* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei",sans-serif;
}
body {
    background: #f8fafa;
    color:#222;
    line-height:1.7;
}
.container {
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
}
header{
    background:#0e5c48;
    color:#fff;
    padding:18px 0;
}
.header-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
}
.logo{
    font-size:24px;
    font-weight:bold;
}
nav a{
    color:#fff;
    text-decoration:none;
    margin-left:28px;
    font-size:16px;
}
.banner{
    background:linear-gradient(135deg,#157a60,#209e7c);
    color:#fff;
    padding:90px 0;
    text-align:center;
}
.banner h1{
    font-size:42px;
    margin-bottom:16px;
}
.banner p{
    font-size:18px;
    opacity:0.9;
    max-width:700px;
    margin:0 auto;
}
.section{
    padding:70px 0;
}
.section-title{
    text-align:center;
    font-size:30px;
    margin-bottom:45px;
    color:#0e5c48;
}
.row{
    display:grid;
    grid-template-columns:1fr 1fr 1fr;
    gap:30px;
}
.card{
    background:#fff;
    padding:30px;
    border-radius:10px;
    box-shadow:0 2px 12px #0000000c;
}
footer{
    background:#111;
    color:#aaa;
    text-align:center;
    padding:35px 0;
    margin-top:30px;
}