*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft Yahei",sans-serif;}
a{text-decoration:none;color:#333;}
ul,li{list-style:none;}
.container{width:1200px;margin:0 auto;max-width:95%;}
.title{text-align:center;font-size:32px;color:#111;margin-bottom:50px;padding-top:20px;}
.section{padding:70px 0;}
.bg-gray{background:#f7f8fa;}

/* 导航 */
.header{background:#fff;box-shadow:0 2px 8px #eee;position:sticky;top:0;z-index:99;}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:70px;}
.logo{font-size:22px;font-weight:bold;color:#0066ff;}
.nav a{margin:0 15px;font-size:16px;}
.nav a.active{color:#0066ff;border-bottom:2px solid #0066ff;padding-bottom:4px;}

/* 首屏 */
.banner{height:550px;background:#0066ff linear-gradient(135deg,#0044cc,#0088ff);display:flex;align-items:center;color:#fff;text-align:center;}
.banner-text h1{font-size:46px;margin-bottom:20px;}
.banner-text p{font-size:18px;margin-bottom:35px;opacity:0.95;}
.btn{display:inline-block;background:#fff;color:#0066ff;padding:14px 36px;border-radius:30px;font-weight:bold;transition:0.3s;}
.btn:hover{background:#003399;color:#fff;}

/* 关于我们 */
.about-text{font-size:17px;line-height:2;max-width:900px;margin:0 auto;color:#444;}
.about-text p{margin-bottom:15px;}

/* 产品 */
.product-list{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;}
.product-item{background:#fff;padding:35px 25px;border-radius:12px;box-shadow:0 3px 12px #e8e8e8;}
.product-item h3{font-size:22px;color:#0066ff;margin-bottom:16px;}
.product-item p{line-height:1.8;color:#555;}

/* 解决方案 */
.solve-list{max-width:800px;margin:0 auto;}
.solve-list li{font-size:18px;line-height:2.2;color:#333;padding-left:20px;position:relative;}
.solve-list li::before{content:"●";color:#0066ff;position:absolute;left:0;}

/* 联系我们 */
.contact-info{text-align:center;font-size:18px;line-height:2.4;color:#333;}

/* 底部 */
.footer{background:#1a1a1a;color:#aaa;text-align:center;padding:30px 0;font-size:14px;}