*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2ecc71;--primary-dark:#27ae60;--secondary:#16a085;--accent:#f39c12;--text:#2c3e50;--text-light:#7f8c8d;--bg:#f8f9fa;--white:#fff;--shadow:0 2px 15px rgba(0,0,0,.08);--shadow-lg:0 10px 40px rgba(0,0,0,.12);--radius:12px;--transition:all .3s ease}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;color:var(--text);line-height:1.6;background:var(--bg)}
a{text-decoration:none;color:inherit;transition:var(--transition)}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-block;padding:12px 32px;border-radius:50px;font-weight:600;transition:var(--transition);border:none;cursor:pointer;font-size:16px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);box-shadow:0 4px 15px rgba(46,204,113,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(46,204,113,.4)}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:var(--white)}
header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);transition:var(--transition)}
header.scrolled{background:rgba(255,255,255,.98);box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:15px 0}
.logo{font-size:24px;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:10px}
.logo img{height:40px}
.nav-menu{display:flex;align-items:center;gap:30px;list-style:none}
.nav-item{position:relative}
.nav-link{padding:8px 0;font-weight:500;color:var(--text)}
.nav-link:hover{color:var(--primary)}
.dropdown{position:relative}
.dropdown-toggle{display:flex;align-items:center;gap:5px;cursor:pointer}
.dropdown-toggle::after{content:'▾';font-size:12px;transition:var(--transition)}
.dropdown:hover .dropdown-toggle::after{transform:rotate(180deg)}
.dropdown-menu{position:absolute;top:100%;left:0;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:10px 0;min-width:180px;opacity:0;visibility:hidden;transform:translateY(10px);transition:var(--transition)}
.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu a{display:block;padding:10px 20px;transition:var(--transition)}
.dropdown-menu a:hover{background:var(--bg);color:var(--primary)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer}
.mobile-toggle span{width:25px;height:3px;background:var(--text);transition:var(--transition)}
.hero{padding:120px 0 80px;background:linear-gradient(135deg,#f5f7fa 0%,#c3cfe2 100%);min-height:90vh;display:flex;align-items:center}
.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-title{font-size:48px;font-weight:700;line-height:1.2;margin-bottom:20px}
.hero-subtitle{font-size:20px;color:var(--text-light);margin-bottom:30px}
.hero-stats{display:flex;gap:40px;margin-top:40px}
.stat-item{text-align:center}
.stat-number{font-size:36px;font-weight:700;color:var(--primary)}
.stat-label{font-size:14px;color:var(--text-light)}
.hero-buttons{display:flex;gap:15px;margin-top:30px}
.demo-container{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 #eee}
.demo-dot{width:12px;height:12px;border-radius:50%}
.demo-dot.red{background:#ff5f56}
.demo-dot.yellow{background:#ffbd2e}
.demo-dot.green{background:#27c93f}
.demo-map{width:100%;height:300px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:var(--radius);position:relative;overflow:hidden;margin-bottom:20px}
.demo-map::before{content:'';position:absolute;inset:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,.1)" stroke-width="2"/><circle cx="50" cy="50" r="30" fill="none" stroke="rgba(255,255,255,.1)" stroke-width="2"/><circle cx="50" cy="50" r="20" fill="none" stroke="rgba(255,255,255,.1)" stroke-width="2"/></svg>') center/cover}
.demo-node{position:absolute;width:20px;height:20px;background:var(--primary);border-radius:50%;box-shadow:0 0 20px var(--primary);animation:pulse 2s infinite}
.demo-node:nth-child(1){top:30%;left:20%}
.demo-node:nth-child(2){top:50%;left:70%}
.demo-node:nth-child(3){top:70%;left:40%}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.2);opacity:.7}}
.demo-controls{display:flex;gap:15px;align-items:center}
.demo-connect-btn{flex:1;padding:15px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;transition:var(--transition)}
.demo-connect-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(46,204,113,.4)}
.demo-connect-btn.connected{background:linear-gradient(135deg,#e74c3c,#c0392b)}
.demo-speed{display:flex;gap:20px}
.speed-item{text-align:center}
.speed-value{font-size:24px;font-weight:700;color:var(--primary)}
.speed-label{font-size:12px;color:var(--text-light)}
.section{padding:80px 0}
.section-title{text-align:center;font-size:36px;font-weight:700;margin-bottom:15px}
.section-subtitle{text-align:center;color:var(--text-light);margin-bottom:50px;font-size:18px}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.feature-card{background:var(--white);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--transition)}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.feature-icon{width:60px;height:60px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:var(--radius);display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:28px}
.feature-title{font-size:20px;font-weight:600;margin-bottom:10px}
.feature-desc{color:var(--text-light);line-height:1.8}
.scenarios-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.scenario-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition)}
.scenario-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.scenario-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)}
.scenario-content{padding:25px}
.scenario-title{font-size:20px;font-weight:600;margin-bottom:10px}
.scenario-desc{color:var(--text-light)}
.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;box-shadow:var(--shadow);transition:var(--transition);position:relative}
.pricing-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.pricing-card.popular{border:2px solid var(--primary);transform:scale(1.05)}
.pricing-card.popular::before{content:'最受欢迎';position:absolute;top:-15px;left:50%;transform:translateX(-50%);background:var(--primary);color:var(--white);padding:5px 20px;border-radius:20px;font-size:14px;font-weight:600}
.pricing-name{font-size:24px;font-weight:600;margin-bottom:10px}
.pricing-price{font-size:48px;font-weight:700;color:var(--primary);margin-bottom:5px}
.pricing-price span{font-size:16px;color:var(--text-light)}
.pricing-features{list-style:none;margin:30px 0}
.pricing-features li{padding:10px 0;border-bottom:1px solid #eee;display:flex;align-items:center;gap:10px}
.pricing-features li::before{content:'✓';color:var(--primary);font-weight:700}
.faq-grid{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:15px;box-shadow:var(--shadow);overflow:hidden}
.faq-question{padding:20px 25px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.faq-question:hover{color:var(--primary)}
.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:var(--transition)}
.faq-item.active .faq-answer{padding:0 25px 20px;max-height:500px}
.faq-item.active .faq-question::after{transform:rotate(180deg)}
.faq-question::after{content:'▾';transition:var(--transition)}
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.testimonial-card{background:var(--white);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow)}
.testimonial-header{display:flex;align-items:center;gap:15px;margin-bottom:20px}
.testimonial-avatar{width:50px;height:50px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:700;font-size:20px}
.testimonial-name{font-weight:600}
.testimonial-role{font-size:14px;color:var(--text-light)}
.testimonial-content{color:var(--text-light);line-height:1.8}
.testimonial-stars{color:#f39c12;margin-top:10px}
.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;box-shadow:var(--shadow);transition:var(--transition)}
.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:14px;color:var(--text-light);margin-bottom:10px}
.news-title{font-size:18px;font-weight:600;margin-bottom:10px;line-height:1.4}
.news-title:hover{color:var(--primary)}
.news-excerpt{color:var(--text-light);font-size:14px;line-height:1.6}
.cta{background:linear-gradient(135deg,var(--primary),var(--secondary));padding:80px 0;text-align:center;color:var(--white)}
.cta-title{font-size:36px;font-weight:700;margin-bottom:20px}
.cta-subtitle{font-size:18px;margin-bottom:30px;opacity:.9}
.cta .btn-primary{background:var(--white);color:var(--primary)}
footer{background:#2c3e50;color:var(--white);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:40px}
.footer-col h4{font-size:18px;margin-bottom:20px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:rgba(255,255,255,.7);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--white)}
.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.7)}
@media(max-width:992px){.hero-content{grid-template-columns:1fr;gap:40px}.hero-title{font-size:36px}.nav-menu{position:fixed;top:70px;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;box-shadow:var(--shadow);transform:translateY(-150%);transition:var(--transition)}.nav-menu.active{transform:translateY(0)}.mobile-toggle{display:flex}.dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;padding-left:20px}}
@media(max-width:768px){.hero-title{font-size:28px}.hero-stats{flex-direction:column;gap:20px}.section-title{font-size:28px}.pricing-card.popular{transform:scale(1)}}
@media(max-width:480px){.hero-buttons{flex-direction:column}.demo-speed{flex-direction:column;gap:10px}}