*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#0088cc;--primary-dark:#006699;--secondary:#229ED9;--accent:#2CD36F;--text:#333;--text-light:#666;--bg:#f8f9fa;--white:#fff;--shadow:0 2px 15px rgba(0,0,0,0.08);--shadow-lg:0 10px 40px rgba(0,0,0,0.12);--radius:12px;--transition:all 0.3s ease}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;color:var(--text);line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:var(--transition)}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 32px;border-radius:50px;font-weight:600;font-size:16px;cursor:pointer;transition:var(--transition);border:none;gap:8px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);box-shadow:0 4px 20px rgba(0,136,204,0.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(0,136,204,0.4)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:var(--white)}
.btn-lg{padding:18px 42px;font-size:18px}
.section{padding:100px 0}
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:42px;font-weight:700;margin-bottom:16px;color:var(--text)}
.section-title p{font-size:18px;color:var(--text-light);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)}
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{height:40px;width:40px;border-radius:8px}
.nav-menu{display:flex;align-items:center;gap:32px;list-style:none}
.nav-menu>li{position:relative}
.nav-menu>li>a{font-size:15px;font-weight:500;color:var(--text);padding:8px 0;display:flex;align-items:center;gap:4px}
.nav-menu>li>a:hover{color:var(--primary)}
.nav-menu>li>a .arrow{transition:var(--transition);font-size:12px}
.nav-menu>li:hover>a .arrow{transform:rotate(180deg)}
.dropdown{position:absolute;top:100%;left:0;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:12px 0;min-width:200px;opacity:0;visibility:hidden;transform:translateY(10px);transition:var(--transition)}
.nav-menu>li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:10px 20px;font-size:14px;color:var(--text)}
.dropdown a:hover{background:var(--bg);color:var(--primary)}
.nav-btn{display:flex;align-items:center;gap:12px}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--text);transition:var(--transition)}
.hero{padding:140px 0 100px;background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:80%;height:200%;background:radial-gradient(circle,rgba(0,136,204,0.05) 0%,transparent 70%);pointer-events:none}
.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text h1{font-size:52px;font-weight:800;line-height:1.2;margin-bottom:20px}
.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(--text-light);margin-bottom:32px;line-height:1.7}
.hero-stats{display:flex;gap:40px;margin-top:40px}
.hero-stat{text-align:center}
.hero-stat .num{font-size:36px;font-weight:700;color:var(--primary)}
.hero-stat .label{font-size:14px;color:var(--text-light);margin-top:4px}
.hero-demo{position:relative}
.demo-container{background:var(--white);border-radius:20px;box-shadow:var(--shadow-lg);padding:24px;position:relative;overflow:hidden}
.demo-header{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid #eee;margin-bottom:16px}
.demo-avatar{width:48px;height:48px;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}
.demo-info h4{font-size:16px;font-weight:600}
.demo-info span{font-size:13px;color:var(--accent)}
.demo-messages{min-height:300px;display:flex;flex-direction:column;gap:12px}
.demo-msg{max-width:80%;padding:12px 16px;border-radius:16px;font-size:14px;line-height:1.5;animation:fadeIn 0.5s ease}
.demo-msg.received{background:#f0f0f0;border-bottom-left-radius:4px;align-self:flex-start}
.demo-msg.sent{background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);border-bottom-right-radius:4px;align-self:flex-end}
.demo-input{display:flex;gap:12px;margin-top:16px;padding-top:16px;border-top:1px solid #eee}
.demo-input input{flex:1;padding:12px 16px;border:1px solid #ddd;border-radius:24px;font-size:14px;outline:none;transition:var(--transition)}
.demo-input input:focus{border-color:var(--primary)}
.demo-input button{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));border:none;color:var(--white);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.demo-input button:hover{transform:scale(1.1)}
.features{background:var(--white)}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{padding:32px 24px;border-radius:var(--radius);background:var(--white);border:1px solid #eee;transition:var(--transition);text-align:center}
.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.feature-icon{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,rgba(0,136,204,0.1),rgba(34,158,217,0.1));display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:28px}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-light);line-height:1.6}
.scenarios{background:var(--bg)}
.scenarios-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scenario-card{background:var(--white);border-radius:var(--radius);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow)}
.scenario-card:hover{transform:translateY(-8px);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:24px}
.scenario-content h3{font-size:18px;font-weight:600;margin-bottom:10px}
.scenario-content p{font-size:14px;color:var(--text-light);line-height:1.6}
.pricing{background:var(--white)}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:center}
.pricing-card{padding:40px 32px;border-radius:var(--radius);background:var(--white);border:2px solid #eee;text-align:center;transition:var(--transition)}
.pricing-card.popular{border-color:var(--primary);transform:scale(1.05);box-shadow:var(--shadow-lg);position:relative}
.pricing-card.popular::before{content:'最受欢迎';position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);padding:6px 20px;border-radius:20px;font-size:13px;font-weight:600}
.pricing-card:hover{border-color:var(--primary);transform:translateY(-5px)}
.pricing-card.popular:hover{transform:scale(1.05) translateY(-5px)}
.pricing-name{font-size:20px;font-weight:600;margin-bottom:8px}
.pricing-price{font-size:48px;font-weight:700;color:var(--primary);margin:20px 0}
.pricing-price span{font-size:16px;color:var(--text-light);font-weight:400}
.pricing-features{list-style:none;margin:24px 0;text-align:left}
.pricing-features li{padding:10px 0;border-bottom:1px solid #f0f0f0;font-size:14px;display:flex;align-items:center;gap:10px}
.pricing-features li::before{content:'✓';color:var(--accent);font-weight:700}
.faq{background:var(--bg)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow)}
.faq-question{padding:20px 24px;font-size:16px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.faq-question:hover{color:var(--primary)}
.faq-question .icon{transition:var(--transition);font-size:20px}
.faq-item.active .faq-question .icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all 0.4s ease}
.faq-item.active .faq-answer{padding:0 24px 20px;max-height:500px}
.faq-answer p{font-size:14px;color:var(--text-light);line-height:1.8}
.testimonials{background:var(--white)}
.testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testimonial-card{padding:32px;border-radius:var(--radius);background:var(--white);border:1px solid #eee;transition:var(--transition)}
.testimonial-card:hover{box-shadow:var(--shadow-lg);border-color:transparent}
.testimonial-stars{color:#ffc107;margin-bottom:16px;font-size:18px}
.testimonial-text{font-size:15px;color:var(--text-light);line-height:1.7;margin-bottom:20px;font-style:italic}
.testimonial-author{display:flex;align-items:center;gap:12px}
.testimonial-avatar{width:48px;height:48px;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:15px;font-weight:600}
.testimonial-info span{font-size:13px;color:var(--text-light)}
.news{background:var(--bg)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--white);border-radius:var(--radius);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow)}
.news-card:hover{transform:translateY(-8px);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:24px}
.news-date{font-size:13px;color:var(--text-light);margin-bottom:8px}
.news-content h3{font-size:18px;font-weight:600;margin-bottom:10px;line-height:1.4}
.news-content h3 a:hover{color:var(--primary)}
.news-content p{font-size:14px;color:var(--text-light);line-height:1.6;margin-bottom:16px}
.news-link{font-size:14px;color:var(--primary);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.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:16px}
.cta p{font-size:18px;opacity:0.9;margin-bottom:32px}
.cta .btn{background:var(--white);color:var(--primary)}
.cta .btn:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(0,0,0,0.2)}
footer{background:#1a1a2e;color:#fff;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:rgba(255,255,255,0.7);margin-top:16px;line-height:1.7}
.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:rgba(255,255,255,0.7);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--white);padding-left:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:30px;text-align:center;font-size:14px;color:rgba(255,255,255,0.5)}
.breadcrumb{padding:20px 0;font-size:14px;color:var(--text-light)}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{margin:0 8px}
.news-detail{padding:60px 0}
.news-detail-content{display:grid;grid-template-columns:1fr 320px;gap:40px}
.news-article{background:var(--white);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.news-article h1{font-size:32px;font-weight:700;margin-bottom:20px;line-height:1.4}
.news-meta{display:flex;gap:20px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid #eee;font-size:14px;color:var(--text-light)}
.news-article-content{font-size:16px;line-height:1.8}
.news-article-content h2{font-size:24px;font-weight:600;margin:30px 0 16px;padding-left:12px;border-left:4px solid var(--primary)}
.news-article-content p{margin-bottom:20px}
.news-article-content img{border-radius:var(--radius);margin:20px 0}
.news-sidebar{position:sticky;top:90px;align-self:start}
.sidebar-card{background:var(--white);border-radius:var(--radius);padding:24px;margin-bottom:20px;box-shadow:var(--shadow)}
.sidebar-card h3{font-size:16px;font-weight:600;margin-bottom:16px;padding-left:12px;border-left:4px solid var(--primary)}
.toc-list{list-style:none}
.toc-list li{padding:10px 0;border-left:2px solid #eee;padding-left:16px;margin-left:8px;transition:var(--transition);cursor:pointer}
.toc-list li:hover,.toc-list li.active{border-left-color:var(--primary);color:var(--primary);font-weight:600}
.hot-news-list{list-style:none}
.hot-news-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid #f0f0f0;align-items:flex-start}
.hot-news-list li:last-child{border-bottom:none}
.hot-rank{width:24px;height:24px;border-radius:50%;background:#ddd;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--white);flex-shrink:0}
.hot-news-list li:nth-child(1) .hot-rank{background:linear-gradient(135deg,#ff6b6b,#ee5a5a)}
.hot-news-list li:nth-child(2) .hot-rank{background:linear-gradient(135deg,#ffa500,#ff8c00)}
.hot-news-list li:nth-child(3) .hot-rank{background:linear-gradient(135deg,#ffd700,#ffb700)}
.hot-news-list li a{font-size:14px;line-height:1.5}
.hot-news-list li a:hover{color:var(--primary)}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{padding:6px 14px;background:var(--bg);border-radius:20px;font-size:13px;color:var(--text-light);transition:var(--transition);cursor:pointer}
.tag:hover{background:var(--primary);color:var(--white)}
.comments{margin-top:40px}
.comments h3{font-size:20px;font-weight:600;margin-bottom:24px}
.comment-list{list-style:none}
.comment-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid #f0f0f0}
.comment-item:last-child{border-bottom:none}
.comment-avatar{width:48px;height:48px;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;flex-shrink:0}
.comment-content{flex:1}
.comment-header{display:flex;justify-content:space-between;margin-bottom:8px}
.comment-name{font-weight:600;font-size:15px}
.comment-date{font-size:13px;color:var(--text-light)}
.comment-text{font-size:14px;color:var(--text-light);line-height:1.6}
.news-nav{display:flex;justify-content:space-between;margin-top:40px;padding-top:30px;border-top:1px solid #eee}
.news-nav a{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-light)}
.news-nav a:hover{color:var(--primary)}
.related-news{margin-top:40px}
.related-news h3{font-size:20px;font-weight:600;margin-bottom:24px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.download-hero{padding:140px 0 80px;background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%)}
.download-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.download-info h1{font-size:42px;font-weight:800;margin-bottom:16px}
.download-info p{font-size:18px;color:var(--text-light);margin-bottom:32px}
.download-stats{display:flex;gap:32px;margin-top:32px}
.download-stat{text-align:center}
.download-stat .num{font-size:28px;font-weight:700;color:var(--primary)}
.download-stat .label{font-size:13px;color:var(--text-light);margin-top:4px}
.download-versions{padding:80px 0;background:var(--white)}
.version-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.version-card{padding:32px;border-radius:var(--radius);background:var(--white);border:2px solid #eee;text-align:center;transition:var(--transition)}
.version-card:hover{border-color:var(--primary);transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.version-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.version-size{font-size:14px;color:var(--text-light);margin-bottom:20px}
.version-features{list-style:none;text-align:left;margin:20px 0}
.version-features li{padding:8px 0;font-size:14px;display:flex;align-items:center;gap:8px}
.version-features li::before{content:'✓';color:var(--accent);font-weight:700}
.system-req{padding:80px 0;background:var(--bg)}
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.req-card{padding:24px;background:var(--white);border-radius:var(--radius);text-align:center;box-shadow:var(--shadow)}
.req-card .icon{font-size:32px;margin-bottom:12px}
.req-card h4{font-size:16px;font-weight:600;margin-bottom:8px}
.req-card p{font-size:14px;color:var(--text-light)}
.install-steps{padding:80px 0;background:var(--white)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-card{text-align:center;padding:32px 20px;position:relative}
.step-num{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin:0 auto 20px}
.step-card h4{font-size:16px;font-weight:600;margin-bottom:10px}
.step-card p{font-size:14px;color:var(--text-light)}
.sitemap-page{padding:120px 0 80px;min-height:100vh}
.sitemap-page h1{font-size:36px;font-weight:700;margin-bottom:40px;text-align:center}
.sitemap-section{margin-bottom:40px}
.sitemap-section h2{font-size:20px;font-weight:600;margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid var(--primary)}
.sitemap-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.sitemap-links a{padding:12px 16px;background:var(--bg);border-radius:8px;font-size:14px;transition:var(--transition)}
.sitemap-links a:hover{background:var(--primary);color:var(--white)}
.page-404{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%)}
.page-404 h1{font-size:120px;font-weight:800;color:var(--primary);line-height:1}
.page-404 p{font-size:20px;color:var(--text-light);margin:20px 0 40px}
.page-404 .countdown{font-size:16px;color:var(--text-light)}
@media(max-width:992px){
.nav-menu{display:none;position:fixed;top:70px;left:0;right:0;bottom:0;background:var(--white);flex-direction:column;padding:20px;gap:0;overflow-y:auto}
.nav-menu.active{display:flex}
.nav-menu>li{width:100%;border-bottom:1px solid #f0f0f0}
.nav-menu>li>a{padding:16px 0;justify-content:space-between}
.dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;display:none;padding:0 0 10px 20px}
.nav-menu>li.open .dropdown{display:block}
.hamburger{display:flex}
.hero-content,.download-content{grid-template-columns:1fr;gap:40px}
.hero-text h1{font-size:36px}
.features-grid{grid-template-columns:repeat(2,1fr)}
.scenarios-grid,.news-grid,.testimonials-grid,.version-grid,.req-grid{grid-template-columns:repeat(2,1fr)}
.pricing-grid{grid-template-columns:1fr}
.pricing-card.popular{transform:none}
.pricing-card.popular:hover{transform:translateY(-5px)}
.footer-grid{grid-template-columns:1fr 1fr}
.news-detail-content{grid-template-columns:1fr}
.news-sidebar{position:static}
.steps-grid{grid-template-columns:repeat(2,1fr)}
.sitemap-links{grid-template-columns:repeat(2,1fr)}
.related-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
.section{padding:60px 0}
.section-title h2{font-size:28px}
.hero{padding:100px 0 60px}
.hero-text h1{font-size:28px}
.hero-stats{flex-wrap:wrap;gap:20px}
.features-grid,.scenarios-grid,.news-grid,.testimonials-grid,.version-grid,.req-grid,.steps-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.sitemap-links{grid-template-columns:1fr}
}
@media(max-width:480px){
.hero-text h1{font-size:24px}
.hero-text p{font-size:16px}
.btn{padding:12px 24px;font-size:14px}
.btn-lg{padding:14px 28px;font-size:16px}
.section-title h2{font-size:24px}
.news-article{padding:24px}
.news-article h1{font-size:24px}
}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.animate{animation:fadeIn 0.6s ease forwards}