*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft Yahei",sans-serif;}
body {background:#f7f8fa;color:#333;line-height:1.7;}
header {background:#165DFF;}
.nav-wrap {width:1200px;margin:0 auto;display:flex;align-items:center;}
.logo {color:#fff;font-size:22px;font-weight:bold;padding:16px 20px;}
nav ul {display:flex;list-style:none;}
nav ul li a {display:block;color:#e6edff;text-decoration:none;padding:18px 22px;font-size:15px;transition:0.2s;}
nav ul li a.active, nav ul li a:hover {background:#0f4cd8;color:#fff;}
.container {width:1200px;margin:0 auto;padding:40px 20px;}
.banner-box {text-align:center;padding:60px 0;background:linear-gradient(135deg,#2970ff,#5890ff);color:#fff;margin-bottom:40px;}
.banner-box h1 {font-size:42px;margin-bottom:12px;}
.banner-box h2 {font-size:24px;font-weight:normal;opacity:0.9;margin-bottom:30px;}
.download-btn {display:inline-block;padding:14px 40px;background:#fff;color:#165DFF;font-size:18px;font-weight:bold;text-decoration:none;border-radius:6px;transition:0.2s;}
.download-btn:hover {background:#f0f6ff;}
section {margin-bottom:60px;}
section h3 {font-size:28px;border-left:6px solid #165DFF;padding-left:14px;margin-bottom:24px;}
section h4 {font-size:22px;margin:20px 0 12px;color:#113377;}
.text-block {background:#fff;padding:24px 30px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.06);margin-bottom:20px;}
ul.feature-list {padding-left:22px;margin:10px 0;}
ul.feature-list li {margin-bottom:8px;}
.log-item {background:#fff;padding:16px 22px;border-radius:6px;margin-bottom:14px;box-shadow:0 1px 8px rgba(0,0,0,0.05);}
.log-item h5 {font-size:17px;color:#165DFF;margin-bottom:8px;}
.product-row {display:flex;gap:20px;margin-top:20px;}
.product-card {flex:1;background:#fff;padding:20px;text-align:center;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,0.06);}
footer {background:#0f2856;color:#b0c4e8;text-align:center;padding:30px;margin-top:60px;}