0 auto}
.article-meta{display:flex;gap:20px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:26px;flex-wrap:wrap}
.article-cover{border-radius:16px;overflow:hidden;margin-bottom:34px}
.article h2{font-size:26px;margin:34px 0 16px}
.article p{font-size:16px;line-height:1.9;color:#374151;margin-bottom:18px}
.article img{border-radius:14px;margin:22px 0}
.article .fig{font-size:12px;color:#9aa3b2;text-align:center;margin-top:-14px;margin-bottom:22px}
.article-nav{display:flex;justify-content:space-between;gap:20px;margin-top:50px;padding-top:30px;border-top:1px solid var(--line)}
.article-nav a{flex:1;padding:16px 20px;border:1px solid var(--line);border-radius:12px;font-size:14px;transition:all .25s}
.article-nav a:hover{border-color:var(--brand);color:var(--brand)}
.article-nav .next{text-align:right}
.article-nav .prev{text-align:left}
.article-nav .dir{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
/* Sitemap */
.sitemap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.sitemap-col{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px}
.sitemap-col h3{font-size:17px;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--grad);display:inline-block}
.sitemap-col a{display:block;padding:8px 0;font-size:14px;color:var(--muted);transition:all .2s}
.sitemap-col a:hover{color:var(--brand);padding-left:8px}
/* 404 */
.notfound{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--navy);color:#fff;text-align:center;padding:40px 20px}
.notfound h1{font-size:120px;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.notfound h2{font-size:28px;margin:20px 0 12px}
.notfound p{color:rgba(255,255,255,.65);margin-bottom:30px}
/* Reveal animation */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:translateY(0)}
/* Back to top */
.to-top{position:fixed;bottom:30px;right:30px;width:46px;height:46px;border-radius:12px;background:var(--grad2);color:#fff;border:none;cursor:pointer;font-size:20px;box-shadow:0 10px 24px rgba(255,77,79,.35);opacity:0;visibility:hidden;transition:all .3s;z-index:900}
.to-top.show{opacity:1;visibility:visible}
/* Responsive */
@media(max-width:992px){
.sec{padding:70px 0}
.sec-title{font-size:30px}
.hero,.dl-hero{padding:120px 0 70px}
.hero-grid,.dl-grid{grid-template-columns:1fr;gap:40px}
.hero h1{font-size:40px}
.steps-grid,.feat-grid,.scenario-grid,.news-grid,.testi-grid,.pricing-grid,.req-grid,.sitemap-grid{grid-template-columns:repeat(2,1fr)}
.stats-band{grid-template-columns:repeat(2,1fr)}
.nodes-grid{grid-template-columns:repeat(3,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
.menu{display:none}
.nav-cta{display:none}
.hamburger{display:flex}
}
@media(max-width:768px){
.container{padding:0 18px}
.sec-title{font-size:26px}
.hero h1{font-size:32px}
.hero-sub{font-size:16px}
.steps-grid,.feat-grid,.scenario-grid,.news-grid,.testi-grid,.pricing-grid,.req-grid,.sitemap-grid,.nodes-grid{grid-template-columns:1fr}
.hero-stats{justify-content:space-between}
.cta h2{font-size:30px}
.footer-grid{grid-template-columns:1fr}
.wrap{flex-direction:column;align-items:flex-start}
.article h2{font-size:22px}
}
@media(max-width:480px){
.hero h1{font-size:28px}
.sec-desc{font-size:15px}
.btn-lg{padding:14px 26px;font-size:15px}
.hero-actions{flex-direction:column}
.hero-actions .btn{width:100%}
.price-card.featured{transform:none}
.notfound h1{font-size:88px}
}