:root { --primary-color: #2ecc
71; --text-color: #333; --bg-color: #f9fdfa
; --card-bg: #fff; }
        * { 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-
color); }
        .container { max-width: 1200px; margin: 0 auto
; padding: 0 20px; }
        header { background: #fff; padding: 15px 0;
 box-shadow: 0 2px 5px rgba(0,0,0,0.05); position:
 sticky; top: 0; z-index: 1000; }
        nav { display:
 flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap
: 0; }
        .nav-links a { padding: 0 15px; text-decoration: none; color
: #555; font-weight: 500; }
        .hero { padding: 8
0px 0; text-align: center; background: linear-gradient(135deg, #e
8f8f0 0%, #ffffff 100%); }
        h1 { font-size: 2
.5rem; margin-bottom: 20px; color: #27ae60; }

        .btn { display: inline-block; padding: 12px 30px; background: var(--primary-
color); color: #fff; text-decoration: none; border-radius: 5px; margin-top: 2
0px; transition: 0.3s; }
        .grid { display: grid; grid-template-columns
: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-top
: 40px; }
        .card { background: var(--card-bg); padding: 2
5px; border-radius: 10px; box-shadow: 0 4px 6px
 rgba(0,0,0,0.05); transition: 0.3s; }
        
.card:hover { transform: translateY(-5px); }
        table { width: 100%; border
-collapse: collapse; margin-top: 20px; }
        th, td { padding: 15px;
 border: 1px solid #eee; text-align: left; }
        footer { background: #3
33; color: #fff; padding: 40px 0; text-align: center; margin-top: 
50px; }