*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
body{
    font-family:system-ui,-apple-system,sans-serif;
    color:#1f2937;
    background:#ffffff;
    line-height:1.6;
}
.container-site{
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
}
/*导航栏*/
.site-header{
    border-bottom:1px solid #e5e7eb;
    position:sticky;
    top:0;
    background:#fff;
    z-index:100;
}
.site-nav{
    display:flex;
    justify-content:space-between;
    align-items:center;
    height:64px;
}
.site-logo{
    font-size:20px;
    font-weight:bold;
    color:#2563eb;
    text-decoration:none;
}
.site-nav-links a{
    margin-left:28px;
    text-decoration:none;
    color:#4b5563;
}
.site-nav-links a:hover{
    color:#2563eb;
}
.btn-site{
    padding:9px 18px;
    border-radius:6px;
    border:none;
    cursor:pointer;
    font-size:14px;
}
.btn-site-primary{
    background:#2563eb;
    color:#fff;
}
.btn-site-outline{
    border:1px solid #2563eb;
    color:#2563eb;
    background:#fff;
}
/*Hero区块*/
.hero{
    padding:80px 0;
}
.hero h1{
    font-size:42px;
    margin-bottom:16px;
}
.hero p{
    font-size:18px;
    color:#6b7280;
    max-width:640px;
    margin-bottom:32px;
}
.hero-buttons{
    display:flex;
    gap:14px;
}
/*区块通用*/
.section{
    padding:60px 0;
}
.section-title{
    font-size:28px;
    text-align:center;
    margin-bottom:42px;
}
/*卡片网格*/
.grid-3{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:24px;
}
.site-card{
    background:#f9fafb;
    border-radius:10px;
    padding:24px;
    border:1px solid #e5e7eb;
}
.site-card h3{
    margin-bottom:10px;
    font-size:18px;
}
.site-card p{
    color:#6b7280;
}
/*页脚*/
.site-footer{
    border-top:1px solid #e5e7eb;
    padding:40px 0;
    margin-top:20px;
}
.footer-row{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:30px;
}
.footer-col h4{
    margin-bottom:14px;
}
.footer-col a{
    display:block;
    color:#6b7280;
    text-decoration:none;
    margin-bottom:8px;
}
.copyright{
    margin-top:30px;
    color:#9ca3af;
    font-size:13px;
}
/*表单基础样式*/
.form-item{
    margin-bottom:16px;
}
.form-item label{
    display:block;
    margin-bottom:6px;
    font-weight:500;
}
.form-item input,.form-item select,.form-item textarea{
    width:100%;
    padding:10px;
    border:1px solid #d1d5db;
    border-radius:6px;
    font-size:14px;
}
/*移动端适配*/
@media(max-width:768px){
    .site-nav-links{
        display:none;
    }
    .hero h1{
        font-size:30px;
    }
}