*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2563eb;--primary-dark:#1d4ed8;--secondary:#06b6d4;--accent:#f59e0b;--dark:#0f172a;--gray:#64748b;--light:#f8fafc;--white:#ffffff;--shadow:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -1px rgba(0,0,0,0.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -2px rgba(0,0,0,0.05);--radius:12px;--transition:all 0.3s ease}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;line-height:1.6;color:var(--dark);background:var(--white);overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:8px;font-weight:600;font-size:16px;cursor:pointer;transition:var(--transition);border:none;text-align:center}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);box-shadow:0 4px 14px rgba(37,99,235,0.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,0.5)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:var(--white)}
.btn-lg{padding:16px 36px;font-size:18px}
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:36px;font-weight:700;margin-bottom:15px;color:var(--dark)}
.section-title p{font-size:18px;color:var(--gray);max-width:600px;margin:0 auto}
header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);transition:var(--transition);border-bottom:1px solid rgba(0,0,0,0.05)}
header.scrolled{background:rgba(255,255,255,0.98);box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:var(--primary)}
.nav-logo img{width:36px;height:36px}
.nav-menu{display:flex;align-items:center;gap:35px;list-style:none}
.nav-item{position:relative}
.nav-link{font-size:15px;font-weight:500;color:var(--dark);padding:8px 0;transition:var(--transition)}
.nav-link:hover{color:var(--primary)}
.nav-link.has-dropdown{display:flex;align-items:center;gap:5px}
.nav-link.has-dropdown::after{content:'▾';font-size:12px;transition:var(--transition)}
.nav-item:hover .nav-link.has-dropdown::after{transform:rotate(180deg)}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(10px);background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:12px 0;min-width:180px;opacity:0;visibility:hidden;transition:var(--transition)}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:10px 20px;font-size:14px;color:var(--dark);transition:var(--transition)}
.dropdown a:hover{background:var(--light);color:var(--primary)}
.nav-cta{margin-left:20px}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:10px}
.nav-toggle span{width:24px;height:2px;background:var(--dark);transition:var(--transition)}
.hero{padding:120px 0 80px;background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%);min-height:90vh;display:flex;align-items:center}
.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text h1{font-size:48px;font-weight:800;line-height:1.2;margin-bottom:20px;color:var(--dark)}
.hero-text h1 span{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-text p{font-size:20px;color:var(--gray);margin-bottom:30px;line-height:1.7}
.hero-buttons{display:flex;gap:15px;margin-bottom:40px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item .number{font-size:32px;font-weight:700;color:var(--primary);display:block}
.stat-item .label{font-size:14px;color:var(--gray)}
.hero-demo{background:var(--white);border-radius:20px;padding:30px;box-shadow:var(--shadow-lg)}
.demo-header{display:flex;align-items:center;gap:10px;margin-bottom:20px;padding-bottom:15px;border-bottom:1px solid #e2e8f0}
.demo-dot{width:12px;height:12px;border-radius:50%}
.demo-dot.red{background:#ef4444}
.demo-dot.yellow{background:#f59e0b}
.demo-dot.green{background:#22c55e}
.demo-title{margin-left:10px;font-size:14px;color:var(--gray)}
.demo-body{display:flex;flex-direction:column;gap:20px}
.demo-connect{display:flex;align-items:center;justify-content:space-between;padding:20px;background:var(--light);border-radius:12px}
.demo-status{display:flex;align-items:center;gap:15px}
.demo-indicator{width:12px;height:12px;border-radius:50%;background:#22c55e;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.5}}
.demo-connect-btn{padding:10px 24px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:var(--transition)}
.demo-connect-btn:hover{transform:scale(1.05)}
.demo-connect-btn.connected{background:linear-gradient(135deg,#22c55e,#16a34a)}
.demo-speed{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.speed-card{background:var(--light);padding:15px;border-radius:10px;text-align:center}
.speed-card .value{font-size:24px;font-weight:700;color:var(--primary)}
.speed-card .unit{font-size:12px;color:var(--gray)}
.demo-nodes{display:flex;gap:10px;flex-wrap:wrap}
.node-tag{padding:8px 16px;background:var(--light);border-radius:20px;font-size:13px;color:var(--gray);cursor:pointer;transition:var(--transition)}
.node-tag:hover,.node-tag.active{background:var(--primary);color:var(--white)}
.features{background:var(--white)}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.feature-card{background:var(--white);padding:35px 25px;border-radius:var(--radius);border:1px solid #e2e8f0;transition:var(--transition);text-align:center}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--primary)}
.feature-icon{width:60px;height:60px;margin:0 auto 20px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:15px;display:flex;align-items:center;justify-content:center;font-size:28px;color:var(--white)}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--dark)}
.feature-card p{font-size:14px;color:var(--gray);line-height:1.7}
.scenarios{background:var(--light)}
.scenarios-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px}
.scenario-card{background:var(--white);border-radius:var(--radius);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow)}
.scenario-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.scenario-img{height:180px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:48px;color:var(--white)}
.scenario-content{padding:25px}
.scenario-content h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--dark)}
.scenario-content p{font-size:14px;color:var(--gray);line-height:1.7}
.pricing{background:var(--white)}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;max-width:1000px;margin:0 auto}
.pricing-card{background:var(--white);border-radius:var(--radius);padding:40px 30px;border:2px solid #e2e8f0;transition:var(--transition);position:relative}
.pricing-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.pricing-card.popular{border-color:var(--primary);transform:scale(1.05)}
.pricing-card.popular::before{content:'最受欢迎';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);padding:5px 20px;border-radius:20px;font-size:12px;font-weight:600}
.pricing-header{text-align:center;margin-bottom:30px;padding-bottom:30px;border-bottom:1px solid #e2e8f0}
.pricing-header h3{font-size:22px;font-weight:600;margin-bottom:10px;color:var(--dark)}
.pricing-price{font-size:42px;font-weight:700;color:var(--primary)}
.pricing-price span{font-size:16px;color:var(--gray);font-weight:400}
.pricing-features{list-style:none;margin-bottom:30px}
.pricing-features li{padding:10px 0;display:flex;align-items:center;gap:10px;font-size:14px;color:var(--dark)}
.pricing-features li::before{content:'✓';color:var(--primary);font-weight:700}
.pricing-card .btn{width:100%}
.faq{background:var(--light)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:15px;overflow:hidden;box-shadow:var(--shadow)}
.faq-question{padding:20px 25px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;font-weight:600;font-size:16px;color:var(--dark);transition:var(--transition)}
.faq-question:hover{color:var(--primary)}
.faq-question::after{content:'+';font-size:24px;transition:var(--transition)}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:all 0.3s ease}
.faq-item.active .faq-answer{padding:0 25px 20px;max-height:500px}
.faq-answer p{font-size:14px;color:var(--gray);line-height:1.8}
.testimonials{background:var(--white)}
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.testimonial-card{background:var(--light);padding:30px;border-radius:var(--radius);transition:var(--transition)}
.testimonial-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.testimonial-header{display:flex;align-items:center;gap:15px;margin-bottom:20px}
.testimonial-avatar{width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:700;font-size:18px}
.testimonial-info h4{font-size:16px;font-weight:600;color:var(--dark)}
.testimonial-info p{font-size:13px;color:var(--gray)}
.testimonial-stars{color:var(--accent);margin-bottom:15px}
.testimonial-text{font-size:14px;color:var(--gray);line-height:1.8;font-style:italic}
.news{background:var(--light)}
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:30px}
.news-card{background:var(--white);border-radius:var(--radius);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow)}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.news-img{height:200px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:48px;color:var(--white)}
.news-content{padding:25px}
.news-date{font-size:13px;color:var(--gray);margin-bottom:10px}
.news-content h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--dark);line-height:1.4}
.news-content p{font-size:14px;color:var(--gray);line-height:1.7;margin-bottom:15px}
.news-link{color:var(--primary);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:5px}
.news-link:hover{gap:10px}
.cta{background:linear-gradient(135deg,var(--primary),var(--secondary));padding:80px 0;text-align:center;color:var(--white)}
.cta h2{font-size:36px;font-weight:700;margin-bottom:20px}
.cta p{font-size:18px;opacity:0.9;margin-bottom:30px;max-width:600px;margin-left:auto;margin-right:auto}
.cta .btn{background:var(--white);color:var(--primary)}
.cta .btn:hover{background:var(--light)}
footer{background:var(--dark);color:var(--white);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{font-size:14px;color:#94a3b8;line-height:1.8;margin-top:15px}
.footer-col h4{font-size:16px;font-weight:600;margin-bottom:20px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:#94a3b8;transition:var(--transition)}
.footer-col ul li a:hover{color:var(--white)}
.footer-bottom{padding-top:30px;border-top:1px solid #334155;text-align:center;font-size:14px;color:#94a3b8}
@media(max-width:992px){.hero-content{grid-template-columns:1fr;gap:40px}.hero-text h1{font-size:36px}.hero-demo{order:-1}.nav-menu{position:fixed;top:70px;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;gap:0;transform:translateY(-100%);opacity:0;visibility:hidden;transition:var(--transition);box-shadow:var(--shadow-lg)}.nav-menu.active{transform:translateY(0);opacity:1;visibility:visible}.nav-toggle{display:flex}.nav-cta{margin-left:0;margin-top:15px}.dropdown{position:static;transform:none;box-shadow:none;opacity:1;visibility:visible;display:none;padding-left:20px}.nav-item:hover .dropdown,.nav-item.active .dropdown{display:block}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.pricing-card.popular{transform:none}}
@media(max-width:768px){.section{padding:60px 0}.section-title h2{font-size:28px}.hero{padding:100px 0 60px}.hero-text h1{font-size:30px}.hero-text p{font-size:16px}.hero-stats{gap:25px}.stat-item .number{font-size:24px}.features-grid,.scenarios-grid,.news-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}}
@media(max-width:480px){.hero-text h1{font-size:26px}.hero-buttons{flex-direction:column}.hero-buttons .btn{width:100%}.pricing-grid{grid-template-columns:1fr}.demo-speed{grid-template-columns:1fr}}
.fade-in{opacity:0;transform:translateY(30px);transition:all 0.6s ease}.fade-in.visible{opacity:1;transform:translateY(0)}
.slide-left{opacity:0;transform:translateX(-50px);transition:all 0.6s ease}.slide-left.visible{opacity:1;transform:translateX(0)}
.slide-right{opacity:0;transform:translateX(50px);transition:all 0.6s ease}.slide-right.visible{opacity:1;transform:translateX(0)}