:root { --primary-color
: #2ecc71; --text-color: #2d3436; --bg-light: #f9
fdfa; --border-color: #dcdde1; }
        * { box-sizing:
 border-box; margin: 0; padding: 0; }
        body { font-family: '
PingFang SC', 'Microsoft YaHei', sans-serif; line-height: 1.6; color: var(--
text-color); background-color: var(--bg-light); }
        .container { max-width: 12
00px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff
; padding: 15px 0; border-bottom: 1px solid var(--border-color);
 position: sticky; top: 0; z-index: 1000; }
        .nav
-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .nav-links
 { display: flex; gap: 0; align-items: center; }
        .nav-links a
 { padding: 10px 15px; text-decoration: none; color: #636e
72; font-weight: 500; }
        .hero { padding: 80px 0; text
-align: center; background: linear-gradient(135deg, #e8f8f0 0%, #ffffff 
100%); }
        h1 { font-size: 2.5rem; color: #10
ac84; margin-bottom: 20px; }
        .btn { display: inline-block; padding: 
12px 30px; background: var(--primary-color); color: #fff; text-decoration: none; border
-radius: 5px; transition: 0.3s; }
        .btn:hover { background: #2
7ae60; }
        section { padding: 60px 0; }
        .grid {
 display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1
fr)); gap: 30px; }
        .card { background: #fff; padding: 30px; border
-radius: 10px; border: 1px solid var(--border-color); transition: 0.3
s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0 
10px 20px rgba(0,0,0,0.05); }
        footer
 { background: #2d3436; color: #dfe6e9; padding: 40px 0
; text-align: center; }
        @media (max-width: 768px) { .nav-links {
 display: none; } }