:root { --primary: #2563eb; --dark: #1e293b; --light
: #f8fafc; --accent: #6366f1; }
        * { box-sizing:
 border-box; margin: 0; padding: 0; }
        body { font-family: '
PingFang SC', 'Microsoft YaHei', sans-serif; line-height: 1.6; color: #
334155; background: #fff; }
        .container { max-width: 1200px
; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 
0; background: #fff; border-bottom: 1px solid #e2e8f0; 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
: var(--dark); font-weight: 500; }
        .hero { padding: 80px 
0; text-align: center; background: linear-gradient(135deg, #eff6ff 0%, #
f1f5f9 100%); }
        .btn { display: inline-block; padding: 12
px 30px; background: var(--primary); color: #fff; border-radius: 6px; text-decoration:
 none; transition: 0.3s; }
        .btn:hover { background: var(--accent); }

        .section { padding: 60px 0; }
        h2 { text-align: center; margin-bottom
: 40px; font-size: 2rem; }
        .grid { display: grid; grid-template-columns
: repeat(auto-fit, minmax(280px, 1fr)); gap: 25
px; }
        .card { padding: 25px; border: 1px solid #e2
e8f0; border-radius: 12px; transition: 0.3s; }

        .card:hover { box-shadow: 0 10px 20px rgba(0,0
,0,0.05); }
        .faq-item { margin-bottom: 15px; border:
 1px solid #e2e8f0; border-radius: 8px; }
        .
faq-q { padding: 15px; cursor: pointer; font-weight: 600; display: flex
; justify-content: space-between; }
        .faq-a { padding: 0 15px; max
-height: 0; overflow: hidden; transition: 0.3s; color: #6474
8b; }
        footer { background: var(--dark); color: #fff; padding: 40px 0
; text-align: center; }
        .float-kefu { position: fixed; right: 20px;
 bottom: 50px; z-index: 999; }
        table { width: 10
0%; border-collapse: collapse; margin-top: 20px; }
        th, td { padding: 12
px; border: 1px solid #e2e8f0; text-align: center; }