*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft Yahei",sans-serif;}
:root{
    --primary:#0F4C81;
    --orange:#E65100;
    --gray:#333;
    --light:#f5f7fa;
}
body{background:#fff;color:var(--gray);line-height:1.7;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}

/*导航栏*/
header{background:var(--primary);position:sticky;top:0;z-index:999;box-shadow:0 2px 8px #0003;}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:70px;}
.logo{color:#fff;font-size:22px;font-weight:bold;}
.nav-menu{display:flex;gap:2rem;}
.nav-menu a{color:#fff;text-decoration:none;transition:0.25s;}
.nav-menu a:hover,.nav-menu a.active{color:#ffb74d;}
.hamburger{display:none;color:#fff;font-size:28px;cursor:pointer;}

/*横幅banner*/
.banner{background:linear-gradient(rgba(15,76,129,0.85),rgba(15,76,129,0.85));color:#fff;padding:120px 0;}
.banner h1{font-size:42px;margin-bottom:16px;}
.banner p{font-size:18px;max-width:700px;opacity:0.95;}
.btn{display:inline-block;background:var(--orange);color:#fff;padding:12px 28px;border-radius:4px;text-decoration:none;margin-top:24px;transition:0.3s;border:none;cursor:pointer;}
.btn:hover{opacity:0.9;transform:translateY(-2px);}

/*区块通用*/
section{padding:70px 0;}
section.bg-light{background:var(--light);}
.sec-title{text-align:center;font-size:32px;color:var(--primary);margin-bottom:48px;position:relative;}
.sec-title::after{content:"";width:80px;height:3px;background:var(--orange);position:absolute;left:50%;transform:translateX(-50%);bottom:-12px;}

/*两栏布局*/
.row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}

/*卡片*/
.card-wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:24px;}
.card{background:#fff;padding:26px;border-radius:8px;box-shadow:0 2px 12px #00000014;transition:0.3s;}
.card:hover{transform:translateY(-6px);box-shadow:0 8px 20px #00000018;}
.card h3{color:var(--primary);margin-bottom:12px;}

/*团队人员*/
.person-item{display:flex;gap:20px;background:#fff;padding:22px;border-radius:8px;box-shadow:0 2px 10px #0001;}
.person-avatar{width:120px;height:140px;object-fit:cover;border-radius:6px;}

/*证书列表*/
.cert-item{background:#fff;padding:18px;border-radius:6px;margin-bottom:14px;box-shadow:0 1px 6px #00000010;}

/*页脚*/
footer{background:#112436;color:#ccc;padding:40px 0;}
.footer-wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;}
footer h4{color:#fff;margin-bottom:16px;font-size:17px;}
footer a{color:#ccc;text-decoration:none;display:block;margin-bottom:8px;}
.copyright{text-align:center;margin-top:30px;padding-top:20px;border-top:#273b4e solid 1px;}

/*面包屑*/
.breadcrumb{background:#e8edf2;padding:14px 0;font-size:14px;}
.breadcrumb a{color:var(--primary);text-decoration:none;}

input,textarea{border:#ddd solid 1px;border-radius:4px;padding:10px;width:100%;}

/*移动端适配*/
@media(max-width:768px){
    .nav-menu{position:absolute;top:70px;left:0;width:100%;background:var(--primary);flex-direction:column;padding:20px;display:none;}
    .nav-menu.show{display:flex;}
    .hamburger{display:block;}
    .row{grid-template-columns:1fr;}
    .banner h1{font-size:28px;}
    .person-item{flex-direction:column;}
}