*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft Yahei",sans-serif;}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
body{color:#333;background:#fff;line-height:1.7;}
.container{width:92%;max-width:1200px;margin:0 auto;}

/* 导航栏 */
.header{background:#166534;color:#fff;position:sticky;top:0;z-index:999;box-shadow:0 2px 8px #0002;}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:70px;}
.logo{font-size:20px;font-weight:bold;}
.nav-list{display:flex;gap:32px;}
.nav-list a{padding:8px 0;position:relative;}
.nav-list a.active::after{content:"";position:absolute;bottom:0;left:0;width:100%;height:2px;background:#86efac;}

/* Banner */
.banner{background:#22c55e;color:#fff;padding:80px 0;text-align:center;}
.banner h1{font-size:36px;margin-bottom:12px;}
.banner p{font-size:18px;opacity:0.95;margin-bottom:30px;}
.btn-group{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
.btn{padding:12px 30px;border-radius:6px;font-size:16px;transition:0.3s;}
.btn-green{background:#fff;color:#166534;}
.btn-outline{border:1px solid #fff;color:#fff;}
.btn:hover{opacity:0.85;}

/* 通用区块 */
.section{padding:60px 0;}
.section-title{text-align:center;font-size:28px;color:#166534;margin-bottom:40px;position:relative;}
.section-title::after{content:"";width:60px;height:3px;background:#22c55e;display:block;margin:12px auto 0;}

/* 业务卡片 */
.card-wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;}
.card{border:1px solid #e5e7eb;border-radius:10px;padding:26px;transition:0.3s;}
.card:hover{box-shadow:0 6px 18px #00000012;border-color:#22c55e;}
.card h3{color:#166534;margin-bottom:10px;font-size:19px;}

/* 联系页面布局 */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.info-item{margin-bottom:16px;font-size:16px;}
.form-item{margin-bottom:18px;}
label{display:block;margin-bottom:6px;font-weight:500;}
input,select,textarea{width:100%;padding:12px;border:1px solid #ddd;border-radius:6px;font-size:15px;}
textarea{min-height:120px;resize:vertical;}
.submit-btn{background:#166534;color:#fff;border:0;cursor:pointer;font-size:16px;padding:13px;border-radius:6px;}
.submit-btn:hover{background:#15803d;}

/* 资质图片 */
.img-box{text-align:center;margin-top:20px;}
.img-box img{max-width:90%;border:1px solid #eee;border-radius:8px;}

/* 页脚 */
.footer{background:#111827;color:#ccc;padding:40px 0;text-align:center;font-size:14px;}
.footer p{margin:6px 0;}
.footer a{color:#60a5fa;}

/* 响应式适配手机 */
@media(max-width:768px){
    .nav-wrap{flex-direction:column;height:auto;padding:15px 0;gap:12px;}
    .nav-list{gap:16px;flex-wrap:wrap;justify-content:center;}
    .banner h1{font-size:26px;}
    .contact-wrap{grid-template-columns:1fr;}
}