*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft Yahei",sans-serif;}
:root{
    --primary:#0F4C81;
    --secondary:#48A999;
    --text-dark:#333333;
    --text-gray:#666666;
    --bg-light:#f7f9fc;
}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
a{text-decoration:none;color:var(--text-dark);}
ul{list-style:none;}

/* 头部导航 */
.site-header{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,0.08);position:sticky;top:0;z-index:999;}
.header-wrap{display:flex;align-items:center;justify-content:space-between;height:80px;}
.logo h1{font-size:20px;color:var(--primary);font-weight:600;}
.main-nav ul{display:flex;gap:28px;}
.main-nav a{padding:8px 0;}
.main-nav a.active{color:var(--primary);border-bottom:2px solid var(--primary);}
.header-tools{display:flex;align-items:center;gap:16px;}
.lang-switch{padding:6px 12px;border:1px solid var(--primary);border-radius:4px;color:var(--primary);}
.btn-inquiry{background:var(--primary);color:#fff;padding:8px 16px;border-radius:4px;}
.menu-toggle{display:none;border:none;background:none;font-size:18px;cursor:pointer;}

/* Banner首屏 */
.banner{height:520px;background:#0F4C81;background-image:url("../images/banner.jpg");background-size:cover;background-position:center;color:#fff;display:flex;align-items:center;}
.banner-content{max-width:700px;}
.banner-content h2{font-size:36px;margin-bottom:32px;line-height:1.4;}
.banner-btns{display:flex;gap:20px;}
.btn-primary{background:var(--primary);color:#fff;padding:14px 28px;border-radius:4px;display:inline-block;}
.btn-outline{border:1px solid #fff;color:#fff;padding:14px 28px;border-radius:4px;display:inline-block;}

/* 通用区块 */
.section{padding:80px 0;}
.section-title{text-align:center;font-size:32px;margin-bottom:48px;color:var(--primary);}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;}

/* 业务卡片 */
.business-card{background:#fff;padding:32px 24px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.06);}
.business-card h3{color:var(--primary);margin-bottom:12px;font-size:18px;}
.business-card p{color:var(--text-gray);line-height:1.6;}

/* 企业优势 */
.advantage{background:var(--bg-light);}
.advantage-list{max-width:800px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.advantage-list li{padding:16px;background:#fff;border-radius:6px;box-shadow:0 1px 6px rgba(0,0,0,0.05);}

/* 项目案例卡片 */
.project-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,0.06);}
.project-img{aspect-ratio:16/9;background:#e8f0f7;display:flex;align-items:center;justify-content:center;color:#666;}
.project-card h4{padding:16px;font-size:16px;}
.more-wrap{text-align:center;margin-top:32px;}

/* 资质板块 */
.qual-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
.qual-text p{margin-bottom:20px;color:var(--text-gray);line-height:1.7;}

/* 合作伙伴 */
.partner{background:var(--bg-light);}
.partner-list{display:flex;flex-wrap:wrap;gap:30px;justify-content:center;}

/* 新闻卡片 */
.news-card{background:#fff;padding:24px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.06);}
.news-card h4{margin-bottom:10px;color:var(--primary);}
.news-card p{color:var(--text-gray);}

/* 询盘表单 */
.inquiry{background:var(--bg-light);}
.inquiry-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.form-item{margin-bottom:16px;}
.form-item input,.form-item textarea{width:100%;padding:12px;border:1px solid #ddd;border-radius:4px;}
.inquiry-info h4{margin-bottom:16px;color:var(--primary);}
.inquiry-info p{margin-bottom:8px;color:var(--text-gray);}

/* 页脚 */
.site-footer{background:#0F4C81;color:#fff;padding:40px 0;}
.footer-top{margin-bottom:20px;}
.footer-bottom{opacity:0.7;font-size:14px;}

/* 移动端适配 */
@media(max-width:768px){
    .main-nav{display:none;}
    .banner-content h2{font-size:24px;}
    .advantage-list{grid-template-columns:1fr;}
    .menu-toggle{display:block;}
    .banner{height:400px;}
    .qual-wrap,.inquiry-wrap{grid-template-columns:1fr;}
}