*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2563eb;--primary-dark:#1d4ed8;--accent:#0ea5e9;--dark:#0f172a;--text:#1e293b;--muted:#64748b;--light:#f8fafc;--white:#fff;--radius:12px;--shadow:0 4px 20px rgba(0,0,0,.08);--gradient:linear-gradient(135deg,#2563eb 0%,#0ea5e9 100%)}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;color:var(--text);line-height:1.6;background:var(--white)}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:8px;font-weight:600;font-size:15px;border:none;cursor:pointer;transition:all .25s}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 14px rgba(37,99,235,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,.45)}
.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-lg{padding:16px 36px;font-size:17px}
.btn-sm{padding:8px 16px;font-size:13px}
header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);transition:all .3s;border-bottom:1px solid transparent}
header.scrolled{background:rgba(15,23,42,.92);border-bottom-color:rgba(255,255,255,.08)}
header.scrolled .nav-link,header.scrolled .logo-text{color:#fff}
header.scrolled .navbar-toggler span{background:#fff}
.navbar{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--dark)}
.logo img{width:40px;height:40px;border-radius:8px}
.nav-menu{display:flex;align-items:center;gap:8px;list-style:none}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:10px 14px;font-size:15px;font-weight:500;color:var(--text);border-radius:6px;transition:color .2s}
.nav-link:hover,.nav-link.active{color:var(--primary)}
.dropdown-toggle::after{content:"▾";font-size:10px;transition:transform .25s}
.dropdown-toggle:hover::after,.dropdown.open .dropdown-toggle::after{transform:rotate(180deg)}
.dropdown-menu{position:absolute;top:100%;left:0;min-width:200px;background:#fff;border-radius:10px;box-shadow:var(--shadow);padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .25s;z-index:100}
.dropdown:hover .dropdown-menu,.dropdown.open .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-item{display:block;padding:10px 18px;font-size:14px;color:var(--text)}
.dropdown-item:hover{background:var(--light);color:var(--primary)}
.nav-cta{margin-left:12px}
.navbar-toggler{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.navbar-toggler span{width:24px;height:2px;background:var(--dark);border-radius:2px;transition:all .3s}
.hero{padding:140px 0 80px;background:linear-gradient(160deg,#0f172a 0%,#1e3a5f 50%,#0f172a 100%);color:#fff;overflow:hidden;position:relative}
.hero::before{content:"";position:absolute;inset:0;background:url('../images/hero-bg.jpg') center/cover no-repeat;opacity:.15}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;line-height:1.2;margin-bottom:20px}
.hero h1 span{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-lead{font-size:1.15rem;opacity:.9;margin-bottom:28px;max-width:520px}
.hero-stats{display:flex;gap:28px;margin:32px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-num{font-size:1.8rem;font-weight:800;color:#38bdf8}
.stat-label{font-size:13px;opacity:.75}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.demo-box{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:24px;backdrop-filter:blur(8px)}
.demo-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.demo-title{font-weight:600;font-size:15px}
.demo-status{font-size:12px;padding:4px 10px;border-radius:20px;background:rgba(34,197,94,.2);color:#4ade80}
.demo-gauge{text-align:center;margin:20px 0}
.gauge-circle{width:140px;height:140px;border-radius:50%;border:8px solid rgba(255,255,255,.15);border-top-color:#38bdf8;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;flex-direction:column;transition:all .4s}
.gauge-circle.active{animation:spin 1.2s linear infinite;border-top-color:#22c55e}
@keyframes spin{to{transform:rotate(360deg)}}
.gauge-speed{font-size:1.6rem;font-weight:800}
.gauge-unit{font-size:12px;opacity:.7}
.node-list{display:flex;flex-direction:column;gap:8px;margin-top:16px}
.node-item{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:rgba(255,255,255,.06);border-radius:8px;cursor:pointer;transition:background .2s;font-size:14px}
.node-item:hover,.node-item.active{background:rgba(37,99,235,.3)}
.node-flag{margin-right:8px}
.section{padding:80px 0}
.section-title{text-align:center;font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;margin-bottom:12px;color:var(--dark)}
.section-sub{text-align:center;color:var(--muted);max-width:600px;margin:0 auto 48px;font-size:1.05rem}
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);border:1px solid #f1f5f9;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,.1)}
.feature-icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#dbeafe,#e0f2fe);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.feature-card h3{font-size:1.1rem;margin-bottom:8px;font-weight:700}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.6}
.scenarios-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.scenario-card{border-radius:var(--radius);overflow:hidden;position:relative;height:200px;box-shadow:var(--shadow)}
.scenario-card img{width:100%;height:100%;object-fit:cover}
.scenario-overlay{position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(15,23,42,.85));display:flex;align-items:flex-end;padding:16px}
.scenario-overlay h3{color:#fff;font-size:1rem;font-weight:600}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{background:#fff;border-radius:16px;padding:32px 28px;border:2px solid #e2e8f0;text-align:center;position:relative;transition:all .3s}
.price-card.popular{border-color:var(--primary);transform:scale(1.04);box-shadow:0 12px 40px rgba(37,99,235,.2)}
.price-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gradient);color:#fff;font-size:12px;font-weight:700;padding:4px 16px;border-radius:20px}
.price-name{font-size:1.2rem;font-weight:700;margin-bottom:8px}
.price-amount{font-size:2.4rem;font-weight:800;color:var(--primary);margin:12px 0}
.price-amount span{font-size:1rem;font-weight:500;color:var(--muted)}
.price-list{list-style:none;text-align:left;margin:24px 0;font-size:14px}
.price-list li{padding:8px 0;border-bottom:1px solid #f1f5f9;display:flex;align-items:center;gap:8px}
.price-list li::before{content:"✓";color:#22c55e;font-weight:700}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid #e2e8f0;border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;text-align:left;padding:18px 20px;background:#fff;border:none;font-size:15px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:"+";font-size:20px;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;background:var(--light)}
.faq-item.open .faq-a{max-height:500px}
.faq-a-inner{padding:0 20px 18px;font-size:14px;color:var(--muted);line-height:1.7}
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.testimonial-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid #f1f5f9}
.testimonial-stars{color:#fbbf24;margin-bottom:12px;font-size:14px}
.testimonial-text{font-size:14px;color:var(--muted);margin-bottom:16px;line-height:1.7}
.testimonial-author{display:flex;align-items:center;gap:12px}
.author-avatar{width:40px;height:40px;border-radius:50%;background:var(--gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.author-name{font-weight:600;font-size:14px}
.author-role{font-size:12px;color:var(--muted)}
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.news-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid #f1f5f9;transition:transform .25s}
.news-card:hover{transform:translateY(-4px)}
.news-card img{width:100%;height:160px;object-fit:cover}
.news-card-body{padding:20px}
.news-date{font-size:12px;color:var(--muted);margin-bottom:6px}
.news-card h3{font-size:1rem;font-weight:700;margin-bottom:8px;line-height:1.4}
.news-card p{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cta-section{background:var(--gradient);padding:70px 0;text-align:center;color:#fff}
.cta-section h2{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:12px}
.cta-section p{opacity:.9;margin-bottom:28px}
footer{background:var(--dark);color:#94a3b8;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand h3{color:#fff;font-size:1.2rem;margin-bottom:12px}
.footer-brand p{font-size:14px;line-height:1.7}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;transition:color .2s}
.footer-col a:hover{color:#38bdf8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:13px;flex-wrap:wrap;gap:12px}
@media(max-width:992px){
.navbar-toggler{display:flex}
.nav-menu{position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.1);transform:translateY(-120%);opacity:0;visibility:hidden;transition:all .3s;max-height:calc(100vh - 70px);overflow-y:auto}
.nav-menu.open{transform:translateY(0);opacity:1;visibility:visible}
.dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;display:none;padding-left:12px}
.dropdown.open .dropdown-menu{display:block}
.hero-grid{grid-template-columns:1fr;gap:36px}
.pricing-grid{grid-template-columns:1fr;max-width:360px;margin:0 auto}
.price-card.popular{transform:none}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
.hero{padding:110px 0 60px}
.hero-stats{gap:16px}
.stat-num{font-size:1.4rem}
.features-grid,.scenarios-grid,.testimonials-grid,.news-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.footer-bottom{flex-direction:column;text-align:center}
}
@media(max-width:480px){
.hero-btns{flex-direction:column}
.btn-lg{width:100%}
.demo-box{padding:16px}
}