*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#6366f1;--primary-dark:#4f46e5;--secondary:#8b5cf6;--accent:#ec4899;--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);--gradient:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;line-height:1.6;color:var(--dark);background:var(--light);overflow-x:hidden}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit;transition:all 0.3s}
img{max-width:100%;height:auto}
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-weight:600;transition:all 0.3s;cursor:pointer;border:none;font-size:16px}
.btn-primary{background:var(--gradient);color:var(--white);box-shadow:0 4px 14px rgba(99,102,241,0.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(99,102,241,0.6)}
.btn-secondary{background:var(--white);color:var(--primary);border:2px solid var(--primary)}
.btn-secondary:hover{background:var(--primary);color:var(--white)}
header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);transition:all 0.3s}
header.scrolled{background:rgba(15,23,42,0.95);box-shadow:var(--shadow)}
nav{display:flex;justify-content:space-between;align-items:center;padding:16px 0}
.logo{font-size:24px;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-menu{display:flex;gap:32px;list-style:none;align-items:center}
.nav-item{position:relative}
.nav-link{color:var(--dark);font-weight:500;padding:8px 0;transition:color 0.3s}
header.scrolled .nav-link{color:var(--white)}
.nav-link:hover{color:var(--primary)}
.dropdown{position:relative}
.dropdown-menu{position:absolute;top:100%;left:0;background:var(--white);border-radius:12px;box-shadow:var(--shadow-lg);padding:12px 0;min-width:200px;opacity:0;visibility:hidden;transform:translateY(10px);transition:all 0.3s}
.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu a{display:block;padding:10px 20px;color:var(--dark);transition:all 0.3s}
.dropdown-menu a:hover{background:var(--light);color:var(--primary)}
.hamburger{display:none;flex-direction:column;gap:4px;cursor:pointer}
.hamburger span{width:24px;height:2px;background:var(--dark);transition:all 0.3s}
header.scrolled .hamburger span{background:var(--white)}
.hero{padding:140px 0 80px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:var(--white);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom/cover}
.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;position:relative;z-index:1}
.hero-title{font-size:48px;font-weight:800;margin-bottom:20px;line-height:1.2}
.hero-subtitle{font-size:20px;margin-bottom:32px;opacity:0.9}
.hero-buttons{display:flex;gap:16px;margin-bottom:40px}
.hero-stats{display:flex;gap:40px}
.stat-item{text-align:center}
.stat-number{font-size:36px;font-weight:700;display:block}
.stat-label{font-size:14px;opacity:0.8}
.hero-demo{background:var(--white);border-radius:16px;padding:24px;box-shadow:var(--shadow-lg)}
.demo-header{display:flex;gap:8px;margin-bottom:20px}
.demo-dot{width:12px;height:12px;border-radius:50%}
.demo-dot:nth-child(1){background:#ff5f56}
.demo-dot:nth-child(2){background:#ffbd2e}
.demo-dot:nth-child(3){background:#27c93f}
.demo-content{background:var(--light);border-radius:8px;padding:20px;min-height:300px}
.section{padding:80px 0}
.section-title{text-align:center;font-size:36px;font-weight:700;margin-bottom:16px}
.section-subtitle{text-align:center;color:var(--gray);font-size:18px;margin-bottom:60px}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px}
.feature-card{background:var(--white);padding:32px;border-radius:16px;box-shadow:var(--shadow);transition:all 0.3s}
.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.feature-icon{width:64px;height:64px;background:var(--gradient);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:28px}
.feature-title{font-size:20px;font-weight:600;margin-bottom:12px}
.feature-desc{color:var(--gray);line-height:1.8}
.scenarios-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px}
.scenario-card{background:var(--white);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:all 0.3s}
.scenario-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.scenario-img{height:200px;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-size:48px;color:var(--white)}
.scenario-content{padding:24px}
.scenario-title{font-size:20px;font-weight:600;margin-bottom:12px}
.scenario-desc{color:var(--gray);line-height:1.8}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px;max-width:1000px;margin:0 auto}
.pricing-card{background:var(--white);padding:40px 32px;border-radius:16px;box-shadow:var(--shadow);text-align:center;transition:all 0.3s;position:relative}
.pricing-card.featured{transform:scale(1.05);border:2px solid var(--primary)}
.pricing-card.featured::before{content:'最受欢迎';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gradient);color:var(--white);padding:4px 16px;border-radius:20px;font-size:12px;font-weight:600}
.pricing-title{font-size:24px;font-weight:600;margin-bottom:8px}
.pricing-price{font-size:48px;font-weight:700;color:var(--primary);margin-bottom:24px}
.pricing-price span{font-size:16px;color:var(--gray)}
.pricing-features{list-style:none;margin-bottom:32px;text-align:left}
.pricing-features li{padding:12px 0;border-bottom:1px solid var(--light);display:flex;align-items:center;gap:12px}
.pricing-features li::before{content:'✓';color:var(--primary);font-weight:700}
.faq-grid{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);margin-bottom:16px;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.faq-question{padding:20px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all 0.3s}
.faq-question:hover{background:var(--light)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all 0.3s}
.faq-item.active .faq-answer{padding:0 24px 20px;max-height:500px}
.faq-item.active .faq-question{color:var(--primary)}
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px}
.testimonial-card{background:var(--white);padding:32px;border-radius:16px;box-shadow:var(--shadow)}
.testimonial-header{display:flex;align-items:center;gap:16px;margin-bottom:20px}
.testimonial-avatar{width:56px;height:56px;border-radius:50%;background:var(--gradient);display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:700;font-size:20px}
.testimonial-info h4{font-size:16px;font-weight:600}
.testimonial-info p{font-size:14px;color:var(--gray)}
.testimonial-content{color:var(--gray);line-height:1.8;font-style:italic}
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:32px}
.news-card{background:var(--white);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:all 0.3s}
.news-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.news-img{height:200px;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-size:48px;color:var(--white)}
.news-content{padding:24px}
.news-date{font-size:14px;color:var(--gray);margin-bottom:8px}
.news-title{font-size:20px;font-weight:600;margin-bottom:12px;line-height:1.4}
.news-excerpt{color:var(--gray);line-height:1.8;margin-bottom:16px}
.news-link{color:var(--primary);font-weight:600;display:inline-flex;align-items:center;gap:8px}
.cta{background:var(--gradient);color:var(--white);text-align:center;padding:80px 0}
.cta h2{font-size:36px;font-weight:700;margin-bottom:16px}
.cta p{font-size:18px;margin-bottom:32px;opacity:0.9}
footer{background:var(--dark);color:var(--white);padding:60px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:40px;margin-bottom:40px}
.footer-col h3{font-size:18px;font-weight:600;margin-bottom:20px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{color:rgba(255,255,255,0.7);transition:color 0.3s}
.footer-col ul li a:hover{color:var(--white)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,0.1);color:rgba(255,255,255,0.7);font-size:14px}
@media(max-width:992px){.hero-content{grid-template-columns:1fr;gap:40px}.hero-title{font-size:36px}.nav-menu{position:fixed;top:70px;left:-100%;width:100%;height:calc(100vh - 70px);background:var(--white);flex-direction:column;padding:40px 20px;transition:left 0.3s;overflow-y:auto}header.scrolled .nav-menu{background:var(--dark)}.nav-menu.active{left:0}.hamburger{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:32px}.hero-stats{flex-direction:column;gap:20px}.section-title{font-size:28px}.pricing-card.featured{transform:none}}
@media(max-width:480px){.hero-title{font-size:28px}.hero-buttons{flex-direction:column}.btn{width:100%;text-align:center}}