*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:#2d3748;background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.98);border-bottom:1px solid #e2e8f0;box-shadow:0 2px 8px rgba(0,0,0,0.06)}
.header-container{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:70px}
.site-logo{display:flex;align-items:center;gap:12px}
.site-logo img{height:44px;width:auto}
.site-logo-text{font-size:20px;font-weight:700;color:#2d3748}
.site-logo-sub{font-size:12px;color:#718096;margin-top:2px}
.main-nav{display:flex;align-items:center}
.main-nav>ul{list-style:none;display:flex;align-items:center}
.main-nav>ul>li{position:relative}
.main-nav>ul>li>a{display:block;padding:0 16px;line-height:70px;color:#2d3748;font-size:15px;font-weight:500;transition:all .3s}
.main-nav>ul>li>a:hover{color:#60a5fa}
.main-nav .submenu{position:absolute;top:100%;left:0;min-width:180px;background:#fff;border:1px solid #e2e8f0;border-top:2px solid #60a5fa;box-shadow:0 8px 24px rgba(0,0,0,0.12);list-style:none;padding:8px 0;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;z-index:999}
.main-nav>ul>li:hover .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.main-nav .submenu li a{display:block;padding:10px 20px;color:#2d3748;font-size:14px;transition:all .2s}
.main-nav .submenu li a:hover{background:#f7fafc;color:#60a5fa;padding-left:24px}
.mobile-menu-btn{display:none;background:none;border:none;font-size:24px;color:#2d3748;cursor:pointer;padding:8px}
.section{padding:70px 0}
.section-gray{background:#f7fafc}
.section-container{max-width:1280px;margin:0 auto;padding:0 20px}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:32px;font-weight:700;color:#2d3748;margin:0 0 12px}
.section-title .title-line{width:50px;height:3px;background:#60a5fa;margin:0 auto 16px}
.section-title p{font-size:15px;color:#718096;margin:0}
.product-card,.case-card,.news-card{background:#fff;border-radius:8px;overflow:hidden;transition:all .3s;border:1px solid #e2e8f0}
.product-card:hover,.case-card:hover,.news-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,0.12)}
.card-img{height:200px;background:#edf2f7;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .card-img img{transform:scale(1.05)}
.card-body{padding:20px}
.card-title{font-size:18px;font-weight:600;color:#2d3748;margin:0 0 10px}
.card-desc{font-size:14px;color:#718096;line-height:1.7;margin:0}
.card-more{display:inline-block;margin-top:12px;color:#60a5fa;font-size:13px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.btn{display:inline-block;padding:12px 32px;border-radius:4px;font-size:15px;font-weight:500;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:#60a5fa;color:#fff}
.btn-primary:hover{background:#3b82f6}
.btn-outline{background:transparent;color:#2d3748;border:1px solid #2d3748}
.btn-outline:hover{background:#2d3748;color:#fff}
.text-center{text-align:center}
.mt-30{margin-top:30px}
.cta-section{background:linear-gradient(135deg,#1a202c 0%,#2d3748 100%);padding:70px 0;text-align:center;color:#fff}
.cta-section h2{font-size:28px;margin:0 0 16px}
.cta-section p{font-size:16px;color:#a0aec0;margin:0 0 28px}
.site-footer{background:#1a202c;color:#a0aec0;padding:50px 0 20px}
.footer-container{max-width:1280px;margin:0 auto;padding:0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin:0 0 18px}
.footer-col p,.footer-col a{color:#a0aec0;font-size:14px;line-height:2;display:block}
.footer-col a:hover{color:#60a5fa}
.footer-bottom{border-top:1px solid #2d3748;padding-top:20px;text-align:center;font-size:13px;color:#718096}
.ai-keyword-block{background:#f7fafc;padding:30px 0;border-top:1px solid #e2e8f0}
.ai-keyword-block .keyword-list{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.ai-keyword-block .keyword-tag{padding:6px 16px;background:#fff;border:1px solid #e2e8f0;border-radius:20px;font-size:13px;color:#718096}
.list-page{padding:40px 0}
.list-header{margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid #e2e8f0}
.list-header h1{font-size:28px;color:#2d3748;margin:0 0 8px}
.list-item{display:flex;gap:24px;padding:24px 0;border-bottom:1px solid #e2e8f0}
.list-item-img{width:240px;height:160px;flex-shrink:0;border-radius:6px;overflow:hidden;background:#edf2f7}
.list-item-img img{width:100%;height:100%;object-fit:cover}
.list-item-content{flex:1}
.list-item-title{font-size:20px;font-weight:600;color:#2d3748;margin:0 0 10px}
.list-item-desc{font-size:14px;color:#718096;line-height:1.8;margin:0 0 12px}
.list-item-meta{font-size:13px;color:#a0aec0}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px;flex-wrap:wrap}
.pagination a,.pagination span{padding:8px 16px;border:1px solid #e2e8f0;border-radius:4px;color:#2d3748;font-size:14px}
.pagination a:hover{background:#60a5fa;color:#fff;border-color:#60a5fa}
.pagination .current{background:#60a5fa;color:#fff;border-color:#60a5fa}
.detail-page{padding:40px 0}
.detail-header{text-align:center;margin-bottom:30px;padding-bottom:24px;border-bottom:1px solid #e2e8f0}
.detail-header h1{font-size:30px;color:#2d3748;margin:0 0 16px;line-height:1.4}
.detail-meta{font-size:14px;color:#718096}
.detail-content{font-size:16px;line-height:2;color:#2d3748}
.detail-content img{max-width:100%;height:auto;border-radius:6px;margin:16px 0}
.about-flex{display:flex;gap:50px;align-items:center;flex-wrap:wrap}
.about-text{flex:1;min-width:300px;font-size:15px;line-height:1.9;color:#2d3748}
.about-img{flex:1;min-width:300px;height:340px;border-radius:8px;overflow:hidden;background:#edf2f7}
.about-img img{width:100%;height:100%;object-fit:cover}
.banner-swiper{width:100%;position:relative}
.banner-swiper .swiper-slide{height:480px}
.banner-swiper .swiper-slide img{width:100%;height:100%;object-fit:cover}
@media(max-width:992px){
.mobile-menu-btn{display:block}
.main-nav{position:fixed;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid #e2e8f0;max-height:calc(100vh - 70px);overflow-y:auto;transform:translateX(-100%);transition:transform .3s;z-index:999;display:block}
.main-nav.open{transform:translateX(0)}
.main-nav>ul{flex-direction:column;width:100%}
.main-nav>ul>li{width:100%;border-bottom:1px solid #e2e8f0}
.main-nav>ul>li>a{line-height:50px;padding:0 20px}
.main-nav .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:#f7fafc;display:none}
.main-nav>ul>li.open .submenu{display:block}
.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr;gap:24px}
.list-item{flex-direction:column}
.list-item-img{width:100%;height:200px}
}
@media(max-width:576px){
.grid-3,.grid-4{grid-template-columns:1fr}
.section{padding:40px 0}
.section-title h2{font-size:24px}
.banner-swiper .swiper-slide{height:240px}
.footer-grid{grid-template-columns:1fr}
}